Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 903Catalog No. 533-037Printed in U.S.A.Form 30HX-3WPg 14-00Replaces: NewBook 2Tab5cWiring DiagramsDIAGRAM INDEXNOTE: For operating sequence, refer to Controls, Start-Up, Operation, Service, and Troubleshooting literature.POWER SCHEMATICSUnit 30HXA,CVoltageFigure NumberLabel DiagramNo. 30HX076-186ALL1502347206-271ALL2502349CONTROL SCHEMATICSUnit 30HXA,CVoltageFigure NumberLabel DiagramNo. 30HX076-27124 (Low Voltage)3502503244502504115, 2305502556502557COMPONENT ARRANGEMENTSUnit 30HXA,CVoltageFigure NumberLabel DiagramNo. 30HX076-186ALL6502301206-271ALL750235630HXA, 30HXCSizes 076-271Condenserless and Fluid-Cooled Chillerswith ComfortLink™ Controls50/60 Hz2LEGENDALM—AlarmC—Contactor, CompressorCB—Circuit BreakerCCP—ComfortLink™ Compressor ProtectionCFR—Condenser Fan RelayCNFS—Condenser Flow SwitchCNP—Condenser PumpCNPI—Condenser Pump InterlockCOMP—CompressorCWFS—Chilled Water Flow SwitchCWP—Chilled Water PumpCWPI—Chilled Water Pump InterlockDGT—Discharge Gas ThermistorDPT—Discharge Pressure TransducerEMM—Energy ManagementEPT—Economizer Pressure TransducerEQUIP—EquipmentEWT—Entering WaterEXV—Electronic Expansion ValveFU—FuseGND—GroundHTR—HeaterHPS—High-Pressure SwitchLWT—Leaving WaterLDR—LoaderLL—Liquid LevelMBB—Main Base BoardMLV—Minimum Load ValveOAT—Outdoor-Air ThermistorOLS—Oil Level SwitchOPC—Oil Pump ContactorOPT—Oil Pressure TransducerPL—Plug AssemblyS—ShortingSCB—Screw Compressor BoardSEC—SecondarySN—Sensor (Toroid)SPT—Suction Pressure TransducerSW—SwitchT—ThermistorTB—Terminal BlockTEMP—TemperatureTRAN—TransformerXL—Across-the-Line1W—Wye2W—DeltaTerminal Block ConnectionMarked TerminalUnmarked TerminalUnmarked SpliceMarked WireMarked SpliceFa...
