General Information, Tracer ZN.520 Overview | Trane guide

General Information

Tracer® ZN.520

Overview

The Trane® Tracer® ZN.520 con- troller is a factory-installed and commissioned, direct-digital controller (DDC) offering for classroom unit ventilator sys- tems. (See Figure 1: “Tracer ZN.520 Control Board”) The Trac- er ZN.520 can also be applied to other Trane® interoperable HVAC equipment, including the fan coil and blower coil products. (For

more information see,Table 1: Tracer™ ZN.520 Unit Controller features and coil availability, on

page 8 for more information.) For more information regarding the application of the Tracer ZN.520 to other Trane products, contact the appropriate local Trane sales office.

Trane offers a complete solution to space comfort control with the flexibility of Integrated Comfort System (ICS) and stand-alone control packages. The ICS control package combines HVAC equip- ment and building management into one environmental comfort system.

Integrating the Tracer ZN.520 on classroom unit ventilators, and tying them to a Tracer Summit® system will provide a complete building management system. The stand-alone control package offers the features and function- ality of the direct digital control without a front-end building au- tomation system, while providing future considerations for ICS.

Equipment problems can often be diagnosed on each unit without having to access the unit compo- nets. These diagnostics can be re- ceived remotely via a modem with

aTracer Summit building automa- tion system, thus reducing the number of actual on-site service calls; through the Rover® service tool connected to a communica- tion jack located inside the Trace zone sensor; or connected to the unit.

Figure 1: Tracer ZN.520 Control Board

The Tracer ZN.520 is factory- mounted, tested, wired, config- ured and commissioned for the se- lected application.

The Tracer ZN.520 configuration has flexible point and product con- figurations. For example, with point configuration, a specific bi- nary point can be configured to ac- cept input from either a time clock or some type of generic device.

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Trane Tracer Unit Ventilator manual General Information, Tracer ZN.520 Overview

Contents

Installation Owner Diagnostics Tracer ZN.520 for Classroom Unit Ventilator Start-up Procedures Installation of New Units Power Up Sequence General Information Tracer ZN.520 Overview General Information Controller Circuit Board Features Tracer ZN.520 unit controller circuit board Service Controller FeaturesTypical Components Peer-to-Peer Communications Communication ConfigurationsIntegrated Comfort System Communication Interface Stand-AloneInteroperability End Device Specifications CharacteristicStandard End Devices Description Standard End Devices Way Control Valve Time clock Zone sensor Dpdt Control Transformer Installation and Wiring Specifications Binary Inputs Binary Outputs Generic/baseboard Heat Binary Output Analog Inputs Analog inputs Mounting Vertical classroom unit ventilator end pocket Wiring Power Installing the Wall- Mounted Zone Sensor Optional Proper zone sensor placement Humidity and CO2 Sensors Typical Wiring Diagram-Wall Mounted Zone Sensor Typical Wiring Diagram-Unit Mounted Zone Sensor Typical Wiring Diagram-Unit Input/Output Summary Input and output summary Input/Output Summary Configuration Configurable parametersCooling source Heating source Binary Outputs1 Binary input summary Configuration Binary Inputs1Analog Inputs1 Analog input summary Fan Configuration End Device ConfigurationsFan configuration ranges Default Setpoint defaults Default Valid range Discharge air limit ranges Default Valid rangeSetpoints Discharge Air Limits Power-Up Control Wait Occupied Bypass TimerMaintenance Timers Unit Identification Tag Location IdentifierWinking Power-Up Unit OperationHeating And Cooling Changeover Logic Occupancy Heat/Cool Changeover logic Fan Off Delay Cooling OperationHeating Operation Fan Operation Valve Operation Face-and-Bypass Damper OperationExhaust fan/damper operation Modulating Valves Entering Water Temperature Sampling Water assumption chartUnit Configuration Temperature Assumed1 Economizer Operation DX OperationElectric Heat Operation Baseboard Heat Operation Filter Status/ Maintenance Timer Output OverridesFan Status Other Modes Data Sharing-LonWorks Simple data sharing application 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 Troubleshooting Red Service LEDBlack Service Push Button Yellow Comm LED Test Procedure Exit6 Troubleshooting Space Temperature Failure Entering Water Temperature FailureDischarge Air Temperature Limit Outdoor Air Temperature Failure Diagnostics Troubleshooting Translating Multiple Diagnostics Rover service tool Fans Valves stay closed Probable cause Possible Explanation ValvesValves stay open Probable cause Possible Explanation Outside Air Damper DX/Electric HeatOutdoor air damper stays closed Probable cause Explanation Outdoor air damper stays open Probable Cause Explanation Tracer ZN.520 Unit Controller Replacement Replacing Circuit Boards Hardwired Setpoint Adjustment Fan Switch Resistance ValuesHardwired Thermistor Values Appendix Appendix-Binary Configuration Binary ConfigurationBinary configuration details Binary input or output Function Heat/cool mode input NviHeatCool Effective heat/ cool mode output nvoHeatCoolAppendix-Unit Operation Unit Operation Based On The Effective HEAT/COOL Output Appendix-Unit Operation Configuration properties1 Appendix-Data ListsData Lists Input/output listing1 Setting the Time Clock Appendix-TimeclockSet the Time and Day Set the Program Review and Change Programs Override Program Manual Operation Appendix-Timeclock Appendix-Location Identifier Location Identifier Location Identifier Location Identifier Trane Company