Draining down a Central Heating System


Postby PatK » Mon Jan 21, 2008 3:35 pm

I am due to drain down my central heating system (single piped system) soon and am not sure if I need to turn off the gas and electricity to the boiler.

I have read that you can just turn the thermostate control down to zero and switch off the timer. Other things I read say that the boiler needs to be switched off completely so I'm a bit confused.

Ideally I would prefer NOT to have to turn the boiler off (as I can't locate the electricity on/off switch!!). Will I damage it if I leave it on?

Many thanks in advance.
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Postby htg engineer » Mon Jan 21, 2008 6:34 pm

There's no need to turn the gas off to the boiler.

As long as you can guarantee the boiler wont be turned on when it's empty then it wont be a problem.

Turning off at the timer and the boiler stat is adequate. Just make sure everyone in the house knows it's off, and they wont attempt to turn the boiler on.
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