Hi,
I have a sealed system with 18 Rads/towel rads which is run by a greenstar boiler with a sealed hot water tank. I'm using a tado thermostat and the Pump is a 15/50 Groundfos.
The issue is there are two radiators that are cold.
So I closed down every radiator except for these two, apart from the two towel radiators which are connected to the hot water loop, and this got the radiators nice and hot quite quickly. But when you slowly add the other radiators back into the system they have gone cold again. I then presumed that there must be air in the system as there was no air to bleed from the rads. To remedy this I attached a drain cock to the offending rads, closed down the rest of the rads and closed off the trv side and opened the return lockshield. letting water out through the draincock there was some air, I then closed the Lockshield side and repeated the process on the trv side, once again releasing some air from the system. Once the heat was back on once again the rads were very hot and once again when the other rads came on the offending rads became cold. Following on from that the next phase was to go through and balance the rads with a thermometer, this also hasn't had the desired effect, as the rads are still cold. I can normally get some heat, nowhere near as much heat as the other rads, by turning off some of the bigger rads completely around the house, but this does seem counter productive in heating the whole house!
I'm just about to bleed the rads again, just in case there is air in the system, as the boiler man emptied a rad to add inhibitor when he did the service. But the problem was there prior to his servicing the boiler as was all the work I had done.
Any thoughts or ideas would be gratefully received, especially as the rads in question are in the MIL room and she just whacks on the electric fire and unsurprisingly moans about it alot!!
I have a sealed system with 18 Rads/towel rads which is run by a greenstar boiler with a sealed hot water tank. I'm using a tado thermostat and the Pump is a 15/50 Groundfos.
The issue is there are two radiators that are cold.
So I closed down every radiator except for these two, apart from the two towel radiators which are connected to the hot water loop, and this got the radiators nice and hot quite quickly. But when you slowly add the other radiators back into the system they have gone cold again. I then presumed that there must be air in the system as there was no air to bleed from the rads. To remedy this I attached a drain cock to the offending rads, closed down the rest of the rads and closed off the trv side and opened the return lockshield. letting water out through the draincock there was some air, I then closed the Lockshield side and repeated the process on the trv side, once again releasing some air from the system. Once the heat was back on once again the rads were very hot and once again when the other rads came on the offending rads became cold. Following on from that the next phase was to go through and balance the rads with a thermometer, this also hasn't had the desired effect, as the rads are still cold. I can normally get some heat, nowhere near as much heat as the other rads, by turning off some of the bigger rads completely around the house, but this does seem counter productive in heating the whole house!
I'm just about to bleed the rads again, just in case there is air in the system, as the boiler man emptied a rad to add inhibitor when he did the service. But the problem was there prior to his servicing the boiler as was all the work I had done.
Any thoughts or ideas would be gratefully received, especially as the rads in question are in the MIL room and she just whacks on the electric fire and unsurprisingly moans about it alot!!
