Carrier 38MGQ Installation Instructions Manual

Also see for 38MGQ Series: Service manual Installation instructions

Carrier 38MGQ Installation Instructions Manual Manual pdf 5 page image

5CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.S Wires should be sized based on NEC and local codes.S Use copper conductors only with a minimum 600 volt .rating and 2/64--inch thick insulation.CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipment damageor improper operation.S Be sure to comply with local codes while running wire fromindoor unit to outdoor unit.S Every wire must be connected firmly. Loose wiring maycause terminal to overheat or result in unit malfunction. Afire hazard may also exist. Therefore, be sure all wiring istightly connected.S No wire should be allowed to touch refrigerant tubing,compressor or any moving parts.S Disconnecting means must be provided and shall be locatedwithin sight and readily accessible from the air conditioner.S Connecting cable with conduit shall be routed through holein the conduit panel.All wires must be sized per NEC (National Electrical Code) orCEC (Canadian Electrical Code) and local codes. Use theElectrical Data table MCA (minimum circuit amps) and MOCP(maximum over current protection) to correctly size the wires andthe disconnect fuse or breakers respectively.Per the caution note, use only copper conductors with a minimum600 volt rating and 2/64--inch thick insulation. The use of BXcable is not recommended.Recommended Connection Method for Power andCommunication --Wiring -- Power and Communication Wiring:The main power is supplied to the outdoor unit. The field supplied14/3 power/communication wiring from the outdoor unit to indoorunit consists of four (4) wires and provides the power for theindoor unit. Two wires are high voltage AC power; one iscommunication wiring and the other is a ground wire.Recommended Connection Method for Power andCommunication Wiring (To minimize communication wiringinterference)Power Wiring:The main power is supplied to the outdoor unit. The field suppliedpower wiring from the outdoor unit to the indoor unit consists of three(3) wires and provides the power for the indoor unit. Two wires arehigh voltage AC power and one is a ground wire. To minimize avoltage drop, the factory recommended wire size is 14/2 stranded witha ground.Communication Wiring:A separate shielded copper conductor only, with a minimum 600volt rating and 2/64--inch thick insulation, must be used as thecommunication wire from the outdoor unit to the indoor unit.Please use a separate shielded 16GA stranded control wire.