In message , raden
writes
In message .com,
Diablo360 writes
Trying to replace broken CH programmer. Old, not even sure of type but
wiring is as follows.

3 cables coming in.
snip

I want to put Drayton SM2 Mechanical timer on this.
On Drayton Wiring is N L HWOff CHOff HWOn CHOn

Would the wiring be like this?

snip

Thank you for your time.

Who knows ?

Without even a clue as to which make/model

I would have expected 2-3 and 5-6 to be the "ON" contacts

Why don't you try and understand what's going on, then you are more
likely to get it right


Indeed, a couple of suggestions to the OP. Post a piccie somewhere (not
on the group) of the old one. some one may well know it. 2. Try to work
out what the various cables coming in are to/from
--
Chris French