Trane Tracer Unit Ventilator, ZN.520 manual Stand-Alone, Communication Interface, Interoperability

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Communication Configurations

Stand-Alone

In a stand-alone configuration, commands for operation are deter- mined based on input from the zone sensor, humidity sensor, and

factory- or field-mounted time- clock.(See Figure 6: “Typical class- room unit ventilator installation”)

qThe timeclock is wired to the Tracer ZN.520 to index the unit between occupied and unoccupied modes.

qA unit-mounted, analog, outside-air temperature sensor is used to initiate the dry bulb economizer and freeze avoidance routines.

qOn changeover units, a unit- mounted, analog, entering water temperature sensor is used to automatically control the system in the heat/cool mode.

These sensors are required for proper system operation and are provided as standard on stand- alone units.

Figure 6: Typical classroom unit ventilator installation

Communication Interface

Important! To help ensure optimal performance of the Rover service tool, please use the latest version. To obtain the latest version contact your local Trane sales represent- tative or service technician.

Note: Refer to the Tracer system manuals for more information on communica- tions.

The Tracer ZN.520 communicates via Comm5 (LonTalk) to a building management system, the Rover service tool, and other unit control- lers on the communications link. Each Tracer ZN.520 requires a unique address for the system to operate properly. Every Tracer ZN.520 has this address (Neuron ID) embedded in the microproces- sor, which eliminates the need for field-addressing of the units. Each unit also ships from the factory with a unit identification tag. (See “Location Identifier” on page38,

for more information.)

Building automation system

Trane offers a state-of the art front- end building automation system designed to coordinate and moni- tor Trane equipment and control- lers: Tracer Summit.

The Tracer Summit system allows the user to monitor and/or change Tracer ZN.520:

qstatus, parameters, sensor data, diagnostics, and internal variables; and

qsetpoints, operating modes, and outputs.

Service tool

Trane also offers a service tool to work in conjunction with the Tracer Summit system or with peer-to- peer and stand-alone systems: the Rover service tool.

Communication to the Tracer ZN.520, or multiple controllers, can also be accomplished by using the ICS software service tool.

Apersonal computer running Rov- er may be directly connected to a standalone Tracer ZN.520; con- nected to the communications jack in the Trane zone sensor; or con- nected to a communicating unit’s Tracer ZN.520 unit controller, to ac- cess all of the units on a communi- cating link.

Rover allows the user to interface with the Tracer ZN.520, but will not allow any advanced control (e.g. equipment scheduling or trend- ing). To purchase a copy of the ICS software service tool, contact the BAS department at your local Trane dealer.

Interoperability

Trane has lead the industry with BACnet interoperability and Trane is now expanding the realm of in- teroperable solutions by offering LonMark certified unit controllers. The Tracer ZN.520 controller con- forms to the LonMark Space Com- fort Controller profile. (See

“Appendix—Data Lists” on page64, for more information.) This allows the ZN.520 to be used

as a unit controller on other control systems that support LonTalk and the SCC profile. Now building own- ers have more choices and design engineers have more flexibility to meet the challenges of building au- tomation.

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Contents Tracer ZN.520 for Classroom Unit Ventilator Installation Owner DiagnosticsInstallation of New Units Start-up ProceduresPower Up Sequence Tracer ZN.520 Overview General InformationGeneral Information Tracer ZN.520 unit controller circuit board Controller Circuit Board FeaturesController Features ServiceTypical Components Communication Configurations Peer-to-Peer CommunicationsIntegrated Comfort System Stand-Alone Communication InterfaceInteroperability Characteristic End Device SpecificationsStandard End Devices DescriptionStandard End Devices Way Control Valve Time clock Zone sensor Dpdt Control Transformer Specifications Installation and WiringBinary Inputs Generic/baseboard Heat Binary Output Binary OutputsAnalog inputs Analog InputsMounting Vertical classroom unit ventilator end pocket Power WiringProper zone sensor placement Installing the Wall- Mounted Zone Sensor OptionalHumidity 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 SummaryInput/Output Summary Configurable parameters ConfigurationCooling source Heating sourceBinary Outputs1 Binary Inputs1 Binary input summary ConfigurationAnalog Inputs1 Analog input summaryEnd Device Configurations Fan ConfigurationFan configuration ranges DefaultDischarge air limit ranges Default Valid range Setpoint defaults Default Valid rangeSetpoints Discharge Air LimitsOccupied Bypass Timer Power-Up Control WaitMaintenance Timers Location Identifier Unit Identification TagWinking Unit Operation Power-UpHeating And Cooling Changeover Logic OccupancyHeat/Cool Changeover logic Cooling Operation Fan Off DelayHeating Operation Fan OperationFace-and-Bypass Damper Operation Valve OperationExhaust fan/damper operation Modulating ValvesWater assumption chart Entering Water Temperature SamplingUnit Configuration Temperature Assumed1DX Operation Economizer OperationElectric Heat Operation Baseboard Heat OperationOutput Overrides Filter Status/ Maintenance TimerFan Status Other ModesSimple data sharing application Data Sharing-LonWorksMore 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 Red Service LED TroubleshootingBlack Service Push Button Yellow Comm LEDExit6 Test ProcedureTroubleshooting Entering Water Temperature Failure Space Temperature FailureDischarge Air Temperature Limit Outdoor Air Temperature FailureDiagnostics Troubleshooting Translating Multiple Diagnostics Fans Rover service toolValves Valves stay closed Probable cause Possible ExplanationValves stay open Probable cause Possible Explanation DX/Electric Heat Outside Air DamperOutdoor air damper stays closed Probable cause Explanation Probable Cause Explanation Outdoor air damper stays openReplacing Circuit Boards Tracer ZN.520 Unit Controller ReplacementFan Switch Resistance Values Hardwired Setpoint AdjustmentHardwired Thermistor Values AppendixBinary Configuration Appendix-Binary ConfigurationBinary configuration details Binary input or output FunctionEffective heat/ cool mode output nvoHeatCool Heat/cool mode input NviHeatCoolAppendix-Unit Operation Unit Operation Based On The Effective HEAT/COOL OutputAppendix-Unit Operation Appendix-Data Lists Configuration properties1Data Lists Input/output listing1Appendix-Timeclock Setting the Time ClockSet the Time and Day Set the ProgramOverride Program Manual Operation Review and Change ProgramsAppendix-Timeclock Appendix-Location Identifier Location Identifier Location Identifier Location Identifier Trane Company
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