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Trane ZN510 Controller manual

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Table of contents for the manual

  • Page 1

    WSHP-IOP-2 May 1998 Installation, Operation, and Programming Tracer™ ZN510 Controller[...]

  • Page 2

    Literature History © 1998, American Standard Company Installation, Operation, and Programming WSHP -IOP -2 Library Se rvice Literature Product S ection Unitary Product W ater -S ource He at P umps Model 000 Literature T ype Installation, Operation, and Pr ogramming Seq ue nc e 1 Date Apri l 1 998 File No. SL -UN-0 0 0-WSHP -IOP -2-0498 Supersedes [...]

  • Page 3

    Table of Contents Star t-up P r ocedure 4 P o w er -up Seq uence 5 Unit Identif ication T ag 6 Unit Operation 7 General Inf ormation 7 Communication 7 Pow e r 8 Binary Outputs 8 Analog Outputs 9 Binary Inputs 9 Analog Inputs 12 Zone Sensors 1 5 Heating or Cooling Contro l Mode Operation 18 Single or Dual Compressor Operation 19 Data Sharing 20 Conf[...]

  • Page 4

    4 Start-up Procedure Installation of Ne w Units 1. Fol low all instruction for installation of water source heat pumps as de tailed in the IOM (Installation Operation Maintenance manu al). 2. Disconnect power or disable the circuit breaker to unit. 3. Run co mmunication link wi re to field terminal strip s 1 4 and 1 6. (See wiring diagram in the un[...]

  • Page 5

    5 Power Up Sequence P ower Up S equence When 24 VAC power initiall y is applied to the ZN5 10 controller, the following sequence occurs: 1. All outputs are control led of f . 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, t he control[...]

  • Page 6

    6 Unit Identification Tag Unit Identification T ag The unit identificati on tag is factory mounted and pr ovided for easy identification of an instal led unit. It contains model numb er, tagging, and location informat ion. See Figure 1 . The top portion of the unit identification tag remains permanently affixed to the uni t for identity purposes. T[...]

  • Page 7

    7 General Information The ZN510 controller is a microprocessor-based direct digital controller that controls a variety of water source heat pump equipm ent including: z Standard efficien cy horizontal and vertical units up to 10 ton s. z High efficiency horizontal and vertical units. z Console water source heat pumps. ZN510 is designed to provide a[...]

  • Page 8

    8 Pow e r The ZN510 contro ller is powered by 24 VAC . A total of two 1/4-inch quick- connect terminals are provided for 24 VAC connection to th e board. See Figure 4 for ZN510 power requirement. Note: P ower for fiel d installed ancil - lary devices is not availab le from the board. It m ust be tappe d at trans- former . See T able 21 for excess p[...]

  • Page 9

    9 Unit Operation Analog Outputs ZN510 does not use analog outputs. Binary I nputs 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 BI 3 = Occupancy or generic binary input. Eac h bi[...]

  • Page 10

    10 Unit Operation Low T emperatur e Detection The low temperature detection diagnostic protects the he at 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 individu al refrigerant circuit is disabled when the low tempera[...]

  • Page 11

    11 Unit Operation In Occupied mode, th e 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 the unoccupied setpo ints regardless of the state [...]

  • Page 12

    12 Unit Operation 12 4 5 6 7 3 Analog Inputs The ZN510 controller h as five available analog in puts (AI). These inputs are factory-con figured for the following func tions: z Zone = Space temperature. z Set = Local setpoint. z Fan = Fan mode input. z AI 1 = Leaving water tem- perature (Circuit 1). z AI 2 = Discharge air tem- perature. See Figure 8[...]

  • Page 13

    13 Unit Operation Space T e mperature ZN510 controls the space temperature a ccordin g to the ac tive space temperature, the active heating/coolin g setpoint, and th e space temp erature control algorithm. The ZN 510 controller receives the space tem perature from either a wired zone senso r or as a communicated value. When neither a zone sens or n[...]

  • Page 14

    14 The ZN510 controller receives the fan mode from eith er a wired zone sensor or as a co mmunicated valve. When neither a zone sensor nor communicated fan mode are present, the ZN5 10 controller will default unit operatio n to AUTO . Note: z A building automati on system can also generate a fan mode request and commun icate this request to the con[...]

  • Page 15

    15 Zone Sensor Zone Sensor The ZN510 contro ller accepts the following zone sen sor inputs: z Space temp erature mea- surement. z Local setpoint (internal or external on the zo ne sensor). z Fan switch. (Optio nal) z Timed overri de ( ON and CANCEL ). z Communication Jack. If both hardwire d and communicated space temperature values exist, the cont[...]

  • Page 16

    16 Zone Sensor Table 6 : Zone Sensor Options Pa rt N u m be r : X1351 06280 10 Description: z Space temperature (0.2 C resolution). z Internal setpoint. z Communication jack. z Vertical case with Trane logo Pa rt N u m be r : X1351 06060 10 Description: z Space temperature (0.2 C resolution). z External setpoint. z Communication jack. z Vertical ca[...]

  • Page 17

    17 Zone Sensor Speci fications Part N um be r : X1351 0606020 Description: z Space temperature (0.2 C resolution). z External se tpoint. z ON and CANCEL buttons . z Communication jack. z Vertical case with Trane logo. Part N um be r : X 1 3 5 10 6 3 5 010 Description: z Space temperature (0.2 C resolution). z External se tpoint. z Fan Switch ( OFF [...]

  • Page 18

    18 Heating or Cooling Control Mode Operation Heating or Cooling Operation For both single and dual com pressor operation, the ZN 510 controller cycles the compress or(s) on and off to meet heating or coolin g zone demands. The contr oller uses the unit capacity and pul se width modulation (PWM ) logic along w ith minimum on/off timers to determine [...]

  • Page 19

    19 Single and Dual Compressor Operation Other Modes Occupanc y Operation Unoccupied operatio n normally is associated with eve ning h ours when the space is vacant. In unoccupied mode, the control ler always uses the default unoccupied heating an d cooling setpoints stored in the controller. As the unit goes unoccupied, th e compressors ON timers a[...]

  • Page 20

    20 Data Sharing Master Controller ZN510 can send or rece ive data (such as setpoint, heat/cool mode, fan request and space temperature) to and from other co ntrollers on th e communication link, with or without a building automation system. This includes applications where multiple unit co ntrollers share a common space temperature sensor, both for[...]

  • Page 21

    21 Configurable Parameters Rover, Trane’s service tool, uses the unit type “heat pump” to determine and download unit con figuration information, such as the default analog inputs, the default binary inputs, and the default b inary output configurations. See Table 7 for default configurations fo r heat pumps. Table 8 : Heat pump heating or co[...]

  • Page 22

    22 Table 10 : Green L ED activity Green LED Activity Description LED on continuously. Power on (normal operation). LED blinks (one blink). Manual output tes t mode (2-second hol d), No diagnostics present. LED blinks (two blinks ). Manual output tes t mode (2-second hol d), One or more diagnostics are present. LED blinks (1/4 second on, 1/4 second [...]

  • Page 23

    23 Manual Output T esting the Heat Pump Configurations The procedure for testing heat pump configurations i s: 1. Press and hold the T est button for at least three seconds to start the test mode. 2. The test sequ ence resets diagnostics and turns of f all outputs. 3. Press the T est but ton several more times (no mo re than once per second) to adv[...]

  • Page 24

    24 Troubleshooting Questionable Unit Operation Table 13 : Fan output does not energi ze Prob ab le C au se Explanation Random star t observed . After power up, the controller alw a ys ob serves a random star t fro m 0 to 25 seconds. The controller remains off until the random start time expires. Power up control wait. When power up contro l w ait i[...]

  • Page 25

    25 Troubleshooting Questionable Unit Operation Table 14 : Compressor(s) not running Prob ab le C au se Explanation Normal operation. The controller compressor(s) tu rn on and off to meet the unit capacity requirements. Requ ested mode of f. The desired op erating mode (such as of f, heat and cool) can be communicat ed to the controller . W hen of f[...]

  • Page 26

    26 Troubleshooting Questionable Unit Operation Table 16 : Outdoor air damper stays closed Prob ab le C au se Explanation Normal operation. The controller opens an d closes the outdoor air damper based on the controller ’ s occupancy mode and fan status . Normally , the outdoor air damper is open during occu pied mode wh en the fan i s running a n[...]

  • Page 27

    27 Diagnostics Table 17 : ZN510 controller diagnostics Diagnostic Fan Ot her Outputs Condensate overflow Off Com pressors: Off Damper: Closed Low temp detect - Crt 1 Enabled Compressor 1: Of f Compressor 2: See note below. Damper: See note below. Low temp detect - Crt 1 Enabled Compressor 1: See note below. Compressor 2: Of f Damper: See note below[...]

  • Page 28

    28 Diagnostics T ranslating Multiple Diagnostics The controller sens es and record s each diagnostic independen tly of the diagnostics. It is possible to have multiple diagnosti cs present simultaneously. Th e diagnostics are reported in the order they occur. Reset ting Diagnostics 1. Automatically by the controller . 2. By initiating a manual outp[...]

  • Page 29

    29 Wiring Diagram[...]

  • Page 30

    30 Wiring Diagram[...]

  • Page 31

    31 5 1/2” 4” Heat sink is mounted to the top of the control box Hardware Specifications Specifications Operating Environment 32 to 140 F (0 to 60 C) 5 to 95% non-condensi ng Storage Envi ronment -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 E[...]

  • Page 32

    32 Hardware Specifications Table 20 : Analog Inputs Descript ion Te r m i n a l s Function Range Zone T B3-1 Zone temperatu re 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 Ana[...]