C
Creeky
Hi all,
i have a query about a central heating setup at work:
we have a boiler supplying 10 double radiators and a large water heater. Recently the boiler was replaced for a Worcester Bosch condensing floor stander. Since then we have been having a lot of problems with excessive air in the system, to a point where the air blocks flow and shuts down the boiler.
The system was put in a good few years ago, the old boiler was a conventional floor standing unit (with no problems with air.
I have drained the system several times yesterday to try and clean up as there seems to be a lot of rust in the system. All radiators now work but we still have excessive air. I have now added restorer.
i am unsure the setup is correct as I read some where that condensing boilers are fussy about pump location (but I can't remember where). Or is it the rust (ferric oxide) giving of the gas?
the system is sealed, there is a condensing boiler on The floor, a meter up on the flow is the pump. same level on the return is a magnaclean, then the expansion vessel. The pipe work then rises for another 2 meters before running round the walls for 10 meters. It the tees off with two zone valves, one for CH and one for the water heater. The radiators are 5 metres away in another room.
I have never had a sealed CH system, are the notorious for troublesome bleeding?
Sorry for the long post, I can't post photos.
thanks in advance.
i have a query about a central heating setup at work:
we have a boiler supplying 10 double radiators and a large water heater. Recently the boiler was replaced for a Worcester Bosch condensing floor stander. Since then we have been having a lot of problems with excessive air in the system, to a point where the air blocks flow and shuts down the boiler.
The system was put in a good few years ago, the old boiler was a conventional floor standing unit (with no problems with air.
I have drained the system several times yesterday to try and clean up as there seems to be a lot of rust in the system. All radiators now work but we still have excessive air. I have now added restorer.
i am unsure the setup is correct as I read some where that condensing boilers are fussy about pump location (but I can't remember where). Or is it the rust (ferric oxide) giving of the gas?
the system is sealed, there is a condensing boiler on The floor, a meter up on the flow is the pump. same level on the return is a magnaclean, then the expansion vessel. The pipe work then rises for another 2 meters before running round the walls for 10 meters. It the tees off with two zone valves, one for CH and one for the water heater. The radiators are 5 metres away in another room.
I have never had a sealed CH system, are the notorious for troublesome bleeding?
Sorry for the long post, I can't post photos.
thanks in advance.