Installing a relay kit on your Reznor UBX Unit Heater allows you to control multiple heaters with a single thermostat or time clock, enhancing efficiency. Here's a step-by-step guide:
- Safety First Turn OFF Gas and Electricity: Before you begin, shut off both the gas and electrical power supplies to the heater to prevent any hazards.
- Transformer Replacement (if applicable): If you have a UDX, UDZ, or UEZ model, you'll need to replace the existing transformer. First, disconnect and mark the wires on the original transformer. Remove the screws, take out the old transformer, and install the new one provided in the kit. Reconnect the wires, ensuring they match their original positions.
- Relay Assembly Installation: Mount the relay assembly. Position the bracket at the rear of the heater. Drill any necessary holes and secure the assembly using the screws included in the kit. Be careful not to let the thermostat leads touch any metal surfaces.
- Wiring Connections: Consult the wiring diagram included with your relay kit. Carefully connect the relay to the control wiring of your Reznor UBX Unit Heater. Make sure to adhere to the length and distance specifications outlined in Table 3 of the manual to ensure proper operation.
- Install Wiring Diagram Label: Once you've completed the wiring, find the wiring diagram label. Locate the designated spot on the unit, clean the area, and firmly attach the label. It's crucial that this label is visible and easy to access for future reference.
- Restore Power and Test: After completing the installation, turn the gas and electrical power back ON. Follow the lighting instructions provided with your Reznor UBX Unit Heater to start the heater. Check that all heaters are operating correctly to confirm the successful installation of the relay kit. Always refer to your Reznor UBX Unit Heater manual for detailed instructions specific to your model.
