Old satchwell thermostat.

[Kmass]

Can anybody please tell me which model this is?.

 

[Madrab]

looks like an old TLX (2203 maybe), there were several versions of the same stat

 

[Kmass]

Thanks. I have contacted the manufacturer, now called Sunvic and have sent images. I am just waiting for a reply from them.
Regards,
Ken.

 

[CBW]

Any reason why you want/need to know?

 

[Kmass]

I think it's the TLX 2356 but not totally sure.

 

[Kmass]

This wiring has baffled a heating engineer. So I think the best thing to do is to replace with the exact same type and connect to the same terminals and hopefully all will be good.

 

[gas112]

live and neutral to it , then two lives away from it for motor on motor off satchwell motorised valve

 

[ianmcd]

That wiring couldnt be more simple, a very basic early thermostat

 

[CBW]

That wiring couldnt be more simple, a very basic early thermostat

 

[Kmass]

There are 2 cables attached with old red, black and earth wires, plus one single red wire. The heating engineer couldn't understand why there is 2 cables. So I figured that as it was working fine before I managed to break it, the easiest thing is to replace with the same and connect to the same. Just want to know which model.

 

[Madrab]

https://www.ebay.co.uk/itm/Sunvic-Satchwell-Room-Thermostat-TLX2259-/254289641220

 

[ianmcd]

wire colours mean absolutely nothing in a heating system

 

[Terrywookfit]

There are 2 cables attached with old red, black and earth wires, plus one single red wire. The heating engineer couldn't understand why there is 2 cables. So I figured that as it was working fine before I managed to break it, the easiest thing is to replace with the same and connect to the same. Just want to know which model.

FFS. Live, Neutral, Earth, and switched live.... in no particular order.

He is no fookin Heating Engineer if he can't figure that !!

 

[gas112]

terminal 1 = demand (power to motorised valve to turn it on )
terminal 2 = satisfied (power to motorised valve to turn it back off)
terminal 3 = common (live in )
terminal 4 = neutral
earth went onto metal plate at back of it
terminals
good chance the motorised valves have been changed at some point to spring return and the satisfied wire is no longer required

 

[oilhead]

The full reference will be on the wiring diagram inside the case. This would also have identified the wiring.
Any number of changeover thermostats would be a suitable replacement, Honeywell, Drayton, etc.