No heat problem

Dennis5

I have a 1 pipe closed system in my basement. Last yr it worked really well with 7-8 lbs pressure. It heated to the end of the line quickly with no problems.

This summer I opened the drain valve on the water tank/boiler to release any calcium build up. A big mistake.
Finally cleaned the "water pressure reducing valve" which is now working well,
I can adust the system pressuse to whatever is needed.

The boiler, thermostat, pump all seem to be working fine, the air tank pressure is at 9lbs, bleeding of the system is done.

Problem is very little heat; I do get heat anywhere from 1 meter to 4 meters depending on how high I increase the system pressure. I have tried it adjusting the system to 7-8lbs, 10 lbs, 12lbs, 14lbs, 20lbs, and 24lbs.

Any idea what could be the problem? Everything seems to be working fine.

Ted_9

Sounds like air in the system. Try purging the system.

Is it baseboard heat?

Try power purging.

If you dont know how, just hire a pro.

PATRIOT HEATING & COOLING, INC.

Boston Boiler

also match your 9 lb. expansion tank to the same as you have coming from the street. (pressure reducing valve)

BB

Dennis5

Ted, it's baseboard heat, is power purging the same as bleeding air out?

Boston Boiler, I don't understand, don't know what the street pressure is, maybe 50lbs,I think 12lbs is standard for hydronic systems and that is only if pressure is needed to reach a 2nd story building. Remember last yr I was using 7-8lbs with no problems.

Ted_9

Power purging is a specific way to force the air out of the system, not bleeding from the radiators. I will not give instructions on this since At this point I think you should hire a pro.

As far as pressures, new expansion tanks and water feeders usually come pre set to 12 psi. But you should have this checked by a pro. Sorry Im repeating myself but just because you know how to adjust the water pressure, doesnt qualify you to do the work. No offence intended.

PATRIOT HEATING & COOLING, INC.

Boston Boiler

Sorry, should have said "street pressure coming through
the pressure reducing valve". The expansion tank and pressure from the reducing valve should match each other. You said you only have 9 lbs. of pressure in the tank and had been adjusting street pressure 7-8, 10, 12, 14 20,& 24 lbs. through the the reducing valve. You never mentioned that you were also changing the tank to match your new settings. You probably are air bound as Ted said I was just adding to also correct the pressure on your tank to match the pressure in your system.

BB

Dennis5

Thanks guys for all your help, I will look for a pro in my area to purge the system.