York Predator Z series Installation Instructions Manual

Contents

5370596-YIM-C-051854 Johnson Controls Ducted SystemsTerminal Thermostat connection strip on left edge of UCBW1 1st stage heating request, 24 VAC input switchedfrom R Not effective for cooling-only unitsW2 2nd stage heating request, 24 VAC input switchedfrom RNot effective for cooling-only units or units with single-stageheat sectionsY1 1st stage cooling request, 24 VAC input switchedfrom RY2 2nd stage cooling request, 24 VAC input switchedfrom RVisible in the display menu when the #ClgStgs parameter is setfor 2 or more, also effective for economizer free cooling supplyair temperature reset when the #ClgStgs parameter is set for 1or moreG Continuous indoor blower request, 24 VAC inputswitched from ROCC Occupancy request, 24 VAC input switched fromRMust have the OccMode parameter set for External to beeffectiveX Hard lockout indicator, 24 volt output to a lightthermostat LEDR 24 VAC hot for thermostat switching and powerIf field-added external accessories for unit shutdown are used,24 VAC hot return from smoke detector, condensate overflowand/or user shutdown relay switching in seriesSD-24If field-added external accessories for unitshutdown are used, 24 VAC hot out for smokedetector, condensate over- flow and/or usershutdown relay switching in seriesUnit wiring harness jumper plug for factory shutdownaccessories must be removed if the switching of field-addedexternal accessories for unit shutdown are wired betweenthermo- stat connection strip SD-24 and RC 24 VAC common for thermostat powerLEDs on left edge of UCBPOWER Green UCB power indicator Lit indicates 24 VAC is present at C and 24V terminalsFAULT Red hard lockout, networking error and firmwareerror indicator1/2 second on/off flashing indicates one or more alarm iscurrently active, 1/10th second on/off flashing indicates anetworking error (polarity, addressing, etc.) or a firmware error(likely correctable with re-loading from USB flash drive)SA BUS Green UCB SA bus communication transmissionindicatorLit/flickering indicates UCB SA bus communication is currentlyactive, off indicates the UCB is awaiting SA bus communicationTerminal Space temperature sensor connections at center on upper edge of UCBSTSpace Temperature sensor input from 10KΩ @77°F, Type III negative temperature coefficientthermistorPositive of VDC circuit (3.625 VDC reading to COM with opencircuit), effective if “Thermo- stat-only Control” parameter is setOFF, space sensor override momentary shorts ST to COM toinitiate/terminate temporary occupancyCOM Common for ST and SSO inputs Negative of VDC circuit for ST and SSO inputsSSO Space Sensor Offset input from 0 to 20KΩpotentiometerPositive of VDC circuit (3.625 VDC reading to COM with opencircuit), 10KΩ/2.5 VDC is 0°F offset, 0Ω/0 VDC is maximumabove offset and 20KΩ/3.4 VDC is maximum below offset fromactive space temperature setpointPin Temperature sensor connections at right on upper edge of UCBSAT+Supply Air Temperature sensor input from 10KΩ@ 77°F, Type III negative temperature coefficientthermistorInput required for operation; 3.625 VDC reading SAT+ to SAT–with open circuit. Used in heat/cool staging cutouts, free coolingoperation, demand ventilation operation, comfort ventilationoperation, economizer loading operation, VAV coolingoperation, hydronic heat operation.Table 29: Smart Equipment™ UCB Details (Continued)Description Function & Comments