York ZF180 Installation Manual

Also see for ZF 180 Series: Technical guide Installation manual Instruction manual Technical guide Installation manual

Contents

5168276-XIM-B-0216Johnson Controls Unitary Products 47Figure 31: Unit Control BoardW1W2Y1GY2OCCCSD-24THERMOSTATWIRED HERE{ RXTable 30: Simplicity SE UCB DetailsDescription Function & CommentsTerminal Directional orientation: viewed with silkscreen labels uprightLimit, 24 VAC power and shutdown connections from unit wiring harness at left on upper edge of UCBLIMIT Monitored 24 VAC input through heat section limitswitch(es)If voltage is absent, indicating the heat section is over-temperature, the UCB will bring on the indoor blowerC 24 VAC, 75 VA transformer Common referencedto cabinet groundConnects through circuit traces to thermostat connection strip Cand indoor blower VFD pin C24V 24 VAC, 75 VA transformer hot Powers the UCB microprocessor, connects through circuit traceto the SD 24 terminalSD 2424 VAC hot out for factory accessory smokedetector, condensate overflow and/or usershutdown relay switching in seriesConnects through circuit trace to thermostat connection stripSD-24. A wiring harness jumper plug connecting SD 24 to SD Ris in place if factory accessories for unit shutdown are not used -this jumper plug must be removed if the switching of field-addedexternal accessories for unit shutdown are wired betweenthermostat connection strip SD-24 and RSD R24 VAC hot return from factory accessory smokedetector, condensate overflow and user shutdownrelay switching in seriesConnects through circuit trace to the R terminal on the upper leftof the boardR 24 VAC hot for switched inputs to the UCBConnects through circuit trace to the thermostat connectionstrip R terminal, right FAN OVR pin, right HPS1 pin, right HPS2pin, lower DFS pin and lower APS pin