That's correct.Live and Neutral of relay connected up to programmer L & N
I assume you are locating the relay box where the old Room Stat used to be.Relay A and B connected up to Room Stat connectors 1 and 3.
If you mean no voltage between A and B when relay is on, there won't be any. You have to measure between A and N or B and N.When relay switches on I measure continuity between relay A and B but no voltage. When it switches off no continuity, obviously no voltage.
T1 is usually the permanent supply to the wiring centre; T2 is normally neutral and T3 earth.I measure 240V constantly between terminals 1 and 3 on the wiring centre no matter what setting of Central heating on the programmer.
It shouldn't!I have a ST9400c programmer if this makes a difference.
Ah! So terminals 1 and 3 refer to terminals on the boiler.This is not to replace any previous stat that was fitted this is to add some extra control as bored on relying on programmer and boiler stat to regulate heat in house.
Then terminals 1 and 3 are obviously not the correct ones to use!No terminals 1 & 3 are on the wiring centre. I am confusing things with mentioning the heat controller on the boiler and calling it a stat.
That's correct.The one valve I have is a honeywell three port, ( Y Plan set up ). To get the Thermostat working I was thinking of using the relay to intercept the feed from the programmer to the wiring centre.
This would be true for a programmable stat, but you have been talking about the DT92E, which is not programmable.By setting programmer to constant CH then this set up should let me have full control via the thermostat.
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