basement no heating in cold days

peng.shen

Recently I have a 50 years old oil burner hot water furnace system updated. People tell me this old furnace is half gravity, half circulator system with two branches serving for 7 appartment. Each appt. have 7 old cast iron radiators.
Now I ask a contractor to put a new furnace, the two return branchs are still join together then feed the water to the same old circulator then to the furnace and go to two output branches.
After the new furnace is installed the 6 apptments on 1st, second and third floor all have heating. The basement floor just the room near the furnace get heating. Other apptments in the basement will have heating only in warmer days when upstairs close the radiators.
The furnace and basment radiators are on same level and the hot water in and out big pipes overhead those basement radiators are always warm. Any idea. Why the water in basement radiators are lazy and not want to move.

peng.shen

The pressure

Also the pressure are 25 now, and the pressure before is 20. The water temprature is 140F. The 150F and 160F are also tested but it did not work.

Steamhead

May be an air problem

something is keeping the water from moving thru that basement zone. More than likely it's air in the pipes, or maybe someone forgot to open a valve during the boiler replacement.

If your contractor can't fix this, try someone from the Find a Contractor page of this site.

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peng.shen

Try again tomorow

My contractor is an oil company. They will send technicien to try again. May be I will sugest them to read this site. Here in montreal canada seems not many contractor contribute to this site. I will report the results and put more information to this problems. Hope they can solve it soon.

peng.shen

problem solved

The Technicien at last found the problem. It is a defect circulator blade. He show me the old blade too small and put an 2 inch blade. Now every thig is OK. Thank you for this site. It help me Know more and cooperate with technicien more easy. The technicien also tell me how the controler work. It is a techman 260 boiler controler. But he is too busy to spend time to let me understand. A lot of service calls. It is winter, more people need his attention.