hello all. i have a single zone hot water heating system with an
external coil. the circulator is continuously run for domestic hot
water. the problem started with gurgling sounds from the baseboard
radiators. it sounded as if air may have gotten into the system. i had
a "heating prof" in and he filled sysem and bled it from a valve
located near the boiler. i live on the first floor and the heating
pipes run from boiler, overhead, and then down to baseboard radiators.
when he first filled and bled the system i heard almost nothing from
the radiators or the boiler. the next day i heard some bubbling noise
from the radiators when the burner came on, and the noise became
progressively worse each day. i bled the system again. initially the
radiators were much quieter, but again began to gurgle louder. upon
closer inspection i determined the gurgling/bubbling sound is coming
from the expansion tank each time the burner comes on, and the noise i
hear from the radiators is actually coming from through the pipes from
the expansion tank/ boiler room. the burner comes on at 170/180 and
goes off at 200 degrees. could the expansion tank be faulty and
somehow letting air into sysem? could the system actually be running
hotter than gauge reads and aquastat is set for? or could the hot
water be surging as soon as the burner comes on? i believe the
expansion tank is one of the newer ones with a bladder. thanks for any
help.email me at just remove the 5 for spam
purposes. or post message with any help. thanks again.

In article , hackus wrote:
hello all. i have a single zone hot water heating system with an
external coil. the circulator is continuously run for domestic hot
water. the problem started with gurgling sounds from the baseboard
radiators. it sounded as if air may have gotten into the system.

Yep.

[paraphrasing remainder: Bled system, noise went away, noise came back, bled
system, noise went away, noise came back, repeat...]

You have a leak somewhere -- possibly in that expansion tank. If it's a
bladder-type tank, there may be a hole in the bladder. Air can also enter the
system through leaks in the bleeder valves at the baseboard radiators, so
check those to make sure that they're closed tightly and not leaking.

--
Doug Miller (alphageek at milmac dot com)

How come we choose from just two people to run for president and 50 for Miss America?

is ther a way to check if the expansion tank is still good. thanks
for the help. jim

On Sun, 18 Jan 2004 14:34:06 GMT, (Doug Miller)
wrote:

In article , hackus wrote:
hello all. i have a single zone hot water heating system with an
external coil. the circulator is continuously run for domestic hot
water. the problem started with gurgling sounds from the baseboard
radiators. it sounded as if air may have gotten into the system.

Yep.

[paraphrasing remainder: Bled system, noise went away, noise came back, bled
system, noise went away, noise came back, repeat...]

You have a leak somewhere -- possibly in that expansion tank. If it's a
bladder-type tank, there may be a hole in the bladder. Air can also enter the
system through leaks in the bleeder valves at the baseboard radiators, so
check those to make sure that they're closed tightly and not leaking.

In article , hackus wrote:
is ther a way to check if the expansion tank is still good. thanks
for the help. jim

Not sure... try this. Bleed the air out of the radiators until the noise goes
away. Use a tire gauge to check the air pressure in the expansion tank, and
also check the pressure on the gauge at the boiler. When the noise returns,
check the pressures again. If the pressure at the boiler is the same, and the
pressure in the tank is lower, I'd suspect a leak in the tank.


On Sun, 18 Jan 2004 14:34:06 GMT, (Doug Miller)
wrote:

In article , hackus
wrote:
hello all. i have a single zone hot water heating system with an
external coil. the circulator is continuously run for domestic hot
water. the problem started with gurgling sounds from the baseboard
radiators. it sounded as if air may have gotten into the system.

Yep.

[paraphrasing remainder: Bled system, noise went away, noise came back, bled
system, noise went away, noise came back, repeat...]

You have a leak somewhere -- possibly in that expansion tank. If it's a
bladder-type tank, there may be a hole in the bladder. Air can also enter the
system through leaks in the bleeder valves at the baseboard radiators, so
check those to make sure that they're closed tightly and not leaking.


--
Doug Miller (alphageek at milmac dot com)

How come we choose from just two people to run for president and 50 for Miss America?