MAIN BURNER AND ORIFICE REMOVAL
1. Remove burner tray.
2. Remove screws and burner hold-down bracket.
NOTE:
If the heat exchanger is sooted badly, the
burner hold-down bracket and spacer can become dis-
torted from direct-flame impingement and this usually
necessitates replacement of these parts.
3. Lift burners from slotted spacers and slide from ori-
fices. Clean with a wire brush.
4. Orifices usually do not need to be replaced. To
clean, run either copper wire or wood toothpick
through orifice.
Do not enlarge hole.
To remove
orifice, use a socket wrench and remove from
manifold.
DO NOT
overtighten when reinstalling.
PILOT
BURNER
BURNER
HOLD-DOWN
BRACKET
GAS
ORIFICE
GAS VALVE
BURNER TRAY REMOVAL
1. Shut off main electrical power switch to heater.
2. Shut off gas upstream of heater.
3. Remove front door.
4. Disconnect gas line from gas valve.
5. Remove (2) screws that mount burner tray to unit,
and (2) screws that secure gas valve to jacket.
6. Disconnect wires that terminate at gas valve.
7. Disconnect hi-tension wire from PC board.
8. Slide out burner tray.
9. Reverse above procedure to reinstall.
GAS VALVE REMOVAL
1. Shut off gas supply to the heater. Remove gas
piping to gas valve inlet.
2. Disconnect wires, pilot tubing and bleed line, if
required.
3. Remove burner tray from heater.
4. Turn vertical gas pipe from manifold slightly and
unscrew gas valve.
5. Reverse above procedure to reinstall.
PILOT SAFETY
The heater employs a pilot safety which closes the
main gas valve within 8/10ths of a second whenever
the pilot flame is interrupted. The pilot flame is auto-
matically lit when the device is powered. The heater
performs its own safety check and opens the main
valve only after the pilot is proven to be lit.
PILOT REMOVAL AND CLEANING
1. Disconnect pilot tubing and wires from gas valve.
2. Remove pilot assembly from burner tray.
3. Remove pilot from bracket.
4. Remove pilot orifice and air opening, and clean
with wire or small brush.
CAUTION!
Do
not
enlarge hole in pilot orifice.
5. Reverse above procedure to reinstall.
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