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Replacing the combustion fan
When a fan has been replaced, a new analyze of the flue gas should be done. The RPM
can vary between fans.
Disconnect the power supply to the boiler. Loosen the three wing nuts and lift the cover up.
Disconnect the power supply to the burner. Loosen the power cable to the burner, cable to the
flame sensor and the air supply if its connected. (let the ignition element stay remain in the
ignition device). Note the electrical routing and attachment of all cables.
Disconnect power leads from the fan by pulling out the pins (1). Remove the four screws (screw
3 mm) and remove the fan (2). Install the new fan. Make sure the conduit to the ignition element
cable, is in place.
Replace the ignition device according to the ”change of ignition elements.” Attach the wires
to the igniter and thermal protection and flame sensor with cable ties in the mounting bracket.
