User Manual Q&AAnswer
Mar 14, 2025 - 02:43 AM
To install the REZNOR UDAP Stepdown Transformer Kit, follow these steps:
1. Determine where to install the transformer bracket. For models UDAP, UDAS, UDX, and UDZ, the bracket is installed in an unused 3/8-inch suspension hole on top of the heater. If using two-point suspension, locate the hole near the back of the heater. If using four-point suspension, locate the center hole. For models UDBP, UDBS, UBX, and UBZ, the bracket is installed on the hanger bar at the suspension point as part of the suspension process.
2. Position the transformer bracket gasket at the bottom of the bracket, on the side that will be against the heater cabinet. Peel off the backing and adhere the gasket.
3. Secure the bracket using a capscrew, flat washer, and lock washer for models UDAP, UDAS, UDX, and UDZ. For models UDBP, UDBS, UBX, and UBZ, secure the bracket at the suspension point using a field-supplied hanger rod or optional swivel and field-supplied 3/8-inch hex nuts and lock washers.
4. Connect the transformer wiring. Run the black, white, and green wires through 3/8-inch conduit and install an anti-short bushing on each end of the conduit. Install a straight conduit connector on the transformer and run the wires through the connector. Connect the wires to the transformer using wire connectors according to the wiring diagram on the transformer. Connect the straight conduit connector to the conduit.
5. Install the transformer on the transformer bracket and secure it using sheet metal screws. If the transformer has an integral mounting foot, install it as shown in Figure 2, DETAIL A. If the transformer has a slot in the back and a secondary bracket, slide the transformer slot over the top of the secondary bracket and install it as shown in Figure 2, DETAIL B.
6. Connect the supply wiring to the transformer. Install a 90-degree conduit connector at the line voltage inlet on the rear of the heater, facing the fan or blower. Run 3/8-inch conduit from the transformer to the bottom rear of the heater and across to the 90-degree conduit connector. Run the black, white, and green wires through the connector and connect the conduit to the connector. Secure the conduit to the cabinet using a conduit clamp and the provided cabinet xxxx .
7. Remove the heater access panel and connect the supply wiring to the taps inside the transformer according to the wiring diagram on the transformer label.
8. Complete the heater installation according to the installation and venting manuals provided with the unit.
Please refer to the REZNOR UDAP Stepdown Transformer Kit Instruction Manual for more detailed instructions and illustrations.
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