Bradford-White Corp MI30T*F service manual Defender

Page 7
SERVICE PROCEDURE RG-I
Inner Door/Gasket Removal, Inspection
Replacement and Reinstallation
For Honeywell Control, rotate knob counter-clockwise to the “OFF” position.

White

DEFENDER

Safety System®

Inner Door Removal Procedure

Step 1.

Rotate knob of the combination

 

 

 

thermostat/gas valve to the “OFF” position.

 

 

Step 2.

Remove outer jacket burner access door

For Robertshaw Control,

For White Rodgers Control,

 

 

Step 3.

Inner Door Removal.

depress knob slightly and rotate

rotate knob clockwise to

clockwise to the “OFF” position.

 

 

the “OFF” position.

 

 

 

a)Disconnect resettable thermal switch wire leads (leading from Gas Control/gas valve).

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 (2) hex drive screws from left side inner door.

e)Remove inner door and inspect per step 4.

Resettable Thermal Switch

Wire Connection

Hex Drive Screws

Right and Left Side Inner Door.

Hex Drive Screws at

Flange Area of Inner Door

Step 4. Fully inspect inner door gaskets for the following:

>Tears

>Other imperfections that will inhibit proper seal

>Missing Material

>Gasket adhesion to inner door

>Cracks

>Material left on combustion chamber (around opening)

>Dirt or debris

 

If the gasket is not effected by any of the above, gasket replacement is not required. If replacement is required, proceed to Inner Door Gasket Replacement Procedure.

Inner Door Gasket Replacement Procedure.

WARNING

If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

Step 5. After inspection of inner door as noted in step 4, completely remove gasket and adhesive residue from right and left side inner doors as needed.

Step 6. Use RTV sealant (recommended bead size 1/8") to secure the inner door gasket to the inner door sections (right & left). Refer to illustration on next page for proper application. Note the overlap configuration in the flange area of the inner door. Set the flange section first, this will help to achieve the proper over lap position.

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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 Robertshaw Control Closed Circuit Thermocouple Testing White Rodgers ControlThermocouple Replacement White Rodgers/Robertshaw Gas Valve Open Circuit Thermopile Testing Honeywell Gas Control PILOT/ELECTRODE Assembly Inspection Cleaning and Replacement Defender Piezo IGNITER, Electrode Testing and ReplacementLine Pressure Gas Valve Testing and Replacement White Rodgers/RobertshawMagnet Assembly Testing White Rodgers Control Thermocouple TestingMagnet Assembly Testing Robertshaw Control Combination THERMOSTAT/GAS Valve Replacement ECO Energy Cut Off TestingWrench Boss Position thermocouple, pilot tube and Piezo wire Honeywell Gas Control Testing, Disassembly, and Replacement Thermopile Testing Defender Temperature Sensor TestingSensor Resistance at Various Temperatures Determine Water Temperature Inside TankGAS 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 Cast Iron Burner Adjustment Main Burner Inspection, Adjustment Cleaning and ReplacementPosition thermocouple/thermopile Pilot tube and Piezo wire Burner Cleaning Resettable Thermal Switch Continuity Testing Over Tighten Screws Resettable Thermal Switch ReplacementFeedline Nut ScreenLok Flame Arrestor CleaningDIP Tube Inspection and Replacement Anode Inspection and Replacement Generic Parts List Parts@bradfordwhite.com Techserv@bradfordwhite.com