My mate has asked me to have a look at his central heating, since its recently had a mind of its own, sometimes firing up, sometimes not.
A plumber who has had a look at the boiler reckons its the old cream/brown drayton tempus seven programmer, probably about 20 years old. I had a look at it yesterday, and all seemed fine, it was switching the load to the stat etc on request.
Anyway it packed up again last night. Does anyone know of a direct replacement for this programmer, possibly the new tempus seven? I'm a commercial spark who has little experience of domestic heating systems. I believe it is a fully pumped system.
The wallplate is standard and has the following connections.
N, L, 1 (N/O HW), 2 (N/O CH), 3 HW SW LIVE, 4 CH SW LIVE
Any help would be greatly appreciated.
Cheers Anthony
A plumber who has had a look at the boiler reckons its the old cream/brown drayton tempus seven programmer, probably about 20 years old. I had a look at it yesterday, and all seemed fine, it was switching the load to the stat etc on request.
Anyway it packed up again last night. Does anyone know of a direct replacement for this programmer, possibly the new tempus seven? I'm a commercial spark who has little experience of domestic heating systems. I believe it is a fully pumped system.
The wallplate is standard and has the following connections.
N, L, 1 (N/O HW), 2 (N/O CH), 3 HW SW LIVE, 4 CH SW LIVE
Any help would be greatly appreciated.
Cheers Anthony
