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8.5 Shutting down the boiler
CAREFUL
► Only drain the boiler and the system if
the mains voltage has been interrupted
and there is a chance of freezing.
► Switch the power o to the boiler.
► Remove the 3 amp fuse from the wall spur.
► Turn o the gas isolation valve under the boiler.
► Drain the boiler completely.
► Drain the heating system at the lowest point.
► Turn o the mains cold water supply isolation valve under
the boiler.
► Drain the boiler by disconnecting the domestic hot water
connections under the boiler and the pipework at the
lowest point.
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