INSTALLATION
INSTRUCTIONS
STELLAR
AIR CONDITIONING UNIT
SPLIT-SYSTEM COOLING
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GROUND INSTALLATION . . . . . . . . . . . . . . . . . . . . . 3
ROOF INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 3
UNIT PLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
VERIFY INDOOR REFRIGERANT ORIFICE . . . . . . . 4
INSTALLATIONS REQUIRING TXV . . . . . . . . . . . . . 4
PIPING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PRECAUTIONS DURING LINE INSTALLATION . . . . 5
PRECAUTIONS DURING BRAZING OF LINES. . . . . 6
PRECAUTIONS DURING BRAZING
ANGLE VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . 6 & 7
GENERAL INFORMATION & GROUNDING . . . . . . . . . . 8
FIELD CONNECTIONS POWER WIRING . . . . . . . . . . . . 8
FIELD CONNECTIONS CONTROL WIRING . . . . . . . . . . 8
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . 8
MEASUREMENT METHOD . . . . . . . . . . . . . . . . . . . . 9
SUPERHEAT CHARGING METHOD . . . . . . . . . . . . 9
SYSTEM START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ENERGIZE CRANKCASE HEATER . . . . . . . . . . . . . 9
SYSTEM CONTROLLER - HDB076 ONLY . . . . . . . 13
INSTRUCTING THE OWNER. . . . . . . . . . . . . . . . . . 13
INDICATIONS OF PROPER OPERATION . . . . . . . 13
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
MODELS: 10 SEER
11 SEER
H*DB012 - 76
H*DE024 - 60
H*DH018 - 60
H*DA018-076
12 SEER
50 Hz
CAUTION: READ ALL SAFETY GUIDES BEFORE
YOU BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
035-14562-000 REV A (999)
Form 550.38-N1Y (999)
®
550.38-N1Y
TO
WEATHERPROOF
DISCONNECT
SWITCH
THERMOSTAT
BLOWER
MOTOR
RELAY
48” OVERHEAD
CLEARANCE
REQUIRED
TO POWER
SUPPLY
12” REAR
AND SIDES
CLEARANCE
REQUIRED
NEC CLASS 1
WIRING
Sit unit on
rubber
NEC CLASS 2
WIRING
elevator
grommets
to reduce
noise and
allow for
proper
TO
COIL
drainage.
NOTE: ALL OUTDOOR WIRING
MUST BE WEATHERPROOF
24” SERVICE
ACCESS CLEARANCE
REQUIRED
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT
FIGURE 1: TYPICAL INSTALLATION
LOCATION
Normal operating sound levels may be objectionable if the
unit is placed directly under windows of certain rooms (bed-
rooms, study, etc.).
Before starting the installation, select and check the suitability
of the location for both the indoor and outdoor unit. Observe
all limitations and clearance requirements.
ROOF INSTALLATION
When installing units on a roof, the structure must be capable
of supporting the total weight of the unit, including a pad, lin-
tels, rails, etc., which should be used to minimize the trans-
mission of sound or vibration into the conditioned space.
The outdoor unit must have sufficient clearance for air
entrance to the condenser coil, for air discharge and for ser-
vice access. See Figure 1.
If the unit is to be installed on a hot sun exposed roof or a
black-topped ground area, the unit should be raised suffi-
ciently above the roof or ground to avoid taking the accumu-
lated layer of hot air into the outdoor unit.
UNIT PLACEMENT
1. Provide a base in the pre-determined location.
2. Remove the shipping carton and inspect for possible
damage.
Provide an adequate structural support.
3. Compressor tie-down bolts should remain tightened.
4. Position the unit on the base provided.
GROUND INSTALLATION
The unit may be installed at ground level on a solid base that
will not shift or settle, causing strain on the refrigerant lines
and possible leaks. Maintain the clearances shown in Figure
1 and install the unit in a level position. Isolate the base from
the structure to avoid noise or vibration transmission.
5. Sit unit on the (4) rubber elevating grommets if provided.
Use grommet kit 1SG0601 if not provided. These should
be positioned as shown in Figure 2 to reduce noise and
allow for proper drainage.
Isolate the unit from rain gutters to avoid any possible wash
out of the foundation.
6. Make a hole(s) in the structure wall large enough to
accommodate the insulated vapor line, the liquid line and
the wiring.
Unitary Products Group
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550.38-N1Y
Coil is under 30 PSIG helium pressure. Relieve pres-
sure from schrader valve on liquid line side.
This fitting is a right-hand thread, turn counter-clock-
wise to remove.
1. First, relieve the holding charge by depressing the
Schrader valve located in the end of the liquid line.
2. Remove the liquid line fitting using 3/4" wrenches, and
remove the pre-installed orifice with a small diameter
wire or paper clip.
3. Remove the new orifice from the packet and verify that it
is the correct number required. Install this orifice with the
rounded end toward the coil and the flat end outward per
Figure 3 on page 4.
4. Thread the liquid line fitting back in place on the coil.
Tighten the fitting hand tight and turn an additional 1/8
turn to seal.
FIGURE 2 : POSITIONING GROMMETS
VERIFY INDOOR REFRIGERANT ORIFICE
Refer to the Tabular Data Sheet for the outdoor unit model
and installed evaporator coil. Determine the correct orifice for
that combination.
If the orifice sizes match, nothing further is required and the
refrigerant lines may be connected per the outdoor unit
instruction. However, if another orifice should be used,
change the orifice in the coil with the following procedure:
Use 3/4" wrenches to turn fittings. Using pliers will
cause internal damage to the fitting.
NOTE: This procedure should be done within 2 minutes to
keep air and contaminates from entering the coil. If the
orifice cannot be replaced and the coil resealed within
2 minutes, then it should be temporarily closed to air
using masking tape (short term delay) or plugging/cap-
ping (long term delay). There is no need to purge the
coil if this procedure is done within the time limit.
5. Mark the data plate of the coil with the orifice installed.
INSTALLATIONS REQUIRING TXV
For installations requiring a TXV, the following are the basic
steps for installion. For detailed instructions, refer to the
Installation Instructions accompanying the TXV kit.
Install TXV kit as follows:
FIGURE 3 : ORIFICE INSTALLATION
1. First, relieve the holding charge by depressing the
Schrader valve located in the end of the liquid line.
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550.38-N1Y
Ensure the bulb is making maximum contact. Refer to TXV
installation instruction for view of bulb location.
The evaporator coil is under 30 psig pressure.
2. After holding charge is completely discharged, loosen
and remove the liquid line fitting from the orifice distributor
assembly. Note that the fitting has right hand threads.
In all cases, mount the TXV bulb after vapor line is
brazed and has had sufficient time to cool.
3. Remove the orifice from the distributor body using a
small diameter wire or paper clip. Orifice is not used
when the TXV assembly is installed.
a. Bulb should be installed on a horizontal run of the
vapor line if possible. On lines under 7/8" OD the
bulb may be installed on top of the line. With 7/8"
OD and over, the bulb should be installed at the
position of about 4 or 8 o'clock.
4. After orifice is removed, install the thermal expansion
valve to the orifice distributor assembly with supplied fit-
tings. Hand tighten and turn an additional 1/8 turn to
seal. Do not overtighten fittings.
b. If bulb installation is made on a vertical run, the bulb
should be located at least 16 inches from any bend,
and on the tubing sides opposite the plane of the
bend. On vertical bulb installations, the bulb should
be positioned with the bulb tail at the top, so that the
bulb acts as a reservoir.
5. Reinstall the liquid line to the top of the thermal expan-
sion valve. Hand modify the liquid line to align with cas-
ing opening.
6. Install the TXV equalizer line into the vapor line as follows:
c. Bulb should be insulated using thermal insulation
provided to protect it from the effect of the surround-
ing ambient temperature.
a. Select a location on the vapor line for insertion of the
equalizer line which will not interfere with TXV bulb
placement.
b. Use an awl to punch through the suction tube and
insert the awl to a depth to achieve a 1/8 inch diam-
eter hole.
PIPING CONNECTIONS
The outdoor condensing unit may be connected to the indoor
evaporator coil using field supplied refrigerant grade copper
tubing that is internally clean and dry. Units should be
installed only with the tubing sizes for approved system com-
binations as specified in Tabular Data Sheet. The charge
given is applicable for total tubing lengths up to 15 feet. See
Application Data Form 690.01-AD1V for installing tubing of
longer lengths and elevation differences.
7. Install TXV equalizer line in 1/8 hole previously made in
vapor line. Equalizer line can be bottomed out in vapor
line as end of equalizer line is cut on 45 degrees angle to
prevent blockage. Braze equalizer line making sure that
tube opening is not brazed closed.
NOTE: Using a larger than specified line size could result in oil
return problems. Using too small a line will result in loss
of capacity and other problems caused by insufficient
refrigerant flow. Slope horizontal vapor lines at least 1"
every 20 feet toward the outdoor unit to facilitate proper
oil return.
Dry nitrogen should always be supplied through the
tubing while it is being brazed, because the tempera-
ture required is high enough to cause oxidation of the
copper unless an inert atmosphere is provided. The
flow of dry nitrogen should continue until the joint has
cooled. Always use a pressure regulator and safety
valve to insure that only low pressure dry nitrogen is
introduced into the tubing. Only a small flow is neces-
sary to displace air and prevent oxidation.
PRECAUTIONS DURING LINE INSTALLATION
1. Install the lines with as few bends as possible. Care must
be taken not to damage the couplings or kink the tubing.
Use clean hard drawn copper tubing where no apprecia-
ble amount of bending around obstruction is necessary.
If soft copper must be used, care must be taken to avoid
sharp bends which may cause a restriction.
All connections to be brazed are copper-to-copper and
should be brazed with a phosphorous-copper alloy material
such as Silfos-5 or equivalent. DO NOT use soft solder.
2. The lines should be installed so that they will not obstruct
service access to the coil, air handling system or filter.
Install the TXV bulb to the vapor line near the equalizer line,
using the two bulb clamps furnished with the TXV assembly.
3. Care must also be taken to isolate the refrigerant lines to
minimize noise transmission from the equipment to the
structure.
Unitary Products Group
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550.38-N1Y
4. The vapor line must be insulated with a minimum of 1/2"
foam rubber insulation (Arm-A-Flex or equivalent). Liquid
lines that will be exposed to direct sunlight and/or high
temperatures must also be insulated.
Dry nitrogen should always be supplied through the
tubing while it is being brazed, because the tempera-
ture required is high enough to cause oxidation of the
copper unless an inert atmosphere is provided. The
flow of dry nitrogen should continue until the joint has
cooled. Always use a pressure regulator and safety
valve to insure that only low pressure dry nitrogen is
introduced into the tubing. Only a small flow is neces-
sary to displace air and prevent oxidation.
Tape and suspend the refrigerant lines as shown. DO NOT
allow metal-to metal contact. See Figure 4.
5. Use PVC piping as a conduit for all underground installa-
tions as shown in Figure 5. Buried lines should be kept
as short as possible to minimize the build up of liquid
refrigerant in the vapor line during long periods of shut-
down.
TAPE
The outdoor units have re-usable service valves on both the
liquid and vapor connections. The total system refrigerant
charge is retained within the outdoor unit during shipping and
installation. The re-usable service valves are provided to
evacuate and charge per this instruction.
L I QUI D
L I NE
INCORRECT
Serious service problems can be avoided by taking adequate
precautions to assure an internally clean and dry system.
SHEET METAL HANGER
CORRECT
INSULATED VAPOR LINE
PRECAUTIONS DURING BRAZING ANGLE VALVE
Precautions should be taken to prevent heat damage to
angle valve by wrapping a wet rag around it as shown in Fig-
ure 6. Also, protect all painted surfaces and insulation during
brazing. After brazing - cool joint with wet rag.
FIGURE 4 : TUBING HANGER
TO INDOOR COIL
TO OUTDOOR UNIT
CAP
LIQUID LINE
INSULATED
VAPOR LINE
PVC
This is not a backseating valve. The service access
port has a valve core. Opening or closing valve does
not close service access port.
CONDUIT
If the valve stem is backed out past the retaining ring,
the O-ring can be damaged causing leakage or sys-
tem pressure could force the valve stem out of the
valve body possibly causing personal injury. In the
event the retaining ring is missing, do not attempt to
open the valve.
FIGURE 5 : UNDERGROUND INSTALLATION
6. Pack fiber glass insulation and a sealing material such
as permagum around refrigerant lines where they pen-
etrate a wall to reduce vibration and to retain some
flexibility.
Connect the refrigerant lines using the following procedure:.
1. Remove the cap and Schrader core from both the liquid
and vapor angle valve service ports at the outdoor unit.
Connect low pressure nitrogen to the liquid line service
port.
7. See Form 690.01-AD1V for additional piping information.
PRECAUTIONS DURING BRAZING OF LINES
2. Braze the liquid line to the liquid valve at the outdoor
unit. Be sure to wrap the valve body with a wet rag. Allow
the nitrogen to continue flowing.
All outdoor unit and evaporator coil connections are copper-
to-copper and should be brazed with a phosphorous-copper
alloy material such as Silfos-5 or equivalent. DO NOT use
soft solder.
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®
550.38-N1Y
7. Replace the schrader cores in the liquid and vapor
valves.
8. Evacuate the vapor line, evaporator and the liquid line, to
500 microns or less.
9. Leak test all refrigerant piping connections including the
service port flare caps to be sure they are leak tight. DO
NOT OVERTIGHTEN (between 40 and 60 inch - lbs.
maximum).
NOTE: Do not use the system refrigerant in the outdoor unit to
purge or leak test.
10. Replace caps on service ports. Do not remove the flare
caps from the service ports except when necessary for
servicing the system.
FIGURE 6 : HEAT PROTECTION
Do not connect manifold gauges unless trouble is
suspected. Approximately 3/4 ounce of refrigerant
will be lost each time a standard manifold gauge
is connected.
If visual verification of the valve stem reaching the
retaining ring is impossible, stop backing outthe.valve
stem when the slightest increase in resistance is felt.
Because of the small size and therefore the reduced
resistance, back out the liquid valve 5 turns maximum
to prevent going past the retaining ring.
11. Release the refrigerant charge into the system. Open
both the liquid and vapor valves by removing the plunger
cap and with an allen wrench back out counter-clockwise
until valve stem just touches retaining ring. Release the
refrigerant charge into the system. See “PRECAUTIONS
DURING BRAZING ANGLE VALVE” on page 6.
3. Carefully remove the brazed plugs from the evaporator
liquid and vapor connections after relieving the pressure
in the evaporator.
Replace plunger cap finger tight, then tighten an additional
1/12 turn (1/2 hex flat). Cap must be replaced to prevent
leaks.
If a leak is suspected, leak test to locate the leak. To verify
the leak, close the valve to the vacuum pump suction to iso-
late the pump and hold the system under vacuum. If the
micron gauge indicates a steady and continuous rise after a
few minutes, it's an indication of a leak. If the gauge shows a
rise, then levels off after a few minutes and remains fairly
constant, its an indication that the system is leak free, but still
contains moisture and may require further evacuation if the
reading is above 1000 microns.
The evaporator is pressurized.
4. Braze the liquid line to the evaporator liquid connection.
Thenitrogenshouldnowbeflowingthroughtheevaporator
coil.
12. If the refrigerant tubing, indoor evaporator coil or outdoor
condensing unit has developed a leak during shipment,
or was, for any other reason, opened to the atmosphere
for more than four (4) minutes, it is necessary to evacu-
5. Slide the grommet away from the vapor connection at
the coil. Braze the vapor line to the evaporator vapor
connection. After the connection has cooled, slide the
grommet back into original position.
6. Protect the vapor valve of the outdoor unit with a wet rag
and braze the vapor line connection. The nitrogen flow
should be exiting the system from the vapor service port
connection. After this connection has cooled, remove the
nitrogen source from the liquid fitting service port.
Unitary Products Group
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550.38-N1Y
ate the system down to at least 500 microns to eliminate
contamination and moisture in the system.
POWER
WIRING
CONTROL
WIRING
LOW VOLTAGE
JUNCTION BOX
GROUND
LUG
Never attempt to repair any brazed connections while
the system is under pressure. Personal injury could
result.
See “SYSTEM START-UP” on page 9 for checking and
recording system charge.
GENERAL INFORMATION & GROUNDING
Check the electrical supply to be sure that it meets the values
specified on the unit nameplate and wiring label.
All outdoor wiring must
be weatherproof. Use
copper conductors only.
Power wiring, control (low voltage) wiring, disconnect
switches and over current protection to be supplied by the
installer. Wire size should be sized per NEC requirements.
FIGURE 7 : TYPICAL FIELD WIRING
2. The complete connection diagram and schematic wiring
label is located on the inside surface of the unit electrical
box cover.
3. All field wiring to be in accordance with national electrical
codes (NEC) and/or local-city codes.
All field wiring must USE COPPER CONDUCTORS
ONLY and be in accordance with Local, National Fire,
Safety & Electrical Codes. This unit must be grounded
with a separate ground wire in accordance with the
above codes.
NOTE: A Start Assist Kit is available and recommended for
long line set applications or in areas of known low volt-
ageproblems. Ahardstartkitmustbeusedifasolenoid
valve accessory or non-bleed type expansion device is
installed.
The complete connection diagram and schematic wiring label
is located on the inside surface of the unit electrical box cover
and this instruction.
4. Mount the thermostat about 5 ft. above the floor, where it
will be exposed to normal room air circulation. Do not
place it on an outside wall or where it is exposed to the
radiant effect from exposed glass or appliances, drafts
from outside doors or supply air grilles.
FIELD CONNECTIONS POWER WIRING
1. Install the proper size weatherproof disconnect switch
outdoors and within sight of the unit.
5. Route the 24-volt control wiring (NEC Class 2) from the
outdoor unit to the indoor unit and thermostat.
2. Run power wiring from the disconnect switch to the unit.
NOTE: To eliminate erratic operation, seal the hole in the wall
at the thermostat with permagum or equivalent to pre-
vent air drafts affecting the anticipators in the thermo-
stat.
3. Remove the control box cover to gain access to the unit
wiring. Route wires from disconnect through power wir-
ing opening provided and into the unit control box as
shown in Figure 7.
SYSTEM CHARGE
4. Install the proper size time-delay fuses or circuit breaker,
and make the power supply connections.
The factory charge in the outdoor unit includes enough
charge for the unit and a most sold matched evaporator.
Some indoor coil matches may require some additional
charge. See Tabular Data sheet provided in unit literature
packet.
5. Energize the crankcase heater to save time by preheat-
ing the compressor oil while the remaining installation is
completed.
FIELD CONNECTIONS CONTROL WIRING
Sweat connect units also include sufficient charge for 15 feet
of lines. See Tabular Data for charge adder for line lengths
greater than 15 feet.
1. Route low voltage wiring into bottom of control box as
shown in Figure 7. Make low voltage wiring connections
inside the junction box per Figures 8, 9, 10 or 11.
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550.38-N1Y
The “TOTAL SYSTEM CHARGE” must be permanently
stamped on the unit data plate.
1. Operate system until temperatures and pressures stabi-
lize (minimum of 10 minutes).
2. Measure and record indoor wet bulb (WB) temperature
using a sling psychrometer and the outdoor dry bulb
(DB) temperature using a thermometer.
Total system charge is determined as follows:
1. Determine outdoor unit charge from tabular data sheet.
3. Measure and record the suction pressure at the suction
service valve port.
2. Determine indoor coil adjustment from tabular data
sheet.
4. Using Table 1 on page 12, note the superheat value cor-
responding to the intersection of the indoor wet bulb and
the outdoor dry bulb.
3. Calculate the line charge using the Tabular Data Sheet.
a. Calculate total length of pre-charged lines for quick
connect units.
5. With the superheat value obtained in step 4 and the suc-
tion pressure value from step 3, find the intersection of
the values in Table 2 on page 12. This is the required
suction tube temperature at the suction service valve.
b. Calculate over 15 feet of sweat lines for sweat con-
nect units.
NOTE: The charge for pre-charged lines should be included
in the system charge shown on the data plate but need
not be added to the system. If sweat connect lines are
used, the line charge over 15 feet should be included
on the data plate and must be added to the system.
6. To bring the tube temperature in line with the required
value from Table 2, add refrigerant to the service port to
cause the tube temperature to fall and reclaim refrigerant
to cause the temperature to rise.
Check flare caps on Schrader fittings to be sure they are
tight. DO NOT OVERTIGHTEN (40-60 inch-lbs. maximum).
4. Total system charge = item 1 + item 2 + item 3.
5. Permanently stamp the unit data plate with the total
amount of refrigerant in the system.
SYSTEM START-UP
Use one of the following charging methods whenever addi-
tional refrigerant is required for the system charge.
ENERGIZE CRANKCASE HEATER
If this unit is equipped with a crankcase heater for the com-
pressor, a warning label with an adhesive back is supplied in
the unit installation instruction packet. This label should be
attached to the field supplied disconnect switch where it will
be easily seen. See below:
Refrigerant charging should only be carried out by a
qualified air conditioning contractor.
In order to energize the crankcase heater:- Set indoor two
stage cooling thermostat to "OFF" position.- Close the line
power disconnect to the unit.
Measurement Method
IMPORTANT
If a calibrated charging cylinder or accurate weighing device
is available, add refrigerant accordingly.
An attempt to start the compressor without at least 8
hours of crankcase heat will damage the compressor
Compressor damage will occur ifsystem is improperly
charged. On new system installations charge system
per tabular data sheet for the matched coil and follow
guidelines in this instruction.
Check flare caps on service ports to be sure they are leak
tight. DO NOT OVERTIGHTEN (between 40 and 60 inch -
lbs. maximum).
Superheat Charging Method
NOTE: Use this method only during system maintenace and
repair.
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550.38-N1Y
GROUND.
LUG
FIGURE 8 : TYPICAL SINGLE PHASE FIELD WIRING
FIGURE 9 : TYPICAL THREE PHASE FIELD WIRING
10
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550.38-N1Y
A
L
L
F
I
E
L
D
W
I
R
I
N
G
T
O
B
E
I
N
A
C
C
O
R
D
A
N
C
E
W
I
T
H
FIGURE 10 : TYPICAL FIELD WIRING - AIR HANDLER (H*DB076 & H*DA076 ONLY)
ALL FIELD WIRING TO BE IN ACCORDANCE WITH NATIONAL ELECTRICAL CODE (NEC) AND/OR LOCAL CODES
POWER WIRING
208/230-3-60
460-3-60
380/415-3-50
575-3-60
POWER
CONTROL
FACTORY
FURNACE TERMINAL BLOCK
Y
R
W
C
G
24 VOLT
CONTROL
WIRING
L1
L2
OUTDOOR
SECTION
Y
R
G
W
R
ROOM THERMOSTAT
BRN
YEL
C
Y
GROUND
SCREW
X
ALL OUTDOOR WIRING MUST BE WEATHERPROOF. USE COPPER CONDUCTORS ONLY.
FIGURE 11 : TYPICAL FIELD WIRING - FURNACE (H*DB076 & H*DA076 ONLY)
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550.38-N1Y
Table 1: SUPERHEAT VALUE
OUTDOOR DB F
°
INDOOR WB
F1
°
55
60
65
70
75
80
85
90
95
100
105
110
115
50
9
7
52
54
56
58
60
62
64
66
68
70
72
74
76
12
14
17
20
23
26
29
32
35
10
12
15
18
21
24
27
31
33
35
6
10
14
16
19
22
24
30
30
33
35
7
10
13
16
19
21
24
27
30
33
6
9
5
8
12
16
18
23
24
28
30
34
6
8
12
15
18
21
25
28
31
35
5
9
11
15
19
22
26
30
33
6
9
11
16
20
24
27
31
6
14
18
20
25
29
12
15
20
23
27
9
6
13
17
22
26
11
15
20
25
8
14
18
23
1.
Evaporator Entering Air °F
Table 2: TEMPERATURE AND PRESSURE
SUCTION
PRESSURE
PSIG
(SERVICE
PORT)
SUCTION SERVICE VALVE SUPERHEAT °F
01
2
4
6
8
10
12
14
16
18
20
22
24
26 28 30
32
34
61.5
64.2
67.1
70.0
73.0
76.0
79.2
82.4
35
37
39
41
43
45
47
49
37 39
39 41
41 43
43 45
45 47
47 49
49 51
51 53
41
43
45
47
49
51
53
55
43
45
47
49
51
53
55
57
45
47
49
51
53
55
57
59
47
49
51
53
55
57
59
61
49
51
53
55
57
59
61
63
51
53
55
57
59
61
63
65
53
55
57
59
61
63
65
67
55
57
59
61
63
65
67
69
57
59
61
63
63
67
69
71
59
61
63
65
67
69
71
73
61 63 65
63 65 67
65 67 69
67 69 71
69 71 73
71 73 75
73 75 77
75 77 79
67
69
71
73
75
77
79
81
69
71
73
75
77
79
81
83
1.
Saturation Temperature
Table 3: R-22 SATURATION PROPERTIES
PRESSURE
PSIG
PRESSURE
PSIG
PRESSURE
PSIG
PRESSURE
PRESSURE
PSIG
TEMP. F
TEMP. F
TEMP. F
TEMP. F
TEMP. F
°
°
°
°
°
PSIG
45
46
47
48
49
76.02
77.58
79.17
80.77
82.39
60
61
62
63
64
101.62
103.49
105.39
107.32
109.26
75
76
77
78
79
132.22
134.45
136.71
138.99
141.30
90
91
92
93
94
168.40
171.02
173.67
176.35
179.06
105
106
107
108
109
210.75
213.81
216.90
220.02
223.17
50
51
52
53
54
84.03
85.69
87.38
89.08
90.81
65
66
67
68
69
111.23
113.22
115.24
117.28
119.34
80
81
82
83
84
143.63
145.99
148.37
150.78
153.22
95
96
97
98
99
181.80
184.56
187.36
190.18
193.03
110
111
112
113
114
226.35
229.56
232.80
236.08
239.38
55
56
57
58
59
92.56
94.32
96.11
97.93
99.76
70
71
72
73
74
121.43
123.54
125.67
127.83
130.01
85
86
87
88
89
155.68
158.17
160.69
163.23
165.80
100
101
102
103
104
195.91
198.82
201.76
204.72
207.72
115
116
117
118
119
242.72
246.10
249.50
252.94
256.41
12
Unitary Products Group
®
550.38-N1Y
SYSTEM CONTROLLER - HDB076 ONLY
INDICATIONS OF PROPER OPERATION
Controls operation as follows:
Cooling operation is the same as any conventional air condi-
tioning unit.
1. RANDOM START - Upon initial application of power and
a 2.5 second time delay, the compressor contactor will
be energized.
The following checks may be made to determine if the sys-
tem is operating properly:
2. ANTI-SHORT CYCLE - Once the unit is energized, a
momentary interruption of power, i.e., thermostat cycling,
greater than 8 milliseconds, will initiate the compressor
lockout time delay of five minutes regardless of the con-
dition of the inputs. Upon completion of the 5 minute
lockout delay the system will automatically reset allowing
the compressor contactor to energize.
1. The outdoor fan should be running, with warm air being
discharged from the top of the unit.
2. The indoor blower (furnace or air handler) will be operat-
ing, discharging cool air from the ducts.
3. The vapor line at the outdoor unit will feel cool to the
touch.
3. SAFETY SWITCH - Upon interruption of power to the
compressor via the high pressure or low pressure switch,
the compressor contactor will be locked out indefinitely.
Reset will occur when the pressure switch recloses and
power has been removed and reapplied via the system
circuit breaker or by cycling the thermostat temperature
setting from maximum cool to maximum heat and back
to desired cool setting. During lockout the fault indicating
lamp shall be on.
4. The liquid line at the outdoor unit will feel warm to the
touch.
If unit is not operating properly, check the following items
before calling a serviceman:
1. Indoor section for dirty filter.
2. Outdoor section for leaf or debris blockage.
4. LOW PRESSURE SWITCH BY-PASS TIME DELAY -
The low pressure switch is by-passed for a period of 75 -
105 seconds to allow the system to start and stablize.
After the delay period has expired the system will then
be maintained by the low pressure switch. In the event
that the low pressure switch should open after the delay
period while the compressor is running the system will
go into lockout. Note depending upon how the system is
wired the lockout may automatically be reset or may
require a manual reset.
Eliminate problem, turn off the thermostat for 10 seconds and
attempt start. Wait 5 minutes. If system does not start, call
service technician.
MAINTENANCE
1. Dirt should not be allowed to accumulate on the outdoor
coils or other parts in the air circuit. Clean as often as
necessary to keep the unit clean. Use a brush, vacuum
cleaner attachment, or other suitable means.
2. The outdoor fan motor is permanently lubricated and
does not require periodic oiling.
System Time Delays are as follows: Random Start = 2.5 sec-
onds; Lockout = 5 minutes; Low Pressure By-pass = 75 - 105
seconds.
3. If the coil needs to be cleaned, it should be washed with
Calgon CalClean (mix one part CalClean to seven parts
water). Allow solution to remain on coil for 30 minutes
before rinsing with clean water. Solution should not be
permitted to come in contact with painted panel surfaces.
INSTRUCTING THE OWNER
Assist owner with processing warranty cards. Review Owners
Guide and provide a copy for the owner guidance on proper
operation and maintenance. Instruct the owner or the opera-
tor how to start, stop and adjust temperature setting.
4. Refer to the furnace or air handler instructions for filter
and blower motor maintenance.
When applicable, instruct the owner that the compressor is
equipped with a crankcase heater to prevent the migration of
refrigerant to the compressor during the “OFF” cycle. The
heater is energized only when the unit is not running. If the
main switch is disconnected for long periods of shut down, do
not attempt to start the unit until 8 hours after the switch has
been connected. This will allow sufficient time for all liquid
refrigerant to be driven out of the compressor.
5. The evaporator coil drain pan should be inspected and
cleaned regularly to prevent odors and assure proper
drainage.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE
THE OWNER'S APPROVAL.
The installer should also instruct the owner on proper opera-
tion and maintenance of all other system components.
Unitary Products Group
13
®
550.38-N1Y
NOTES:
14
Unitary Products Group
®
550.38-N1Y
NOTES:
Unitary Products Group
15
®
550.38-N1Y
NOTES:
®
Heating and Air Conditioning
Unitary Products Group
5005 York Drive, Norman, Oklahoma 73069
Subject to change without notice. Printed in U.S.A.
Copyright © by Unitary Products Group 1999. All rights reserved.
Supersedes: 550.38-N1Y (899)
550.38-N1Y (999)
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