Bryant Heat Pump 280ANV User Manual

R
280ANV EVOLUTION EXTREME  
VARIABLE SPEED HEAT PUMP  
WITH PURONr REFRIGERANT  
(2 -- 5 Ton)  
Installation Instructions  
NOTE: Read the entire instruction manual before starting the installation.  
TABLE OF CONTENTS  
PAGE NO.  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INSTALLATION RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3--11  
Step 1 — Check Equipment and Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 2 — Install on Solid Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 3 — Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 4 — Operating Ambient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 5 — Elevate Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 6 — Liquid Line Solenoid Valve (LSV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Step 7 — Making Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5--6  
Step 8 — Make Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Step 9 — Compressor Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Step 10 — Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Step 11 — Start--Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Step 12 — System Functions and Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8--10  
Step 13 — Check Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10--11  
Step 14 — Pumpdown & Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12--17  
FINAL CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
PURONr REFRIGERANT QUICK REFERENCE GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
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Adjust refrigerant charge by adding or removing the charge  
to/from the unit depending on lineset length and indoor unit as  
calculated and displayed on the UI. The user interface (UI)  
calculates required charge adjustment and total system charge  
required. For proper unit operation, check refrigerant charge using  
charging information in the Check Charge section of this  
instruction.  
Installation Recommendations  
In some cases noise in the living area has been traced to gas  
pulsations from improper installation of equipment.  
1. Locate unit away from windows, patios, decks, etc. where  
unit operation sound may disturb customer.  
2. In noise sensitive applications (such as bedrooms), when a  
lineset is mounted to ceiling joists or floor joists, the out-  
door unit must be located at least 10 ft (3.05 m) away. If  
this is not possible, create a line set configuration with  
enough bends to provide 10 ft (3.05 m) of total line set  
length outside the dwelling  
IMPORTANT: Liquid--line size is 3/8--in. OD for all 280ANV  
applications including long line applications.  
IMPORTANT: Always install the factory--supplied liquid--line  
filter drier. Obtain replacement filter driers from your distributor or  
branch.  
3. Ensure that vapor and liquid tube diameters are appropriate  
for unit capacity.  
IMPORTANT: Always install the factory--supplied muffler (part  
#LM10KK003) on the vapor line as described in the Factory  
Supplied Muffler Installation section of these instructions.  
Obtain replacement mufflers from you distributor or branch.  
4. Run refrigerant tubes as directly as possible by avoiding un-  
necessary turns and bends.  
5. Leave some slack between structure and unit to absorb vi-  
bration.  
INSTALLATION  
6. When passing refrigerant tubes through the wall, seal open-  
Specifications for this unit in residential new construction market  
require the outdoor unit, indoor unit (including metering device),  
refrigerant tubing sets, and filter drier, and muffler listed in pre--sale  
literature. There can be no deviation. Consult the Service Manual –  
Air Conditioners and Heat Pumps Using Puron® Refrigerant to  
obtain required unit changes for specific applications and for R--22  
retrofit.  
ing with RTV or other pliable silicon--based caulk (see Fig.  
1).  
7. Avoid direct tubing contact with water pipes, duct work,  
floor joists, wall studs, floors, and walls.  
8. Do not suspend refrigerant tubing from joists and studs with  
a rigid wire or strap which comes in direct contact with  
tubing (see Fig. 1).  
Step 1 — Check Equipment and Job Site  
Unpack Unit  
9. Ensure that tubing insulation is pliable and completely sur-  
rounds vapor tube.  
Move to final location. Remove carton taking care not to damage  
unit.  
10. When necessary, use hanger straps which are 1 in. wide and  
conform to shape of tubing insulation. (See Fig. 1.)  
This unit employs one louver spacer on each of the four sides to  
prevent louver movement during operation. The louver spacers are  
trapped between the coil surface and louver at the approximate  
center of each side (See Fig. 2). This louver spacer should be  
present and, if dislodged during shipment, must be reinstalled  
before unit is placed into operation.  
11. Isolate hanger straps from insulation by using metal sleeves  
bent to conform to shape of insulation.  
!
CAUTION  
EQUIPMENT DAMAGE HAZARD  
Louver Spacer  
Failure to follow this caution may result in equipment damage.  
If proper lineset routing techniques are not followed, variable  
speed systems can be susceptible to lineset transmitted noise  
inside the dwelling and, in extreme cases, tubing breakage.  
OUTDOOR WALL  
CAULK  
INDOOR WALL  
LIQUID TUBE  
SUCTION TUBE  
INSULATION  
THROUGH THE WALL  
JOIST  
HANGER STRAP  
(AROUND SUCTION  
TUBE ONLY)  
A11380  
INSULATION  
Fig. 2 -- Louver Spacer Location  
SUCTION TUBE  
Inspect Equipment  
File claim with shipping company prior to installation if shipment  
is damaged or incomplete. Locate unit rating plate on unit corner  
panel. It contains information needed to properly install unit.  
Check rating plate to be sure unit matches job specifications.  
1” (25.4 mm)  
MIN  
LIQUID TUBE  
SUSPENSION  
A07588  
Fig. 1 -- Connecting Tubing Installation  
The outdoor unit contains the correct amount of refrigerant charge  
for operation with AHRI rated and factory--approved smallest  
indoor unit when connected by 15 ft (4.57 m) of field--supplied or  
factory accessory tubing.  
3
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Step 2 — Install on a Solid, Level Mounting Pad  
!
CAUTION  
If conditions or local codes require the unit be attached to pad, tie  
down bolts should be used and fastened through knockouts  
provided in unit base pan. Refer to unit mounting pattern in Fig. 3  
to determine base pan size and knockout hole location.  
UNIT OPERATION HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
For hurricane tie downs, contact distributor for details and PE  
(Professional Engineer) Certification, if required.  
Do not allow water and/or ice to build up in base pan.  
On rooftop applications, mount on level platform or frame. Place  
unit above a load--bearing wall and isolate unit and tubing set from  
structure. Arrange supporting members to adequately support unit  
and minimize transmission of vibration to building. Consult local  
codes governing rooftop applications.  
!
CAUTION  
UNIT OPERATION HAZARD  
Roof mounted units exposed to winds above 5 mph may require  
wind baffles. Consult the Service Manual -- Residential Split  
System Air Conditioners and Heat Pumps Using Puron®  
Refrigerant for wind baffle construction.  
Failure to follow this caution may result in equipment  
damage or improper operation.  
Locate the unit in such a way that it is stable in all  
circumstances including adverse weather conditions.  
NOTE: Unit must be level to within ±2° (±3/8 in./ft,±9.5 mm/m.)  
per compressor manufacturer specifications.  
Step 6 — In Long--Line Applications, Install  
Liquid--Line Solenoid Valve (LSV)  
Step 3 — Clearance Requirements  
When installing, allow sufficient space for airflow clearance,  
wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm)  
clearance to service end of unit and 48 in. (1219.2 mm) (above  
unit. For proper airflow, a 6--in. (152.4 mm) clearance on 1 side of  
unit and 12--in. (304.8 mm) on all remaining sides must be  
maintained. Maintain a distance of 24 in. (609.6 mm) between  
units. Position so water, snow, or ice from roof or eaves cannot fall  
directly on unit.  
For refrigerant piping arrangements with equivalent lengths of  
greater than 80 ft. (24.38 m) and/or when elevation difference  
between indoor and outdoor unit is greater than ±20 ft. (±6.10 m),  
follow the piping configuration and liquid line solenoid valve  
(LSV) accessory requirements from the Residential Piping and  
Long--line guideline. CCH, start gear and piston changes do not  
apply. If required by Long--Line Guideline, install LSV kit, part  
no. KHALS0401LLS, specifically designed for Puron® refrigerant  
heat pumps. LSV should be installed within 2 ft. (0.61 m) of  
outdoor unit with flow arrow pointing toward outdoor unit.  
On rooftop applications, locate unit at least 6 in. (152.4 mm) above  
roof surface.  
3/8---in. (9.53 mm) Dia.  
Tiedown Knockouts in  
Basepan(2) Places  
Make the necessary electrical connections as shown on Fig. 21 and  
by following the Installation Instructions included with accessory  
kit.  
IMPORTANT: Flow arrow must point toward outdoor unit.  
Variable  
Speed  
HP  
Furnace or  
Fan Coil  
User Interface  
Green  
Yellow  
ABCD  
Connection (optional)  
View From Top  
A05177  
White  
Red  
No  
Use  
TIEDOWN KNOCKOUT LOCATIONS in. (mm)  
UNIT BASE PAN  
Dimension in. (mm)  
LLS  
Optional Remote  
Room Sensor  
A
B
C
35 X 35  
(889 X 889)  
9–1/8 (231.8)  
6–9/16 (166.7) 28–7/16 (722.3)  
Fig. 3 -- Tiedown Knockout Locations  
A12053  
Step 4 — Operating Ambient  
Fig. 4 -- Liquid Line Solenoid Electrical Connection  
(Required for long line applications)  
The minimum outdoor operating ambient in cooling mode is 55_F  
(12.78_C) without low ambient cooling enabled, and the  
maximum outdoor operating ambient in cooling mode is 125_F  
(51.67_C). The maximum heating operation ambient is 66_F  
(18.9_C). Compressor protections prevent operation below --10 to  
-- 2 0 _F.  
Step 5 — Elevate Unit  
Elevate unit per local climate and code requirements to provide  
clearance above estimated snowfall level and ensure adequate  
drainage of unit.  
4
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Step 7 — Make Piping Connections  
!
CAUTION  
!
WARNING  
UNIT DAMAGE HAZARD  
PERSONAL INJURY AND UNIT DAMAGE  
HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
Failure to follow this warning could result in personal injury or  
death.  
If ANY refrigerant tubing is buried, provide a 6 in. (152.4  
mm) vertical rise at service valve. Refrigerant tubing lengths  
up to 36 in. (914.4 mm) may be buried without further  
special consideration. Do not bury lines longer than 36 in.  
(914.4 mm).  
Relieve pressure and recover all refrigerant before system  
repair or final unit disposal. Use all service ports and open all  
flow--control devices, including solenoid valves.  
Outdoor units may be connected to indoor section using accessory  
tubing package or field--supplied refrigerant grade tubing of correct  
size and condition. For tubing requirements beyond 80 ft. (24.38  
m), substantial capacity and performance losses can occur. Follow  
the pipe sizing recommendations in the 280ANV Product data to  
manage these losses.  
!
CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
Refer to Table 1 for field tubing diameters. Refer to Table 2 for  
accessory requirements.  
Do not leave system open to atmosphere any longer than  
minimum required for installation. POE oil in compressor is  
extremely susceptible to moisture absorption. Always keep  
ends of tubing sealed during installation.  
Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)  
LIQUID  
VAPOR*  
UNIT SIZE  
Connection  
Diameter  
Tube  
Diameter  
Connection  
Diameter  
Max (Rated)  
Diameter  
Minimum Tube  
Diameter  
280ANV024  
280ANV036  
280ANV048  
280ANV060  
3/8  
3/8  
3/8  
3/8  
3/8  
3/8  
3/8  
3/8  
7/8  
7/8  
7/8  
7/8  
7/8  
7/8  
5/8  
5/8  
3/4  
3/4  
1 --- 1 / 8  
1 --- 1 / 8  
*
Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length line sets.  
Notes:  
1. Do not apply capillary tube indoor coils to these units.  
2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal and / or greater than 20 ft. (6.1 m) vertical differential, an accessory Liquid Line  
Solenoid must be installed.  
Table 2 – Accessory Usage  
REQUIRED FOR  
L O W --- A M B I E N T C O O L I N G  
APPLICATIONS  
Installations with Radio  
Frequency Interference  
Concerns in the Range  
of 2 to 30 MHZ  
REQUIRED FOR LONG LINE  
APPLICATIONS*  
REQUIRED FOR SEA  
COAST APPLICATIONS  
(Within 2 miles/3.22 km)  
ACCESSORY  
(Over 80 ft/24.38 m)  
(Below 55°F/12.8_C)  
Crankcase Heater  
Evaporator Freeze Protection  
Liquid---Line Solenoid Valve  
Low---Ambient Control  
Puron Refrigerant Balance Port  
H a r d --- S h u t O f f T X V  
Standard  
Standard with Evolution Control  
No  
Standard  
No  
No  
Standard  
No  
No  
Standard  
No  
Yes  
No  
Standard with Evolution Control  
No  
No  
Yes{  
Yes{  
Yes{  
Yes{  
Support Feet  
Recommended  
Standard with Evolution  
Control  
No  
Recommended  
Standard with Evolution  
Control  
No  
Standard with Evolution  
Control  
Standard with Evolution  
Winter Start Control  
EMI Kit  
Control  
No  
No  
No  
Yes  
*
For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (total equivalent length), an accessory  
Liquid Line Solenoid must be installed.  
Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.  
Standard = Standard for all new Puron refrigerant fan coils and furnace coils.  
{
5
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Outdoor Unit Connected to Factory-Approved Indoor  
Unit  
Outdoor unit contains correct system refrigerant charge for  
operation with factory--approved, AHRI--rated smallest indoor unit  
when connected by 15 ft. (4.57 m) of field--supplied or  
factory--accessory tubing, and factory--supplied filter drier. Check  
refrigerant charge for maximum efficiency.  
NOTE: If the indoor furnace coil width is more than the furnace  
casing width, refer to the indoor coil Installation Instructions for  
transition requirements.  
Install Liquid-Line Filter Drier Indoor  
Refer to Fig. 6 and install filter drier as follows:  
1. Braze 5--in. (127 mm) liquid tube to the indoor coil.  
2. Wrap filter drier with damp cloth.  
A05227  
Fig. 6 -- Liquid--Line Filter Drier  
3. Braze filter drier to above 5--in. (127 mm) liquid tube.  
4. Connect and braze liquid refrigerant tube to the filter drier.  
Refrigerant Tubing connection Outdoor  
Connect vapor tube to fitting on outdoor unit vapor service valves  
(see Table 1).  
!
CAUTION  
UNIT DAMAGE HAZARD  
NO Installation of Adapter Tube  
Failure to follow this caution may result in unit damage or  
improper operation.  
Although it is a heat pump this unit has a standard AC liquid  
service valve. An EXV inside the unit serves as the heating  
expansion device.  
Installation of filter drier in liquid line is required.  
Sweat Connections  
Factory Supplied Muffler (part # LM10KK003)  
Installation is Required On Every Installation:  
S A muffler is required to reduce noise transmitted to indoor through  
the line set.  
S Muffler must be installed outside the dwelling. Muffler can also be  
installed in vertical configuration for space consideration  
maintaining a minimum of 12 in (304.8 mm) straight pipe section  
to the closest bend.  
S Maintain at least 12 in. (304.8 mm) straight pipe length to the  
muffler shell inlet and from the outlet stubs.  
!
CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
S Use a brazing shield  
S Wrap service valves with wet cloth or heat sink material.  
S To prevent rusting, provide sufficient clearance between the  
muffler andthe groundsurface. Also, position themuffler such that  
accidental abuse (such as by a weed trimmer, lawn mower etc.) of  
the painted surface is avoided. Apply touch--up paint to muffler  
braze joints.  
Use refrigerant grade tubing. Service valves are closed from factory  
and ready for brazing. After wrapping service valve with a wet  
cloth, braze sweat connections using industry accepted methods  
and materials. Consult local code requirements. Refrigerant tubing  
and indoor coil are now ready for leak testing. This check should  
include all field and factory joints.  
S Insulating the muffler with Armaflext tape is recommended.  
Evacuate Refrigerant Tubing and Indoor Coil  
!
CAUTION  
EXTERIOR  
WALL  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
Never use the system compressor as a vacuum pump.  
MUFFLER  
Refrigerant tubes and indoor coil should be evacuated using the  
recommended deep vacuum method of 500 microns. The alternate  
triple evacuation method may be used. See Service Manual for  
triple evacuation method. Always break a vacuum with dry  
nitrogen prior to opening the refrigerant system for servicing.  
TO DWELLING  
VAPOR LINE  
A12044  
Fig. 5 -- Muffler Installation  
Deep Vacuum Method  
The deep vacuum method requires a vacuum pump capable of  
pulling a vacuum of 500 microns and a vacuum gauge capable of  
accurately measuring this vacuum depth. The deep vacuum method  
is the most positive way of assuring a system is free of air and  
liquid water. (See Fig. 7)  
6
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Connect Ground and Power Wires  
Connect ground wire to ground connection in control box for  
safety. Connect power wiring to contactor as shown in Fig. 8.  
5000  
4500  
4000  
3500  
3000  
2500  
2000  
1500  
1000  
500  
LEAK IN  
SYSTEM  
DISCONNECT  
PER N. E. C. AND/OR  
LOCAL CODES  
CONTACTOR  
FIELD POWER  
WIRING  
VACUUM TIGHT  
TOO WET  
TIGHT  
DRY SYSTEM  
FIELD GROUND  
A95424  
0
1
2
3
4
5
6
7
WIRING  
GROUND  
LUG  
MINUTES  
A95424  
A91056  
Fig. 7 -- Deep Vacuum Graph  
Fig. 8 -- Line Power Connections  
Final Tubing Check  
Connect Control Wiring  
IMPORTANT: Check to be certain factory tubing on both indoor  
and outdoor unit has not shifted during shipment. Ensure tubes are  
not rubbing against each other or any sheet metal. Pay close  
attention to feeder tubes, making sure wire ties on feeder tubes are  
secure and tight.  
Connect to Evolution connections. Only two wires (AB) to  
Evolution capable indoor unit (furnace or fan coil) is required.  
Typical 4 wire (ABCD) may be connected (see Fig. 18).  
IMPORTANT: This system requires the power supply to the  
outdoor unit, and the indoor unit, for the UI to communicate with  
the outdoor unit.  
Step 8 — Make Electrical Connections  
General Information  
Use No. 18 AWG or larger color--coded, insulated (35°C  
minimum) wire for low voltage control wires.  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
All wiring must be NEC Class 1 and must be separated from  
incoming power leads.  
Failure to follow this warning could result in personal  
injury or death.  
Use furnace transformer, fan coil transformer, or accessory  
transformer for control power requirement of system accessories  
external to the OD unit. The outdoor unit has its own transformer  
power.  
Do not supply power to unit with compressor terminal box  
cover removed.  
Final Wiring Check  
Be sure field wiring complies with local and national fire, safety,  
and electrical codes, and voltage to system is within limits shown  
on unit rating plate. Contact local power company for correction of  
improper voltage. See unit rating plate for recommended circuit  
protection device.  
IMPORTANT: Check factory wiring and field wire connections to  
ensure terminations are secured properly. Check wire routing to  
ensure wires are not in contact with tubing, sheet metal, etc.  
Step 9 — Compressor Crankcase Heater  
This compressor has an internal crankcase heater. Furnish power  
to the unit a minimum of 24 hr before starting the unit for the first  
time.  
To furnish power to heater only, set thermostat to OFF and close  
electrical disconnect to outdoor unit.  
Power is not required to the indoor unit or User Interface for proper  
operation of heater. Crankcase heater will however be intelligently  
energized as needed between operations, and otherwise even when  
the UI and indoor unit is not installed, as long as there is power to  
the outdoor unit even if the indoor unit and UI are not yet installed.  
NOTE: Operation of unit on improper line voltage constitutes  
abuse and could affect unit reliability. See unit rating plate. Do not  
install unit in system where voltage may fluctuate above or below  
permissible limits.  
NOTE: Use copper wire only between disconnect switch and unit.  
NOTE: Install branch circuit disconnect of adequate size per NEC  
to handle unit starting current. Locate disconnect within sight from  
and readily accessible from unit, per Section 440--14 of NEC.  
Route Ground and Power Wires  
Remove access panel to gain access to unit wiring. Extend wires  
from disconnect through power wiring hole provided and into unit  
control box.  
Airflow Setup for Evolution Control Furnace or  
FE Fan Coil (communicating)  
This system can only be installed with Evolution indoor and user  
interface (UI) SYSTXBBUID01--D or SYSTXBBUIZ01--D  
(software version 23 or newer). When using an Evolution User  
Interface, airflow is automatically selected based on equipment  
size. The user has the option of selecting Comfort, Efficiency and  
Max airflow for Heating and/or Cooling modes. These should be  
selected based on balance between the homeowner’s comfort and  
energy consumption expectations. See User Interface Installation  
Instructions for additional available adjustments.  
!
WARNING  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could result in personal injury  
or death.  
The unit cabinet must have an uninterrupted or unbroken  
ground to minimize personal injury if an electrical fault  
should occur. The ground may consist of electrical wire or  
metal conduit when installed in accordance with existing  
electrical codes.  
Due to using a communicating control with the fan coil or the  
furnace, dip switch adjustments are not necessary. The outdoor  
unit configuration and the indoor airflows are determined by  
communicating control setup.  
7
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Step 10 — Install Accessories  
There are no refrigeration circuit or electrical accessories required  
or available for installation within the unit. External to the unit, the  
same accessories such as the liquid line solenoid, support feet,  
snow rack, wind baffle etc., are available on other Bryant units can  
also be used on this line of product. Refer to the individual  
Installation Instructions packaged with kits or accessories when  
installing.  
Step 11 — Start--Up  
!
A11104  
CAUTION  
Fig. 9 -- Required Charge Adjustment Calculated in UI  
UNIT OPERATION AND SAFETY HAZARD  
4. Set User Interface to operate cooling in CHARGING mode.  
Charging mode operates system compressor speed and fan  
speeds to proper conditions to check the refrigerant charge.  
Failure to follow this caution may result in minor personal  
injury, equipment damage or improper operation.  
Observe the following:  
NOTE: Do not check charge in a mode other than CHARGING.  
1. Do not overcharge system with refrigerant.  
2. Do not operate unit in a vacuum or at negative pressure.  
3. Do not disable low pressure switch  
4. Dome temperatures may be hot.  
5. Wait for the specified stabilization time, depending on  
lineset length. Compare subcooling at liquid line service  
valve to Liquid Line Subcooling Target as shown CHAR-  
GING screen (LiqLin SC TGT) (see Fig. 10).  
!
CAUTION  
PERSONAL INJURY HAZARD  
Failure to follow this caution may result in personal injury.  
Wear safety glasses, protective clothing, and gloves when  
handling refrigerant.  
!
CAUTION  
ENVIRONMENTAL HAZARD  
A12054  
Failure to follow this caution may result in environmental  
damage.  
Fig. 10 -- Liquid Line Subcooling Target  
Federal regulations require that you do not vent  
refrigerant to the atmosphere. Recover during system  
repair or final unit disposal.  
Step 12 — System Functions And Sequence Of  
Operation  
The 280ANV models utilize an Evolution Communicating User  
Interface (UI). With a call for cooling, the outdoor fan and  
compressor are energized to run at lowest cooling demand. If this  
does not satisfy cooling demand, the system will ramp up in stages  
until it satisfies the demand. After coping with the higher demand,  
the unit returns to lower capacity operation until the demand is  
satisfied or until an increase in demand.  
Follow these steps to properly start up the system:  
1. After system is evacuated, close the disconnects to energize  
the ID and OD units to assess the user interface (UI), Keep  
system in off mode. Under the Advanced function menu,  
assess the REQUIRED CHARGE CALCULATION screen.  
Enter the lineset length and vapor tube diameter. The user  
interface (UI) will now display the required charge adjust-  
ment (see Fig. 9) for the lineset and an adjustment for a  
large indoor coil if recognized as such by the UI.  
When all demand is satisfied, the compressor will shut off. As the  
unit operates at lower capacity, system vapor (suction) pressure will  
be higher than it is during a standard single--stage system operation  
or during a higher capacity operation.  
2. Add or remove the required charge adjustment for lineset  
length to liquid service valve.  
When the outdoor ambient is more the 100_F (37.8_C), the  
outdoor fan will continue to run for one minute after compressor  
shuts off. This reduces pressure differential for easier starting in  
the next cycle.  
The conventional thermostat inputs is designed to work for  
emergency operation only. Connections are Y, O and C. The  
system will only operate at maximum capacity, heating or cooling.  
Note: If lineset is less than 15 feet (--9.4_C), charge re-  
moval may be necessary.  
3. Fully open liquid and vapor service valves.  
The user interface (UI) displays the operation mode and fault codes  
as specified in the troubleshooting section. See Table 7 for codes  
and definitions.  
NOTE: Only one code will be displayed on the outdoor unit  
control board (the most recent, with the highest priority). The  
latest codes are stored and can be access via the UI.  
8
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Crankcase Heater Operation  
Utility Interface With Evolution Control  
This unit has an internal crankcase heater that will be energized  
during the off cycle and is intelligently demanded by the system to  
prevent the compressor from being the coldest part of the system  
thus enhancing the reliability. The crankcase heater will function  
as needed any time the outdoor unit is powered. The indoor unit  
and UI do not need to be installed for the crankcase heater to  
operate properly.  
The utility curtailment relay should be wired between the two  
UTIL connections on the control board for this Evolution  
Communicating System (see Fig. 20). This input allows a power  
utility device to interrupt compressor operation during peak load  
periods. When the utility sends a signal to shut the system down,  
the User Interface will display, ”Curtailment Active”. See UI  
installation instructions for setup details.  
NOTE: Contactor may close intermittently without the unit  
starting. This is done to determine whether the control needs to  
energize the crankcase heater. Closing the contactor powers the  
inverter and allows the system to check compressor temperature.  
Communication and Status Function Lights  
Evolution Control, Green Communications (COMM)Light  
A green LED (COMM light) on the outdoor board (see Fig. 11)  
indicates successful communication with the other system  
products. The green LED will remain OFF until communication is  
established. Once a valid command is received, the green LED will  
turn ON continuously. If no communication is received within 2  
minutes, the LED will be turned OFF until the next valid  
communication.  
Amber Status Light  
Amber colored STATUS light indicates operation and error status.  
See Table 7 for definitions.  
Outdoor Fan Motor Operation  
The outdoor unit control (Fig. 11) energizes outdoor fan anytime  
compressor is operating, except for defrost and as needed during  
low--ambient cooling operation. The outdoor fan remains  
energized if a pressure switch opens or compressor scroll over  
temperature should occur. This OD fan is an ECM motor which  
operates at varying speeds depending on the ambient and the  
demand.  
Time Delays  
The unit time delays include:  
S Five minute time delay to start cooling or heating operation when  
there is a call from the user interface. To bypass this feature,  
momentarily short and release Forced Defrost pins.  
S Five minute compressor re--cycle delay on return from a  
brown--out condition.  
S Two minute time delay to return to standby operation from last  
valid communication.  
S One minute time delay of outdoor fan at termination of cooling  
mode when outdoor ambient is greater than or equal to 100_F  
(37.8_C).  
S Fifteen second delay at termination of defrost before the auxiliary  
heat is de--energized.  
S See Table 7 for other delay information.  
1
BRN  
SEC2  
RED  
YEL  
BLU  
General Information  
EXV  
SEC1  
Evolution Controlled low ambient cooling:  
PWM2  
PWM1  
PL4  
CC  
This unit is capable of low ambient cooling down to 0°F (--17.8°C)  
with Low Ambient enabled on the Evolution Control. A low  
ambient kit is not required. The only accessory that may be  
required is wind baffles in locations which are likely to experience  
cross winds in excess of 5 miles an hour. This generally occurs  
only on roof and open area applications. The Evolution Control  
provides an automatic evaporator freeze thermostat. Low ambient  
cooling must be enabled in the User Interface setup. Fan may not  
begin to cycle until about 40°F (4.4°C) OAT. Fan will cycle based  
on coil and outdoor air temperature.  
PL3  
PL2  
SPT  
HPS  
PL11  
PL6  
CB  
OST  
RVS  
PL1  
OCT  
OAT  
Evolution controlled low ambient mode operates as follows:  
STATUS  
COMM  
S Fan is OFF when outdoor coil temperature is too low (+  
55_F/12.7_C), the saturated suction pressure indicates a freezing  
indoor coil or outdoor fan has been ON for 30 minutes. (Fan is  
turned off to allow refrigerant system to stabilize.)  
J2  
C
LS  
O
UTIL  
Y
PL8  
FORCED  
A B C NO  
USE  
MODEL  
DEFROST  
A12048  
S Fan is ON when outdoor coil temperature is too high  
(+80_F/26.7_C), the high side pressure is too high or if outdoor  
fan has been OFF for 30 minutes. (Fan is turned on to allow  
refrigerant system to stabilize)  
S Low pressure indication by the suction pressure transducer is  
ignored for first 3 minutes during low ambient start up. After 3  
minutes, if low pressure trip occurs, then outdoor fan motor is  
turned off for 10 minutes, with the compressor running. If  
pressure condition is satisfied within 10 minutes then cooling  
continues with the outdoor fan cycling per the coil temperature  
routine listed above for the remainder of the cooling cycle. If the  
suction pressure condition is not satisfied within 10 minutes, then  
the normal trip response (shut down cooling operation and  
generate LP trip error) will occur.  
Fig. 11 -- Variable Speed Control Board  
Defrost  
This user interface (UI) offers 5 possible defrost interval times: 30,  
60, 90, 120 minutes, or AUTO. The default is AUTO.  
Defrost interval times: 30, 60, 90, and 120 minutes or AUTO are  
selected by the Evolution Control User Interface (dip switches are  
not used.)  
AUTO defrost adjusts the defrost interval time based on the last  
defrost time as follows:  
S When defrost time <3 minutes, the next defrost interval=120  
minutes.  
S When defrost time 3--5 minutes, the next defrost interval=90  
minutes.  
S When defrost time 5--7 minutes, the next defrost interval=60  
minutes.  
S When defrost time >7 minutes, the next defrost interval=30  
minutes.  
9
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The control board accumulates compressor run time. As the  
accumulated run time approaches the selected defrost interval time,  
the control board monitors the coil temperature sensor for a defrost  
demand. If a defrost demand exists, a defrost cycle will be initiated  
at the end of the selected time interval. A defrost demand exists  
when the coil temperature is at or below 32_F (0_C) for 4 minutes  
during the interval. If the coil temperature does not reach 32_F  
(0_C) within the interval, the interval timer will be reset and start  
over.  
S Upon initial power up the first defrost interval is defaulted to 30  
minutes. Remaining intervals are at selected times.  
S Defrost is only allowed to occur below 50_F (10_C) outdoor  
ambient temperature.  
subcooling method. Compare the subcooling taken at the liquid  
service valve to the subcooling target (LiqLin SC TGT) listed on  
the charging screen. Add refrigerant if the subcooling is low and  
remove charge if subcooling is high. Tolerance should be ±2°F.  
If any adjustment is necessary, add or remove the charge slowly  
(no greater than 0.5 lb per minute) and allow system to operate for  
15 minutes to stabilize before declaring a properly charged system.  
The use of a commercial charge metering device (restrictor) such as  
Imperial liquid low side charger model 535--C or Watsco  
ChargeFaster model CH200 is recommended when adding  
refrigerant to an operating system. This prevents potential damage  
of liquid slugging of the compressor and allows the subcooling to  
stabilize quicker.  
The defrost cycle is terminated as described below.  
If the indoor temperature is above 80_F (26.67_C), and the  
outdoor temperature is in the favorable range, adjust system charge  
by weight based on line length and allow the indoor temperature to  
drop to 80_F (26.67_C) before attempting to check system charge  
by subcooling method as described above.  
S When OAT is > 30°F (--1.1°C), defrost terminates if outdoor coil  
temperature > 50°F (+10°C).  
S When OAT 30°F (--1.1°C), defrost will terminate if OCT is  
>40°F (+4.4°C).  
S Or 10 minutes has passed.  
If the indoor temperature is below 70_F (21.11_C), or the outdoor  
temperature is not in the favorable range, adjust charge for line set  
length above or below 15ft (4.57 m) only. Charge level should then  
be appropriate for the system to achieve rated capacity. The charge  
level could then be checked at another time when the both indoor  
and outdoor temperatures are in a more favorable range. This  
ensures maximum efficiency and reliability.  
At the defrost termination, the outdoor fan output (ODF) will turn  
on 15 seconds before the reversing valve switching.  
NOTE: Compressor speed during defrost varies based on outdoor  
conditions.  
Step 13 — Check Charge  
Charge in CHARGING mode  
Heating Check Chart Procedure  
Factory charge amount and desired subcooling are shown in the  
user interface (UI). To properly check or adjust charge, conditions  
must be favorable for subcooling charging in cooling mode.  
Favorable conditions exist when the outdoor temperature is  
between 65_F and 100_F (18_C and 38_C), and the indoor  
temperature is between 70_F and 80_F (21_C and 27_C). If the  
temperatures are outside of these ranges, weigh--in charge only. If  
confirmation is needed return and check subcooling when the  
temperatures are within the desired range.  
In heating mode, the required charging method is by weigh--in. On  
new installation or complete recharge, refer to the REQUIRED  
CHARGE CALCULATION screen in the user interface (UI) to  
obtain the required charge adjustment and/or total charge required.  
Use the UI and Heating Check Charts (Fig. 12 and 13) to check  
system operation during heating mode. The indoor conditions  
must be between 60°F (15.6_C) and 80°F (26.7_C) to check the  
charge. The outdoor coil must be dry and ice/frost free. Do not  
check for pressure agreement if the outdoor has rain, mist or snow  
present.  
Charging Procedure: Unit is factory charged for 15ft (4.57 m) of  
lineset and for smaller rated indoor coil combinations. If any  
refrigerant charge adjustment is required based on the indoor coil  
combination you select and the line set length you input, the UI  
will calculate and display the target subcooling and the amount of  
additional charge to be added. Therefore UI is your source of  
information for charging the system correctly. Refrigerant charge  
adjustment amount for adding or removing 0.6 oz/ft (17.74 g/m) of  
3/8 liquid line above or below 15ft (4.57 m) respectively, and an  
additional amount of refrigerant charge adjustment (2 lbs) for a  
large ID coil if required, is calculated and displayed by the UI.  
Use the Defrost CHECKOUT mode to remove ice or frost from  
coil, if present, prior to checking the heating pressures.  
To use the Heating Check Chart, the user interface (UI) must be in  
CHARGING mode. These charts indicate whether a correct  
relationship exists between system operating pressure and air  
temperature entering indoor and outdoor units. If pressure and  
temperature do not match on chart, system refrigerant charge may  
not be correct. DO NOT USE CHART TO ADJUST  
REFRIGERANT CHARGE.  
Perform a final charge check only when in cooling and OD is  
between 65°F (18°C) and 100°F (38°C).  
NOTE: High pressure is at vapor service valve. Add 12 psig if  
high pressure is taken from liquid service valve.  
NOTE: UI indicates acceptable conditions if outside of this range.  
Do not charge if outside 65°F (18°C) and 100°F (38°C) outdoor  
temperature.  
NOTE: When charging is necessary during heating season, charge  
must be weighed in accordance with unit rating plate, ±0.6 oz./ft  
(±17.74 g/m). of 3/8--in. liquid--line above or below 15 ft (4.57  
m)., respectively.  
If the range is acceptable, go the CHARGING screen in the user  
interface (UI). At cooling conditions, set the user interface (UI) to  
check the charge in cooling mode. Allow system to operate in  
cooling mode for the stabilization period as indicated in the user  
interface (UI). Once conditions are indicated as favorable and  
stable by the user interface (UI), check the system charge by  
NOTE: In heating mode, check refrigerant pressures only when  
user interface is in CHARGING mode and indicates stable. If  
charge is in doubt, remove charge and weigh--in correct calculated  
refrigerant charge.  
10  
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Charging In Cooling Mode - 280ANV024/036  
Charging In Cooling Mode - 280ANV048/060  
See user interface set in Charging Mode  
See user interface set in Charging Mode  
Heating Check Chart - 280ANV024/036  
Heating Check Chart - 280ANV048/060  
For use in Heating Charging Mode only  
For use in Heating Charging Mode only  
400  
350  
300  
250  
200  
150  
100  
50  
2757  
2413  
2068  
1724  
1380  
1034  
690  
3102  
2757  
450  
400  
350  
300  
250  
200  
150  
100  
50  
Vapor Service  
Valve Pressure  
80ºF ID (27ºC)  
70ºF ID (21ºC)  
Vapor Service  
Valve Pressure  
2413  
2068  
1724  
1380  
1034  
690  
80ºF ID (27ºC)  
70ºF ID (21ºC)  
60ºF ID (16ºC)  
60ºF ID (16ºC)  
Suction Pressure  
Suction Pressure  
345  
0
345  
0
0
0
0
10  
20  
30  
40  
50  
60  
0
10  
(-12ºC)  
20  
30  
(-10ºC)  
40  
50  
(10ºC)  
60  
(16ºC)  
(-7ºC)  
(-18ºC)  
(-12ºC)  
(-10ºC)  
(4ºC)  
(10ºC)  
(16ºC)  
(-7ºC)  
(-18ºC)  
(4ºC)  
Outdoor Ambient Temperature ºF (ºC)  
Outdoor Ambient Temperature ºF (ºC)  
A12045  
A12046  
280ANV024/036 Heating Pressure check Chart (Psig)  
280ANV048/060 Heating Pressure check Chart (Psig)  
Indoor Temperature (_F)  
Indoor Temperature (_F)  
OD DB  
(_F)  
OD DB  
(_F)  
60  
70  
80  
60  
70  
80  
High  
290  
263  
245  
232  
222  
212  
203  
Low  
129  
106  
89  
74  
69  
High  
329  
303  
285  
270  
256  
246  
238  
Low  
130  
108  
90  
81  
68  
High  
368  
346  
324  
312  
291  
281  
270  
Low  
High  
324  
293  
277  
257  
242  
232  
218  
Low  
121  
99  
87  
69  
57  
50  
42  
High  
360  
333  
307  
288  
281  
263  
253  
Low  
120  
100  
80  
65  
60  
High  
407  
380  
360  
333  
320  
306  
288  
Low  
60  
50  
40  
30  
20  
10  
0
132  
110  
90  
87  
64  
60  
50  
40  
30  
20  
10  
0
121  
102  
88  
69  
60  
55  
49  
52  
43  
53  
50  
47  
43  
50  
42  
Fig. 12 -- Heating Pressure Check Chart 280ANV024/036  
Fig. 13 -- Heating Pressure Check Chart 280ANV048/060  
NOTE: A small quantity of charge remains in the OD unit that  
must be manually recovered if isolating refrigerant to indoor coil  
and lineset via HEAT mode PUMP DOWN.  
Step 14 — Pumpdown & Evacuation  
If this system requires either a Pump Down or Evacuation for any  
reason, the procedures below must be followed:  
Evacuation and Recovery of Refrigerant from within  
280ANV  
Pump Down  
Because this system has an inverter controlled, compressor, suction  
pressure transducer and EXV, conventional procedure cannot be  
used to “pump down” and isolate the refrigerant into the outdoor  
unit. The UI (User Interface) has provisions to assist in performing  
this function.  
Because this system has an EXV for the heating expansion device,  
additional steps must be taken to open the EXV if the heat pump  
unit must be evacuated for service reasons. If the EXV is not open  
when pulling a vacuum or recovering refrigerant from the heat  
pump unit, extended evacuation time may be required and/or  
inadequate vacuum obtained. The UI (User Interface) has  
provisions to open the EXV for refrigerant recovery and/or  
evacuation.  
1. Connect gages to 280ANV liquid and vapor or suction ca-  
pillary service ports to monitor operating pressures during  
and at completion of the procedure.  
2. In the advanced menu of the UI, go to Checkout > Heat  
Pump> Pumpdown  
1. Connect gages to 280ANV liquid and vapor or suction ca-  
pillary service ports to monitor operating pressures during  
and at completion of the procedure. Attach recovery system  
or vacuum pump to gage set as needed for the service pro-  
cedure. The service valves must be open to evacuate the  
unit through the line set service ports. The suction capillary  
service port is a direct connection to the suction port of the  
compressor.  
3. Select mode to pump down in (COOL or HEAT), COOL  
mode allows refrigerant to be isolated in outdoor unit.  
HEAT mode allows the refrigerant to be isolated in indoor  
coil and lineset. Set desired time period. Default time peri-  
od for the procedure is 120 minutes.  
4. Select Start on UI to begin the pumpdown process. Unit  
will begin running in selected mode after a brief delay.  
2. In the advanced menu of the UI, go to Checkout > Heat  
Pump> > Evacuation.  
5. Close the liquid service valve.  
6. The unit will run in selected mode with the low pressure  
protection set to indicate pumpdown is complete when the  
suction pressure drops below 0 psig. Compressor protec-  
tions are still active to prevent damage to the compressor or  
inverter (high pressure, high current, high torque, scroll  
temperature, etc.) .  
7. Once system indicates pumpdown complete or failure to  
complete shutdown, close vapor service valve.  
8. If pumpdown does not complete due to compressor safety  
shutdown, a recovery system will be required to remove fi-  
nal quantity of refrigerant from indoor coil and line set.  
3. Set desired time period. Default time period for the proced-  
ure is 120 minutes.  
4. Select START on UI to open the valve.  
5. Begin evacuation or refrigerant recovery as required for the  
procedure after UI indicates the EXV is open. Power may  
be removed from heat pump after the UI indicates “READY  
TO EVACUATE.”  
6. Remove power from indoor and heat pump unit prior to ser-  
vicing unit. The EXV will retain the open position.  
NOTE: See service training materials for troubleshooting the  
EXV using EXV CHECK mode.  
9. Remove power from indoor and heat pump unit prior to ser-  
vicing unit.  
11  
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Compressor Brush--less Permanent Magnet Motor (BPM):  
MAJOR COMPONENTS  
Variable speed Control Board  
The HP control board controls the following functions:  
S Compressor speed  
S Contactor operation  
S Outdoor fan motor operation  
S Reversing valve operation  
S Defrost operation  
S The motor inductance reacts to the drive current and a sinusoidal  
current is induced through the motor windings.  
S The sinusoidal current sets a rotating magnetic field, at the  
frequency set by the drive.  
S The magnets enable the motor to synchronize to that frequency,  
set by the drive.  
S Supplies the mechanical power afforded to it by the drive voltage,  
current and frequency.  
S Low ambient cooling  
S Crankcase heater operation  
S Pressure switch monitoring  
S Time Delays  
Electronic Expansion Valve (EXV)  
This unit uses an electronic expansion valve for refrigerant  
metering in the heating mode. The control board drives the EXV to  
its proper position based on the operating mode and conditions.  
The Evolution Control Service mode allows for manual opening  
and closing of the EXV for troubleshooting and pump down.  
S Pressure Transducer  
S .EXV operation control  
S .Inverter communication and control  
Field control Connections  
Inverter  
For normal operation use the ABCD Evolution connections only.  
Only two wires, AB are required. See Fig. 18. Discrete inputs (Y,C,  
O) are available for emergency operation if the Evolution Bus is  
not in operation.  
The inverter is located inside the control box. This is an air--cooled  
device that communicates with the control board and drives the  
compressor to the demanded RPM. When the contactor closes, it  
powers the inverter with line voltage. The inverter converts the line  
voltage to 410 volts DC. The inverter then converts DC voltage  
into 3--phase variable frequency and variable voltage.  
NOTE: Manually closing the contactor will not cause the unit to  
operate. The unit must be operated with an Evolution Control. A  
standard thermostat will allow operation only in the emergency  
mode (high speed heating or cooling).  
Pressure Transducer (SPT)  
A 5 VDC output low pressure transducer that provides a 0--5 VDC  
data for interpretation by the control board for a 0 to 200 psig  
range of pressure at the suction tube. This interpreted pressure data  
is then intelligently used by the control board for low pressure  
cut--out, loss of charge management, compressor overall envelope  
management, oil circulation management, lubrication management  
and EXV control. (See Fig. 17.)  
Motor Control Drive (Inverter):  
S Converts the sinusoidal AC input mains voltage into a variable  
frequency AC output generated used PWM modulation of the  
output.  
S Drive adjusts the output voltage to run the compressor at the  
correct speed at any load point in the envelope.  
S The drive actively controls the motor current to insure the proper  
torque is provided for the given loading condition.  
S The drive control algorithms insure the magnetic field set up in  
the motor is synchronized with the rotor insuring smooth  
efficiency operation.  
S The drive actively controls the input current at heavy loading  
conditions to insure the input power factor to the drive is >0.95.  
Compressor Control Contactor  
The contactor has a 24 volt coil. The electronic control board  
controls the operation of the contactor.  
TROUBLESHOOTING  
Systems Communication Failure  
If communication with the Evolution control is lost with the User  
Interface (UI), the control will flash the appropriate fault code (see  
Table 7). Check the wiring to the User Interface and the indoor and  
outdoor units and power.  
Variable Speed Compressor  
Model Plug  
This unit contains a variable speed compressor that has a wide  
operating range. This compressor can only be operated by the  
specific inverter supplied with the unit.  
Each control board contains a model plug. The correct model plug  
must be installed for the system to operate properly (see Table 3).  
Table 3 – Model Plug Information  
Motor Control Drive + BPM together:  
PIN RESISTANCE  
S
Through the combination of the drive and motor, the  
system is able to operate over a wide speed range.  
MODEL  
NUMBER  
( K --- o h m s )  
MODEL PLUG  
NUMBER  
P i n s 1 --- 4  
Pins 2---3  
S
The drive provides protection of the system to various  
abnormal conditions including limiting the compressor  
envelope of operation to appropriate boundaries.  
280ANV024  
280ANV036  
280ANV048  
280ANV060  
HK70EZ001  
HK70EZ002  
HK70EZ003  
HK70EZ004  
5.1K  
5.1K  
5.1K  
5.1K  
11K  
18K  
24K  
33K  
S
S
Provides many pieces of system data as feedback to the  
system controller.  
Allows operation at least than full performance in case of  
system faults or issues.  
The model plug is used to identify the type and size of unit to the  
control.  
On new units, the model and serial numbers are input into the  
board’s memory at the factory. If a model plug is lost or missing at  
initial installation, the unit will operate according to the  
information input at the factory and the appropriate error code will  
flash temporarily. An RCD replacement board contains no model  
and serial information. If the factory control board fails, the model  
plug must be transferred from the original board to the replacement  
board for the unit to operate.  
!
CAUTION  
EQUIPMENT DAMAGE HAZARD  
Failure to follow this caution may result in equipment damage  
and/or improper operation.  
Do not attempt to apply line voltage directly to the  
compressor. This will destroy the compressor.  
NOTE: The model plug takes priority over factory model  
information input at the factory. If the model plug is removed after  
initial power up, the unit will operate according to the last valid  
model plug installed, and flash the appropriate fault code  
temporarily.  
12  
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Pressure Switch Protection  
THERMISTOR CURVE  
The outdoor unit is equipped with high pressure switch. If the  
control senses the opening of a high pressure switch, it will  
respond as follows:  
90  
80  
70  
60  
50  
40  
30  
20  
1. De--energize the contactor.  
2. Keep the outdoor fan operating for 15 minutes.  
3. Display the appropriate fault code (see Table 7).  
4. After a 15 minute delay, if there is a call for cooling or heat-  
ing and HPS is reset, the contactor is energized.  
10  
0
0
20  
40  
60  
80  
100  
120  
TEMPERATURE (DEG. F)  
5. If HPS has not closed after a 15 minute delay, the outdoor  
fan is turned off. If the open switch closes anytime after the  
15 minute delay, then resume operation with a call for cool-  
ing or heating at a temporary reduced capacity.  
A91431  
Fig. 14 -- Thermistor Resistance Versus Temperature  
6. If HPS trips 3 consecutive cycles, the unit operation is  
locked out for 4 hours.  
If the outdoor air or coil thermistor should fail, the control will  
flash the appropriate fault code (see Table 7.)  
IMPORTANT: The outdoor air thermistor, coil thermistor and  
suction thermistor should be factory mounted in the final  
locations. Check to ensure thermistors are mounted properly  
(See Fig. 15, 16 and 17).  
7. In the event of a high--pressure switch trip or high--pressure  
lockout, check the refrigerant charge, outdoor fan operation,  
and outdoor coil (in cooling) for airflow restrictions, or in-  
door airflow in heating.  
8. In the event of a low--pressure trip or low--pressure lockout,  
check the refrigerant charge and indoor airflow (cooling)  
and outdoor fan operation and outdoor coil in heating.  
Thermistor Sensor Comparison  
The control continuously monitors and compares the outdoor air  
temperature sensor and outdoor coil temperature sensor to ensure  
proper operating conditions. The comparison is:  
S In cooling if the outdoor air sensor indicates 10_F (5.6_C)  
warmer than the coil sensor (or) the outdoor air sensor indicates ≥  
20_F (11_C) cooler than the coil sensor, the sensors are out of  
range.  
Control Fault  
If the outdoor unit control board has failed, the control will flash  
the appropriate fault code (see Table 7). The control board should  
be replaced.  
Brown-Out Protection  
If the line voltage is less than 187v for at least 4 seconds, the  
contactor and fan relay are de--energized. Compressor and fan  
operation are not allowed until voltage is a minimum of 190v. The  
control will flash the appropriate fault code (see Table 7).  
S In heating if the outdoor air sensor indicates 35_F (19.4_C)  
warmer than the coil sensor (or) the outdoor air sensor indicates ≥  
10_F (5.6_C) cooler than the coil sensor, the sensors are out of  
range.  
If the sensors are out of range, the control will flash the appropriate  
fault code as shown in Table 7.  
230V Line (Power Disconnect) Detection  
If there is no 230v at the contactor when the indoor unit is powered  
with a cooling or heating demand, the appropriate fault code is  
displayed. Verify the disconnect is closed and 230v wiring is  
connected to the unit.  
The thermistor comparisons are not performed during low ambient  
cooling or defrost operation.  
Failed Thermistor Default Operation  
Factory defaults have been provided in the event of failure of  
outdoor air thermistor (OAT) and/or outdoor coil thermistor  
(OCT).  
Inverter Voltage Sensing  
The control board senses the presence or absence of 230 V through  
the feedback from inverter. The control monitors the high voltage  
to the inverter. Voltage should be present anytime the contactor is  
energized and voltage should not be present when the contactor is  
de--energized.  
If the OAT sensor should fail, low ambient cooling will not be  
allowed and the one--minute outdoor fan off delay will not occur.  
Defrost will be initiated based on coil temperature and time.  
If the OCT sensor should fail, low ambient cooling will not be  
allowed. Defrost will occur at each time interval during heating  
operation, but will terminate after 5 minutes.  
If there is a thermistor out--of--range error, defrost will occur at  
each time interval during heating operation, but will terminate after  
5 minutes.  
Temperature Thermistors  
Thermistors are electronic devices which sense temperature. As the  
temperature increases, the resistance decreases. Thermistors are  
used to sense outdoor air (OAT), coil temperature (OCT) and the  
suction line thermistor (OST) located between the reversing valve  
and the accumulator.  
Count the number of short and long flashes to determine the  
appropriate flash code. Table 7 gives possible causes and actions  
related to each error.  
Refer to Table 4 and Fig. 14 for resistance values versus  
temperature.  
Table 4 – Resistance Values versus Temperature  
TEMPERATURE  
25.0° C (77.0° F)  
0.0° C (32.0° F)  
RESISTANCE (ohms)  
10.0 + / - 2.3%  
32.6 + / - 3.2%  
-28.0° C (-18.4° F)  
85.5 + / - 3.4%  
13  
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Outdoor Coil Thermistor  
Suction Thermistor (OST)  
The outdoor coil thermistor is a 10Kohm resistor used for multiple  
system operations. It provides the coil/liquid line temperature to  
the heat pump board and user interface. Low ambient operation,  
defrost initiation, defrost termination and assistance with OAT  
temperature measurement of some of the functions. The sensor  
must be securely mounted to the tube connecting the EXV and  
distributor. See Fig. 15 for proper placement. See Table 4 for  
proper resistances.  
Suction Thermistor is used for assisting in EXV control and must  
be secured on the suction tube and aligned longitudinally to the  
vertical surface of the tube axis (see Fig. 17).  
!
CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
OAT Thermistor must be  
locked in place with  
spherical nib end facing  
towards the front of the  
control box  
In order to minimize the ambient influence, make sure the  
thermistor curved surface hugs the pipe surface and is  
secured tight using the wire tie fished through the original  
slot insulating polymer body.  
Variable Speed Compressor Sensor Output Terminals  
This compressor has a motor thermistor and a scroll thermistor.  
Correct resistance between scroll thermistor terminal and common  
is 10k at 77_F (25_C). Correct resistance between motor  
thermistor terminal and common is 5k at 77_F (25_C).  
Variable Speed Compressor Power Input Terminals  
This compressor operates with a 3--phase variable frequency PWM  
variable voltage to the three fusite terminals.  
A11142  
Fig. 15 -- OAT Thermistor Location (Bottom of Control Box)  
Table 5 – Variable Speed Compressor Resistances  
(winding resistance at 70_F20_F)  
280ANV024  
280ANV036  
280ANV048  
280ANV060  
WINDING  
Between terminals  
T1, T2, and T3  
.681  
.203  
Between terminal &  
ground  
>1 mega OHM  
>1 mega OHM  
OCT SENSOR  
LOCATION  
!
CAUTION  
A11143  
Fig. 16 -- Outdoor Coil Thermistor (OCT) Attachment  
(On Distributor Tube)  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment damage  
and/or improper operation.  
Do not use Meggar for measuring the winding resistance.  
ECM Fan Motor  
If verification of proper operation is required for the ECM motor  
used in this unit, follow these steps:  
PRESSURE TRANSDUCER (SPT)  
ACCUMULATOR TUBE  
SUCTION TUBE  
1. Verify that the 230v input to the transformer is present.  
COMPRESSOR  
SUCTION THERMISTOR (OST)  
2. Verify that the control board is powered 18 volts to 30 volts  
from the transformer.  
ACCUMULATOR  
3. With the UI in charging mode in cooling, measure the DC  
voltage between the PWM 1 and PWM 2 terminals on the  
outdoor control board. The DC voltage and PWM (option-  
al) measured must be as shown in Table 6.  
REVERSING VALVE  
Table 6 – DC Voltage and PWM Measurement  
Unit Size  
024, 036  
048, 060  
Voltage  
8.9 VDC  
11.1 VDC  
PWM  
SUCTION SERVICE VALVE  
52  
84  
A11103  
Fig. 17 - Suction Thermistor (OST) Attachment  
(On Suction Tube)  
14  
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EXAMPLE:  
Status Codes  
3 short flashes followed by 2 long flashes indicates a 32 code.  
Table 7 shows this to be low pressure switch open.  
Table 7 shows the status codes flashed by the amber status light.  
Most system problems can be diagnosed by reading the status code  
as flashed by the amber status light on the control board.  
The codes are flashed by a series of short and long flashes of the  
status light. The short flashes indicate the first digit in the status  
code, followed by long flashes indicating the second digit of the  
error code.  
Emergency Mode Connections with a Conventional  
Dual Fuel Thermostat  
In an emergency, it is possible to replace the UI with a  
conventional heat pump thermostat (must be dual fuel capable if  
using a furnace), see Fig. 19 for wiring. However, this emergency  
mode operation is limited to a single, maximum compressor speed  
in heating and a single maximum cooling speed.  
The short flash is 0.25 seconds ON and the long flash is 1.0 second  
ON. Time between flashes is 0.25 seconds. Time between short  
flash and first long flash is 1.0 second. Time between code  
repeating is 2.5 seconds with LED OFF.  
Codes are easily read from user interface (UI)  
User Interface (UI)  
Furnace or Fan Coil  
VS HP  
No  
Use  
D
C
B
A
D
C
B
A
C and D  
not required on  
VS Heat Pump  
C
B
A
Humidifier  
A12055  
Fig. 18 -- Evolution Furnace or Fan Coil Wiring with  
Communicating Variable Speed HP  
VARIABLE  
Furnace or Fan Coil  
SPEED HP  
A
B
C
A
B
C
D
  
  
Conventional  
Dual-Fuel  
Thermostat  
UT  
IL  
C
LS  
Y
O
A12047  
Fig. 19 -- Variable Speed Unit Connected to a Conventional  
Dual Fuel Thermostat in an Emergency Mode  
15  
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1
BRN  
SEC2  
RED  
YEL  
BLU  
EXV  
SEC1  
PWM2  
PWM1  
PL4  
CC  
PL3  
PL2  
SPT  
HPS  
PL11  
PL6  
CB  
OST  
RVS  
PL1  
OCT  
OAT  
STATUS  
COMM  
J2  
C
LS  
O
Y
UTIL  
PL8  
FORCED  
A B C NO  
USE  
MODEL  
DEFROST  
Utility Interface*  
A11544  
Fig. 20 -- Variable Speed Control Board  
with optional Utility Relay  
1
BRN  
SEC2  
RED  
YEL  
BLU  
EXV  
SEC1  
PWM2  
PWM1  
CC  
PL4  
SPT  
PL3  
PL2  
HPS  
PL11  
OST  
CB  
RVS  
PL6  
PL1  
OCT  
OAT  
STATUS  
COMM  
J2  
C
LS  
O
Y
UTIL  
PL8  
FORCED  
A B C NO  
USE  
MODEL  
DEFROST  
LLS  
A11379  
Fig. 21 -- Variable Speed Control Board connected to optional Liquid Line Solenoid.  
16  
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Table 7 – Troubleshooting  
FLASH CODE  
(AMBER LED)  
RESET TIME  
(minutes)  
FAULT DESCRIPTION SENT TO UI  
--- ---  
--- ---  
Standby  
ON, no flash  
Variable Capacity or Emergency  
Mode  
1, pause  
1 (2 sec ON), longer pause (1  
second OFF)  
--- ---  
Variable Speed Range Cutback  
Communications Loss  
16  
25  
31  
32  
45  
46  
48  
49  
53  
54  
55  
56  
57  
58  
59  
68  
69  
71  
72  
75  
77  
79  
82  
83  
84  
85  
86  
88  
91  
92  
93  
94  
95  
96  
97  
98  
99  
OFF  
NA  
Invalid Model  
NA  
High Pressure Switch Open  
Low Pressure Trip  
15  
15  
Control Fault  
NA  
Brownout  
Revert to 5 min cycle delay  
Lost Inverter Communications  
230VAC Dropout---Reset Event  
Outdoor Air Temp Sensor Fault  
Suction Temp Sensor Fault  
Coil Temp Sensor Fault  
Revert to 5 min cycle delay  
Revert to 5 min cycle delay  
NA  
15  
NA  
OAT---OCT Thermistor Out of range  
Suction Pressure Sensor Fault  
OAT---OST Thermistor Out of range  
Compressor Scroll Temp Out of Range  
Compressor Sump Heating Active  
Inverter / Compressor Internal Fault  
Compressor Motor Temp Out of Range  
Suction Over Temperature  
Inverter Temp Out of Range Event  
Inverter Over Current  
NA  
15  
5
15  
2 HOURS  
15  
15  
15  
15  
15  
Compressor No---Pump Event  
Suction Over Temp Lockout  
Low Pressure Lockout for 4 hours  
High Pressure Lockout for 4 hours  
Compressor Temp Lockout  
Compressor Temp Sensor Fault  
Inverter Temp Lockout  
15  
4 Hours  
4 HOURS  
4 HOURS  
4 HOURS  
15  
4 HOURS  
15  
Inverter VDC---Out Over Voltage  
Inverter VDC---Out Under Voltage  
230VAC Under Voltage  
15  
15  
230VAC Over Voltage  
15  
High Current Lockout  
2 HOURS  
2 HOURS  
2 HOURS  
10  
VDC Under Voltage Lockout  
VDC Over Voltage Lockout  
High Torque Event  
High Torque Lockout  
2 HOURS  
NA  
--- ---  
17  
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FINAL CHECKS  
CARE AND MAINTENANCE  
For continuing high performance and to minimize  
possible equipment failure, periodic maintenance must be  
performed on this equipment.  
Frequency of maintenance may vary depending upon  
geographic areas, such as coastal applications. See  
Owner’s Manual for information.  
IMPORTANT: IMPORTANT: Before leaving job, be  
sure to do the following:  
1. Ensure that all wiring is routed away from tubing  
and sheet metal edges to prevent rub--through or  
wire pinching.  
2. Ensure that all wiring and tubing is secure in unit  
before adding panels and covers. Securely fasten  
all panels and covers.  
3. Tighten service valve stem caps to 1/12--turn past  
finger tight.  
4. Leave Users Manual with owner. Explain system  
operation and periodic maintenance requirements  
outlined in manual.  
5. Fill out Dealer Installation Checklist and place in  
customer file.  
PURONR (R--410A) REFRIGERANT QUICK REFERENCE GUIDE  
S Puron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement  
components are designed to operate with Puron refrigerant.  
S Puron refrigerant cylinders are rose colored.  
S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.  
S Puron refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose  
when charging into suction line with compressor operating.  
S Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low--side retard.  
S Use hoses with 700 psig service pressure rating.  
S Leak detectors should be designed to detect HFC refrigerant.  
S Puron refrigerant, as with other HFCs, is only compatible with POE oils.  
S Vacuum pumps will not remove moisture from oil.  
S Do not use liquid--line filter driers with rated working pressures less than 600 psig.  
S Do not leave Puron refrigerant suction line filter driers in line longer than 72 hours.  
S Do not install a suction--line filter drier in liquid--line.  
S POE oils absorb moisture rapidly. Do not expose oil to atmosphere.  
S POE oils may cause damage to certain plastics and roofing materials.  
S Wrap all filter driers and service valves with wet cloth when brazing.  
S A factory--approved liquid--line filter drier is required on every unit.  
S Do NOT use an R--22 TXV.  
S If indoor unit is equipped with an R--22 TXV or piston metering device, it must be changed to a hard--shutoff Puron refrigerant  
TXV.  
S Never open system to atmosphere while it is under a vacuum.  
S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter  
driers. Evacuate to 500 microns prior to recharging.  
S Do not vent Puron refrigerant into the atmosphere.  
S Do not use capillary tube coils.  
S Observe all warnings, cautions, and bold text.  
S All indoor coils must be installed with a hard--shutoff Puron refrigerant TXV metering device.  
EBryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 02/12  
Catalog No. II280A--- 0 1  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Replaces: New  
18  
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