Hello!
My name is Luke. I am a new joiner to this forum. I have a problem with one of the vertical radiators I installed. It doesn't heat up at all. The connecting pipes are cold. I tried closing all radiators except for the one in question, but nothing changes (there is a bypass valve, hopefully it works ok). After opening the bleed valve and letting some water out for some time the radiator starts to get warm, but soon after closing the valve it gets cold again. The new radiator is 150cm high and 30cm wide. It replaced a small horizontal simple kudox that was heating up ok. The TRV valve used is Danfoss VHX-Duo (wall connection, see http://heating.danfoss.com/PCMPDF/VDUYQ402_VHX_RAX.pdf). The lockshield valve in this unit is integrated with the TRV valve. One needs a pentagon allen key to turn the lockshield valve (which unfortunately I don't have) so I wasn't able to perform the standard procedure of trying to remove potential airlocks. I called Danfoss and they told me that the lockshield has correct factory setting so I shouldn't need to turn it to make the radiator work.
However, I am slightly suspicious of the way the piping around the radiator is organised. It's a two pipes system. 11 radiators in total. Boiler is Glowworm 30 hx. There is also an unvented water cylinder. Everything is relatively new (installed by a professional 5 years ago), plumbers visiting confirmed good installation of the boilers and the piping around the boiler. The picture I attach to the post presents part of the piping of the central heating (all the pipes are between the ground and 1st floor). The rebel radiator is on the ground floor, the working ok radiator closest to it is on the 1st floor (not sure if it makes any difference). I've noticed that in the vicinity of the unlucky radiator there is some multiple teeing going on at close distance and I was wondering if this is not causing the problem. Can this be a problem or you think the valve might need tuning?
Regards,
Luke
My name is Luke. I am a new joiner to this forum. I have a problem with one of the vertical radiators I installed. It doesn't heat up at all. The connecting pipes are cold. I tried closing all radiators except for the one in question, but nothing changes (there is a bypass valve, hopefully it works ok). After opening the bleed valve and letting some water out for some time the radiator starts to get warm, but soon after closing the valve it gets cold again. The new radiator is 150cm high and 30cm wide. It replaced a small horizontal simple kudox that was heating up ok. The TRV valve used is Danfoss VHX-Duo (wall connection, see http://heating.danfoss.com/PCMPDF/VDUYQ402_VHX_RAX.pdf). The lockshield valve in this unit is integrated with the TRV valve. One needs a pentagon allen key to turn the lockshield valve (which unfortunately I don't have) so I wasn't able to perform the standard procedure of trying to remove potential airlocks. I called Danfoss and they told me that the lockshield has correct factory setting so I shouldn't need to turn it to make the radiator work.
However, I am slightly suspicious of the way the piping around the radiator is organised. It's a two pipes system. 11 radiators in total. Boiler is Glowworm 30 hx. There is also an unvented water cylinder. Everything is relatively new (installed by a professional 5 years ago), plumbers visiting confirmed good installation of the boilers and the piping around the boiler. The picture I attach to the post presents part of the piping of the central heating (all the pipes are between the ground and 1st floor). The rebel radiator is on the ground floor, the working ok radiator closest to it is on the 1st floor (not sure if it makes any difference). I've noticed that in the vicinity of the unlucky radiator there is some multiple teeing going on at close distance and I was wondering if this is not causing the problem. Can this be a problem or you think the valve might need tuning?
Regards,
Luke
