Hi,

I need to repressurise a sealed system after a leak (leak is fixed)
and I would like to know if this has to be done when the system is
cold since SWMBO does not want the CH switched off at all today! It's
down to 0.8 bar ATM.

TIA, Mark
--
(\__/) M.
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(")_(") their inaction to the problem. I am blocking most articles
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Mark wrote:
Hi,

I need to repressurise a sealed system after a leak (leak is fixed)
and I would like to know if this has to be done when the system is
cold since SWMBO does not want the CH switched off at all today! It's
down to 0.8 bar ATM.

It ought to be done cold. However you can usually get away with topping
it up a little when hot if you take it slowly. Working out what to
pressurise it to is harder though since you probably don't know the
normal "hot" operating pressure is, or for that matter how hot the
system actually is at the time you add water. If the system is good and
hot, I would be tempted to take it to about 1.5 bar.

--
Cheers,

John.

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Mark wrote:
Hi,

I need to repressurise a sealed system after a leak (leak is fixed)
and I would like to know if this has to be done when the system is
cold since SWMBO does not want the CH switched off at all today! It's
down to 0.8 bar ATM.

TIA, Mark
TBH its not critical. I generally go to about 1.5 bar cold. Probably too
much, but it seems to take it.

On Wed, 29 Oct 2008 10:00:00 +0000, The Natural Philosopher
wrote:

Mark wrote:
Hi,

I need to repressurise a sealed system after a leak (leak is fixed)
and I would like to know if this has to be done when the system is
cold since SWMBO does not want the CH switched off at all today! It's
down to 0.8 bar ATM.

TIA, Mark
TBH its not critical. I generally go to about 1.5 bar cold. Probably too
much, but it seems to take it.

Thanks for the replies. I'll let it cool a little to avoid burning
myself and then do it slowly. IIRC the pressure does not change a lot
when hot vs cold.

--
(\__/) M.
(='.'=) Owing to the amount of spam posted via googlegroups and
(")_(") their inaction to the problem. I am blocking most articles
posted from there. If you wish your postings to be seen by
everyone you will need use a different method of posting.
See http://improve-usenet.org