Hi All,
I want to fit a Honeywell 641B pipe stat to a Honeywell S plan system, which does not include a frost stat. However, I want to use the pipe stat, so that it switches the system ON when the temp drops.
I have been looking at the many Honeywell electrical diagrams, but cannot find one that directly tells me explicitly how to do this.
My best guess, based on what I can find, is that it should be connected as a 2-wire unit across terminals 1 & 5 on the junction box - which would correspond to live and the input to the motorised valve, but I am not sure.
If anybody is fully clued up on this and could help I would be very grateful.
Thanks
Paul
I want to fit a Honeywell 641B pipe stat to a Honeywell S plan system, which does not include a frost stat. However, I want to use the pipe stat, so that it switches the system ON when the temp drops.
I have been looking at the many Honeywell electrical diagrams, but cannot find one that directly tells me explicitly how to do this.
My best guess, based on what I can find, is that it should be connected as a 2-wire unit across terminals 1 & 5 on the junction box - which would correspond to live and the input to the motorised valve, but I am not sure.
If anybody is fully clued up on this and could help I would be very grateful.
Thanks
Paul