Bradford White ECO-DEFENDER EURG2DV40S N Series Service Manual page 15

UDV Series
Gas Control Removal from Water Heater
Step 1. Position the gas control knob in the "OFF" position.
Step 2. Drain the heater to a point below the gas control level.
Step 3. Turn off the gas supply to the water heater and disconnect
gas piping from the gas control.
Step 4. Disconnect the igniter wire and the red and white pilot wires
from the gas control.
Step 5. Remove the outer jacket burner access door.
Step 6. Disconnect the pilot tube (7/16" wrench) from the gas
control.
Step 7. Disconnect the main feedline (3/4" wrench) from gas control.
Step 8. Remove gas control from water heater by rotating counter
clockwise. DO NOT use a wrench on the gas control body,
damage to the Gas Control may occur. If necessary, use a
length of ½" NPT pipe threaded into the gas inlet of gas
control.
Step 9. Install new gas control into water heater by rotating
clockwise. DO NOT use a wrench on the gas control body,
damage to the Gas Control may occur. If necessary, use a
length of ½" NPT pipe threaded into the gas inlet of the gas
control.
Step 10.Reattach the main burner feedline, pilot tube and pilot
wires. Reattach igniter wire.
Step 11.Reconnect gas supply and check for leaks.
Step 12.To resume operation, follow the instructions located on the
lighting instruction label or the lighting instructions located
in the installation and operation manual.
UDV SERVICE PROCEDURE III
Gas Control Testing and Replacement
15
15