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CNT-SVX11A-EN

Replacing Circuit Boards

Tracer ZN524 Unit Controller
Replacement

WARNING
Hazardous Voltage!

Disconnect all electric power, including
remote disconnects before servicing.
Follow proper lockout/tagout proce-
dures to ensure the power can not be
inadvertently energized. Failure to dis-
connect power before servicing could
result in death or serious injury.

1. Disconnect power or disable the

circuit breaker to unit.

2. Remove bad or questionable

Tracer ZN524 controller circuit
board.

3. Install controller in the unit with

the heat-sink placement at the
top of the control box.

4. Connect the power to the circuit

board ONLY.

5. Connect Rover and properly

configure the controller, unless a
previously configured board is
purchased.

6. Power down.

7. Connect the remaining input and

output wiring to the controller and
comm wire.

8. Reapply power.

9. Complete sequence 7 and 8 above

in the installation section of this
manual.

10. Record NID numbers and unit

location

11. Refer to BAS manual for

instructions on how to configure
the new ZN524 into BAS system.

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Содержание Tracer ZN524

Страница 1: ...Installation Owner Diagnostics Tracer ZN524 for water source heat pumps Order No CNT SVX11A EN Date August 2003 CNT SVX11A EN...

Страница 2: ...hazordous situation which if not avoided could result in death or serious injury WARNING CAUTION Indicates a potentially hazordous situation which if not avoided could result in minor or moderate inju...

Страница 3: ...8 Installation and Wiring 10 Typical Wiring Diagram 18 Waterside Ecomomizer Typical Wiring Diagram 19 Hot Gas Reheat Configuration 20 Location Identifier 23 Unit Operation 24 Troubleshooting 32 Repla...

Страница 4: ...een made to theTracer ZN524 unit controller when applicable 8 Write the Unit Identification number using the IDENTIFICATIONTAG on the unit in the Appendix of this document or on building plans for fut...

Страница 5: ...the features and functionality of the direct digital control without a front end building automation system while providing future considerations for ICS Equipment problems can often be diag nosed on...

Страница 6: ...re 2 Tracer ZN524 unit controller circuit board A B E D C H F G Controller features A Power Connections B Generic Connections BOP C Status LED D AutoTest Button E Zone Sensor Connections F Service But...

Страница 7: ...ch nicians TheTracer ZN524 also includes features such as a test output to manually test all of the end devices See Manual OutputTest on page 32 for more infor mation Typical Components A typical wate...

Страница 8: ...a loss of performance or equipment malfunctions The ICS system also allows all of the water source heat pumps to share infor mation without the presence of hard wired sensors at each unit Some typi c...

Страница 9: ...ectly connected to a stand aloneTracer ZN524 connected to the communications jack in theTrane zone sensor or connected to a communicat ing unit sTracer ZN524 unit controller to access all of the units...

Страница 10: ...AC nominal 50 or 60 Hz 570 mA AC Operating Environment 32 to 140 F 0 to 60 C 5 to 95 relative humidity non condensing Storage Environment 40 to 185 F 40 to 85 C 5 to 95 relative humidity non condensin...

Страница 11: ...Valid range Output Load Load Output Location Rating Energized De Energized BOP 1 J1 1 Fan NA 12VA 1 VAC RMS 24 VAC RMS BOP 2 J1 2 Reversing valve NA 12VA 1 VAC RMS 24 VAC RMS BOP 3 J1 3 Electric heat...

Страница 12: ...outside air temperature 40 to 2120 F 400 to 1000 C AI 2 J3 3 Discharge air temperature 40 to 2120 F 400 to 1000 C J3 4 AI 3 J3 5 Leaving water temperature 40 to 2120 F 400 to 1000 C J3 6 AI 4 J3 7 Un...

Страница 13: ...e Tracer ZN524 by removing the front panel also six screws total See Figure 10 Removing the screws and panel allows access to the components of the control board For additional convenience quick con n...

Страница 14: ...nents are factory wired Zone sensors and communication wiring is to be installed by the contractor Power wiring must be separated from theTracer ZN524 and all low voltage wires External input wires sh...

Страница 15: ...zone with multiple units to ensure adequate control and comfort throughout the space The following are typical areas where the zone sensor should not be mounted Near drafts or dead spots e g behind do...

Страница 16: ...the number of minutes in the unit controller config uration usingTrane s service tool Rover The controller remains in occu pied standby mode until the override timer expires or until the cancel button...

Страница 17: ...on Space temperature 0 2 C resolution ON and CANCEL buttons External setpoint Communication jack Vertical case withTrane logo Part number X13510635010 Description Space temperature 0 2 C resolution ON...

Страница 18: ...18 CNT SVX11A EN Typical wiring diagram Figure 12 Wiring diagram with Waterside Economizer option...

Страница 19: ...CNT SVX11A EN 19 Typical wiring diagram Figure 13 Wiring diagram with Hot Gas Reheat option...

Страница 20: ...s units Table 7 defines the configuration options sup ported by the ZN524 controls Configurable parameters Rover service tool uses the unit type to determine and download many other aspects of the uni...

Страница 21: ...ng setpoint 78 F 40 to 115 F Unoccupied heating setpoint 60 F 40 to 115 F Unoccupied cooling setpoint 85 F 40 to 115 F Heating setpoint low limit1 40 F 40 to 115 F Cooling setpoint low limit1 40 F 40...

Страница 22: ...The occupied bypass timer is used for timed override applications Occupied Bypass Timer Table 12 Control wait timer Default Valid Range Power up control wait 2 minutes 120 seconds Disable or enable Po...

Страница 23: ...tion for a unit is Conference Room 101 the ZN524 Rover theTrane Loop Controller service tool andTracer Summit will recognize this clear English description C If location identification is not defined...

Страница 24: ...D STANDBY mode The OCCUPIED STANDBY mode allows the unit to operate at a heating or cooling setpoint between the occupied and unoccupied setpoints to help maintain the environment while decreasing ene...

Страница 25: ...and cooling to heating when the integration term exceeds 900 F Sec Along with satisfying the integration for heating and cooling changeover the measured space temperature must fall outside the setpoin...

Страница 26: ...the com municated or hardwired fan speed is off During the UNOCCUPIED mode the unit fan is controlled off When capacity is required to maintain the UNOCCUPIED heating or cooling setpoint the unit fan...

Страница 27: ...ontrolling the zone If the WSE capacity can not cool the zone then 1 stage of compressor cooling will be allowed to operate with the WSE The second stage of compressor cooling will not be allowed to r...

Страница 28: ...ized first Compressor 2 waits until the next con trol cycle 10 seconds to energize Water Isolation Valves The ZN524 supports the operation of water isolation valves for varialble speed pumping systems...

Страница 29: ...cooling and reheat are allowed to operate again Note While in the dehumidification mode if there is a call for capacity by the unit the zone temperature setpoint will take priority over the relative h...

Страница 30: ...ted ON 2 TheTracer ZN524 controller has a binary input available for a fan status device current sensing relay which can provide feedback of fan operation If the device does not indicate fan operation...

Страница 31: ...communication wire with or without the presence of a front end building management system See Figure 16 Simple data sharing appli cation This ability allows units to operate with the same data to pre...

Страница 32: ...17 Yellow comm LED activity Manual Output Test The test sequence verifies output and end device operation The manual out put test can be conducted to verify out put wiring and actuator operation with...

Страница 33: ...Air Generic Valve Reheat 1 2 Valve 1 Valve 2 Economizer Damper BO1 BO2 BO3 BO4 BO5 BO6 BO7 BO8 BO9 BO10 1 Off1 Off Off Off Off Off Off Off Off Off Off 2 Fan2 On 3 Isolation On On Valve 1 4 Waterside...

Страница 34: ...AIP Failure If theTracer ZN524 has validated a generic analog input and then the input becomes invalid a generic analog input failure diagnostic occurs Defrosting Compressor Lockout The defrost stat u...

Страница 35: ...al reset Discharge Air Fan on Auto reset once within 24hrs Temperature Compressor disable If safety generates a diagnostic Limit Waterside Economizer enabled Non Latching more than once a communicated...

Страница 36: ...ing Communicated or manual reset Failure3 Compressor enabled Local Fan enabled Setpoint Valves enabled Non latching Communicated or manual reset Failure3 Outdoor air damper enabled Invalid Fan disable...

Страница 37: ...ection Manual output test The test button on the controller may be used either during installation to verify proper end device operation or during troubleshooting When theTest button is pressed the co...

Страница 38: ...its power up control wait once it receives communicated information 2 The controller exits power up control wait once the power up control wait time expires Diagnostic present A specific list of diagn...

Страница 39: ...off and valves to close Requested mode off You can communicate a desired operating mode such as off heat and cool to the controller When off is communicated to the controller the unit controls the fan...

Страница 40: ...rrect for normal damper operation Unit configuration The controller must be properly configured based on the actual installed end devices and application When the unit configuration does not match the...

Страница 41: ...ration Unit configuration The controller must be properly configured based on the actual installed end devices and application When the unit configuration does not match the actual end devices the dam...

Страница 42: ...2 Remove bad or questionable Tracer ZN524 controller circuit board 3 Install controller in the unit with the heat sink placement at the top of the control box 4 Connect the power to the circuit board...

Страница 43: ...Auto 4 870 Off Resistance V V Temperature 87 5kV 0 F 74 6kV 5 F 63 8kV 10 F 54 6kV 15 F 46 9kV 20 F 40 4kV 25 F 34 8kV 30 F 30 2kV 35 F 26 2kV 40 F 22 8kV 45 F 20 0kV 50 F 17 5kV 55 F 15 3kV 60 F 13 5...

Страница 44: ...mal diagnostic When the controller commands the fan on and the binary input closes BIP is active no diagnostic J1 1 Fan Normally open De energized Fan off Energized Fan on J1 2 RV Normally open De ene...

Страница 45: ...Cooling Disabled Damper Disabled Cooling Cooling Fan Enabled Heating Disabled1 Cooling Enabled Damper Enabled Auto Pre cool Pre cool Fan Enabled Heating Disabled1 Cooling Enabled Damper Disabled Off O...

Страница 46: ...Damper Disabled Off Any state Off Fan Disabled Heating Disabled Cooling Disabled Damper Disabled Test Any state Determined by controller Fan Enabled Heating Enabled Cooling Enabled Damper Enabled Fan...

Страница 47: ...tPT 36 Space RH Setpoint Input SNVT type Output SNVT type nviRequest SNVT_obj_request nvoStatus SNVT_obj_status nviSpaceTemp1 SNVT_temp_p nvoFileDirectory SNVT_address nviSetpoint SNVT_temp_p nvoSpace...

Страница 48: ...48 CNT SVX11A EN Location Identifier...

Страница 49: ...CNT SVX11A EN 49 Location Identifier...

Страница 50: ...50 CNT SVX11A EN Location Identifier...

Страница 51: ...CNT SVX11A EN 51 Location Identifier...

Страница 52: ...Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice Trane A business of American Standard Companies www tran...

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