Trane ZN510 Controller User's Manual
Contents
1. 1PB1 3 2 3 LEGEND JA DEVICE ck e DESCRIPTION EQUIPMENT DESIGNATION GROUND 1PB1 POWER BLOCK 460 VOLT 1K1 BLOWER CONTACTOR 1K2 SAH ylle SA l 1K2 COMPRESSOR CONTACTOR 1 a te N m i x 8 i 1K3 COMPRESSOR CONTACTOR 2 na T2 ika R i a I 1K8 RELAY REVERSING VALVE 4 JAH mily AA z 1T1 2 CONTROL POWER TRANSFORMER aii l 281 COMPRESSOR MOTOR 1 24 VAG i 2B2 COMPRESSOR MOTOR 2 lo MERG 2B1S1 HIGH PRESSURE CONTROL 1 3H a 2B1S5 LOW PRESSURE CONTROL 1 2B2S1 HIGH PRESSURE CONTROL 2 Ce kp Ew ge tL 2B2S5 LOW PRESSURE CONTROL 2 ba SE 3B1 FAN MOTOR n H 1U1 COMFORTLINK 10 mU i se 2e te 4L1 2 REVERSING VALVE i 1 ym MM BLU i 4 ARTI LEAVING WIR TEMP SENSOR CKT 1 1 24 VAC 4RT2 DISCHARGE AIR TEMP SENSOR 208 230 455 CONDENSATE OVERFLOW SWITCH 1 1 456 FREEZESTAT CIRCUIT 2 H IKB BB aoa AT ogy TBS 1 ele MU o 1TB1 TERMINAL BOARD i y 42 w i 1TB5 TERMINAL BOARD 202A 205A cl 40 1TB5 2 1TB5 4 ra 88 IO len ee da 17A YEL YY BLU 15A L 24 VAC J 1K3 2B2S1 28255 1181 17 17L oqe 68A B9A 66A 1K2 2B1S1 2B1S5 1181 15 17G oe 37A 54A BA 17J H 1B A 36A 1181 15 o jo Yr OPTIONAL 17H 1K1 40A na a Gei FIELD SUPPLIED ie hA 2 POSITION OUTSIDE 19 es AIR DAMPER 1781 13 ue a 4 RR OND 2w d 1 2 3 4 5 67 ah ii a a l EELER FREEZESTAT BINARY OUTPUTS2. WSHP IOP 2 S TRANE May 1998 Installation Operation and Programming Tracer ZN510 Controller Literature History The Trane Company has a policy of continuous product improvement and it reserves the right to change specifications and design without notice Installation Operation WSHP IOP 2 and Programming Library Service Literature Product Section Unitary Product Water Source Heat Pumps Model 000 Literature Type Installation O and Programming peration Sequence 1 Date April 1998 File No SL UN 000 WSHP IOP 2 0498 Supersedes New Related Literature e CNT IOP 1 ZN510 1 Controller Installation Operation and Pro graming e WSHP PD 1 Water Source Heat Pump Controller Product Data Sheet 1998 American Standard Company e WMCA PD 1 ZN510 Loop Con troller Product Data sheet WSHP IOP 3 ZN510 Water Source Heat Pump Controller Installation Operation and Pro gramming Guide e WMCA IOP 1 ZN510 Controller Installation Operation and Pro gramming Guide Table of Contents Start up Procedure 4 Power up Seguence 5 Unit Identification Tag 6 Unit Operation 7 General Information 7 Communication 7 Power 8 Binary Outputs 8 Analog Outputs 9 Binary Inputs 9 Analog Inputs 12 Zone Sensors 15 Heating or Cooling Control 18 Mode Operation Single or Dual Compressor 19
3. AVERTISSEMENT VOLTAGE HASARDEUX DECONNECTEZ TOUTES LES SOURCES ELECTRIQUES INCLUANT LES DISJONCTEURS SITUES A DISTANCE AVANT D EFFECTUER L ENTRETIEN FAUTE DE DECONNECTER LA SOURCE ELECTRIQUE AVANT D EFFECTUER UENTRETIEN PEUT ENTRAINER DES BLESSURES CORPORELLES SEVERES OU LA MORT IMPORTANT USE COPPER CONDUCTORS ONLY TO PREVENT EGUIPMENT DAMAGE cw 4A 5D u al a UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT ANY OTHER WIRING LEGEND DEVICE hal ny oper DESIGNATION DESCRIPTION i 460 VOLT 1 x ol 1K1 BLOWER RELAY a E 1K2 COMPRESSOR CONTACTOR m i YEL BLU i 24 VAC i 1m CONTROL POWER TRANSFORMER H 2B1 COMPRESSOR MOTOR 1 INSET B 2B1S1 HIGH PRESSURE CONTROL 1 CONDENSATE OPTIONAL s OVERFLOW OCCUPANCY ONNECTIONS 2B1S5 LOW PRESSURE CONTROL 1 1U1 COMFORTLINK 10 3B1 FAN MOTOR 3B1C1 FAN RUN CAPACITOR 4L1 REVERSING VALVE 4RT1 LEAVING WTR TEMP SENSOR 4RT2 DISCHARGE AIR TEMP SENSOR 455 CONDENSATE FLOAT SWITCH 1TB1 TERMINAL BOARD OPTIONAL FIELD SUPPLIED 2 POSITION OUTSIDE AIR DAMPER 24 VAC 1 17 mA 1781 18 a nDagganoa BINARY OUTPUTS P1 12 32 3 z m L a na PIsts 4RT2 2 d a
4. e Single fan speed N TWISTED PAIR OF WIRE USED IN INSTALLATI are provided for direct con nection of Rover to the ZN510 Board or provided as spare ter minals Two terminals TB2 3 TB2 4 are connected to the field terminal strip 1TB1 14 1TB1 16 for connection to the communication link daisy chain e Up to two compressors e Reversing valve 2 position outdoor air damper or generic binary output Peer to peer communication across controllers is possible even when a building automation system is not present ZN510 is also adaptable as a standalone system COMMS TLINKIN WATER SOURCE Two terminals TB2 5 TB2 6 are connected to the field terminal strip 1TB1 5 1TB1 6 which should be connected to the zone sensor communication jack This provides direct connect of Rover to the commu nication link without having to connect directly to the ZN510 board or provided as spare ter minals e The field terminal strip 1TB1 provides screw terminations for all field connections Space Communication Connection 20 pole low voltage terminal strip screw connections for field hook up Link Figure 3 Communication Wiring 7 Communication Zone Sensor Power The ZN510 controller is powered by 24 VAC A total of two 1 4 inch guick connect terminals are provided for 24 VAC connection to the board See Figure 4 for ZN510 power requirement Note Power for field instal
5. CIRCUIT 2 458 74A 2 l 2 170 a MA 4RT2 lt wt EP E ya CONDENSATE 2 DISCHARGE AR OVERFLOW E 33a 5 WEN SENSOR gr ART1 opTionaL OCCUPANCY m J LY CONNECTIONS E COMM LINK ZONE SENSOR E h LEAVING WATER T 3 kM 2 ptt ANSOR es Bs dd All A I CIRCUIT 1 is Qs afl al afl al ip i id al PS ZONE GND SET FAN GNO FAN MODE 24A 4 SET PONT 23A mm ZONE SENSOR COMMON 22A 1 2 CONNECTIONS ZONE TEWP ZA m1 COMM 26A Soma COMMUNICATIONS COMM 25A m s ZONE SENSOR COMM 18A 116 COMMUNICATIONS COMM 19A 1m LINK NOTES lt 1 TRANSFORMER 1T1 SHOWN IS WIRED FOR 230V RED LEAD IS FOR 208V SEE INSET A FOR 460V TRANSFORMER 5 UNLESS OTHERWISE NOTED ALL SWITCHES ARE SHOWN AT 25 C 77 F AT ATMOSPHERIC PRESSURE AT 50 RELATIVE HUMIDITY WITH ALL UTILITIES TURNED OFF AND AFTER A lt _2 CONDENSATE OVERFLOW SWITCH 4S5 IS OPTIONAL NORMAL SHUTDOWN HAS OCCURRED 6 DASHED LINES INDICATE RECONMENDED FIELD WRING BY OTHERS DASHED LINE ENCLOSURES lt C4 REVERSING VALVE 4L1 4L2 TRANSFORMER 172 REVERSING VALVE RELAY 1KB AND OR DASHED DEVICE OUTLINES INDICATE COMPONENTS PROVIDED BY THE FIELD PHANTOM AND TERMINAL STRIP 1TB5 ARE STANDARD WTH HEAT PUMP ONLY UNE ENCLOSURES INDICATE ALTERNATE CIRCUITRY OR AVAILABLE SALES OPTIONS SOLID LINES INDICATE WIRING BY TRANE CO Specifications Board Dimensions Height 4 102mm Width 5 1 2 140 mm Depth 2 1 4 57mm Ope
6. switches automatically reset The high or low pressure cutout diagnostic may need to be manually reset to clear the diagnostic and enable compressor operation for the fault circuit Unit Operation 24 VAC Figure 7 High and low pressure switch Note The ZN510 controller includes an automatic diag nostic reset function that allows the controller to automatically recover after a high or low pres sure cutout diagnostic After 30 minutes the con troller will reset the diagnostics Most diagnostics occur due to intermittent water tem perature or flow problem The smart reset may eliminate many service calls Analog Inputs The ZN510 controller has five available analog inputs Al These inputs are factory configured for the following functions e Zone Space temperature e Set Local setpoint Fan Fan mode input Discharge Air Sensor Al 1 Leaving water tem perature Circuit 1 e Al 2 Discharge air tem perature Leaving Water See Figure 8 for analog inputs Sensor Circuit on EF ER F Sm om om cm Figure 8 Analog inputs NE 5 be HE mo nc E Space Temperature ZN510 controls the space temperature according to the active space temperature the active heating cooling setpoint and the space temperature control algorithm The ZN510 controller receives the space temperature from either a wired zone sensor or as a communicated value When neither a zone sensor nor c
7. are calculated based on the hardwired setpoint values the configured setpoints and the active mode of the controller Setpoint Operation The controller has three methods of heating and cooling setpoints operation See Table 5 for the methods of setpoint operation Method Situation used Zone Sensor with an adjustable hardwired setpoint A hardwired adjustable setpoint is connected to the controller Local setpoints are enabled in the unit configuration No communicated setpoint is present Communicated source A setpoint is communicated to the unit controller typically from a building automation system or a peer controller If both a hardwired setpoint and a communicated setpoint exist the controller uses the communicated value The configuration feature for enabling or disabling the local setpoint does not affect the setpoint handling when communicated setpoints are used The communicated setpoint always takes priority over the hardwired setpoint even when the local setpoint is enabled Stored default setpoints The controller uses the locally stored default heating and cooling setpoints when neither a local hardwired setpoint or communicated setpoint is present When a building automation system is present the controller uses the default setpoints when no setpoint is communicated to the controller and no hardwired setpoint exists The controller uses stored default setpoints when only a local setpoint
8. compressors off prior to changing the reversing valve state 7 Heat 1 On Off On Off Closed 8 Heat 2 On Off On On Closed 9 Outdoor air damper On Off Off Off Open 10 Exit After the outdoor air damper step the test sequence performs the exit step This initiates a reset and attempts to return the controller to normal operation Testing the Heat Pump Configurations The outputs are not subject to minimum times during the test sequence However the test sequence only permits one step per second which limits output time All outputs are exercised regardless what timer they are or are not configured for For example single compressor heat pumps function the same as two compressor units For single compressor units the cool 2 and heat 2 steps control the appropriate binary outputs but do not affect unit operation Reversing valve and damper outputs cycle independent of configuration 23 Pump Operation for Systems with ZN510 Loop Controller During Unoccupied the pumps will be OFF but should be energized to test compressor operation The user must override the pumps either at the ZN510 Loop Controller or by pushing the ON button of the zone sensor This will send the units to an occupied bypass which will turn the pumps on prior to operating manual output test Ouestionable Unit Operation Troubleshooting Table 13 Fan output does not energize Probable Cause Explanation Random star
9. tag is factory mounted and provided for easy identification of an installed unit It contains model number tagging and location information See Figure 1 The top portion of the unit identification tag remains permanently affixed to the unit for identity purposes The bottom portion of the tag provides pertinent information that is removable to be placed on building plans or in the ZN510 IOP on page 33 This provides identification history about the unit s location for guick reference These tags provide information about unit location unit serial number and NID neuron identification number The NID is similar to the serial number of the unit but is specific to the identification of the ZN510 Board The location identification is a customer defined clear English description of the unit s physical location This is a 27 character description of the location For example if the location identification for a unit is Conference Room 101 the ZN510 and Rover the Trane Comm 5 service tool will recognize this clear English description so maintenance can be performed on the appropriate unit If location identification is not defined it will default to the unit serial number This provides some information so the user has multiple references to the unit The blank location is provided for field modification in case the unit is moved from the initial location Unit identification Tag Unit Identification Tag Mode
10. vacant In unoccupied mode the controller always uses the default unoccupied heating and cooling setpoints stored in the controller As the unit goes unoccupied the compressors ON timers are ignored and the compressors are disabled When ZN510 controls the space to unoccupied mode the occupant may have the ability to request timed override through the Trane zone sensor s ON button Based on the controller or system setup the Single and Dual Compressor Operation controller interprets the request and initiates the occupied setpoint operation During a timed override the controller applies the occupied heating and cooling setpoint but reports the effective occupancy mode as occupied bypass mode In the occupied bypass mode a building automation system can detect whether the occupancy mode was overrode Morning Warm Up The damper field installed or for the console product remains closed during morning warm up until the space temperature is within two degrees of the effective heating setpoint The 2 position outdoor air 19 damper normally is open during the occupied mode when the controller turns on the unit fan The damper is normally closed during e occupied mode when the fan is OFF warm up cool down mode occupied standby mode unoccupied mode certain diagnostic conditions ZN510 keeps the 2 position outside air damper closed on a transition from unoccupied mode to occupied mode as
11. 2 VA 1 VAC RMS typical 24 VAC RMS typical Binary Output 5 J1 6 12 VA 1 VAC RMS typical 24 VAC RMS typical Binary Output 6 J1 7 12 VA 1 VAC RMS typical 24 VAC RMS typical Table 20 Analog Inputs Description Terminals Function Range Zone TB3 1 Zone temperature input 5 to 122 F 15 to 50 C Ground TB3 2 Analog ground NA Set TB3 3 Setpoint input 40 to 115 F 4 4 to 46 1 C Fan TB3 4 Fan switch input OFF 4821 to 4919 Ohms AUTO 2297 to 2342 Ohms Ground TB3 6 Analog ground NA Analog Input 1 J3 1 Leaving water 40 to 212 F 40 to 100 C temperature J3 2 Analog ground NA Analog Input 2 J3 3 Discharge air temperature 40 to 212 F 40 to 100 C J3 4 Analog ground NA 32
12. Diagnostics section on page 27 No power to the controller If the controller does not have power the unit fan does not operate For the ZN510 controller to operate normally it must have an input voltage of 24 VAC When the green LED is off continuously the controller does not have sufficient power or has failed Unit configuration The controller must be properly configured based on the actual installed end devices and application Manual output test The controller includes a manual output test seguence that may be used to verify output operation and associated output wiring However based on the current step in the test seguence the unit fan may not be on Refer to the manual output overrides on page 9 Unit wiring The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal fan operation 24 Ouestionable Unit Operation Troubleshooting Table 14 Compressor s not running Probable Cause Explanation Normal operation The controller compressor s turn on and off to meet the unit capacity reguirements Reguested mode off The desired operating mode such as off heat and cool can be communicated to the controller When off is communicated to the controller the unit shuts off all unit compressor s Communicated disable Numerous communicated requests may disable the compressor including a compressor enable in
13. Operation Data Sharing 20 Configuration 21 Troubleshooting 22 Diagnostics 27 ZN510 Controller Replacement 28 Wiring Diagram 29 Hardware Specifications 31 Appendix 33 Start up Procedure Installation of New Units 1 Follow all instruction for installation of water source heat pumps as detailed in the IOM Installation Operation Maintenance manual 2 Disconnect power or disable the circuit breaker to unit 3 Run communication link wire to field terminal strips 14 and 16 See wiring diagram in the unit 4 Install zone sensor to low voltage control terminals 1 through 6 See wiring diagram in the unit and zone sensor submittals Zone Sensor Placement Zone sensor location is an important element of effective room control and comfort The best sensor location is typically ona wall remote from the HVAC unit Readings at this location assure that the desired setpoint is achieved across the space not just near the unit itself It may be necessary to subdivide the zone with multiple units to ensure adequate control and comfort 5 Verify that water connections have been made to unit then ensure that water is circulating through the unit 6 Reapply power 7 Check for STATUS GREEN LED operation to ensure power and communication has been made to the ZN510 Peel IDENTIFICATION TAG from unit and place in the ZN510 IOP on a copy of Sheet 6 of this document or on building plans for future loc
14. Trane s service tool Rover can reset diagnostics in the ZN510 controller For complete information about Rover refer to the Rover product literature Alarm Reset Any device that can communicate alarm reset information can reset diagnostics in the ZN510 controller ZN510 Controller Replacement 1 Disconnect power or disable the circuit breaker to unit 2 Remove bad or questionable ZN510 Controller 3 Install controller in the unit with the heatsink placement at the top of the control box See page 32 4 Connect the power to the ZN510 ONLY TB1 1 amp TB1 2 on ZN510 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 8 Reapply power 9 Complete sequence 7 and 8 above in the installation section of this manual 10 Refer to BAS manual for instructions on how to install the new ZN510 into BAS system MOTOR SPEED TAP HIGH MED LOW BLK BLU RED FOR MED amp LOW SPEED TIE BLACK amp PURPLE ON 460V UNIT ONLY TY UN 208 230V Jje OR _460V 30 LINE VOLTAGE L 1m1 BLK ED ORN Wiring Diagram ZA WARNING HAZARDOUS VOLTAGE DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING FAILURE TO DISCONNECT POWER BEFORE SERVICING CAN CAUSE SEVERE PERSONAL INJURY OR DEATH
15. air damper must be present and correct for normal outdoor air damper operation 26 Diagnostics Table 17 ZN510 controller diagnostics Diagnostic Fan Other Outputs Compressors Off Condensate overflow Off Damper Closed Compressor 1 Off Low temp detect Crt 1 Enabled Compressor 2 See note below Damper See note below Compressor 1 See note below Low temp detect Crt 1 Enabled Compressor 2 Off Damper See note below Compressor 1 Off Low temp detect Crt 1 and 2 Off Compressor 2 Off Damper Closed Compressor 1 Off High low press cutout Crt 1 Enabled Compressor 2 See note below Damper See note below Compressor 1 See note below High low press cutout Crt 2 Enabled Compressor 2 Off Damper See note below Compressor 1 Off High low press cutout Crt1and2 Off Compressor 2 Off Damper Closed Compressor s Off i Space temperature failure Off Damper Closed Compressor 1 Off Leaving water temp failure Enabled Compressor 2986 Neto Hel ow Damper See note below Discharge air temp failure Enabled Compressors Nevaction Damper No Action Maintenance required Compressor s No action example Filter Status pnebled Damper No Action Compressor s Enabled Local setpoint failure Enabled Damper Enabled Local fan mode failure Enabled Gompressor s Enabled Damper Enabled Invalid unit configuration Disabled Compresseris Disab
16. ation use The actual room location on the tag may be hand written The following are typical areas where the zone sensor should not be mounted Near drafts or dead spots e g behind doors or corners e Near hot or cold air ducts Near radiant heat e g heat emitted from appliances or the sun e Near concealed pipes or chimneys On outside walls or other non conditioned surfaces In air flows from adjacent zones or other units Power Up Seguence Power Up Seguence When 24 vAc power initially is applied to the ZN510 controller the following seguence occurs 1 All outputs are controlled off 2 The controller reads all inputs to determine their initial values Note Because the space tempera ture can be hardwired to the con troller or communicated the controller waits for several minutes to check for the presence of a com municated value A random start time is hard coded on every board and cannot be disabled The board generates a random time delay between 0 and 25 seconds Once this time expires the power up control wait time if configured will wait for 120 seconds The power up control wait allows ample time for a communicated request to arrive If the power up control wait time expires and the controller does not receive a communicated occupancy command the unit assumes stand alone operation Normal operation begins Unit Identification Tag The unit identification
17. closed during the transition from unoccupied to occupied This is an attempt to bring the space under control as guickly as possible Requested mode off The desired operating mode such as off heat and cool can be communicated to the controller When off is communicated to the controller the unit closes the outside air damper Manual output test The controller includes a manual output test seguence that may be used to verify output operation and associated output wiring However based on the current step in the test seguence the outdoor air damper may not be open Refer to the manual output overrides on page 9 Diagnostic present A specific list o f diagnostics affects outdoor air damper operation depending whether the unit is configured as heat pump For more information see the Diagnostics section on page 27 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 device the outdoor air damper may not work correctly No power to the controller If the controller does not have power the compressor does not operate For the ZN510 controller to operate normally a voltage input of 24 VAC must be applied When the green LED is off continuously the controller does not have sufficient power or has failed Unit wiring The wiring between the controller outputs and the outdoor
18. e request and communicate this request to the controller e If the ZN510 controller does not receive a hardwired or commu nicated request for the fan mode the unit recognizes the fan input as AUTO and the fan operates according to the default configuration Fan Off Delay When the heating output is controlled off the ZN510 automatically runs the fan ON for an additional 30 seconds to give the fan time to blow off any residual heat Unit Operation Leaving Water Temperature ZN510 uses analog input 1 Al 1 as the leaving water temperature input for use with a thermistor This input Al 1 is automatically assigned as a leaving water temperature input As explained in the binary input section the leaving water temperature input protects the heat exchanger circuit 1 from low temperatures The second heat exchanger present in units with two compressors is protected with a binary low temperature detection device Based on the application of the unit circuit operation is terminated when the leaving water temperature falls below 35 F or 20 F This is set when the unit is ordered The ZN510 controller compares the measured leaving water temperature to the leaving water temperature low limit value to determine a fault condition When the measured leaving water temperature is less than the leaving water temperature low limit the controller generates a Low Temp Detect diagnostic If the Leaving Water Temp Sensor fails to
19. e is for information only to be read by the building automation system or for troubleshooting unit operation with Rover Once a valid discharge air temperature signal has been established by the thermistor or communicated and the value is no longer present the controller generates a discharge air temperature failure diagnostic This will not disable unit operation If the sensor returns with a valid temperature the diagnostic automatically clears Zone Sensor The ZN510 controller accepts the following zone sensor inputs e Space temperature mea surement e Local setpoint internal or external on the zone sensor Fan switch Optional Timed override ON and CANCEL e Communication Jack If both hardwired and communicated space temperature Zone Sensor values exist the controller ignores the hardwired space temperature input and uses the communicated value Internal and External Setpoint Adjustment Zone sensors with an internal or external setpoint adjustment provide the ZN510 controller with a local setpoint 50 to 85 F or 10 to 29 4 C The internal setpoint adjustment is concealed under the zone sensor s cover To reveal the adjustable setpoint wheel remove the zone sensor cover The external setpoint Table 5 Methods of setpoint operation when present is exposed on the zone sensor s front cover When the hardwired setpoint adjustment is used to determine the setpoints all unit setpoints
20. exists but the local setpoint is disabled in the configuration of the controller The controller always uses the stored default unoccupied setpoints in unoccupied mode 15 Zone Sensor Features Fan Switch Optional The zone sensor fan switch provides the controller with an occupied and occupied standby fan reguest signal of OFF or AUTO If the fan control reguest is communicated to the controller the controller ignores the hardwired fan switch input and uses the communicated value The zone sensor fan switch signal can be enabled or disabled through configuration in the ZN510 controller ON or CANCEL Buttons Momentarily pressing the ON button Table 6 Zone Sensor Options Zone Sensor during unoccupied mode places the controller in occupied bypass mode for 120 minutes You can adjust the number of minutes in the unit controller configuration using Trane s service tool Rover The controller remains in occupied standby mode until the override timer expires or until the CANCEL button is pressed Communication Jack Use the RJ 11 communication jack as the connection point from Rover to the communication link when the communication jack is wired to the communication link at the controller By accessing the communication jack via Rover entrance to all controllers on the link may be gained Part Number X13510628010 Description Space temperature 0 2 C resolution Internal setpoint Commu
21. f BOP 6 is configured as a generic binary output the state of the output is not affected by the low temperature detection diagnostic or by other diagnostics Condensate Overflow A condensate overflow switch detects the condensate condition The condensate overflow switch is a normally closed device This switch is physically connected to the binary input 2 BI 2 When the condensation reaches the trip point the binary input detects the diagnostic condition A condensate overflow signal generates a diagnostic which disables the fan disables all compressors and closes the 2 position outdoor air damper when present The condensate overflow diagnostic does not affect the generic binary output when present Note The condensate overflow switch located in the condensate pan auto matically resets when the conden sation returns to normal levels However you must manually reset the controller s condensate over flow diagnostic to clear the diagnos tic and restart the unit Refer to page 28 on how to reset a unit Occupancy ZN510 uses the occupancy binary input for two occupancy related functions For standalone controllers any unit not receiving a communicated occupancy request typically from a building automation 10 system the occupancy binary input determines the unit s occupancy based on the hardwired signal Typically the signal is a dry set of binary contacts which is either connected to a switch or t
22. figuration Configuration Table 8 Heat pump heating or cooling operation information such as the default analog inputs the default binary inputs and the default binary output configurations See Table 7 for default configurations for heat pumps Unit Type Heat pump Cooling Source Compressor Heating Source Compressor none for cooling only units Compressors 1 2 for 2 compressor units Binary Outputs BOP 1 Fan on normally open BOP 2 Reversing valve normally open BOP 3 Not used BOP 4 Compressor 1 normally open BOP 5 Compressor 2 normally open BOP 6 Outdoor Air Damper normally open Binary Inputs Bl 1 Low temperature detection circuit 2 normally closed Bl 2 Condensate overflow normally closed t BI 3 Occupancy normally open Analog Inputs Zone Space temperature 0 0 F calibration Set Setpoint 0 0 F calibration Fan Fan mode Al 1 Leaving water temperature Al 2 Discharge air temperature Fan Fan operation heating Cycling Fan operation cooling Cycling Fan speed default heating On high Fan speed default cooling On high Fan switch hardwired Enabled Setpoints Unoccupied cooling setpoint 85 F Occupied standby cooling 78 F Occupied cooling setpoint 74 F Occupied heating setpoint 71 F Occupied standby heating 67 F Unoccupied heating setpoint 60 F Cooling setpoint high limit 115 F Cooling setpoi
23. imeclock contacts When a hardwired occupancy signal is open the unit switches to occupied mode if the occupancy input is configured as normally open When a hardwired occupancy signal is closed the controller switches to Unoccupied mode In Occupied mode the controller operates according to the occupied setpoints In Occupied Standby Mode the unit controller operates according to the Occupied Standby setpoints When the controller receives a communicated unoccupied reguest the controller Unit Operation operates according to the unoccupied setpoints regardless of the state of the hardwired occupancy input If neither the binary input nor the communicated input is used to select the occupancy mode the Table 4 Normally open hardwired input configuration Bl 3 controller defaults to occupied mode because the occupancy binary input if present typically is configured as normally open without an occupancy device connected Description Communicated Reguest Hardwired State Result Standalone NA Open Occupied Occupied Standalone NA Closed Unoccupied Unoccupied Communicating Occupied Open Occupied Occupied Communicating Unoccupied Open Occupied Unoccupied Communicating Occupied Standby Open Occupied Occupied Standby Communicating Occupied Closed Occupied Standby Occupied Standby Communicating Unoccupied Closed Occupied Standby Unoccupied Com
24. ither a hardwired nor communicated setpoint is present the controller uses the stored default setpoints e Occupied setpoints In the occupied mode the unit attempts to maintain the space temperature at the active occupied heating or cooling setpoint based on the measured space temperature the active setpoint and the proportional integral control algorithm e Occupied standby setpoints In occupied standby mode the controller uses the occupied standby cooling and heating setpoints Because the occupied standby setpoints typically cover a wider range than the occupied setpoints the ZN510 controller reduces the demand for heating and cooling the space Also the outdoor air damper is normally closed during occupied standby mode to further reduce the heating and cooling demands Unoccupied setpoints In unoccupied mode the unit attempts to maintain the space temperature at the stored unoc cupied heating or cooling setpoint based on the measured 13 space temperature the active setpoint and the proportional integral control algorithm regardless of the presence of a hardwired or communicated setpoint Once a valid setpoint is established through the hardwired input or through communication and when neither a local setpoint or communicated setpoint is present the controller generates a setpoint failure diagnostic When a setpoint failure diagnostic occurs the controller operates using the default hea
25. l ff GEHBO7211JDOA10DLCO10N001100010000000 Order L9A123A A Serial W97H23456 Tagging WSHP 1 1 NID 01 001C 7B DB 00 Location ID Conference Room 101 Trane Waco TX 76714 NID 01 00 1C 7B DB 00 Serial W97H23456 Figure 1 Unit Identification Tag Note Fold and tear carefully along dashed removable line Location Conference Room 101 Unit Operation General Information The ZN510 controller is a microprocessor based direct digital controller that controls a variety of water source heat pump eguipment including e Standard efficiency horizontal and vertical units up to 10 tons e High efficiency horizontal and vertical units 20 POLE TERMINAL STRIP FACTORY INSTALLED SEE WIRING DIAGRAM FOR HOOKUP Figure 2 Communication connections i Communication The ZN510 controller communicates via Trane s Commb5 protocol Typically a communication link is applied between unit controllers and a building automation system Communication is also possible with Trane s service tool Rover ZN510 provides a total of six 1 4 inch guick connect terminals for connection to the Comm5 communication link These connections include Two terminals TB2 1 TB2 2 e Console water source heat pumps ZN510 is designed to provide accurate and reliable zone temperature control by using custom proportional integral Pl algorithms The controller is factory installed and configured to support
26. leaving water temperature sensor to protect refrigerant circuit 1 and a binary low temperature detection device to protect refrigerant circuit 2 Each individual refrigerant circuit is disabled when the low temperature condition exists for that circuit For two compressor units the controller responds to low temperature detection by allowing the fan to operate while disabling the compressor for the faulty circuit The compressor for the normal circuit continues to operate The Table 3 ZN510 response to low temperature detection diagnostic Saar Fan z Damper Description Operation Compressor Operation Operation Low Temperature Detection Enabled Circuit 1 Disabled Normal Circuit 1 Circuit 2 Normal Operation operation Low Temperature Detection Enabled Circuit 1 Normal Operation Normal Circuit 2 Circuit 2 Disabled operation Low Temperature Detection z Circuit 1 Disabled Circuits 1 and 2 Disabled Circuit 2 Disabled closed Note outdoor air damper also operates normally All unit operation is disabled when the heat pump shuts down both circuits due to low temperature conditions See Table 3 for more information e The low temperature detection device automatically resets when the heat exchanger temperature returns to normal However you must manually reset the low temperature detection diagnostic to clear the diagnostic and restart the unit Refer to page 28 on how to reset a unit e
27. led Damper Disabled High low pressure cutout and low temperature detection diagnostics for heat pump configurations isolate each circuit and independently disable compressor operation For single compressor units these diagnostics cause the compressor to shut down the unit fan to be controlled off and the outdoor air damper to be closed when present When BOP 6 is configured as a generic binary output BOP 6 s state is unaffected by all unit diagnostics Note Non latching diagnostics automatically reset when the input is present and valid 27 Translating Multiple Diagnostics The controller senses and records each diagnostic independently of the diagnostics It is possible to have multiple diagnostics present simultaneously The diagnostics are reported in the order they occur Resetting Diagnostics 1 Automatically by the controller 2 By initiating a manual output test at the controller 3 By cycling power to the controller 4 Through a building automation system such as ZN510 Loop Controller 5 Through Rover Trane s service tool 6 Through any communicating device with the ability to access the controller s alarm reset input Automatic Diagnostic Reset The ZN510 controller includes an automatic diagnostic reset function This function attempts to automatically recover a unit when the following diagnostics occur e Low temperature detection Circuit 1 e Low temperature detec
28. led ancil lary devices is not available from the board It must be tapped at trans former See Table 21 for excess power available Binary Outputs The ZN510 uses five of its binary outputs to control heat pump units Outputs are load side switching triacs The triac acts as a switch by either making or breaking the circuit between the load reversing valve damper contactor relay and ground See Figure 5 for the configuration of the five binary outputs 2 Position Damper Actuator or Generic Binary Output Binary output 6 BOP 6 is factory configured to control a normally closed 2 position outdoor air damper It may be field modified to control a generic output for control by a building automation system If set up as a generic output the controller does not use BOP 6 as part of the normal control A building automation system must issue commands to control the generic binary output Note e During occupied mode the outdoor air damper is closed when the fan is controlled off During unoccupied mode the outdoor air damper normally remains closed 2 position damper must not exceed 10 VA power output from board Unit Operation Factory Supplied Transformer Line Voltage 24VAC as sg B Figure 4 Power Connections Field installed 2 position 24VAC 1TB1 17 OP 6 Compressor 2 BOP 3 Not available BOP 4 Not Used BOP 5 Compressor 1 BOP 1 Fan Bina
29. mands The controller uses the unit capacity and pulse width modulation PWM logic along with minimum on off timers to determine the operation for compressor 1 With a dual compressor unit if the desired conditions are not met by Table 7 Heat pump heating or cooling operation controlling only the first compressor the controller runs compressor 1 continuously and controls compressor 2 according to PWM logic along with the minimum on off timers See Table 6 for heat pump heating or cooling operation Capacity Unit 0 Between O and 50 Between 50 and 100 100 Single compressor i continuously Compressor OFF decreases Compressor output is controlled according to pulse width modulation PWM logic between 0 and 100 The controller calculates the compressor on off times based on PWM logic and heating cooling capacities The compressor is controlled on for longer periods as the capacity increases and shorter periods as the capacity Compressor ON continuously Dual Two compressors Both compressors OFF continuously 1 ON PWM 2 OFF continuously 1 ON continuously 2 ON PWM Both compressors ON continuously Note No diagnostics present Certain heat pump configurations may use one or two compressors for cooling control Heat pumps use reversing valve control to switch between heating and cooling The controller supports cooling only config
30. municating Occupied Standby Closed Occupied Standby Occupied Standby Note If configured for normally closed all states are opposite of Table 4 Generic Binary Input Building automation systems can monitor the status of the generic binary input This input does not affect controller operation High and Low Pressure Switches The high and low pressure cutout switches are wired in series with the compressor contactor in the unit The ZN510 controller detects the state of each switch circuit by monitoring the controller s compressor triac outputs If either the high pressure switch HPC or the low pressure switch LPC switch opens a fault condition occurs This open circuit prevents the compressor contactor from energizing keeping the compressor from running The controller automatically detects the fault condition by measuring the compressor triac output signal By default when the HPC or LPC switches detect a high or low pressure condition in the refrigerant circuit the special input detects the diagnostic and disables all compressor operation for that circuit The unit fan continues to operate if only one circuit is disabled in a two compressor unit When the HPC LPC diagnostic is present on both circuits the ZN510 shuts off the unit fan and disables 11 unit operation See Figure 7 for high and low pressure switch When the refrigerant circuit returns to normal the HPC and the LPC
31. nary input associates an input signal of 0 VAC with open contacts and 24 VAC with closed contacts See Figure 6 for typical binary input configurations for the heat pump e Force compressor operation allowing the technician to use refrigerant gauges or other test equipment to verify unit operation manual output test See Troubleshooting section for Green LED and Testing Heat Pump Configurations on page 21 amp 22 The test sequence resets unit diagnostics and attempts to restore normal unit operation prior to testing the outputs If the diagnostics remains after a reset the status LED indicates the diagnostic condition is still present and has affected the ZN510 does not use analog outputs Low Temperature Detection Circuit 2 Condensate Overflow Binary Inputs Field Wired Occupancy Input Figure 6 Binary inputs Table 2 Binary input configurations Binan Inoue Descrintion Configuratio Contact Contact erase P n Closure Open Low Temperature Normally gt BM Detection Cir 2 closed Normal Diagnostic Bl2 Condensate Overflow Normally Normal Diagnostic closed Bl3 Occupancy Normally open Unoccupied _ Occupied Generic Normally open Normal Normal Note See Page 10 for specific information concerning Bl 1 Bl 2 and Bl 3 9 Unit Operation Low Temperature Detection The low temperature detection diagnostic protects the heat exchanger by using an analog
32. nication jack Vertical case with Trane logo ADJUSTABLE RTI ZONE lt 10K OHM 25 C 2 C SIGNAL COMMON lt 2 T 200 LV SV ist G SETPOINT COMM HIGH X4 COMM LOW GS Mit JACK COMMUNICATIONS GP mr Part Number X13510606010 Description Space temperature 0 2 C resolution External setpoint Communication jack Vertical case with Trane logo ADJUSTABLE SETPOINT RTI ZONE lt 10K OHM 25 C 2 20 SIGNAL COMMON lt 2 VRI 200 N VA CSP 3 COMM HIGH r gt a COMM LOW Xs M JACK 1 COMMUNICATIONS mwr 16 Zone Sensor Specifications Part Number X13510606020 Description Space temperature 0 2 C resolution External setpoint ON and CANCEL buttons Communication jack Vertical case with Trane logo mwr CANCEL Part Number X13510635010 Description Space temperature 0 2 C resolution External setpoint Fan Switch OFF and AUTO ON and CANCEL buttons Communication jack Vertical case with Trane logo mj 17 Heating or Cooling Control Mode Operation Heating or Cooling Operation For both single and dual compressor operation the ZN510 controller cycles the compressor s on and off to meet heating or cooling zone de
33. nt low limit 40 F Heating setpoint high limit 115 F Heating setpoint low limit 40 F Thumbwheel set point Enabled Occupied Bypass Timer 120 minutes Leaving Water Temperature Low Limit Unit specific 20 F ground source or 35 F standard The heating and cooling setpoint high and low limits only apply to the occupied and occupied standby setpoints These limits never apply to the unoccupied setpoints The occupied bypass time is used for timed override applications The timed override timer is maintained in the unit controller When the timed override is applicable the controller reports Occupied Bypass as its effective occupancy mode Location Identifier Unit specific maximum of 30 characters BOP 2 BI1 Not used on cooling only units BOP 5 Not used on signal compressor unit Configured but not required t Optional model number dependent 21 The leaving water temperature low limit is used for freeze protection of circuit 1 on heat pumps Circuit 2 is protected by a binary low temperature detection device freezestat with a fixed trip point Troubleshooting Red Service LED Table 9 Red LED activity Red LED Activity Description LED off continuously when power is applied to the Normal operation controller LED on continuously even when power is applied to Someone is pressing the service button or the controller has the controller failed U
34. ommunicated space temperatureis present the ZN510 controller generates a space temperature failure diagnostic Note The ZN510 controller cannot oper ate without a valid space tempera ture value either hardwired or communicated The space temperature input can communicate timed override ON or CANCEL requests to the ZN510 controller If the ON button is temporarily pressed the zone sensor sends a signal to the controller This signal is then interpreted as a timer override request which places the unit into occupied The controller uses the timed override request while the zone is unoccupied as a request to switch to the Occupied Bypass mode occupied bypass This Occupied Bypass mode lasts for the duration of the occupied bypass time typically 120 minutes or The controller s Occupancy mode is determined from either a system level controller or another peer controller The CANCEL button cancels the timed override request and returned the unit to unoccupied mode If the CANCEL button is temporarily Unit Operation pressed the zone sensor sends a signal to the controller This signal is then interpreted as a timed override cancel which places the unit into unoccupied Local Setpoint The local setpoint analog input is designed as the local hardwired setpoint input This input cannot be used for any other function The local input is a resistance input intended for use with Trane zone sensors If ne
35. open or close the controller generates a Leaving Water Temp Failure diagnostic This disables unit operation Note A low temperature detection failure diagnostic for compressor 1 may require you to manually reset the unit to restore compressor opera tion Similarly the ZN510 controller uses a binary low temperature detection device fixed low limit trip point to lock out circuit 2 when a fault condi tion is detected 14 See the Diagnostics section on page 28 for information about the automatic diagnostic reset function Filter Maintenance Timer The controller s filter maintenance timer is based on the unit fan s cumulative run hours The controller compares the fan run time against an adjustable fan run hours limit maintenance required setpoint time stored in the controller and recommends unit maintenance i e changing the filter Use Rover or BAS system to edit the maintenance required setpoint time Once the setpoint limit is exceeded the controller generates a filter maintenance timer diagnostic When the maintenance required setpoint time is zero the controller disables the diagnostic feature Discharge Air Temperature Analog input 2 Al 2 is used as the discharge air temperature input for use with a 10 000 ohm thermistor Typical factory placement of the thermistor is at the discharge area of the unit The discharge air temperature sensor does not affect unit operation The measured temperatur
36. pancy mode and fan status Normally the outdoor air damper is open during occupied mode when the fan is running and closed during unoccupied mode Refer to the outdoor air damper section on page 8 Manual output test The controller includes a manual output test sequence that may be used to verify output operation and associated output wiring However based on the current step in the test sequence the outdoor air damper may not open Refer to the manual output overrides on page 9 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 device the outdoor air damper may not work correctly Unit wiring The wiring between the controller outputs and the compressor contacts must be present and correct for normal damper operation 25 Ouestionable Unit Operation Troubleshooting Table 16 Outdoor air damper stays closed Probable Cause Explanation Normal operation The controller opens and closes the outdoor air damper based on the controller s occupancy mode and fan status Normally the outdoor air damper is open during occupied mode when the fan is running and closed during unoccupied mode Refer to the outdoor air damper section on page 8 Warm up and cool down The controller includes both a morning warm up and cool down sequence to keep the outdoor air damper
37. part of the morning warm up seguence Master Controller ZN510 can send or receive data such as setpoint heat cool mode fan reguest and space temperature to and from other controllers on the communication link with or without a building automation system This includes applications where multiple unit controllers share a common space temperature sensor both for standalone and building automation applications The master controller the unit controller with the hardwired zone sensor in peer to peer communication can send its zone temperature to one or more slave controllers which allows the slave controllers to track each other s zone temperature For these applications Rover is used in set up of the controller See Figure 9 for Master Slave setpoint operation for peer to peer set up Setpoint Operation Controllers sharing information peer to peer can share a variety of data including the heating cooling setpoint communicated from a master to a slave The standalone master controller derives its setpoint from either the local hardwired setpoint input or from its default setpoints Peer to peer applications often reguire the use of one hardwired setpoint to be shared across two or more controllers This can be achieved by wiring the adjustable setpoint typically included as a part of the Trane zone sensor module to the controller defined as the master Trane s service tool Rover may be used to set up the ma
38. put Depending on the state of the communicated request the unit may disable the compressor Manual output test The controller includes a manual output test sequence that may be used to verify output operation and associated output wiring However based on the current step in the test sequence the compressor s may not be on Refer to the manual output overrides on page 9 Diagnostic present A specific list o f diagnostics affects compressor operation depending whether the unit is configured as heat pump For more information see the Diagnostics section on page 27 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 device the compressor may not work correctly No power to the controller If the controller does not have power the compressor does not operate For the ZN510 controller to operate normally a voltage input of 24 VAC must be applied When the green LED is off continuously the controller does not have sufficient power or has failed Unit wiring The wiring between the controller outputs and the compressor contacts must be present and correct for normal compressor operation Table 15 Outdoor air damper stays open Probable Cause Explanation Normal operation The controller opens and closes the outdoor air damper based on the controller s occu
39. r 10 seconds Wink mode is sent from Comfort Link Controller e Power off LED off e Abnormal condition e Test button is pressed Yellow Service LED Table 11 Yellow LED activity Yellow LED Activity Description The controller is not detecting any communication PEP OF ante Normal for standalone applications The controller detects communication normal for BEE Pinks communicating applications including data sharing LED on continuously Abnormal condition 22 Troubleshooting Manual Output Testing the Heat for at least three seconds to 3 Press the Test button several Pump Configurations start the test mode more times no more than once The procedure for testing heat pump per second to advance through WN 2 The test seguence resets configurations is the test sequence diagnostics and turns off all 1 Press and hold the Test button outputs Table 12 Test sequence Ste Fan Reversing Valve Compr 1 Compr 2 Damper 8 BOP 1 BOP 2 BOP4 BOP5 BOP 6 1 Off Off Off Off Off Closed 2 Fan on At the beginning of step 2 the On off Off Off Closed controller attempts to clear all diagnostics 3 Reversing Valve On On Off off Closed 4 Cool 1 On On On off Closed 5 Cool 2 On On On On Closed 6 Compressor s off This stage helps avoid compressor cooling and heating in sequential steps by turning the On Off Off Off Closed
40. rating Environment 32 to 140 F 0 to 60 C 5 to 95 non condensing A Hardware Specifications Storage Environment 40 to 185 F 40 to 85 C 5 to 95 non condensing Power Requirements 18 to 32 VAC 24 VAC nominal 50 or 60 Hz 300 mA Agency Listings UL and CUL 916 Energy Management System Agency Compliance IEC 1000 4 2 ESD IEC 1000 4 4 EFT IEC 1000 4 5 Surge FCC Part 15 Class A Input Output Summary e Three binary inputs e Six binary outputs only five are used Five analog inputs Timed override ON and CANCEL Comm5 communication Heat sink is mounted to the top of the control box ZN510 Actual Size 4 0 x5 5 Dre COMMMUNICATION coum comum comm L 5 1 2 BINARY OUTPUTS ComfortLink tm 10 12 34 56 78 9A BC NID STATUS BEE SENSOR _ m FEF Figure 10 ZN510 Circuit Board 31 Hardware Specifications Table 18 Binary Inputs Description Terminals Function Binary Input 1 J2 1 24 VAC J2 2 Input Binary Input 2 J2 3 24 VAC J2 4 Input Binary Input 3 J2 5 24 VAC J2 6 Input Table 19 Binary Outputs Description Terminals Sup us Load Energized Load De energized Rating Binary Output 1 J1 1 12 VA 1 VAC RMS typical 24 VAC RMS typical Binary Output 2 J1 2 12 VA 1 VAC RMS typical 24 VAC RMS typical Binary Output3 J1 4 NOT USED Binary Output 4 J1 5 1
41. ry Outputs Figure 5 Binary outputs Table 1 BOP 6 control of a 2 position outdoor air damper Model Fan Operation Outdoor Air Damper On or cycling Open Occupied Off Closed Occupied war uor On or cycling Closed cool down Occupied standby On or cycling Closed Unoccupied Cycling Closed Diagnostic present Diagnostic dependent Closed damper actuator Unit Operation Output Overrides The ZN510 controller includes a manual outputtest function Use this feature to manually exercise the outputs in a defined seguence The purpose of the test seguence is to verify output and end device operation Use the manual output test to e Verify output wiring and operation without using Trane s service tool Rover Analog Outputs Binary Inputs The ZN510 controller has three available binary inputs Bl These inputs are factory configured for the following functions Bl 1 Low temperature detection freezestat Circuit 2 e BI 2 Condensate overflow e BI 3 Occupancy or generic binary input Each binary input may be configured as not used depending on options selected BI 3 is configured as a normally open occupancy input but may be field modified for generic binary input which is only supported by a build ing automation system Note The diagnostic functions related to binary inputs such as low tempera ture detection and condensate overflow are fixed sequences Each bi
42. se Rover Trane s service tool to restore the unit to normal LED flashes once every second operation or unconfigured IWarning Service Button The black Service button on the ZN510 board allows the user to send a service pin message which allows efficient identification of the unit s location However if the Service button is held for more than 10 seconds the ZN510 will shut down the software application and disable the unit s operation The only method to restore the unit is through the use of Rover service tool We strongly suggest that this function only be exercised under the strict direction of factory service personnel Green Status LED The green LED normally indicates Table 10 Green LED activity whether the controller is powered on 24 VAC Green LED Activity Description LED on continuously Power on normal operation Manual output test mode 2 second hold No LED blinks one blink diagnostics present Manual output test mode 2 second hold BED blinks PAVO OIS One or more diagnostics are present Wink mode This feature allows the identification of a controller By sending a request from a device such as Rover Trane s service tool or ZN510 LED blinks 1 4 second on Loop Controller a request to the controller 1 4 second off for 10 seconds can be made to wink a notification that the controller received the signal When the zone sensor ON button is held fo
43. ster and one or more slaves to share that setpoint For this application each communicating controller uses the same setpoint Data Sharing Master Controller Communication Link c Zone Sensor Figure 9 Master slave setpoint operation for peer to peer setup Note Each controller derives it s effective setpoint and default setpoints including deadbands between set points from the setpoint input hardwired or communicatea To make sure the peer to peer setpoint application results in identical set points for each communicating con troller each controller must have exactly the same default setpoints Simplified Peer to Peer Master Slave Setup To simplify setting up master slave applications the controller provides information that groups all necessary shared data into one communication variable This master slave variable includes the following information e Space temperature e Setpoint 20 e Heating cooling mode e Occupancy e Fan status Unit control algorithm capacity This information is communicated from the master to the slave to ensure similar unit operation Use Rover Trane s service tool to set up peer to peer applications Refer to the Rover product literature for more information on setting up applications Configurable Parameters Rover Trane s service tool uses the unit type heat pump to determine and download unit con
44. t Nr DISCHARGE AIR 33a m 5 2 T 42A gt SENSOR 4 32 5 7 3 53 Pi 3 4RT1 3 43A o uu 2 COMM LINK ZONE SENSOR LEAVING WATER x gt TMM 7 z M ssa bd SENSOR he ls i CIRCUIT 1 ME d ZONE GND SET FAN GND FAN MODE 24A 1m4 SET POINT 25A 10 3 ANE NER COMMON 22A 1m1 2 CONNECTIONS ZONE TEMP ZA 1m COMM 28A 1m s COMMUNICATIONS COMM 25A 1mi 5 ZONE SENSOR COMM 18A 11 16 COMMUNICATIONS COMM 19A 1m1 14 LINK 29 Wiring Diagram noo NWARNING A AVERTISSEMENT Git LINE VOLTAGE HAZARDOUS VOLTAGE VOLTAGE HASARDEUX yo air DISCONNECT ALL ELECTRIC POWER DECONNECTEZ TOUTES LES SOURCES PAE INCLUDING REMOTE DISCONNECTS ELECTRIQUES INCLUANT LES ELA BEFORE SERVICING DISJONCTEURS SITUES A DISTANCI If fi FAILURE TO DISCONNECT POWER AVANT D EFFECTUER L ENTRETIEN in A l BEFORE SERVICING CAN CAUSE FAUTE DE DECONNECTER LA SOURCE LY yl SEVERE PERSONAL INJURY R ELECTRIQUE AVANT D EFFE CTUER DEATH LENTRETIEN PEUT ENTRAINER DES BLESSURES CORPORELLES SEVERES OU LA MORT IMPORTANT USE COPPER CONDUCTORS ONLY TO PREVENT EQUIPMENT DAMAGE UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT ANY OTHER WIRING HE EFE erat
45. t observed After power up the controller always observes a random start from 0 to 25 seconds The controller remains off until the random start time expires Power up control wait When power up control wait is enabled non zero time the controller remains off until one of two conditions occurs e The controller exits power up control wait once it receives commu nicated information e The controller exits power up control wait once the power up control wait time expires Cycling fan operation When configured to cycle with capacity normally the unit fan cycles off with heating or cooling The heating cooling sources cycle on or off periodically with the unit fan to provide varying amounts of capacity to the space Unoccupied operation Even when the controller is configured for continuous fan operation the fan normally cycles with capacity during unoccupied mode While unoccupied the fan cycles on or off with heating cooling to provide varying amounts of heating or cooling to the space Fan mode off When a local fan mode switch determines the fan operation the off position controls the unit fan off Requested mode off The desired operating mode such as off heat and cool can be communicated to the controller When off is communicated to the controller the unit controls the fan off There is no heating or cooling Diagnostic present A specific list of diagnostics affects fan operation See
46. ting and cooling setpoints These setpoints are factory configured but may be changed using the Trane service tool Rover The ZN510 controller uses the following validation sequence for the setpoints 1 Check for a communicated setpoint If present validate this setpoint 2 Check for a hardwired setpoint and validate the setpoint 3 Use the default setpoint and validate this setpoint Fan Mode Input The fan mode analog input Fan is designed to operate as the fan mode switch input This input cannot be used for any other function The fan switch on a Trane zone sensor generates the fan mode signal The ZN510 controller detects the unique resistance corresponding to each position of the fan switch By measuring the resistance the controller determines the requested fan mode Possible Fan Modes Heat Pump 1 speed OFF Fan Off Continuous Field Modified n occupied mode the fan runs continuously In unoccupied mode the fan cycles OFF when no heating or cooling is reguired AUTO Cycling Factory Default The fan cycles ON and OFF with compressor operation AUTO The ZN510 controller receives the fan mode from either a wired zone sensor or as a communicated valve When neither a zone sensor nor communicated fan mode are present the ZN510 controller will default unit operation to AUTO Note A building automation system can also generate a fan mod
47. tion Circuit 2 e Low temperature detection Circuit 1 and 2 High low pressure cutout Circuit 1 High low pressure cutout Circuit 2 Diagnostics High low pressure cutout Circuit 1 and 2 When one or more of these special diagnostics occurs the controller responds to the diagnostic as defined in the table 17 on page 27 After the controller detects the first special diagnostic listed on page 27 the unit waits 30 minutes before invoking the automatic diagnostic reset function The automatic diagnostic reset function clears all special diagnostics and attempts to restore the controller to normal operation The controller resumes normal operation until another diagnostic occurs If a special diagnostic occurs within 24 hours after an automatic diagnostic reset the diagnostic must be manually reset Cycling Power When the 24 VAC power to the controller has been turned off the unit cycles through a power up sequence By default the controller attempts to reset all diagnostics at power up Diagnostics present at power up and those that occur after power up are handled according to the table on page 27 Building Automation System CLC Some building automation systems can reset diagnostics in the ZN510 controller The ZN510 Loop Controller can reset diagnostics in the ZN510 Controller For complete information refer to the building automation system product literature 28 Rover Service Tool
48. urations and heat pump configurations For heat pump configurations the unit s reversing valve is energized in cooling and de energized in heating For cooling the reversing valve output is energized simultaneously with the compressor compressor 1 in two compressor applications The reversing valve remains energized until the controller turns on the compressor for heating simultaneously de energizing the reversing valve The reversing valve only changes state when the controller turns on compressor 1 When a power failure occurs the reversing valve output defaults to the heating de energized state To reduce noise due to refrigeration migration after compressor shutdown the controller does not immediately operate the reversing valve The reversing valve changes state only when the compressor controls on except when the controller is in off mode For cooling only configurations no reversing valve is present and the 18 controller uses the compressor stages for cooling Compressor Minimum ON OFF Timers e When fan mode OFF Com pressor minimum ON timers are ignored When fan mode AUTO Com pressor minimum OFF timers are observed e The diagnostic reset ignores the compressor timers ON and OFF A communicated compressor disabled or unoccupied signal ignores minimum ON times Other Modes Occupancy Operation Unoccupied operation normally is associated with evening hours when the space is
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