Zonex DigiTract 4-2 - User Manual

Questions and Answers

B
Brian HaynesAug 1, 2025
Why will my Zonex Control Systems not initiate a cooling cycle?
- Y
  Yvette CarrollAug 1, 2025
  If your Zonex Control Systems unit will not initiate a cooling cycle, there could be several reasons: * The controller might be in heat mode or in changeover from heat mode. Try cycling power to the controller and verify that the thermostat inputs are correct. If the problem continues, consider replacing the controller. * The thermostat may have a cooling anticipator (compensator), requiring controller replacement. * Insufficient airflow over the evaporator can cause this issue; isolate and correct the airflow problem. * A bypass damper opening prematurely can also prevent cooling. Adjust the bypass damper to remain closed when all zone dampers are open. * Finally, the LAS might be out of calibration, which requires recalibration.
S
Shelley ChanAug 5, 2025
What to do if cooling calls short cycle in Zonex DigiTract 4-2?
- A
  andersonannaAug 6, 2025
  If your Zonex Control Systems experience cooling calls that short cycle, it could be due to several factors related to the LAS (Load Air Sensor): * The LAS polarity may be incorrect. Ensure the red lead is connected to the + terminal and the white lead to the – terminal. * The LAS might be shorted. Check for 0V dc on the + and – terminals with the LAS installed; if shorted, replace the LAS. * The LAS wiring may be shorted. Again, check for 0V dc on the + and – terminals with the LAS installed; if the wiring is shorted, repair it. * A controller failure could also be the cause. If you measure 0V dc on the + and – terminals with the LAS removed, replace the controller.
S
Scott BrownAug 10, 2025
Why won't my Zonex DigiTract 4-2 initiate heat calls?
- F
  frankdickersonAug 11, 2025
  If your Zonex Control Systems unit will not initiate heat calls, there are several potential causes: * The controller might be in cool mode or in changeover from cool mode. Try cycling the power to the controller and verify the thermostat inputs. If the problem persists, consider replacing the controller. * The heating anticipator may be incorrectly set. Set the anticipator to the lowest setting. * A bypass damper opening prematurely can interfere with heating. Adjust the bypass damper closed with all zone dampers open. * The LAS may be out of calibration, requiring recalibration.
C
Christopher ChenAug 16, 2025
Why does the blower run continually on my Zonex Control Systems?
- M
  Melissa DiazAug 16, 2025
  If the blower in your Zonex Control Systems runs continually, it could be due to: * Fan operation being selected on any thermostat. Verify the fan switch position on all thermostats. * The fan relay contacts in the controller being seized. If this is the case, replace the controller.
J
Jose FullerAug 20, 2025
What to do if zone dampers will not close in Zonex DigiTract 4-2?
- M
  Michael StephensAug 21, 2025
  If the zone dampers in your Zonex Control Systems will not close, it could be due to: * Loss of 24V ac on TR1 and TR2. Repair the power source. * The transformer VA being too low. Replace it with a transformer that has the correct VA rating. * Incorrect damper wiring. Correct the damper wiring. * A shorted Triac, resulting in continuous 24V ac at the damper terminals. If this is the case, replace the controller.
S
Stacy LongAug 26, 2025
How to fix all thermostats that will not call in Zonex DigiTract 4-2 Control Systems?
- R
  Rachel WeberAug 27, 2025
  If all thermostats in your Zonex Control Systems are not calling, it is likely due to a loss of 24V ac on R and C. You should repair the power source to resolve this issue.

Summary

INTRODUCTION

SYSTEM DESCRIPTION

Details the main components of the DigiTract 4-2 zoning system.

COMPONENT SELECTION GUIDE

WIRING - GAS;ELECTRIC DTGE4-2

WIRING - HEAT PUMP DTHP4-2

WIRING - ZONE DAMPERS

ZONE DAMPER WIRING METHODS

Explains three methods for wiring zone dampers based on system requirements.

SYSTEM CONTROLLERS

GAS;ELECTRIC DTGE4-2 OPERATION AND STATUS

Details operational modes, status LEDs, and components for the DTGE4-2 controller.

SYSTEM CONTROLLER - HEAT PUMP DTHP4-2

OPERATION AND STATUS

Details operational modes and status LEDs for the DTHP4-2 controller.

SYSTEM CONTROLLER - HEAT PUMP DTHP4-2 COMPONENTS

STAGING AND CAPACITY CONTROL

COOLING AND HEAT OPERATION MODES

Details cooling and heating operations for both system types.

CAPACITY CONTROLLER CALIBRATION AND INSTALLATION

Instructions for calibrating and installing the capacity controller and LAS.

ZONE THERMOSTATS

THERMOSTAT TYPES AND COMPATIBILITY

Lists compatible thermostat types and guidelines for non-Zonex models.

SADIGI THERMOSTAT OPERATING INSTRUCTIONS

OPERATING MODES AND SETPOINTS

Explains SADIGI thermostat modes, slide switches, and setpoint adjustments.

ZONE DAMPERS

RECTANGULAR DAMPER TYPES AND DESCRIPTIONS

Details low, medium, and heavy duty rectangular zone dampers.

ZONE DAMPERS SIZES

ROUND DAMPER DIMENSIONS AND CAPACITIES

Provides dimensional data and capacities for round zone dampers.

ZONE DAMPERS

RECTANGULAR DAMPER DIMENSIONS AND CAPACITIES

Provides dimensions and capacities for rectangular zone dampers.

ZONE DAMPERS DIMENSIONS

ZONE DAMPER SIZING AND INSTALLATION

BYPASS DAMPERS OVERVIEW

Introduction to barometric and electronic bypass dampers for airflow control.

BYPASS DAMPERS - BAROMETRIC

INSTALLATION, SETUP, AND TESTING

Covers installation, setup, and startup testing for barometric bypass dampers.

BYPASS DAMPERS - ELECTRONIC

ELECTRONIC BYPASS DAMPER SELECTION

Details on sizing electronic bypass dampers via CFM calculation and selection tables.

BYPASS DAMPERS - ELECTRONIC

RECTANGULAR SELECTION AND SLAVING

Rectangular bypass selection table, position indicator, and slaving bypass dampers.

BYPASS DAMPER - STATIC PRESSURE CONTROLLER

STATIC PRESSURE CONTROLLER FUNCTION AND SETUP

Details the controller's description, installation, setup, and checkout procedures.

DAMPER TRANSFORMER

STARTUP TEST - GAS;ELECTRIC DTGE4-2

Step-by-step procedure for testing the Gas/Electric DTGE4-2 system startup.

STARTUP TEST - HEAT PUMP DTHP4 & DTHP4-2

TROUBLESHOOTING AND SERVICE CHECKS

LAS VOLTAGE-TEMPERATURE CONVERSION CHART

Chart to convert LAS voltage readings to temperature for diagnostic purposes.

Zonex DigiTract 4-2 Specifications

General

Zones Supported	4
Stages Supported	2
Wiring	Screw Terminals
Number of Outputs	4
Protection Class	IP20
Operating Temperature	0° to 50°C
Description	Zonex DigiTract 4-2 is a digital control system designed for managing multiple zones and stages in various applications.

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Zonex DigiTract 4-2 - User Manual

Table of Contents

Questions and Answers

Summary

INTRODUCTION

SYSTEM DESCRIPTION

COMPONENT SELECTION GUIDE

WIRING - GAS;ELECTRIC DTGE4-2

WIRING - HEAT PUMP DTHP4-2

WIRING - ZONE DAMPERS

ZONE DAMPER WIRING METHODS

SYSTEM CONTROLLERS

GAS;ELECTRIC DTGE4-2 OPERATION AND STATUS

SYSTEM CONTROLLER - HEAT PUMP DTHP4-2

OPERATION AND STATUS

SYSTEM CONTROLLER - HEAT PUMP DTHP4-2 COMPONENTS

STAGING AND CAPACITY CONTROL

COOLING AND HEAT OPERATION MODES

CAPACITY CONTROLLER CALIBRATION AND INSTALLATION

ZONE THERMOSTATS

THERMOSTAT TYPES AND COMPATIBILITY

SADIGI THERMOSTAT OPERATING INSTRUCTIONS

OPERATING MODES AND SETPOINTS

ZONE DAMPERS

RECTANGULAR DAMPER TYPES AND DESCRIPTIONS

ZONE DAMPERS SIZES

ROUND DAMPER DIMENSIONS AND CAPACITIES

ZONE DAMPERS

RECTANGULAR DAMPER DIMENSIONS AND CAPACITIES

ZONE DAMPERS DIMENSIONS

ZONE DAMPER SIZING AND INSTALLATION

BYPASS DAMPERS OVERVIEW

BYPASS DAMPERS - BAROMETRIC

INSTALLATION, SETUP, AND TESTING

BYPASS DAMPERS - ELECTRONIC

ELECTRONIC BYPASS DAMPER SELECTION

BYPASS DAMPERS - ELECTRONIC

RECTANGULAR SELECTION AND SLAVING

BYPASS DAMPER - STATIC PRESSURE CONTROLLER

STATIC PRESSURE CONTROLLER FUNCTION AND SETUP

DAMPER TRANSFORMER

STARTUP TEST - GAS;ELECTRIC DTGE4-2

STARTUP TEST - HEAT PUMP DTHP4 & DTHP4-2

TROUBLESHOOTING AND SERVICE CHECKS

LAS VOLTAGE-TEMPERATURE CONVERSION CHART

Zonex DigiTract 4-2 Specifications

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