Changing my thermostat from honeywell T6360b to Cm921

[leecroc]

Hi all

I have a T6360b which has 3 wires and i would like to change it to a CM921 which has only two on the wiring dirgram how can i change this.

help please

 

[seco services]

T6360b

1 - Heating live from programmer
2 - Neutral
3 - Switch live


CM921

N - Neutral
L - Live
A - Live
B - Switch live

 

[glasgowgas]

seco

am i right,

original 1 wired to L
original 2 wired to N
link fom L to A
original 4 wired to B

 

[seco services]

seco

am i right,

original 1 wired to L
original 2 wired to N
link fom L to A
original 4 wired to B

3 to B not 4 there is no 4
and heating at programmer on constant.

 

[glasgowgas]

seco

am i right,

original 1 wired to L
original 2 wired to N
link fom L to A
original 4 wired to B

3 to B not 4 there is no 4
and heating at programmer on constant.

yep meant that, typo or vodka kicking in!!!!!!! View media item 11691 View media item 11691 View media item 11691

 

[leecroc]

thanks i will give it a go

 

[D_Hailsham]

The T6360 was just a thermostat; the CM921 is a combined programmer and thermostat. If you connect the wire which was on stat terminal 1 to L you must set the existing time switch to CH always ON. Alternatively, and I think the better way, is to find the other end of the wire connected to terminal 1 and move it to a permanent live; the existing CH timer is then completely bypassed.