Maintenance - DeDietrich MCR 24 Technical Instructions

2 Maintenance

Cut the power supply to the boiler.
Cut the gas supply to the boiler.
2.1 Open
Unscrew the 2 screws.
Remove the front panel. Disconnect the 2 ignition electrodes from
the connector/ignition on the gas valve (
2.2 Checking the ignition electrode / ionisaton sensor
- Dismantle the electrode pin and the earth cable.
- Unscrew the 2 screws. Remove the unit.
- Clean or replace the ignition electrodes.
08/06/06 - 300008460-001-B
).
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI
2.3 Remove the front plate from the combustion chamber
Disconnect the ignition electrode from the transformer.
Disconnect the electrical connection from the gas valve unit.
Remove the gas block connection nut.
Disconnect the electrical connection to the fan.
Remove the nuts from the inspection hatch on the front of the heat
exchanger.
Then remove the inspection hatch, the fan and the gas valve unit.
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