PDX Series
PDX SERVICE PROCEDURE I
Burner Operation Inspection,
Adjustment, Cleaning and Replacement
Burner Cleaning
Step 1. Position gas control power switch to the “OFF” position and unplug heater from wall outlet.
Step 2. Turn off gas supply to water heater.
Step 3. Remove outer jacket door and inner door per service procedure XIII on page 35.
Step 4. Disconnect pilot tube (7/16 wrench) and feedline (¾ wrench) from gas control.
Igniter/flame
sense wire
Step 5. Disconnect igniter/flame sensor wire from gas control.
Step 6. Remove burner assembly from combustion chamber.
Step 7. Thoroughly inspect burner surface area and burner port area and remove any loose debris.
Step 8. For cast iron burners, inspect for any debris build up inside burner casting.
Burner
surface area
Burner
port area
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.
Main burner
orifice
Feedline nut
Pilot tubing nut
L.P. Main burner orifice. Left hand
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.
thread
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