Horstmann RFT1 Thermostat.(as i can tell you guys love them)

oddjob1 said:
Only 2 power wires are entering the loom bottom both greys.
1 is the old thermo
Click to expand...
Yes.

and teh other the pwoer supply.
This is a 3 core Red ,Black ,Earth
Click to expand...
No it isn't.
It's Brown, Blue & E. Where does this cable come from?
This what I originally thought was power supply but it should not be connected to the orange from the motorised valve and two other wires.
This must be a switched live.

Which meets top right grey a 2 core
Black and Earth at Number 5 on the loom.

Seeeing as that is the only Power Supply i can see coming in may i be right in saying that the wire from the old Programmer at 5 is the constant live and the other wire from old control
3 core 2x red and Black would be the calling wire
Click to expand...

I'm not sure. It seems to be wired 'unusually.

It doesn't matter anyway if everything works as it should.

You merely have to identify a permanent live or a live calling for CH from the existing programmer to power the new receiver.
 
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OK i think i have it?
I will digest it all and if not i definately wont attempt it
Thankyou so much :)
 
Could i just clarify these actions one last time as im missing an E and Live question below Please realy not attempting it unless clear headed on the activity and will now be done tomorrow in daylight. :)


I have a 3 core Blue Brown Earth cable , which i think needs to be in 2 pieces

Piece 1
Old Black in loom is now Blue Neutral and will connect from loom to "NO"

Green and Yellow Earth will go in the Earth loom point BUT there is no E on the new reciever?.

Old Red now Blue to Com

Piece 2

Neutral Blue is 4 on the loom to N on the reciever

Earth Green and yellow in 3 in the loom (but where on Receiver?) i only have one left its NC ....Normaly Closed

Calling Wire to the Live( 230V feed) on Reciever ...do i run the Live Brown wire from the new 3 core off the loom do i take out the calling wire and attach it to the reciever ( if i dont use the 3 core brown then it will be left unused?)
 
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After more study of the pictures it would appear that you will also need a signal to tell the motorised valve that the central heating is not required, i.e. from NC to terminal 6.
 
EFL That photo is brilliant thank you so much! i have the wires all in thier places so easy with the photo! 2 ends that i have left are the top right Earths what is it those are attached to? as theres no earth in the Plastic wall box that the Thermo sits in like you may find in a wall socket.
Thanks again :)
 
aha i did wonder by the to circles, so they are not connected earthed to anything as i have a spare earth strap that i could attach to the pipe if necessary.

But i do have the plastic little blacks so im good to go
Thanks :)
 
Hi EFL
I have done as you advised in the last graph, I'm just checking back in before I test it, as its rely packed out in the Wire loom?
I've only removed the old Wall Thermo wire Black and Red at the bottom right corner.

There was no other to remove? is that right.

If so I'm now thinking pick up a better quality loom as its bursting at the seems and I'm not moving out of Back Boiler Status anytime soon.

Just want to ask one last thing if I may? Screwing this to the wall is going to be a bind due to drill width and cupboard width, is their any legislation against it being on a wooden board backing?

Thanks again you've cleared up so many questions.
 
oddjob1 said:
There was no other to remove? is that right.
Click to expand...
That's correct.

If so I'm now thinking pick up a better quality loom as its bursting at the seems and I'm not moving out of Back Boiler Status anytime soon.
Click to expand...
Probably would b e better to start again but one thing at a time.
You can get pre-marked ones but you have to wire it for your system.
HERE

Just want to ask one last thing if I may? Screwing this to the wall is going to be a bind due to drill width and cupboard width, is their any legislation against it being on a wooden board backing?
Click to expand...
No, that will be fine.
 
Wow mine rely is old its just a row of blocks.
Thanks again will report back later or tomorrow if I trip the lot :s
 
Hi EFL
I've tried it and the wireless caller picks up the wireless control centre fine but when it kicks in it sounds like a switch clicking on and off ( I think i've heard one before may be a relay??)

Its going a kind of tick tock tick tock,.
The red light stays on so the control centre is fired up ok, but interestingly when this is going on the green light that would show its active and calling doesn't come on. It stays in the standby red status.

I have the old control unit on NO for hotwater and No for CH
(Please ignore the Hotwater on the CH system, I never use it and don't mind if its no longer available if illimination helps the situation)
Thanks :)
 
D

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