My boiler wiring has not gone to plan!

[HappyHippyDad]

Evening all..

I've got myself into a bit of a pickle with trying to install a hive thermostat.

The house has a combi boiler.
There are 2 zones.. upstairs and downstairs.

In the wiring centre in the boiler there is one 5 core cable going into it.
L, N, E and the other 2 cores go to the terminal block labelled 'Room stat/timer' (see picture).

In that little 2 way terminal block (Room stat/timer), i assumed one would be a permanant live and one would be the switch live.

I have removed the existing grey and black conductors from this block (leaving the L, N and E in placer) and wired in my new 5 core (going to the hive receiver).

All appeared to work fine.

I switch the hive thermostat on, the boiler fires up.
I switch the thermostat off, the boiler stops firing.

However, the radiators are not getting hot.

Does this seem like I have done something silly to some kind of valve (I'm sure I didn't accidentally switch anything off), or is it more likely something to do with removing the existing grey and black conductors from the Room stat/timer terminal?

edit.. I bet removing the grey or black has stopped power getting to the valves? I just didn't see any valves, or any other cables by the combi though. There is just a FCU !

 

[Rockingit]

Think about it: 1 boiler, 2 zones. How can there not be valves involved??

Also, two zones = two stats. One Hive??

 

[Pretty Mouth]

 

[HappyHippyDad]

Think about it: 1 boiler, 2 zones. How can there not be valves involved??

Also, two zones = two stats. One Hive??

I know, I know.
I thought perhaps as it's my first Hive install and I was a bit nervous, that I could just fit it as per you tube clip and all would be well on the hippy front.
I shall return tomorrow, find the actual wiring centre and fit it properly, so it opens both valves (customer is happy for house to be on one zone).
I'm booked on a heating course soon, pity I didn't wait!

 

[Pretty Mouth]

Looks like the above is your setup.

SL from the stat powers the valve.
Valve opens, then acts as a relay, connecting grey and orange together, which completes the circuit A and B.

Sounds like we're by-passing the valve?

 

[HappyHippyDad]

View attachment 119041

I know, I know.
I've drawn that out so many times from John Wards video.
Again, must have been in some hippy daydream where its all peace and love and who cares if there's 2 zones... it'll just work

 

[Jock from the north]

Evening all..

I've got myself into a bit of a pickle with trying to install a hive thermostat.

The house has a combi boiler.
There are 2 zones.. upstairs and downstairs.

In the wiring centre in the boiler there is one 5 core cable going into it.
L, N, E and the other 2 cores go to the terminal block labelled 'Room stat/timer' (see picture).

In that little 2 way terminal block (Room stat/timer), i assumed one would be a permanant live and one would be the switch live.

I have removed the existing grey and black conductors from this block (leaving the L, N and E in placer) and wired in my new 5 core (going to the hive receiver).

All appeared to work fine.

I switch the hive thermostat on, the boiler fires up.
I switch the thermostat off, the boiler stops firing.

However, the radiators are not getting hot.

Does this seem like I have done something silly to some kind of valve (I'm sure I didn't accidentally switch anything off), or is it more likely something to do with removing the existing grey and black conductors from the Room stat/timer terminal?

edit.. I bet removing the grey or black has stopped power getting to the valves? I just didn't see any valves, or any other cables by the combi though. There is just a FCU !

View attachment 119037

Not sure I had a system boiler last week with 3 zone valves ,1 for hot water 2 for heating up and down.to confuse things the hot water had its own programer wired thru cylinder stat as well as 2 danfoss programers for heating 1 up 1 down .I had to fit a duel hive reciever and a combi reciever which was provided by plumber who says this will work but the customer would have to contact hive directly over phone for remote use via mobile phone etc.it works perfectly on the hard ware side but I don't get involved in software side unless it's a basic hive [duel or combi] .I basicly striped the wiring centre right back .there must have been about 50 or more cores crambed in to it .the original boiler was no volt switching so there was no permanent feed to valves .I was stressed to the max with plumbers asking is it ready to fire yet .but it worked first time ,obviously my main concern was making sure tank stat closed hot water valve when tank got hot [I turned stat right down to save time]
Long story short I just used 1 of the room stat terminals in boiler and I guess I picked the right one ,assuming 1 is 240v out and other is sw live in to fire boiler .it sounds like the zone valves are not opening .if there is 2 zones i would think there must be 2 valves and a wiring centre some where with the hive heating on energising the brown of zone valve and micro switch closing firing boiler.

 

[Pretty Mouth]

I know, I know.
I've drawn that out so many times from John Wards video.
Again, must have been in some hippy daydream where its all peace and love and who cares if there's 2 zones... it'll just work

They're almost never wired like that though are they? A load of connector blocks shoved in the back of the fused spur is usually more like it.

Something I found that helps me when struggling to troubleshoot heating systems. Temporarily swapping any electronic programmers, smart thermostats, or any other suspicious gadgetry that may have a mind of its own, with lightswitches. Simple and reliable, you can be confident that they are doing what you tell them to. Once you can make the system work correctly with those you can re-introduce the gadgets one at a time.

 

[HappyHippyDad]

I feel silly and I'm going to bed.

 

[Jock from the north]

They're almost never wired like that though are they? A load of connector blocks shoved in the back of the fused spur is usually more like it.

Something I found that helps me when struggling to troubleshoot heating systems. Temporarily swapping any electronic programmers, smart thermostats, or any other suspicious gadgetry that may have a mind of its own, with lightswitches. Simple and reliable, you can be confident that they are doing what you tell them to. Once you can make the system work correctly with those you can re-introduce the gadgets one at a time.

Duel channel reciever 2 gang light switch .had my Oldman heating on that for about a week till I got round to fitting new clock

They're almost never wired like that though are they? A load of connector blocks shoved in the back of the fused spur is usually more like it.

Something I found that helps me when struggling to troubleshoot heating systems. Temporarily swapping any electronic programmers, smart thermostats, or any other suspicious gadgetry that may have a mind of its own, with lightswitches. Simple and reliable, you can be confident that they are doing what you tell them to. Once you can make the system work correctly with those you can re-introduce the gadgets one at a time.

 

[Jock from the north]

Evening all..

I've got myself into a bit of a pickle with trying to install a hive thermostat.

The house has a combi boiler.
There are 2 zones.. upstairs and downstairs.

In the wiring centre in the boiler there is one 5 core cable going into it.
L, N, E and the other 2 cores go to the terminal block labelled 'Room stat/timer' (see picture).

In that little 2 way terminal block (Room stat/timer), i assumed one would be a permanant live and one would be the switch live.

I have removed the existing grey and black conductors from this block (leaving the L, N and E in placer) and wired in my new 5 core (going to the hive receiver).

All appeared to work fine.

I switch the hive thermostat on, the boiler fires up.
I switch the thermostat off, the boiler stops firing.

However, the radiators are not getting hot.

Does this seem like I have done something silly to some kind of valve (I'm sure I didn't accidentally switch anything off), or is it more likely something to do with removing the existing grey and black conductors from the Room stat/timer terminal?

edit.. I bet removing the grey or black has stopped power getting to the valves? I just didn't see any valves, or any other cables by the combi though. There is just a FCU !

View attachment 119037

I

Evening all..

I've got myself into a bit of a pickle with trying to install a hive thermostat.

The house has a combi boiler.
There are 2 zones.. upstairs and downstairs.

In the wiring centre in the boiler there is one 5 core cable going into it.
L, N, E and the other 2 cores go to the terminal block labelled 'Room stat/timer' (see picture).

In that little 2 way terminal block (Room stat/timer), i assumed one would be a permanant live and one would be the switch live.

I have removed the existing grey and black conductors from this block (leaving the L, N and E in placer) and wired in my new 5 core (going to the hive receiver).

All appeared to work fine.

I switch the hive thermostat on, the boiler fires up.
I switch the thermostat off, the boiler stops firing.

However, the radiators are not getting hot.

Does this seem like I have done something silly to some kind of valve (I'm sure I didn't accidentally switch anything off), or is it more likely something to do with removing the existing grey and black conductors from the Room stat/timer terminal?

edit.. I bet removing the grey or black has stopped power getting to the valves? I just didn't see any valves, or any other cables by the combi though. There is just a FCU !

View attachment 119037

I must add my wiring centre and fcu were remote from boiler

 

[HappyHippyDad]

Been back with the plumber today.
Neither zone valve was open, as you would expect seeing as though I had disconnected the power to them.
@LmarshallSparks saved the day.
Cheers Laurie

 

[LmarshallSparks]

Been back with the plumber today.
Neither zone valve was open, as you would expect seeing as though I had disconnected the power to them.
@LmarshallSparks saved the day.
Cheers Laurie

Always a pleasure!

 

[Mike Johnson]

Been back with the plumber today.
Neither zone valve was open, as you would expect seeing as though I had disconnected the power to them.
@LmarshallSparks saved the day.
Cheers Laurie

How did they save the day, can't see a previous post from them?

 

[LmarshallSparks]

How did they save the day, can't see a previous post from them?

I’ve been fortunate enough to have happy hippy dad as my electrical mentor well retraining as an electrician! We are local to each other! On this occasion he was fortunate as I’m an experienced plumbing and heating engineer!