York PREDATOR DM090 Installation Manual

Also see for PREDATOR DM 090: Installation manual Technical guide Installation manual Technical guide Installation instruction

035-17311-003-A-0704Unitary Products Group 17THERMOSTAT WIRINGThe thermostat should be located on an inside wall approxi-mately 56 inches above the floor where it will not be subjectto drafts, sun exposure or heat from electrical fixtures orappliances. Follow the manufacturer's instructions enclosedwith thermostat for general installation procedure. Seven (7)color-coded, insulated wires should be used to connect thethermostat to the unit. Refer to Table 7 for control wire sizingand maximum length.POWER AND CONTROL WIRINGField wiring to the unit, fuses, and disconnects must conformto provisions of National Electrical Code (NEC), ANSI/NFPANo. 70 – Latest Edition (in U.S.A.), current Canadian Electri-cal Code C221, and/or local ordinances. The unit must beelectrically grounded in accordance with NEC and CEC asspecified above and/or local codes.Voltage tolerances which must be maintained at the com-pressor terminals during starting and running conditions areindicated on the unit Rating Plate and Table 1.The internal wiring harnesses furnished with this unit are anintegral part of the design certified unit. Field alteration tocomply with electrical codes should not be required. If any ofthe wire supplied with the unit must be replaced, replacementwire must be of the type shown on the wiring diagram and thesame minimum gauge as the replaced wire.A disconnect must be utilized for these units. Factoryinstalled disconnects are available. If installing a disconnect(field supplied or York International® supplied accessory),refer to Figure 4 for the recommended mounting location.NOTE: Since not all local codes allow the mounting of a dis-connect on the unit, please confirm compliance withlocal code before mounting a disconnect on the unit.Electrical line must be sized properly to carry the load. USECOPPER CONDUCTORS ONLY. Each unit must be wiredwith a separate branch circuit fed directly from the meterpanel and properly fused.Refer to Figures 17, 18 and 19 for typical field wiring and tothe appropriate unit wiring diagram mounted inside controldoors for control circuit and power wiring information.POWER WIRING DETAILUnits are factory wired for the voltage shown on the unitnameplate. Refer to Electrical Data Tables 8 through 13 sizepower wiring, fuses, and disconnect switch.Power wiring is brought into the unit through the side of theunit or the basepan inside the curb.TABLE 7: CONTROL WIRE SIZESWire Size Maximum Length**. From the unit to the thermostat and back to the unit.18 AWG 150 FeetAvoid damage to internal components if drillingholes for disconnect mounting.When connecting electrical power and control wiringto the unit, water-proof connectors must be used sothat water or moisture cannot be drawn into the unitduring normal operation. The above water-proofingconditions will also apply when installing a field sup-plied disconnect switch.