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.

November 2024

SAFETY WARNING

UV-SVX006A-EN

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Summary of Contents for Trane VUV

Page 1 Installation, Operation, and Maintenance Vertical Classroom Unit Ventilator Model VUV 750 CFM to 1500 CFM 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. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
Page 2 (HCFCs). Not all refrigerants containing these compounds bump cap, fall protection, electrical PPE and arc have the same potential impact to the environment. Trane flash clothing). ALWAYS refer to appropriate advocates the responsible handling of all refrigerants.
Page 3 This document and the information in it are the property of regulations are more stringent than these Trane, and may not be used or reproduced in whole or in policies, those regulations supersede these part without written permission. Trane reserves the right to policies.
Page 4 Table of Contents Model Number Descriptions ....7 Refrigerant Removal and Evacuation ......32 General Information .
Page 5 Table of Contents Zone Sensor Dimensions ....46 Split System Start-Up ..... 60 Wired Zone Sensor.
Page 6 Table of Contents Modulating Outdoor/Return Air Replacing a Failed Sensor or Damper......80 Receiver .
Page 7 Digit 1, 2, 3 — Unit Model Digit 19 — Cooling/Changeover Valve Type Digit 14 — Preheat/Reheat/Changeover Coil VUV = Vertical Unit Ventilator 0 = None A = 2-way, 2 position N.C. A = 4-pipe preheat coil (RH cooling/LH B = 2-way, 2 position N.O.
Page 8 Model Number Descriptions Digit 23 — Discharge Arrangement Digit 32 — Depth Digit 38 — Heating Auto Flow GPM 0 = Opening only, no grille A = 16.63 in. standard depth 0 = None A = Grille discharge B = 21.25 in. depth with baffle A = 1.0 B = Double deflection discharge grille C = 21.25 in.
Page 9 With on the ability to create a comfortable, learning-friendly this in mind, Trane’s classroom unit ventilator is designed surrounding. Being too hot or too cold could hinder to support today’s changing environment. Its blow-thru students ability to achieve academic excellence.
Page 10 The drain pan Equipment Damage! connection size for all Trane VUVE models is 7/8 in. OD. Failure to protect the unit from freezing could result in Motors for the VUVE model do not include an external fan equipment damage.
Page 11 ☐ mail. Request an immediate joint inspection of the damage by the carrier and consignee. Handling Notify your Trane sales representative of the damage and arrange for ☐ repair. Trane recommends leaving units and accessories in their shipping packages/skids for protection and handling ease Inspect the unit for concealed damage as soon as possible after until installation.
Page 12 If indoor storage is not possible, Trane makes the following The floor or foundation must be level and the recommendations to prevent damage: condensate drain at the proper height for proper drainage and condensate flow.
Page 13 Dimensions and Weights Service Clearances WARNING Proper Field Wiring and Grounding Attention should be given to service clearance and technician safety. The unit should contain enough space for Required! service personnel to perform maintenance or repair. Failure to follow code could result in death or serious Provide sufficient room to make water, and electrical injury.
Page 14 Dimensions and Weights Table 1. Vertical unit ventilator general data (continued) Unit size Description 0750 1000 1250 1500 Coil type B 0.31 0.41 0.51 0.61 Coil type C 0.31 0.41 0.51 0.61 Coil type D 0.44 0.57 0.70 0.93 Coil type E 0.44 0.57 0.70...
Page 15 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 16 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 17 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 18 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 19 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) Table 7.
Page 20 1. Crossover piping is available for all 2- or 4-pipe coils flex hose rated at 250 psi working pressure. Flex hose selections. Trane provides the crossover for the hot is only available with factory mounted piping packages. water only. The crossover pipe is factory insulated with 3.
Page 21 ☐ Ensure the unit chassis is installed level. For Trane wall box, dimensions are actual, and may be used to define the wall opening. Important: The unit must be installed level (zero...
Page 22 Installation - Mechanical Figure 10. Masonry wall installation Figure 11. Flanged wall box installation in 2-in. curtain wall Interior wall Interior wall with sheetrock with sheetrock Outside Outside Unit wall Unit wall Caulking Rubber seals Rubber seals Grout Flanged wallbox Floor Weep holes...
Page 23 Installation - Mechanical There are 1/2-inch mounting or anchoring holes located on Note: All mounting fasteners are to be provided by the the back of the unit on each end. installer. Table 9. Mounting hole location (inches) Type Unit size Standard unit (no falseback) 1.31 13.50...
Page 24 Installation - Mechanical 3. Ensure the unit rests tightly against the wall. Check for 3. The bottom of the subbase has weld nuts in four slots. proper seal and that air does not leak underneath the Place the leveling legs in those slots and level the unit. unit.
Page 25 Coil Piping and Connections Coil Piping and Connections Note: Condensate removal to the main system should be made through the bottom of the unit ventilator. If The coil headers and drain connections are made within other location for condensate removal is desired, a the unit chassis to allow a tight seal and help prevent air specific field cut-out for the connection should be leakage around the coil.
Page 26 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 27 Coil Piping and Connections All union connections should be tightened in the field. Units Figure 18. Manual circuit setter valve, differential pressure vs. flow 1/2 inch are shipped with union connections hand tightened only in the factory. Proper installation of piping is necessary to provide efficient coil operation and to prevent damage during operation.
Page 28 Coil Piping and Connections Table 12. Valve stroke time (continued) which setting is necessary to achieve the appropriate pressure drop. Valve Selection End Stop Stroke Time 3. Carefully remove the Schrader pressure port Position (seconds) connection caps on the manual circuit setter, since they 5.9 Cv, 1/2 in.
Page 29 AB port must be connected to the and swage. The condensing unit lines can then be brought coil. into the swage and brazed. Trane recommends the use of Figure 21. Belimo steam schematic nitrogen purge when brazing refrigerant lines to prevent formation of oxides in the lines.
Page 30 Coil Piping and Connections Figure 23. Exploded valve assembly Figure 24. Wiring for modulating steam valve actuator UV-SVX006A-EN...
Page 31 • To be repaired only by trained service At all times, Trane’s maintenance and service guidelines shall be followed. If in doubt, contact Trane technical personnel. support for assistance. • Do not puncture refrigerant tubing.
Page 32 • Verify continuity of earth bonding. 5. Continuously flush or purge with inert gas when using • Replace electrical components with Trane replacement flame to open circuit. parts, or those meeting the same ratings and qualified 6. Open the circuit.
Page 33 A2L Information • Ensure that contamination of different refrigerants does 8. Do not overfill cylinders (no more than 80% volume not occur when using charging equipment. liquid charge). • Hoses or lines shall be as short as possible to minimize 9.
Page 34 A2L Information Ignition Sources in Unit adjusted A threshold. This product contains a leak detection system if a circuit charge is greater than 3.91 This unit does not contain any ignition sources. All potential lbs. As a result, no further leak detection system ignition sources, (including factory or field installed evaluation is needed.
Page 35 A2L Information Figure 26. Charge vs min room area (SI) Charge vs Min Room Area (SI) 280.0 260.0 Release Height-0.6m 240.0 Release Height-1.0m Release Height-1.4m 220.0 Release Height-1.8m Release Height-2.2m 200.0 180.0 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 10.0 12.0 14.0...
Page 36 A2L Information of refrigerant with a minimum room area requirement of mechanical ventilation system meets the requirements of 180 ft with a 2.2 m release height. ANSI\ASHRAE Standard 15-2022, Section 7.6.4. Leak Detection System = 180 ft x 1.05 x 2 = 378 ft min.adj (Refrigerant charge greater than 3.91 lb No additional ventilation is required.
Page 37 The fan speed control is available for units that do not have Variable Fan Speed, and 24 Vac Supply, valve control, Trane factory-mounted control packages. This variable fan EH control, damper control, condensate overflow speed option is low-voltage and has three 24-volt relays status.
Page 38 Installation - Controls Figure 30. CSTI adapter board: board-mounted 2. 24 Vac Y (gnd) 11. V2C1/EH2St (not std) switches 3. High 12. Damper Open 4. Medium 13. Dmp Cl (not std) 5. Low The CSTI adapter board provides all the hookups of the standard adapter board, but in addition provides hookups for valve control (main and auxiliary coils), electric heat control and damper control.
Page 39 Fprv parameter set to EHl or Ehfs to use the coil. In this case, hot water is determined if: changeover functions. a. A 10K NTC thermistor (similar to Trane part number a. Ehl parameter should be chosen if the unit has a X13790374010) is wired properly to the engine changeover coil without electric heat.
Page 40 Installation - Controls SW4 selects the electric heat lockout function, where we Field-supplied BACnet® MS/TP link wiring must be will lock out the electric heat circuit based on either: installed in compliance with NEC and local codes. The wire must be low-capacitance, 18-gauge, stranded, tinned- 1.
Page 41 24VDC BACnet BACnet BACnet 1 2 3 4 J1 8 1 2 3 4 1 2 3 4 J1 7 Trane J1 6 P ho e nix 4 Pin AMP P ho e nix BACnet Terminator Tracer SC Symbio™ 400-B Symbio™...
Page 42 Installation - Controls Connecting Wires If a single transformer is shared by multiple Symbio 400-B controllers: Figure 34. Grounding the controller • The transformer must have sufficient capacity. • Polarity must be maintained for every Symbio 400-B controller powered by the transformer. Notes: If the polarity is inadvertently reversed between two controllers powered by the same transformer, a difference of 24 Vac will occur between the grounds...
Page 43 Tracer® SC and Tracer® unit controllers. The Air-Fi® when access and routing of communication cable are WCI is the perfect alternative to a Trane BACnet® wired issues. The sensor allows flexible mounting and relocation. communication link. Eliminating the communication wire...
Page 44 Installation - Controls Zone Sensor Options Figure 37. Wall-mounted display sensor (SP, OCC/ UNOCC, OALMH) Control sensor options include both unit-mounted (factory- installed) and wall-mounted sensors. Tracer® controller options available for the zone sensors are: • Symbio™ 400-B delivers single zone VAV control in a stand-alone operation or as part of a building automation system using BACnet®...
Page 45 Installation - Controls Figure 40. Wall-mounted wireless display sensor, • Exterior walls and other walls that have a temperature unit-mounted receiver (SP, OALMH) differential between the two sides. • Areas that are close to heat sources such as sunlight, appliances, concealed pipes, chimneys, or other heat- generating equipment.
Page 46 Installation - Controls Before beginning installation, consider the location 1. Note the position of the setpoint adjustment knob and considerations below. Also, refer to the unit wiring gently pry the adjustment knob from the cover using the schematic for specific wiring details and point connections. blade of a small screwdriver.
Page 47 Installation - Controls Zone Sensor Setting Figure 44. Mounting zone sensor base plate Address Setting The process of establishing communication between a receiver and sensor is referred to as association. The following limitations apply: • Each associated receiver/sensor set that communicates within the reception range of the wireless system must have a unique address.
Page 48 Installation - Controls Figure 45. Setting the rotary address switches on the After the channel scan is finished, LED3 begins blinking receiver and the sensor (one-blink pattern) to show that the receiver is ready to be associated with a sensor (see part 2 of the following figure). Sec.
Page 49 Installation - Controls Figure 46. Model WZS sensor LED1 LED2 LED3 LED5 Association is automatically initiated between the sensor Test button and the receiver. When LED3 on the receiver stops blinking, association has been established. If the first association attempt is unsuccessful, the sensor automatically re-attempts association with the receiver every 10 minutes.
Page 50 Installation - Controls Sensor Operations • LED3 flashes On every 2 seconds when it is ready to accept a sensor association request. When an Temporary Occupancy (Timed Override) association request is made by a sensor, the receiver instructs the sensor on which power level to operate. Temporary occupancy (timed override) is available on Then the receiver and sensor begin operation at the model WDS.
Page 51 AUTO transmissions Range values are estimated transmission distances for satisfactory operation. Actual distance is job specific and must be determined during site evaluation. Agency Compliance The European Union (EU) Declaration of Conformity is available from your local Trane® office. UV-SVX006A-EN...
Page 52 Installation - Controls Press the center button on the keypad to begin the Configure the sensor options in the order shown in the configuration process. table. • Press to scroll to the next selection (as illustrated). • Press to move to the next menu (as illustrated).
Page 53 If you press a keypad button to try change a locked setting, the locked symbol will flash. WDS Operating Mode This section describes how to operate the Trane wireless Locking or Unlocking Settings sensor, model WDS. Figure 48, p. 53...
Page 54 Installation - Controls Changing Room Temperature Changing Heating and Cooling Room Temperature Settings This symbol shows 1. To increase the the current room room temperature, (applies to some systems) temperature, or your press setpoint selection To decrease the room Some systems allow while you are making 1.
Page 55 Press the Test button to display the battery status symbols. disappears. After Use only UL-listed non-rechargeable 1.5 V lithium AA 30 seconds, the unoccupied batteries (Trane p/n X13770035010 or equivalent). symbol will re- Select to cancel appear. Time Clock occupancy •...
Page 56 Installation - Controls Set the Program Figure 49. Time clock Note: The Time Clock should be used to program the unit for the UNOCCUPIED mode — the periods of time when the unit will not be in operation. The mode you are programming is shown on the LED display: : The Timer is in operation (ON).
Page 57 Installation - Controls Preset Program Selections Daylight Savings Time When selecting daily programming, preset selections can Note: Use +1h button to make the change to and from be used. Daylight Savings Time. Press the +1h button to add 1 hour to the current time. Figure 51.
Page 58 Wiring diagrams illustrate the standard unit motors with one electrical codes. or more speed controls. Terminal wiring is provided by Trane and the actual components used for a particular WARNING installation may differ. Control and line diagrams for the exact control system used are provided with each unit.
Page 59 Installation – Electrical Note: All field wiring should conform to NEC and all Supply Power: Power supply wiring is to be connected to applicable state and local code requirements. The terminals 1 and 2 at the junction box in the left end pocket, control panel box is always on the end opposite the below the discharge air grille.
Page 60 Installation – Electrical Split System Start-Up • Frostat® bulb • TXV bulb After all piping and wiring has been completed, follow the instructions provided with the condensing unit for control Both components are to be field installed using the testing and system start-up. If sweat type field-piped installation kit shipped with the unit.
Page 61 VelociTach™ motor control board • CSTI adapter board (CSTI control only) This section addresses integrating the new Trane electronically commutated motor (ECM) and VelociTach™ The motors and modules are combined as systems, and motor control board. This exciting new series delivers cannot work without each other.
Page 62 • Incorporates various safety and lockout features, such The VelociTach™ motor control board controls and reports as maintaining proper fan speeds if electric heat is the performance of up to two Trane brushless DC (BLDC) called for. motors. Status Display Figure 55.
Page 63 16 AWG and 24 AWG, with a ~4–5mm wire strip length. of the motor control board, please contact Trane Global The terminal blocks have 5mm spacing, and are equipped Parts for configuration kit that allows easy powering of with 3mm screws.
Page 64 ECM Overview and Setup open. The motor control board will be visible. See Figure The motor control board features a nested menu integrated 57, p. user interface (UI) that supports: • Status display for instant touch-free confirmation of unit Figure 57. VelociTach™ motor control board operation.
Page 65 ECM Overview and Setup Figure 58. User interface input buttons Each button has several different actuation levels depending on length of press, and what the UI is currently displaying. Table 21. Button actuation levels Menu/Set Button Duration Action Short Press in Status Display <1 sec None Short Press in Configuration...
Page 66 ECM Overview and Setup Figure 59. Verify low speed value Example 2: Change the value of Low Speed to 820 rpm: If the display has timed out and returned to the status loop, repeat Example 1 and Example 2 to arrive back at this Continue from the previous example as shown below, example’s starting point.
Page 67 Trane Global Parts for of the system. configuration kit to power control board outside the unit with a 9-volt battery.
Page 68 ECM Overview and Setup CAUTION Although the VelociTach™ motor control board ships with settings that will work with most 0–10 Vdc outputs, Burn Hazard! calibration should be performed to maximize response Failure to follow this instruction could result in the range and controller authority.
Page 69 If avoiding these areas is not practical during motor control board adjustment, contact Trane Global Parts for configuration kit to power control board outside the unit with a 9-volt battery.
Page 70 Configurations configured to cause hydronic heat and electric heat to be mutually exclusive: Every Trane unit with ECM motors will have modules – On units with BACnet® controls (Symbio™ 400-B), specifically configured at the factory for the operation of the Tracer controller board will serve as the primary that unit.
Page 71 ECM Overview and Setup NOTICE Do not change the electric heat protection settings if your unit has electric heat. Motor Damage! If the format setting for rpm values are not correct (i.e., not Failure to follow instructions below could result in four-digit: XXXX), please check the operation mode of the motor damage.
Page 72 ECM Overview and Setup Table 23. Configuration settings of the motor control board (for reference only) (continued) Typical User User Description on Inter- Description Inter- Unit Labe face face Name Value Sets the PWM voltage, for cases when the PWM This setting must NOT be changed, as damage to the Mtr 1 PWM Volt M M 1 1 v v l l...
Page 73 ECM Overview and Setup Table 23. Configuration settings of the motor control board (for reference only) (continued) Typical User User Description on Inter- Description Inter- Unit Labe face face Name Value Sets the maximum ramp time for both Motor 1 and Overrides the ramp rates M M 1 1 r r p p and M M 2 2 r r p p if the Ramp MAX Time M M h h r r p p...
Page 74 ECM Overview and Setup unit heat/cool. Observe the fan spinning, and then Note: The E E h h E E n n indicator is unit-specific and may indicate observe the fan display on the motor control board. It Off at this point; refer to thermistor function for more should display a looping status indicator as follows: information.
Page 75 Disconnect all electric power, including remote specialist to determine what water treatment, if any, is disconnects and discharge all motor start/run required. Trane assumes no responsibility for capacitors before servicing. Follow proper lockout/ equipment failures which result from untreated or tagout procedures to ensure the power cannot be improperly treated water, or saline or brackish water.
Page 76 Start-Up Unit Start-Up Installation, Operation, and Maintenance (BAS-SVX093*- Fan Speed Control Follow the procedure below to operate the Symbio™ 400-B in a stand-alone operation: Figure 67. Fan speed control 1. Turn power on at the disconnect switch option. 2. Position the fan mode switch to either high, medium, low, or the auto position.
Page 77 (see “Occupancy Modes,” p. 77). either the timed override ON button on the Trane zone sensor is pressed or the controller receives a • A communicated signal from either a Tracer® SC or communicated occupied bypass signal from a BAS.
Page 78 CANCEL button is operation. pressed on the Trane zone sensor or the occupied bypass Discharge Air Tempering time expires. If the controller is in cooling mode, cascade zone control...
Page 79 Start-Up Water Temperature Sampling Function • The fan speed switch is set to OFF The entering water temperature sampling function is used • Specific diagnostics are generated with 2-pipe and 4-pipe changeover units and requires a • The default fan speed is set to OFF and the fan is valid entering water temperature value.
Page 80 Start-Up Three-Wire Modulating Valve Calibration Important: If exhaust control is added to an existing configuration, all other configuration options Modulating valve calibration is automatic. During normal should be verified to match the correct controller operation, the controller overdrives the actuator equipment options.Temperature and flow (135 percent of the stroke time) whenever there is a setpoints will revert to default values.
Page 81 Start-Up Table 24. Modulating outdoor air damper position setpoint determination (continued) Occupancy BAS-communicated Setpoint Fan speed Active Minimum Setpoint Occupied Medium/high Occupied minimum Invalid Occupied bypass Occupied standby Medium/high Occupied standby minimum Invalid Table 25. Relationship between outdoor temperature sensors and damper position Modulating outdoor air damper position Outdoor Air Temperature Occupied or Occupied Bypass...
Page 82 (except Trane Macon factory ECM fan motor units). The setpoint (configurable using the Tracer® TU service tool). fan status switch provides feedback to the controller as...
Page 83 Start-Up The following occurs when the controller is in freeze operation is initiated whenever the discharge air avoidance mode: temperature falls below the discharge air temperature low limit. The discharge air temperature low limit is configurable • Valves are driven open to allow water to flow through using the Tracer®...
Page 84 Additional information for controls provided from supplier trained in handling live electrical components perform other than Trane should be obtained from the controls these tasks. manufacturer. Maintenance Checklist...
Page 85 Maintenance Air Filters which may result in insufficient heating during the morning warm-up period and loss of natural cooling capacity during WARNING mild weather. Rotating Components! For units with high efficiency filters (MERV 8 or MERV 13), the filters need to replaced with equivalent MERV-rated Failure to disconnect power before servicing could filters to maintain unit performance.
Page 86 Maintenance Figure 70. Disconnect drain line from P-trap and Troubleshooting,” p. 91 for possible causes and solutions. 1. Disconnect all electrical power to the unit. Fans P-trap 2. Remove four pan clips located at each end of the pans front. EC motor Filters 3.
Page 87 Maintenance WARNING Figure 72. Routing motor and crossover harnesses Rotating Components! 10-16 x 0.50 sheet Coil blockoff top back panel metal black screw Failure to disconnect power before servicing could Leave front set of holes open result in rotating components cutting and slashing one each end of block-off panel technician which could result in death or serious (no screw installed here)
Page 88 Maintenance WARNING WARNING Hazardous Voltage w/Capacitors! Hazardous Chemicals! Failure to disconnect power and discharge capacitors Failure to follow this safety precaution could result in before servicing could result in death or serious death or serious injury. Coil cleaning agents can be injury.
Page 89 Maintenance Refrigerant Coils However, when the fan stops, water vapor condenses on the cold metal surfaces inside the air handler and remains WARNING there until the air warms sufficiently to re-evaporate it. This damp, dark environment—though temporary—can Hazardous Pressures! encourage the growth of mold, mildew, and other microbial Failure to follow instructions could result in coil contaminants.
Page 90 Maintenance 8. Allow the unit to dry thoroughly before putting it back To clean a porous insulating surface (fiberglass insulation): into service. 1. Disconnect all electrical power to the unit. 9. Replace all panels and parts and restore electrical 2. Wearing the appropriate personal protective power to the unit.
Page 91 Diagnostics and Troubleshooting This section is intended to be used as a diagnostic aid only. WARNING For detailed repair procedures, contact your local Trane Hazardous Service Procedures! service representative. Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury.
Page 92 Reset room sensor temperature. Clogged filter. Replace filter. Replace malfunctioning component, or contact the Face and bypass damper, or coil valve is control’s contractor, or if Trane controls, see malfunctioning. CNT-SVX04*-EN for more information concerning Room too hot Tracer® controls.
Page 93 Diagnostics and Troubleshooting The sensor for a wireless zone sensor (WZS) has four Figure 76. Wireless display sensor (WDS) shows test symbols and error codes LEDs: LED1, LED2, LED3, and LED5 and a test button. Locations are shown in the following figure. Figure 75.
Page 94 Diagnostics and Troubleshooting Table 30. Diagnostics for wireless zone sensors and error code shown on wireless display sensor (continued) Error code shown on LED state when Test button is pressed on WZS Indicates... LED1: Off Address set to 000 LED2: Off Address not set to between 001–999.
Page 95 Diagnostics and Troubleshooting Table 32. Observing signal strength on the receiver User action LED state on receiver Indicates... LED1: Off Normal state None LED2: Off No Test button press. LED3: Off LED1: On LED2: On Excellent signal strength LED3: On Good signal margin for reliable communication.
Page 96 If an association already installed. Replacement batteries are available at was previously established between a receiver and a Trane Service Parts Centers (Part number: sensor and needs to be re-established, the manual X13770035010) or other local suppliers.
Page 97 Diagnostics and Troubleshooting Disassociation • The LEDs on the receiver, LEDs on the model WZS sensor, and the display on the model WDS sensor The receiver disassociates from the sensor (by removing • The Test button on the sensor all stored association information), conducts a channel scan, and restarts itself, if any of the following are true: •...
Page 98 Diagnostics and Troubleshooting Failure and Default Modes but the receiver determines the ultimate output power level of the sensor. The following table provides output values for failure and default modes of operation, which can be used for troubleshooting. Table 35. Output values - failure and default modes of operation Zone temperature Zone setpoint Heating setpoint...
Page 99 Diagnostics and Troubleshooting Table 37. LED activity and troubleshooting tips for Symbio™ 400-B controller Indication and Troubleshooting Tips LED Name Activities Notes Shows solid green when the unit is Indicates normal operation powered and no alarm exists Shows blinking green during a Indicates normal operation device reset or firmware download...
Page 100 For more complete information, refer to the each provides. product literature for the building automation system. The diagnostic types are: Trane Service Tools • Manual (latching) diagnostics Tracer® TU can be used to reset diagnostics present in a •...
Page 101 Diagnostics and Troubleshooting Table 38. Diagnostics generated by Symbio™ 400-B controller Diagnostic Consequences Diagnostic Type Probable Cause • Fan Unaffected Fan run hours exceed the time set to indicate filter Filter change required Informational • Valves Unaffected change. • Electric heat Unaffected •...
Page 102 Diagnostics and Troubleshooting Table 38. Diagnostics generated by Symbio™ 400-B controller (continued) Diagnostic Consequences Diagnostic Type Probable Cause • Fan Unaffected • Valves Unaffected Invalid or missing value for generic analog input. Generic AIP failure Informational • Outdoor air damper Unaffected •...
Page 103 Diagnostics and Troubleshooting Valves with Symbio™ 400-B Controller Table 40. Valves remain closed Explanation Probable Cause The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation. Refer Unit wiring to applicable wiring diagram. The valves must be checked to ensure proper operation.
Page 104 Diagnostics and Troubleshooting Table 42. DX or electric heat does not energize (continued) Explanation Probable Cause If the controller does not have power, heat outputs do not operate. For the controller to operate normally, apply an input No power to the controller voltage of 24 Vac.
Page 105 Diagnostics and Troubleshooting ECM Motors – Electric heat requests will bring the fan to the proper speed. WARNING • Conflicting fan speed requests Hazardous Voltage w/Capacitors! – If two or more commands are received (direct or Failure to disconnect power and discharge capacitors indirect), the fan will honor the higher speed before servicing could result in death or serious requested.
Page 106 Diagnostics and Troubleshooting Table 45. Motor does not spin, spins too slowly Situation Probable Cause Solution • Remove obstruction from the fan wheel. • Ensure that motor plugs and all plugs to adapter boards and the ECM engine board are secure Motor has been locked out Motor 1 has an obstruction.
Page 107 If it is not practical to stay clear of these areas during adjustment, please contact Trane Global Parts inadvertently energized. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have for configuration kit that allows easy powering of the engine board outside of the unit with a 9V battery.
Page 108 VelociTach™. • Only genuine Trane replacement components with identical Trane part numbers should be used. • Unit fan assemblies contain concealed wires that should be removed before the fan-board is removed, to avoid nicking the wire.
Page 109 Diagnostics and Troubleshooting Field Power Wiring the unit, discomfort to the end user, and loud fan operation. This motor uses an electronic variable speed motor control, which includes a line reactor to minimize power line Figure 79. Configure VelociTach™ board harmonic currents.
Page 110 Diagnostics and Troubleshooting • Condensate overflow switch • Hot water may be available in the changeover coil. A high degree of protection is provided on electric heat • The connection to analogue input 1 on the Tracer® ZN units. If electric heat fails to actuate, it may be because of controller may be reversed in polarity.
Page 111 Controls Schematic, VUV - CSTI with DX Coils and Electric Heat 2311-4301 Controls Schematic, VUV - Symbio™ 400-B with Standard Coils 4619-3723 Controls Schematic, VUV - Symbio™ 400-B with Isolation Valves and face and Bypass 4619-3724 Controls Schematic, VUV - Symbio™ 400-B with DX Coils 4619-3725...
Page 112 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

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