Trane ZN510 Controller - Manuals

5 Power UpSequence Power Up Sequence When 24 VAC power initially is applied to the ZN510 controller, the following sequence 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 ...

6 UnitIdentificationTag Unit Identification Tag The unit identification 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 aff...

7 General Information The ZN510 controller is a microprocessor-based direct digital controller that controls a variety of water source heat pump equipment including: z Standard efficiency horizontal and vertical units up to 10 tons. z High efficiency horizontal and vertical units. z Console water so...

8 Power The ZN510 controller is powered by 24 VAC . A total of two 1/4-inch quick- connect terminals are provided for 24 VAC connection to the board. See Figure 4 for ZN510 power requirement. Note: Power for field installed ancil-lary devices is not available from the board. It must be tapped at tra...

9 Unit Operation Analog Outputs ZN510 does not use analog outputs. Binary Inputs The ZN510 controller has three available binary inputs (BI). These inputs are factory-configured for the following functions: z BI 1= Low temperature detection (freezestat) (Circuit 2). z BI 2 = Condensate overflow. z B...

10 Unit Operation Low Temperature Detection The low temperature detection diagnostic protects the heat exchanger by using an analog leaving water temperature sensor to protect refrigerant circuit 1 and a binary low temperature detection device to protect refrigerant circuit 2. Each individual refrig...

11 Unit Operation 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 request, the controller operates according to th...

12 Unit Operation 1 2 4 5 6 7 3 Analog Inputs The ZN510 controller has five available analog inputs (AI). These inputs are factory-configured for the following functions: z Zone = Space temperature. z Set = Local setpoint. z Fan = Fan mode input. z AI 1 = Leaving water tem-perature (Circuit 1). z AI...

14 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: z A building automation system can also generate a fan mode req...

15 Zone Sensor Zone Sensor The ZN510 controller accepts the following zone sensor inputs: z Space temperature mea-surement. z Local setpoint (internal or external on the zone sensor). z Fan switch. (Optional) z Timed override ( ON and CANCEL ). z Communication Jack. If both hardwired and communicate...

16 Zone Sensor Table 6 : Zone Sensor Options Part Number:X13510628010Description: z Space temperature (0.2 C resolution). z Internal setpoint. z Communication jack. z Vertical case with Trane logo Part Number:X13510606010Description: z Space temperature (0.2 Cresolution). z External setpoint. z Comm...

17 Zone Sensor Specifications Part Number:X13510606020Description: z Space temperature (0.2 C resolution). z External setpoint. z ON and CANCEL buttons. z Communication jack. z Vertical case with Trane logo. Part Number:X13510635010Description: z Space temperature (0.2 C resolution). z External setp...

18 Heating or Cooling ControlMode Operation Heating or CoolingOperation For both single and dual compressor operation, the ZN510 controller cycles the compressor(s) on and off to meet heating or cooling zone demands. The controller uses the unit capacity and pulse width modulation (PWM) logic along ...

19 Single and Dual CompressorOperation Other ModesOccupancy Operation Unoccupied operation normally is associated with evening hours when the space is vacant. In unoccupied mode, the controller always uses the default unoccupied heating and cooling setpoints stored in the controller. As the unit goe...

20 Data Sharing Master Controller ZN510 can send or receive data (such as setpoint, heat/cool mode, fan request 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 sha...

21 Configurable Parameters Rover, Trane’s service tool, uses the unit type “heat pump” to determine and download unit configuration 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...

22 Table 10 : Green LED activity Green LED Activity Description LED on continuously. Power on (normal operation). LED blinks (one blink). Manual output test mode (2-second hold), No diagnostics present. LED blinks (two blinks). Manual output test mode (2-second hold), One or more diagnostics are pre...

23 Manual Output Testing the Heat Pump Configurations The procedure for testing heat pump configurations is: 1. Press and hold the Test button for at least three seconds to start the test mode. 2. The test sequence resets diagnostics and turns off all outputs. 3. Press the Test button several more t...

24 Troubleshooting Questionable UnitOperation Table 13 : Fan output does not energize Probable Cause Explanation Random start 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...

25 Troubleshooting Questionable UnitOperation Table 14 : Compressor(s) not running Probable Cause Explanation Normal operation. The controller compressor(s) turn on and off to meet the unit capacity requirements. Requested mode off. The desired operating mode (such as off, heat and cool) can be comm...

26 Troubleshooting Questionable UnitOperation 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 occup...

27 Diagnostics Table 17 : ZN510 controller diagnostics Diagnostic Fan Other Outputs Condensate overflow Off Compressors: OffDamper: Closed Low temp detect - Crt 1 Enabled Compressor 1: OffCompressor 2: See note below.Damper: See note below. Low temp detect - Crt 1 Enabled Compressor 1: See note belo...

28 Diagnostics 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 ...

31 5 1/2” 4” Heat sink is mounted to the topof the control box HardwareSpecifications Specifications Operating Environment 32 to 140 F (0 to 60 C)5 to 95% non-condensing Storage Environment-40 to 185 F (-40 to 85 C) 5 to 95% non-condensingPower Requirements18 to 32 VAC (24 VAC nominal)50 or 60 Hz300...