10.3.1 General
Danger
Disconnect the boiler's electricity supply.
Shut off the gas supply.
Caution
During inspection or maintenance work, always replace all
gaskets of the disassembled parts.
10.3.2 Clean the fan and venturi
1. Remove the electrical connections from the fan. Push the safety slides
on both sides of the power plug right to the back (using a small
screwdriver, for example).
2. Unscrew the bolts from the extension piece under the fan.
Support the gas valve unit, using a block of wood, for example.
3. Disconnect the air supply hose from the venturi.
4. Unscrew the nuts on the fan output.
5. Disconnect the fan from the adaptor.
6. Clean the fan with a soft plastic brush.
7. Clean the venturi with a soft plastic brush.
8. Reassemble the unit in reverse order.
Important
Reconnect the fan's electrical connection.
Fig.74 Clean the fan and venturi
10 Maintenance
66 7600532 - v.11 - 13122018
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