York TPLCC Installation Manual

York TPLCC Installation Manual Manual pdf 13 page image

987158-UIM-B-1013Johnson Controls Unitary Products 13CONTROL WIRING USING COMMUNICATINGCONTROLSUse the wiring diagram below to connect the furnace control, Communi-cating Control (wall thermostat) and communicating outdoor unit. Besure that all of the “A” terminals are connected together, all of the “B”terminals are connected together, all of the “C” terminals are connectedtogether and all of the “R” terminals are connected together. See Figure19. When using a fully communicating system, the large screw termi-nals (C, G, R, etc.) on the furnace control are not used. The four smallscrew terminals in the terminal block on the end of the furnace controlshould be used.When connecting the Communicating Control (wall thermostat) and fur-nace control to a non-communicating outdoor A/C or heat pump, usethe wiring diagram in Figure 20. The thermostat and furnace will be con-nected exactly as shown above, but the conventional 24 volt R, C andY/Y2 terminals will be used to control the outdoor unit.CONVENTIONAL LOW VOLTAGE CONTROL WIRINGCONNECTIONSInstall the field-supplied thermostat by following the instructions thatcome with the thermostat. With the thermostat set in the OFF positionand the main electrical source disconnected, connect the thermostatwiring from the wiring connections on the thermostat to the terminalboard on the ignition module, as shown in Figures 21-26, ThermostatCharts. Electronic thermostats may require the common wire to be con-nected as shown in Figures 22 - 26. Apply strain relief to thermostatwires passing through cabinet.The 24-volt, 40 VA transformer is sized for the furnace componentsonly, and should not be connected to power auxiliary devices such ashumidifiers, air cleaners, etc. The transformer may provide power for anair conditioning unit contactor.AIR CONDITIONER CONNECTIONSThis furnace may be used with single-stage or two-stage air condition-ing units.For Single-Stage A/C - Connect the low voltage wiring as shown inFigure 21, Thermostat Chart.For Two-Stage A/C - Use a two-stage thermostat, connect the low volt-age wiring as shown in Figure 22, Thermostat Chart.For Two-Stage A/C using a Single-Stage Thermostat - connect thelow voltage wiring as shown in Figure 23, Thermostat Chart.This furnace control board can control a two-stage A/C using only a sin-gle-stage thermostat. In this case, the furnace control switches betweenhigh cool and low cool based on the calculated cooling load.FIGURE 19: Modulating Furnace with Communicating AC or HPFIGURE 20: Modulating Furnace with Communicating Thermostat andnon-Communicating ACA+RCB-A+RCB-A+RGNDB-LOCOMPHICOMPODHUMY1Y/Y2WRGCTouch ScreenCommunicating controlModulating FurnaceCommunicating controlAir Conditioner/Heat PumpCommunicating controlA+RCB-A+RB-LOCOMPHICOMPODHUMY1Y/Y2WRGCTouch ScreenCommunicating controlModulating FurnaceCommunicating controlNon-Air ConditionerCommunicatingYY2RCCSet the heat anticipator in the room thermostat to 0.1 amps. Setting itlower will cause short cycles. Setting it higher will cause the roomtemperature to exceed the set points.Some electronic thermostats do not have adjustable heat anticipa-tors. They should be set to six cycles per hour. Follow the thermostatmanufacturer's instructions.