Carrier 40GRQ Installation Instruction

Also see for 38GRQ: Owner's manual Owner's manual

Contents

9INSTALL ALL POWER, INTERCONNECTINGWIRING, AND PIPING TO INDOOR UNIT1. Run interconnecting piping and wiring from outdoor unit toindoor unit.2. Pass interconnecting cable through hole in wall (outside toinside).3. Lift indoor unit into position and route piping and drainthrough hole in wall (inside to outside). Fit interconnectingwiring into back side of indoor unit.4. Hang indoor unit on upper hooks of wall mounting plate (asshown in Fig. 14 and Fig. 17).A08283Fig. 14 - Hanging Indoor Unit5. Open front cover of indoor unit and remove field wiring ter-minal block cover (see Fig. 15).Field WiringCoverInterconnectingCableA08279Fig. 15 - Field Wiring Cover6. Pull interconnecting wire up from back of indoor unit andposition in close to the terminal block on indoor unit.7. Push bottom of indoor unit onto mounting plate tocomplete wall mount.8. Connect wiring from outdoor unit per connection diagram(see Fig. 23).NOTE: Polarity of power wires must match originalconnection on outdoor unit.9. Replace field wiring cover and close front cover of indoorunit.10. Connect refrigerant piping and drain line outside of indoorunit. Refer to Fig. 11 for proper installation of flareconnections. Complete pipe insulation at flare connectionthen fasten piping and wiring to the wall as required.Completely seal the hole in the wall.Fig. 16 - Remove KnockoutsMountingplateFixing hook MountingplateA12408Fig. 17 - Hang Indoor UnitUNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Never use the system compressor as a vacuum pump.CAUTION!Refrigerant tubes and indoor coil should be evacuated using therecommended deep vacuum method of 500 microns. The alternatetriple evacuation method may be used if the procedure outlinedbelow is followed. Always break a vacuum with dry nitrogen.SYSTEM VACUUM AND CHARGEUsing Vacuum Pump1. Completely tighten flare nuts A, B, C, D, connect manifoldgage charge hose to a charge port of the low side servicevalve. (See Fig. 18.)2. Connect charge hose to vacuum pump.3. Fully open the low side of manifold gage. (See Fig. 19)4. Start vacuum pump5. Evacuate using either deep vacuum or triple evacuationmethod.6. After evacuation is complete, fully close the low side ofmanifold gage and stop operation of vacuum pump.7. The factory charge contained in the outdoor unit is good forup to 25 ft. (8 m) of line length. For refrigerant lines longerthan 25 ft (8 m), add 0.2 oz. per foot of extra piping up tothe maximum allowable length.8. Disconnect charge hose from charge connection of the lowside service valve.9. Fully open service valves B and A.10. Securely tighten caps of service valves.