Burner Cleaning - Bradford White M1TW40S Series Service Manual

Burner Cleaning

Burner Cleaning
Step 1. Position gas control power switch to the
Step 1. Position gas control power switch to the
"OFF" position and unplug heater from wall
"OFF" position and unplug heater from wall
outlet.
outlet.
Step 2. Turn off gas supply to water heater.
Step 2. Turn off gas supply to water heater.
Step 3. Remove outer jacket door and slide inner door open from left to
Step 3. Remove outer jacket door and inner door per service
right.
procedure XIII on Page 34.
Step 4. Disconnect pilot tube (7/16 wrench) and
Step 4. Disconnect pilot tube (7/16 wrench) and
feedline (¾ wrench) from gas control.
feedline (¾ wrench) from gas control.
Step 5. Disconnect igniter/flame sensor wire from gas control.
Step 5. Disconnect igniter/flame sensor wire from gas control.
Step 6. Remove burner assembly from combustion chamber.
Step 6. Remove burner assembly from combustion chamber.
Step 7. Thoroughly inspect burner surface area and burner port area and
Step 7. Thoroughly inspect burner surface area and burner port area and
remove any loose debris.
remove any loose debris.
Step 8. For cast iron burners, inspect for any debris build up inside
burner casting.
Step 9. Unscrew burner from main burner
orifice. On cast iron burners, loosen
air shutter nut and unscrew feedline
from burner.
Step 10. Remove main burner orifice from
feedline (½" wrench on steel
burners, 3/8" wrench on cast iron)
inspect orifice, clean or replace if
necessary.
Step 11. Reassemble burner and reinstall into water heater. Restore gas supply
and check for gas leaks.
Step 12 To resume operation follow the instruction located on the lighting
instruction label or the lighting instruction located in the installation
and operating manual.
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16
TTW SERVICE PROCEDURE I
Burner Operation Inspection,
Adjustment, Cleaning and Replacement
Remove Outer
door.
Igniter/flame
sense wire
Burner
surface area
Burner
port area
Main burner
Slide inner door open
from left to right.
Feedline nut
Pilot tubing nut
orifice
L.P. Main burner
orifice. Left hand
thread
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