I'm replacing a Danfoss RET230P dial-type room thermostat with a Salus RT300 digital one in our upstairs 'zone'.
I thought it would be easy because I did something similar a few years ago downstairs replacing an old dial Honeywell with a digital DT200 Honeywell. There were just two brown wires coming out of the wall, which was simple enough to work out.
However, upstairs the Danfoss appears to have a blue wire going into N and a brown into L. Then there are 3 more terminals collectively labelled "Output" which are each labelled as follows:
1 ON - Has a blue wire connected
2 OFF - Nothing connected
3 COM - Has a bridging wire connected back to the L terminal
The new RT300 has just these terminals:
"L (Mains Live)"
"SL (Switched Live - Normally Open Contact)"
Also "Earth Parking (No electrical connection)"
So I'm not sure what to do with my 3 wall wires?
I thought it would be easy because I did something similar a few years ago downstairs replacing an old dial Honeywell with a digital DT200 Honeywell. There were just two brown wires coming out of the wall, which was simple enough to work out.
However, upstairs the Danfoss appears to have a blue wire going into N and a brown into L. Then there are 3 more terminals collectively labelled "Output" which are each labelled as follows:
1 ON - Has a blue wire connected
2 OFF - Nothing connected
3 COM - Has a bridging wire connected back to the L terminal
The new RT300 has just these terminals:
"L (Mains Live)"
"SL (Switched Live - Normally Open Contact)"
Also "Earth Parking (No electrical connection)"
So I'm not sure what to do with my 3 wall wires?