Replacing Satchwell TL25

[Higson23]

Hi, I'm trying to replace a satchwell tl25 with a Honeywell T3R. Does anyone know which terminals are what in the old satchwell?

 

[Justin Passing]

If you do a web search...

Satchwell valve wiring help please -SOLVED

Hello, I have this Satchwell valve installed in my CH system. Yes, I know its old, but it works and I have no need to replace it - hopefully!! I am trying to work out the wiring on the valve. I assume two of the wires operate the spring return valve(?) and the other two are a switch which...

www.diynot.com

 

[Deleted member 267285]

Is there a wiring diagram on the reverse of the cover? Can you take a better photo? With the T3R you’ll need a permanent live and permanent neutral for the receiver - so you’ll need to confirm what system you have. Above link takes you to a Satchwell motorised valve, not a thermostat. Also would have been better posted on Electrics or plumbing and heating forum, not general discussion.

 

[gas112]

OP you will really struggle to find a wiring diagram for it as they are that old .
that stat would have originally have been powering a satchwell /sunvic motor on motor off valve motorised valve
;;

so wires will probably be
live from clock
neutral
earth
live back to valve to motor it on when stat calling
live back to valve when stat satisfied to motor it off.
so knowledge of how to use multimeter to work them out will be required

. What sort of system do you have do you still have satchwell motorised valves or honeywell
or do you now have a combi

 

[gas112]

Is there a wiring diagram on the reverse of the cover? Can you take a better photo? With the T3R you’ll need a permanent live and permanent neutral for the receiver - so you’ll need to confirm what system you have. Above link takes you to a Satchwell motorised valve, not a thermostat. Also would have been better posted on Electrics or plumbing and heating forum, not general discussion.

told you see my previous comment about justin passin been removed