Hi,
I'm thinking about replacing my current room thermostat (an ACL Model TS142) with an RF unit, and the Honeywell CM927 seems to get a few positive comments on this forum.
I have a query about the electrical wiring for this unit. Does the RF unit need a permanent mains supply, or can I wire it into the Common and Neutral wires from my old unit? As I understand, the Common wire is switched from the CH timer so is not always live.
I have looked at the Honeywell manual for the product and the wiring for using the CM927 as a zone valve controller (image below) and it looks like it needs a permament supply. Is this right, or can I put it on the Common / Neutral supply?
If this unit won't work, can anyone recommend an RF unit that will work?
Thanks!
I'm thinking about replacing my current room thermostat (an ACL Model TS142) with an RF unit, and the Honeywell CM927 seems to get a few positive comments on this forum.
I have a query about the electrical wiring for this unit. Does the RF unit need a permanent mains supply, or can I wire it into the Common and Neutral wires from my old unit? As I understand, the Common wire is switched from the CH timer so is not always live.
I have looked at the Honeywell manual for the product and the wiring for using the CM927 as a zone valve controller (image below) and it looks like it needs a permament supply. Is this right, or can I put it on the Common / Neutral supply?
If this unit won't work, can anyone recommend an RF unit that will work?
Thanks!