Good evening all,
I'm mid-way through a project which has involved moving 2 radiators and branching off one of these to install a new radiator.
I did all the first-fixing a while ago (drained down, made break-ins etc...) and today I have drained down again and made the final connections.
I refilled the system (adding inhibitor), bled, topped up and fired everything up.
The 2 radiators that consist of one that I've moved and the new one don't seem to be getting any heat circulating. The other radiator I moved is fine and the rest of the house is toasty.
They bled fine and have water at them, but they're not heating up.
My initial thought was that the branching (10mm tee off a 10mm pipe) was too small and the pump wasn't able to circulate. So, I isolated one and turned the pump up to max speed and took the dog for a walk. I've just got back and it's still stone cold.
SO far I've thought;
1 - Blockage - But it filled up OK
2 - Crossed flow/return - The TRVs are bi-directional so this shouldn't make a difference
3 - 10mm pipe serving 2 rads is too small - Need to get out my sizing tables, BUT would have thought they would at least get some heat to them
4 - Too much resistance - Isolated one rad completely and turned the pump up
5 - TRV stuck - I've taken the heads of and manually worked the valves and left them both (and the LSV fully open)
Tomorrow (when I'm full of the enthusiasm of a new day) I'm going to try shutting all of the other rads on the zone downstairs to see if it's a balancing issue.
Would any of you lovely people care to make any suggestions as to anything else to try?
Many thanks!
I'm mid-way through a project which has involved moving 2 radiators and branching off one of these to install a new radiator.
I did all the first-fixing a while ago (drained down, made break-ins etc...) and today I have drained down again and made the final connections.
I refilled the system (adding inhibitor), bled, topped up and fired everything up.
The 2 radiators that consist of one that I've moved and the new one don't seem to be getting any heat circulating. The other radiator I moved is fine and the rest of the house is toasty.
They bled fine and have water at them, but they're not heating up.
My initial thought was that the branching (10mm tee off a 10mm pipe) was too small and the pump wasn't able to circulate. So, I isolated one and turned the pump up to max speed and took the dog for a walk. I've just got back and it's still stone cold.
SO far I've thought;
1 - Blockage - But it filled up OK
2 - Crossed flow/return - The TRVs are bi-directional so this shouldn't make a difference
3 - 10mm pipe serving 2 rads is too small - Need to get out my sizing tables, BUT would have thought they would at least get some heat to them
4 - Too much resistance - Isolated one rad completely and turned the pump up
5 - TRV stuck - I've taken the heads of and manually worked the valves and left them both (and the LSV fully open)
Tomorrow (when I'm full of the enthusiasm of a new day) I'm going to try shutting all of the other rads on the zone downstairs to see if it's a balancing issue.
Would any of you lovely people care to make any suggestions as to anything else to try?
Many thanks!