281 Issue 1 - Service Manual - BX3
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Method 1 – Partial fan removal
1. Isolate the heater’s power supply.
2. Remove the electrical leads off the combustion fan.
3. Remove the flue cowl off the flue pipe that is on the external wall of the heater
4. Unscrew the hose clamp that holds the flue pipe onto the combustion fan outlet.
5. Remove the flue pipe and rubber silicone connector.
6. Remove 3 screws which fasten the combustion fan down to the combustion fan box.
7. Pry the combustion fan off the box, which will still be fastened by the sealing heat proof
silicon.
Installation is a reversal of the removal procedure with attention to the following points:
1. Clean both surfaces to be re-mated together.
2. Apply sufficient (but not excessive) silicon to the combustion fan’s mating surface.
