Replacing old Satchwell TL25T Room Thermostat

[derekbolster]

Hope someone can steer me in the right direction.
I'm trying to replace the Satchwell TL25T (that's what I think it is anyhow - see http://www.facebook.com/photo.php?pid=31670958&l=817c12215f&id=1025452494 ) thermostat in my mother in law's house with a Sunvic TLX4101.
After blowing a fuse at my first attempt to connect it up, I've decided to put it all back together and retire to seek help.
I have 3 wires plus an earth going to the TL25T, connected as follows:
Terminal 1 Black Wire (seems to have approx 30v AC)
Terminal 2 empty
Terminal 3 Red Wire (has approx 2-3v)
Terminal 4 Yellow (earth core in twin & earth) - 30v AC
.
The Sunvic has 3 terminals:
Terminal 1 - Demand
Terminal 2 - Common
Terminal 3 - Satisfied

My question is, what wire should go where? and have I got the right sort of replacement in the first place?

 

[Taylortwocities]

First of all, look at the WIKI

//www.diynot.com/wiki/electrics:how_to_replace_a_room_stat

next, your new stat does not need a neutral. Assuming it has been wired prperly then do not use the black wire. put it in a piece of terminal block (per the grey wire in the link above). Connect the other wires
Red > common
Yellow > demand

simples

Meerkat

• Taylortwocities
• 11 Dec 2009
• 53