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Zonex DigiTract 4-2 Installation Manual

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Installation Guide
DigiTract 4-2
Two Stage Heat/Cool
Comfort Control System
Zoning Systems
That's all we do.
Part #DT4MAN
Rev. April 2003

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Summary of Contents for Zonex DigiTract 4-2

  • Page 1 Installation Guide DigiTract 4-2 Two Stage Heat/Cool Comfort Control System Zoning Systems That’s all we do. Part #DT4MAN Rev. April 2003...

  • Page 2: Table Of Contents

    Status Lights .......................................9 Components .....................................10 CAPACITY CONTROLLERS.....................................11 Gas/Electric DTGE4-2..................................11 Heat Pump DTHP4-2..................................11 Calibration .......................................11 LAS Installation ....................................11 ZONE THERMOSTATS Types ........................................12 Zonex Systems Gas/Electric Models..................................12 Digital (SADIGI)....................................12 Digital (SADIGI) Operation ................................13 Programmable (101PROG)................................12 Communicating (DIGICOM/DIGIHP)..............................12 Compatibility ........................................12 ZONE DAMPERS Round ........................................14-15 Rectangular.........................................16-17 Installation Notes......................................18...

  • Page 3: Introduction

    INTRODUCTION The Zonex Systems Digitract 4-2 zoning system enables up to four room thermostats to control a single HVAC system. This permits superior building temperature control over a standard single thermostat. To provide economical, effective and simplified remote control and monitoring capability of one or more Digitract 4-2 zone control systems, the ZonexCommander may be used to manage up to 80 thermostat schedules.

  • Page 4: Component Selection Guide

    Digitract 4-2 COMPONENT SELECTION GUIDE START HEAT PUMP GAS/ELECTRIC SYSTEM CONTROLLER SYSTEM CONTROLLER (DTGE4-2) (DTHP4-2) 2-Stage Heat/Cool 3-Stage Heat/2-Stage Cool CAPACITY CONTROLLER CAPACITY CONTROLLER System Controller includes Capacity Control and Leaving Air Sensor System Controller includes Capacity Control and Leaving Air Sensor HEAT PUMP THERMOSTATS (One per zone.
  • Page 5 Use minimum 18 gauge for all wiring. All wiring must meet state and local codes. Zone damper terminals. Refer to “Wiring – Zone Dampers” section, pg. 5. BYPASS DIGITRACT 4-2 GE TWO STAGE 220108 JPR1 AIR FLOW Vx.x DPR1 DPR2 DPR3 DPR4...
  • Page 6 WIRING – HEAT PUMP DTHP4-2 DigiTract 4-2 HP 3-Stage Heat/2-Stage Cool BYPASS AIR FLOW DIGITRACT 4-2 HP TWO STAGE 210806 JPR1 Vx.x DPR1 DPR2 DPR3 DPR4 STAT 1 STAT 2 STAT 3 STAT 4 O/B R Y G C O/B R Y G C...
  • Page 7 Method 2: If wiring more than three TR series dampers to a zone, use method 2. This method requires a 24V ac, SPNO relay. Method 1: Wiring Up to Three TR Series Dampers to a Zone SERIES DIGITRACT 4-2 DAMPER SYSTEM CONTROLLER...

  • Page 8: System Controllers

    SYSTEM CONTROLLERS The DigiTract 4-2 System Controller is the heart of the Digitract 4-2 are opposing calls. The built in Capacity Controller maintains the supply zoning system. It is an auto changeover, home run system with a built in air temperature within an operating range to prevent freeze ups and staging and capacity controller.

  • Page 9: Components

    Occasionally software upgrades Cool call. When energized (Y made to R), may become available. If so, the Digitract 4-2 software can be field requests the Digitract 4-2 to run in cool mode. upgraded by changing this microcontroller.

  • Page 10: Heat Pump Dthp4-2

    SYSTEM CONTROLLER – HEAT PUMP DTHP4-2 OPERATION The System Controller will initially run in the mode requested by the first Purge mode – When all calls are satisfied or before changing modes, calling zone thermostat. the System Controller will go into a 3-minute purge cycle. During this mode the compressor and indoor blower will deenergize.
  • Page 11 B = On when reversing valve jumper is in B position C = On when auxiliary heat is energized 1 = One or more damper LEDs on 0 = All damper LEDs are off COMPONENTS DTHP4-2 DIGITRACT 4-2 HP TWO STAGE 210806 JPR1 Vx.x DPR1 DPR2 DPR3 DPR4 STAT 1...

  • Page 12: Components

    Digitract 4-2 and thermostats. When ON, power an indicator light on thermostat 1. This feature is not available from the heat pump transformer is supplied to the Digitract 4-2 and on all heat pumps and/or thermostats.

  • Page 13: Capacity Controllers

    HVAC unit could freeze up or overheat. To compensate the air temperature has returned within operating range. Additionally, for for this, the Digitract 4-2 is furnished with a built in Capacity Controller. heat pumps the Capacity Controller will turn on the heat pump auxiliary heat if the coil leaving air temperature is not hot enough in heat mode.

  • Page 14: Gas/Electric Dtge4-2

    See Thermostat Compatibility section below. ZONEX SYSTEMS THERMOSTATS Zonex Systems offers three thermostat models that can be used with the Gas/Electric Digitract 4-2 System Controller (DTGE4). These models are SADIGI, 101PROG and DIGICOM. SADIGI: The SADIGI is a single stage gas/electric, hard wired (non-power robbing) thermostat. It can control one heat, one cool and blower fan.
  • Page 15 SADIGI THERMOSTAT OPERATING INSTRUCTIONS SLIDE SWITCHES There are two switches located on the bottom of the thermostat. The switch on the left controls the fan and the switch on the right powers the thermostat. Sliding the fan switch to the left turns the indoor blower fan on continuously.

  • Page 16: Zone Dampers

    1.75” differential pressure on any system over 5 tons. ROUND LOW PRESSURE ZONE DAMPERS (TR diam) Zonex Systems round low pressure zone dampers can be used for systems up to 5 tons with a maximum differential static pressure of 0.5”. These are two position, spring open, power close dampers for very simple operation.

  • Page 17: Round

    ZONE DAMPERS ROUND LOW & MEDIUM PRESSURE DAMPER SIZES ROUND LOW PRESSURE DAMPER SIZE DIAMETER (D) LENGTH (L) WIDTH (W) PART # 6" 6" 10" 9" TR06 7" 7" 10" 10" TR07 8" 8" 10" 11" TR08 9" 9" 11" 12"...
  • Page 18 RECTANGULAR MEDIUM PRESSURE ZONE DAMPERS (101MRTD W x H) Zonex Systems rectangular medium pressure dampers are recommended for systems under 7.5 tons with a maximum differential static pressure of 1”. These are power open, power close dampers. They are constructed from heavy duty aluminum and stainless steel. The damper is an opposed blade type that slips into a 3-1/4”...
  • Page 19 ZONE DAMPERS LOW AND MEDIUM PRESSURE RECTANGULAR DAMPER DIMENSIONS Part Number TREC W x H and 101MRTD W x H 2-1/4" Sizes available from 8” x 6” up to 24” x 20”. 5" 2-1/2" HEAVY DUTY RECTANGULAR DAMPER DIMENSIONS Part Number 101CD W x H Sizes available from 8”...

  • Page 20: Installation Notes

    Select damper size by using a duct sizing table or calculator. For new systems or retrofit jobs: c) Select a Zonex Systems damper to fit the duct size selected for that zone. a) Determine CFM from heat gain or loss calculations.

  • Page 21: Barometric

    BYPASS DAMPERS – BAROMETRIC INSTALLATION BAROMETRIC BYPASS SETUP a) Turn off all thermostats. The round barometric bypass damper can be installed in any position. b) Turn on Switching Center/Controller and set fan switch to “ON” This damper is factory set for horizontal installation and can be field position.

  • Page 22: Electronic

    BYPASS DAMPERS – ELECTRONIC ELECTRONIC BYPASS DAMPERS Bypass dampers are used to provide constant air delivery through the air handling unit. This is done by bypassing excess air from the supply duct back to the return duct. As a zone is satisfied its zone damper closes. When this happens, the bypass damper opens just enough to bypass the excess air.

  • Page 23: Electronic

    BYPASS DAMPERS – ELECTRONIC RECTANGULAR BYPASS SELECTION TABLE WIDTH IN INCHES 833 1000 1167 1333 1500 1667 1833 2000 2333 2667 3000 3333 3667 4000 833 1042 1250 1458 1667 1875 2083 2292 2500 2917 3333 3750 4167 4583 5000 1000 1250 1500 1750 2000 2250 2500 2750...

  • Page 24: Static Pressure Controller

    As the zone dampers close, the static pressure increases. When this happens, the static pressure controller opens the bypass damper to bring the static pressure back to the setpoint. Zonex Systems recommends de-energizing the bypass damper when the STATIC PRESSURE CONTROLLER DESCRIPTION blower fan turns off.

  • Page 25: Damper Transformer

    DAMPER TRANSFORMER The 24V transformer connected to TR1 and TR2 of the Digitract 4-2 the amperage rating of the fuse, use the table below. If using a System Controller powers the zone dampers. The power rating of the combination of spring open and power open dampers, size as if all transformer must be sufficient to power the number of dampers used.
  • Page 26 STARTUP TEST, GAS/ELECTRIC DTGE4 (Continued) 15. At System Controller: b-2 Set to Cool mode. a. Verify Y, G and PWR lights are on. If not cycle System Controller b-3 Set Fan switch to Auto mode. power switch OFF and then ON and recheck. b-4 Set cool setpoint several degrees below room b.

  • Page 27: Troubleshooting / Service Checks

    Replace controller, check 24 V AC DIGITRACT 4-2 LAS VOLTAGE – TEMPERATURE CONVERSION CHART Using a digital volt-ohm meter, place the red lead on the + terminal and the black lead on the - terminal of the equipment terminal strip. Set the voltmeter to the 20VDC scale, and con- vert the measured voltage to its corresponding temperature.
  • Page 28 Zoning Visit our Web Site http://www.hvaccomfort.com E-mail us at calecon@hvaccomfort.com PATENTED PRODUCT Zonex Systems reserves the right to discontinue, or change at any time, Part #DT4MAN specifications or designs without notice and without incurring obligations. Rev. April 2003 Copyright 2003 by Zonex Systems...

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