Hello,
I have finally got around to replacing my antiquated central heating controller and want to install a new digital one.
My old model is a RANDALL 102 and i want to wire in a new UK standard back plate that i can use with a new controller.
My CH system is one with a hot water tank and the old controller allowed you to have either just the hot water on or both the hot water and heating.
I have removed the old controller and am faced with 7 wires.
There are two 3 core cables and a single red wire.
One of the cables is clearly from the mains L N and Earth
I'm assuming the other cable is from the boiler?
The single red wire could be from an old unused room thermostat but i'm not sure?
If anybody could shed some light on which wire needs to go where i would really appreciate it. If it would help i could upload a video to show exactly what i've got.
Many thanks,
Matt
I have finally got around to replacing my antiquated central heating controller and want to install a new digital one.
My old model is a RANDALL 102 and i want to wire in a new UK standard back plate that i can use with a new controller.
My CH system is one with a hot water tank and the old controller allowed you to have either just the hot water on or both the hot water and heating.
I have removed the old controller and am faced with 7 wires.
There are two 3 core cables and a single red wire.
One of the cables is clearly from the mains L N and Earth
I'm assuming the other cable is from the boiler?
The single red wire could be from an old unused room thermostat but i'm not sure?
If anybody could shed some light on which wire needs to go where i would really appreciate it. If it would help i could upload a video to show exactly what i've got.
Many thanks,
Matt