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Posted by mark on March 08, 2005 at 20:19:45:
In Reply to: boiler vacumm posted by mikey on March 04, 2005 at 10:03:09:
: Our two lp boilers at night will sometimes fill to the top in the site glass as well as the condensate tank to which it gets its water from. Two boiler feed solenoids, check valves in feed pumps. Q? Can the boilers cool at nite, creating a vacumm and drawing water out of tank??...mikey
The solenoids should stop the water from being drawn into the boiler providing they seal when closed and in fact if they are normally closed valves. alot depends on location of condensate tank, is it located higher than the boiler? where does your makeup enter the system at? numerous items to look at before reaching an explanation. remember; water in steam out, so when boiler shuts down that steam returns as condensate to the tank the tank.
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