Bradford-White Corp MI30T*F

SERVICE PROCEDURE RG-IX

ScreenLok®Flame Arrestor Cleaning

Step 1. Rotate knob of combination thermostat gas valve to the off position.

Step 2. Remove outer jacket door.

Step 3. Remove inner do or per SERVICE PROCEDURE R G-I, step 3a through 3e.

Step 4. Disconnect main burner feed line, pilot tube and thermocouple/thermopile

from combination thermostat gas v alve and remove burner assembly

from combustion chambe r.

NOTE: Feedline nut for natural gas control uses right hand threads,

LP control uses left hand thread.

Step 5. Clean ScreenLok®Flame Arrestor using stiffbrush, compressed air and/or shop vacuum to remove any scale or

other debris accumulation. Using a soft brush, clear jacket openings of any dirt, dust, restrictions or other obstructions.

Step 6. Remove any debris from burner assembly per SERVICE PROCEDURE RG-V and reinstall burner assembly

into combustion chamber .

Step 7. Reconnect feedline, thermocouple and pilot tube to the combination thermostat/gas valve.

Step 8 Reinstall inner door per SERVICE PROCEDURE RG-I, steps 4 through 13.

Step 9. To resume op eration follow the instr uctions located on the lighting instruction label or the lighting i nstruction

located inthe installation and operation manual.

The Bradford White

DEFENDER

Safety System®

ScreenLok®Flame Arrestor Cleaning

ForWhite Rodgers Control,

depress knobslightly androtate

clockwise to the “OFF” position.

For Robertshaw Control, rotate

knob clockwise to the“OFF”

position.

Feedline

Nut

For Honeywell Control, rotate

knob counter-clockwise to t he

“OFF” position.