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1To Humidifier LeadsTo HUM Terminal OnFurnace Control Board24 VCoilTo Humidifier LeadsTo Com/24V Screw Terminalon Thermostat StripFig. 33 - Field -supplied Isolation Relay for Humidifiers with Internal Power SupplyA1115759TP5ABLKBLKFIVEWIRETHREE-WIREHEATING-ONLYW2NOTE 2W C Y R G1-STAGETHERMOSTATTERMINALSFIELD 24-VOLT WIRINGFIELD 115-, 208/230-, 460-VOLT WIRINGFACTORY 24-VOLT WIRINGFACTORY 115-VOLT WIRINGFIELD-SUPPLIEDFUSED DISCONNECT208/230- OR460-VOLTTHREEPHASEWHTGNDWHT115-VOLT FIELD-SUPPLIEDFUSEDDISCONNECTCOMW/W1Y/Y2JUNCTIONBOXRCONTROLBOX G24-VOLTTERMINALBLOCKFURNACENOTE 1CONDENSINGUNITNOTES: 1. Connect Y/Y2-terminal as shown for proper operation.2. Some thermostats require a "C" terminal connection as shown.3. If any of the original wire, as supplied, must be replaced, usesame type or equivalent wire.Fig. 34 - Typical Two -Stage Field Wiring DiagramGND208/230-VOLTSINGLEPHASEA95236SET UP SWITCHESLOW HEAT ONLYAND BLOWEROFF-DELAY24-V THERMOSTATTERMINALSW2 Y DHUM G COM W/W1 Y/Y2 R24VLHTOFFDLYTEST / TWINHUM1 2 3ONOFFPLTTWINNING AND/ORCOMPONENT TESTTERMINALACRDJ - AIR CONDITIONINGRELAY DISABLE JUMPERHUMIDIFIER TERMINAL(24 VAC 0.5 AMPS MAX)TRANSFORMER24 VAC CONNECTIONS3-AMP FUSELED OPERATION& DIAGNOSTIC LIGHTFUSE 3-AMPSEC-2COMSEC-124VACPL1PL1-LOW VO LTAGEMAIN HARNESS CONNECTORBLOWER SPEEDTERMINALSCOMHI HTCOOLLO HTSPARE 2SPARE 124V MTR TAPS1EAC TERMINAL115 VAC 1.0 AMP MAXEAC-2115 VACBLOWER POWER (BL1)CONNECTION115 VACTRANSFORMERPRIMARYPL2 - HOT SURFACEIGNITER/INDUCERMOTOR CONNECTION115-VAC (L2)NEUTRALCONNECTIONSL2EAC-1L1 BL-1 PR-1IDRPL2HSIRIDMHSI HI LOIHI/LOR115 VAC LINE (L1)INPUTFig. 35 - Two -Stage Furnace ControlA1115034