I have a two stage Hydrotherm boiler with an everhot indirect water
tank for a 3 story building. I had the boiler cleaned and then
replaced the drain valve on the steel overhead expansion tank, as well
as replacing the water feeder.
I have repeatedly drained the expansion tank down to a trickle of
black water. In about a months time the boiler pressure goes from 15
psi to about 22 psi, at which point I'm afraid to let it continue so I
drain the expansion tank again. A plumber came by and told me if the
coil in the everhot tank even had a pin hole leak, the boiler pressure
would go from 15 to 30 psi in an hour, not a month.
Any suggestions, ideas what it could be?
On Apr 5, 11:26 am, .p.jm.@see_my_sig_for_address.com wrote:
You said to do the following:
"Drain the boiler, leave the fill to the potable open, and see
if your boiler fills up. Remember, water will only move from high
presure to lower presure. Your potable is always ~ 60 PSI. "
So, in your example above would I leave the feeder to the boiler open
and the potable to the coil open? If so, I believe the boiler will
fill to 15 psi and then repeat the pattern I described above,
gradually increasing boiler pressure over time.
On Apr 5, 12:29 pm, .p.jm.@see_my_sig_for_address.com wrote:
So if I do as you say, drain the boiler to 0 psi, shut the feeder to
it and leave the potable open to the indirect tank. How quickly would
you expect to see my boiler start filling assuming the coil has a hole
How big is the hole ? You tell me.
Give it 12 hours, 24 if weather permits.
And do not judge by boiler pressure now, look for the actual
water level. Drain it DOWN, not 'to 0 psi', Then watch for 'rising
water', not 'rising pressure'.
Click here every day to feed an animal that needs you today !!!
On Apr 5, 1:56 pm, .p.jm.@see_my_sig_for_address.com wrote:
So you're saying, turn off the boiler, drain it completely (boiler
pressure will show zero psi), shut the valve to the feeder, leave the
potable to the indirect open, and with the boiler off and cold see if
the cold water rises in the boiler.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.