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46

CNT-SVX11A-EN

Appendix - Unit
Operation

Application 

Heat/cool mode input

Effective heat/ cool 

Unit Operation

mode input

(nviHeatCool)

mode output 

(nviApplicMode)

(nvoHeatCool)

Cool

Any state

Cool

Fan—Enabled

Heating—Disabled
Cooling—Enabled
Damper—Enabled

Pre-cool

Any state

Pre-cool

Fan—Enabled
Heating—Disabled
Cooling—Enabled
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 only

Any state

Fan only

Fan—Enabled
Heating—Disabled
Cooling—Disabled
Damper—Enabled

Note: Night purge, Emergency heat, and Nul modes are not supported by the Tracer ZN524 Unit Controller. If one of these
modes is received by the controller, it is interpreted as Auto.

Table 30:

Unit operation based on H

EAT

/C

OOL

ouput - continued

Summary of Contents for Tracer ZN524

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

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

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

Page 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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