Bradford-White Corp MI30T*F

SERVICE PROCEDURE RG-VI

Gas Control

Testing, Disassembly & Replacement (Honeywell)

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 fromGas Control.

Step 4. Turn off water supply and drain waterheater completely.

Step 5. Removeouter jacket burner access door.

Step 6. Right sideinner door removal.

a) Disconnect red wire leads from resett able thermal switch.

b) Remove (2) hex drive sc rews from RIGHT side inn er door.

c) Remove (2) hex drive screws from FLANGE SECTION of inner do or.

d) Remove right side inner door and set aside. Be careful not to damage gasket materialon inner door.

Rotate knobcounter-clockwise

to the “OFF”p osition.

Resettable Thermal Switch

Wire Connection

Hex Drive Screws

Right and Left Side Inner Door.

Hex Drive Screws at

Flange Areaof InnerDoor

Remove

Wire Tie

Step 7. Removal of Gas Control.

a) Disconnectmain burner feedline, pilot tube, piezo igniter wire, inner door wire (red) and thermopile wire

(white) from Gas Control.

b) Remove Gas Control from wate r heater by rotating counter c lockwise. DO NOT use a wrenc h 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 ofGas 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 mayoccur. If necessary, use a length of ½" NPT pipe threaded

into gas inlet of Gas Control.