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It's a friends system won't get chance to try it till tomorrow pm. I'll post to the thread when I've tried it. Cheers

Aha, checked with Drayon technical staff before fitting Tempus 7 and was told to set programmer to Gravity. So much for advice from the source! Thanks to all who responded

Ok just to give a bit more background. It's on a 3 amp spur and yes(and no) its suddenly appeared I'll explain more. The system was installed in the 60's or maybe 70's the existing timer was electro mechanical (not danfoss Randall dial type think older more like a street light timer switch) This...

System: Boiler Worcester Danesmore 15/19, Honeywell 2 wire tank stat, Honeywell DT90 roomstat, Drayton Tempus 7 controller And Honeywell sundial wiring centre. It's wired C Plan ( gravity HW with 2 port valve, pumped CH) Problem: I guess the issue is either the programmer wiring or the valve...

Thanks for the swift response:)

I know this is a variation on a well worn theme so apologies in advance. I need to wire in a Honeywell Dt90e thermostat which is a 2 wire thermostat but the sundial wiring centre has 4 connections numbered 1 to 3 and earth so not sure which ones to connect to. The system is C plan gravity HW...

A bit more info if its any help. I've just had a look at the connections "block" . Orange, grey and white from the 2 port valve are not connected to anything

I've just replaced a Danfoss 102 with a Tempus 7 to get more programming flexibility and lo and behold I cannot get Ch independantly of HW. Whilst this isn't the end of the world (its what we had with the Danfoss) It would be nice to use CH onits own. I seem to recall having this problem with...