Page 2 - Unpack Unit; CAUTION
2 428 01 5107 05 Specifications subject to change without notice. When outdoor unit is connected to factory–approved indoor unit,outdoor unit contains system refrigerant charge for operation with AHRI rated indoor unit when connected by 15 ft. (4.57 m) offield–supplied or factory accessory tubing. F...
Page 3 - FEEDER TUBE; Fig. 3 – Defrost Thermostat Location; Make Piping Connections; WARNING; PERSONAL INJURY AND ENVIRONMENTAL; UNIT DAMAGE HAZARD; Residential Piping and Long Line; Outdoor Unit Connected To Factory Approved Indoor
428 01 5107 05 3 Specifications subject to change without notice. FEEDER TUBE DEFROST THERMOSTAT STUB TUBE A97517 Fig. 3 – Defrost Thermostat Location Table 1 – Accessory Usage Accessory REQUIRED FOR LOW–AMBIENT COOLING APPLICATIONS (Below 55 F / 12.8 C) REQUIRED FOR LONG LINE APPLICATIONS* REQU...
Page 4 - VALVE CORE; Brazing Connections; Installing with Indoor Piston
4 428 01 5107 05 Specifications subject to change without notice. 3. Find plastic bag taped to unit containing copper adapter tube, brass nut, and plastic washer. 4. Install plastic washer in the seat inside piston body.5. Fit brass nut onto adapter tube and install tube onto liquid service valve. T...
Page 5 - Install Liquid Line Filter Drier Indoor; Evacuate Refrigerant Tubing and Indoor Coil; Deep Vacuum Method; Final Tubing Check; Make Electrical Connections; Route Ground and Power Wires
428 01 5107 05 5 Specifications subject to change without notice. Install Liquid Line Filter Drier Indoor Refer to Fig. 7 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.3. Braze filter drier to 5 in. (127 mm) long liqu...
Page 6 - Connect Control Wiring; LEGEND; Final Wiring Check; Compressor Crankcase Heater
6 428 01 5107 05 Specifications subject to change without notice. Connect ground wire to ground connection in control box forsafety. Connect power wiring to contactor as shown in Fig. 9. DISCONNECTPER N.E.C. AND/ORLOCAL CODES CONTACTOR GROUNDLUG FIELD GROUND WIRING FIELD POWER WIRING BLUE 3 PHASE ON...
Page 7 - ENVIRONMENTAL HAZARD; UNIT OPERATION AND SAFETY HAZARD; Follow these steps to properly start up system:; Cooling; Heating; NOTE
428 01 5107 05 7 Specifications subject to change without notice. CAUTION ! ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage.Federal regulations require that you do not vent refrigerant to the atmosphere. Recover during system repair or final unit disposal. CAUT...
Page 8 - Fig. 12 – Defrost Control; Check Charge; Units with Cooling Mode TXV
8 428 01 5107 05 Specifications subject to change without notice. OUTDOOR FAN RELAY Y OUTPUT TO PRESSURE SWITCHES AND CONTACTOR THERMOSTAT INPUTS T1 - ENABLES DEFROST TIMER.MUST BE ENERGIZED FOR DEFROST TIMER TO START C - COMMON O - REVERSING VALVE SPEEDUP DEFROST THERMOSTAT MUST BE CLOSED BEFORE DE...
Page 9 - Units with Indoor Pistons; Table 5 – Additional Subcooling Required -
428 01 5107 05 9 Specifications subject to change without notice. Units with Indoor Pistons Units installed with indoor pistons require charging by the superheat method.The following procedure is valid when indoor airflow is within 21 percent of its rated CFM. 1. Operate unit a minimum of 10 minut...
Page 10 - Table 6 – Additional Subcooling Required -
10 428 01 5107 05 Specifications subject to change without notice. Table 6 – Additional Subcooling Required - WCH4- B Subcooling Delta from Rating Plate Value Outdoor Unit Tonnage Indoor Unit | Additional Subcooling Required 18 24 30 36 42 48 60 WLA*184AA* - WLA*244AA* - WLA*304AA* - WLA*364AA* - WL...
Page 11 - Table 7 – Additional Subcooling Required -
428 01 5107 05 11 Specifications subject to change without notice. Table 7 – Additional Subcooling Required - NXH5 - Subcooling Delta from Rating Plate Value OUTDOOR UNIT TONNAGE Indoor Models 18 24 30 36 42 48 60 ED*4X18B**/EA*4X18*14A* -- EN(A,D)4X18*14** -- FEM4(P,X)18**A*+TXV -- F(E,S)A4X18**A* ...
Page 12 - Table 8 – Required Liquid Line Temperatures; Table 9 – Superheat Charging (Heat Pump Only); Table 10 – Required Suction–Line Temperature
12 428 01 5107 05 Specifications subject to change without notice. Table 8 – Required Liquid Line Temperatures _ F LIQUID PRESSURE AT SERVICE VALVE (PSIG) REQUIRED SUBCOOLING TEMPERATURE (° F) 8 10 12 14 16 18 251 76 74 72 70 68 66 259 78 76 74 72 70 68 266 80 78 76 74 72 70 274 82 80 78 76 74 72 28...
Page 13 - FINAL CHECKS; IMPORTANT; CARE AND MAINTENANCE; R- 410A REFRIGERANT QUICK REFERENCE GUIDE
428 01 5107 05 13 Specifications subject to change without notice. FINAL CHECKS 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 sec...