Bradford White U-100T-88R-3N - Manual (Page 11)

Thermopile Replacement
Step 1. Turn off gas supply to water heater. Rotate gas control knob to the “OFF” position.
Step 2. Remove outer jacket door.
Step 3. Remove right side inner door and burner door per SERVICE PROCEDURE I, steps 3 and 4.
Step 4 Follow the thermopile leads to the pilot bracket. Disconnect the thermopile from the pilot bracket (7/16"
wrench).
Step 5. Install new thermopile into pilot bracket and tighten the nut to the pilot bracket (7/16" wrench). Position
thermopile wire against left side inner door flange at its original position. Connect the red thermopile wire to
the red lead from the wire harness. Connect the white thermopile wire to the resettable thermal switch.
Step 6. Install burner and inner door per SERVICE PROCEDURE I, steps 5 through 16.
Step 7. To resume operation follow the instructions located on the lighting instruction label or the lighting
instructions located in the installation and operation manual.
SERVICE PROCEDURE II
Thermopile Testing and Replacement
Page 11
Thermopile Position
ECO-MAGNUM
75/100-Gallon Atmospheric
7/16" Thermopile
Nut
Gas Control shown in the “OFF” position
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