So do new ones, if you remember the recent post about a Honeywell stat....breezer said:
boiler/thermostat
- Thread starter mini2
- Start date
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If you are unsure run two separate twin and earths from the boiler to the stat and use a RTS4 stat
One twin will supply the stat (N & L terminals), from FCU, or 240V timeclock
and the other will supply the switching for the heating (1 & 3 terminals)
If the boiler is of a volt free (elv switching) you will have to use a separate box to connect the elv cores to the boiler stat terminals
One twin will supply the stat (N & L terminals), from FCU, or 240V timeclock
and the other will supply the switching for the heating (1 & 3 terminals)
If the boiler is of a volt free (elv switching) you will have to use a separate box to connect the elv cores to the boiler stat terminals
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