Carrier SINGLE PACKAGE ROOFTOP 48HC Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

20FIRE HAZARDFailure to follow this warning could result inintermittent operation or unsatisfactory performance.Do not connect aluminum wire between disconnectswitch and air conditioning unit. Use only copperwire. (See Fig. 24.)! WARNINGCOPPERWIRE ONLYELECTRICDISCONNECTSWITCHALUMINUMWIREA93033Fig. 24 -- Disconnect Switch and UnitUnits without Factory--Installed Disconnect —When installing units, provide a disconnect switch perNEC (National Electrical Code) of adequate size.Disconnect sizing data is provided on the unit informativeplate. Locate on unit cabinet or within sight of the unit pernational or local codes. Do not cover unit informativeplate if mounting the disconnect on the unit cabinet.Units with Factory--Installed Disconnect —The factory--installed option disconnect switch is locatedin the main control box. The manual switch handle isaccessible on the corner post adjacent to the control boxaccess panel.All Units --All field wiring must comply with NEC and all local coderequirements.Size wire based on MCA (Minimum Circuit Amps) on theunit informative plate. See Fig. 25 for power wiringconnections to the unit power terminal block and equipmentground. Maximum wire size is 2/0 AWG per pole.Provide a ground--fault and short--circuit over--currentprotection device (fuse or breaker) per NEC Article 440(or local codes). Refer to unit informative data plate forMOCP (Maximum Over--current Protection) device size.Voltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate. SeeTable 11. On 3--phase units, voltages between phases mustbe balanced within 2% and the current within 10%. Usethe formula shown in the legend for Table 11 (see Note 2on page 49) to determine the percent of voltageimbalance.UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage.Operation on improper line voltage or excessive phaseimbalance constitutes abuse and may cause damage toelectrical components. Such operation would invalidateany applicable Carrier warranty.CAUTION!11 12 13L1 L2 L3TB1208/230-3-60460-3-60575-3-60Units Without Disconnect OptionUnits With Disconnect OptionT1 T2 T3L1 L2 L3L1 L2 L3FactoryWiringDisconnectperNECOptionalDisconnectSwitchC101000Fig. 25 -- Power Wiring ConnectionsConvenience Outlets —ELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Units with convenience outlet circuits may usemultiple disconnects. Check convenience outlet forpower status before opening unit for service. Locateits disconnect switch, if appropriate, and open it.Lock--out and tag--out this switch, if necessary.! WARNING48HC