Hi,
I have a boiler running the central heating only and I think the timer switch is broken as it keeps resetting.
The current timer is a Randall E1 (think its quite old) and the heating electrics are a little over complicated.
The E1 has 5 wires to it into: L,N,1,2,3.
1=n/o (i think)
2=comm
3=n/c
I want to replace it and am thinking a Horstman C17 but need help on which wires go to which terminals (C17 has L,N 1,2,3,4)
My set up is a bit strange as it has a frost stat (yes.. inside the house) as well as a room stat, Plus wires in from the bolier and pump
Currently I think one of the frosts stat wires goes into the E1, also one of the room stat wires goes into the E1. (can't remember where the other going into the E1 is from - as i am writing this from work!)
Total wires into the junction box:
Frost stat (blue,brown,earth)
room stat (yellow,red, blue, earth)
bolier/pump (earth, 2 black, 1 brown, 1 blue)
power in (E,L,N)
can anyone help?
I have a boiler running the central heating only and I think the timer switch is broken as it keeps resetting.
The current timer is a Randall E1 (think its quite old) and the heating electrics are a little over complicated.
The E1 has 5 wires to it into: L,N,1,2,3.
1=n/o (i think)
2=comm
3=n/c
I want to replace it and am thinking a Horstman C17 but need help on which wires go to which terminals (C17 has L,N 1,2,3,4)
My set up is a bit strange as it has a frost stat (yes.. inside the house) as well as a room stat, Plus wires in from the bolier and pump
Currently I think one of the frosts stat wires goes into the E1, also one of the room stat wires goes into the E1. (can't remember where the other going into the E1 is from - as i am writing this from work!)
Total wires into the junction box:
Frost stat (blue,brown,earth)
room stat (yellow,red, blue, earth)
bolier/pump (earth, 2 black, 1 brown, 1 blue)
power in (E,L,N)
can anyone help?
