I have a roof space conversion bedroom. Over the past few weeks the two radiators in the room have been making bubbling noises, now they are warm only at the very base.
Firstly i tried bleeding - no air, no water after 5 minutes.
Then i tried bleeding again, this time with all other radiators in the house turned off. This has helped and the radiators are now just under half full. The situation however does not improve even after 5 minutes with the bleed screw completely out.
I'm not sure what the system is, but i have a cold water tank in the bedroom, a header tank in the bathroom underneath which is the hot water tank. The hot water is provided by a boiler downstairs in the utility room.
A pipe coming out of the hot water tank has a small metal 'box' attached, which i believe to be the central heating pump (?). On the side of this box is a sliding lever (perhaps to increase the speed of the pump?).
I would be grateful for any suggestions, my bedroom is like an ice box!!
2007-02-06 05:50:37 · 3 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
Sounds like don't have enough pressure to overcome the elevation. The head tank on the floor below is worthless for this application and the box is merely a circulating pump which produces no head pressure. Whatever is getting to those third floor radiators is probably from whatever gets water up to the head tank (municipal water pressure or your well pump). Sounds like a homespun design putting those radiators on the third floor.
You will need either a booster pump for the hot water or isolate the radiators and install an electric heater.
2007-02-06 06:01:23 · answer #1 · answered by lunatic 7 · 0⤊ 0⤋
The problem with your pump is cavitation, which means there is air in the system. Air can block a pipe very effectively. If the supply pipe from the header tank to the system is blocked, you can end up sucking air back in via the vent pipe as the system cannot make up the loss quick enough if your boiler has become hot and the system vented a quantity of water back into the header tank. Suggest that you open the guard valves and bleed the system with the heating turned off. Unfortunately you will need to rebalance the system afterwards. I also suggest that you fit automatic vent valves at the high point in the system, so that any trapped air will bleed off as it passes through the system.
2016-05-24 00:04:44 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Header tank reinstalled in roof space or a fully sealed system installed. Like last answer not enough pressure to overcome the elevation.
2015-09-18 06:59:52 · answer #3 · answered by Robert 4 · 0⤊ 0⤋