Bradford White UDH Series Service Manual page 16

The Bradford White
GAS CONTROL DISASSEMBLY/REASSEMBLY
Step 1. Rotate knob of the Gas Control to the "OFF" position.
Step 2. Turn off gas supply to water heater.
Step 3. Disconnect gas supply line from Gas Control.
Step 4. Disconnect igniter wire.
Step 5. Disconnect main burner feedline, pilot tube and thermopile wires from gas control.
Step 6. Remove Gas Control cover screw.
Step 7. Depress both tabs on the top of the Gas Control cover and pull to remove.
16
Gas Control cover
screw
16
SERVICE PROCEDURE V
Gas Control
Testing, Disassembly & Replacement
Rotate knob counter-clockwise to
the "OFF" posistion.
CAUTION
Use caution not to bend or damage valve body pins
when removing or installing Gas Control cover.
Valve body pins