Carrier 40MAQ Installation Instructions Manual

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Contents

Carrier 40MAQ Installation Instructions Manual Manual pdf 4 page image

4SYSTEM REQUIREMENTSAllow sufficient space for airflow and unit service. See Fig. 6 for the minimum required distances between the unit and walls or ceilings.PipingIMPORTANT: Both refrigerant lines must be insulated separately. Table 3 lists the pipe sizes for the indoor unit. Refer to the outdoor unit’s installation instructions for other allowed piping lengths andrefrigerant information.Table 3—Indoor Unit Pipe SizesUNIT SIZE 9K(115V)12K(115V)9K(208/230V)12K(208/230V)18K(208/230V)24K(208/230V)30K(208/230V)36K(208/230V)Gas Pipe in 3/8 1/2 3/8 1/2 1/2 5/8 5/8 5/8(mm) 9.52 12.7 9.52 12.7 12.7 16 16 16Liquid Pipe in 1/4 1/4 1/4 1/4 1/4 3/8 3/8 3/8(mm) 6.35 6.35 6.35 6.35 6.35 9.52 9.52 9.52WIRINGAll wires must be sized per NEC (National Electrical Code) orCEC (Canadian Electrical Code) and local codes. Use ElectricalData table MCA (minimum circuit amps) and MOCP (maximumover current protection) to correctly size the wires and thedisconnect fuse or breakers respectively.Per the caution note, only stranded copper conductors with a 600volt insulation rating wire must be used.Recommended Connection Method for Power andCommunication Wiring:The main power is supplied to the outdoor unit. The field supplied14/3 stranded wire with ground with a 600 volt insulation rating,power/communication wiring from the outdoor unit to indoor unitconsists of four (4) wires and provides the power for the indoorunit. Two wires are line voltage AC power, one is communicationwiring (S) and the other is a ground wire. Wiring between indoorand outdoor unit is polarity sensitive. The use of BX wire is NOTrecommended.If installed in a high Electromagnetic field (EMF) area andcommunication issues exists, a 14/2 stranded shielded wire can beused to replace L2/N and (S) between outdoor unit and indoor unitlanding the shield onto ground in the outdoor unit only.CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Wires should be sized based on NEC or CEC and localcodes.Use copper conductors only with a 600 volt insulationrating wire.CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipment damageor improper operation.Be sure to comply with local codes while running wire fromthe indoor unit to the outdoor unit.Every wire must be connected firmly. Loose wiring may causethe terminal to overheat or result in unit malfunction. A firehazard may also exist. Ensure all wiring is tightly connected.No wire should touch the refrigerant tubing, compressor orany moving parts.Disconnecting means must be provided and shall be locatedwithin sight and readily accessible from the air conditioner.Connecting cable with conduit shall be routed through thehole in the conduit panel.