Humidity and CO2 Sensors | Trane Tracer Unit Ventilator, ZN.520

Installation and Wiring

Humidity and CO2 Sensors

Humidity and CO2 sensors should be mounted in a similar location as the zone sensor.

Figure 14: Relative humidity sensor

Figure 15: CO 2 Sensor

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Trane Tracer Unit Ventilator, ZN.520 manual Humidity and CO2 Sensors

Contents

Tracer ZN.520 for Classroom Unit Ventilator Installation Owner Diagnostics Installation of New Units Start-up Procedures Power Up Sequence Tracer ZN.520 Overview General Information General Information Tracer ZN.520 unit controller circuit board Controller Circuit Board Features Typical Components Controller FeaturesService Integrated Comfort System Communication ConfigurationsPeer-to-Peer Communications Interoperability Stand-AloneCommunication Interface Description End Device SpecificationsCharacteristic Standard End Devices Standard End Devices Way Control Valve Time clock Zone sensor Dpdt Control Transformer Specifications Installation and Wiring Binary Inputs Generic/baseboard Heat Binary Output Binary Outputs Analog inputs Analog Inputs Mounting Vertical classroom unit ventilator end pocket Power Wiring Proper zone sensor placement Installing the Wall- Mounted Zone Sensor Optional Humidity and CO2 Sensors Typical Wiring Diagram-Wall Mounted Zone Sensor Typical Wiring Diagram-Unit Mounted Zone Sensor Typical Wiring Diagram-Unit Input and output summary Input/Output Summary Input/Output Summary Heating source ConfigurationConfigurable parameters Cooling source Binary Outputs1 Analog input summary Binary input summary ConfigurationBinary Inputs1 Analog Inputs1 Default Fan ConfigurationEnd Device Configurations Fan configuration ranges Discharge Air Limits Setpoint defaults Default Valid rangeDischarge air limit ranges Default Valid range Setpoints Maintenance Timers Occupied Bypass TimerPower-Up Control Wait Winking Location IdentifierUnit Identification Tag Occupancy Power-UpUnit Operation Heating And Cooling Changeover Logic Heat/Cool Changeover logic Fan Operation Fan Off DelayCooling Operation Heating Operation Modulating Valves Valve OperationFace-and-Bypass Damper Operation Exhaust fan/damper operation Temperature Assumed1 Entering Water Temperature SamplingWater assumption chart Unit Configuration Baseboard Heat Operation Economizer OperationDX Operation Electric Heat Operation Other Modes Filter Status/ Maintenance TimerOutput Overrides Fan Status Simple data sharing application Data Sharing-LonWorks More complex data sharing application Heating And Cooling Changeover Logic Heat/Cool Changeover logic Cooling Operation Valve Operation Entering Water Temperature Sampling Economizer Operation Output Overrides Data Sharing-LonWorks More complex data sharing application Yellow Comm LED TroubleshootingRed Service LED Black Service Push Button Exit6 Test Procedure Troubleshooting Outdoor Air Temperature Failure Space Temperature FailureEntering Water Temperature Failure Discharge Air Temperature Limit Diagnostics Troubleshooting Translating Multiple Diagnostics Fans Rover service tool Valves stay open Probable cause Possible Explanation ValvesValves stay closed Probable cause Possible Explanation Outdoor air damper stays closed Probable cause Explanation DX/Electric HeatOutside Air Damper Probable Cause Explanation Outdoor air damper stays open Replacing Circuit Boards Tracer ZN.520 Unit Controller Replacement Appendix Hardwired Setpoint AdjustmentFan Switch Resistance Values Hardwired Thermistor Values Function Appendix-Binary ConfigurationBinary Configuration Binary configuration details Binary input or output Unit Operation Based On The Effective HEAT/COOL Output Heat/cool mode input NviHeatCoolEffective heat/ cool mode output nvoHeatCool Appendix-Unit Operation Appendix-Unit Operation Input/output listing1 Configuration properties1Appendix-Data Lists Data Lists Set the Program Setting the Time ClockAppendix-Timeclock Set the Time and Day Override Program Manual Operation Review and Change Programs Appendix-Timeclock Appendix-Location Identifier Location Identifier Location Identifier Location Identifier Trane Company