Bradford White MI30T Service Manual page 28

The Bradford White
DEFENDER
Safety System
GAS CONTROL REPLACEMENT
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. Turn off water supply and drain water heater completely.
Step 5. Remove outer jacket burner access door.
Step 6. Right side inner door removal.
a) Disconnect red wire leads from resettable thermal switch.
b) Remove (2) hex drive screws from RIGHT side inner door.
c) Remove (2) hex drive screws from FLANGE SECTION of inner door.
d) Remove right side inner door and set aside. Be careful not to damage gasket material on inner door.
Remove
Wire Tie
Hex Drive Screws at
Flange Area of Inner Door
Step 7. Removal of Gas Control.
a) Disconnect main burner feedline, pilot tube, piezo igniter wire, inner door wire (red) and thermopile wire
(white) from Gas Control.
b) 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 gas inlet of Gas Control.
Step 8. Install new Gas Control into water heater.
a) 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 gas inlet of Gas Control.
28 28
Testing, Disassembly & Replacement (Honeywell)
®
28
SERVICE PROCEDURE RG-VI
Gas Control
Rotate knob counter-clockwise
to the "OFF" position.
Resettable Thermal Switch
Wire Connection
Hex Drive Screws
Right and Left Side Inner Door.