INSTALLATION, OPERATION
& MAINTENANCE MANUAL
HTV/HTD/HTH Series
Two-Stage
Geothermal Heat Pumps
2 to 6 Tons
Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Safety
CAUTION: Indicates a potentially hazardous situation or an
unsafe practice, which if not avoided could result in minor or
moderate injury or product or property damage.
Warnings, cautions and notices appear throughout this manual.
Read these items carefully before attempting any installation,
service, or troubleshooting of the equipment.
NOTICE: Notification of installation, operation or maintenance
information, which is important, but which is not hazard-related.
DANGER: Indicates an immediate hazardous situation, which if
not avoided will result in death or serious injury. DANGER labels
on unit access panels must be observed.
ꢀ WARNING! ꢀ
WARNING: Indicates a potentially hazardous situation, which if
not avoided could result in death or serious injury.
WARNING! All refrigerant discharged from this unit must be
recovered WITHOUT EXCEPTION. Technicians must follow
industry accepted guidelines and all local, state, and federal
statutes for the recovery and disposal of refrigerants. If a
compressor is removed from this unit, refrigerant circuit oil will
remain in the compressor. To avoid leakage of compressor oil,
refrigerant lines of the compressor must be sealed after it is
removed.
ꢀ WARNING! ꢀ
WARNING! To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must be serviced
only by technicians who meet local, state, and federal
proficiency requirements.
ꢀ CAUTION! ꢀ
CAUTION! To avoid equipment damage, DO NOT use these
units as a source of heating or cooling during the construction
process. The mechanical components and filters will quickly
become clogged with construction dirt and debris, which may
cause system damage.
3
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
General Information
Inspection
7. Locate and verify any hot water generator (HWG), hanger,
or other accessory kit located in the compressor section or
blower section.
Upon receipt of the equipment, carefully check the shipment
against the bill of lading. Make sure all units have been received.
Inspect the packaging of each unit, and inspect each unit for
damage. Insure that the carrier makes proper notation of any
shortages or damage on all copies of the freight bill and completes
a common carrier inspection report. Concealed damage not
discovered during unloading must be reported to the carrier within
15 days of receipt of shipment. If not filed within 15 days, the
freight company can deny the claim without recourse. Note: It is the
responsibility of the purchaser to file all necessary claims with the
carrier. Notify your equipment supplier of all damage within fifteen
(15) days of shipment.
ꢀ CAUTION! ꢀ
CAUTION! DO NOT store or install units in corrosive
environments or in locations subject to temperature or
humidity extremes (e.g., attics, garages, rooftops, etc.).
Corrosive conditions and high temperature or humidity can
significantly reduce performance, reliability, and service
life. Always move and store units in an upright position.
Tilting units on their sides may cause equipment damage.
Storage
Equipment should be stored in its original packaging in a clean,
dry area. Store units in an upright position at all times. Stack units
a maximum of 3 units high.
ꢀ CAUTION! ꢀ
CAUTION! CUT HAZARD - Failure to follow this caution
may result in personal injury. Sheet metal parts may have
sharp edges or burrs. Use care and wear appropriate
protective clothing, safety glasses and gloves when
handling parts and servicing heat pumps.
Unit Protection
Cover units on the job site with either the original packaging or
an equivalent protective covering. Cap the open ends of pipes
stored on the job site. In areas where painting, plastering, and/
or spraying has not been completed, all due precautions must be
taken to avoid physical damage to the units and contamination
by foreign material. Physical damage and contamination may
prevent proper start-up and may result in costly equipment clean-
up.
Examine all pipes, fittings, and valves before installing any of the
system components. Remove any dirt or debris found in or on
these components.
Pre-Installation
Installation, Operation, and Maintenance instructions are
provided with each unit. Horizontal equipment is designed for
installation above false ceiling or in a ceiling plenum. Other unit
configurations are typically installed in a mechanical room. The
installation site chosen should include adequate service clearance
around the unit. Before unit start-up, read all manuals and
become familiar with the unit and its operation. Thoroughly check
the system before operation.
Prepare units for installation as follows:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the correct unit
has been shipped.
2. Keep the cabinet covered with the original packaging until
installation is complete and all plastering, painting, etc. is
finished.
3. Verify refrigerant tubing is free of kinks or dents and that it
does not touch other unit components.
4. Inspect all electrical connections. Connections must be clean
and tight at the terminals.
5. Remove any blower support packaging (water-to-air units
only).
6. Loosen compressor bolts on units equipped with compressor
grommet vibration isolation until the compressor rides freely
on the grommets.
4
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General Information
Mounting Horizontal Units
Horizontal Unit Location
Horizontal units have hanger kits pre-installed from the factory
as shown in Figure 1. Figure 3 shows a typical horizontal unit
installation.
Units are not designed for outdoor installation. Locate the unit in
an INDOOR area that allows enough space for service personnel
to perform typical maintenance or repairs without removing unit
from the ceiling. Horizontal units are typically installed above a
false ceiling or in a ceiling plenum. Never install units in areas
subject to freezing or where humidity levels could cause cabinet
condensation (such as unconditioned spaces subject to 100%
outside air). Consideration should be given to access for easy
removal of the filter and access panels. Provide sufficient room to
make water, electrical, and duct connection(s).
Horizontal heat pumps are typically suspended above a ceiling or
within a soffit using field supplied, threaded rods sized to support
the weight of the unit.
Use four (4) field supplied threaded rods and factory provided
vibration isolators to suspend the unit. Hang the unit clear of the
floor slab above and support the unit by the mounting bracket
assemblies only. DO NOT attach the unit flush with the floor slab
above.
If the unit is located in a confined space, such as a closet,
provisions must be made for return air to freely enter the space
by means of a louvered door, etc. Any access panel screws that
would be difficult to remove after the unit is installed should
be removed prior to setting the unit. Refer to Figure 3 for an
illustration of a typical installation. Refer to unit specifications
catalog for dimensional data.
Pitch the unit toward the drain as shown in Figure 2 to improve
the condensate drainage. On small units (less than 8.8kW) ensure
that unit pitch does not cause condensate leaks inside the
cabinet.
Conform to the following guidelines when selecting
unit location:
Figure 1: Hanger Bracket
1. Provide a hinged access door in concealed-spline or plaster
ceilings. Provide removable ceiling tiles in T-bar or lay-in
ceilings. Refer to horizontal unit dimensions for specific
series and model in unit specifications catalog. Size the
access opening to accommodate the service technician
during the removal or replacement of the compressor and
the removal or installation of the unit itself.
2. Provide access to hanger brackets, water valves and fittings.
Provide screwdriver clearance to access panels, discharge
collars and all electrical connections.
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3. DO NOT obstruct the space beneath the unit with piping,
electrical cables and other items that prohibit future removal
of components or the unit itself.
4. Use a manual portable jack/lift to lift and support the weight
of the unit during installation and servicing.
The installation of water source heat pump units and all
associated components, parts and accessories which make
up the installation shall be in accordance with the regulations
of ALL authorities having jurisdiction and MUST conform to
all applicable codes. It is the responsibility of the installing
contractor to determine and comply with ALL applicable codes
and regulations.
Figure 2: Horizontal Unit Pitch
1/4” (6.4mm) pitch
per foot for drainage
Drain
Connection
5
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Horizontal Installation
Figure 3: Typical Horizontal Unit Installation
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Air Coil - To obtain maximum performance, the air coil should be
cleaned before start-up. A 10% solution of dishwasher detergent
and water is recommended for both sides of the coil. A thorough
water rinse should follow.
6
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Field Conversion of Air Discharge
Overview - Horizontal units can be field converted between side
Figure 4: Left Return Side to Back
(straight) and back (end) discharge using the instructions below.
Remove Screws
Water
Connection End
Note: It is not possible to field convert return air between left or
right return models due to the necessity of refrigeration copper
piping changes.
Return Air
Preparation - It is best to field convert the unit on the ground
before hanging. If the unit is already hung it should be taken down
for the field conversion.
Side Discharge
Side to Back Discharge Conversion
1.
Place unit in well lit area. Remove the screws as shown in
Figure 4 to free top panel and discharge panel.
Lift out the access panel and set aside. Lift and rotate the
discharge panel to the other position as shown, being careful
with the blower wiring.
Water
Connection End
Rotate
2.
Return Air
3.
4.
5.
6.
7.
Check blower wire routing and connections for tension or
contact with sheet metal edges. Reroute if necessary.
Check refrigerant tubing for contact with
other components.
Reinstall top panel and screws noting that the location for
some screws will have changed.
Manually spin the fan wheel to ensure that the wheel is not
rubbing or obstructed.
Replace access panels.
Move to Side
Replace Screws
Water
Connection End
Back to Side Discharge Conversion - If the discharge is changed
from back to side, use above instruction noting that illustrations will
be reversed.
Return Air
Drain
Left vs. Right Return - It is not possible to field convert return air
between left or right return models due to the necessity of refrigera-
tion copper piping changes. However, the conversion process of
side to back or back to side discharge for either right or left return
configuration is the same. In some cases, it may be possible to
rotate the entire unit 180 degrees if the return air connection needs
to be on the opposite side. Note that rotating the unit will move the
piping to the other end of the unit.
Discharge Air
Back Discharge
Figure 5: Right Return Side to Back
Water
Connection End
Return Air
Supply Duct
Side Discharge
Water
Connection End
Return Air
Drain
Back Discharge
Discharge Air
7
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Installation, Operation & Maintenance
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Heat Controller, Inc.
Horizontal Installation
Condensate Piping
Figure 6: Horizontal Condensate Connection
Condensate Piping – Horizontal Units
Pitch the unit toward the drain as shown in Figure 2 to improve
the condensate drainage. On small units (less than 2.5 tons/8.8
kW), insure that unit pitch does not cause condensate leaks
inside the cabinet.
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Install condensate trap at each unit with the top of the trap
positioned below the unit condensate drain connection as shown
in Figure 6. Design the depth of the trap (water-seal) based
upon the amount of ESP capability of the blower (where 2 inches
[51mm] of ESP capability requires 2 inches [51mm] of trap depth).
As a general rule, 1-1/2 inch [38mm] trap depth is the minimum.
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* Some units include a painted drain connection.
Using a threaded pipe or similar device to clear
any excess paint accumulated inside this fitting
may ease final drain line installation.
Each unit must be installed with its own individual trap and
connection to the condensate line (main) or riser. Provide a
means to flush or blow out the condensate line. DO NOT install
units with a common trap and/or vent.
Always vent the condensate line when dirt or air can collect in
the line or a long horizontal drain line is required. Also vent when
large units are working against higher external static pressure
than other units connected to the same condensate main since
this may cause poor drainage for all units on the line. WHEN A
VENT IS INSTALLED IN THE DRAIN LINE, IT MUST BE LOCATED
AFTER THE TRAP IN THE DIRECTION OF THE CONDENSATE
FLOW.
ꢀ CAUTION! ꢀ
CAUTION! Ensure condensate line is pitched toward drain
1/8 inch per ft [11mm per m] of run.
DUCT SYSTEM INSTALLATION
Duct System Installation
At least one 90° elbow should be included in the supply duct to
reduce air noise. If air noise or excessive air flow is a problem,
the blower speed can be changed. For airflow charts, consult
specifications catalog for the series and model of the specific
unit.
The duct system should be sized to handle the design airflow
quietly. Refer to Figure 3 for horizontal duct system details or
figure 8 for vertical duct system details. A flexible connector is
recommended for both discharge and return air duct connections
on metal duct systems to eliminate the transfer of vibration to
the duct system. To maximize sound attenuation of the unit
blower, the supply and return plenums should include internal
fiberglass duct liner or be constructed from ductboard for the
first few feet. Application of the unit to uninsulated ductwork
in an unconditioned space is not recommended, as the unit’s
performance will be adversely affected.
If the unit is connected to existing ductwork, a previous check
should have been made to insure that the ductwork has the
capacity to handle the airflow required for the unit. If ducting is
too small, as in the replacement of a heating only system, larger
ductwork should be installed. All existing ductwork should be
checked for leaks and repaired as necessary.
8
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Installation, Operation & Maintenance
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Heat Controller, Inc.
Vertical Installation
Figure 7: Vertical Unit Mounting
Vertical Unit Location
Units are not designed for outdoor installation. Locate the unit in
an INDOOR area that allows enough space for service personnel
to perform typical maintenance or repairs without removing unit
from the mechanical room/closet. Vertical units are typically
installed in a mechanical room or closet. Never install units in
areas subject to freezing or where humidity levels could cause
cabinet condensation (such as unconditioned spaces subject to
100% outside air). Consideration should be given to access for
easy removal of the filter and access panels. Provide sufficient
room to make water, electrical, and duct connection(s).
If the unit is located in a confined space, such as a closet,
provisions must be made for return air to freely enter the space
by means of a louvered door, etc. Any access panel screws that
would be difficult to remove after the unit is installed should
be removed prior to setting the unit. Refer to Figures 7 and 8
for typical installation illustrations. Refer to unit specifications
catalog for dimensional data.
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1. Install the unit on a piece of rubber, neoprene or other
mounting pad material for sound isolation. The pad should
be at least 3/8” [10mm] to 1/2” [13mm] in thickness. Extend
the pad beyond all four edges of the unit.
2. Provide adequate clearance for filter replacement and drain
pan cleaning. Do not block filter access with piping, conduit
or other materials. Refer to unit specifications for dimensional
data.
3. Provide access for fan and fan motor maintenance and for
servicing the compressor and coils without removing the unit.
4. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of the unit, if necessary.
Figure 8: Typical Vertical Unit Installation Using Ducted
Return Air
Internally insulate supply
duct for first 1.2 m each way
to reduce noise
Use turning vanes in
supply transition
5. Provide access to water valves and fittings and screwdriver
access to the unit side panels, discharge collar and all
electrical connections.
Flexible canvas duct
connector to reduce
noise and vibration
Downflow units may be installed directly on the floor. The
optional internal electric heat is rated for zero clearance to
combustible materials.
Rounded return
transition
The installation of water source heat pump units and all
associated components, parts and accessories which make
up the installation shall be in accordance with the regulations
of ALL authorities having jurisdiction and MUST conform to
all applicable codes. It is the responsibility of the installing
contractor to determine and comply with ALL applicable codes
and regulations.
Rev.: 6/2/09S
Internally insulate return
transition duct to reduce
noise
9
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Installation, Operation & Maintenance
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Heat Controller, Inc.
Vertical Installation
Sound Attenuation for Vertical Units - Sound attenuation is
achieved by enclosing the unit within a small mechanical room
or a closet. Additional measures for sound control include the
following:
Condensate Piping for Vertical Units - Vertical units utilize a
condensate hose inside the cabinet as a trapping loop; therefore
an external trap is not necessary. Figure 10a shows typical
condensate connections. Figure 10b illustrates the internal trap
for a typical vertical heat pump. Each unit must be installed with
its own individual vent (where necessary) and a means to flush
or blow out the condensate drain line. Do not install units with a
common trap and/or vent.
1.
Mount the unit so that the return air inlet is 90° to the
return air grille. Refer to Figure 9. Install a sound baffle as
illustrated to reduce line-of sight sound transmitted through
return air grilles.
2.
Mount the unit on an Unit Isolation Pad to minimize vibration
transmission to the building structure. For more information on
Unit Isolation Pads, contact your distributor.
Figure 10a: Vertical Condensate Drain
Figure 9: Vertical Sound Attenuation
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Return
Air Inlet
* Some units include a painted drain connection.
Using a threaded pipe or similar device to clear
any excess paint accumulated inside this fitting
may ease final drain line installation.
Figure 10b: Vertical Internal Condensate Trap
10
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Installation, Operation & Maintenance
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Heat Controller, Inc.
Water Connection Installation
External Flow Controller Mounting
The female locking ring is threaded onto the pipe threads which
holds the male pipe end against the rubber gasket, and seals the
joint. HAND TIGHTEN ONLY! DO NOT OVERTIGHTEN!
The Flow Controller can be mounted beside the unit as shown
in Figure 12. Review the Flow Controller installation manual for
more details.
Figure 11: Water Connections
Water Connections-Residential (Distributor) Models
Residential models utilize swivel piping fittings for water
connections that are rated for 450 psi (3101 kPa) operating
pressure. The connections have a rubber gasket seal similar to a
garden hose gasket, which when mated to the flush end of most
1” threaded male pipe fittings provides a leak-free seal without
the need for thread sealing tape or joint compound. Check for
burrs and ensure that the rubber seal is in the swivel connector
prior to attempting any connection (rubber seals are shipped
attached to the swivel connector). DO NOT OVER TIGHTEN or
leaks may occur.
Swivel Nut
Hand Tighten
Only!
Do Not
Overtighten!
Stainless steel
snap ring
Gasket
Brass Adaptor
GROUND-LOOP HEAT PUMP APPLICATIONS
Figure 12: Typical Ground-Loop Application
Pre-Installation
Prior to installation, locate and mark all existing underground
utilities, piping, etc. Install loops for new construction before
sidewalks, patios, driveways, and other construction has begun.
During construction, accurately mark all ground loop piping on
the plot plan as an aid in avoiding potential future damage to the
installation.
To Thermostat
Piping Installation
The typical closed loop ground source system is shown in Figure
12. All earth loop piping materials should be limited to polyethylene
fusion only for in-ground sections of the loop. Galvanized or steel
fittings should not be used at any time due to their tendency to
corrode. All plastic to metal threaded fittings should be avoided due
to their potential to leak in earth coupled applications. A flanged
fitting should be substituted. P/T plugs should be used so that
flow can be measured using the pressure drop of the unit heat
exchanger.
High and
Low Voltage
Knockouts
Vibration Isolation Pad
Earth loop temperatures can range between 25 and 110°F [-4
to 43°C]. Flow rates between 2.25 and 3 gpm per ton [2.41 to
3.23 l/m per kW] of cooling capacity is recommended in these
applications.
ꢀ CAUTION! ꢀ
Test individual horizontal loop circuits before backfilling. Test
vertical U-bends and pond loop assemblies prior to installation.
Pressures of at least 100 psi [689 kPa] should be used when
testing. Do not exceed the pipe pressure rating. Test entire
system when all loops are assembled.
CAUTION! The following instructions represent industry
accepted installation practices for closed loop earth coupled
heat pump systems. Instructions are provided to assist the
contractor in installing trouble free ground loops. These
instructions are recommendations only. State/provincial
and local codes MUST be followed and installation MUST
conform to ALL applicable codes. It is the responsibility of
the installing contractor to determine and comply with ALL
applicable codes and regulations.
Flushing the Earth Loop
Once piping is completed between the unit, Flow Controller and
the ground loop (Figure 12), the loop is ready for final purging
and charging. A flush cart with at least a 1.5 hp [1.1 kW] pump is
required to achieve enough fluid velocity in the loop piping system
to purge air and dirt particles. An antifreeze solution is used in
11
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HTV/HTD/HTH SERIES
Heat Controller, Inc.
Ground-Loop Heat Pump Applications
most areas to prevent freezing. All air and debris must be removed
from the earth loop piping before operation. Flush the loop with a
high volume of water at a minimum velocity of 2 fps (0.6 m/s) in all
piping. The steps below must be followed for proper flushing.
1. Fill loop with water from a garden hose through the flush cart
before using the flush cart pump to insure an even fill.
2. Once full, the flushing process can begin. Do not allow the
water level in the flush cart tank to drop below the pump inlet
line to avoid air being pumped back out to the earth loop.
3. Try to maintain a fluid level in the tank above the return tee
so that air cannot be continuously mixed back into the fluid.
Surges of 50 psi (345 kPa) can be used to help purge air
pockets by simply shutting off the return valve going into the
flush cart reservoir. This “dead heads” the pump to 50 psi (345
kPa). To purge, dead head the pump until maximum pumping
pressure is reached. Open the return valve and a pressure
surge will be sent through the loop to help purge air pockets
from the piping system.
4. Notice the drop in fluid level in the flush cart tank when the
return valve is shut off. If air is adequately purged from the
system, the level will drop only 1-2 inches (2.5 - 5 cm) in a
10” (25 cm) diameter PVC flush tank (about a half gallon [2.3
liters]), since liquids are incompressible. If the level drops
more than this, flushing should continue since air is still
being compressed in the loop fluid. Perform the “dead head”
procedure a number of times. Note: This fluid level drop is
your only indication of air in the loop.
Low temperature protection should be maintained to 15°F [9°C]
below the lowest expected entering loop temperature. For
example, if 30°F [-1°C] is the minimum expected entering loop
temperature, the leaving loop temperature would be 25 to 22°F
[-4 to -6°C] and low temperature protection should be at 15°F
[-10°C]. Calculation is as follows:
30°F - 15°F = 15°F [-1°C - 9°C = -10°C].
All alcohols should be premixed and pumped from a reservoir
outside of the building when possible or introduced under the
water level to prevent fumes. Calculate the total volume of
fluid in the piping system. Then use the percentage by volume
shown in Table 2 for the amount of antifreeze needed. Antifreeze
concentration should be checked from a well mixed sample
using a hydrometer to measure specific gravity.
Low Water Temperature Cutout Setting - CXM Control
When antifreeze is selected, the FP1 jumper (JW3) should be
clipped to select the low temperature (antifreeze 10°F [-12.2°C])
set point and avoid nuisance faults (see “Low Water Temperature
Cutout Selection” in this manual). Note: Low water temperature
operation requires extended range equipment.
Table 1: Approximate Fluid Volume (gal.) per 100' of Pipe
Fluid Volume (gal [liters] per 100’ [30 meters) Pipe)
Pipe
Size
1”
Volume (gal) [liters]
4.1 [15.3]
Antifreeze may be added before, during or after the flushing
procedure. However, depending upon which time is chosen,
antifreeze could be wasted when emptying the flush cart tank.
See antifreeze section for more details.
Copper
1.25”
6.4 [23.8]
2.5”
9.2 [34.3]
Rubber Hose
1”
3.9 [14.6]
3/4” IPS SDR11
1” iPS SDR11
1.25” IPS SDR11
1.5” IPS SDR11
2” IPS SDR11
1.25” IPS SCH40
1.5” IPS SCH40
2” IPS SCH40
Typical
2.8 [10.4]
Loop static pressure will fluctuate with the seasons. Pressures
will be higher in the winter months than during the cooling
season. This fluctuation is normal and should be considered
when charging the system initially. Run the unit in either heating
or cooling for a number of minutes to condition the loop to a
homogenous temperature. This is a good time for tool cleanup,
piping insulation, etc. Then, perform final flush and pressurize
the loop to a static pressure of 50-75 psi [345-517 kPa] (winter)
or 35-40 psi [241-276 kPa] (summer). After pressurization, be
sure to loosen the plug at the end of the Grundfos loop pump
motor(s) to allow trapped air to be discharged and to insure the
motor housing has been flooded. This is not required for Taco
circulators. Insure that the Flow Controller provides adequate
flow through the unit by checking pressure drop across the heat
exchanger and compare to the pressure drop tables at the back
of the manual.
4.5 [16.7]
8.0 [29.8]
10.9 [40.7]
18.0 [67.0]
8.3 [30.9]
Polyethylene
10.9 [40.7]
17.0 [63.4]
1.0 [3.8]
Unit Heat Exchanger
Flush Cart Tank
10” Dia x 3ft tall
[254mm x 91.4cm tall]
10 [37.9]
Antifreeze
In areas where minimum entering loop temperatures drop below
40°F [5°C] or where piping will be routed through areas subject
to freezing, antifreeze is required. Alcohols and glycols are
commonly used as antifreeze; however your local sales manager
should be consulted for the antifreeze best suited to your area.
12
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Ground-Loop Heat Pump Applications
Table 2: Antifreeze Percentages by Volume
Minimum Temperature
for Low Temperature Protection
Type
10°F
15°F
20°F
25°F
[-12.2°C] [-9.4°C]
[-6.7°C]
[-3.9°C]
Methanol
Propylene Glycol
Ethanol*
21%
29%
23%
17%
24%
20%
13%
18%
16%
8%
12%
11%
* Must not be denatured with any petroleum based product
GROUND-WATER HEAT PUMP APPLICATIONS
Open Loop - Ground Water Systems
Pressure Tank and Pump
Typical open loop piping is shown in Figure 13. Shut off valves
should be included for ease of servicing. Boiler drains or other
valves should be “tee’d” into the lines to allow acid flushing of the
heat exchanger. Shut off valves should be positioned to allow flow
Use a closed, bladder-type pressure tank to minimize mineral
formation due to air exposure. The pressure tank should be
sized to provide at least one minute continuous run time of the
pump using its drawdown capacity rating to prevent pump short
through the coax via the boiler drains without allowing flow into the cycling. Discharge water from the unit is not contaminated in any
piping system. P/T plugs should be used so that pressure drop
and temperature can be measured. Piping materials should be
limited to copper or PVC SCH80. Note: Due to the pressure and
temperature extremes, PVC SCH40 is not recommended.
manner and can be disposed of in various ways, depending on
local building codes (e.g. recharge well, storm sewer, drain field,
adjacent stream or pond, etc.). Most local codes forbid the use
of sanitary sewer for disposal. Consult your local building and
zoning department to assure compliance in your area.
The pump should be sized to handle the home’s domestic water
load (typically 5-9 gpm [23-41 l/m]) plus the flow rate required
for the heat pump. Pump sizing and expansion tank must be
chosen as complimentary items. For example, an expansion
tank that is too small can causing premature pump failure due
to short cycling. Variable speed pumping applications should be
considered for the inherent energy savings and smaller pressure
tank requirements.
Water quantity should be plentiful and of good quality. Consult
table 3 for water quality guidelines. The unit can be ordered with
either a copper or cupro-nickel water heat exchanger. Consult
table 3 for recommendations. Copper is recommended for
closed loop systems and open loop ground water systems that
are not high in mineral content or corrosiveness. In conditions
anticipating heavy scale formation or in brackish water, a cupro-
nickel heat exchanger is recommended. In ground water situations
where scaling could be heavy or where biological growth such
as iron bacteria will be present, an open loop system is not
recommended. Heat exchanger coils may over time lose heat
exchange capabilities due to build up of mineral deposits. Heat
exchangers must only be serviced by a qualified technician, as
acid and special pumping equipment is required. Desuperheater
coils can likewise become scaled and possibly plugged. In areas
with extremely hard water, the owner should be informed that the
heat exchanger may require occasional acid flushing. In some
cases, the desuperheater option should not be recommended due
to hard water conditions and additional maintenance required.
Water Control Valve
Note the placement of the water control valve in figure 13. Always
maintain water pressure in the heat exchanger by placing the
water control valve(s) on the discharge line to prevent mineral
precipitation during the off-cycle. Pilot operated slow closing
valves are recommended to reduce water hammer. If water
hammer persists, a mini-expansion tank can be mounted on the
piping to help absorb the excess hammer shock. Insure that the
total ‘VA’ draw of the valve can be supplied by the unit transformer.
For instance, a slow closing valve can draw up to 35VA. This
can overload smaller 40 or 50 VA transformers depending on the
other controls in the circuit. A typical pilot operated solenoid valve
draws approximately 15VA (see Figure 22). Note the special wiring
diagrams for slow closing valves (Figures 23 & 24).
Water Quality Standards
Table 3 should be consulted for water quality requirements.
Scaling potential should be assessed using the pH/Calcium
hardness method. If the pH <7.5 and the Calcium hardness is
less than 100 ppm, scaling potential is low. If this method yields
numbers out of range of those listed, the Ryznar Stability and
Langelier Saturation indecies should be calculated. Use the
appropriate scaling surface temperature for the application,
150°F [66°C] for direct use (well water/open loop) and DHW
(desuperheater); 90°F [32°F] for indirect use. A monitoring plan
should be implemented in these probable scaling situations. Other
water quality issues such as iron fouling, corrosion prevention and
erosion and clogging should be referenced in Table 3.
Flow Regulation
Flow regulation can be accomplished by two methods. One method
of flow regulation involves simply adjusting the ball valve or water
control valve on the discharge line. Measure the pressure drop
through the unit heat exchanger, and determine flow rate from
tables 9a through 9c. Since the pressure is constantly varying, two
pressure gauges may be needed. Adjust the valve until the desired
flow of 1.5 to 2 gpm per ton [2.0 to 2.6 l/m per kW] is achieved.
A second method of flow control requires a flow control device
13
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Ground-Water Heat Pump Applications
mounted on the outlet of the water control valve. The device is
typically a brass fitting with an orifice of rubber or plastic material
that is designed to allow a specified flow rate. On occasion, flow
control devices may produce velocity noise that can be reduced
by applying some back pressure from the ball valve located on the
discharge line. Slightly closing the valve will spread the pressure
drop over both devices, lessening the velocity noise. NOTE: When
EWT is below 50°F [10°C], a minimum of 2 gpm per ton (2.6 l/m
per kW) is required.
ꢀ CAUTION! ꢀ
CAUTION! Refrigerant pressure activated water regulating
valves should never be used with this equipment.
Water Coil Low Temperature Limit Setting
For all open loop systems the 30°F [-1.1°C] FP1 setting (factory
setting-water) should be used to avoid freeze damage to the unit.
See “Low Water Temperature Cutout Selection” in this manual for
details on the low limit setting.
Figure 13: Typical Open Loop/Well Application
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14
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Water Quality Standards
Table 3: Water Quality Standards
Water Quality
Parameter
HX
Material
Closed
Recirculating
Open Loop and Recirculating Well
Scaling Potential - Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below
pH/Calcium Hardness
Method
-
All
pH < 7.5 and Ca Hardness <100ppm
Index Limits for Probable Scaling Situations - (Operation outside these limits is not recommended)
Scaling indexes should be calculated at 66°C for direct use and HWG applications, and at 32°C for indirect HX use.
A monitoring plan should be implemented.
Ryznar
Stability Index
-
6.0 - 7.5
If >7.5 minimize steel pipe use.
All
All
-
-0.5 to +0.5
Langelier
Saturation Index
If <-0.5 minimize steel pipe use. Based upon 66°C HWG and
Direct well, 29°C Indirect Well HX
Iron Fouling
Iron Fe (Ferrous)
2+
-
-
<0.2 ppm (Ferrous)
If Fe2+ (ferrous)>0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.
All
All
(Bacterial Iron potential)
<0.5 ppm of Oxygen
Above this level deposition will occur.
Iron Fouling
Corrosion Prevention
6 - 8.5
6 - 8.5
pH
All
All
Monitor/treat as
needed
Minimize steel pipe below 7 and no open tanks with pH <8
-
<0.5 ppm
At H S>0.2 ppm, avoid use of copper and copper nickel piping or HX's.
2
Hydrogen Sulfide (H S)
2
Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are OK to <0.5 ppm.
Ammonia ion as hydroxide, chloride,
nitrate and sulfate compounds
-
<0.5 ppm
All
Maximum Allowable at maximum water temperature.
10$C
<20ppm
24$C
NR
38 C
NR
Copper
Cupronickel
-
-
-
-
-
Maximum
<150 ppm
<400 ppm
<1000 ppm
>1000 ppm
NR
NR
Chloride Levels
304 S
316 S
S
S
<250 ppm
<550 ppm
>550 ppm
<150 ppm
< 375 ppm
>375 ppm
Titanium
All
Erosion and Clogging
<10 ppm of particles
and a maximum
velocity of 1.8 m/s
Filtered for maximum
841 micron [0.84 mm,
20 mesh] size.
<10 ppm (<1 ppm "sandfree” for reinjection) of particles and a maximum
velocity of 1.8 m/s. Filtered for maximum 841 micron 0.84 mm,
20 mesh] size. Any particulate that is not removed can potentially
clog components.
Particulate Size and
Erosion
Rev.: 3/22/2012
Manufacturer
The Water Quality Table provides water quality requirements for Manufacturercoaxial heat exchangers. When water properties are outside of those
requirements, an external secondary heat exchanger must be used to isolate the heat pump heat exchanger from the unsuitable water. Failure to do so will void the
warranty for the coaxial heat exchanger.
Notes:
‡ꢀ&ORVHGꢀ5HFLUFXODWLQJꢀV\VWHPꢀLVꢀLGHQWLILHGꢀE\ꢀDꢀclosed pressurized piping system.
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‡ꢀ15ꢀꢁꢀApplication not recommended.
‡ꢀꢂꢁꢂꢀ1RꢀGHVLJQꢀ0D[LPXPꢃ
15
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Hot Water Generator
The HWG (Hot Water Generator) or desuperheater option
provides considerable operating cost savings by utilizing excess
heat energy from the heat pump to help satisfy domestic hot
water requirements. The HWG is active throughout the year,
providing virtually free hot water when the heat pump operates
in the cooling mode or hot water at the COP of the heat pump
during operation in the heating mode. Actual HWG water
heating capacities are provided in the appropriate heat pump
performance data.
Electric water heaters are recommended. If a gas, propane, or
oil water heater is used, a second preheat tank must be installed
(Figure 15). If the electric water heater has only a single center
element, the dual tank system is recommended to insure a usable
entering water temperature for the HWG.
Typically a single tank of at least 52 gallons (235 liters) is used to
limit installation costs and space. However, a dual tank, as shown
in Figure 15, is the most efficient system, providing the maximum
storage and temperate source water to the HWG.
Heat pumps equipped with the HWG option include a built-in
water to refrigerant heat exchanger that eliminates the need to
tie into the heat pump refrigerant circuit in the field. The control
circuit and pump are also built in for residential equipment. Figure
14 shows a typical example of HWG water piping connections on
a unit with built-in circulating pump. This piping layout reduces
scaling potential.
It is always advisable to use water softening equipment on
domestic water systems to reduce the scaling potential and
lengthen equipment life. In extreme water conditions, it may be
necessary to avoid the use of the HWG option since the potential
cost of frequent maintenance may offset or exceed any savings.
Consult Table 3 for scaling potential tests.
The temperature set point of the HWG is field selectable to 125°F
or 150°F . The 150°F set point allows more heat storage from
the HWG. For example, consider the amount of heat that can be
generated by the HWG when using the 125°F set point, versus
the amount of heat that can be generated by the HWG when
using the 150°F set point.
Figure 14: Typical HWG Installation
Cold
Inlet
Hot Outlet
to home
Shut Off
Valve #1
Shut Off
Valve #4
Upper
In a typical 50 gallon two-element electric water heater the lower
element should be turned down to 100°F, or the lowest setting,
to get the most from the HWG. The tank will eventually stratify
so that the lower 80% of the tank, or 40 gallons, becomes 100°F
(controlled by the lower element). The upper 20% of the tank, or
10 gallons, will be maintained at 125°F (controlled by the upper
element).
element to
120 - 130°F
[49 - 54°C]
Lower
element to
Powered
Water
Heater
100 - 110°F
[38 - 43°C]
Shut-off
Valve #3
Using a 125°F set point, the HWG can heat the lower 40 gallons
of water from 100°F to 125°F, providing up to 8,330 btu’s of heat.
Using the 150°F set point, the HWG can heat the same 40 gallons
of water from 100°F to 150°F and the remaining 10 gallons of
water from 125°F to 150°F, providing a total of up to 18,743 btu’s
of heat, or more than twice as much heat as when using the
125°F set point.
Shut Off
Valve #2
Field supplied 3/4’ brass nipple and ‘T’
Insulated water lines -
5/8” OD, 50 ft maximum (one way)
[16mm OD, 15 meters maximum]
Figure 15: HWG Double Tank Installation
This example ignored standby losses of the tank. When those
losses are considered the additional savings are even greater.
Hot Outlet to
house
Cold Inlet
Cold Inlet from
Domestic supply
Hot Outlet
Upper element to 130°F [54°C]
(or owner preference)
Shut-off
ꢀ WARNING! ꢀ
Valve #1
Shut-off
WARNING! A 150°F SETPOINT MAY LEAD TO
SCALDING OR BURNS. THE 150°F SET POINT MUST
ONLY BE USED ON SYSTEMS THAT EMPLOY AN
APPROVED ANTI-SCALD VALVE.
Valve #4
Powered
Water Heater
Lower element to 120°F [49°C]
Unpowered
Water Heater
Shut-off
Valve #3
Shut Off
Valve #2
Field Supplied 3/4” brass nipple and “T”
Insulated water lines - 5/8” OD, 50 ft maximum (one way)
[16mm OD, 15 meters maximum]
16
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Hot Water Generator
ANTI-SCALD
VALVE PIPING
CONNECTIONS
Installation
COLD WATER
SUPPLY
The HWG is controlled by two sensors and a microprocessor
control. One sensor is located on the compressor discharge
line to sense the discharge refrigerant temperature. The
other sensor is located on the HWG heat exchanger’s “Water
In” line to sense the potable water temperature.
CHECK VALVE
ANTI-SCALD
VALVE
ѥꢀWARNING! ѥ
C
WARNING! UNDER NO CIRCUMSTANCES SHOULD
THE SENSORS BE DISCONNECTED OR REMOVED
AS FULL LOAD CONDITIONS CAN DRIVE HOT
WATER TANK TEMPERATURES FAR ABOVE SAFE
TEMPERATURE LEVELS IF SENSORS HAVE BEEN
DISCONNECTED OR REMOVED.
HOT WATER
TO HOUSE
M
H
The microprocessor control monitors the refrigerant and
water temperatures to determine when to operate the HWG.
The HWG will operate any time the refrigerant temperature
is sufÄciently above the water temperature. Once the
HWG has satisÄed the water heating demand during a
heat pump run cycle, the controller will cycle the pump at
regular Intervals to determine if an additional HWG cycle
can be utilized. The microprocessor control Includes 3 DIP
switches, SW10 (HWG PUMP TEST), SW11 (HWG TEMP),
and SW12 (HWG STATUS).
WATER HEATER
SW10 HWG PUMP TEST. When this switch is in the “ON”
position, the HWG pump is forced to operate even if there
is no call for the HWG. This mode may be beneÄcial to
assist in purging the system of air during Initial start up.
When SW10 is in the “OFF” position, the HWG will operate
normally. This switch is shipped from the factory in the
“OFF” (normal) position. NOTE; If left in the “On” position for
5 minutes, the pump control will revert to normal operation.
125°F. This switch Is shipped from the factory in the “OFF”
(125°F) position.
SW12 HWG STATUS. This switch controls operation of
the HWG. When SW12 is in the “ON” position the HWG is
disabled and will not operate. When SW12 is in the “OFF”
position the HWG is in the enabled mode and will operate
normally. This switch is shipped from the factory in the
“ON” (disabled) position. CAUTION: DO NOT PLACE THIS
SWITCH IN THE ENABLED POSITION UNITL THE HWG
PIPING IS CONNECTED, FILLED WITH WATER, AND
PURGED OR PUMP DAMAGE WILL OCCUR.
SW11 HWG TEMP. The control setpoint of the HWG can
be set to either of two temperatures, 125°F or 150°F. When
SW11 is in the “ON” position the HWG setpoint is 150°F.
When SW11 is in the “OFF” position the HWG setpoint is
When the control is powered and the HWG pump output
is not active, the status LED (AN1) will be “On”. When the
HWG pump output is active for water temperature sampling
or HWG operation, the status LED will slowly Åash (On 1
second, Off 1 second).
ѥꢀWARNING! ѥ
WARNING! USING A 150°F SETPOINT ON THE
HWG WILL RESULT IN WATER TEMPERATURES
SUFFICIENT TO CAUSE SEVERE PHYSICAL INJURY
IN THE FORM OF SCALDING OR BURNS, EVEN
WHEN THE HOT WATER TANK TEMPERATURE
SETTING IS VISIBLY SET BELOW 150°F. THE 150°F
HWG SETPOINT MUST ONLY BE USED ON SYSTEMS
THAT EMPLOY AN APPROVED ANTI-SCALD VALVE
(PART NUMBER AVAS4) AT THE HOT WATER
STORAGE TANK WITH SUCH VALVE PROPERLY
SET TO CONTROL WATER TEMPERATURES
DISTRIBUTED TO ALL HOT WATER OUTLETS AT A
TEMPERATURE LEVEL THAT PREVENTS SCALDING
OR BURNS!
If the control has detected a fault, the status LED will Åash a
numeric fault code as follows:
Hot Water Sensor Fault
1 Åash
Compressor Discharge sensor fault
High Water Temperature (>160ºF)
Control Logic Error
2 Åashes
3 Åashes
4 Åashes
Fault code Åashes have a duration of 0.4 seconds with
a 3 second pause between fault codes. For example, a
“Compressor Discharge sensor fault” will be four Åashes
0.4 seconds long, then a 3 second pause, then four Åashes
again, etc.
17
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Hot Water Generator
insure maximum utilization of the heat available from the
Warning! The HWG pump Is fully wired from the factory. Use
extreme caution when working around the microprocessor
control as it contains line voltage connections that presents
a shock hazard that can cause severe injury or death!
refrigeration system and conserve the most energy. On tanks
with both upper and lower elements and thermostats, the
lower element should be turned down to 100°F [38°C] or
the lowest setting; the upper element should be adjusted to
120-130°F [49-54°C]. Depending upon the specific needs
of the customer, you may want to adjust the upper element
differently. On tanks with a single thermostat, a preheat tank
should be used (Fig 15).
The heat pump, water piping, pump, and hot water tank should
be located where the ambient temperature does not fall below
50°F [10°C]. Keep water piping lengths at a minimum. DO NOT
use a one way length greater than 50 ft. (one way) [15 m]. See
Table 7 for recommended piping sizes and maximum lengths.
6. Replace access cover(s) and restore power or
fuel supply.
All installations must be in accordance with local codes. The
installer is responsible for knowing the local requirements, and
for performing the installation accordingly. DO NOT connect the
pump wiring until “Initial Start-Up” section, below. Powering the
pump before all installation steps are completed may damage the
pump.
Initial Start-Up
1. Make sure all valves in the HWG water circuit are
fully open.
2. Turn on the heat pump and allow it to run for
10-15 minutes.
3. Set SW12 to the “OFF” position (enabled) to engage the
HWG.
Water Tank Preparation
4. The HWG pump should not run if the compressor is not
running.
5. The temperature difference between the water entering and
leaving the HWG coil should be approximately 5-10°F [3-
6°C].
1. Turn off power or fuel supply to the hot water tank.
2. Connect a hose to the drain valve on the water tank.
3. Shut off the cold water supply to the water tank.
4. Open the drain valve and open the pressure relief valve or a
hot water faucet to drain tank.
6. Allow the unit to operate for 20 to 30 minutes to insure that it
is functioning properly.
5. When using an existing tank, it should be flushed with cold
water after it is drained until the water leaving the drain hose
is clear and free of sediment.
6. Close all valves and remove the drain hose.
7. Install HWG water piping.
HWG Water Piping
Table 7: HWG Water Piping Sizes and Length
1. Using at least 5/8” [16mm] O.D. copper, route and install the
water piping and valves as shown in Figures 14 or 15. Install
an approved anti-scald valve if the 150°F HWG setpoint is or
will be selected. An appropriate method must be employed
to purge air from the HWG piping. This may be accomplished
by flushing water through the HWG (as In Figures 14 and
15) or by Installing an air vent at the high point of the HWG
piping system.
2. Insulate all HWG water piping with no less than 3/8” [10mm]
wall closed cell insulation.
3. Open both shut off valves and make sure the tank drain valve
is closed.
Unit
Nominal
1/2" Copper
(max length*) (max length*)
3/4" Copper
Nominal HWG Flow
Tonnage
1.5
(gpm)
0.6
50
50
50
50
50
45
25
10
-
-
2.0
0.8
2.5
1.0
-
3.0
1.2
-
3.5
1.4
-
4.0
1.6
50
50
50
5.0
2.0
6.0
2.4
Water Tank Refill
1. Close valve #4. Ensure that the HWG valves (valves #2 and
#3) are open. Open the cold water supply (valve #1) to fill the
tank through the HWG piping. This will purge air from the
HWG piping.
*Maximum length is equivalent length (in feet) one way of type L copper.
2. Open a hot water faucet to vent air from the system until
water flows from faucet; turn off faucet. Open valve #4.
3. Depress the hot water tank pressure relief valve handle to
ensure that there is no air remaining in the tank.
4. Inspect all work for leaks.
5. Before restoring power or fuel supply to the water heater,
adjust the temperature setting on the tank thermostat(s) to
18
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Electrical - Line Voltage
ꢀ WARNING! ꢀ
ꢀ CAUTION! ꢀ
WARNING! To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and secure it
in an open position during installation.
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept other
types of conductors.
Table 4a: HT Series Electrical Data
All HTUnits with Emerson ECM Fan Motor
HT Units (ECM) Standard
Ext
Max
Compressor
HWG
Pump
FLA
Fan
Motor
FLA
Total
Unit
FLA
Min
Circuit
Amps
Loop
Pump
FLA
Fuse/
HACR
(2)
Model
RLA
LRA
Qty
11.7
15.3
58.3
83.0
1
1
1
1
1
0.5
0.5
0.5
0.5
0.5
1.7
1.7
1.7
1.7
1.7
3.9
3.9
6.9
6.9
6.9
16.1
19.7
28.6
34.5
37.1
19.0
23.5
33.9
41.2
44.5
30
35
50
60
70
024
036
048
21.2 104.0
27.1 152.9
29.7 179.2
060
070
Rated Voltage of 208-230/60/1
HACR circuit breaker in USA only
Min/Max Voltage of 197/254
All fuses Class RK-5
19
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Electrical - Line Voltage
Figure 16: HT Single Phase Line Voltage
Field Wiring
ꢀ WARNING! ꢀ
WARNING! Disconnect electrical power source to prevent
injury or death from electrical shock.
ꢀ CAUTION! ꢀ
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
Electrical - Line Voltage
All field installed wiring, including electrical ground, must comply
with the National Electrical Code as well as all applicable local
codes. Refer to the unit electrical data for fuse sizes. Consult
wiring diagram for field connections that must be made by the
installing (or electrical) contractor.
All final electrical connections must be made with a length of
flexible conduit to minimize vibration and sound transmission to
the building.
General Line Voltage Wiring
Unit Power Supply
(see electrical table for wire
and breaker size)
Be sure the available power is the same voltage and phase shown
on the unit serial plate. Line and low voltage wiring must be done
in accordance with local codes or the National Electric Code,
whichever is applicable.
Special Note for AHRI Testing: To achieve rated airflow for
AHRI testing purposes on all PSC products, it is necessary to
change the fan speed to “HI” speed. When the heat pump has
experienced less than 100 operational hours and the coil has
not had sufficient time to be “seasoned”, it is necessary to clean
the coil with a mild surfactant such as Calgon to remove the oils
left by manufacturing processes and enable the condensate to
properly “sheet” off of the coil.
Power Connection
Line voltage connection is made by connecting the incoming line
voltage wires to the “L” side of the contactor as shown in Figure
16. Consult Tables 4a through 4b for correct fuse size.
208 Volt Operation
All residential 208-230 Volt units are factory wired for 230 Volt
operation. The transformer may be switched to the 208V tap as
illustrated on the wiring diagram by switching the red (208V) and
the orange (230V) wires at the contactor terminal.
Figure 17: PSC Motor Speed Selection
Connect the blue wire to:
H for High speed fan
M for Medium speed fan
L for Low speed fan
Blower Speed Selection – Units with PSC Motor
PSC (Permanent Split Capacitor) blower fan speed can be
changed by moving the blue wire on the fan motor terminal
block to the desired speed as shown in Figure 17. Optional ECM
motor speeds are set via low voltage controls (see “ECM Blower
Control”). Most units are shipped on the medium speed tap.
Consult specifications catalog for specific unit airflow tables.
Typical unit design delivers rated airflow at nominal static (0.15 in.
w.g. [37Pa]) on medium speed and rated airflow at a higher static
(0.4 to 0.5 in. w.g. [100 to 125 Pa]) on high speed for applications
where higher static is required. Low speed will deliver
Medium is factory setting
Fan Motor
HWG Wiring (Split Units Only)
The hot water generator pump power wiring is disabled at the
factory to prevent operating the HWG pump “dry.” After all HWG
piping is completed and air purged from the water piping, the
pump power wires should be applied to terminals on the HWG
power block PB2 as shown in the unit wiring diagram. This
connection can also serve as a HWG disable when servicing the
unit.
approximately 85% of rated airflow at 0.10 in. w.g. [25 Pa].
20
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Electrical - Low Voltage Wiring
Thermostat Connections
Low Water Temperature Cutout Selection
The thermostat should be wired directly to the CXM board
(units with PSC fan). Units with optional ECM motor include
factory wiring from the CXM board to the ECM interface
board. Thermostat wiring for these units should be connected
to the ECM interface board. Figure 18 shows wiring for
The CXM control allows the Äeld selection of low water (or
water-antifreeze solution) temperature limit by clipping jumper
JW3, which changes the sensing temperature associated with
thermistor FP1. Note that the FP1 thermistor is located on
the refrigerant line between the coaxial heat exchanger and
expansion device (TXV). Therefore, FP1 is sensing refrigerant
temperature, not water temperature, which is a better indication
of how water Åow rate/temperature is affecting the refrigeration
circuit.
units with PSC or optional ECM motor. See “Electrical –
HT
Thermostat” for speciÄc terminal connections.
Figure 18:
HT Low Voltage Field Wiring
The factory setting for FP1 is for systems using water (30°F
[-1.1°C] refrigerant temperature). In low water temperature
(extended range) applications with antifreeze (most ground
loops), jumper JW3 should be clipped as shown in Figure
19 to change the setting to 10°F [-12.2°C] refrigerant
temperature, a more suitable temperature when using
an antifreeze solution. All residential units include water/
refrigerant circuit insulation to prevent internal condensation,
which is required when operating with entering water
temperatures below 59°F [15°C].
Low voltage
Äeld wiring
for units with
PSC FAN
(ECM board
will not be
present)
Figure 19: FP1 Limit Setting
Low voltage Äeld wiring for units with ECM fan
JW3-FP1
jumper should
be clipped for
low temperature
operation
CXM PCB
21
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Electrical - Low Voltage Wiring
Accessory Connections
Figure 23 illustrates piping for two-stage solenoid valves. Review
figures 20-22 for wiring of stage one valve. Stage two valve should
be wired between terminal “Y2” (ECM board) and terminal “C.”
A terminal paralleling the compressor contactor coil has been
provided on the CXM control. Terminal “A” is designed to control
accessory devices, such as water valves. Note: This terminal
should be used only with 24 Volt signals and not line voltage.
Terminal “A” is energized with the compressor contactor. See
Figure 20 or the specific unit wiring diagram for details.
Note: When EWT is below 50°F [10°C], a minimum of 2 gpm per
ton (2.6 l/m per kW) is required.
Figure 21: AVM Valve Wiring
Figure 20: Accessory Wiring
2
AVM
Taco Valve
3
1
Heater Switch
Water Solenoid Valves
An external solenoid valve(s) should be used on ground water
installations to shut off flow to the unit when the compressor
is not operating. A slow closing valve may be required to help
reduce water hammer. Figure 20 shows typical wiring for a
24VAC external solenoid valve. Figures 21 and 22 illustrate
typical slow closing water control valve wiring for Taco 500 series
(Manufacturer P/N AVM...) and Taco SBV series valves. Slow
closing valves take approximately 60 seconds to open (very little
water will flow before 45 seconds). Once fully open, an end switch
allows the compressor to be energized. Only relay or triac based
electronic thermostats should be used with slow closing valves.
When wired as shown, the slow closing valve will operate properly
with the following notations:
Thermostat
Figure 22: Taco SBV Valve Wiring
1. The valve will remain open during a unit lockout.
2. The valve will draw approximately 25-35 VA through the “Y”
signal of the thermostat. Note: This valve can overheat the
anticipator of an electromechanical thermostat. Therefore,
only relay or triac based thermostats should be used.
Two-stage Units
Figure 23: Two-Stage Piping
HT two-stage units should be designed with two parallel valves
for ground water applications to limit water use during first stage
operation. For example, at 1.5 gpm/ ton [2.0 l/m per kW], a 048
unit requires 6 gpm [23 l/m] for full load (2nd stage) operation,
but only 4 gpm [15 l/m] during 1st stage operation. Since the unit
will operate on first stage 80-90% of the time, significant water
savings can be realized by using two parallel solenoid valves with
two flow regulators. In the example above, stage one solenoid
would be installed with a 4 gpm [15 l/m] flow regulator on the
outlet, while stage two would utilize a 2 gpm [8 l/m] flow regulator.
When stage one is operating, the second solenoid valve will be
closed. When stage two is operating, both valves will be open,
allowing full load flow rate.
Solenoid
Valve
Flow
Regulator
Stage 2
To Discharge
OUT
IN
Stage 1
From Water Source
NOTE: Shut-off valves, strainers and
other required components not shown.
22
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Electrical - Thermostat Wiring
Figure 24: Units With Optional ECM Fan.
ѥꢀCAUTION! ѥ
Connection to ECM Control
Thermostat
CAUTION! Many units are installed with a factory or ¿eld
supplied manual or electric shut-off valve. DAMAGE
WILL OCCUR if shut-off valve is closed during unit
operation. A high pressure switch must be installed on
the heat pump side of any ¿eld provided shut-off valves
and connected to the heat pump controls in series with
the built-in refrigerant circuit high pressure switch to
disable compressor operation if water pressure exceeds
pressure switch setting. The ¿eld installed high pressure
switch shall have a cut-out pressure of 300 psig and a
cut-in pressure of 250 psig. This pressure switch can
ECM
Board
Y1
Y2
W
Compressor
Compressor Stage 2
Auxiliary Heat
Y1
Y2
W
Dehumidification DH
DH
O
Reversing Valve
Fan
O
G
R
C
L
G
R
24Vac Hot
24Vac Common
Fault LED
be ordered from with a 1/4” internal Àare
Manufacturer
C
connection as part number 39B0005N02.
AL1
ѥꢀCAUTION! ѥ
Units with CXM or DXM board and ECM fan motor, utilizing ECM dehumidification mode
CAUTION! Refrigerant pressure activated water regulating
Notes:
Manufacturer
valves should never be used with
equipment.
1) ECM dehumidification mode slows down fan speed in the cooling mode when
dehumidification output from thermostat is active. Normal heating and cooling fan
speeds are not affected.
2) ECM board DIP switch SW9 must be in dehumid. mode for ECM dehumidification mode.
Thermostat Installation
The thermostat should be located on an interior wall in a
larger room, away from supply duct drafts. DO NOT locate
the thermostat in areas subject to sunlight, drafts or on
external walls. The wire access hole behind the thermostat
may in certain cases need to be sealed to prevent erroneous
temperature measurement. Position the thermostat back
plate against the wall so that it appears level and so the
thermostat wires protrude through the middle of the back
plate. Mark the position of the back plate mounting holes
and drill holes with a 3/16” (5mm) bit. Install supplied
anchors and secure plate to the wall. Thermostat wire must
be 18 AWG wire. Wire the appropriate thermostat as shown
in Figures 24 and 25 to the low voltage terminal strip on the
CXM (units with PSC motor) or ECM control board (units
with ECM motor). Practically any heat pump thermostat will
work with these units, provided it has the correct number of
heating and cooling stages.
Figure 25: Typical Thermostat 2 Heat/1 Cool (PSC Fan)
Connection to CXM Control
1 Thermostat
CXM
Y
Y2/W
O
Y
W
O
Compressor
Heating Stage 2
Reversing Valve
Fan
G
G
24Vac Hot
R
R
24Vac Common
Fault LED
C
C
L
AL1
NOTICE: Units with ClimaDry whole house dehumidiÄcation
option require a separate humidistat or thermostat part
number ATP32U04 (See ClimaDry AOM for more details).
23
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
ECM Blower Control
The ECM fan is controlled by an interface board that converts
thermostat inputs and field selectable CFM settings to signals
used by the ECM motor controller. Units manufactured before
July 2005 have version I (P/N 69243707). Units manufactured
after July 2005 have version II (P/N 17B0019N01). Fan speeds
are selected with jumpers for version I or via a nine position DIP
switch for version II. To take full advantage of the ECM motor
features, a multi-stage thermostat should be used (2-stage
heat/2-stage cool or 3-stage heat/2-stage cool).
operating in the normal mode, the cooling airflow settings
are determined by the cooling tap setting above. When
dehumidification is enabled there is a reduction in airflow
in cooling to increase the moisture removal of the heat pump.
Consult submittal data or specifications catalog for the specific
unit series and model to correlate speed tap to airflow in CFM.
The dehumidification mode can be enabled in two ways.
1. Constant Dehumidification Mode: When the dehumidification
mode is selected (via DIP switch or jumper setting), the ECM
motor will operate with a multiplier applied to the cooling
CFM settings (approx. 20-25% lower airflow). Any time the
unit is running in the cooling mode, it will operate at the lower
airflow to improve latent capacity. The “DEHUM” LED will be
illuminated at all times. Heating airflow is not affected. NOTE:
Do not select dehumidification mode if cooling setting is tap 1.
HFC-410A packaged units built after May 2009 have ECM
controller version III (P/N 17B0034N01). This controller includes
logic and a relay to control the HWG functions.
Note: Power must be off to the unit for at least three seconds
before the ECM motor will recognize a speed change. The motor
will recognize a change in the CFM Adjust or dehumidification
mode settings while the unit is powered.
2. Automatic (Humidistat-controlled) Dehumidification Mode:
When the dehumidification mode is selected (via DIP switch
or jumper setting) AND a humidistat is connected to terminal
DH (version II) or HUM (version I), the cooling airflow will
only be reduced when the humidistat senses that additional
dehumidification is required. The DH (or HUM) terminal is
reverse logic. Therefore, a humidistat (not dehumidistat) is
required. The “DEHUM” LED will be illuminated only when
the humidistat is calling for dehumidification mode. Heating
airflow is not affected. NOTE: Do not select dehumidification
mode if cooling setting is tap 1.
There are four different airflow settings from lowest airflow rate
(speed tap 1) to the highest airflow rate (speed tap 4). The charts
below indicate settings for both versions of the ECM interface
board, followed by detailed information for each setting.
Cooling Settings: The cooling setting determines the cooling
(normal) CFM for all units with ECM motor. Cooling (normal)
setting is used when the unit is not in dehumidification mode.
Tap 1 is the lowest CFM setting, while tap 4 is the highest CFM
setting. To avoid air coil freeze-up, tap 1 may not
be used if the dehumidification mode is selected. Consult
submittal data or specifications catalog for the specific unit series
and model to correlate speed tap setting to airflow in CFM.
Heating Settings: The heating setting determines the heating
CFM for HT units. Tap 1 is the lowest CFM setting, while tap 4 is
the highest CFM setting. Consult submittal data or specifications
catalog for the specific unit series and model to correlate speed
tap setting to airflow in CFM.
Auxiliary/Emergency Heat Settings: The auxiliary/emergency
heat setting determines the CFM when the unit is in auxiliary
heat or emergency heat mode. This setting is used for residential
units with internal electric heat. When auxiliary electric heat is
energized (i.e. compressor and electric heat), the greater of the
auxiliary/emergency or heating setting will be used. A “G” (fan)
signal must be present from the thermostat for electric heat to
operate. Consult the submittal data or specifications catalog for
the specific unit series and model to correlate speed tap setting to
airflow in CFM.
CFM Adjust Settings: The CFM adjust setting allows four
selections. The NORM setting is the factory default position. The
+ or – settings adjust the airflow by +/- 15%. The +/- settings are
used to “fine tune” airflow adjustments. The TEST setting runs the
ECM motor at 70% torque, which causes the motor to operate like
a standard PSC motor, and disables the CFM counter.
Dehumidification Mode Settings: The dehumidification mode
setting provides field selection of humidity control. When
24
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
ECM Blower Control
Table 5: ECM Board Tap Settings
Cooling settings:
Heating settings:
Aux/Emerg Heat settings:
HT Units
HT Units
HT Units
Version I
69243707
Version I
69243707
Version I
69243707
Version II and III
Version II and III
Version II and III
(17B0019N01 & 17B0034N01)
(17B0019N01 & 17B0034N01)
(17B0019N01 & 17B0034N01)
Tap
HP CFM
DIP Switch
Tap
DIP Switch
Tap
AUX CFM
DIP Switch
DELAY
Setting
Jumper
SW1
ON
ON
OFF
OFF
SW2
ON
OFF
ON
Setting
Jumper
SW3
ON
ON
OFF
OFF
SW4
ON
OFF
ON
Setting
Jumper
SW5
ON
ON
OFF
OFF
SW6
ON
OFF
ON
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
OFF
OFF
OFF
*Residential Units
CFM Adjust settings:
Dehum Mode settings:
HT Units
HT Units
Version I
69243707
CFM Adj
Jumper
Version I
69243707
Dehumid
Jumper
pins 1,2
Version II and III
Version II and III
(17B0019N01 & 17B0034N01)
(17B0019N01 & 17B0034N01)
Tap
Setting
TEST
-
+
DIP Switch
Tap
DIP Switch
SW9
SW7
SW8
Setting
NORM
Dehumid
1
2
3
4
ON
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
pins 2,3
NORM
Figure 26a: ECM Version II Interface Layout
Figure 26b: ECM Version I Interface Layout
1/4" Spade
Connections
to CXM or
DXM Board
1/4" Spade
Connections
to CXM or
Thermostat
Input LEDs
G
G
G
G
R
A
L
DXM Board
Thermostat
Input LEDs
G
Y1 Y2
O
W1 EM
C
R
CFM Counter
1 flash per 100CF
CFM Counter
1 flash per 100 CFM
LED's
CFM
Thermostat
Thermostat
Connections
Connections
Y
ECM Motor
Low Voltage
Connector
ECM Motor
Low Voltage
Connector
J01
G
Dehumidification
LED
Dehumidification
LED
Fan Speed Selection DIP Switch
Fan Speed Selection Jumpers
Figure 26c: ECM Version III Interface Layout
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25
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
HT Series ECM Blower Performance Data
Residential
Units Only
Airflow in CFM with wet coil and clean air filter
Dehumid
Mode
Cooling Mode
Heating Mode
Max
ESP
(in. wg)
Fan
Motor
(hp)
Fan
Only
Mode
Aux/
Emerg
Mode
Model
Range
Stg 1 Stg 2 Stg 1 Stg 2 Stg 1 Stg 2
Default
Maximum
Minimum
Default
700
1000
600
525
800
550
800
425
600
750
1000
600
600
850
350
1000
300
850
024
1.0
0.9
1.0
0.7
0.7
1/2
1/2
1
1000
700
450
550
400
450
1050
1500
900
800
850
650
1100
1500
900
850
550
1350
1500
1350
1500
2000
1350
1875
2300
1500
2000
2300
1800
036
Maximum
Minimum
Default
1100
600
1200
825
900
1100
600
1500
450
550
1400
2000
1200
1750
2300
1500
1900
2300
1800
1050
1500
900
1100
1600
1100
1400
2000
1375
1650
2000
1650
850
1500
2000
1200
1875
2300
1500
2000
2300
1800
1150
1500
900
700
048
Maximum
Minimum
Default
1200
825
2000
600
1300
1900
1100
1450
2200
1350
1050
1500
1000
1250
1800
1250
1450
1900
1100
1650
2200
1350
875
060
1
Maximum
Minimum
Default
2300
750
950
070
1
Maximum
Minimum
2300
900
During Auxiliary operation (residential units only) the CFM will run at the higher if the heating (delay jumper) or AUX settings
Airflow is controlled within +/- 5% up to Max ESP shown with wet coil and standard 1” fiberglass filter
Do not select Dehumidification mode if HP CFM is on setting 1
All units AHRI/ISO/ASHRAE 13256-1 rated HP (Cooling) Delay (Heating) CFM Setting 3
Note: See the ECM Blower Control section for information on setting taps.
26
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
CXM Controls
CXM Control
On = EH2 Normal. Off = DDC Output at EH2.
For detailed control information, see CXM Application, Operation
and Maintenance (AOM) manual (part #97B0003N12).
NOTE: Some CXM controls only have a 2 position DIP switch
package. If this is the case, this option can be selected by
clipping the jumper which is in position 4
Field Selectable Inputs
of SW1.
Test mode: Test mode allows the service technician to check
the operation of the control in a timely manner. By momentarily
shorting the test terminals, the CXM control enters a 20 minute
test mode period in which all time delays are sped up 15 times.
Upon entering test mode, the status LED will flash a code
representing the last fault. For diagnostic ease at the thermostat,
the alarm relay will also cycle during test mode. The alarm relay
will cycle on and off similar to the status LED to indicate a code
representing the last fault, at the thermostat. Test mode can be
exited by shorting the test terminals for 3 seconds.
Jumper not clipped = EH2 Normal. Jumper clipped = DDC
Output at EH2.
DIP switch 5: Factory Setting - Normal position is “On.” Do not
change selection unless instructed to do so by the factory.
Table 6a: CXM LED And Alarm Relay Operations
Description of Operation
Normal Mode
LED
On
Alarm Relay
Open
Normal Mode with UPS Warning
CXM is non-functional
Fault Retry
On
Cycle (closed 5 sec., Open 25 sec.)
Off
Open
Slow Flash
Fast Flash
Slow Flash
Open
Closed
Retry Mode: If the control is attempting a retry of a fault,
the status LED will slow flash (slow flash = one flash every 2
seconds) to indicate the control is in the process of retrying.
Lockout
Over/Under Voltage Shutdown
Open (Closed after 15 minutes)
Test Mode - No fault in memory Flashing Code 1
Test Mode - HP Fault in memory Flashing Code 2
Test Mode - LP Fault in memory Flashing Code 3
Test Mode - FP1 Fault in memory Flashing Code 4
Test Mode - FP2 Fault in memory Flashing Code 5
Test Mode - CO Fault in memory Flashing Code 6
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Cycling Code 7
Field Configuration Options
Note: In the following field configuration options, jumper wires
should be clipped ONLY when power is removed from the CXM
control.
Water coil low temperature limit setting: Jumper 3 (JW3-FP1 Low
Temp) provides field selection of temperature
limit setting for FP1 of 30°F or 10°F [-1°F or -12°C] (refrigerant
temperature).
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
Air coil low temperature limit setting: Jumper 2 (JW2-FP2 Low
Temp) provides field selection of temperature limit setting for
FP2 of 30°F or 10°F [-1°F or -12°C] (refrigerant temperature).
Note: This jumper should only be clipped under extenuating
circumstances, as recommended by
Test Mode - Over/Under
Flashing Code 7
shutdown in memory
Test Mode - UPS in memory
Flashing Code 8
Cycling Code 8
Cycling Code 9
Test Mode - Swapped Thermistor Flashing Code 9
-Flash code 2 = 2 quick flashes, 10 second pause, 2 quick
flashes, 10 second pause, etc.
-On pulse 1/3 second; off pulse 1/3 second
the factory.
Figure 27: Test Mode Pins
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
Alarm relay setting: Jumper 1 (JW1-AL2 Dry) provides field
selection of the alarm relay terminal AL2 to be jumpered to 24VAC
or to be a dry contact (no connection).
Short test pins
together to enter Test
Mode and speed-up
timing and delays for
20 minutes.
Not Clipped = AL2 connected to R. Clipped = AL2 dry contact
(no connection).
DIP Switches
Note: In the following field configuration options, DIP switches
should only be changed when power is removed from the CXM
control.
DIP switch 1: Unit Performance Sentinel Disable - provides field
selection to disable the UPS feature.
On = Enabled. Off = Disabled.
DIP switch 2: Stage 2 Selection - provides selection of whether
compressor has an “on” delay. If set to stage 2, the compressor
will have a 3 second delay before energizing. Also, if set for stage
2, the alarm relay will NOT cycle during test mode.
On = Stage 1. Off = Stage 2
DIP switch 3: Not Used.
DIP switch 4: DDC Output at EH2 - provides selection for DDC
operation. If set to “DDC Output at EH2,” the EH2 terminal will
continuously output the last fault code of the controller. If set to
“EH2 normal,” EH2 will operate as standard electric heat output.
27
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
CXM Controls
Safety Features – CXM Control
fault. The FP2 input is bypassed for the initial 120 seconds of a
compressor run cycle. FP2 is set at the factory for one try. Therefore,
the control will go into lockout mode once the FP2 fault has occurred.
FP2 lockout code = 5
Condensate overflow: The condensate overflow sensor must
sense overflow level for 30 continuous seconds to be recognized
as a CO fault. Condensate overflow will be monitored at all times.
CO lockout code = 6
Over/under voltage shutdown: An over/under voltage condition
exists when the control voltage is outside the range of 18VAC to
31.5VAC. Over/under voltage shut down is a self-resetting safety.
If the voltage comes back within range for at least 0.5 seconds,
normal operation is restored. This is not considered a fault or
lockout. If the CXM is in over/under voltage shutdown for 15
minutes, the alarm relay will close.
The safety features below are provided to protect the compressor,
heat exchangers, wiring and other components from damage
caused by operation outside of design conditions.
Anti-short cycle protection: The control features a 5 minute anti-
short cycle protection for the compressor.
Note: The 5 minute anti-short cycle also occurs at power up.
Random start: The control features a random start upon power up
of 5-80 seconds.
Fault Retry: In Fault Retry mode, the Status LED begins slowly
flashing to signal that the control is trying to recover from a fault
input. The control will stage off the outputs and then “try again”
to satisfy the thermostat input call. Once the thermostat input call
is satisfied, the control will continue on as if no fault occurred. If
3 consecutive faults occur without satisfying the thermostat input
call, the control will go into “lockout” mode. The last fault causing
the lockout will be stored in memory and can be viewed by going
into test mode. Note: FP1/FP2 faults are factory set at only one
try.
Over/under voltage shut down code = 7
Unit Performance Sentinel-UPS (patent pending): The UPS feature
indicates when the heat pump is operating inefficiently. A UPS
condition exists when:
a) In heating mode with compressor energized, FP2 is greater
than 125°F [52°C] for 30 continuous seconds, or:
Lockout: In lockout mode, the status LED will begin fast flashing.
The compressor relay is turned off immediately. Lockout mode can
be “soft” reset by turning off the thermostat (or satisfying the call).
A “soft” reset keeps the fault in memory but resets the control. A
“hard” reset (disconnecting power to the control) resets the control
and erases fault memory.
b) In cooling mode with compressor energized, FP1 is greater
than 125°F [52°C] for 30 continuous seconds, or:
c)
In cooling mode with compressor energized, FP2 is less than
40°F [4.5°C] for 30 continuous seconds. If a UPS condition
occurs, the control will immediately go to UPS warning. The
status LED will remain on as if the control is in normal mode.
Outputs of the control, excluding LED and alarm relay, will NOT
be affected by UPS. The UPS condition cannot occur during a
compressor off cycle. During UPS warning, the alarm relay will
cycle on and off. The cycle rate will be “on” for 5 seconds, “off”
for 25 seconds, “on” for 5 seconds, “off” for 25 seconds, etc.
Lockout with emergency heat: While in lockout mode, if W becomes
active (CXM), emergency heat mode will occur.
High pressure switch: When the high pressure switch opens due
to high refrigerant pressures, the compressor relay is de-energized
immediately since the high pressure switch is in series with the
compressor contactor coil. The high pressure fault recognition is
immediate (does not delay for 30 continuous seconds before de-
energizing the compressor).
High pressure lockout code = 2
Example: 2 quick flashes, 10 sec pause, 2 quick flashes, 10 sec.
pause, etc.
Low pressure switch: The low pressure switch must be open and
remain open for 30 continuous seconds during “on” cycle to be
recognized as a low pressure fault. If the low pressure switch is open
for 30 seconds prior to compressor power up it will be considered a
low pressure (loss of charge) fault. The low pressure switch input is
bypassed for the initial 60 seconds of a compressor run cycle.
Low pressure lockout code = 3
Water coil low temperature (FP1): The FP1 thermistor temperature
must be below the selected low temperature limit setting for 30
continuous seconds during a compressor run cycle to be recognized
as a FP1 fault. The FP1 input is bypassed for the initial 120 seconds
of a compressor run cycle. FP1 is set at the factory for one try.
Therefore, the control will go into lockout mode once the FP1 fault
has occurred.
UPS warning code = 8
Swapped FP1/FP2 thermistors: During test mode, the control
monitors to see if the FP1 and FP2 thermistors are in the
appropriate places. If the control is in test mode, the control will
lockout, with code 9, after 30 seconds if:
a) The compressor is on in the cooling mode and the FP1 sensor
is colder than the FP2 sensor, or:
b) The compressor is on in the heating mode and the FP2 sensor
is colder than the FP1 sensor.
Swapped FP1/FP2 thermistor code = 9.
Diagnostic Features
The LED on the CXM board advises the technician of the current
status of the CXM control. The LED can display either the current
CXM mode or the last fault in memory if in test mode. If there is no
fault in memory, the LED will flash Code 1 (when in test mode).
FP1 lockout code = 4
Air coil low temperature (FP2): The FP2 thermistor temperature must
be below the selected low temperature limit setting for 30 continuous
seconds during a compressor run cycle to be recognized as a FP2
28
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
CXM Controls
CXM Control Start-up Operation
The control will not operate until all inputs and safety controls
are checked for normal conditions. The compressor will have a
5 minute anti-short cycle delay at power-up. The first time after
power-up that there is a call for compressor, the compressor will
follow a 5 to 80 second random start delay. After the random start
delay and anti-short cycle delay, the compressor relay will be
energized. On all subsequent compressor calls, the random start
delay is omitted.
Table 6b: Unit Operation
HT
T-stat signal
ECM fan
G
Fan only
G, Y or Y1
G, Y1, Y2
G, Y1, Y2, W
G, W
Stage 1 heating1
Stage 2 heating1
Stage 3 heating1
Emergency heat
Stage 1 cooling2
Stage 2 cooling2
G, Y or Y1, O
G, Y1, Y2, O
1
Stage 1 = 1st stage compressor, 1st stage fan operation
Stage 2 = 2nd stage compressor, 2nd stage fan operation
Stage 3 = 2nd stage compressor, auxiliary electric heat, 2nd
or 3rd stage fan operation (depending on fan settings)
2
3
Stage 1 = 1st stage compressor, 1st stage fan operation, reversing valve
Stage 2 = 2nd stage compressor, 2nd stage fan operation, reversing valve
Stage 1 = compressor, 1st stage fan operation
Stage 2 = compressor, 2nd stage fan operation
Stage 3 = compressor, auxiliary electric heat, 2nd or 3rd stage fan operation (depending on fan settings)
Stage 1 = compressor, 1st stage fan operation, reversing valve
Stage 2 = compressor, 2nd stage fan operation, reversing valve
Stage 1 = compressor, fan
Stage 2 = compressor, auxiliary electric heat, fan
Cooling = compressor, fan, reversing valve
4
5
6
29
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
CXM Controls
Table 7: Nominal resistance at various temperatures
CXM Thermostat Details
Thermostat Compatibility - Most all heat pump thermostats can
be used with the CXM control. However Heat/Cool stats are
NOT compatible with the CXM.
Resistance
(kOhm)
85.34
84.00
81.38
61.70
58.40
55.30
52.38
49.64
47.05
44.61
42.32
40.15
38.11
36.18
34.37
32.65
31.03
29.50
28.05
26.69
25.39
24.17
23.02
21.92
20.88
19.90
18.97
18.09
17.26
16.46
15.71
15.00
14.32
13.68
13.07
12.49
11.94
11.42
10.92
10.45
10.00
9.57
9.16
8.78
8.41
8.06
7.72
7.40
7.10
6.81
6.53
6.27
6.01
5.77
5.54
5.33
5.12
4.92
4.72
4.54
4.37
4.20
4.04
3.89
3.74
3.60
3.47
3.34
3.22
3.10
Resistance
(kOhm)
2.99
2.88
2.77
2.67
2.58
2.49
2.40
2.32
2.23
2.16
2.08
2.01
1.94
1.88
1.81
1.75
1.69
1.64
1.58
1.53
1.48
1.43
1.39
1.34
1.30
1.26
1.22
1.18
1.14
1.10
1.07
1.04
1.01
0.97
0.94
0.92
0.89
0.86
0.84
0.81
0.79
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
0.59
0.57
0.55
0.54
0.52
0.51
0.50
0.48
0.47
0.46
0.44
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
Temp (ºC) Temp (ºF)
Temp (ºC) Temp (ºF)
-17.8
-17.5
-16.9
-12
-11
-10
-9
0.0
0.5
1.5
55
56
131.0
132.8
134.6
136.4
138.2
140.0
141.8
143.6
145.4
147.2
149.0
150.8
152.6
154.4
156.2
158.0
159.8
161.6
163.4
165.2
167.0
168.8
170.6
172.4
174.2
176.0
177.8
179.6
181.4
183.2
185.0
186.8
188.6
190.4
192.2
194.0
195.8
197.6
199.4
201.2
203.0
204.8
206.6
208.4
210.2
212.0
213.8
215.6
217.4
219.2
221.0
222.8
224.6
226.4
228.2
230.0
231.8
233.6
235.4
237.2
239.0
240.8
242.6
244.4
246.2
248.0
249.8
251.6
253.4
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
10.4
12.2
14.0
15.8
17.6
19.4
21.2
23.0
24.8
26.6
28.4
30.2
32.0
33.8
35.6
37.4
39.2
41.0
42.8
44.6
46.4
48.2
50.0
51.8
53.6
55.4
57.2
59.0
60.8
62.6
64.4
66.2
68.0
69.8
71.6
73.4
75.2
77.0
78.8
80.6
82.4
84.2
86.0
87.8
89.6
91.4
93.2
95.0
96.8
98.6
100.4
102.2
104.0
105.8
107.6
109.4
111.2
113.0
114.8
116.6
118.4
120.2
122.0
123.8
125.6
127.4
129.2
Anticipation Leakage Current - Maximum leakage current for
"Y" is 50 mA and for "W" is 20mA. Triacs can be used if leakage
current is less than above. Thermostats with anticipators can be
used if anticipation current is less than that specified above.
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
Thermostat Signals -
• "Y" and "W" have a 1 second recognition time when
being activated or being removed.
• "O" and "G" are direct pass through signals but are
monitored by the micro processor.
• "R" and "C" are from the transformer.
• "AL1" and "AL2" originate from the alarm relay.
• "A" is paralleled with the compressor output for use
with well water solenoid valves.
• The "Y" 1/4" quick connect is a connection point to the
"Y" input terminal P1 for factory use. This "Y" terminal
can be used to drive panel mounted relays such as the
loop pump relay.
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
30
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Commissioning And Operating Conditions
Operating Limits
Environment – Units are designed for indoor installation only. Never install units in areas subject to freezing or where humidity levels could
cause cabinet condensation (such as unconditioned spaces subject to 100% outside air).
Power Supply – A voltage variation of +/– 10% of nameplate utilization voltage is acceptable.
Determination of operating limits is dependent primarily upon three factors: 1) return air temperature. 2) water temperature, and 3)
ambient temperature. When any one of these factors is at minimum or maximum levels, the other two factors should be at normal levels
to insure proper unit operation. Extreme variations in temperature and humidity and/or corrosive water or air will adversely affect unit
performance, reliability, and service life. Consult Table 8a for operating limits.
Table 8a: Building Operating Limits
UHnTit
Operating Limits
Cooling
Heating
Air Limits
Min. ambient air, DB
45ºF [7ºC]
39ºF [4ºC]
Rated ambient air, DB
80.6ºF [27ºC]
68ºF [20ºC]
Max. ambient air, DB
130ºF [54ºC]
85ºF [29ºC]
Min. entering air, DB/WB
65/45ºF [18/7ºC]
70/50ºF Reheat
50ºF [10ºC]
Rated entering air, DB/WB 80.6/66.2ºF [27/19ºC]
68ºF [20ºC]
100/75ºF [38/24ºC]
80ºF [27ºC]
Max. entering air, DB/WB
Water Limits
20ºF [-6.7ºC]
Min. entering water
20ºF [-6.7ºC]
Normal entering water
50-110ºF [10-43ºC]
30-70ºF [-1 to 21ºC]
Max. entering water
120ºF [49ºC]
120ºF [49ºC]
[1.6 to 3.2 l/m per kW]
1.5 to 3.0 gpm / ton
Normal Water Flow
Commissioning Conditions
Consult Table 8b for the particular model. Starting conditions vary depending upon model and are based upon the following notes:
Notes:
1. Conditions in Table 8b are not normal or continuous operating conditions. Minimum/maximum limits are start-up conditions to bring
the building space up to occupancy temperatures. Units are not designed to operate under these conditions on a regular basis.
2. Voltage utilization range complies with AHRI Standard 110.
Table 8b: Building Commissioning Limits
H
T
Commissioning Limits
Cooling
Heating
Air Limits
Min. ambient air, DB
Rated ambient air, DB
Max. ambient air, DB
Min. entering air, DB/WB
Rated entering air, DB/WB 80.6/66.2ºF [27/19ºC]
Max. entering air, DB/WB
Water Limits
45ºF [7ºC]
80.6ºF [27ºC]
130ºF [54ºC]
60ºF [16ºC]
39ºF [4ºC]
68ºF [20ºC]
85ºF [29ºC]
40ºF [4.5ºC]
68ºF [20ºC]
80ºF [27ºC]
110/83ºF [43/28ºC]
Min. entering water
Normal entering water
Max. entering water
20ºF [-6.7ºC]
50-110ºF [10-43ºC]
120ºF [49ºC]
20ºF [-6.7ºC]
30-70ºF [-1 to 21ºC]
120ºF [49ºC]
1.5 to 3.0 gpm / ton
[1.6 to 3.2 l/m per kW]
Normal Water Flow
31
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Start-Up and Operating Conditions
ꢁ
ꢁ
Low water temperature cutout: Verify that low water
temperature cut-out controls are set properly
(FP1 - JW3).
Miscellaneous: Note any questionable aspects of
the installation.
Unit and System Checkout
BEFORE POWERING SYSTEM, please check the following:
UNIT CHECKOUT
ꢁ
Balancing/shutoff valves: Insure that all isolation valves are
open and water control valves are wired.
ꢁ
Line voltage and wiring: Verify that voltage is within an
acceptable range for the unit and wiring and fuses/breakers
are properly sized. Verify that low voltage wiring is complete.
Unit control transformer: Insure that transformer has the
properly selected voltage tap. Residential 208-230V units are
factory wired for 230V operation unless specified otherwise.
Loop/water piping is complete and purged of air. Water/
piping is clean.
ꢀ CAUTION! ꢀ
CAUTION! Verify that ALL water control valves are open
and allow water flow prior to engaging the compressor.
Freezing of the coax or water lines can permanently
damage the heat pump.
ꢁ
ꢁ
ꢀ CAUTION! ꢀ
ꢁ
ꢁ
Antifreeze has been added if necessary.
CAUTION! To avoid equipment damage, DO NOT
leave system filled in a building without heat during the
winter unless antifreeze is added to the water loop. Heat
exchangers never fully drain by themselves and will
freeze unless winterized with antifreeze.
Entering water and air: Insure that entering water and air
temperatures are within operating limits of Table 8.
Low water temperature cutout: Verify that low water
temperature cut-out on the CXM/CXM control is properly set.
Unit fan: Manually rotate fan to verify free rotation and insure
that blower wheel is secured to the motor shaft. Be sure to
remove any shipping supports if needed. DO NOT oil motors
upon start-up. Fan motors are pre-oiled at the factory.
Check unit fan speed selection and compare to design
requirements.
Condensate line: Verify that condensate line is open and
properly pitched toward drain.
HWG pump is disconnected unless piping is completed and
air has been purged from the system.
Water flow balancing: Record inlet and outlet water
temperatures for each heat pump upon startup. This check
can eliminate nuisance trip outs and high velocity water flow
that could erode heat exchangers.
Unit air coil and filters: Insure that filter is clean and
accessible. Clean air coil of all manufacturing oils.
Unit controls: Verify that CXM field selection options are
properly set. Low voltage wiring is complete.
ꢁ
ꢁ
Unit Start-up Procedure
1. Turn the thermostat fan position to “ON.” Blower
should start.
2. Balance air flow at registers.
3. Adjust all valves to their full open position. Turn on the line
power to all heat pump units.
4. Room temperature should be within the minimum-maximum
ranges of Table 8b. During start-up checks, loop water
temperature entering the heat pump should be between 30°F
[-1°C] and 95°F [35°C].
5. Two factors determine the operating limits of water source
heat pumps, (a) return air temperature, and (b) water
temperature. When any one of these factors is at a minimum
or maximum level, the other factor must be at normal level to
insure proper unit operation.
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
a. Adjust the unit thermostat to the warmest setting. Place
the thermostat mode switch in the “COOL” position.
Slowly reduce thermostat setting until the compressor
activates.
ꢁ
ꢁ
Blower speed is set.
Service/access panels are in place.
SYSTEM CHECKOUT
b. Check for cool air delivery at the unit grille within a few
minutes after the unit has begun to operate.
Note: Units have a five minute time delay in the control
circuit that can be bypassed on the CXM/CXM control
board as shown below in Figure 27. See controls
description for details.
c. Verify that the compressor is on and that the water flow
rate is correct by measuring pressure drop through the
heat exchanger using the P/T plugs and comparing to
Tables 9a through 9b.
d. Check the elevation and cleanliness of the condensate
lines. Dripping may be a sign of a blocked line. Check
that the condensate trap is filled to provide a water seal.
e. Refer to Table 10. Check the temperature of both entering
and leaving water. If temperature is within range, proceed
with the test. If temperature is outside of the operating
range, check refrigerant pressures and compare to Tables
11 through 12. Verify correct water flow by comparing unit
ꢁ
ꢁ
ꢁ
System water temperature: Check water temperature for
proper range and also verify heating and cooling set points
for proper operation.
System pH: Check and adjust water pH if necessary to
maintain a level between 6 and 8.5. Proper pH promotes
longevity of hoses and fittings (see Table 3).
System flushing: Verify that all air is purged from the system.
Air in the system can cause poor operation or system
corrosion. Water used in the system must be potable quality
initially and clean of dirt, piping slag, and strong chemical
cleaning agents. Some antifreeze solutions may require
distilled water.
ꢁ
ꢁ
Flow Controller pump(s): Verify that the pump(s) is wired,
purged of air, and in operating condition.
System controls: Verify that system controls function and
operate in the proper sequence.
32
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Start-Up Procedure
pressure drop across the heat exchanger versus the data
in Tables 9a through 9b. Heat of rejection (HR) can be
calculated and compared to catalog data capacity pages.
The formula for HR for systems with water is as follows:
HR = TD x GPM x 500, where TD is the temperature
difference between the entering and leaving water,
and GPM is the flow rate in U.S. GPM, determined by
comparing the pressure drop across the heat exchanger
to Tables 9a through 9b.
ꢀ WARNING! ꢀ
WARNING! When the disconnect switch is closed, high
voltage is present in some areas of the electrical panel.
Exercise caution when working with energized equipment.
ꢀ CAUTION! ꢀ
CAUTION! Verify that ALL water control valves are open
and allow water flow prior to engaging the compressor.
Freezing of the coax or water lines can permanently
damage the heat pump.
f. Check air temperature drop across the air coil when
compressor is operating. Air temperature drop should be
between 15°F and 25°F [8°C and 14°C].
g. Turn thermostat to “OFF” position. A hissing noise
indicates proper functioning of the reversing valve.
6. Allow five (5) minutes between tests for pressure to equalize
before beginning heating test.
a. Adjust the thermostat to the lowest setting. Place the
thermostat mode switch in the “HEAT” position.
b. Slowly raise the thermostat to a higher temperature until
the compressor activates.
c. Check for warm air delivery within a few minutes after the
unit has begun to operate.
d. Refer to Table 10. Check the temperature of both entering
and leaving water. If temperature is within range, proceed
with the test. If temperature is outside of the operating
range, check refrigerant pressures and compare to Tables
11 through 12. Verify correct water flow by comparing
unit pressure drop across the heat exchanger versus the
data in Tables 9a through 9b. Heat of extraction (HE) can
be calculated and compared to submittal data capacity
pages. The formula for HE for systems with water is as
follows:
HE = TD x GPM x 500, where TD is the temperature
difference between the entering and leaving water,
and GPM is the flow rate in U.S. GPM, determined by
comparing the pressure drop across the heat exchanger to
Tables 9a through 9b.
e. Check air temperature rise across the air coil when
compressor is operating. Air temperature rise should be
between 20°F and 30°F [11°C and 17°C].
f. Check for vibration, noise, and water leaks.
7. If unit fails to operate, perform troubleshooting analysis
(see troubleshooting section). If the check described fails
to reveal the problem and the unit still does not operate,
contact a trained service technician to insure proper
diagnosis and repair of the equipment.
8. When testing is complete, set system to maintain desired
comfort level.
9. BE CERTAIN TO FILL OUT AND RETURN ALL WARRANTY
REGISTRATION PAPERWORK.
Note: If performance during any mode appears abnormal, refer
to the CXM section or troubleshooting section of this manual.
To obtain maximum performance, the air coil should be cleaned
before start-up. A 10% solution of dishwasher detergent and
water is recommended.
33
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Operating Conditions
Table 9a: HT Coax Water Pressure Drop
Pressure Drop (psi)
Model
GPM
30°F
50°F
70°F
90°F
2.3
3.0
3.4
4.5
6.0
0.7
1.1
1.3
2.0
3.1
0.4
0.7
0.9
1.4
2.3
0.4
0.6
0.8
1.2
1.9
0.5
0.7
0.8
1.2
1.8
024
3.0
4.5
6.0
6.8
9.0
1.5
2.6
3.8
4.5
6.9
0.9
1.7
2.7
3.2
5.2
0.8
1.5
2.3
2.7
4.4
0.9
1.5
2.2
2.6
4.1
036
4.5
6.0
6.8
9.0
12.0
1.5
2.6
3.8
4.5
6.9
0.6
1.1
1.4
2.5
4.2
0.5
1.0
1.3
2.3
3.8
0.3
0.9
1.2
2.2
3.5
048
6.0
7.5
9.0
11.3
12.0
15.0
0.9
1.7
2.5
3.7
4.1
6.1
0.2
0.9
1.5
2.6
3.0
4.7
0.2
0.7
1.3
2.3
2.6
4.1
0.3
0.8
1.4
2.3
2.6
4.0
060
7.0
8.5
10.5
12.8
14.0
17.0
1.4
2.2
3.3
4.6
5.4
7.6
0.7
1.3
2.2
3.4
4.1
6.0
0.5
1.1
1.9
3.0
3.6
5.4
0.7
1.2
2.0
2.9
3.5
5.2
070
Table 10: Water Temperature Change Through Heat Exchanger
ꢅꢂꢃꢂꢇ
ꢆꢂꢃꢂꢀꢇ
ꢀꢁꢂꢃꢂꢄꢅ
Antifreeze Correction Table
Cooling
Heating
WPD
Antifreeze
Antifreeze Type
%
EWT 90°F
Sens Cap
EWT 30°F
Corr. Fct.
EWT 30°F
Total Cap
Power
Htg Cap
Power
0
1.000
0.995
0.986
0.978
0.997
0.990
0.982
0.998
0.994
0.986
0.998
0.994
0.988
1.000
0.995
0.986
0.978
0.997
0.990
0.982
0.998
0.994
0.986
0.998
0.994
0.988
1.000
1.003
1.009
1.014
1.002
1.007
1.012
1.002
1.005
1.009
1.002
1.004
1.008
1.000
0.989
0.968
0.947
0.989
0.968
0.949
0.981
0.944
0.917
0.993
0.980
1.000
0.997
0.990
0.983
0.997
0.990
0.984
0.994
0.983
0.974
0.998
0.994
0.990
1.000
1.070
1.210
1.360
1.070
1.160
1.220
1.140
1.300
1.360
1.040
1.120
1.200
Water
5
15
25
5
Propylene Glycol
15
25
5
Methanol
Ethanol
15
25
5
15
25
Ethylene Glycol
0.966
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Operating Conditions
Table 11: HT Series Typical Unit Operating Pressures and Temperatures
HT024
Full Load Cooling - without HWG active
Water
Full Load Heating - without HWG active
Water
Entering
Air
Temp
Rise °F
DB
Water
Flow
Suction Discharge
Air Temp Suction Discharge
Drop °F Pressure Pressure Superheat Subcooling
Water
Temp
°F
Temp
Rise
°F
Temp
Drop
°F
Pressure Pressure Superheat Subcooling
GPM/ton
PSIG
PSIG
DB
PSIG
PSIG
1.5
2.25
3
72-83
75-85
78-88
273-293
275-295
277-297
6-11
6-11
6-11
3-8
3-8
3-8
5.9-7.9
4.2-6.2
2.7-4.7
16-22
17-23
18-24
30*
1.5
2.25
3
128-138
128-138
128-138
186-206
172-192
158-178
18-23
18-23
18-23
8-13
6-11
6-11
16.3-18.3
12.1-14.1
7.8-9.8
19-25
20-26
20-26
102-112
106-116
110-120
302-322
303-323
305-325
8-12
8-12
8-12
6-11
6-11
6-11
8.9-10.9
6.7-8.7
4.5-6.5
22-28
23-29
23-29
50
70
1.5
2.25
3
136-146
136-146
136-146
281-301
267-287
253-273
7-12
7-12
7-12
7-12
5-10
4-9
15.7-17.7
11.6-13.6
7.6-9.6
19-25
19-25
19-25
128-138
134-144
141-151
330-350
332-352
334-354
10-15
10-15
10-15
8-13
8-13
8-13
11.3-13.3
8.5-10.5
5.8-7.8
27-34
28-35
28-35
1.5
2.25
3
139-149
139-149
139-149
368-388
354-374
340-360
6-11
6-11
6-11
7-12
5-10
5-10
14.9-16.9
11-13
7.2-9.2
18-24
18-24
18-24
162-172
166-176
171-181
367-387
372-392
377-397
14-19
15-20
17-22
10-15
10-15
10-15
14.4-16.4
10.8-12.8
7.1-9.1
33-41
34-42
34-42
90
1.5
2.25
3
143-153
143-153
143-153
465-485
450-470
433-453
6-11
6-11
6-11
7-12
5-10
5-10
13.9-15.9
10.2-12.2
6.5-8.5
17-23
17-23
17-23
110
*Based on 15% Methanol antifreeze solution
Full Load Cooling - without HWG active
Full Load Heating - without HWG active
HT036
Entering
Water
Water
Temp
Drop
°F
Air
Temp
Rise °F
DB
Water
Flow
GPM/ton
Suction Discharge
Pressure Pressure Superheat Subcooling
Air Temp
Drop °F
DB
Suction Discharge
Pressure Pressure Superheat Subcooling
Water
Temp
°F
Temp
Rise
°F
PSIG
PSIG
PSIG
PSIG
1.5
2.25
3
69-79
73-83
76-86
293-313
297-317
300-320
7-12
7-12
7-12
14-19
14-19
14-19
8.9-10.9
6.7-8.7
4.5-6.5
17-23
18-24
19-25
30*
50
1.5
2.25
3
129-139
128-138
128-138
225-245
211-231
197-217
15-20
15-20
15-20
10-15
9-14
9-14
21.9-23.9
16.1-18.1
10.3-12.3
18-24
19-25
19-25
96-106
100-110
105-115
322-342
326-346
331-351
10-15
10-15
10-15
17-22
17-22
17-22
12.2-14.2
9.3-11.3
6.4-8.4
23-29
24-30
24-30
1.5
2.25
3
136-146
135-145
135-145
302-322
283-303
265-285
9-14
9-14
9-14
13-18
12-17
12-17
21.5-23.5
15.8-17.8
10-12
18-24
19-25
19-25
123-133
129-139
135-145
352-372
358-378
364-384
11-16
11-16
11-16
19-24
19-24
19-24
15-17
11.6-13.6
8.2-10.2
28-35
29-36
30-37
70
1.5
2.25
3
140-150
140-150
140-150
390-410
369-389
349-369
7-12
8-13
8-13
13-18
8-13
8-13
20.5-22.5
14.9-16.9
9.3-11.3
17-23
17-23
17-23
157-167
169-179
181-191
390-410
399-419
408-428
13-18
13-18
14-19
18-23
16.5-21.5
15-20
21-23
15.5-17.5
10.5-12.5
36-44
37-45
39-47
90
1.5
2.25
3
145-155
145-155
145-155
488-508
467-487
447-467
7-12
8-13
8-13
13-18
8-13
8-13
19-21
14-16
9-11
17-23
17-23
17-23
110
*Based on 15% Methanol antifreeze solution
HT048
Full Load Cooling - without HWG active
Full Load Heating - without HWG active
Entering
Water
Water
Temp
Drop
°F
Air
Temp
Rise °F
DB
Water
Flow
GPM/ton
Suction Discharge
Pressure Pressure Superheat Subcooling
Air Temp Suction Discharge
Drop °F Pressure Pressure Superheat Subcooling
Water
Temp
°F
Temp
Rise
°F
PSIG
PSIG
DB
PSIG
PSIG
1.5
2.25
3
66-76
69-79
72-82
286-306
289-309
292-312
7-12
7-12
7-12
8-13
9-14
9-14
8-10
6-8
4-6
18-24
19-25
19-25
30*
50
1.5
2.25
3
125-135
123-133
122-132
242-262
224-244
205-225
13-18
13-18
14-19
10-15
9-14
7-12
20.9-22.9
15.6-17.6
10.2-12.2
19-25
19-25
19-25
93-103
98-108
103-113
314-334
320-340
326-346
8-13
8-13
8-13
10-15
10-15
10-15
11.5-13.5
8.7-10.7
5.9-7.9
23-29
24-30
25-31
1.5
2.25
3
133-143
132-142
131-141
310-330
290-310
270-290
8-13
8-13
9-14
8-13
7-12
5-10
20.5-22.5
15.2-17.2
9.9-11.9
19-25
19-25
19-25
123-133
130-140
137-147
344-364
354-374
361-381
9-14
9-14
9-14
9-14
9-14
9-14
15-17
11.5-13.5
7.9-9.9
28-35
29-36
30-37
70
1.5
2.25
3
138-148
137-147
136-146
396-416
374-394
352-372
7-12
7-12
7-12
7-12
6-11
4-9
19.2-21.2
14.3-16.3
9.3-11.3
18-24
18-24
18-24
165-175
175-185
185-195
390-410
401-421
413-433
13-18
15-20
17-22
8-13
8-13
8-13
19.6-21.6
15-17
10.3-12.3
37-45
38-46
39-47
90
1.5
2.25
3
144-154
143-153
142-152
497-517
472-492
447-467
7-12
7-12
7-12
5-10
4-9
3-8
18-20
13.3-15.3
8.5-10.5
17-23
17-23
17-23
110
*Based on 15% Methanol antifreeze solution
35
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Unit Operating Conditions
Table 11: HT Series Typical Unit Operating Pressures and Temperatures: Continued
HT060
Full Load Cooling - without HWG active
Full Load Heating - without HWG active
Water
Temp
Entering
Water
Air
Temp
Rise °F
DB
Water
Flow
Suction
Pressure
PSIG
Discharge
Air Temp Suction Discharge
Drop °F Pressure Pressure Superheat Subcooling
Water
Temp
°F
Temp
Rise
°F
Pressure Superheat Subcooling
PSIG
Drop
°F
GPM/ton
DB
PSIG
PSIG
1.5
2.25
3
66-76
69-79
72-82
282-302
285-305
289-309
10-16
10-16
10-16
9-14
9-14
10-15
8-10
6-8
4-6
19-25
19-25
20-26
30*
50
1.5
2.25
3
128-138
126-136
125-135
238-258
222-242
205-225
16-21
21-26
26-31
14-19
13-18
12-17
20.5-22.5
14.9-16.9
9.2-11.2
21-27
21-27
21-27
90-100
95-105
99-109
310-330
313-333
316-336
11-17
11-17
11-17
12-17
12-17
12-17
11.3-13.3
8.5-10.5
5.7-7.7
24-30
25-31
26-32
1.5
2.25
3
135-145
134-144
133-143
315-335
296-316
276-296
10-15
12-17
15-20
14-19
13-18
11-16
21-23
15.5-17.5
10-12
22-28
22-28
22-28
115-125
120-130
126-136
337-357
341-361
345-365
12-18
12-18
12-18
14-19
14-19
15-20
14-16
10.6-12.6
7.3-9.3
28-35
29-36
30-37
70
1.5
2.25
3
139-149
138-148
138-148
408-428
386-406
364-384
10-15
10-15
10-15
15-20
13-18
11-16
20.1-22.1
14.8-16.8
9.5-11.5
21-27
21-27
21-27
157-167
161-171
166-176
390-410
394-414
398-418
15-20
15-20
15-20
14-19
14-19
15-20
18.2-20.2
13.9-15.9
9.6-11.6
37-45
38-46
39-47
90
1.5
2.25
3
144-154
143-153
142-152
515-535
493-513
469-489
8-13
8-13
8-13
14-19
13-18
12-17
19-21
14-16
9-11
20-26
20-26
20-26
110
*Based on 15% Methanol antifreeze solution
HT070
Full Load Cooling - without HWG active
Full Load Heating - without HWG active
Entering Water
Water
Air
Temp
Drop °F
DB
Water
Temp Temp
Drop
°F
Air
Suction Discharge
Pressure Pressure Superheat Subcooling
Suction Discharge
Pressure Pressure Superheat Subcooling
Water
Temp
°F
Flow
GPM/
ton
Temp
Rise
°F
Rise
°F DB
PSIG
PSIG
PSIG
PSIG
1.5
2.25
3
61-71
65-75
68-78
292-312
296-316
300-320
11-16
11-16
10-15
13-18
14-19
15-20
7.2-9.2
5.4-7.4
3.5-5.5
19-25
20-26
21-27
30*
1.5
2.25
3
131-141
130-140
129-139
210-230
205-225
200-220
10-15
11-16
13-18
12-17
12-17
12-17
18.5-20.5
14-16
9.5-11.5
22-28
23-29
24-30
89-99
98-108
106-116
327-347
337-357
348-368
10-15
10-15
10-15
19-24
14-19
9-14
10.9-12.9 26-32
8.3-10.3 28-34
50
5.7-7.7
30-36
1.5
2.25
3
135-145
131-141
128-138
300-320
295-315
290-310
10-15
11-16
13-18
15-20
14-19
14-19
17.6-19.6
13.8-15.8
10-12
23-29
23-29
23-29
119-129
132-142
144-154
365-385
380-400
395-415
10-15
10-15
10-15
21-26
16-21
11-16
14.7-16.7 33-39
11.3-13.3 36-42
70
7.9-9.9
38-44
1.5
2.25
3
139-149
137-147
135-145
390-410
370-390
350-370
10-15
10-15
10-15
16-21
14-19
13-18
16.7-18.7
12.6-14.6
8.5-10.5
22-28
22-28
22-28
162-172
172-182
182-192
418-438
430-450
444-464
10-15
10-15
11-16
19-24
19-24
19-24
19.4-21.4 43-49
14.7-16.7 45-51
10.1-12.1 47-53
90
1.5
2.25
3
145-155
145-155
144-154
490-510
470-490
452-472
10-15
10-15
9-14
16-21
14-19
13-18
15.9-17.9
11.7-13.7
7.4-9
20-27
20-27
20-27
110
*Based on 15% Methanol antifreeze solution
36
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Data — HT 024 - Full Load
850 CFM Nominal (ISO Rated) Airflow Cooling, 950 CFM Nominal (ISO Rated) Airflow Heating
Performance capacities shown in thousands of Btuh
Cooling - EAT 80/67°F
Heating - EAT 70°F
EWT
WPD
°F
WPD
PSI
GPM
CFM
EER
HR LWT HWC GPM
CFM
COP
LAT LWT HWC
TC SC kW
HC kW
HE
PSI
FT
FT
6.0
6.0
3.7
3.7
1.1
1.1
2.0
2.0
3.1
3.1
0.9
0.9
1.6
1.6
2.6
2.6
0.7
0.7
1.4
1.4
2.3
2.3
0.7
0.7
1.3
1.3
2.0
2.0
0.6
0.6
1.2
1.2
1.9
1.9
0.7
0.7
1.2
1.2
1.8
1.8
0.7
0.7
1.2
1.2
1.8
1.8
8.6
8.6
2.5
2.5
4.6
4.6
7.1
7.1
2.0
2.0
3.8
3.8
6.0
6.0
1.6
1.6
3.2
3.2
5.2
5.2
1.5
1.5
2.9
2.9
4.7
4.7
1.5
1.5
2.7
2.7
4.4
4.4
1.5
1.5
2.7
2.7
4.2
4.2
1.6
1.6
2.7
2.7
4.1
4.1
820 16.4 1.49
950 16.6 1.44
820 17.8 1.51
950 18.1 1.47
820 18.6 1.53
950 18.9 1.48
820 19.0 1.53
950 19.3 1.49
820 20.4 1.56
950 20.7 1.51
820 21.3 1.57
950 21.7 1.53
820 21.9 1.58
950 22.2 1.53
820 23.1 1.60
950 23.4 1.55
820 24.3 1.62
950 24.6 1.57
820 24.9 1.64
950 25.3 1.59
820 25.9 1.65
950 26.3 1.60
820 27.3 1.68
950 27.7 1.63
820 28.1 1.69
950 28.5 1.64
820 28.8 1.70
950 29.2 1.65
820 30.4 1.73
950 30.8 1.68
820 31.2 1.75
950 31.7 1.70
820 31.6 1.76
950 32.1 1.70
820 33.4 1.79
950 33.9 1.74
820 34.3 1.81
950 34.9 1.76
820 34.4 1.81
950 35.0 1.76
820 36.3 1.86
950 36.9 1.80
820 37.3 1.88
950 37.9 1.82
3.2
3.4
3.5
3.6
3.6
3.7
3.6
3.8
3.8
4.0
4.0
4.2
4.0
4.2
4.2
4.4
4.4
4.6
4.5
4.7
4.6
4.8
4.8
5.0
4.9
5.1
4.9
5.2
5.1
5.4
5.2
5.5
5.3
5.5
5.5
5.7
5.6
5.8
5.6
5.8
5.7
6.0
5.8
6.1
11.3 88.5
11.7 86.2
12.7 90.1
13.1 87.6
13.4 91.0
13.8 88.4
13.8 91.5
14.2 88.8
15.0 93.0
15.5 90.1
16.0 94.1
16.5 91.1
16.5 94.7
17.0 91.6
17.6 96.0
18.1 92.8
18.7 97.4
19.3 94.0
19.3 98.1
19.9 94.7
20.2 99.2
20.8 95.6
21.6 100.8 50.4
22.2 97.0 9.9
22.3 101.7 52.6
22.9 97.8 7.6
22.9 102.5 54.7
23.6 98.5 15.7
24.4 104.3 59.1
25.1 100.0 11.2
25.3 105.3 61.6
16.2
3.9
21.6
8.7
24.1
6.1
25.4
4.7
30.0
10.3
32.9
7.3
34.5
5.7
38.3
12.1
41.7
8.6
43.6
6.6
1.6
1.5
1.8
1.8
1.9
1.9
2.0
1.9
2.2
2.1
2.3
2.3
2.4
2.3
2.6
2.5
2.7
2.6
2.8
2.7
2.9
2.8
3.1
3.0
3.2
3.1
3.3
3.2
3.5
3.4
3.6
3.5
3.6
3.5
3.8
3.7
3.9
3.8
3.9
3.8
4.2
4.0
4.3
4.2
20
30
Operation not recommended
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
1.1
1.1
2.0
2.0
3.1
3.1
0.9
0.9
1.6
1.6
2.6
2.6
0.7
0.7
1.4
1.4
2.3
2.3
0.7
0.7
1.3
1.3
2.0
2.0
0.6
0.6
1.2
1.2
1.9
1.9
0.7
0.7
1.2
1.2
1.8
1.8
0.7
0.7
1.2
1.2
1.8
1.8
0.7
0.7
1.2
1.2
1.8
1.8
0.7
0.7
1.1
1.1
1.7
1.7
0.5
0.5
1.0
1.0
1.7
1.7
2.5
2.5
4.6
4.6
7.1
7.1
2.0
2.0
3.8
3.8
6.0
6.0
1.6
1.6
3.2
3.2
5.2
5.2
1.5
1.5
2.9
2.9
4.7
4.7
1.5
1.5
2.7
2.7
4.4
4.4
1.5
1.5
2.7
2.7
4.2
4.2
1.6
1.6
2.7
2.7
4.1
4.1
1.6
1.6
2.7
2.7
4.1
4.1
1.5
1.5
2.6
2.6
4.0
4.0
1.2
1.2
2.4
2.4
3.9
3.9
730 30.2 20.2 0.95 31.9 33.4 22.7
850 30.7 21.8 0.98 31.3 34.0 22.7
730 30.2 20.2 0.88 34.2 33.2 15.1
850 30.7 21.7 0.92 33.6 33.9 15.1
730 30.1 20.1 0.86 35.2 33.0 11.2
850 30.7 21.6 0.89 34.6 33.7 11.2
730 29.6 20.1 1.04 28.4 33.2 22.5
850 30.1 21.6 1.08 27.9 33.8 22.5
730 30.1 20.2 0.97 31.0 33.4 15.1
850 30.6 21.8 1.00 30.5 34.0 15.1
730 30.2 20.2 0.93 32.3 33.4 11.3
850 30.7 21.8 0.97 31.7 34.0 11.3
730 28.7 19.7 1.15 24.9 32.7 22.2
850 29.2 21.2 1.20 24.4 33.3 22.2
730 29.4 20.0 1.07 27.5 33.1 15.0
850 29.9 21.5 1.11 27.0 33.7 15.0
730 29.7 20.1 1.03 28.9 33.2 11.3
850 30.2 21.6 1.07 28.3 33.9 11.3
730 27.5 19.2 1.28 21.5 31.9 21.7
850 28.0 20.7 1.33 21.1 32.5 21.7
730 28.4 19.6 1.19 24.0 32.5 14.7
850 28.9 21.1 1.23 23.5 33.1 14.7
730 28.8 19.8 1.14 25.3 32.7 11.1
850 29.3 21.3 1.18 24.8 33.4 11.1
730 26.1 18.7 1.42 18.4 31.0 21.1
850 26.6 20.1 1.47 18.0 31.6 21.1
730 27.1 19.1 1.32 20.6 31.6 14.3
850 27.6 20.5 1.37 20.2 32.3 14.3
730 27.6 19.3 1.27 21.8 32.0 10.9
850 28.1 20.7 1.31 21.4 32.6 10.9
730 24.6 18.0 1.58 15.6 30.0 20.4
850 25.0 19.4 1.64 15.3 30.6 20.4
730 25.7 18.5 1.47 17.5 30.7 13.9
850 26.1 19.9 1.52 17.2 31.3 13.9
730 26.2 18.7 1.41 18.5 31.0 10.6
850 26.7 20.1 1.46 18.2 31.7 10.6
730 23.0 17.4 1.76 13.1 29.0 19.8
850 24.5 19.2 1.70 14.5 30.3 19.8
730 24.1 17.8 1.64 14.7 29.7 13.5
850 24.5 19.2 1.70 14.5 30.3 13.5
730 24.6 18.0 1.58 15.6 30.0 10.2
850 25.1 19.4 1.63 15.3 30.6 10.2
730 21.5 16.9 1.95 11.0 28.1 19.2
850 21.8 18.1 2.02 10.8 28.7 19.2
730 22.5 17.2 1.82 12.3 28.7 13.0
850 22.9 18.5 1.89 12.1 29.3 13.0
0.8
0.8
0.7
0.7
0.6
0.7
1.1
1.1
0.9
0.9
0.8
0.8
1.4
1.5
1.2
1.2
1.0
1.1
1.9
1.9
1.5
1.6
1.4
1.4
2.4
2.4
2.0
2.0
1.8
1.9
3.0
3.0
2.5
2.6
2.3
2.4
3.6
3.3
3.2
3.3
3.0
3.0
4.4
4.5
3.9
4.0
3.7
3.7
5.3
5.4
4.7
4.8
4.5
4.5
6.3
6.4
5.6
5.8
5.3
5.5
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
3.0
3.0
4.5
4.5
6.0
6.0
40
50
46.5
13.9
60
70
25.9 100.9
8.6
25.6 105.7 62.9
26.3 101.3 17.5
27.3 107.7 67.9
28.0 103.0 12.4
28.2 108.8 70.6
80
28.9 104.0
9.6
28.2 108.9 71.2
29.0 104.1 19.3
30.0 111.0 76.7
30.7 105.9 13.7
30.9 112.1 79.7
31.6 106.9 10.5
90
100
110
120
730 23.0 17.4 1.76 13.1 29.0
850 23.4 18.7 1.82 12.8 29.6
9.9
9.9
27.4 18.7
28.0 18.7
730 20.0 16.4 2.17
850 20.3 17.7 2.25
9.2
9.0
730 20.9 16.7 2.03 10.3 27.8 12.6
850 21.3 17.9 2.10 10.1 28.5 12.6
730 21.4 16.8 1.96 10.9 28.1
850 21.8 18.1 2.03 10.7 28.7
Operation not recommended
9.6
9.6
26.9 18.3
27.5 18.3
27.2 12.3
27.8 12.3
730 18.7 16.2 2.41
850 19.0 17.4 2.50
730 19.5 16.3 2.26
850 19.8 17.5 2.34
730 19.9 16.4 2.18
850 20.2 17.6 2.26
7.7
7.6
8.6
8.5
9.1
8.9
27.3
28.0
9.3
9.3
Interpolation is permissible; extrapolation is not.
Operation below 40°F EWT is based upon a 15% methanol antifreeze solution.
Operation below 60°F EWT requires optional insulated water/refrigerant circuit.
See performance correction tables for operating conditions other than those listed above.
For operation in the shaded areas, please see the Performance Data Selection Notes.
All entering air conditions are 80°F DB and 67°F WB in cooling, and 70°F DB in heating.
AHRI/ISO certified conditions are 80.6°F DB and 66.2°F WB in cooling and 68°F DB in heating.
Table does not reflect fan or pump power corrections for AHRI/ISO conditions.
All performance is based upon the lower voltage of dual voltage rated units.
37
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Data — HT 036 - Full Load
1250 CFM Nominal (ISO Rated) Airflow Cooling, 1250 CFM Nominal (ISO Rated) Airflow Heating
Performance capacities shown in thousands of Btuh
Cooling - EAT 80/67°F
Heating - EAT 70°F
EWT
WPD
°F
WPD
PSI
GPM
CFM
EER
HR LWT HWC GPM
CFM
COP
LAT LWT HWC
TC SC kW
HC kW
HE
PSI
FT
FT
9.0
9.0
8.3 19.1 1080 25.6 2.09
8.3 19.1 1250 26.0 2.02
3.6
3.8
3.9
4.0
4.0
4.2
4.1
4.3
4.3
4.5
4.4
4.6
4.5
4.7
4.6
4.9
4.8
5.0
4.9
5.1
5.0
5.2
5.1
5.4
5.2
5.4
5.2
5.5
5.4
5.6
5.5
5.7
5.5
5.7
5.6
5.9
5.7
6.0
5.7
6.0
5.9
6.1
5.9
6.2
18.5 91.9
19.1 89.2
20.7 93.9
21.3 91.0
21.9 95.1
22.6 92.0
22.6 95.7
23.3 92.5
24.4 97.3
25.2 94.0
25.9 98.7
26.7 95.2
26.7 99.5
27.5 95.8
28.2 100.8 37.5
29.0 97.0 12.9
29.9 102.4 41.1
30.7 98.4 9.1
30.8 103.3 43.1
31.7 99.2 7.0
15.9
4.2
20.8
9.5
23.5
6.7
25.0
5.2
29.1
11.2
32.3
7.9
34.1
6.1
2.1
2.1
2.4
2.4
2.6
2.5
2.7
2.6
2.9
2.9
3.1
3.0
3.2
3.2
3.4
3.3
3.7
3.6
3.8
3.7
3.9
3.8
4.2
4.1
4.3
4.2
4.4
4.3
4.7
4.5
4.8
4.7
4.9
4.7
5.2
5.0
5.3
5.2
5.3
5.2
5.6
5.5
5.8
5.6
20
30
Operation not recommended
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
2.6
2.6
6.0 1080 44.8 27.6 1.44 31.1 49.7 22.5
6.0 1250 45.6 29.7 1.49 30.5 50.6 22.5
4.5 10.5 1080 44.2 27.4 1.39 31.8 48.9 14.8
4.5 10.5 1250 44.9 29.5 1.44 31.2 49.9 14.8
6.9 16.0 1080 43.6 27.3 1.38 31.7 48.3 10.9
6.9 16.0 1250 44.4 29.3 1.43 31.1 49.3 10.9
1.1
1.1
0.9
0.9
0.8
0.8
1.4
1.5
1.1
1.2
1.0
1.0
1.9
2.0
1.5
1.6
1.4
1.4
2.6
2.7
2.1
2.1
1.9
1.9
3.4
3.5
2.8
2.9
2.5
2.6
4.3
4.4
3.6
3.7
3.3
3.4
5.3
4.7
4.6
4.7
4.3
4.3
6.5
6.7
5.7
5.8
5.3
5.4
7.9
8.0
7.0
7.1
6.6
6.7
9.4
9.6
8.4
8.6
7.9
8.1
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
4.5
4.5
6.8
6.8
9.0
9.0
2.6
2.6
6.0 1080 27.9 2.12
6.0 1250 28.3 2.05
4.5 10.5 1080 29.2 2.14
4.5 10.5 1250 29.7 2.07
6.9 16.0 1080 30.0 2.15
6.9 16.0 1250 30.4 2.08
2.0
2.0
3.8
3.8
4.7 1080 44.7 27.6 1.54 28.9 49.9 22.6
4.7 1250 45.4 29.6 1.60 28.4 50.9 22.6
8.7 1080 44.8 27.6 1.46 30.7 49.8 15.0
8.7 1250 45.6 29.7 1.51 30.1 50.8 15.0
2.0
2.0
3.8
3.8
4.7 1080 31.9 2.18
4.7 1250 32.4 2.12
8.7 1080 33.5 2.22
8.7 1250 34.0 2.15
40
50
5.9 13.6 1080 44.7 27.6 1.43 31.3 49.6 11.2
5.9 13.6 1250 45.5 29.7 1.48 30.7 50.5 11.2
5.9 13.6 1080 34.4 2.23
5.9 13.6 1250 34.9 2.16
1.7
1.7
3.2
3.2
3.9 1080 43.7 27.3 1.68 26.0 49.5 22.4
3.9 1250 44.5 29.3 1.75 25.5 50.4 22.4
7.5 1080 44.5 27.5 1.57 28.3 49.9 15.1
7.5 1250 45.3 29.6 1.63 27.7 50.8 15.1
1.7
1.7
3.2
3.2
3.9 1080 35.9 2.27
3.9 1250 36.5 2.20
7.5 1080 37.8 2.31
7.5 1250 38.4 2.24
5.2 11.9 1080 44.7 27.6 1.53 29.3 49.9 11.3
5.2 11.9 1250 45.5 29.7 1.58 28.8 50.9 11.3
5.2 11.9 1080 38.8 2.33
5.2 11.9 1250 39.4 2.26
1.5
1.5
2.9
2.9
3.5 1080 42.2 26.8 1.86 22.7 48.5 22.0
3.5 1250 42.9 28.8 1.93 22.3 49.5 22.0
6.7 1080 43.4 27.2 1.73 25.1 49.3 14.9
6.7 1250 44.1 29.2 1.79 24.7 50.2 14.9
1.5
1.5
2.9
2.9
3.5 1080 40.0 2.36
3.5 1250 40.6 2.29
6.7 1080 42.1 2.42
6.7 1250 42.8 2.34
31.9 104.3 45.8
32.8 100.1 14.6
33.9 106.1 50.0
34.8 101.7 10.3
34.9 107.1 52.2
60
4.7 10.8 1080 43.9 27.3 1.67 26.3 49.6 11.2
4.7 10.8 1250 44.6 29.4 1.73 25.9 50.5 11.2
4.7 10.8 1080 43.3 2.44
4.7 10.8 1250 43.9 2.37
35.8 102.5
8.0
1.5
1.5
2.7
2.7
3.4 1080 40.2 26.0 2.06 19.5 47.3 21.4
3.4 1250 40.9 28.0 2.14 19.2 48.2 21.4
6.3 1080 41.7 26.6 1.91 21.8 48.2 14.6
6.3 1250 42.4 28.6 1.98 21.4 49.2 14.6
1.5
1.5
2.7
2.7
3.4 1080 44.1 2.47
3.4 1250 44.8 2.39
6.3 1080 46.5 2.53
6.3 1250 47.2 2.45
35.7 107.8 54.1
36.6 103.2 16.3
37.8 109.8 58.8
38.8 104.9 11.5
39.0 111.0 61.3
70
4.4 10.1 1080 42.4 26.8 1.84 23.0 48.6 11.0
4.4 10.1 1250 43.1 28.8 1.91 22.6 49.6 11.0
4.4 10.1 1080 47.8 2.56
4.4 10.1 1250 48.5 2.48
40.0 105.9
8.9
1.5
1.5
2.7
2.7
4.2
4.2
1.5
1.5
2.6
2.6
4.1
4.1
1.5
1.5
2.6
2.6
4.1
4.1
1.4
1.4
2.5
2.5
4.0
4.0
1.1
1.1
2.4
2.4
3.9
3.9
3.4 1080 38.0 25.2 2.29 16.6 45.8 20.8
3.4 1250 38.6 27.1 2.37 16.3 46.7 20.8
6.2 1080 39.6 25.8 2.13 18.6 46.8 14.2
6.2 1250 40.3 27.7 2.20 18.3 47.8 14.2
9.7 1080 40.4 26.1 2.05 19.7 47.4 10.7
9.7 1250 41.1 28.1 2.12 19.4 48.3 10.7
3.5 1080 35.6 24.1 2.54 14.0 44.3 20.1
3.5 1250 37.9 26.7 2.45 15.4 46.2 20.1
6.1 1080 37.2 24.9 2.37 15.7 45.3 13.7
6.1 1250 37.9 26.7 2.45 15.4 46.2 13.7
9.5 1080 38.1 25.2 2.28 16.7 45.9 10.4
9.5 1250 38.7 27.1 2.36 16.4 46.8 10.4
3.5 1080 33.2 23.0 2.82 11.8 42.8 19.4
3.5 1250 33.7 24.8 2.92 11.6 43.7 19.4
6.1 1080 34.8 23.8 2.63 13.2 43.7 13.2
6.1 1250 35.4 25.6 2.73 13.0 44.7 13.2
9.4 1080 35.6 24.1 2.54 14.0 44.3 10.0
9.4 1250 36.2 26.0 2.63 13.7 45.2 10.0
1.5
1.5
2.7
2.7
4.2
4.2
1.5
1.5
2.6
2.6
4.1
4.1
3.4 1080 48.2 2.58
3.4 1250 49.0 2.50
6.2 1080 50.9 2.65
6.2 1250 51.6 2.56
9.7 1080 52.3 2.69
9.7 1250 53.1 2.60
3.5 1080 52.4 2.69
3.5 1250 53.2 2.60
6.1 1080 55.3 2.76
6.1 1250 56.1 2.68
9.5 1080 56.8 2.81
9.5 1250 57.7 2.72
39.4 111.3 62.5
40.4 106.3 18.0
41.8 113.6 67.6
42.9 108.2 12.7
43.1 114.8 70.4
80
44.2 109.3
9.8
43.2 114.9 70.8
44.3 109.4 19.7
45.8 117.4 76.4
47.0 111.6 13.9
47.3 118.7 79.5
48.4 112.7 10.8
90
100
110
120
3.2 1080 30.8 21.9 3.11
3.2 1250 31.4 23.5 3.23
9.9
9.7
41.5 18.8
42.4 18.8
Operation not recommended
5.9 1080 32.3 22.6 2.92 11.1 42.3 12.8
5.9 1250 32.9 24.3 3.03 10.9 43.2 12.8
9.2 1080 33.1 23.0 2.83 11.7 42.7
9.2 1250 33.7 24.7 2.93 11.5 43.6
9.7
9.7
40.4 18.4
41.4 18.4
41.0 12.4
41.9 12.4
2.6 1080 28.7 20.8 3.43
2.6 1250 29.2 22.3 3.55
5.4 1080 30.0 21.4 3.23
5.4 1250 30.5 23.1 3.35
8.9 1080 30.7 21.8 3.13
8.9 1250 31.2 23.4 3.25
8.4
8.2
9.3
9.1
9.8
9.6
41.4
42.3
9.4
9.4
Interpolation is permissible; extrapolation is not.
Operation below 40°F EWT is based upon a 15% methanol antifreeze solution.
Operation below 60°F EWT requires optional insulated water/refrigerant circuit.
See performance correction tables for operating conditions other than those listed above.
For operation in the shaded areas, please see the Performance Data Selection Notes.
All entering air conditions are 80°F DB and 67°F WB in cooling, and 70°F DB in heating.
AHRI/ISO certified conditions are 80.6°F DB and 66.2°F WB in cooling and 68°F DB in heating.
Table does not reflect fan or pump power corrections for AHRI/ISO conditions.
All performance is based upon the lower voltage of dual voltage rated units.
38
Download from Www.Somanuals.com. All Manuals Search And Download.
Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Data — HT 048 - Full Load
1550 CFM Nominal (ISO Rated) Airflow Cooling, 1650 CFM Nominal (ISO Rated) Airflow Heating
Performance capacities shown in thousands of Btuh
Cooling - EAT 80/67°F
Heating - EAT 70°F
EWT
WPD
°F
WPD
PSI
GPM
CFM
EER
HR LWT HWC GPM
CFM
COP
LAT LWT HWC
TC SC kW
HC kW
HE
PSI
FT
FT
12.0
12.0
6.0
6.0
9.0
9.0
12.0
12.0
6.0
6.0
9.0
5.2 12.1 1430 33.0 2.94
5.2 12.1 1650 33.5 2.85
3.3
3.4
3.4
3.6
3.5
3.7
3.6
3.7
3.7
3.9
3.8
4.0
3.9
4.1
4.0
4.2
4.2
4.4
4.3
4.5
4.4
4.6
4.5
4.7
4.6
4.8
4.7
4.9
4.8
5.0
4.9
5.1
4.9
5.2
5.1
5.3
5.1
5.4
5.1
5.4
5.2
5.5
5.3
5.5
23.0 91.4
23.8 88.8
25.2 93.0
26.1 90.3
26.5 93.9
27.3 91.0
27.1 94.4
28.1 91.5
29.5 96.1
30.4 93.0
31.2 97.3
32.1 94.0
32.1 97.9
33.1 94.6
34.3 99.5
35.3 95.9
36.4 101.0 41.9
37.5 97.2 8.3
37.5 101.8 43.7
38.7 98.0 6.4
39.4 103.1 46.9
40.5 99.1 13.5
41.9 104.9 50.7
43.1 100.7 9.6
43.3 105.9 52.8
44.5 101.5 7.4
16.2
4.0
21.6
8.7
24.1
6.1
25.5
4.7
30.2
10.1
33.1
7.1
34.7
5.5
3.4
3.3
3.6
3.5
3.6
3.5
3.7
3.6
3.8
3.7
3.9
3.8
4.0
3.9
4.1
4.0
4.3
4.1
4.3
4.2
4.5
4.3
4.7
4.5
4.8
4.6
4.9
4.7
5.1
5.0
5.2
5.1
5.3
5.2
5.6
5.4
5.8
5.6
5.8
5.6
6.2
6.0
6.4
6.2
20
30
Operation not recommended
6.0
6.0
9.0
1.2
1.2
2.7
2.7
2.8 1330 58.6 39.7 1.89 31.0 65.0 22.1
2.8 1550 59.6 42.6 1.96 30.4 66.3 22.1
6.4 1330 58.4 40.7 1.78 32.8 64.5 14.6
6.4 1550 59.4 43.8 1.85 32.2 65.7 14.6
1.8
1.8
1.8
1.8
1.8
1.9
2.0
2.0
1.8
1.9
1.8
1.8
2.3
2.4
2.0
2.1
1.9
2.0
2.9
2.9
2.5
2.5
2.3
2.3
3.6
3.7
3.1
3.1
2.8
2.9
4.5
4.5
3.8
3.9
3.6
3.6
5.5
4.9
4.8
4.9
4.5
4.6
6.7
6.9
5.9
6.1
5.6
5.7
8.2
8.4
7.3
7.4
6.8
7.0
9.9
10.1
8.8
9.0
8.3
8.5
1.2
1.2
2.7
2.7
2.8 1430 35.6 3.03
2.8 1650 36.1 2.94
6.4 1430 36.9 3.07
6.4 1650 37.5 2.98
9.0
12.0
12.0
6.0
6.0
9.0
4.7 10.8 1330 58.0 41.3 1.73 33.5 64.0 10.9
4.7 10.8 1550 59.0 44.4 1.80 32.9 65.2 10.9
4.7 10.8 1430 37.7 3.10
4.7 10.8 1650 38.3 3.00
1.0
1.0
2.4
2.4
4.2
4.2
0.9
0.9
2.2
2.2
3.9
3.9
0.8
0.8
2.0
2.0
3.6
3.6
0.8
0.8
2.0
2.0
3.5
3.5
0.8
0.8
1.9
1.9
3.4
3.4
0.8
0.8
1.9
1.9
3.3
3.3
0.8
0.8
1.9
1.9
3.3
3.3
0.8
0.8
1.8
1.8
3.3
3.3
0.7
0.7
1.8
1.8
3.2
3.2
2.3 1330 57.8 38.4 2.06 28.1 64.8 22.0
2.3 1550 58.8 41.3 2.13 27.6 66.1 22.0
5.6 1330 58.5 39.3 1.93 30.3 65.1 14.7
5.6 1550 59.5 42.3 2.00 29.7 66.3 14.7
9.7 1330 58.6 39.8 1.87 31.3 65.0 11.0
9.7 1550 59.6 42.8 1.94 30.7 66.2 11.0
2.0 1330 56.1 37.4 2.25 24.9 63.8 21.7
2.0 1550 57.1 40.2 2.33 24.4 65.0 21.7
5.1 1330 57.4 38.1 2.11 27.2 64.6 14.6
5.1 1550 58.4 41.0 2.18 26.7 65.9 14.6
9.0 1330 57.9 38.5 2.04 28.4 64.9 11.0
9.0 1550 58.9 41.4 2.11 27.9 66.1 11.0
1.9 1330 53.7 36.5 2.48 21.7 62.2 21.1
1.9 1550 54.7 39.2 2.57 21.3 63.4 21.1
4.7 1330 55.5 37.1 2.31 24.0 63.4 14.4
4.7 1550 56.4 39.9 2.40 23.6 64.6 14.4
8.4 1330 56.3 37.5 2.24 25.2 63.9 10.9
8.4 1550 57.2 40.3 2.32 24.7 65.1 10.9
1.8 1330 51.0 35.6 2.73 18.7 60.3 20.5
1.8 1550 51.8 38.2 2.83 18.3 61.5 20.5
4.5 1330 52.9 36.2 2.55 20.8 61.6 14.0
4.5 1550 53.9 38.9 2.64 20.4 62.9 14.0
8.1 1330 53.9 36.5 2.46 21.9 62.3 10.6
8.1 1550 54.8 39.3 2.55 21.5 63.5 10.6
1.8 1330 47.9 34.6 3.02 15.8 58.2 19.8
1.8 1550 48.7 37.2 3.13 15.5 59.4 19.8
4.4 1330 50.0 35.3 2.82 17.7 59.6 13.5
4.4 1550 50.8 37.9 2.92 17.4 60.8 13.5
7.8 1330 51.0 35.6 2.72 18.7 60.3 10.3
7.8 1550 51.9 38.3 2.82 18.4 61.5 10.3
1.9 1330 44.7 33.4 3.36 13.3 56.2 19.1
1.9 1550 47.6 36.8 3.25 14.6 58.7 19.1
4.4 1330 46.8 34.2 3.14 14.9 57.5 13.0
4.4 1550 47.6 36.8 3.25 14.6 58.7 13.0
1.0
1.0
2.4
2.4
4.2
4.2
0.9
0.9
2.2
2.2
3.9
3.9
0.8
0.8
2.0
2.0
3.6
3.6
0.8
0.8
2.0
2.0
3.5
3.5
0.8
0.8
1.9
1.9
3.4
3.4
0.8
0.8
1.9
1.9
3.3
3.3
2.3 1430 40.3 3.17
2.3 1650 40.9 3.07
5.6 1430 42.1 3.21
5.6 1650 42.8 3.11
9.7 1430 43.1 3.24
9.7 1650 43.8 3.14
2.0 1430 45.5 3.30
2.0 1650 46.2 3.20
5.1 1430 47.8 3.35
5.1 1650 48.5 3.25
9.0 1430 49.1 3.38
9.0 1650 49.8 3.28
1.9 1430 51.1 3.43
1.9 1650 51.9 3.33
4.7 1430 53.8 3.50
4.7 1650 54.7 3.39
8.4 1430 55.4 3.54
8.4 1650 56.2 3.43
1.8 1430 56.9 3.57
1.8 1650 57.7 3.46
4.5 1430 60.0 3.66
4.5 1650 61.0 3.54
8.1 1430 61.8 3.71
8.1 1650 62.7 3.59
1.8 1430 62.7 3.73
1.8 1650 63.7 3.62
4.4 1430 66.2 3.84
4.4 1650 67.2 3.72
7.8 1430 68.1 3.90
7.8 1650 69.2 3.78
1.9 1430 68.5 3.91
1.9 1650 69.5 3.79
4.4 1430 72.2 4.05
4.4 1650 73.3 3.92
7.7 1430 74.2 4.13
7.7 1650 75.4 4.00
40
50
9.0
9.0
12.0
12.0
6.0
6.0
9.0
12.0
12.0
6.0
6.0
9.0
38.6
11.8
9.0
9.0
12.0
12.0
6.0
6.0
9.0
12.0
12.0
6.0
6.0
9.0
60
9.0
9.0
12.0
12.0
6.0
6.0
9.0
12.0
12.0
6.0
6.0
9.0
44.7 106.8 55.1
45.9 102.4 15.3
47.6 108.9 59.4
48.9 104.2 10.9
49.1 110.0 61.8
70
9.0
9.0
12.0
12.0
6.0
6.0
9.0
12.0
12.0
6.0
6.0
9.0
50.5 105.2
8.4
50.0 110.6 63.3
51.3 105.7 17.1
53.1 112.9 68.2
54.5 107.7 12.1
54.8 114.1 70.9
80
9.0
9.0
12.0
12.0
6.0
6.0
9.0
12.0
12.0
6.0
6.0
9.0
9.0
12.0
12.0
56.3 108.8
9.4
55.1 114.3 71.6
56.6 109.0 18.9
58.4 116.8 77.0
60.0 111.2 13.3
60.1 118.1 80.0
61.7 112.3 10.3
90
9.0
12.0
12.0
6.0
6.0
9.0
7.7 1330 47.9 34.6 3.03 15.8 58.2
7.7 1550 48.7 37.2 3.14 15.5 59.4
1.9 1330 41.6 32.2 3.75 11.1 54.4 18.5
1.9 1550 42.4 34.6 3.88 10.9 55.6 18.5
4.3 1330 43.6 33.0 3.50 12.5 55.5 12.6
4.3 1550 44.3 35.5 3.62 12.2 56.7 12.6
9.9
9.9
100
110
120
9.0
12.0
12.0
6.0
6.0
9.0
7.6 1330 44.6 33.4 3.38 13.2 56.1
7.6 1550 45.4 35.9 3.50 13.0 57.3
9.6
9.6
53.1 18.1
54.3 18.1
1.8 1330 38.8 30.9 4.19
1.8 1550 39.5 33.2 4.35
9.2
9.1
4.3 1330 40.5 31.7 3.91 10.3 53.8 12.2
4.3 1550 41.2 34.1 4.06 10.2 55.0 12.2
7.5 1330 41.4 32.1 3.78 11.0 54.3
7.5 1550 42.1 34.5 3.92 10.8 55.5
Operation not recommended
9.0
12.0
12.0
6.0
6.0
9.0
9.0
12.0
12.0
9.2
9.2
52.5 17.9
53.7 17.9
52.7 12.0
53.9 12.0
1.6 1330 36.4 29.6 4.71
1.6 1550 37.0 31.8 4.88
4.1 1330 37.8 30.4 4.39
4.1 1550 38.4 32.6 4.55
7.4 1330 38.5 30.8 4.24
7.4 1550 39.2 33.1 4.39
7.7
7.6
8.6
8.4
9.1
8.9
53.0
54.2
9.0
9.0
Interpolation is permissible; extrapolation is not.
Operation below 40°F EWT is based upon a 15% methanol antifreeze solution.
Operation below 60°F EWT requires optional insulated water/refrigerant circuit.
See performance correction tables for operating conditions other than those listed above.
For operation in the shaded areas, please see the Performance Data Selection Notes.
All entering air conditions are 80°F DB and 67°F WB in cooling, and 70°F DB in heating.
AHRI/ISO certified conditions are 80.6°F DB and 66.2°F WB in cooling and 68°F DB in heating.
Table does not reflect fan or pump power corrections for AHRI/ISO conditions.
All performance is based upon the lower voltage of dual voltage rated units.
39
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Data — HT 060 - Full Load
1825 CFM Nominal (ISO Rated) Airflow Cooling, 2050 CFM Nominal (ISO Rated) Airflow Heating
Performance capacities shown in thousands of Btuh
Cooling - EAT 80/67°F
Heating - EAT 70°F
EWT
WPD
°F
WPD
PSI
GPM
CFM
EER
HR LWT HWC GPM
CFM
COP
LAT LWT HWC
TC SC kW
HC kW
HE
PSI
FT
FT
15.0
15.0
7.5
7.5
11.3
11.3
15.0
15.0
7.5
7.3 16.8 1750 42.8 3.89
7.3 16.8 2050 43.4 3.77
3.2
3.4
3.5
3.6
3.6
3.8
3.7
3.9
3.9
4.1
4.0
4.2
4.1
4.3
4.3
4.5
4.4
4.6
4.5
4.7
4.6
4.8
4.7
5.0
4.8
5.1
4.9
5.1
5.0
5.3
5.1
5.3
5.1
5.4
5.3
5.5
5.3
5.6
5.3
5.6
5.4
5.7
5.5
5.8
29.5 92.6
30.6 89.6
33.4 94.8
34.5 91.5
35.6 96.0
36.7 92.5
36.7 96.7
37.9 93.1
40.0 98.5
41.3 94.7
42.7 100.0 32.4
44.0 96.0 7.8
44.1 100.8 34.1
45.5 96.7 6.1
46.8 102.4 37.5
48.2 98.0 12.8
49.9 104.1 41.1
51.3 99.6 9.1
51.6 105.1 43.1
53.0 100.4 7.1
16.1
4.1
21.1
9.2
23.7
6.5
25.1
5.1
4.0
3.8
4.1
4.0
4.2
4.1
4.2
4.1
4.4
4.2
4.5
4.4
4.6
4.4
4.7
4.6
4.9
4.7
5.0
4.8
5.1
5.0
5.3
5.2
5.5
5.3
5.6
5.4
5.8
5.7
6.0
5.8
6.1
5.9
6.4
6.2
6.6
6.4
6.6
6.4
7.1
6.9
7.3
7.1
Operation not recommended
20
30
7.5
7.5
11.3
11.3
15.0
15.0
7.5
1.7
1.7
3.7
3.7
3.9 1590 75.3 49.7 2.68 28.1 84.4 22.9
3.9 1850 76.6 53.4 2.78 27.5 86.1 22.9
8.6 1590 74.9 50.3 2.57 29.1 83.6 15.2
8.6 1850 76.2 54.0 2.67 28.5 85.3 15.2
1.9
2.0
1.8
1.8
1.8
1.8
2.3
2.3
2.0
2.0
1.9
1.9
2.8
2.9
2.4
2.5
2.2
2.3
3.5
3.6
3.0
3.1
2.8
2.8
4.4
4.5
3.8
3.8
3.5
3.5
5.5
5.6
4.7
4.8
4.3
4.4
6.7
5.9
5.8
5.9
5.4
5.5
8.1
8.3
7.1
7.3
6.7
6.8
9.8
10.0
8.7
8.8
8.2
8.3
11.7
11.9
10.4
10.6
9.8
10.0
1.7
1.7
3.7
3.7
3.9 1750 46.9 3.95
3.9 2050 47.6 3.82
8.6 1750 49.1 3.98
8.6 2050 49.9 3.86
6.1 14.1 1590 74.2 50.5 2.53 29.3 82.9 11.3
6.1 14.1 1850 75.5 54.3 2.62 28.8 84.5 11.3
6.1 14.1 1750 50.4 4.00
6.1 14.1 2050 51.2 3.88
1.2
1.2
3.0
3.0
2.7 1590 74.4 48.8 2.86 26.0 84.2 22.9
2.7 1850 75.7 52.5 2.97 25.5 85.8 22.9
7.0 1590 75.2 49.5 2.72 27.6 84.5 15.3
7.0 1850 76.5 53.2 2.82 27.1 86.1 15.3
1.2
1.2
3.0
3.0
2.7 1750 53.9 4.06
2.7 2050 54.7 3.94
7.0 1750 56.7 4.12
7.0 2050 57.6 3.99
29.3
11.0
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
7.5
40
50
5.3 12.2 1590 75.3 49.8 2.66 28.3 84.3 11.5
5.3 12.2 1850 76.6 53.6 2.76 27.8 86.0 11.5
5.3 12.2 1750 58.3 4.15
5.3 12.2 2050 59.2 4.02
0.9
0.9
2.6
2.6
2.0 1590 72.4 47.8 3.08 23.5 82.9 22.5
2.0 1850 73.6 51.4 3.20 23.0 84.5 22.5
6.0 1590 74.0 48.6 2.91 25.4 84.0 15.2
6.0 1850 75.3 52.2 3.02 25.0 85.6 15.2
0.9
0.9
2.6
2.6
2.0 1750 61.1 4.21
2.0 2050 62.1 4.08
6.0 1750 64.5 4.28
6.0 2050 65.5 4.15
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
7.5
4.7 10.8 1590 74.6 48.9 2.83 26.3 84.3 11.5
4.7 10.8 1850 75.9 52.6 2.94 25.9 85.9 11.5
4.7 10.8 1750 66.3 4.32
4.7 10.8 2050 67.3 4.19
0.7
0.7
2.4
2.4
1.7 1590 69.5 46.7 3.35 20.7 81.0 22.0
1.7 1850 70.7 50.3 3.47 20.4 82.6 22.0
5.4 1590 71.7 47.6 3.15 22.8 82.5 15.0
5.4 1850 73.0 51.1 3.26 22.4 84.1 15.0
0.7
0.7
2.4
2.4
1.7 1750 68.5 4.37
1.7 2050 69.5 4.24
5.4 1750 72.3 4.46
5.4 2050 73.4 4.33
53.6 106.2 45.7
55.1 101.4 14.7
57.1 108.3 49.9
58.6 103.2 10.4
59.0 109.4 52.1
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
7.5
60
4.3 10.0 1590 72.7 48.0 3.05 23.8 83.1 11.3
4.3 10.0 1850 74.0 51.6 3.16 23.4 84.8 11.3
4.3 10.0 1750 74.4 4.52
4.3 10.0 2050 75.5 4.38
60.6 104.1
8.1
0.7
0.7
2.3
2.3
4.1
4.1
0.8
0.8
2.2
2.2
4.1
4.1
0.8
0.8
2.3
2.3
4.0
4.0
0.9
0.9
2.3
2.3
4.0
4.0
0.8
0.8
2.2
2.2
4.0
4.0
0.6
0.6
2.0
2.0
3.8
3.8
1.7 1590 66.1 45.5 3.67 18.0 78.7 21.4
1.7 1850 67.3 48.9 3.81 17.7 80.3 21.4
5.2 1590 68.6 46.4 3.43 20.0 80.4 14.6
5.2 1850 69.8 49.9 3.56 19.6 82.0 14.6
9.5 1590 69.9 46.9 3.32 21.0 81.2 11.0
9.5 1850 71.1 50.4 3.44 20.6 82.8 11.0
1.8 1590 62.5 44.1 4.05 15.4 76.3 20.8
1.8 1850 63.5 47.5 4.19 15.1 77.8 20.8
5.2 1590 65.1 45.1 3.78 17.2 78.0 14.1
5.2 1850 66.2 48.5 3.91 16.9 79.6 14.1
9.4 1590 66.4 45.6 3.65 18.2 78.8 10.7
9.4 1850 67.5 49.0 3.78 17.9 80.4 10.7
2.0 1590 58.7 42.6 4.49 13.1 74.0 20.2
2.0 1850 62.3 47.0 4.33 14.4 77.1 20.2
5.2 1590 61.3 43.7 4.18 14.7 75.5 13.7
5.2 1850 62.3 47.0 4.33 14.4 77.1 13.7
9.3 1590 62.6 44.2 4.03 15.5 76.4 10.4
9.3 1850 63.7 47.5 4.18 15.2 77.9 10.4
2.0 1590 55.2 41.1 5.00 11.0 72.3 19.7
2.0 1850 56.2 44.2 5.18 10.8 73.9 19.7
5.2 1590 57.5 42.1 4.65 12.4 73.4 13.3
5.2 1850 58.5 45.3 4.82 12.1 75.0 13.3
9.3 1590 58.8 42.6 4.48 13.1 74.1 10.1
9.3 1850 59.8 45.9 4.65 12.9 75.6 10.1
0.7
0.7
2.3
2.3
4.1
4.1
0.8
0.8
2.2
2.2
4.1
4.1
0.8
0.8
2.3
2.3
4.0
4.0
1.7 1750 75.8 4.55
1.7 2050 77.0 4.41
5.2 1750 80.1 4.67
5.2 2050 81.3 4.52
9.5 1750 82.4 4.73
9.5 2050 83.7 4.59
1.8 1750 83.1 4.75
1.8 2050 84.4 4.61
5.2 1750 87.8 4.89
5.2 2050 89.1 4.74
9.4 1750 90.3 4.97
9.4 2050 91.7 4.81
2.0 1750 90.3 4.97
2.0 2050 91.7 4.81
5.2 1750 95.2 5.12
5.2 2050 96.7 4.96
9.3 1750 97.9 5.21
9.3 2050 99.4 5.05
60.3 110.1 53.9
61.9 104.8 16.5
64.2 112.4 58.6
65.9 106.7 11.7
66.3 113.6 61.2
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
7.5
70
68.0 107.8
9.1
66.9 114.0 62.2
68.7 108.1 18.3
71.1 116.4 67.4
73.0 110.3 13.0
73.4 117.8 70.2
75.3 111.4 10.0
73.3 117.8 70.4
75.2 111.4 20.1
77.8 120.4 76.2
79.7 113.7 14.2
80.1 121.8 79.3
82.1 114.9 11.0
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
7.5
80
7.5
7.5
11.3
11.3
15.0
15.0
7.5
11.3
11.3
15.0
15.0
90
7.5
11.3
11.3
15.0
15.0
7.5
100
110
120
1.8 1590 52.2 39.6 5.60
1.8 1850 53.1 42.6 5.80
9.3
9.2
71.3 19.4
72.9 19.4
7.5
11.3
11.3
15.0
15.0
7.5
5.1 1590 54.1 40.6 5.20 10.4 71.8 13.1
5.1 1850 55.0 43.6 5.39 10.2 73.4 13.1
9.2 1590 55.2 41.1 5.01 11.0 72.3
9.2 1850 56.1 44.2 5.19 10.8 73.8
Operation not recommended
9.8
9.8
71.5 19.5
73.1 19.5
71.2 12.9
72.8 12.9
1.3 1590 50.0 38.5 6.30
1.3 1850 50.8 41.4 6.53
4.7 1590 51.3 39.2 5.83
4.7 1850 52.2 42.1 6.04
8.8 1590 52.1 39.6 5.62
8.8 1850 53.0 42.6 5.82
7.9
7.8
8.8
8.6
9.3
9.1
7.5
11.3
11.3
15.0
15.0
71.3
72.9
9.7
9.7
Interpolation is permissible; extrapolation is not.
Operation below 40°F EWT is based upon a 15% methanol antifreeze solution.
Operation below 60°F EWT requires optional insulated water/refrigerant circuit.
See performance correction tables for operating conditions other than those listed above.
For operation in the shaded areas, please see the Performance Data Selection Notes.
All entering air conditions are 80°F DB and 67°F WB in cooling, and 70°F DB in heating.
AHRI/ISO certified conditions are 80.6°F DB and 66.2°F WB in cooling and 68°F DB in heating.
Table does not reflect fan or pump power corrections for AHRI/ISO conditions.
All performance is based upon the lower voltage of dual voltage rated units.
40
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Data — HT 070 - Full Load
1950 CFM Nominal (Rated) Airflow Cooling, 2100 CFM Nominal (Rated) Airflow Heating
P erformance capacities shown in thousands of Btuh
Cooling - EAT 80/67°F
Heating - EAT 70°F
EWT
WPD
°F
WPD
PSI
GPM
CFM
EER
HR LWT HWC GPM
CFM
COP
LAT LWT HWC
TC SC kW
HC kW
HE
PSI
FT
FT
17.0
17.0
8.5
8.5
12.8
12.8
17.0
17.0
8.5
8.9 20.6 1750 46.6 4.66
8.9 20.6 2050 47.3 4.52
2.9
3.1
3.2
3.3
3.3
3.4
3.3
3.5
3.5
3.7
3.6
3.8
3.7
3.9
3.8
4.0
3.9
4.1
4.0
4.2
4.1
4.3
4.2
4.4
4.3
4.5
4.3
4.5
4.4
4.6
4.5
4.7
4.5
4.7
4.6
4.9
4.7
4.9
4.7
4.9
4.8
5.1
4.9
5.1
30.7 94.7
31.9 91.4
35.3 97.3
36.6 93.7
37.5 98.6
38.8 94.8
38.7 99.2
40.1 95.3
42.4 101.4 30.0
43.9 97.2 10.3
45.0 102.9 32.9
46.5 98.5 7.3
46.4 103.7 34.5
47.9 99.2 5.6
49.4 105.4 38.4
50.9 100.7 12.0
52.3 107.1 41.8
53.9 102.1
53.8 108.0 43.7
55.5 102.9 6.5
56.2 109.4 46.8
57.9 104.1 13.6
59.4 111.3 50.7
61.2 105.8
61.2 112.3 52.8
63.0 106.7 7.4
62.9 113.3 55.2
64.8 107.6 15.2
66.6 115.5 59.6
68.5 109.4 10.7
68.6 116.7 61.9
16.4
3.8
21.7
8.6
24.1
6.1
25.4
4.7
5.2
5.0
5.4
5.2
5.5
5.4
5.6
5.5
5.9
5.7
6.1
5.9
6.2
6.1
6.5
6.3
6.8
6.6
7.0
6.8
7.3
7.1
7.7
7.4
7.9
7.7
8.1
7.9
8.6
8.4
8.9
8.7
9.1
8.8
9.8
9.5
10.1
9.8
10.2
9.9
11.0
10.7
11.4
11.1
Operation not recommended
20
30
8.5
8.5
12.8
12.8
17.0
17.0
8.5
2.2
2.2
5.1 1590 82.4 50.1 3.04 27.1 92.8 22.2
5.1 1850 83.8 53.9 3.15 26.6 94.6 22.2
4.6 10.6 1590 82.3 50.0 2.90 28.4 92.2 14.7
4.6 10.6 1850 83.7 53.8 3.00 27.9 93.9 14.7
7.6 17.6 1590 81.9 49.8 2.84 28.9 91.6 11.0
7.6 17.6 1850 83.3 53.5 2.94 28.3 93.3 11.0
3.6
3.7
3.6
3.7
3.6
3.7
3.9
4.0
3.6
3.7
3.6
3.7
4.5
4.6
4.0
4.1
3.8
3.9
5.4
5.6
4.7
4.8
4.4
4.5
6.7
6.8
5.8
5.9
5.4
5.5
8.2
8.4
7.1
7.3
6.6
6.7
10.0
9.0
8.8
9.0
8.2
8.4
12.2
12.5
10.8
11.0
10.1
10.3
14.7
15.0
13.1
13.4
12.3
12.6
17.6
18.0
15.8
16.1
14.9
15.2
2.2
2.2
5.1 1750 51.6 4.77
5.1 2050 52.4 4.63
4.6 10.6 1750 54.0 4.83
4.6 10.6 2050 54.8 4.68
7.6 17.6 1750 55.3 4.86
7.6 17.6 2050 56.1 4.71
1.6
1.6
3.9
3.9
3.8 1590 81.3 49.8 3.27 24.9 92.4 22.2
3.8 1850 82.7 53.5 3.39 24.4 94.3 22.2
8.9 1590 82.2 50.1 3.09 26.6 92.8 14.8
8.9 1850 83.6 53.9 3.21 26.1 94.6 14.8
1.6
1.6
3.9
3.9
3.8 1750 59.4 4.96
3.8 2050 60.3 4.80
8.9 1750 62.1 5.02
8.9 2050 63.1 4.87
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
8.5
40
50
6.7 15.5 1590 82.4 50.1 3.02 27.3 92.7 11.1
6.7 15.5 1850 83.8 53.9 3.13 26.8 94.5 11.1
6.7 15.5 1750 63.6 5.06
6.7 15.5 2050 64.6 4.90
1.3
1.3
3.4
3.4
3.0 1590 79.1 49.0 3.54 22.3 91.2 21.9
3.0 1850 80.5 52.6 3.67 21.9 93.0 21.9
7.8 1590 80.8 49.6 3.34 24.2 92.2 14.7
7.8 1850 82.2 53.3 3.46 23.8 94.0 14.7
1.3
1.3
3.4
3.4
3.0 1750 66.9 5.14
3.0 2050 67.9 4.99
7.8 1750 70.1 5.23
7.8 2050 71.2 5.07
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
8.5
8.5
6.0 13.9 1590 81.5 49.8 3.24 25.1 92.5 11.1
6.0 13.9 1850 82.9 53.6 3.36 24.7 94.3 11.1
6.0 13.9 1750 71.8 5.27
6.0 13.9 2050 72.9 5.11
1.2
1.2
3.1
3.1
2.7 1590 76.1 47.8 3.87 19.6 89.3 21.4
2.7 1850 77.4 51.4 4.01 19.3 91.1 21.4
7.1 1590 78.3 48.7 3.63 21.6 90.7 14.5
7.1 1850 79.7 52.3 3.76 21.2 92.5 14.5
1.2
1.2
3.1
3.1
2.7 1750 74.4 5.34
2.7 2050 75.5 5.18
7.1 1750 78.0 5.44
7.1 2050 79.2 5.28
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
8.5
60
9.6
5.6 13.0 1590 79.3 49.1 3.52 22.6 91.3 11.0
5.6 13.0 1850 80.7 52.7 3.64 22.2 93.1 11.0
5.6 13.0 1750 80.0 5.50
5.6 13.0 2050 81.2 5.33
1.1
1.1
3.0
3.0
2.6 1590 72.4 46.3 4.26 17.0 87.0 20.9
2.6 1850 73.7 49.8 4.42 16.7 88.7 20.9
6.8 1590 75.0 47.4 3.98 18.9 88.6 14.2
6.8 1850 76.3 50.9 4.12 18.5 90.4 14.2
1.1
1.1
3.0
3.0
2.6 1750 81.9 5.56
2.6 2050 83.2 5.38
6.8 1750 86.0 5.68
6.8 2050 87.3 5.50
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
8.5
70
5.4 12.4 1590 76.3 47.9 3.85 19.8 89.4 10.7
5.4 12.4 1850 77.6 51.5 3.99 19.5 91.2 10.7
5.4 12.4 1750 88.2 5.75
5.4 12.4 2050 89.5 5.57
70.5 110.4
8.3
1.2
1.2
2.9
2.9
2.7 1590 68.4 44.7 4.72 14.5 84.5 20.3
2.7 1850 69.5 48.1 4.89 14.2 86.2 20.3
6.7 1590 71.2 45.8 4.40 16.2 86.2 13.8
6.7 1850 72.4 49.3 4.56 15.9 88.0 13.8
1.2
1.2
2.9
2.9
2.7 1750 89.5 5.79
2.7 2050 90.9 5.61
6.7 1750 94.1 5.93
6.7 2050 95.5 5.75
69.8 117.4 63.6
71.7 111.0 16.9
73.9 119.8 68.4
75.9 113.2 11.9
76.1 121.1 71.0
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
8.5
80
5.2 12.1 1590 72.6 46.4 4.24 17.1 87.1 10.5
5.2 12.1 1850 73.8 49.9 4.40 16.8 88.8 10.5
5.2 12.1 1750 96.7 6.02
5.2 12.1 2050 98.1 5.83
78.2 114.3
9.2
1.2
1.2
2.9
2.9
2.8 1590 64.1 43.0 5.26 12.2 82.0 19.7
2.8 1850 68.1 47.4 5.07 13.4 85.4 19.7
6.7 1590 67.0 44.1 4.89 13.7 83.6 13.4
6.7 1850 68.1 47.4 5.07 13.4 85.4 13.4
1.2
1.2
2.9
2.9
2.8 1750 97.3 6.04
2.8 2050 98.8 5.85
6.7 1750 102.6 6.22
6.7 2050 104.1 6.03
76.7 121.5 72.0
78.8 114.6 18.5
81.3 124.3 77.2
83.6 117.0 13.1
83.9 125.8 80.1
86.2 118.4 10.1
8.5
8.5
12.8
12.8
17.0
17.0
8.5
12.8
12.8
17.0
17.0
90
5.2 12.0 1590 68.4 44.7 4.71 14.5 84.5 10.1
5.2 12.0 1850 69.6 48.1 4.88 14.2 86.3 10.1
5.2 12.0 1750 105.5 6.32
5.2 12.0 2050 107.1 6.12
1.2
1.2
2.9
2.9
2.8 1590 59.8 41.2 5.88 10.2 79.9 19.2
2.8 1850 60.9 44.3 6.09 10.0 81.6 19.2
6.7 1590 62.6 42.3 5.46 11.5 81.2 13.0
6.7 1850 63.7 45.5 5.66 11.2 83.0 13.0
8.5
12.8
12.8
17.0
17.0
8.5
100
110
120
5.2 12.0 1590 64.0 42.9 5.27 12.2 82.0
5.2 12.0 1850 65.1 46.2 5.46 11.9 83.8
9.9
9.9
78.2 18.8
80.0 18.8
79.2 12.7
81.0 12.7
9.6
9.6
77.4 18.6
79.2 18.6
77.8 12.5
79.6 12.5
1.1
1.1
2.9
2.9
2.6 1590 55.7 39.5 6.61
2.6 1850 56.7 42.5 6.85
6.6 1590 58.3 40.6 6.13
6.6 1850 59.3 43.6 6.36
8.4
8.3
9.5
9.3
8.5
12.8
12.8
17.0
17.0
8.5
Operation not recommended
5.1 11.8 1590 59.6 41.1 5.91 10.1 79.8
5.1 11.8 1850 60.7 44.2 6.12
9.9
7.0
6.8
7.8
7.7
8.3
8.2
81.6
0.9
0.9
2.7
2.7
2.1 1590 52.0 38.1 7.45
2.1 1850 52.9 41.0 7.72
6.2 1590 54.2 39.0 6.91
6.2 1850 55.2 41.9 7.16
8.5
12.8
12.8
17.0
17.0
5.0 11.5 1590 55.5 39.4 6.65
5.0 11.5 1850 56.4 42.4 6.90
78.2
80.0
9.4
9.4
Interpolation is permissible; extrapolation is not.
Operation below 40°F EWT is based upon a 15% methanol antifreeze solution.
Operation below 60°F EWT requires optional insulated water/refrigerant circuit.
See performance correction tables for operating conditions other than those listed above.
For operation in the shaded areas, please see the Performance Data Selection Notes.
All entering air conditions are 80°F DB and 67°F WB in cooling, and 70°F DB in heating.
AHRI/ISO certified conditions are 80.6°F DB and 66.2°F WB in cooling and 68°F DB in heating.
Table does not reflect fan or pump power corrections for AHRI/ISO conditions.
All performance is based upon the lower voltage of dual voltage rated units.
41
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Preventive Maintenance
Water Coil Maintenance
months to minimize the problem. The condensate pan may also
need to be cleaned periodically to insure indoor air quality. The
condensate drain can pick up lint and dirt, especially with dirty
filters. Inspect the drain twice a year to avoid the possibility of
plugging and eventual overflow.
(Direct ground water applications only) - If the system is installed
in an area with a known high mineral content (125 P.P.M. or
greater) in the water, it is best to establish a periodic maintenance
schedule with the owner so the coil can be checked regularly.
Consult the well water applications section of this manual for a
more detailed water coil material selection. Should periodic coil
cleaning be necessary, use standard coil cleaning procedures,
which are compatible with the heat exchanger material and
copper water lines. Generally, the more water flowing through
the unit, the less chance for scaling. Therefore, 1.5 gpm per ton
[2.0 l/m per kW] is recommended as a minimum flow. Minimum
flow rate for entering water temperatures below 50°F [10°C] is 2.0
gpm per ton [2.6 l/m per kW].
Compressor
Conduct annual amperage checks to insure that amp draw is no
more than 10% greater than indicated on the serial plate data.
Fan Motors
All units have lubricated fan motors. Fan motors should never be
lubricated unless obvious, dry operation is suspected. Periodic
maintenance oiling is not recommended, as it will result in dirt
accumulating in the excess oil and cause eventual motor failure.
Conduct annual dry operation check and amperage check to
insure amp draw is no more than 10% greater than indicated on
serial plate data.
Water Coil Maintenance
(All other water loop applications)
Generally water coil maintenance is not needed for closed loop
systems. However, if the piping is known to have high dirt or
debris content, it is best to establish a periodic maintenance
schedule with the owner so the water coil can be checked
regularly. Dirty installations are typically the result of deterioration
of iron or galvanized piping or components in the system.
Open cooling towers requiring heavy chemical treatment and
mineral buildup through water use can also contribute to higher
maintenance. Should periodic coil cleaning be necessary, use
standard coil cleaning procedures, which are compatible with both
the heat exchanger material and copper water lines. Generally,
the more water flowing through the unit, the less chance for
scaling. However, flow rates over 3 gpm per ton (3.9 l/m per kW)
can produce water (or debris) velocities that can erode the heat
exchanger wall and ultimately produce leaks.
Air Coil
The air coil must be cleaned to obtain maximum performance.
Check once a year under normal operating conditions and, if
dirty, brush or vacuum clean. Care must be taken not to damage
the aluminum fins while cleaning. CAUTION: Fin edges are sharp.
Cabinet
Do not allow water to stay in contact with the cabinet for long
periods of time to prevent corrosion of the cabinet sheet metal.
Generally, vertical cabinets are set up from the floor a few inches
[7 - 8 cm] to prevent water from entering the cabinet. The cabinet
can be cleaned using a mild detergent.
Refrigerant System
Hot Water Generator Coils
To maintain sealed circuit integrity, do not install service gauges
unless unit operation appears abnormal. Reference the operating
charts for pressures and temperatures. Verify that air and water
flow rates are at proper levels before servicing the refrigerant
circuit.
See water coil maintenance for ground water units. If the potable
water is hard or not chemically softened, the high temperatures
of the desuperheater will tend to scale even quicker than the
water coil and may need more frequent inspections. In areas with
extremely hard water, a HWG is not recommended.
Filters
Filters must be clean to obtain maximum performance. Filters
should be inspected every month under normal operating
conditions and be replaced when necessary. Units should never
be operated without a filter.
Washable, high efficiency, electrostatic filters, when dirty, can
exhibit a very high pressure drop for the fan motor and reduce
air flow, resulting in poor performance. It is especially important
to provide consistent washing of these filters (in the opposite
direction of the normal air flow) once per month using a high
pressure wash similar to those found at self-serve car washes.
Condensate Drain
In areas where airborne bacteria may produce a “slimy”
substance in the drain pan, it may be necessary to treat the drain
pan chemically with an algaecide approximately every three
42
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Troubleshooting
CXM Troubleshooting Process Flowchart/Functional
Troubleshooting Chart
General
If operational difficulties are encountered, perform the preliminary
checks below before referring to the troubleshooting charts.
• Verify that the unit is receiving electrical supply power.
• Make sure the fuses in the fused disconnect switches
are intact.
After completing the preliminary checks described above,
inspect for other obvious problems such as leaking connections,
broken or disconnected wires, etc. If everything appears to
be in order, but the unit still fails to operate properly, refer to
the “CXM Troubleshooting Process Flowchart” or “Functional
Troubleshooting Chart.”
The “CXM Functional Troubleshooting Process Flowchart”
is a quick overview of how to start diagnosing a suspected
problem, using the fault recognition features of the CXM board.
The “Functional Troubleshooting Chart” on the following page
is a more comprehensive method for identifying a number of
malfunctions that may occur, and is not limited to just the CXM
controls. Within the chart are five columns:
• The “Fault” column describes the symptoms.
• Columns 2 and 3 identify in which mode the fault is likey to
occur, heating or cooling.
• The “Possible Cause column” identifies the most likely sources
of the problem.
• The “Solution” column describes what should be done to
correct the problem.
CXM Board
CXM board troubleshooting in general is best summarized as
simply verifying inputs and outputs. After inputs and outputs
have been verified, board operation is confirmed and the problem
must be elsewhere. Below are some general guidelines for
troubleshooting the CXM control.
ꢀ WARNING! ꢀ
WARNING! HAZARDOUS VOLTAGE! DISCONNECT
ALL ELECTRIC POWER INCLUDING REMOTE
DISCONNECTS BEFORE SERVICING.
Failure to disconnect power before servicing can cause
severe personal injury or death.
Field Inputs
All inputs are 24VAC from the thermostat and can be verified
using a volt meter between C and Y, G, O, W. 24VAC will be
present at the terminal (for example, between “Y” and “C”) if the
thermostat is sending an input to the CXM board.
Sensor Inputs
All sensor inputs are ‘paired wires’ connecting each component to
the board. Therefore, continuity on pressure switches, for example
can be checked at the board connector.
The thermistor resistance should be measured with the
connector removed so that only the impedance of the thermistor
is measured. If desired, this reading can be compared to the
thermistor resistance chart shown in the CXM AOM manual. An
ice bath can be used to check calibration of the thermistor.
Outputs
The compressor relay is 24VAC and can be verified using a
voltmeter. The fan signal is passed through the board to the
external fan relay (units with PSC motors only). The alarm relay
can either be 24VAC as shipped or dry contacts for use with
DDC controls by clipping the JW1 jumper. Electric heat outputs
are 24VDC “ground sinking” and require a volt meter set for DC
to verify operation. The terminal marked “24VDC” is the 24VDC
supply to the electric heat board; terminal “EH1” is stage 1 electric
heat; terminal “EH2” is stage 2 electric heat. When electric heat
is energized (thermostat is sending a “W” input to the CXM
controller), there will be 24VDC between terminal “24VDC” and
“EH1” (stage 1 electric heat) and/or “EH2” (stage 2 electric heat).
A reading of 0VDC between “24VDC” and “EH1” or “EH2” will
indicate that the CXM board is NOT sending an output signal to
the electric heat board.
Test Mode
Test mode can be entered for 20 minutes by shorting the test
pins. The CXM board will automatically exit test mode after 20
minutes.
43
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
CXM Process Flow Chart
ꢀ WARNING! ꢀ
WARNING! HAZARDOUS VOLTAGE! DISCONNECT
ALL ELECTRIC POWER INCLUDING REMOTE
DISCONNECTS BEFORE SERVICING.
Failure to disconnect power before servicing can cause
severe personal injury or death.
CXM Functional
Troubleshooting Flow Chart
Start
Did Unit
Attempt to
Start?
Check Main
power (see power
problems)
No
Yes
Did Unit
Lockout at
Start-up?
Yes
Check fault LED code
on control board
No fault
shown
No
See “Unit
short
cycles”
See
LP/LOC
Fault
See FP1
Fault
Yes
Yes
Yes
Unit Short
Cycles?
See HP
Fault
Replace
CXM
No
See FP2
Fault
See
See Over/
Under
Voltage
See “Only
Fan Runs”
Only Fan
Runs?
Condensate
Fault
No
Only
Compressor
Runs?
See “Only
Comp
Runs”
No
Did unit lockout
after a period of
operation?
Yes
No
Does unit
operate in
cooling?
See “Does
not Operate
in Clg”
No
Yes
Unit is OK!
‘See Performance
Troubleshooting’ for
further help
44
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Functional Troubleshooting
Fault
Htg Clg Possible Cause
Solution
Check line voltage circuit breaker and disconnect.
Check for line voltage between L1 and L2 on the contactor.
Check for 24VAC between R and C on CXM/DXM'
Check primary/secondary voltage on transformer.
Check pump operation or valve operation/setting.
Check water flow adjust to proper flow rate.
X
X
Green Status LED Off
Main power problems
X
X
Reduced or no water flow in cooling
Water Temperature out of range in cooling
Bring water temp within design parameters.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Dirty Air Coil- construction dust etc.
HP Fault
Code 2
X
Reduced or no air flow in heating
High Pressure
Too high of external static. Check static vs blower table.
Bring return air temp within design parameters.
Check superheat/subcooling vs typical operating condition table.
Check switch continuity and operation. Replace.
Check for refrigerant leaks
X
X
X
X
Air temperature out of range in heating
Overcharged with refrigerant
Bad HP Switch
X
X
X
Insufficient charge
LP/LOC Fault
Code 3
X
X
Compressor pump down at start-up
Check charge and start-up water flow.
Low Pressure / Loss of Charge
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace..
Check water flow adjust to proper flow rate.
Check antifreeze density with hydrometer.
Reduced or no water flow in heating
LT1 Fault
Code 4
X
X
Inadequate antifreeze level
Improper temperature limit setting (30°F vs
10°F [-1°C vs -2°C])
Clip JW3 jumper for antifreeze (10°F [-12°C]) use.
Water coil low
temperature limit
X
X
Water Temperature out of range
Bad thermistor
Bring water temp within design parameters.
X
X
Check temp and impedance correlation per chart
Check for dirty air filter and clean or replace.
Reduced or no air flow in cooling
Check fan motor operation and airflow restrictions.
Too high of external static. Check static vs blower table.
Too much cold vent air? Bring entering air temp within design parameters.
LT2 Fault
Code 5
X
X
Air Temperature out of range
Air coil low
temperature limit
Improper temperature limit setting (30°F vs
10°F [-1°C vs -12°C])
Normal airside applications will require 30°F [-1°C] only.
X
X
X
X
X
X
Bad thermistor
Blocked drain
Improper trap
Check temp and impedance correlation per chart.
Check for blockage and clean drain.
Check trap dimensions and location ahead of vent.
Check for piping slope away from unit.
Check slope of unit toward outlet.
X
Poor drainage
Condensate Fault
Code 6
Poor venting. Check vent location.
X
X
X
Moisture on sensor
Plugged air filter
Check for moisture shorting to air coil.
X
x
Replace air filter.
Restricted Return Air Flow
Find and eliminate restriction. Increase return duct and/or grille size.
Check power supply and 24VAC voltage before and during operation.
Check power supply wire size.
Over/Under
Voltage Code 7
X
X
X
X
Under Voltage
Check compressor starting. Need hard start kit?
Check 24VAC and unit transformer tap for correct power supply voltage.
Check power supply voltage and 24VAC before and during operation.
Check 24VAC and unit transformer tap for correct power supply voltage.
Check for poor air flow or overcharged unit.
(Auto resetting)
X
X
Over Voltage
Heating mode FP2>125°F [52°C]
Unit Performance Sentinel
Code 8
Cooling Mode FP1>125°F [52°C] OR FP2<
40ºF [4ºC])
Check for poor water flow, or air flow.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
No compressor operation
Compressor overload
Control board
See "Only Fan Operates".
Check and replace if necessary.
No Fault Code Shown
Unit Short Cycles
Reset power and check operation.
Dirty air filter
Check and clean air filter.
Unit in "test mode"
Unit selection
Reset power or wait 20 minutes for auto exit.
Unit may be oversized for space. Check sizing for actual load of space.
Check and replace if necessary
Compressor overload
Thermostat position
Unit locked out
Ensure thermostat set for heating or cooling operation.
Check for lockout codes. Reset power.
Check compressor overload. Replace if necessary.
Compressor Overload
Only Fan Runs
Check thermostat wiring at heat pump. Jumper Y and R for compressor operation
in test mode.
X
X
Thermostat wiring
Thermostat wiring
X
X
X
X
Check G wiring at heat pump. Jumper G and R for fan operation
Jumper G and R for fan operation. Check for Line voltage across BR contacts.
Fan motor relay
Only Compressor Runs
X
X
X
X
Check fan power enable relay operation (if present).
Check for line voltage at motor. Check capacitor.
Fan motor
Check thermostat wiring at heat pump. Jumper Y and R for compressor operation
in test mode
X
X
Thermostat wiring
Set for cooling demand and check 24VAC on RV coil and at CXM/DXM board.
X
Reversing valve
If RV is stuck, run high pressure up by reducing water flow and while operating
engage and disengage RV coil voltage to push valve.
X
X
Thermostat setup
Thermostat wiring
Check for ‘O’ RV setup not ‘B’.
Unit Doesn’t Operate
in Cooling
Check O wiring at heat pump. Jumper O and R for RV coil ‘click’.
Put thermostat in cooling mode. Check 24 VAC on O (check between C and
O); check for 24 VAC on W (check between W and C). There should be voltage
on O, but not on W. If voltage is present on W, thermostat may be bad or wired
incorrectly.
X
Thermostat wiring
45
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Performance Troubleshooting
Performance Troubleshooting
Htg Clg Possible Cause
Solution
X
X
Dirty filter
Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high of external static. Check static vs. blower table.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high of external static. Check static vs. blower table.
X
Reduced or no air flow in heating
X
X
Reduced or no air flow in cooling
Insufficient capacity/ Not
Check supply and return air temperatures at the unit and at distant duct registers
if significantly different, duct leaks are present.
X
Leaky duct work
cooling or heating
X
X
X
X
X
X
X
X
X
Low refrigerant charge
Check superheat and subcooling per chart.
Restricted metering device
Defective reversing valve
Thermostat improperly located
Unit undersized
Check superheat and subcooling per chart. Replace.
Perform RV touch test.
X
X
X
X
Check location and for air drafts behind stat.
Recheck loads & sizing. Check sensible clg. load and heat pump capacity.
Perform scaling check and clean if necessary.
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Scaling in water heat exchanger
Inlet water too hot or too cold
X
Reduced or no air flow in heating
Reduced or no water flow in cooling
Check fan motor operation and air flow restrictions.
Too high of external static. Check static vs. blower table.
Check pump operation or valve operation/setting.
Check water flow. Adjust to proper flow rate.
X
X
High Head Pressure
Inlet water too hot
Check load, loop sizing, loop backfill, ground moisture.
Bring return air temperature within design parameters.
Perform scaling check and clean if necessary.
Check superheat and subcooling. Re-weigh in charge.
Vacuum system and re-weigh in charge.
X
Air temperature out of range in heating
Scaling in water heat exchanger
Unit overcharged
X
X
X
X
X
X
X
Non-condensables in system
Restricted metering device.
Check superheat and subcooling per chart. Replace.
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
X
X
Reduced water flow in heating.
Water temperature out of range.
Reduced air flow in cooling.
Check water flow. Adjust to proper flow rate.
Bring water temperature within design parameters.
Check for dirty air filter and clean or replace.
Low Suction Pressure
X
Check fan motor operation and air flow restrictions.
Too high of external static. Check static vs. blower table.
Too much cold vent air? Bring entering air temperature within design parameters.
Check for refrigerant leaks.
X
X
Air temperature out of range
Insufficient charge
Too high of air flow
Poor performance
Too high of air flow
Unit oversized
X
X
X
Check fan motor speed selection and air flow chart.
See ‘Insufficient Capacity’
Low Discharge Air Temperature
in Heating
X
X
Check fan motor speed selection and airflow chart.
Recheck loads & sizing. Check sensible clg load and heat pump capacity.
High humidity
46
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Installation, Operation & Maintenance
HTV/HTD/HTH SERIES
Heat Controller, Inc.
Troubleshooting Form
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Note: Never connect refrigerant gauges during startup procedures. Conduct water-side analysis using P/T ports to determine water
flow and temperature difference. If water-side analysis shows poor performance, refrigerant troubleshooting may be required. Connect
refrigerant gauges as a last resort.
47
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*97B00
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01-2013
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