Remove the nesting brackets from the four corners on top ofthe unit. All screws that are removed to take these brackets offmust be replaced on the unit.CLEARANCESAll units require certain minimum clearances for proper opera-tion and service. Refer to Figure 4 for these clearances.WARNING: Do not permit overhanging structures or shrubs toobstruct condenser air discharge.Additional height may be required for snow clearance if winteroperation is expected.POWER AND CONTROL WIRINGInstall electrical wiring in accordance with the latest NationalElectrical Code (NFPA Standard No. 70) and/or local regula-tions. The unit should be grounded in accordance with thesecodes.POWER WIRINGCheck the voltage of the power supply against the data on theunit nameplate. Check the size of the power wire, the discon-nect switch and the fuses against the data on Table 3.NOTE: Copper conductors must be installed between thedisconnect switch and the unit.Refer to Figure 4 for the location of the power wire accessopening through the front of the unit. This opening will requirea field-supplied conduit fitting.The field-supplied disconnect switch must be suitable for anoutdoor location. Although it should be installed near the unit,do NOT secure it to the unit cabinet.Refer to Figure 3 for typical field wiring.CONTROL WIRINGRefer to Figure 4 for the location of the control wire accessopening through the front of the unit.Route the necessary low voltage control wires (18 AWG min.)from the TB1 terminal block inside of the unit control boxthrough this access opening to the room thermostat and to theevaporator blower motor controller.The room thermostat should be located on an inside wallapproximately 56" above the floor where it will not be subjectto drafts, sun exposure or heat from electrical fixtures orappliances. Follow manufacturer’s instructions enclosed withthermostat for general installation procedure.Refer to Figure 3 for typical field wiring.COMPRESSOR CRANKCASE HEATERThe compressor is equipped with a crankcase heater to preventrefrigerant from mixing with crankcase oil during the “OFF”cycle. The heater will be energized when the compressor is notrunning providing the unit disconnect switch is closed.CAUTION: Do not attempt to start the compressor without atleast eight hours of crankcase heat or compressordamage can occur.If a unit has just been installed or the unit disconnect switch hasbeen open for a long period of time, move the system switchon the room thermostat to the “OFF” position before closing theunit disconnect switch. Up to eight hours of crankcase heat canbe required to drive the liquid refrigerant out of the compressorbefore the compressor can be started.SPREADERBARLIFTINGHOLESWARNINGBEFORE LIFTING UNIT,MAKE SURE THAT ITSWEIGHT IS DISTRIB-UTED EQUALLY ON THECABLES SO THAT ITWILL LIFT EVENLY.FIG. 2 - TYPICAL RIGGINGModelSize(Mbh)Compressor1 Condenser Unit Weight(Lbs.)Charge,(Refrigerant-22)Lbs.-Oz.24" Fan (Propeller) Fan Motor 2 CoilRating(Tons)Cap.(Stg’s.) Qty.Blades/Pitch(Deg.)Nom.CFM Qty. HP RPM RotationFinsperinchRowsDeep Ship. Oper. Holding3 Oper.4180 15 2 2 3/32 10,800 2 1 1100 CCWLE 20 2 920 930 1 - 0 24 - 12240 20 2 2 3/32 11,300 2 1 1100 CCWLE 20 2 970 990 1 - 0 32 - 131Compressor set consists of two Copeland scroll compressors manifolded into a single refrigerant circuit.2 The ball bearing, 48 frame, single phase condenser fan motor have internal protection are directly connected to the condenser fans.Motor rotation is counterclockwise when viewing the lead end,which is opposite the shaft end.3 Holding charge is the amount in the unit as shipped from the factory.4 Operating refrigerant charge is for the condensing unit and the matching York air handler, but does not include the charge in the interconnecting piping.See the Refrigerant Line Charge Table to determine the additional refrigerant charge required for interconnecting piping.TABLE 2 - PHYSICAL DATA550.23-N6Y4 Unitary Products Group