Hello and thanks to all that answer,this is a follow on from a post earlier this week but i've started a new thread to prevent confusion.
I'm changing a broken drayton programmer (not digital) for a drayton LP111 connected to a vaillant . The backplate is wired exactly the same so an easy swop.But i had a few questions/confirmations:
1) Why is terminal 2 live when the programmer isn't demanding heat?Its not connected to anything on my set up. My guess is its for boilers with other functions?
2) At the moment terminal 3 (programmer switched live) runs to the boiler to demand heat.To wire a honeywell thermostat i will wire terminal 3 to the thermostat returning to the boiler for the demand when the thermostat requires it?
3) The Thermostat requires a neutral, is this for the anticipator? and can i utilise the N on the programmer backplate or do i have to run it to terminal 5 on the boiler (as the vaillaint manual suggests) which is also a nuetral but not used so far.
Anythoughts appreciated.
I'm changing a broken drayton programmer (not digital) for a drayton LP111 connected to a vaillant . The backplate is wired exactly the same so an easy swop.But i had a few questions/confirmations:
1) Why is terminal 2 live when the programmer isn't demanding heat?Its not connected to anything on my set up. My guess is its for boilers with other functions?
2) At the moment terminal 3 (programmer switched live) runs to the boiler to demand heat.To wire a honeywell thermostat i will wire terminal 3 to the thermostat returning to the boiler for the demand when the thermostat requires it?
3) The Thermostat requires a neutral, is this for the anticipator? and can i utilise the N on the programmer backplate or do i have to run it to terminal 5 on the boiler (as the vaillaint manual suggests) which is also a nuetral but not used so far.
Anythoughts appreciated.