Hi
< Traditional vented system with CW and HW tanks, and 2 motorized valves for CH and HW>
So as we're in summer, I was annoyed to find the CH partially on. I think what happened was that a drayton za5 had yet again failed and was stuck open. So not having much time midweek and not really needing the heating on at all at the moment, I thought I'd remove the head of the valve from the circuit box completely.
I did that and of course that broke the hot water 8-( . When I turn the HW on at the programmer and ensure call for HW is on at cylinder stat, the HW motorised valve opens and I can then hear the relay switch click but the pump doesn't start like it should do. (It was definitely working 5 minutes before I had the daft idea of removing the heating MV).
Is that the normal behaviour when removing one valve from a two MV system? Whilst I'm waiting for the new za5, is there anything I can do to get diagnose why the HW MV isn't turning the pump on?
Thanks a lot in advance for any help.
< Traditional vented system with CW and HW tanks, and 2 motorized valves for CH and HW>
So as we're in summer, I was annoyed to find the CH partially on. I think what happened was that a drayton za5 had yet again failed and was stuck open. So not having much time midweek and not really needing the heating on at all at the moment, I thought I'd remove the head of the valve from the circuit box completely.
I did that and of course that broke the hot water 8-( . When I turn the HW on at the programmer and ensure call for HW is on at cylinder stat, the HW motorised valve opens and I can then hear the relay switch click but the pump doesn't start like it should do. (It was definitely working 5 minutes before I had the daft idea of removing the heating MV).
Is that the normal behaviour when removing one valve from a two MV system? Whilst I'm waiting for the new za5, is there anything I can do to get diagnose why the HW MV isn't turning the pump on?
Thanks a lot in advance for any help.