Hi
I've been trying to balance my Central heating system to solve a long running issue with 3 down stairs radiators taking a long time to get hot. The system is an open vented system with 12 Rads ( 4 upstairs and 8 down) At the same time, in our living room we have one of these heaters ( Pls see attachment, not sure what type its called ) that blows warm air from Central heating pipes. I'm pretty sure that it is Tee'd from the main 22mm flow and return pipes before the 3 radiators that are taking a long time to heat up. These 3 Rads are the last in line. I've had all 3 rads off and flushed them out, but there was not a lot of crud in them. Whilst I had each radiator off, I checked the flow coming from the Locksheilds by connecting a hose to them and seeing what flow I got into a bucket and it appeared a good steady flow. Ditto for the TRV connections, so I don't think the problem can be a blockage. I dose up the system every year with inhibitor, and there's a Magnaclean fitted just before boiler on the return so I think the system is pretty clean. The water from the radiators was crystal clear anyway. All upstairs radiators and the ones that heat up quickly downstairs presently have the locksheilds open 1/2 turn and seem to heat up ok.
Back to this heater. the pipes running into the back look like 8 or 10mm, and they are getting hot very quickly, so my question is, could this heater be robbing the flow from the last 3 radiators. I don't see any way of throttling back the flow on the pipes. If there is no means of doing this, what's my best option to try and reduce the flow to this. Just to add, normally we only have one Radiator on upstairs, and 5 on down stairs. With all Radiators turned off except the ones that take a while to warm up, they still take quite a while.
I Tried turning the Pump speed up to 3 ( Grundfoss Selectic 15-50) but it made little difference . The boiler is a Firebird Popular 90.
any Ideas ??
I've been trying to balance my Central heating system to solve a long running issue with 3 down stairs radiators taking a long time to get hot. The system is an open vented system with 12 Rads ( 4 upstairs and 8 down) At the same time, in our living room we have one of these heaters ( Pls see attachment, not sure what type its called ) that blows warm air from Central heating pipes. I'm pretty sure that it is Tee'd from the main 22mm flow and return pipes before the 3 radiators that are taking a long time to heat up. These 3 Rads are the last in line. I've had all 3 rads off and flushed them out, but there was not a lot of crud in them. Whilst I had each radiator off, I checked the flow coming from the Locksheilds by connecting a hose to them and seeing what flow I got into a bucket and it appeared a good steady flow. Ditto for the TRV connections, so I don't think the problem can be a blockage. I dose up the system every year with inhibitor, and there's a Magnaclean fitted just before boiler on the return so I think the system is pretty clean. The water from the radiators was crystal clear anyway. All upstairs radiators and the ones that heat up quickly downstairs presently have the locksheilds open 1/2 turn and seem to heat up ok.
Back to this heater. the pipes running into the back look like 8 or 10mm, and they are getting hot very quickly, so my question is, could this heater be robbing the flow from the last 3 radiators. I don't see any way of throttling back the flow on the pipes. If there is no means of doing this, what's my best option to try and reduce the flow to this. Just to add, normally we only have one Radiator on upstairs, and 5 on down stairs. With all Radiators turned off except the ones that take a while to warm up, they still take quite a while.
I Tried turning the Pump speed up to 3 ( Grundfoss Selectic 15-50) but it made little difference . The boiler is a Firebird Popular 90.
any Ideas ??
