Hi Folks,
this is my first post here so please be gentle!
The last few days I have noticed that whenever the HW is on, the radiators are getting hot too, this is with the programmer set to HW only. I've done some tests and wondered if anyone can point me in the right direction...
The programmer is a Potterton EP2001. Its connected to a Honeywell V4073A1039 valve, my suspicion is either the valve or the programmer is faulty. I've measured the voltages on the valve wires and they are as follows:
HW+CH on: white 240V, grey 240V, orange 240V
HW only: white ~75V, grey 240V, orange 240V
CH only: white 240V, grey 240V, orange 0V
All off: white ~40V, grey 240V, orange 240V
This does not seem to agree with the Honeywell docs for the valve which says:
HW only: no power
HW + CH: white 240V
CH only: white 240V, grey 240V, orange 240V
Hold last: grey 240V, orange ~100V
Any ideas? Which is most likely to have failed?
- Keith
this is my first post here so please be gentle!
The last few days I have noticed that whenever the HW is on, the radiators are getting hot too, this is with the programmer set to HW only. I've done some tests and wondered if anyone can point me in the right direction...
The programmer is a Potterton EP2001. Its connected to a Honeywell V4073A1039 valve, my suspicion is either the valve or the programmer is faulty. I've measured the voltages on the valve wires and they are as follows:
HW+CH on: white 240V, grey 240V, orange 240V
HW only: white ~75V, grey 240V, orange 240V
CH only: white 240V, grey 240V, orange 0V
All off: white ~40V, grey 240V, orange 240V
This does not seem to agree with the Honeywell docs for the valve which says:
HW only: no power
HW + CH: white 240V
CH only: white 240V, grey 240V, orange 240V
Hold last: grey 240V, orange ~100V
Any ideas? Which is most likely to have failed?
- Keith