Hi everyone. Remodeling lower room in home had access to heating pipes so updated to rooms to slant fin baseboards from cast iron. Decided to change 20yr working old circulator pump, drain valves, and leaking hi- vent at burner. Put heat on bled every baseboard, drain , etc. Now have heat at all baseboards on both floors except the main floor two Baseboard heaters that are the farthest from the rest. If I bleed either one, the baseboard gets hotter and works perfectly. Then after a very short time, baseboard gets cold again. What am I missing? Thankyou for your time everyone. Gene
No heat only at last two baseboard heaters
- Thread starter hubboy
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Fitter30
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Pressure in the system? Any zone valves? When air bleed is on the two base boards that is creating flow that's why their getting warm. Old pump verses new are they the same?
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WorthFlorida
Clinical Trail 5th session completed 4/24/24.
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Tuttles Revenge
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I'm not an expert in hydronic heating, but I do know that cast iron radiators pumps run for a time while the CI radiators heated, then turn off while the stored energy in the CI dissipated while slant fin radiators only heat while water is circulating because the heat dissipates quickly.. are your new pumps/system set up for the new style radiators?
John Gayewski
In the Trades
If your bleeding and not getting air then it's either the pump is too small, your new piping is wrong, or there's a valve in the off position.
The big question is are you sure the air is out of the system completely? If the air is definitely out I would check that you don't have any broken valves that are stuck closed. Then it's checking the circulator. If it's not big enough then it won't circulate the water far enough.
The big question is are you sure the air is out of the system completely? If the air is definitely out I would check that you don't have any broken valves that are stuck closed. Then it's checking the circulator. If it's not big enough then it won't circulate the water far enough.
WorthFlorida
Clinical Trail 5th session completed 4/24/24.
There is still air in the system. I would run the circulator pump. At the highest rad, open the bleed valve for several minutes, then open the bleed valves that are not working. Continue bleeding for several minutes.
Have you checked the expansion tanks? Old ones are just a metal tank, new ones are a bladder type. Be sure these are drained.
Have you checked the expansion tanks? Old ones are just a metal tank, new ones are a bladder type. Be sure these are drained.
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Ok yep was just air in system isolated burner from heat zone installed hose and bucket on drain moved reg to street pressure and let run for a bit. Closed up all moved reg lever back put heat on and now good. Spent entire bleeding now I know.
WorthFlorida
Clinical Trail 5th session completed 4/24/24.
Thank you for the update. All too often we do not know the outcome or was any suggestion stated helped.
Fitter30
Well-Known Member
Add a Spiro vent to the system it would take care of air in it.
