Combi boiler is Main Combi 24 HE.
Optional integral timer fitted, but new baby means it's running 24/7 being controlled by Siemens RAA20 thermostat in the hallway (2 wire 230V control).
Thermostat run on 3C&E (third core & earth unused).
Not ideal heating the house based on the hallway temperature, so bought the HRFS1 wireless thermostat.
It looks like there isn't an easy way to replace the wired thermostat, without chasing wires etc.
Wireless Thermostat Manual
Wiring for 230V app
SL (Off)
L
SL (On)
N
Wiring for External Thermostat Loop
COM - Live Feed from boiler external thermostat loop (volt free feed)
Norm Open - Switched live back to boiler (volt free switch live)
L - Live Mains
N - Neutral Mains
The boiler manual says thermostat loop is 230V switching.
I can't fathom how to wire using the diagram for 230V application.
The diagram 'for external boiler thermostat loop' seems straightforward but mentions volt free feed/switch.
My thoughts were to disconnect hallway thermostat, and wire wireless receiver in next to the boiler using a spur from the boiler feed as a mains supply, but would the 230V switching from the boiler be OK to wire into the wireless receiver (even though it mentions volt free)?
Apologies for the length.
Optional integral timer fitted, but new baby means it's running 24/7 being controlled by Siemens RAA20 thermostat in the hallway (2 wire 230V control).
Thermostat run on 3C&E (third core & earth unused).
Not ideal heating the house based on the hallway temperature, so bought the HRFS1 wireless thermostat.
It looks like there isn't an easy way to replace the wired thermostat, without chasing wires etc.
Wireless Thermostat Manual
Wiring for 230V app
SL (Off)
L
SL (On)
N
Wiring for External Thermostat Loop
COM - Live Feed from boiler external thermostat loop (volt free feed)
Norm Open - Switched live back to boiler (volt free switch live)
L - Live Mains
N - Neutral Mains
The boiler manual says thermostat loop is 230V switching.
I can't fathom how to wire using the diagram for 230V application.
The diagram 'for external boiler thermostat loop' seems straightforward but mentions volt free feed/switch.
My thoughts were to disconnect hallway thermostat, and wire wireless receiver in next to the boiler using a spur from the boiler feed as a mains supply, but would the 230V switching from the boiler be OK to wire into the wireless receiver (even though it mentions volt free)?
Apologies for the length.