281 Issue 1 - Service Manual - BX3
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7.9 Heat Exchanger Removal
1. Remove from the top.
2. Isolate the heater’s power supply.
3. Remove the main wiring looms in the heater combustion chamber.
4. Unscrew the hose clamp off the combustion fan flue pipe. Remove the flue cowl off the
front of the unit and slide the flue pipe out of the unit.
5. Remove the burner manifold.
6. Remove the pressure switch hose.
7. Remove the burner assembly.
8. Remove the 8 screws that hold the heat exchanger to the frame of the unit.
9. Remove the 2 screws that hold the side panel flue end on the external part of the unit and
pull away from the unit. This will expose the entire gas feed pipe.
10. Unscrew the gas feed tube off the gas cock and then remove away from the unit.
11. Then raise the heat exchanger making sure the heat exchanger has been fully removed.
