I don't really get involved with heating all that much, but I have the problem below in my house
Problem: When controller is calling for HW the rads heat up, despite CH not calling for heat
Components:
Vented System Boiler & HWC
Controller: Potterton EP2000
Boiler: Glow worm Fulesaver 45F
3 Port Valve: Honeywell Sundial Y-Plan
Steps to identify fault (Tested by switching controls from Auto to 24H)
1) Controller set to HW only, room stat off, HW heats, as do rads
2) Controller set to CH only, room stat off, no heat
3) Controller set to CH only, room stat above room temp, CH heats, HW gets warm but not as hot as the rads
4) When operating controller with the cover off the valve head, the HW control actuates the motor but the CH control causes no movement in the motor, either calling for heat or not.
I'm suspecting either a faulty motor or the valve is seized. I'm hoping it's just the head as I can manage that, but I'm not going to just change it for the sake of it
Thanks for any input on anything else to check, or what has failed
Problem: When controller is calling for HW the rads heat up, despite CH not calling for heat
Components:
Vented System Boiler & HWC
Controller: Potterton EP2000
Boiler: Glow worm Fulesaver 45F
3 Port Valve: Honeywell Sundial Y-Plan
Steps to identify fault (Tested by switching controls from Auto to 24H)
1) Controller set to HW only, room stat off, HW heats, as do rads
2) Controller set to CH only, room stat off, no heat
3) Controller set to CH only, room stat above room temp, CH heats, HW gets warm but not as hot as the rads
4) When operating controller with the cover off the valve head, the HW control actuates the motor but the CH control causes no movement in the motor, either calling for heat or not.
I'm suspecting either a faulty motor or the valve is seized. I'm hoping it's just the head as I can manage that, but I'm not going to just change it for the sake of it
Thanks for any input on anything else to check, or what has failed