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- 29 Feb 2012
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My existing Honeywell has 3 wires connected to it. L, N and heating load. The new Salus I have bought shows 4 connections L, N, Comm, NO (Normally Open).
So the L and N I can deal with but which of the other two terminals will the heating load wire connect to? I would assume the NO, but will that be connected to L when the unit switches to heat demand?
My system has:-
1 x boiler
2 x zone valves (one for upstairs heating and one for downstairs heating)
2 x room stats (one upstairs and one downstairs)
It is the downstairs one that I want to change out as it is hidden by wall hangings.
So the L and N I can deal with but which of the other two terminals will the heating load wire connect to? I would assume the NO, but will that be connected to L when the unit switches to heat demand?
My system has:-
1 x boiler
2 x zone valves (one for upstairs heating and one for downstairs heating)
2 x room stats (one upstairs and one downstairs)
It is the downstairs one that I want to change out as it is hidden by wall hangings.