Trane VUV Installation, Operation And Maintenance Manual
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Trane VUV Installation, Operation And Maintenance Manual

Trane VUV Installation, Operation And Maintenance Manual

Vertical classroom unit ventilator
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Installation, Operation, and Maintenance
Vertical Classroom Unit Ventilator
Model VUV
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.
June 2023
SAFETY WARNING
UV-SVX005G-EN

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  • Page 1 Installation, Operation, and Maintenance Vertical Classroom Unit Ventilator Model VUV SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
  • Page 2 When working with or around hazardous chemicals, these compounds have the same potential impact to the ALWAYS refer to the appropriate SDS and OSHA/GHS environment. Trane advocates the responsible handling of all (Global Harmonized System of Classification and refrigerants. Labeling of Chemicals) guidelines for information on...
  • Page 3 Copyright This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

  • Page 4: Table Of Contents

    Table of Contents Model Number Descriptions Installation and Initial Setup ....57 ....5 Adjustments .

  • Page 5: Model Number Descriptions

    Model Number Descriptions Digits 1, 2, 3 — Unit Model Digit 15 — Cooling/Changeover Coil Digit 20 — Cv Cooling/Changeover Valve VUV= Vertical Unit Ventilator No cooling/changeover coil 2-row low capacity cooling/ None Digit 4 — Development Sequence changeover coil 2-way 2.3 Cv...
  • Page 6 Model Number Descriptions Digit 26 — Controls Digit 33 — End Covers Digit 41 — Filter Customer supplied terminal No decorative end covers Standard throwaway filter interface (CSTI) 16.63 in. depth without cutout Merv 8 filter CSTI with low temperature 16.63 in.

  • Page 7: General Information

    HVAC mechanical systems. The only thing consistent about today’s classroom is its ability to constantly change. With this in mind, Trane’s classroom unit ventilator is designed to support today’s changing environment. Its blow-thru design provides freeze protection, sound attenuation, and safety.

  • Page 8: Operating Environment

    The outside air/return air damper is a one piece, linkage free design resulting in a superior air-tight seal. Control Options Trane unit ventilators are available with a variety of control options, including factory-mounted controls and customer- supplied terminal interface (CSTI).

  • Page 9: Pre-Installation

     Notify your Trane sales representative of the damage and arrange for repair. Do not attempt to repair the unit without consulting the Trane representative.

  • Page 10: Jobsite Storage

    (mold). If there is If indoor storage is not possible, Trane makes the following evidence of microbial growth on the interior insulation, recommendations to prevent damage:...

  • Page 11: Dimensions And Weights

    Dimensions and Weights Service Clearances Attention should be given to service clearance and technician safety. The unit should contain enough space for service personnel to perform maintenance or repair. Provide sufficient room to make water, and electrical connection(s). A 36-inch clearance at the unit front is sufficient for maintenance and service of the equipment.

  • Page 12: Component Data

    Dimensions and Weights Component Data Table 1. Vertical unit ventilator general data Unit size Description 0750 1000 1250 1500 Unit length without end covers (in.) 69.00 81.00 93.00 105.00 Unit depth - standard (in.) 16 5/8 16 5/8 16 5/8 16 5/8 Unit depth - with false back (in.) 21 1/4...
  • Page 13 Dimensions and Weights Figure 3. Standard depth unit (4) K.O. for piping or electrical 16 5/8 in. 2 3/8 in. Pipe 5 3/4 in. chase 30 in. 7/8-in. OD 7/8 in. OD 5 in. drain connection auxiliary 22 5/8 in. drain connection (optional) 12 1/2 in.
  • Page 14 Dimensions and Weights Figure 4. Falseback unit 21 1/4 in. 16 5/8 in. 2 3/8 in. (4) K.O. for piping Pipe 5 3/4 in. or electrical 7/8-in. O.D. chase drain connection 30 in. 7/8-in. O.D. 5 in. auxiliary drain connection 22 5/8 in.
  • Page 15 Dimensions and Weights Figure 5. Dynamic air barrier unit (4) K.O. for piping or electrical 21 1/4 in. 16 5/8 in. 2 3/8 in. Pipe 5 3/4 in. chase 30 in. 5 in. 7/8-in. O.D. drain connection 7/8-in. O.D. auxiliary Return air opening 22 5/8 in.
  • Page 16 Dimensions and Weights Figure 6. End covers 5/8 in. 21 1/4 in. 16 5/8 in. 30 in. 2 1/2 in. 2 1/4 in. End covers without cutouts 5/8 in. 21 1/4 in. 16 5/8 in. 2 in. 7 1/4 in. 30 in.
  • Page 17 Dimensions and Weights Figure 7. Wall boxes - V1 and V3 2 1/8 in. 10 3/8 in. 1-in. flange 2 3/8 in. Weep holes Weep holes 10 3/8 in. V1-Vertical louver V3-Vertical louver with 1-inch recessing flange Table 7. V1 and V3 Wall box dimensions (inches) Unit size Free Area (ft 42 1/8...
  • Page 18 Note: 1-3/8 in. OD and 2-1/8 in. ID crossover piping 1. Crossover piping is available for all 2- or 4-pipe coils selections. Trane provides the crossover for the hot water only. The crossover pipe is factory insulated with 3/8 in.- thick insulation.

  • Page 19: Installation - Mechanical

    General Instructions Unit Leveling! The unit must be installed level (zero tolerance) in both For Trane wall box, dimensions are actual, and may be used horizontal axis for proper operation. Do not use the coil to define the wall opening.

  • Page 20: Installing The Unit

    Installation - Mechanical Installation in Masonry Walls Figure 11. Flanged wall box installation in 2-in. curtain wall A typical method of installing the wall box in a masonry wall opening is shown below. Interior wall with sheetrock Figure 10. Masonry wall installation Outside Interior wall wall...
  • Page 21 Installation - Mechanical Table 9. Mounting hole locations (inches) Unit size Type Standard unit (no falseback) 1.31 13.50 2.75 66.39 10.38 45.64 Standard falseback 1.00 2.13 26.00 67.00 10.00 47.00 29 in. stepdown falseback 1.00 2.13 24.44 67.00 10.00 47.00 28 in.
  • Page 22 Installation - Mechanical Note: Hex screws and lock washers are provided by the factory. They are located in a baggy and are used to attach the base to the unit ventilator. Pre-drilled slots in the subbase flange will line up with the weld nuts in the bottom of the unit.

  • Page 23: Coil Piping And Connections

    Coil Piping and Connections Piping Packages The coil headers and drain connections are made within the unit chassis to allow a tight seal and help prevent air leakage around the coil. The connection sizes vary dependent upon Before installation of piping package, the shipping bracket type of coil combination specified.
  • Page 24 Coil Piping and Connections Figure 14. Basic piping package BASIC 2-WAY 3-WAY 3-way main or 2-way main or auxilliary auxilliary water valve Union water valve Union Ball valve Return connection Ball valve Ball valve Supply Supply connection connection Ball valve Union Union Return...
  • Page 25 Coil Piping and Connections All union connections should be tightened in the field. Units are Note: Instructions for using this chart appear on the shipped with union connections hand tightened only in the preceding page. For the manual circuit setter provided factory.

  • Page 26: Balancing Manual Circuit Setter Valve

    Factory insulation is provided on all crossover piping. When a Trane piping package is ordered, it is installed with the connections made to the supply and return of both the coil and the crossover piping. However, supply and return connections must be made in the field when a piping package is furnished by the installer.

  • Page 27: Split System Piping

    Table 10, p. 23. Typical Superheat Charging Charts are shown in the Trane Service Facts found in the condensing unit section manual. Refrigerant charge weights can also be determined with your local Trane sales engineer using a valid Trane Selection Program.
  • Page 28 Coil Piping and Connections Figure 22. Steam valve orientation Figure 24. Wiring for modulating steam valve actuator 0° to 45° Note: The actuator must be removed when soldering near the valve. High heat may cause damage to the actuator’s plastic body/mechanisms. The actuator can be removed from the valve by loosening the bolt going through the top of the actuator.

  • Page 29: Installation - Controls

    Installation - Controls Control Options The fan speed control is available for units that do not have Trane factory-mounted control packages. This variable fan speed option is low-voltage and has three 24-volt relays using Available control options are: a factory-wired transformer and relays to control the fan motor.
  • Page 30 Installation - Controls Customer Supplied Terminal Interface voltage terminal block and are run-tested, so the only a power connection and thermostat connection is needed to (CSTI) commission the unit. The control interface is intended to be used with a field- Entering water temperature sensor is factory mounted on the supplied, low-voltage thermostat or controller.
  • Page 31 – A 10K NTC thermistor (similar to Trane part number valves to be used with simple thermostats that do not have the X13790374010) is wired properly to the motor control configurability to adapt to the customer choice of valves.
  • Page 32 In this case, “hot” water is determined if: – The input impedance of the thermistor circuit must be Aipu – A 10K NTC thermistor (similar to Trane part number set correctly (the parameter should be set to X13790374010) is wired properly to the motor control for CSTI units).

  • Page 33: Thermostat

    Installation - Controls Thermostat The thermostat is a wall-mounted, field-installed option. It can provide three-speed control. Thermostat Installation Figure 29. Thermostat terminal block 1. 24 Vac 2. N 10 9 8 7 6 5 4 3 2 1 3. Fan High 4.

  • Page 34: Tracer® Zn520 Controller

    Do not mount the thermostat on an outside wall, in • For situations when a non-Trane BAS is present, the direct sunlight, behind a door, or in an area affected by Tracer® ZN520 can be used as an inter-operable unit a vent or duct.

  • Page 35: Uc400-B/Symbio™ 400-B Controller

    ® • LonTalk is not polarity sensitive. Trane recommends that positions. the installer keep polarity consistent throughout the site. Notes: For more detailed information, refer to: • Only strip away two inches maximum of the outer •...
  • Page 36 1 2 3 4 1 2 3 4 24VDC 24VDC 24VDC BACnet BACnet BACnet 1 2 3 4 1 2 3 4 1 2 3 4 Trane BACnet UC400-B/ Terminator UC400-B/ UC400-B/ Tracer SC Symbio™ 400-B Symbio™ 400-B Symbio™ 400-B Zone Sensor...
  • Page 37 Installation - Controls • AC transformer requirements: UL listed, Class 2 power Power Supply transformer, 24Vac ±15%, device max load 24VA. The transformer must be sized to provide adequate power to Please read all of the warnings, cautions, and notices below the controller (12VA) and outputs (maximum 12VA per before proceeding with this section.

  • Page 38: Air-Fi® Wireless Communications System

    SC and Tracer® unit controllers. The Air-Fi® WCI is the perfect a. The power LED lights red for 1 second alternative to a Trane BACnet® wired communication link. b. The power LED lights green Eliminating the communication wire between terminal products, space sensors, and system controllers has •...
  • Page 39 Air-Fi® wireless system. The Wireless Comm Interface (WCI) enables wireless communication between system controls, unit controls, and wireless sensors for the new generation of Trane control products.The WCI replaces the need for communication wire in all system applications. Note: For more detailed information, refer to: •...

  • Page 40: Zone Sensor Options

    Installation - Controls Zone Sensor Options ® a building automation system using LonTalk Communication. Control sensor options include both unit-mounted (factory- • UC400-B/Symbio™ 400-B delivers single zone VAV installed) and wall-mounted sensors. Tracer® controller control in a stand-alone operation or as part of a building options available for the zone sensors are: ®...

  • Page 41: Zone Sensor Installation

    Installation - Controls Zone Sensor Installation Mounting Surfaces Using the hardware provided, mount the back plate of the Location Considerations sensor to a flat surface such as sheetrock or plaster, or an electrical junction box. The sensor must be mounted plumb for When selecting a location for the zone sensor, avoid the accurate temperature control and to ensure proper air following:...

  • Page 42: Zone Sensor Settings

    Installation - Controls Wired Zone Sensor Figure 45. Mounting zone sensor security screw Refer to the unit wiring schematic for specific wiring details and point connections. 1. Note the position of the setpoint adjustment knob and gently pry the adjustment knob from the cover using the blade of a small screwdriver.
  • Page 43 Installation - Controls • Each associated receiver/sensor set that communicates Figure 47. Set the rotary address switches on the within the reception range of the wireless system must receiver have a unique address. • It is not possible to associate more than one sensor to a receiver, nor is it possible to associate more than one Receiver receiver to a sensor.
  • Page 44 Installation - Controls Figure 48. Receiver conducts 20 second channel scan Figure 50. Power sensor by removing insulation strip Sec. After the channel scan is finished, LED3 begins blinking (one- Association is automatically initiated between the sensor and blink pattern) to show that the receiver is ready to be the receiver.

  • Page 45: Sensor Operations

    Installation - Controls Sensor Operations Figure 51. Wireless Zone Sensor (WZS) with LED lights to test for battery strength Temporary Occupancy (Timed Override) Temporary occupancy (timed override) is available on model WDS. Temporary occupancy is selected for after-business- hours adjustment of temperature setting, fan settings, or heat/ cool settings, when the system has changed to unoccupied mode.

  • Page 46: Wireless Sensor Specifications

    Installation - Controls Transmission Variables • LED3 flashes On every 2 seconds when it is ready to accept a sensor association request. When an association Sensor transmission time variables are as follows: request is made by a sensor, the receiver instructs the sensor on which power level to operate.

  • Page 47: Agency Compliance

    The European Union (EU) Declaration of Conformity is Figure 54, p. available from your local Trane® office. Figure 54. Wrench is shown in configuration mode Wireless Display Sensor (WDS)
  • Page 48 Installation - Controls Table 14. Configuration options for wireless display sensors Setting Configuration Options System No system options enabled Auto/Off Auto/Off/ Auto/Off/Low Low/High Med/High Note: Not all fan options are available for all systems. Off/High (On) Off/Low/High Off/Low/ No fan options Med/High enabled Occupancy (timed override)
  • Page 49 Installation - Controls Changing Room Temperature Figure 57. Locking and unlocking settings 1. To increase the room This symbol shows the current room temperature, press temperature, or To decrease the room your setpoint temperature, press selection while you are making an 2.

  • Page 50: Time Clock

    (see “Daylight Use only UL-listed non-rechargeable 1.5 V lithium AA Savings Time,” p. 52). batteries (Trane p/n X13770035010 or equivalent). For example, if the Daylight Savings Time is 2:30, the time setting for the clock should be 1:30. UV-SVX005G-EN...
  • Page 51 Installation - Controls Set the Time Format, Time, and Day 3. The minute display begins to blink—use + / - to select the desired setting and press OK. (Program to 24 hr or am/pm format.) 4. The day display (on the left side of the display screen) Figure 60.
  • Page 52 Installation - Controls Deleting Programs 1. Press the Menu button and then press OK until the ON hour time display of the program you want to delete is blinking. 2. Use the + / - to select -- and then press OK. Important: Switching programs must be deleted in ON-OFF pairs.

  • Page 53: Installation - Electrical

    Unit ventilator controls and control wiring Table 15. Motor quantity and horsepower can be factory mounted or field installed. Unit size Wiring diagrams illustrate the standard unit motors with one or more speed controls. Terminal wiring is provided by Trane and 0750 1000 1250 1500...
  • Page 54 Refer to Equipment Damage! the following table for the wire size range and maximum wiring 480 V/3-Wire is NOT compatible with Trane Classroom distance for each device. Unit Ventilator equipment. There must be a 4-wire system with a separate ground.

  • Page 55: Ecm Overview And Setup

    ECM Overview and Setup Overview Electronically Commutated Motor (ECM) This section addresses integrating the new Trane electronically commutated motor (ECM) and VelociTach™ motor control board. This exciting new series delivers Figure 65. Trane ECM outstanding comfort, safety, and performance with greatly reduced energy consumption compared to traditional units with induction AC motors.

  • Page 56: Velocitach™ Motor Control Board

    Incorporates a user interface that allows adjustment of certain unit parameters and provides constant feedback on motor operation. The VelociTach™ motor control board controls and reports the performance of up to two Trane brushless DC (BLDC) motors. • Integrates service and troubleshooting tools. •...

  • Page 57: Installation And Initial Setup

    Verify with a CAT III or IV Note: Normally, Trane ECMs are configured for soft ramps voltmeter rated per NFPA 70E that all capacitors have and transitions between speeds. However, to aid in discharged.
  • Page 58 If it is not practical to stay clear of these areas during adjustment of the motor control board, please contact Trane Global Parts for configuration kit that allows easy powering of the motor control board outside of the unit with a 9V battery.
  • Page 59 ECM Overview and Setup Table 19. Operational status codes mtr1 RPM Mode Indicates the current rpm of Motor 1 in the system. “0” rpm here RUNNING/ FAN STATUS → indicate that no fan speed has been requested. 0000 2000 CONTINUOUS LOOP mtr2 Indicates the current rpm of Motor 2 in the system.
  • Page 60 ECM Overview and Setup Table 20. Button actuation levels Menu/Set Button Duration Action Short Press in <1 sec None Status Display Toggles between parameter name and value without saving (abandons value if Short Press in Configuration Display changed). Long Press/Hold >3 sec Enters the configuration menu in Status Display...
  • Page 61 ECM Overview and Setup Example 4: Change the value of a protected value on an Figure 72. Verify value of 820 rpm electric heat unit. It appears the value has been changed, but after checking the value, the original value has been retained. Figure 73.

  • Page 62: Adjustments

    AlM1 AlM2 once the analog (0–10V) input is honored. please contact Trane Global Parts for configuration kit As a default, the noise floor/threshold is set to 3 percent (0.3V). that allows easy powering of the motor control board At 0.3V, the system will drive the motors to the speeds defined outside of the unit with a 9V battery.
  • Page 63 ECM Overview and Setup Although the VelociTach™ motor control board ships with Vflr AiSc Figure 75. Example 2: set too high but settings that will work with most 0–10 Vdc outputs, calibration correctly should be performed to maximize response range and controller authority.
  • Page 64 Trane Global Parts for configuration kit water is not available, but the motor control board will that allows easy powering of the motor control board service as a backup lockout.

  • Page 65: Configurations

    “On”. Do not change the Electric Heat Protection setting to “Off” and make changes to the protected Every Trane unit with ECM motors will have modules settings unless you are programming an unconfigured specifically configured at the factory for the operation of that service replacement board to match the unit settings on a ECM configuration label.
  • Page 66 ECM Overview and Setup NOTICE Equipment Damage! Do not change the PWM output voltage settings as motor damage could occur. Note: The motor control board functions and unit specific settings are summarized on the motor control board configuration label affixed to the back side of the control panel low voltage lid, on every unit.
  • Page 67 ECM Overview and Setup Table 22. Configuration settings of the motor control board (for reference only) User Description on Interface Typical User Unit Label Name Interface Value Description Hi 1 1080 Mtr 1 High Spd Sets the high-speed rpm for Motor 1. Do not exceed 2300 rpm.
  • Page 68 ECM Overview and Setup Table 22. Configuration settings of the motor control board (for reference only) (continued) User Description on Interface Typical User Unit Label Name Interface Value Description Rejects noise on the analog input lines and sets up the vFlr AI Floor motor control board to turn on if the thermostat or...
  • Page 69 ECM Overview and Setup Table 22. Configuration settings of the motor control board (for reference only) (continued) User Description on Interface Typical User Unit Label Name Interface Value Description Do NOT change this setting. This setting locks out the following parameters from being changed, for safe operation of the unit.

  • Page 70: Start-Up

    For variable frequency drives or slime. It is recommended that the services of a or other energy storing components provided by Trane qualified water treatment specialist be engaged to or others, refer to the appropriate manufacturer’s determine what water treatment, if any, is required.

  • Page 71: Unit Start-Up

    Start-Up Unit Start-up To configure the thermostat perform the following steps: 1. Verify the thermostat is in the OFF mode. Press the SYS Fan Speed Control (left) button until off mode displays. 2. Press the PROG/CONFIG button for 5 seconds while the thermostat is in OFF mode.
  • Page 72 Start-Up 6 – Pipe Sensor (Y/N) (for 2 pipe system only) 13 – Maximum Set Point Heating (Upper Limit) Select whether you are using a pipe sensor to monitor the pipe The maximum heating set point can be limited so the heating temperature.

  • Page 73: Tracer® Zn520 Controllers

    Start-Up Thermostat Button Function In this mode, the thermostat can automatically turn on heat or cool as needed. AUTO appears on display with heat set point and cool set point. Figure 79. Fan speed control Fan Mode Only use auto fan mode. The fan speed is determined by the number of degrees the room temperature differs from the set point.

  • Page 74: Sequence Of Operation

    Start-Up 3. Rotate the setpoint dial on the zone sensor module to 55°F setpoints can be found in the previous Setpoint operation for cooling or 85°F for heating. section. The appropriate control valve will actuate assuming the Unoccupied Mode following conditions: When the controller is in the unoccupied mode, the controller •...
  • Page 75 On button on the controlled based on the unit configuration and the required Trane zone sensor. cooling capacity. To maintain space temperature control, the When the controller is in unoccupied mode, you can press the...
  • Page 76 Start-Up Heating Operation Fan Mode Operation During heating mode, the controller attempts to maintain the For multiple fan speed applications, the controller offers space temperature at the active heating setpoint. Based on the additional fan configuration flexibility. Separate default fan occupancy mode of the controller, the active heating setpoint speeds for heating and cooling modes can be configured.
  • Page 77 Start-Up unnecessary water flow through the main coil when three-way Table 26. Local fan switch disabled or not present valves are used. Communicated Fan The controller invokes entering water temperature sampling Speed Input Fan Operation only when the measured entering water temperature is too cool to heat or too warm to cool.
  • Page 78 Start-Up using a modulating damper during the occupied, occupied 100 percent) to control the amount of fresh air cooling capacity. standby, unoccupied, and occupied bypass modes. When the fresh air temperature rises 5°F above the economizer enable point, the controller disables economizing The controller initiates the economizer function if the fresh air and moves the fresh air damper back to its predetermined temperature is cold enough for use as free cooling capacity.
  • Page 79 Start-Up Table 28. Binary input configurations Controller Operation Binary Input Description Configuration Contact Closed Contact Open BI 1 Low temperature detection Normally closed Normal Diagnostic BI 2 Condensate overflow(a) Normally closed Normal Diagnostic(b) BI 3 Occupancy Normally open Unoccupied Occupied BI 3 Generic binary input Normally open...
  • Page 80 Start-Up Table 30. Analog inputs (Tracer® ZN520) Function Range Description Terminals Zone TB3-1 Space temperature input 5°F to 122°F Ground TB3-2 Analog ground TB3-3 Setpoint input 40°F to 115°F 4821 to 4919 W (off) 2297 to 2342 W (auto) B3-4 Fan switch input 10593 to 10807 W (low) 13177 to 13443 W (medium)
  • Page 81 210.2 Space Temperature Measurement calculated setpoint is validated against the following setpoint limits: Trane zone sensors use a 10kΩ thermistor to measure the • Heating setpoint high limit space temperature. Typically, zone sensors are wall-mounted in the room and include a space temperature thermistor. As an •...

  • Page 82: Uc400-B/Symbio™ 400-B Controller

    BAS-SVX48*-EN: Tracer® UC400/UC400-B building automation system. Communication also is possible Programmable Controllers for Blower Coil, Fan Coil, and via Rover, Trane’s service tool. Peer-to-peer communication Unit Ventilator Installation, Operation, and Maintenance across controllers is possible even when a building automation •...
  • Page 83 The state of the local (hard wired) occupancy binary input controller is operating in the unoccupied mode and when either BI1. the timed override ON button on the Trane zone sensor is • A timed override request from a Trane zone sensor (see pressed or the controller receives a communicated occupied “Timed Override Control,”...
  • Page 84 CANCEL button is pressed on the Trane zone sensor or discharge air temperature setpoint. the occupied bypass time expires.
  • Page 85 Start-Up Heating or Cooling Mode Fan Operation The heating or cooling mode can be determined in one of two The controller supports 1-, 2-, 3-speed fans and variable- ways: speed fans. The fan always operates continuously while either heating or cooling during occupied, occupied standby, and •...
  • Page 86 Start-Up AUTO Fan Operation; ECM Energy Efficient Three-Wire Modulating Valve Operation Mode The controller supports tri-state 3-wire modulating valve control. Two binary outputs control each valve: one to drive the When the controller is configured for Energy Efficient Mode, by valve open and one to drive the valve closed.
  • Page 87 Start-Up A BAS-communicated minimum position setpoint has priority the fan is running at low speed, regardless of the occupancy over all locally configured setpoints. When a communicated state. Refer to Table 33, p. 87 Table 34, p. 87 for more minimum position setpoint is not present, the controller uses information about how the controller determines the position of the configured minimum position for low fan speed whenever...
  • Page 88 5 (BI5) to monitor the status of the fan for belt-driven or direct- Peer-to-peer communication is accomplished by means of driven units (except Trane Macon factory ECM fan motor custom TGP2 programming in the Tracer® SC system units). The fan status switch provides feedback to the controller or via hard wiring only between controllers.
  • Page 89 Start-Up Freeze Avoidance Freeze avoidance is used for low ambient temperature protection. It is initiated only when the fan is OFF. The controller enters the freeze avoidance mode when the outdoor air temperature is below the freeze avoidance setpoint (configurable using the Tracer® TU service tool). The controller disables freeze avoidance when the outdoor air temperature rises 3°F (1.7°C) above the freeze avoidance setpoint.

  • Page 90: Maintenance

    Additional information for controls provided from supplier other trained in handling live electrical components perform than Trane should be obtained from the controls manufacturer. these tasks. Maintenance Checklist Frequency...

  • Page 91: Drain Pan/Fan/Motor Board Assembly

    Maintenance Drain Pan/Fan/Motor Board For units with high efficiency filters (MERV 8 or MERV 13), the filters need to replaced with equivalent MERV-rated filters to Assembly maintain unit performance. NOTICE WARNING Equipment Damage! Hazardous Voltage! Do not operate unit without filters or grilles in place. Failure to do so may cause equipment failure.
  • Page 92 Maintenance 7. Thoroughly clean any contaminated area(s) with a mild bleach and water solution or an EPA-approved sanitizer specifically designed for HVAC use. 8. Immediately rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential corrosion of metal surfaces.

  • Page 93: Coil Cleaning

    Follow proper lockout/ tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors.
  • Page 94 Maintenance 4. Vacuum the dust/particles from the coil face. 8. Confirm the drain line is open following the cleaning process. 5. Reverse order for re-installation. 9. Allow the unit to dry thoroughly before putting it back into All coils should be kept clean to maintain maximum service.
  • Page 95 Maintenance 12. Replace all panels and parts and restore electrical power 4. Thoroughly clean the contaminated area(s) with an EPA- to the unit. approved sanitizer specifically designed for HVAC use. 13. Be careful any contaminated material does not contact 5. Rinse the affected surfaces thoroughly with fresh water other areas of the unit or building.

  • Page 96: Diagnostics And Troubleshooting

    Replace malfunctioning component, or contact the control’s Face-and-bypass damper, or coil valve is malfunctioning. contractor, or if Trane controls, see CNT-SVX04*-EN for more information concerning Tracer® controls. Room sensor is not properly set. Reset room sensor temperature.

  • Page 97: Wireless Zone Sensors (Wzs)

    Recommended Action Check fuse in right-hand end pocket inside the transformer 265 and 460 volt If the unit fails to start. mounting box. Replace with Trane fuse X1311057435 (ABC unit type 6A 250V). Wireless Zone Sensors (WZS) Figure 87. WZS showing LED locations and test button The receiver for all models has four LEDs: LED1, LED2, LED3, and LED5.
  • Page 98 Diagnostics and Troubleshooting Receiver Diagnostics LED1, LED2, and LED3, located on the receiver of all models respond to diagnostics by exhibiting specific blinking patterns. They respond independently of any user action. Table 38. Diagnostics on the receiver LED state Indicates... Disassociated LED1: Off Receiver is not associated, waiting for a sensor.
  • Page 99 Diagnostics and Troubleshooting Testing Signal Strength • Models WZS: LED1, LED2, and LED3 respond by indicating signal strength. You can view them on the sensor To initiate a signal strength test, push the Test button on the (Table 40, p. 99) and the receiver (Table 41, p.
  • Page 100 L91 batteries model WDS (see Figure 88, p. 97). already installed. Replacement batteries are available at Trane For more information on interpreting the LEDs and the display Service Parts Centers (p/n X13770035010) or other local symbols that indicate signal strength, see “Testing Signal...
  • Page 101 Diagnostics and Troubleshooting Note: If lithium batteries are temporarily unavailable, alkaline 3. Record the address and location of the receiver and sensor batteries can be used. However, alkaline battery life is pair. very short by comparison. 4. After verifying that the receiver and sensor are powered Notes: The battery life for model WDS may decrease with up, press the Test button on the sensor to establish that the extended LCD display activity.

  • Page 102: Servicing And Testing Wzs

    Diagnostics and Troubleshooting Servicing and Testing WZS Procedure for Testing Receiver If the receiver is not working as expected: If the wireless sensor system is not working as expected, use 1. Verify that the receiver is powered. the tools and procedure described in this section. 2.

  • Page 103: Zn520 Controllers

    Diagnostics and Troubleshooting Measuring Output Resistance Note: The output circuits are not electrically powered; consequently, resistance can be To measure the resistance of receiver outputs for zone measured without risk of damage to the volt- temperature and setpoints for all models, and heating setpoint ohm meter.
  • Page 104 Diagnostics and Troubleshooting Red Service LED The red LED normally indicates if the unit • Force the water valve to open and balance the hydronic controller is operating properly or not. Refer to Table 49, system 104. Note: The manual output test is not an automatic cycle. You must press the TEST button to proceed through each Table 49.
  • Page 105 Diagnostics and Troubleshooting Table 51. Tracer® ZN520 test sequence Electric Heat or Aux. Fresh Air Main Valve Valve Damper Generic/Baseboard Heat Step J1-1 J1-2 J1-3 J1-5 J1-6 J1-9 J1-10 J1-11 J1-12 TB4-1 1(a) aux: on EH: off Fan high High Fan low Main open High...
  • Page 106 Building Automation System Trane Service Tools Some building automation systems can reset diagnostics in Rover, Trane’s service tool for the controller, can reset the Tracer® ZN520 controllers. For more complete diagnostics present in the controller. For complete information information, refer to the product literature for the building about Rover, refer to: automation system.
  • Page 107 Diagnostics and Troubleshooting Fans with ZN520 Controllers Table 53. Fan does not energize Probable Cause Explanation After power-up, the controller always observes a random start that varies between 0 and 30 seconds. The controller remains off until Random start observed the random start time expires.
  • Page 108 Diagnostics and Troubleshooting Electric Heat with ZN520 Controllers Table 56. Electric heat not operating Probable Cause Explanation Normal operation The controller cycles electric heat on and off to meet the unit capacity requirements. It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated to the Requested mode: off controller, the units shuts off the electric heat.

  • Page 109: Uc400-B/Symbio™ 400-B Controller

    Diagnostics and Troubleshooting UC400-B/Symbio™ 400-B activity, an indication or troubleshooting tip for each, and any related notes. Controller LED Activity There are 15 LEDs on the front of the UC400-B/Symbio™ 400- B controller. The following table provides a description of LED Table 59.
  • Page 110 Diagnostics are reported in the order in which they occur. Multiple diagnostics Trane Service Tools can be present simultaneously. Diagnostic messages are Tracer® TU can be used to reset diagnostics present in a viewed using the Tracer®...
  • Page 111 Diagnostics and Troubleshooting Table 60. Diagnostics generated by UC400-B/Symbio™ 400-B controller Diagnostic Probable Cause Consequences Diagnostic Type • Fan Unaffected Fan run hours exceed the time set to indicate Filter change required • Valves Unaffected Informational filter change. • Electric heat Unaffected •...
  • Page 112 Diagnostics and Troubleshooting Fans with UC400-B/Symbio™ 400-B Controller Table 61. Fan does not energize Probable Cause Explanation The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal fan operation. Unit wiring Refer to applicable wiring diagram.
  • Page 113 Diagnostics and Troubleshooting DX Coils or Electric Heat with UC400-B/ Symbio™ 400-B Controller Table 64. DX or electric heat does not energize Probable Cause Explanation The wiring between the controller outputs and the end devices must be present and correct for normal operation. Refer to applicable Unit wiring wiring diagram.

  • Page 114: Thermostat

    For variable frequency drives The VelociTach™ motor control board oversees and monitors or other energy storing components provided by Trane all motor operations and changes to speed resulting from: or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of •...
  • Page 115 Diagnostics and Troubleshooting Troubleshooting Tips • For proper operation of the system, all plugs must be firmly seated in all boards and motors. Insecure connections will • VelociTach motor control board configuration must cause malfunction and the system will shutdown. perfectly match the factory-supplied ECM.
  • Page 116 Motor not controllable Replacing ECM Components board. If it is not practical to stay clear of these areas during adjustment, please contact Trane Global Parts for configuration kit that allows easy powering of the engine WARNING board outside of the unit with a 9V battery.
  • Page 117 Diagnostics and Troubleshooting Replacement Checklist 2. If replacing the VelociTach™ motor control board, special care should be taken to avoid electro-static discharge damage. Please use an ESD protection wrist-strap and NOTICE frequently touch a grounded surface (with unit power off) to Equipment Damage! discharge any static buildup.
  • Page 118 Diagnostics and Troubleshooting limit the output power of the motor under these overload Figure 93. Ensure CSTI adapter board switches are set conditions. If the motors cannot achieve rpm close to the target correctly for a specific period of time, the unit will disable electric heat and fan-status indicators.

  • Page 119: Wiring Diagrams

    Table 70. Wiring diagram matrix Drawing Number Description Power 2311-4278 Power Schematic, VUV - ZN520, CSTI and No Controls without Electric Heat 4619-4480 Power Schematic, VUV - ZN520 and CSTI with Electric Heat 2311-4161 Power Schematic, VUV - UC400B without Electric Heat...
  • Page 120 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

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