Warning
Wear gloves and a suitable protective mask to avoid ingesting particles from the
refractory.
4. Disconnect the ignitor and gas valve wires, and the two electrical fan plugs.
5.
To access the fan / Venturi mixing device assembly, unscrew the gas valve coupler nut .
Retain the gasket.
6. Remove the nuts of the heat exchanger lid.
7. Carefully remove - lift off and rotate - the fan-heat exchanger lid assembly. The burner is
attached to the underside of the heat exchanger lid.
8. Remove the heat exchanger lid gasket. Replace if damaged.
9. To remove the ignitor and gasket, remove the two screws, and carefully lift the ignitor
straight up.
10. Place the fan-heat exchanger lid-burner assembly upside down on a clean dry surface.
11. Carefully remove the refractory. Inspect for damage and replace if necessary.
12. Remove the burner screws and then the burner.
To install the new burner:
1. Inspect the burner gasket, and replace if damaged.
2. Install the new burner, tightening the screws evenly in a criss-cross pattern.
3. Reinstall the refractory, lining up the holes with the holes on the heat exchanger lid.
4. Turn over the fan-heat exchanger lid-burner assembly, and reinstall the ignitor gasket and
ignitor (tightening its screws by hand plus an extra 1/8 of a turn).
5. Reinstall the heat exchanger lid gasket.
6. Reinstall the fan-heat exchanger lid-burner assembly, tightening the nuts as shown below.
7. Reassemble components in the reverse order.
8. Open up the gas supply valve, and check for leaks.
9. Tune the gas valve.
Figure 43 Order for tightening screws - SL 26-260 G3
Section: Service and maintenance
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