York ZT078-102 Installation Manual

Also see for ZT SERIES: Technical guide

6021980-UIM-A-1120Johnson Controls Ducted Systems 45HC COM 24 VAC common/0-10 VDC negative for thesupply air humidity sensor Connects through circuit trace to 24V~ IN pin COMR 24V~ 24 VAC hot supplied for the indoor air qualitysensor Connects through circuit trace to 24V~ IN pin HOTIN5 IAQ 0-10 VDC positive input from the Indoor AirQuality sensorIAQRange parameter sets the CO2 parts per million measuredby the indoor air quality sensor when it outputs 10 VDC; IAQparameter reports input status (0-5000ppm). Used for demandventilation functions if the NetIAQ parameter indicates ?Unrel.C COM 24 VAC common/0-10 VDC negative for theindoor air quality sensor Connects through circuit trace to 24V~ IN pin COMR 24V~ 24 VAC hot supplied for the outdoor air qualitysensor Connects through circuit trace to 24V~ IN pin HOTIN6 OAQ 0-10 VDC positive input from the Outdoor AirQuality sensorOAQRange parameter sets the CO2 parts per million measuredby the outdoor air quality sensor when it outputs 10 VDC; OAQparameter reports input status (0-5000ppm). Used for demandventilation function when DVent-Mode selection is Diff betweenIAQ and OAQ and the NetOAQ parameter indicates ?Unrel.C COM 24 VAC common/0-10 VDC negative for theoutdoor air quality sensor Connects through circuit trace to 24V~ IN pin COMR 24V~ 24 VAC hot supplied for the air monitoringstation sensor Connects through circuit trace to 24V~ IN pin HOTIN7 FR AIR 0-10 VDC positive input from the air monitoringstation sensorMOA-Range parameter sets the cubic feet per minute/liters persecond measured by the air monitoring station sensor when itoutputs 10 VDC; Fr Air parameter reports input status (0-50000CFM/23595lps). Used for economizer minimum positionreset in speed-controlled indoor blower applications.C COM 24 VAC common/0-10 VDC negative for the airmonitoring station sensor Connects through circuit trace to 24V~ IN pin COMR 24V~ 24 VAC hot supplied for the building pressuresensor Connects through circuit trace to 24V~ IN pin HOTIN8 BLDGPRES0-5 VDC positive input from the BuildingPressure sensorBldgPres parameter reports input status (-.250-.250”/w/-.062-.062kPa). Used for modulating power exhaust functions whenExFType selection is Modulating Damper or Variable FrequencyFan.C COM 24 VAC common/0-5 VDC negative for thebuilding pressure sensor Connects through circuit trace to 24V~ IN pin COMSmart Equipment™ economizer board - analog inputs (Continued)Location BoardlabelCoverlabel Description Function and commentsSmart Equipment™ economizer board - LED detailsLocation BoardlabelCoverlabel Description Function and commentsBPOWER POWER Green UCB power indicator Lit indicates 24 VAC is present at 24V~ IN COM and HOT pinsFAULT FAULT Red networking error and firmware errorindicator1/10th second on/off flashing indicates a networking error(polarity, addressing, etc.) or a firmware error (likely correctablewith re-loading from USB flash drive)SA BUS SA BUS Green UCB SA bus communicationtransmission indicatorLit/flickering indicates UCB-to-economizer board SA buscommunication is currently active, off indicates the economizerboard is awaiting SA bus communication