Trane VariTrac VAV-SVN03A-EN Installation Manual
  1. Manuals
  2. Brands
  3. Trane Manuals
  4. Control Panel
  5. VariTrac VAV-SVN03A-EN
  6. Installation manual

Trane VariTrac VAV-SVN03A-EN Installation Manual

Central control panel
Hide thumbs
Table of Contents

Advertisement

Quick Links

Installation Manual
™
VariTrac
Central Control Panel
June 2002
VAV-SVN03A-EN

Advertisement

Table of Contents
loading

Related Manuals for Trane VariTrac VAV-SVN03A-EN

Summary of Contents for Trane VariTrac VAV-SVN03A-EN

  • Page 1 Installation Manual ™ VariTrac Central Control Panel June 2002 VAV-SVN03A-EN...
  • Page 2 Trane has tested the system described in this manual. However, Trane does not guarantee that the system contains no errors. 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 3: Table Of Contents

    Contents About This Manual ..........1 Contents ......................1 Compliance Information ................1 Specifications ....................1 VariTrac Changeover Bypass System ............1 Overview ....................1 Getting Started ..................1 Installing and Configuring the System ..........1 Troubleshooting ..................1 Delivered VAV System ................. 1 Overview ....................
  • Page 4 UCM Damper ....................10 Communicating Sensor/Bypass Control Assembly ........11 Relay Board Binary Outputs ................11 Wire Specifications ................... 11 Getting Started ..........13 Unpack and Inspect the Components ............. 13 Mount the Wiring Base ..................14 Mounting Requirements ................14 Location ....................
  • Page 5 Connecting PC with VariTrac Software to CCP ......... 39 Installation Checklist........41 Shipment ....................41 Unit Location ....................41 AC Power Wiring ..................41 Communicating Sensor/Bypass Assembly ..........41 Input Wiring ....................41 Output Wiring ..................... 41 VariTrac Dampers ..................42 Zone Temperature Sensors ................
  • Page 6 Delivered VAV System ........53 Overview ......................53 What is Delivered VAV? ................53 What Delivered VAV is Not ................ 53 Central Control Panel ................. 55 Unit Control Module (UCM) ..............55 VariTrane VAV Terminal Units ..............55 VariTrane VAV Terminal Unit Types ............55 Single Duct ...................

  • Page 7: About This Manual

    About This Manual Contents ™ This manual describes the steps required to install and configure VariTrac Changeover Bypass Zoning and Delivered VAV Systems. Sections in this manual are highlighted below: Compliance Information Information about FCC approval and possible radio and telephone interfer- ence, and the CE compliance statement.

  • Page 8: Naming Conventions

    About This Manual Naming Conventions The following is a list of naming conventions used in this manual: • CCP: Refers to the system Central Control Panel • VariTrac: Refers to the CCP used in a pressure dependent bypass zoning system •...

  • Page 9: Fcc Information

    FCC Information VariTrac and Delivered VAV Radio and Television Interference VariTrac and Delivered VAV generate, use, and can radiate radio frequency energy. If not installed and used in accordance with the instruction manual, interference to radio and television reception may occur. VariTrac and Delivered VAV are tested and comply with the limits for Class A computing devices in accordance with the specifications in Subpart J of Part 15 of FCC rules, to provide reasonable protection against such interference in a...
  • Page 10 FCC Information 'HFODUDWLRQ RI &RQIRUPLW\ Manufacturer’s Name: Manufacturer’s Address: Product Name: Product Number: Product Option: Electromagnetic Emission: (by Council Directive 89/336/EEC) Electromagnetic Immunity: When and where issued Mark of Compliance European Contact VAV-SVN03A-EN...

  • Page 11: Varitrac Changeover-Bypass System

    • 24 Vac power • binary inputs for an occupied/unoccupied signal and external priority shutdown signal (optional) • ICS communication bus to the Trane building automation system (op- tional) • UCM communication bus to the zone dampers and communicating ™...

  • Page 12: Communicating Sensor/Bypass Damper Control

    VariTrac Changeover-Bypass System • rectangular damper sizes are 8 x 12, 8 x 14, 8 x 16, 10 x 16, 10 x 20, and 14 x 16 inches. The damper consists of a 16 gage galvanized steel frame and opposed blade damper assembly. Communicating Sensor/Bypass Damper Control The communicating sensor/bypass damper assembly is a bypass damper and communicating sensor/bypass control that resides on the same bus as...

  • Page 13: Co 2 Sensor

    Sensor • sensor with digital display, adjustable setpoint, night setpoint override button, cancel button, and communications jack Sensor A CO sensor may be connected to the UCM damper control to sense CO levels in the space. This signal is communicated to the CCP for demand ventilation calculation and control.

  • Page 14: Varitrac Changeover Bypass System Configuration

    VariTrac Changeover-Bypass System Figure 2: VariTrac Changeover Bypass System Configuration VAV-SVN03A-EN...

  • Page 15: Specifications

    Specifications VariTrac Central Control Panel F ° , F ° F ° , F ° “ ” . “ ” . y l VAV-SVN03A-EN...

  • Page 16: Operator Display

    Specifications Operator Display F ° F ° F ° F ° UCM Damper F ° F ° F ° F ° “ ” . VAV-SVN03A-EN...

  • Page 17: Communicating Sensor/Bypass Control Assembly

    Communicating Sensor/Bypass Control Assembly Communicating Sensor/Bypass Control Assembly F ° F ° F ° F ° “ ” . Relay Board Binary Outputs Voltage provided: 24 Vac from air conditioning unit Current: 10 VA maximum Wire Specifications Shielded Level 4 communication wire is now recommended for all commu- nication link wiring on the new VariTrac CCP .
  • Page 18 Specifications Table 1: Communication Link Wire Specifications " 9 " 5 " 6 • • • ° 0 ° 5 • , l i i l i . t f . t f c i l ® VAV-SVN03A-EN...

  • Page 19: Getting Started

    Getting Started Familiarize yourself with the system components and preview the installation procedures before installing and configuring the VariTrac system. Installation and configuring procedures appear in suggested order of performance: • Unpack and inspect the components • Mount the wiring base •...

  • Page 20: Mount The Wiring Base

    Getting Started Mount the Wiring Base Figure 3: Termination module conduit access and mounting holes Conduit access Conduit connector (three places) Holes for mounting on a 2 in. x 4 in. conduit box horizontally (left and right) Two holes for mounting on a wall (one on each side) Termination board Holes for mounting on a 2 in.

  • Page 21: Secure Termination Module Wall

    Secure Termination Module to Wall The VariTrac Central Control Panel should be easily accessible for making wiring connections and for servicing. Provide two inches of clearance on the left and right sides, and sufficient clearance above the unit to make conduit connections.

  • Page 22: Secure Termination Module To Conduit Box

    Getting Started Secure Termination Module to Conduit Box 1 Remove the screws from the conduit box. 2 Line up the conduit box screw holes on the termination module (Figure 3) with the screw holes on the conduit box. 3 Install the screws. NOTE: When mounting the termination module to a 4 in.

  • Page 23: Wire Ac Power

    1 All customer wiring must be in acordance with Transformer national, state, and local electrical codes. Figure note 2 Trane recommends a dedicated transformer for 24 Vac power. Termination resistor Twisted pair, shielded wire 3 Do not apply voltage to the priority shutdown per Trane specifications and occupancy inputs.

  • Page 24: Ac Power Wiring

    Getting Started AC Power Wiring A dedicated 24 Vac, 30 VA Class 2 transformer is required to power the VariTrac Central Control Panel. The VariTrac Central Control Panel requires 3-wire service with a nominal voltage of 24 Vac and a utilization range of 20 to 30 Vac. All wiring must comply with the National Electrical Code and local codes.

  • Page 25: Occupied/Unoccupied Input Wiring

    Occupied/Unoccupied Input Wiring Occupied/Unoccupied Input Wiring This input closes the connection between TB2-8 and TB2-9. This is most likely from an external time clock, but any other device allowing a dry contact connection may be used. When the connection is open, the VariTrac Central Control Panel operates in the occupied mode.

  • Page 26: Install The Bypass Dampers And Communicating Sensor/Bypass Control Assembly

    Getting Started Figure 7: Binary Output Wiring for Optional Relay Board Termination Board TB1 2H/2C 24 V* 24 V* FAN COMP1 COMP2 EM HT Ht. Pump *24 Vac from the rooftop unit. For single transformer systems, connect Rc to Rh. For two transformer systems, connect the cooling transformer to RC and the heating transformer to Rh.

  • Page 27: Bypass Damper Wiring

    Bypass Damper Wiring Bypass Damper Wiring The interconnect cable is pre-wired to the bypass damper and may be lengthened if necessary. IMPORTANT Mounting screws must be located towards the ends of the damper when hanging straps are used to avoid interference with the rotating damper. A label attached to the dampers indicates the acceptable areas for mounting screws.

  • Page 28: Connect The Communicating Sensor/Bypass Control Wiring

    Getting Started If the supply duct branches out at the riser, install the control in the largest supply duct. A two-inch hole is required to insert the temperature and static pressure sensor. Use the supplied gasket to seal off air leaks. Secure the sensor to the duct with a minimum of three sheet metal screws.

  • Page 29: Install The Varitrac Dampers

    Install the VariTrac Dampers Install the VariTrac Dampers A sketch of basic damper installation is shown in Figure 10. The damper may be connected with hard duct or flex duct at either end. If two bypass dampers are installed, a pigtail socket is provided on the cable so the second damper can be plugged into the UCM.

  • Page 30: Connect Ucm Wiring

    Getting Started Figure 11: Proper Damper Mounting Positions Connect UCM Wiring Connect the power to terminals TB1-1 (24V) and TB1-2 (ground). 24 Vac is required to power the UCM control. 20 Vac to 28 Vac is acceptable. Use 18 to 20 AWG for power wiring.

  • Page 31: Set The Ucm Dip Switches

    Set the UCM DIP Switches Figure 12: UCM Wiring Set the UCM DIP Switches Each device connected to the VariTrac Central Control Panel must a unique address. No two devices (of the same type) can have the same address. Table 2 lists the address settings for UCM DIP switches connected to the VariTrac Central Control Panel.

  • Page 32: Slaved Dampers

    Getting Started Table 2: DIP Switch Settings for UCM Damper Addresses DIP Switch Settings Number Addresses 25-32 used for Delivered VAV only Communicating Sensor/Bypass Control only = Off Example of Address #5 Slaved Dampers In some applications it may be desirable to control an additional damper from a single UCM.
  • Page 33 Slaved Dampers outputs of the UCM controlling the primary damper by using the BYPS damper cable assembly shipped with the BYPS damper. Refer to diagram and connect as follows: 1 Disconnect the red actuator plug from the master damper UCM. 2 Plug the red actuator connector from the BYPS damper onto the master damper UCM socket (ACT) as shown in Figure 13.

  • Page 34: Install The Zone Temperature Sensors

    Getting Started Install the Zone Temperature Sensors Five types of zone temperature sensors are available. The sensors are shown below in Figure 14: • sensor with night setback override button, cancel button, and communica- tions jack • sensor with adjustable setpoint, night setback override button, cancel button, and communications jack •...

  • Page 35: Mounting Standard And Digital Zone Temperature Sensors

    Mounting Standard and Digital Zone Temperature Sensors • areas near heat sources like equipment (appliances, computers, copiers, etc.) or concealed pipes or chimneys • dead spots behind doors, draperies, or in corners. Mounting Standard and Digital Zone Temperature Sensors Zone temperature sensors consist of two basic pieces: the base and cover. Externally adjustable versions have an external adjustment knob.

  • Page 36: Zone Temperature Sensor Wiring

    Getting Started 2 Using two #6-32 screws, fasten the base to the junction box’s threaded mounting holes. 3 Connect the control wires to the proper terminals on the temperature sensor (See Figure 15). 4 Replace the sensor cover. Zone Temperature Sensor Wiring A zone temperature sensor designed specifically for UCM damper control must control each unit.
  • Page 37 Zone Temperature Sensor Wiring 2. 3 wires are required for sensor connection. 2 wires are required for 24 Vac power connection. For wire lengths less than 75 feet, an 18 gage, 5 conductor cable may be used. For wire lengths greater than 75 feet, use 18 gage, 2 conductor cable for the power wiring (TB1-TB1), and 18 gage, 3 conductor cable for signal wiring (TB2-TB3).

  • Page 38: Communication Link Wiring

    • Communication link wiring must be Level 4 22 AWG twisted, shielded pair wire (meets or exceeds Trane specifications. See wiring specifications sections in this manual for further information). • The maximum total wire length is 3,500 feet for the communication link.
  • Page 39 UCM Dampers UCM Dampers UCM Dampers UCM Dampers Each Voyager/Reliatel Rooftop requires a Trane communications interface (TCI) board for connection to the VariTrac Central Control Panel communication link. Refer to the TCI installation manual for more information on connecting a rooftop to the communication link.
  • Page 40 Getting Started Figure 17: UCM Communication Link Wiring VAV-SVN03A-EN...
  • Page 41 Voyager Communication Link Wiring Figure 18: Voyager Communication Link Wiring VariTrac Communications Interface (Comm4) Comm Termination Details for Voyager RTU Voyager (UPC) Unit Control Panel (TCI-V) Figure Notes 1 All dip switches off. 2 Comm board to non-isolated Comm3 or Comm4 option. VAV-SVN03A-EN...

  • Page 42: Mount Main Module

    Getting Started Figure 19: Precedent Communication Link Wiring VariTrac Communications Interface (Comm4) Comm Termination Details for Voyager RTU Trane Communication Interface-Precedent (TCI-P) Precedent (UCP) Figure Notes Unit Control Panel 1 All dip switches off. 2 Comm board to non-isolated Comm3 or Comm4 option.

  • Page 43: Install Operator Display (Optional)

    Mounting Main Module Figure 20: Mounting Main Module Termination module Main module Alignment pin (four places) IMPORTANT Do not use excessive force when mounting the module. If the module does not snap easily into place, slightly reposition it on the alignment pins. Failure to comply may cause damage to the module.

  • Page 44: Connecting Modem Devices

    If 24 Vac is applied, the operator will turn on and display data. Connecting Modem Devices Remote communications may be accomplished through a Trane building management system or with stand-alone modem attached to a single CCP via the RS-232 port.

  • Page 45: Connecting Pc With Varitrac Software To Ccp

    Connecting Modem Devices Figure 22: Modular Adapters, Cable, and Connections for External Modems Termination module bottom view RJ-12 port (PC direct connection) RJ-12 port for PC direct connection (bottom side) To modem serial port RJ-12 cable (PN: 35914260) Connect RJ-12 to 25-pin male adapter (PN: 35914269)
  • Page 46 Getting Started Figure 23: Typical VariTrac Central Control Panel to PC serial port connec- tions Termination module bottom view RJ-12 port (PC direct connection) RJ-12 port for PC direct connection (bottom side) Connect RJ-12 to 9-pin female adapter (PN: 35914262) To PC serial port RJ-12 cable...

  • Page 47: Installation Checklist

    Installation Checklist Complete this checklist as the VariTrac Central Control Panel is installed to verify that all recommended procedures are performed. This checklist does not replace the detailed instructions provided in the manual. Read the entire manual carefully to become familiar with the installation procedures before installing the unit.

  • Page 48: Varitrac Dampers

    Installation Checklist VariTrac Dampers o UCM dampers mounted and secure according to recommendations. Zone Temperature Sensors o Sensors are properly mounted and wired per instructions and in the correct space. UCM Wiring o UCM power is properly wired to TB1-1 and TB1-2. NOTE: TB1-2 is COMMON (case ground) if grounded secondary transformers are being used.

  • Page 49: System Start-Up And Checkout

    System Start-Up and Checkout Pre-power-Up Checkout Central Control Panel • Measure the supply voltage to the CCP TB2-1 and TB2-2. The supply voltage should be between 20 Vac and 30 Vac. • Assure that a reliable ground is attached to TB2-3 on the CCP . •...

  • Page 50: Occupied Mode

    System Start-Up and Checkout • Verify that the proper unit address is set on each UCM. Occupied Mode After the system is completely wired and installed it is ready for the initial power-up. Upon power-up the CCP and UCMs will initiate the sequence of events that follows.

  • Page 51: Green Led

    UCM LEDs Green LED Yellow LED VAV-SVN03A-EN...
  • Page 52 System Start-Up and Checkout VAV-SVN03A-EN...

  • Page 53: Tests And Troubleshooting

    Tests and Troubleshooting Displayed Failures Static Sensor Calibration Failure If static sensor calibration fails, the CCP uses 0.50 inch wg as the static pressure setpoint. The zone dampers continue to control normally. Failed static sensor calibration may indicate that the position or location of the sensor is not correct.

  • Page 54: Zone Sensor Failure

    Tests and Troubleshooting Zone Sensor Failure If the zone sensor fails, the damper drives to minimum position, and its vote is excluded. Zone Setpoint Failure If a setpoint fails, the UCM automatically uses the edited occupied cooling and heating setpoints. Auxiliary Sensor Failure If the auxiliary sensor circuit opens, the temperature reading on the display screen reads and a diagnostic is be displayed on the operator display and...
  • Page 55 Zone, Auxiliary and System Temperature Sensor Checkout Table 4: Temperature Resistance Table VAV-SVN03A-EN...

  • Page 56: Ucm Local Heat Checkout

    Tests and Troubleshooting UCM Local Heat Checkout Turn the adjustable zone sensor to full heating, or adjust the temperature setpoints at the CCP . IMPORTANT Model DCEA local heat outputs are disabled in the heating control action. Model DCWA local heat outputs are enabled in the heating or cooling control action.

  • Page 57: Static Pressure Sensor Input Test

    This test can energize the fan and both stages of heating and cooling at the rooftop unit. Before starting this test make sure that all persons, tools, etc. are clear. System Troubleshooting Contact your Trane representative for problems that cannot be resolved using these guidelines. VAV-SVN03A-EN...
  • Page 58 Tests and Troubleshooting VAV-SVN03A-EN...

  • Page 59: Delivered Vav System

    Delivered VAV System Overview What is Delivered VAV? Delivered VAV is a small tonnage VAV system made up of three Trane prod- uct families. It is the combination of: • Voyager Commercial 27 ½ to 50 ton VAV Packaged Rooftop Unit •...
  • Page 60 Delivered VAV System Figure 24: Delivered VAV System Configuration VAV-SVN03A-EN...

  • Page 61: Central Control Panel

    • binary inputs for an occupied/unoccupied signal and external priority shutdown signal (optional) • ICS communication bus to the building automation system (optional) • UCM communication bus to the VAV boxes and Trane Voyager commercial 27 ½ - 50 ton VAV rooftop unit Unit Control Module (UCM) A unit control module is mounted to each individual VAV terminal unit.

  • Page 62: Auxiliary Temperature Sensor

    Delivered VAV System The local series fan within the terminal unit operates whenever the unit is in the occupied mode. The volume of air delivered to the VAV zone is constant, but the temperature of the delivered air varies. As the zone requires less cooling, the primary air damper closes.

  • Page 63: Getting Started

    • Communication link wiring must be Level 4 22 AWG twisted, shielded pair wire (meets or exceeds Trane specifications. See wiring specifications sections in this manual for further information). • The maximum total wire length is 3,500 feet for the communication link.
  • Page 64 Getting Started At the VariTrac Central Control Panel, the communication link wires must be connected to Terminals TB2-10 (+) and TB2-11 (−). Refer to Figure 26. This connection is polarity sensitive. IMPORTANT Connections between lengths of link wiring should be soldered and taped. Wire nuts are not acceptable.
  • Page 65 VAV Terminal Unit VAV Terminal Unit VAV Terminal Unit Each Voyager VAV Rooftop requires a Trane communications interface (TCI) board for connection to the VariTrac Central Control Panel communication link. Refer to the TCI installation manual for more information on connecting a rooftop to the communication link.
  • Page 66 Getting Started Figure 26: UCM Communication Link Wiring VAV-SVN03A-EN...
  • Page 67 Voyager Communication Link Wiring Figure 27: Voyager Communication Link Wiring VariTrac Communications Interface (Comm4) Comm Termination Details for Voyager RTU Voyager (UPC) Unit Control Panel (TCI-V) Figure Notes 1 All dip switches off. 2 Comm board to non-isolated Comm3 or Comm4 option. VAV-SVN03A-EN...
  • Page 68 Getting Started VAV-SVN03A-EN...

  • Page 69: Installation Checklist

    Installation Checklist Complete this checklist as the VariTrac Central Control Panel is installed to verify that all recommended procedures are performed. This checklist does not replace the detailed instructions provided in the manual. Read the entire manual carefully to become familiar with the installation procedures before installing the unit.

  • Page 70: Communication Link Wiring

    Installation Checklist o Confirm voltage present between 20 Vac and 28 Vac. o Ensure that the sensor is properly terminated. o If optional local heat is being used, confirm wiring per appropriate diagram. Communication Link Wiring o Field installed communications wiring complies with all applicable codes. o VariTrac Central Control Panel communication link wiring to VAV UCMs and Voyager VAV rooftop unit is connected at TB2-10, TB2-11, and TB2-12 on the CCP .
  • Page 71 For more information contact Trane has a policy of continuous product and product data improvement and reserves the right to change your local district office or design and specifications without notice. Only qualified technicians should perform the installation and e-mail us at comfort@trane.com...

This manual is also suitable for:

Varitrac x13650940010Varitrac x13650942010

Table of Contents