HELP thermostat wiring

[Walsh]

Hi all

I have to replace my room thermostat but I can't understand the wiring diagram on the new stat.
The old stat was a Sunvic TLX9201 with 3 wires connected.
Brown wire to terminal 1 (com) blue wire to 4(N) and green/yellow wire to 3 (demand). Terminal 2(satisfied) had no connection.

The new stat is a Honeywell T6360 and looking at the wiring diagram it shows L to terminal 1, N to 3, heating load to 2. and a hatched line labelled cooling load to 4. Am I right to assume that 1 is brown wire, 3 is blue wire, and 2 is green/yellow wire.

Any help appreciated as the wife reckons Winter is here.

Thanks

 

[kevplumb]

Brown wire to terminal 1 (com) blue wire to 4(N) and green/yellow wire to 3 (demand). Terminal 2(satisfied) had no connection.

meanwhile back at the ranch

 

[Rob]

1 is common

3 is demand

2 is neutral connection

 

[kevplumb]

1 is common

3 is demand

2 is neutral connection

green and yellow is CPC or even earth

 

[Walsh]

Hi Rob and thanks for a speedy reply.

Are you saying my assumption is correct terminal 1 is brown, 3 is blue and 2 is earth

 

[stardanny]

The old stat was a Sunvic TLX9201 with 3 wires connected.
Brown wire to terminal 1 (com) blue wire to 4(N) and green/yellow wire to 3 (demand).

What sort of wire? is it grey T & E or flex?

Sound like it using cpc / earth wire as a switch live.

Dan

 

[Walsh]

Hi Stardanny

Thanks for the interest, it's twin and earth

 

[kevplumb]

Hi Stardanny

Thanks for the interest, it's twin and earth

then you shouldnt be using the earth as a switched live

without at least sleeving it the right colour

 

[Rob]

1 is common

3 is demand

2 is neutral connection

green and yellow is CPC or even earth

I was just stating what the new stat connections are as OP has interpretted them incorrectly

If its t+e then you'll have to do away with the neutral.

Dont use the earth as any live conductor!

 

[stardanny]

Hi Stardanny

Thanks for the interest, it's twin and earth

Then it's using cpc / earth as a switch live. Do not do that.

Replace the cable with 3 core and earth. Get a sparky in.

Rob, stat will not work correctly without neutral.

Dan.

 

[Walsh]

I have inherited this wiring, so what coluor should it be covered with, black?

 

[kevplumb]

red/brown

you shouldnt be using it is the correct advice

but seeing as you are you might as well give any poor bugger that goes anywhere near it in the futre a fighting chance

 

[stardanny]

Best to ask in Electric Forum.

CPC / Earth cannot be used for live conductor.

It will need a new 3 core and earth. No other way.

Dan

 

[kevplumb]

tbf danny it was done a lot years ago

before you had to fill a form out before you farted

 

[stardanny]

I know it was done years ago but this is the best advice I can give.