Bradford-White Corp MI30T*F service manual GAS Control Replacement

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TheBradfordWhite

DEFENDER

Safety System®

SERVICE PROCEDURE RG-VI

Gas Control

Testing, Disassembly & Replacement (Honeywell)

GAS CONTROL REPLACEMENT

Rotate knob counter-clockwise to the “OFF” position.

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.

Resettable Thermal Switch

RemoveWire Connection

Wire Tie

Hex Drive Screws

Right and Left Side Inner Door.

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.

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Contents Service Manual Bradford White Introduction White Rodgers/Robertshaw Gas Valve Troubleshooting Chart Honeywell Gas Control Troubleshooting Chart Honeywell Gas Control Troubleshooting Chart Defender Installation of Inner Door With Gasket Combustion chamber Closed Circuit Thermocouple Testing White Rodgers Control Closed Circuit Thermocouple Testing Robertshaw ControlThermocouple Replacement White Rodgers/Robertshaw Gas Valve Open Circuit Thermopile Testing Honeywell Gas Control PILOT/ELECTRODE Assembly Inspection Cleaning and Replacement Piezo IGNITER, Electrode Testing and Replacement DefenderGas Valve Testing and Replacement White Rodgers/Robertshaw Line PressureMagnet Assembly Testing White Rodgers Control Thermocouple TestingMagnet Assembly Testing Robertshaw Control ECO Energy Cut Off Testing Combination THERMOSTAT/GAS Valve ReplacementWrench Boss Position thermocouple, pilot tube and Piezo wire Honeywell Gas Control Testing, Disassembly, and Replacement Thermopile Testing Temperature Sensor Testing DefenderDetermine Water Temperature Inside Tank Sensor Resistance at Various TemperaturesGAS Control DISASSEMBLY/REASSEMBLY Temperature sensor Wire routing clip Disconnect Use caution not to bend or damage valve body pins Pull in this direction Temperature sensor Insertion stick GAS Control Replacement Defender Combustion chamber Main Burner Inspection, Adjustment Cleaning and Replacement Cast Iron Burner AdjustmentPosition thermocouple/thermopile Pilot tube and Piezo wire Burner Cleaning Resettable Thermal Switch Continuity Testing Resettable Thermal Switch Replacement Over Tighten ScrewsScreenLok Flame Arrestor Cleaning Feedline NutDIP Tube Inspection and Replacement Anode Inspection and Replacement Generic Parts List Parts@bradfordwhite.com Techserv@bradfordwhite.com