First post, advice appreciated.
Problem: Stelrad K2 Compact 600 x 1600 radiator, hot at top, no heat bottom or left hand side.
(2 new rads in new extension added to system. One hot all over - top mounted TRV on feed, one never hot all over - top mounted TRV on return. Top mounted TRV essential - elderly user. B Gas say installation incorrect - coming to change pipework, want to be ready!)
Radiator: small pipe (10mm?), feed bottom right hand lock shield valve, return top left TRV - Danfoss RA-FS flow selectable valve (grey direction selector arrows), RAS-C2 sensor (also tried RAS-D2), last radiator in system. Installer: Corgi registered, ex B Gas.
System: Worcester 280 RSF gas combi, sealed system, 11 radiators, bungalow, pipes down from loft - all other TRV on feed (2 top mounted Stelrad) with no problems.
Tried (thanks to info read on this site) : a) bleeding - no air, b)all radiators off except this last one to force through - no change, c) check valve pin - free moving, d) leave TRV off - no change, e) tried both arrow selections on flow selectable valve (checked Danfoss site - v helpful) - no difference. Grateful for guidance.
Problem: Stelrad K2 Compact 600 x 1600 radiator, hot at top, no heat bottom or left hand side.
(2 new rads in new extension added to system. One hot all over - top mounted TRV on feed, one never hot all over - top mounted TRV on return. Top mounted TRV essential - elderly user. B Gas say installation incorrect - coming to change pipework, want to be ready!)
Radiator: small pipe (10mm?), feed bottom right hand lock shield valve, return top left TRV - Danfoss RA-FS flow selectable valve (grey direction selector arrows), RAS-C2 sensor (also tried RAS-D2), last radiator in system. Installer: Corgi registered, ex B Gas.
System: Worcester 280 RSF gas combi, sealed system, 11 radiators, bungalow, pipes down from loft - all other TRV on feed (2 top mounted Stelrad) with no problems.
Tried (thanks to info read on this site) : a) bleeding - no air, b)all radiators off except this last one to force through - no change, c) check valve pin - free moving, d) leave TRV off - no change, e) tried both arrow selections on flow selectable valve (checked Danfoss site - v helpful) - no difference. Grateful for guidance.