General Assist Technical Reference
UTY-CDRXZC / UTY-CDRXZD Zone Controller
Initial configuration, zone setup and function settings
For 2-wire zone controller systems managing multiple dampers and temperature sensors on a single indoor unit
The UTY-CDRXZC and UTY-CDRXZD controllers manage multiple conditioned zones connected to one indoor unit. Correct zone, sensor and outlet configuration is required to achieve stable temperature control and correct damper operation.
Important: Complete all zone, group and sensor associations before changing the zone function settings. Incorrect configuration may cause inaccurate room temperature control or unexpected damper operation.
1. Preparation
Before configuring the zone controller, confirm the following:
| 1 | The indoor unit and zone controller are correctly connected using the approved 2-wire remote-controller circuit. |
| 2 | The indoor unit's Room Temperature Sensor Switching setting is configured to Both. |
| 3 | All zone dampers, optional sensors and associated wiring are installed and identified. |
| 4 | The number of outlets or dampers serving each zone has been confirmed from the duct design. |
Sensor requirement: Where the primary or secondary controller sensor is enabled, the indoor unit sensor setting must remain set to Both so the system can use the controller and indoor-unit temperature inputs correctly.
2. Initial zone setup
Zone temperature sensor selection
Assign the required temperature sensor to each zone through:
Zone Setting → Zone Temp. Sensor Selection
Complete the sensor assignment for Zones 1-8. Confirm that every active zone has an appropriate sensor source.
Zone group setting
Up to four zone groups can be created. Allocate Zones 1-8 to the required groups and nominate a priority sensor for each group where applicable.
Zone and sensor naming
| Setting | Purpose | Example |
|---|---|---|
| Zone Name Setting | Identifies each conditioned area on the controller. | Living, Bedroom 1, Office |
| Sensor Name Setting | Identifies Sensors 1-11 according to their installed location. | Hall Sensor, Master Bedroom |
3. Accessing zone function settings
Menu → Maintenance → Zone Function Setting
| 1 | Select the required Function Number. |
| 2 | Select the required Setting Number. |
| 3 | Press OK to save the setting. |
| 4 | Record the Function Number and Setting Number on the commissioning sheet. |
4. Zone function setting list
| Function | Function No. | Setting No. | Default | Application |
|---|---|---|---|---|
| Primary controller sensor | 7 | 0 = Disable 1 = Enable | 0 | Enable when the primary controller temperature sensor is required. |
| Secondary controller sensor | 8 | 0 = Disable 1 = Enable | 0 | Enable when the secondary controller temperature sensor is required. |
| Number of outlets | 11-19 | 0-10 outlets | 1 | Sets the number of dampers or outlets connected to each zone and the common outlet. |
| Spring-return damper | 20 | 0 = Not in use 1 = In use | 0 | Select In use when spring-return dampers are installed. |
| Optional sensor connection | 31-38 | 0 = Not in use 1 = In use | 0 | Enables optional sensors for Zones 1-8. |
| Temperature correction - cooling | 41-48 | 00-16 | 00 | Applies a temperature correction to each zone during cooling. |
| Temperature correction - heating | 51-58 | 00-16 | 00 | Applies a temperature correction to each zone during heating. |
Number of outlets - example
| Zone | Function No. | Setting No. | Configured outlets |
|---|---|---|---|
| Zone 1 | 11 | 4 | 4 |
| Zone 2 | 12 | 2 | 2 |
| Zone 3 | 13 | 1 | 1 |
| Zone 4 | 14 | 0 | None |
| Common outlet | 19 | 1 | 1 |
Airflow configuration: The outlet setting must reflect the actual duct and damper arrangement. Do not use the example values unless they match the installed system.
5. Room temperature correction
Cooling functions 41-48 and heating functions 51-58 allow individual zone temperature correction from +4.0 °C to -4.0 °C.
| Setting No. | Correction | Setting No. | Correction |
|---|---|---|---|
| 00 | 0.0 °C | 09 | -0.5 °C |
| 01 | +4.0 °C | 10 | -1.0 °C |
| 02 | +3.5 °C | 11 | -1.5 °C |
| 03 | +3.0 °C | 12 | -2.0 °C |
| 04 | +2.5 °C | 13 | -2.5 °C |
| 05 | +2.0 °C | 14 | -3.0 °C |
| 06 | +1.5 °C | 15 | -3.5 °C |
| 07 | +1.0 °C | 16 | -4.0 °C |
| 08 | +0.5 °C | — | — |
Do not use temperature correction to compensate for poor sensor location. First check for direct sunlight, wall heat transfer, supply-air influence, draughts or poor room-air circulation.
6. Commissioning verification
| 1 | Operate each zone individually and confirm the correct damper opens and closes. |
| 2 | Confirm every active zone displays the expected temperature sensor reading. |
| 3 | Confirm grouped zones respond correctly to the nominated priority sensor. |
| 4 | Verify the number-of-outlets settings match the installed damper arrangement. |
| 5 | Run the system in heating and cooling and confirm stable temperature control. |
| 6 | Record all Function Numbers, Setting Numbers, zone names and sensor assignments on the commissioning documentation. |
Escalation information: When requesting technical assistance, provide the indoor unit model, controller model, zone layout, sensor assignments, outlet counts and a list of all modified function settings.