These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE The signal words DANGER, Signal Words in Manuals The signal word WARNING is used throughout this manual in the following manner: WARNING, CAUTION, and NOTE are used to identify levels of 4& hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard.
INSPECT NEW UNIT After uncrating unit, inspect thoroughly for hidden damage. If damage is found, notify the transportation company claim. immediately and file a concealed damage SAFETY CONSIDERATIONS Consult a qualified installer, service agency, or the dealer/distributor for information and assistance. The qualified installer must use factory authorized kits and accessories when modifying this product. Refer to the individual instructions packaged with the kit or accessory when installing.
Figure 1 Clearances (various examples) 24” (610mm) Service 24” (610mm) ) (457mm) Service 1 8” (457mm) 1 8” (457mm) 1 8” (457mm) 6” 6” (152mm) (152mm) 24” (61 Omm) Service 24” (610mm) Service 18” (457mm) 4” (102mm) wide fence 1 8” (457mm) 428 01 5103 02 24” 24” 24” (610mm) (610mm) (610mm) Service Service Service 1 8” (457mm) 1 8” (457mm) 3
UNIT SUPPORT NOTE: Unit must be level + 2 degrees {% inch rise or fall per foot of run (10mm rise or fall per 8305 mm of run) } or compressor may not function properly. A. GROUND LEVEL INSTALLATION The unit must be level and supported above grade by beams, platform, or a pad. Platform or pad can be of open or solid construction but should be of permanent materials such as concrete, bricks, blocks, steel, or pressure- treated timbers approved for ground contact.
REFRIGERATION SYSTEM A. COMPONENT MATCHES Installing with Indoor Piston - cooling operation. Check to see that the proper system componenis are in place, especially the indoor coil. (Heat pumps also use an outdoor piston for heating operation, refer to section F.) R-410A outdoor units can only be used with R-410A specific indoor coils. If there is a refrigerant mis—maitch, consult the indoor coil manufacturer to determine if a refrigerant conversion kit is available for the indoor coil.
B. REFRIGERANT LINE SETS The refrigerant line set must be properly sized to assure maximum efficiency and proper oil circulation. Refer to Product Specifications and Long Applications Guideline for line set sizing. NOTE: (61m). Total line set length must not exceed Line 200 feet NOTE: A crankcase heater must be used when refrigerant line length exceeds 80 feet (24.4m).
C. ROUTING LINES AND SUSPENDING REFRIGERANT Run refrigerant lines as straight and direct as possible, avoiding unnecessary bends and turns. Always insulate the entire suction line. Both lines should be insulated when routed through an attic or when routed through an underground raceway. When routing refrigerant lines through a foundation or wall, do not allow refrigerant lines to come in direct contact with the building structure.
F. SERVICE VALVES Service valves are closed and plugged from the factory. Outdoor units are shipped with a refrigerant charge sealed in the unit. Leave the service valves closed until all other refrigerant system work is complete or the charge will be lost. Leave the plugs in place until line set tubing is ready to be inserted. Heat pumps require a piston metering device in the liquid service valve for proper heating operation.
LINE SET AND INDOOR COIL The unit is shipped with a factory refrigerant charge. The liquid line and suction line service valves have been closed after final testing at the factory. Do not disturb these valves until the line set and indoor coil have been evacuated and leak checked, or the charge in the unit may be lost. NOTE: Do not use any portion of the factory charge for purging or leak testing.
|. OPENING SERVICE VALVES Outdoor units are shipped with a refrigerant charge sealed in the unit. Opening the service valves releases this charge into the system. NOTE: 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. Remove Suction service valve cap and insert a hex wrench into the valve stem.
Figure 11 Typical Thermostat (Control Circuit) Connections NOTE: WHEN USING OUTDOOR THERMOSTATS, Ws MUST BE ENERGIZED WHEN SYSTEMS WITH ONE OUTDOOR THERMOSTAT THERMOSTAT SUBBASE INDOOR SPLICE CONNECTION OUTDOOR SPLICE CONNECTION DEFROST BOARD REQUESTING SUPPLEMENTAL HEAT.
DEFROST SYSTEM Jumper across the DFT terminals on the defrost board (Figure 13). With this method, the defrost thermostat is removed from the circuit, and operation of the defrost thermostat itself will not be observed. A. DEFROST THERMOSTAT The defrost thermostat is factory installed on a short tube stub extending from the coil end plate. Refer to Figure 12 and confirm that the thermostat is securely fastened in place on the tube stub. Figure 12 Skip to #3.
Figure 13 Defrost Control Board a AY acy c2 Ki ope" .
START-UP PROCEDURE 1. Set indoor thermostat selector switch to OFF. 2. Turn ON 3. If unit has a crankcase heater, energize the heater and wait 24 hours before proceeding. 4. Set indoor thermostat at desired temperature. Be sure setpoint is below indoor ambient temperature to call for cooling, or above indoor ambient to call for heating. 5. Set indoor thermostat selector switch to COOL or HEAT. Operate unit for minimum 15 minutes, then check the system refrigerant charge.
A. UNITS WITH COOLING MODE TXV B. UNITS WITH INDOOR PISTON Units installed with cooling mode TXV require charging by the subcooling method. 1. Operate unit a minimum checking charge. of 15 minutes before NOTE: If outdoor unit has a 2-speed fan motor, motor will operate in low speed when outdoor ambient temperature is below 82°F (28°C). Pull the BRN/YEL low voltage wire off the fan control and the unit will default to high speed fan for servicing. Reconnect wire after servicing.
C. HEATING MODE To check system operation during heating cycle, refer to the Tech Label on outdoor unit. This chart indicates 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.
Figure 16 Rating Plate (required) Subcooling Temperature °F (°C) oF oF oF Measured Liquid Pressure (psig) 8 10 12 251 259 266 274 283 291 299 308 317 326 335 345 364 374 384 395 406 416 427 439 450 462 474 76 78 80 82 84 86 88 90 92 94 96 98 428 01 5103 02 R-410A Required Liquid Line Temperature 74 72 76 74 78 76 80 78 82 80 84 82 86 84 88 86 90 88 92 90 94 92 96 94 98 ° F (°C) 70 72 74 76 78 80 82 84 86 88 90 92 96 98 17
SEQUENCE OF OPERATION A. COOLING MODE On a call for cooling, the thermostat makes circuits R-O, R-Y, and R-G. Circuit R-O energizes reversing valve, switching it to cooling position. Circuit R-Y energizes contactor, starting outdoor fan motor and compressor. Circuit R-G energizes indoor unit blower relay, starting indoor blower motor. When thermostat is satisfied, its contacts open, de-energizing contactor and blower relay. Compressor and motors stop.
Figure 18 Comfort Alert™ Status LED Status LED Description Green “POWER” | Module has power Red “TRIP” Diagnostics (some models) Status LED Troubleshooting Information Supply voltage is present at module terminals Thermostat demand signal | 1. Compressor protector is open Y1 is present, but the com- | 2. Outdoor unit power disconnect is open pressor is not running 3. Compressor circuit breaker or fuse(s) is open 4. Broken wire or connector is not making contact 5.
R-410A QUICK REFERENCE GUIDE R-410A refrigerant operates at 50% -— 70% higher pressures than R-22. replacement components are designed to operate with R-410A. Be sure that servicing equipment and R-410A refrigerant cylinders are rose colored. Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400. R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose.
