Bradford White U-100T-88R-3N - Manual (Page 19)

SERVICE PROCEDURE VII
Resettable Thermal Switch
Testing and Replacement
Resettable Thermal Switch Replacement
Step 1. Rotate gas control knob to the “OFF” position.
Step 2. Remove outer jacket door.
Step 3. Disconnect red wire leads from resettable thermal switch.
Step 4. Remove (2) ¼” hex drive screws from the manifold
cover and slid to the right to remove from burner
assembly.
Step 6. Remove resettable thermal switch from manifold
cover (Phillips screw driver).
Step 7. Place new resettable thermal switch in place. Be sure contact surface of resettable thermal switch and
manifold cover are free of any debris. Secure resettable thermal switch into place using screws from step 6.
DO NOT OVER TIGHTEN SCREWS.
Step 8. Place manifold cover back in position and secure using the screws from step 4.
Step 9. Reconnect wire leads from gas control and thermopile to resettable thermal switch.
Note: Wire termination are interchangeable with either resettable thermal switch connection.
Step 10. Replace outer jacket door.
Step 11. To resume operation follow the instructions located on the lighting instruction label or the lighting instruction
located in the installation and operation manual.
Manifold Cover
¼” Hex Drive Manifold
Cover Screws
Phillips Screws
Red Wire Leads
Gas Control shown in the “OFF” position
Page 19
ECO-MAGNUM
75/100-Gallon Atmospheric
19