Thermostat/Control box help | Plumbing Jobs | The Job-board | Plumbers Forums

  • Welcome to PlumbersTalk.net

    Welcome to Plumbers' Talk | The new domain for UKPF / Plumbers Forums. Login with your existing details they should all work fine. Please checkout the PT Updates Forum

Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

American Visitor?

Hey friend, we're detecting that you're an American visitor and want to thank you for coming to PlumbersTalk.net - Here is a link to the American Plumbing Forum. Though if you post in any other forum from your computer / phone it'll be marked with a little american flag so that other users can help from your neck of the woods. We hope this helps. And thanks once again.

Thermostat/Control box help

Post thread
Post reply

Discuss Thermostat/Control box help in the Plumbing Jobs | The Job-board area at Plumbers Forums

A

Adamh2009

Messages
21
Hi all. I'm trying to fit some smart thermostats but they require a mains connection. I have the wiring in place from the existing set up (battery powered thermostats), but they have no mains voltage going through them. The wiring goes to a Danfoss WC4/B wiring Centre as the central heating is split into 2 zones.
Could anyone from the wiring diagrams and the photo let me know what connections I need to make to get voltage to the thermostats? (files attached)

From what I can make out, terminals 1 and 2 that have the black with brown sleeve wires are from the thermostat wiring. The other wires in there are from the valves for the central heating.

Any help is much appreciated. Thanks in advanced.

IMG_20190405_123108.jpg
 

Attachments

  • Danfoss-Wiring-Centre-Guide.pdf
    132.5 KB · Views: 11
Confused, are you running new wiring from the wiring centre?? Some smart stats only work on their own power transformer so require a wall socket. Think you need to elaborate
 
No, the wiring already exists from the wiring centre. These thermostats don't use a transformer, they take a live input direct to the unit.

When I removed the old thermostats, there was already 4 core wiring to them with the blue (live?) and ground wires terminated in the wall, I checked with a voltmeter and there is no power to these wires, so I'm assuming I can somehow put power down the blue wire to the thermostats.
 
Harvest Fields said:
Replace the old receiver with the new receiver as that should have had mains voltage.
Click to expand...
Sorry, I don't speak the lingo. What's the receiver? The old thermostats were battery powered, in the wall behind them is 4 core cable, 2 of the cores were connected to the old units. The other 2 cores have nothing going through them. I know from looking at the diagrams for this wiring station that I am able to get live to the thermostats, just don't know how to configure it for my system. Obviously the ground is already grounded, but there is a blue wire in the wall that goes to the wiring stations, but I'm not sure what is the correct way to get live to it.
 
Riley said:
So I assume you have a thermostat upstairs and down stairs currently??
Click to expand...
Yes I do. One controls 1 bedroom and the other controls the rest of the house. The central heating is split into 2 zones. I have a black, brown, grey (with blue sheathing) and an earth behind my existing thermostats, which are battery powered. The grey/blue and earth are terminated, but neither have any voltage or current. The other two, I believe, are the signal wires. Would I be right in saying I need to get live to the blue wire for the new thermostats?
 
Adamh2009 said:
Yes I do. One controls 1 bedroom and the other controls the rest of the house. The central heating is split into 2 zones. I have a black, brown, grey (with blue sheathing) and an earth behind my existing thermostats, which are battery powered. The grey/blue and earth are terminated, but neither have any voltage or current. The other two, I believe, are the signal wires. Would I be right in saying I need to get live to the blue wire for the new thermostats?
Click to expand...
If you have wiring attached then they are not battery powered mate.
 
Riley said:
So as asked what do the new thermostats require??
Click to expand...
Some way of routing 240v to them via the wiring box. I am not sure what configuration I need to configure the wiring station to for my system to achieve this. I have 2 heating zones, controlled by their own thermostats and their own danfoss HPA2 valves. The configuration that my wiring station is in, is how the builders have left it and does not match any of the configurations shown in the wiring instructions.
 
Are you competent with wiring?? I think realistically you might need a heating engineer or a confident electrician in as it’s very difficult to work out where power is running to and from without having hands on
 
Riley said:
Are you competent with wiring?? I think realistically you might need a heating engineer or a confident electrician in as it’s very difficult to work out where power is running to and from without having hands on
Click to expand...
Yeah I'm fairly competent. I just don't understand the heating system so I have no idea which diagram I need to follow to achieve what I want. I posted the wiring diagrams along with the original post as a pdf. If anyone is able to point me in the right direction I can sort this.
 
You posted a danfoss wiring guide which doesn’t open. Is that for your existing wiring centre or what is required for the new. we’re really having to drag the info out here
 
Last edited:
Riley said:
You posted a danfoss wiring guide which doesn’t open. Is that for your existing wiring centre of what is required for the new. Sorry we’re really having to drag the info out here
Click to expand...

Sorry. If I knew it didn't open I'd have explained more right, yeah it's a danfoss wiring centre WC4B, going to 2 separate danfoss HPA2 valves, with 2 thermostats which will require mains voltage to them. Just in case you need it the boiler is a Ideal Logic Combi ES35. I believe the wiring station isn't configured correctly, or is only done to the minimum needed for the existing setup as the existing thermostats are only battery powered. The house is a fairly new build and there are short cuts everywhere. I'll try and upload the wiring diagrams again.
 

Attachments

  • Danfoss-Wiring-Centre-Guide.pdf
    132.5 KB · Views: 8
New posts

Similar plumbing topics

J
Pump control to thermostat wiring
ChrisB1982 - It is option 2 that I am...
Replies
8
Views
1K
jbatexning
J
W
Are Vaillant controls worth the investment?
Assume a 25kw boiler with a minimum output of...
Replies
4
Views
942
John.g
J
nmlyons31
Hive Installation help
Brilliant. All up and running. Thanks for...
Replies
2
Views
1K
nmlyons31
nmlyons31
A
  • Question
Wiring UFH system help
I think you meant a 4 core isolator, but you...
Replies
16
Views
2K
alexm1992
A
G
Vaillant Controls - is it possible to mix wired and wireless?
That is true - however with Vaillant...
Replies
4
Views
855
gndurant
G
Back
Top