Hi,
A few days ago, I turned off the water for my house from the main stopcock to replace a washer in toilet, because it is difficult to access the position to just turn that one cistern off.
But after I finished the washer replacement and turned the main stopcock on, some of the radiators begin to get warm when the heating system is on, even though the TRV on those radiators are turned off. Not all radiators get warm, only some of them, especially the ones in downstairs rooms. A couple of them even get as warm as the radiators that are turned on.
Before I turned off the main stopcock, just one turned off radiator gets a little bit warm. But now, there are quite a few.
I have tried bleeding all the radiators, and it did not help. And the radiators do not seem to have any air inside.
The boiler is a condensing boiler of ZB-7-28 R28 HE system. The pressure shown on the boiler is in the normal range, although after I turned the main stopcock on, I need to top up the water.
The central heating system is circulated by a LOWARA Ecocirc 25-4/130 pump, and the speed is at 3 (1~7). It seems there are some noises from the pump.
The tank is MEGAflo.
Does anyone know what is the problem? Is it related to the water pressure?
Thanks in advance
A few days ago, I turned off the water for my house from the main stopcock to replace a washer in toilet, because it is difficult to access the position to just turn that one cistern off.
But after I finished the washer replacement and turned the main stopcock on, some of the radiators begin to get warm when the heating system is on, even though the TRV on those radiators are turned off. Not all radiators get warm, only some of them, especially the ones in downstairs rooms. A couple of them even get as warm as the radiators that are turned on.
Before I turned off the main stopcock, just one turned off radiator gets a little bit warm. But now, there are quite a few.
I have tried bleeding all the radiators, and it did not help. And the radiators do not seem to have any air inside.
The boiler is a condensing boiler of ZB-7-28 R28 HE system. The pressure shown on the boiler is in the normal range, although after I turned the main stopcock on, I need to top up the water.
The central heating system is circulated by a LOWARA Ecocirc 25-4/130 pump, and the speed is at 3 (1~7). It seems there are some noises from the pump.
The tank is MEGAflo.
Does anyone know what is the problem? Is it related to the water pressure?
Thanks in advance
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