Goodman DSZC160241AA, DSZC160241AB, DSZC160241AC, DSZC160361AA, DSZC160361AB Installation Manual

...

CONDENSING UNIT

HEAT PUMP INSTALLATION & SERVICE REFERENCE

MPORTANT SAFETY INSTRUCTIONS

The following symbols and labels are used throughout this manual to indicate immediate or potential safety hazards. It is the owner’s and installer’s responsibility to read and comply with all safety information and instructions accompanying these symbols. Failure to heed safety information increases the risk of personal injury , property damage, and/or product damage.

HIPPING INSPECTION

HIGH VOLTAGE!

ISCONNECT

ULTIPLE POWER SOURCES MAY BE PRESENT

TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH

ALL

POWER BEFORE SERVICING

WARNING

. F

AILURE

Always keep the unit upright; laying the unit on its side or top may cause equipment damage. Shipping damage, and subsequent investigation is the responsibility of the carrier. V erify the model number, specifications, electrical characteristics, and accessories are correct prior to installation. The distributor or manufacturer will not accept claims from dealers for transportation damage or installation of incorrectly shipped units.

ODES

& R

EGULATIONS

ONLY

INDIVIDUALS MEETING THE REQUIREMEN TS OF AN

ECHNICIA N

ONDITIONING

USE THIS INFORMATION WITHOUT SUCH BACKGROUND MAY RESU LT IN PRODUCT DAMAGE PERSONAL INJURY, OR DEATH

”

AT A MINIMUM

, H

EATING AND REFRIGERATION INSTITU TE

WARNING

“E

NTRY LEVEL

AS SPECIFIED BY THE AIR

(AHRI)

. A

TTEMPTING TO INSTALL OR REPAIR THIS UNIT

MAY

This product is designed and manufactured to comply with national codes. Installation in accordance with such codes and/or prevailing local codes/regulations is the responsibility of the installer . The manufacturer assumes no responsibility for equipment installed in violation of any codes or regulations. Rated performance is achieved after 72 hours of operation. Rated performance is delivered at the specified airflow. See outdoor unit specification sheet for split system models or product specifi-

CROLL EQUIPPE D UNITS SHOULD NEVER BE USED TO EVACUATE THE AIR CONDITIONING SYSTEM ELECTRICAL ARCING RESU LTING IN A DAMAGED OR FAILED COMPRESSOR

CAUTION

. V

ACUUMS THIS LOW CAN CAUSE INTERNAL

cation sheet for packaged and light commercial models. Specification sheets can be found at www.goodmanmfg.com for Goodman® brand products or www.amana-hac.com for Amana® brand products. Within either website, please select the residential or commercial products menu and then select the submenu for the type of product to be installed, such as air conditioners or heat pumps, to access a list of product pages that each contain links to that model’s specification sheet.

The United States Environment al Protection Agency (EP A) has issued various regulations regarding the introduction and disposal of refrigerants. Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines. Should you have any questions please contact the local of fice of the EP A.

If replacing a condensing unit or air handler, the system must be manufacturer approved and Air Conditioning, Heating and Refrigeration Institute (AHRI) matched. NOTE: Installation of unmatched systems is strongly discouraged.

Outdoor units are approved for operation above 55°F in cooling mode. Operation below 55°F in cooling mode requires the use of an approved low ambient kit.

Operating the unit in a structure that is not complete (either as part of new construction or renovation) will void the warranty.

EA TURES

This heat pump is a part of the ComfortNet™ family of products. It may be installed as part of a “legacy” system using a standard 24 V AC thermostat. However , with the CTK0* ComfortNet™ thermostat kit, this heat pump may be installed as part of a digitally communicating system. The ComfortNet system provides automatic airflow configuration, enhanced setup features, and enhanced diagnostics. It also reduces the number of thermostat wires to a maximum of four and a minimum of two.

is a registered trademark of Maytag Corporation or its related companies and is used under

NST ALLATION CLEARANCES

Special consideration must be given to location of the condensing unit(s) in regard to structures, obstructions, other units, and any/ all other factors that may interfere with air circulation. Where possible, the top of the unit should be completely unobstructed; however, if vertical conditions require placement beneath an obstruction there should be a minimum of 60 inches between the top of the unit and the obstruction(s). The specified dimensions meet requirements for air circulation only. Consult all appropriate regulatory codes prior to determining final clearances.

Another important consideration in selecting a location for the unit(s) is the angle to obstructions. Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance. Corner installations are strongly discouraged.

This unit can be located at ground floor level or on flat roofs. At ground floor level, the unit must be on a solid, level foundation that will not shift or settle. To reduce the possibility of sound transmission, the foundation slab should not be in contact with or be an integral part of the building foundation. Ensure the foundation is sufficient to support the unit. A concrete slab raised above ground level provides a suitable base.

NOT

RECOMMENDED

B B B

AA AAA

Model Type A B C AA Residential

Light Commercial

Minimum Airflow Clearance

10" 10" 18" 20" 12" 12" 18" 24"

OK!

OOFTOP INST ALLATIONS

If it is necessary to install this unit on a roof structure, ensure the roof structure can support the weight and that proper consideration is given to the weather-tight integrity of the roof. Since the unit can vibrate during operation, sound vibration transmission should be considered when installing the unit. Vibration absorbing pads or springs can be installed between the condensing unit legs or frame and the roof mounting assembly to reduce noise vibration.

NOTE: These units require special location consideration in areas of heavy snow accumulation and/or areas with prolonged continuous subfreezing temperatures. Heat pump unit bases have cutouts under the outdoor coil that permit drainage of frost accumulation. Situate the unit to permit free unobstructed drainage of the defrost water and ice. A minimum 3” clearance under the outdoor coil is required in the milder climates.

In more severe weather locations, it is recommended that the unit be elevated to allow unobstructed drainage and air flow. The elevation minimums at right are recommended:

AFE REFRIGERANT HANDLING

Design Temperature Suggested Minimum Elevation

+15° and above 2 1/2"

-5° to +14° 8" below -5° 12"

While these items will not cover every conceivable situation, they should serve as a useful guide.

AVOID POSSIBLE INJURY, EXPLOSION OR DEATH, PRACTICE SAFE

HANDLING OF REFRIGERANTS

WARNING

AVOID POSSIBLE EXPLOSION, USE ONLY RETU RNABLE (NOT DISPOSABLE) SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM A SYSTEM

• E

• E W

NSURE THE CYLINDER IS FREE OF DAMAGE WHICH COUL D LEAD TO A

LEAK OR EXPLOSION

NSURE THE HYDROSTATI C TEST DATE DOES NOT EXCEED NSURE THE PRESSURE RATING MEETS OR EXCEEDS

HEN IN DOUBT, DO NOT USE CYLINDER

YEARS

400

PSIG

WARNING

EFRIGERANTS ARE HEAVIER THAN AIR OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSE D SPACE POSSIBLE DIFFICULTY IN BREATHING OR DEATH

EVER PURGE REFRIGERANT INTO AN ENCLOSE D ROOM OR SPACE

• N

LAW, ALL REFRIGERANTS MUST BE RECLAIMED

F AN INDOOR LEAK IS SUSPECTED, THOROUGHLY VENTI LATE THE AREA

• I

BEFORE BEGINNING WORK

IQUID REFRIG ERANT CAN BE VERY COLD

• L

OR BLINDNESS, AVOID CONTA CT AND WEAR GLOVES AND GOGGLES

LIQUID REFRIGE RANT DOES CONTA CT YOUR SKIN OR EYES, SEEK MEDICAL

HELP IMMEDIATELY

LWAYS FOLLOW

• A

OISONOUS GAS WILL BE PRODUCED

EP A

REGULATIONS

. T

HEY CAN “PUSH OUT” THE

. TO

AVOID

. TO

AVOID POSSIBLE FROST BITE

. N

EVER BURN REFRIGERANT, AS

. BY

. IF

WARNING

AVOID POSSIBLE EXPLOSION

• N

EVER APPLY FLAME OR STEAM TO A REFRIG ERANT CYLINDER MUST HEAT A CYLINDER FOR FASTER CHARGING, PARTIALLY IMMERSE IT IN WARM WATER

EVER FILL A CYLINDER MORE THAN

• N

EVER ADD ANYTHING OTHER THAN

• N

TO AN

410A

BE LISTED OR CERTIFIED FOR THE TYPE OF REFRIG ERANT USED

TORE CYLINDERS IN A COOL, DRY PLACE

• S

LATFORM OR A ROLLER

R-410A

CYLINDER

80%

FULL OF LIQUID REFRIG ERANT

R-22 TO AN R-22

. THE

SERVICE EQUIPM ENT USED MUST

. N

EVER USE A CYLINDER AS A

. IF

CYLINDER OR

YOU

R-

EFRIGERANT LINES

Use only refrigerant grade (dehydrated and sealed) copper tubing to connect the condensing unit with the indoor evaporator. After cutting the tubing, install plugs to keep refrigerant tubing clean and dry prior to and during installation. Tubing should always be cut square keeping ends round and free from burrs. Clean the tubing to prevent contamination.

Do NOT let refrigerant lines come in direct contact with plumbing, ductwork, floor joists, wall studs, floors, and walls. When running refrigerant lines through a foundation or wall, openings should allow for sound and vibration absorbing material to be placed or installed between tubing and foundation. Any gap between foundation or wall and refrigerant lines should be filled with a pliable silicon-based caulk, RTV or a vibration damping material. A void suspending refrigerant tubing from joist s and studs with rigid wire or straps that would come in contact with the tubing. Use an insulated or suspension type hanger. Keep both lines separate and always insulate the suction line.

These sizes are suitable for line lengths of 79 feet or less. If a run of more than eighty feet is required, refer to Remote Cooling Service Manual, or TP-106 Long Line Set Application R-22, or TP-107 Long Line Set Application R-410A or contact your distributor for assistance.

CAUTION

THE

COMPRESSOR SUSCEPTIBLE TO MOISTURE ABSORPTION AND COUL D CAUSE COMPRESSOR FAILURE ANY LONGER THAN NECESSARY FOR INSTALLATION

POE

OIL FOR

R-410A

. DO

NOT LEAVE SYSTEM OPEN TO ATMOSPHERE

UNITS IS EXTREMELY

RECOMMENDED INTERCONNECTING TUBING (Ft)

Cond

Unit

0-24 25-49 50-79*

Line Diameter ( In . OD)

Tons Suct Liq Suct Liq Suct Liq

1 1/2 5/8 1/4 3/4 3/8 3/4 3/ 8

2 5/81/43/43/83/43/8

2 1/2 5/8 1/4 3/4 3/8 7/8 3/ 8

3 3/4 3/8 7/8 3/8 1 1/8 3/8

3 1/2 7/8 3/8 1 1/8 3/8 1 1/8 3/8

4 7/ 8 3/8 1 1/8 3/8 1 1/8 3/8 5 7/ 8 3/8 1 1/8 3/8 1 1/8 3/8

* Lines greater than 79 feet in length or vertical elevation changes more than 50 feet

Service Manual or contact your distributor for assistance.

refer to the Remote Cool ing

Insulation is necessary to prevent condensation from forming and dropping from the suction line. Armaflex (or satisfactory equivalent) with 3/8” min. wall thickness is recommended. In severe conditions (hot, high humidity areas) 1/2” insulation may be required. Insulation must be installed in a manner which protects tubing from damage and contamination.

Where possible, drain as much residual compressor oil from existing systems, lines, and traps; pay close attention to low areas where oil may collect. NOTE: If changing refrigerant types, ensure the indoor coil and metering device is compatible with the type of refrigerant being used; otherwise, the indoor coil must be replaced.

URYING REFRIGERANT LINES

If burying refrigerant lines can not be avoided, use the following checklist.

1. Insulate liquid and suction lines separately .

2. Enclose all underground portions of the refrigerant lines in waterproof material (conduit or pipe) sealing the ends where tubing enters/exits the enclosure.

3. If the lines must pass under or through a concrete slab, ensure lines are adequately protected and sealed.

EFRIGERANT LINE CONNECTIONS

IMPORTANT

T o avoid overheating the service valve, TXV valve, or filter drier while brazing, wrap the component with a wet rag, or use a thermal heat trap compound. Be sure to follow the manufacturer’s instruction when using the heat trap compound. Note: Remove Schrader valves from service valves before brazing tubes to the valves. Use a brazing alloy of 2% minimum silver content. Do not use flux.

Torch heat required to braze tubes of various sizes is proportional to the size of the tube. T ubes of smaller size require less heat to bring the tube to brazing temperature before adding brazing alloy . Applying too much heat to any tube can melt the tube. Service personnel must use the appropriate heat level for the size of the tube being brazed. NOTE: The use of a heat shield when brazing is recommended to avoid burning the serial plate or the finish on the unit.

1. The ends of the refrigerant lines must be cut square, deburred, cleaned, and be round and free from nicks or dents. Any other condition increases the chance of a refrigerant leak.

2. “Sweep” the refrigerant line with nitrogen or inert gas during brazing to prevent the formation of copper-oxide inside the refrigerant lines. The POE oils used in R-410A applications will clean any copper-oxide present from the inside of the refrigerant lines and spread it throughout the system. This may cause a blockage or failure of the metering device.

3. After brazing, quench the joints with water or a wet cloth to prevent overheating of the service valve.

4. Ensure the filter drier paint finish is intact after brazing. If the paint of the steel filter drier has been burned or chipped, repaint or treat with a rust preventative. This is especially important on suction line filter driers which are continually wet when the unit is operating.

NOTE: Be careful not to kink or dent refrigerant lines. Kinked or dented lines will cause poor performance or compressor damage.

Do NOT make final refrigerant line connection until plugs are removed from refrigerant tubing. NOTE: Before brazing, verify indoor TXV is correct for R410A and proper size.

EAK TESTING

ITROGEN OR NITROGEN-TRACED

)

WARNING

Pressure test the system using dry nitrogen and soapy water to locate leaks. If you wish to use a leak detector, charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure then apply the detector to suspect areas. If leaks are found, repair them. After repair, repeat the pressure test. If no leaks exist, proceed to system evacuation.

AVOID THE RISK OF FIRE OR EXPLOSION, NEVER USE OXYGEN, HIGH PRESSURE AIR OR FLAMMABLE GASES FOR LEAK TESTING OF A REFRIGERATION SYSTEM

WARNING

AVOID POSSIBLE EXPLOSION, THE LINE FROM THE NITROGEN CYLINDER MUST INCLUDE A PRESSURE REGULATOR AND A PRESSURE RELIEF VALVE NO MORE THAN

. THE

PRESSURE RELIEF VALVE MUST BE SET TO OPEN AT

150

PSIG

YSTEM EVACUATION

Condensing unit liquid and suction valves are closed to contain the charge within the unit. The unit is shipped with the valve stems closed and caps installed. Do not open valves until

the system is evacuated.

WARNING

REFRIGERANT UNDER PRESSURE!

AILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH

NOTE: Scroll compressors should never be used to evacuate or pump down a heat pump or air conditioning system.

1. Connect the vacuum pump with 250 micron capability to the service valves.

2. Evacuate the system to 250 microns or less using suction and liquid service valves. Using both valves is necessary as some compressors create a mechanical seal separating the sides of the system.

3. Close pump valve and hold vacuum for 10 minutes. Typically pressure will rise during this period.

• If the pressure rises to 1000 microns or less and remains steady the system is considered leak-free; proceed to startup.

• If pressure rises above 1000 microns but holds steady below 2000 microns, moisture and/or noncondensibles may be present or the system may have a small leak. Return to step 2: If the same result is encountered check for leaks as previously indicated and repair as necessary then repeat evacuation.

• If pressure rises above 2000 microns, a leak is present. Check for leaks as previously indicated and repair as necessary then repeat evacuation.

LECTRICAL CONNECTIONS

The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protection. Wires should be sized to limit voltage drop to 2% (max.) from the main breaker or fuse panel to the condensing unit. Consult the NEC, CEC, and all local codes to determine the correct wire gauge and length.

Local codes often require a disconnect switch located near the unit; do not install the switch on the unit. Refer to the installation instructions supplied with the indoor furnace/air handler for specific wiring connections and indoor unit configuration. Likewise, consult the instructions packaged with the thermostat for mounting and location information.

CAUTION

ROLONGED OPERATION AT SUCTION PRESSURES LESS THAN FOR MORE THAN SCROLLS AND PERMANENT DAMAGE TO THE SCROLL TIPS, DRIVE BEARINGS AND INTERNAL SEAL

5000 4500 4000 3500

MICRONS

3000

2500

ACUUM

2000

1500 1000

500

SECONDS WILL RESU LT IN OVERHEAT ING OF THE

LEAK(S) PRESENT

CONDENSIBLES OR SMALL LEAK PRESENT

NO LEAKS NO CONDENSIBLES

0 1 2 3 4 5 6 7 8 9

MINUTES

WARNING

HIGH VOLTAGE!

ISCONNECT

ULTIPLE POWER SOURCES MAY BE PRESENT

TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK MUST CONFO RM WITH CODES EQUIPM EN T PERFORMANCE, EQUIPM EN T DAMAGE OR FIRE

AVOID THE RISK OF FIRE OR EQUIPM EN T DAMAGE, USE COPPER

CONDUCTORS

ALL

POWER BEFORE SERVICING

NEC OR CEC

. U

NDERSIZED WIRES COUL D CAUSE POOR

AND ALL LOCAL

WARNING

. W

. F

AILURE

IRING

PSIG

VERCURRENT PROTECTION

The following overcurrent protection devices are approved for use.

• Time delay fuses

• HACR type circuit breakers

These devices have sufficient time delay to permit the motor-compressor to start and accelerate its load.

IGH VOLTAGE CONNECTIONS

Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover .

LOW V

OL TAGE CONNECTIONS

Condensing unit control wiring requires a nominal 24 V AC (+/- 6 V AC), 60 Hz, minimum 25 V A service from either the indoor or an optional outdoor transformer. Low volt age wiring for the condensing units depends on the thermostat used. The unit is designed to work as part of a fully communicating HV AC system utilizing the ComfortNet™ CTK0* thermostat, ComfortNet™ compatible indoor unit, and up to four wires.

The unit also has legacy 24 V AC inputs to support non-communicating systems. Route control wires through the low voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover.

NOTE: For two-stage units, refer to the Installation Instructions supplied with the variable speed indoor units for field wiring connections.

NOTE: If the heat pump unit is wired in the communicating mode together with a compatible communicating indoor unit and CTK0* communicating thermostat, then the communicating thermostat is able to search and identify the condensing unit when power is applied to the system. Refer to the Installation Manual of the optional communicating thermostat for more information.

Use the dipswitch to select defrost time interval (30, 60, 90, 120 minutes; see chart below).

30 Min ut e s

Factory default setting is 30 minutes. The maximum defrost cycle time is 10 minutes.

90 Minutes

Voltage Ports

30 0

60 Minutes

120 Minutes

HIGH VOLTAGE PORT

LOW VOLTAGE PORT

30 0

Dipswitch Settings for Selection

YSTEM START UP

NOTE: Power must be supplied to the 18 SEER outdoor units containing ECM motors before the power is applied to the indoor unit. Sending a low voltage signal without high voltage power present at the outdoor unit can cause malfunction of the control module on the ECM motor.

Adequate refrigerant charge for the matching evaporator coil or air handler and 15 feet of lineset is supplied with the condensing unit. If using evaporator coils or air handlers other than HSVTC coil it maybe necessary to add or remove refrigerant to attain proper charge. If line set exceeds 15 feet in length, refrigerant should be added at .6 ounces per foot of liquid line.

NOTE: Charge should always be checked using superheat when using a piston and subcooling when using TXV equipped indoor coil to verify proper charge.

Open the suction service valve first! If the liquid service valve is opened first, oil from the compressor may be drawn into the indoor coil TXV , restricting refrigerant flow and affecting operation of the system.

When opening valves with retainers, open each valve only until the top of the stem is 1/8” from the retainer . To avoid loss of refrigerant, DO NOT apply pressure to the retainer . When opening valves without a retainer remove service valve cap and insert a hex wrench into the valve stem and back out the stem by turning the hex wrench counterclockwise. Open the valve until it contacts the rolled lip of the valve body .

NOTE: These are not back-seating valves. It is not necessary to force the stem tightly against the rolled lip. After the refrigerant charge has bled into the system, open the liquid service valve. The service valve cap is the secondary seal

for the valve and must be properly tightened to prevent leaks. Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap. Tighten cap finger-tight and then tighten additional 1/6 of a turn (1 wrench flat) to properly seat the sealing surfaces.

POSSIBLE REFRIGERANT LEAK!

AVOID A POSSIBLE REFRIG ERANT LEAK, OPEN THE SERVICE VALVES

UNTIL THE TOP OF THE STEM IS

of Defrost Time

CAUTION

1/8”

FROM THE RETAINER

Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor.

1. Break vacuum by fully opening liquid and suction base valves.

2. Set thermostat to call for cooling. Check indoor and outdoor fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves.

HARGE VERIFICA TION

WARNING

CAUTION

USE

REFRIG ERANT CERTIFIED TO MAY CAUSE COMPRESSOR DAMAGE, AND IS NOT COVERED UNDER THE WARRANTY REFRIG ERANT TO MEET

. M

OST PORTABLE MACHINES CANNOT CLEAN USED

AHRI

STANDARDS

. U

SED REFRIG ERANT

REFRIGERANT UNDER PRESSURE!

• DO

NOT OVERCHARGE SYSTEM WITH REFRIG ERANT

O NOT OPERATE UNIT IN A VACUUM OR AT NEGATIVE PRESSURE

• D

AILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH

NOTICE

IOLATION OF

PENALTIES

INAL CHARGE ADJUSTMENT

EPA

REGULATIONS MAY RESU LT IN FINES OR OTHER

PERATING THE COMPRESSOR WITH THE SUCTION VALVE CLOSED MAY

CAUSE SERIOUS COMPRESSOR DAMAGE

The outdoor temperature must be 60°F or higher. Set the room thermost at to COOL, fan switch to AUTO, and set the temperature control well below room temperature.

After system has stabilized per startup instructions, check subcooling and superheat as detailed in the following section.

SATURATED SUCTION PRESSURE

TEMPERATURE CHART

SUCTION PRESSURE

P SIG R-22 R-410A

50 26 1 52 28 3 54 29 4 56 31 6 58 32 7 60 34 8 62 35 10 64 37 11 66 38 13 68 40 14 70 41 15 72 42 16 74 44 17 76 45 19 78 46 20 80 48 21 85 50 24 90 53 26

95 56 29 100 59 31 110 64 36 120 69 41 130 73 45 140 78 49 150 83 53 160 86 56 170 90 60

SATURATED SUCTI ON

TEMPERATURE ºF

LIQUID PRESSURE

SATURATED LIQUID PRESSURE

TEMPERATURE CHART

P SIG R-22 R - 410A

200 101 70 210 105 73 220 108 76 225 110 78 235 113 80 245 116 83 255 119 85 265 121 88 275 124 90 285 127 92 295 130 95 305 133 97 325 137 101 355 144 108 375 148 112 405 155 118 415 157 119 425 n/a 121 435 n/a 123 445 n/a 125 475 n/a 130 500 n/a 134 525 n/a 138 550 n/a 142 575 n/a 145 600 n/a 149 625 n/a 152

CAUTION

SATUR ATED LIQU ID

TEMPERATURE ºF

XPANSION VALVE SYSTEM

NOTE: Units matched with indoor coils equipped with non-adjustable TXV should be charged by subcooling only .

Run the unit on low stage cooling for 10 minutes until refrigerant pressures stabilize. Use the following guidelines and meth-

PREVENT PERSONAL INJURY, CAREFULLY CONNECT AND DISCONNECT MANIFOLD GAUGE HOSES BURNS

. DO

NOT VENT REFRIG ERANT INTO THE ATMOSPHERE ALL REFRIG ERANT DURING SYSTEM REPAIR AND BEFORE FINAL UNIT DISPOSAL

CAUTION

. E

SCAPING LIQUID REFRIGERANT CAN CAUSE

. R

ECOVER

ods to check unit operation and ensure that the refrigerant charge is within limits. Charge the unit on low stage.

1. Purge gauge lines. Connect service gauge manifold to base-valve service ports. Run system at least 10 minutes to allow pressure to stabilize.

2. T emporarily inst all a thermometer on the liquid line at the liquid line service valve and 4-6" from the compressor on the suction line. Ensure the thermometer makes adequate contact and is insulated for best possible readings. Use liquid line temperature to determine subcooling and vapor temperature to determine superheat.

3. Check subcooling and superheat. Systems with TXV application should have a subcooling of 5 to 7°F and superheat of 7 to 9 °F.

a. If subcooling and superheat are low, adjust TXV to 7 to 9 ºF superheat, then check subcooling.

NOTE: T o adjust superheat, turn the valve stem clockwise to increase and counter clockwise to decrease. b. If subcooling is low and superheat is high, add charge to raise subcooling to 5 to 7 °F then check superheat. c. If subcooling and superheat are high, adjust TXV valve to 7 to 9 ºF superheat, then check subcooling. d. If subcooling is high and superheat is low, adjust TXV valve to 7 to 9 ºF superheat and remove charge to lower the

subcooling to 5 to 7 ºF.

NOTE: Do NOT adjust the charge based on suction pressure unless there is a gross undercharge.

4. Disconnect manifold set, installation is complete.

SUBCOOLING FORMULA = SAT. LIQUID TEMP. - LIQUID LINE TEMP.

NOTE: Check the Schrader ports for leaks and tighten valve cores if necessary . Install cap s finger-tight.

EAT PUMP

- H

EATING CYCLE

The proper method of charging a heat pump in the heat mode is by weight with the additional charge adjustments for line size, line length, and other system components. For best results on outdoor units with TXVs, superheat should be 2-5° at 4-6" from the compressor. Make final charge adjustment s in the cooling cycle.

ADDITIONAL NOTES

1. There are (3) 7-segment LED displays on the PCB. Refer to the Troubleshooting chart at the end of this manual for definitions of the LED status.

2. “TERM” dip switch is used for communications bus configuration. Leave the settings to the factory default position.

3. “LEARN” push button is used in communication mode to support device recognition on start-up. As the communication system supports automatic identification of both indoor unit and outdoor unit, this button is not used for a normal start-up.

4. Press “TEST” push button, during system “Standby” mode to turn on both the compressor and outdoor fan for five seconds.

5. The “RECALL” push button is used to retrieve the six most recent faults. The control must be in Standby Mode (no thermostat inputs) to use the feature. Depress the push button for approximately two seconds and less than five seconds. The 7-segment LED displays will then display the six most recent faults beginning with the most recent fault and decrementing to the least recent fault. The faults may be cleared by depressing the button for greater than five seconds. Consecutively repeated faults are displayed a maximum of three times. Refer to the fault code definitions at the end of this manual for more details.

6. A forced defrost can be initiated by pressing “TEST” and “RECALL” push buttons simultaneously for more than 1 second with a valid call for heat. The forced defrost can be terminated by

• A 10 minute lapse in time,

• A coil temperature rise above 75°F or

• By pressing the two buttons again for more than 1 second.

+ 16 hidden pages