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Caution
Label all wires prior to disconnection. Wiring
errors can cause improper and dangerous
operation.
7. Tag and remove all wires from the gas valve
terminals.
8. Unscrew the screws that fastens the burner
manifold flange to the gas valve. Replace the
gas valve and flange "O" rings and re-
assemble in reverse order.
9. Before operating the heater, test the complete
gas supply system, including all fittings, for
leaks by using a soap solution.
10. Follow the lighting instructions on the
lighting and shutdown label.
4D. Removal of Gas Burners
1. Turn off the main gas supply at the manual
gas cock or the meter.
2. Unscrew the screws that fastens the gas inlet
flange to the gas valve (see Fig. 25).
Figure 25. Gas valve removal.
Caution
Label all wires prior to disconnection. Wiring
errors can cause improper and dangerous
operation.
3. Tag and remove all wires from the gas valve
terminals.
4. Remove the two screws that fasten the anti-
rotation bracket to the inner panel, and the
three screws attaching the manifold bracket.
5. Slide the burner tray out of the heater
(see Fig. 26).
NOTE:
Due to the sharp edges on the metal
burner, wear protective gloves for the next steps.
6. Grasp the burner firmly, and push it away
from the manifold until it is clear of the
orifice. Slide it out of the burner tray (see
Fig. 27).
7. To replace the burner, insert the rear into the
slot at the rear of the burner tray, line it up
with the proper orifice and snap it into
position.
8. Reinstall the burner tray by sliding it back
into the heater and fasten it with the two
brackets.
9. Reconnect the gas piping, turn on the gas
supply, and check the system for leaks using
a soap solution.
10. Reconnect the electrical wires to the gas
valve according to the wiring diagram found
on the inside of the heater.
If the burner being removed is the one with the
pilot attached, follow these additional procedures after
step 6, above.
1. Disconnect the pilot gas tube from the gas
valve.
2. Detach the pilot burner assembly from the
burner bracket and remove the burner
according to the instructions in step 6.
3. Install the pilot burner assembly on the new
burner.
