S-Plan Central Heating Installation Question

[RayPooley]

But you said above turning the elec off won’t stop the fire

What? No I didn't.
I said turning the power off before using fire extinguishers would be necessary.
Can you think why that might be so? Give it a shot.

 

[ShaunCorbs]

Re read 43-45-47

 

[Murdoch]

@RayPooley

there is no definition of accessible or inaccessible in BS 7671 and this has been the cause of much debate in the industry BUT seemingly the editors don’t agree

madness

 

[RayPooley]

Re read 43-45-47

Re read 43-45-47

Yes. And? Where did I write turning the power off would put out the fire?

 

[ShaunCorbs]

In post 49

 

[RayPooley]

@RayPooley

there is no definition of accessible or inaccessible in BS 7671 and this has been the cause of much debate in the industry BUT seemingly the editors don’t agree

madness

I agree. I have researched it numerous time. But as I said you can't write a regulation for every instance. Sometimes common sense dictates and given the purpose of the isolation switch, to isolate the device in the event of an emergency, common sense tells you not to put it somewhere where you can't access it immediately when you need to or even find it when you need to.

Having said that, there are 40 contributors to the IET Regulations according to my BYB (17th amendment). I can imagine them sitting around a table and asking themselves : Do we really need to tell these guys not to bury safety isolation switches undrrneath counters and behind heavy freezers? Can we not expect them to figure that out for themselves? They're supposed to be imnpressive. Right?

 

[RayPooley]

In post 49

So not in 43-45-47 then. Post 49.
Ok. Nope..

 

[Murdoch]

Having said that, there are 40 contributors to the IET Regulations according to my BYB (17th amendment). I can imagine them sitting around a table and asking themselves : Do we really need to tell these guys not to bury safety isolation switches underneath counters and behind heavy freezers? Can we not expect them to figure that out for themselves? They're supposed to be imnpressive. Right?

Sadly I think there are 2 answers to this:

1. I don't think the committee would accept they ever make mistakes or corrections are required (BS 7671 is littered with them)

2. These so called experts don't think they need to clarify this and this just demonstrates how out of touch they are with the 21st century

 

[RayPooley]

I agree. I have researched it numerous time. But as I said you can't write a regulation for every instance. Sometimes common sense dicates and given the purpose of the isolation switch, to isolate the device in the event of an emergency, common sense tells you not to put it somewhere where you can't access it immediately when you need to or even find it when you need to.

Sadly I think there are 2 answers to this:

1. I don't think the committee would accept they ever make mistakes or corrections are required (BS 7671 is littered with them)

2. These so called experts don't think they need to clarify this and this just demonstrates how out of touch they are with the 21st century

FWIW. Nobody pays me. I have nothing to gain from giving bad or misleading advice.

 

[RayPooley]

I'm back.

Anyway. I gave the spark the spec and did a walk through at the installation.
He's checked it over and he's fine with it. Will do the job in the spring to summer.

But then, I'm sitting watching the TV the other night and a thought popped into my head.

You could actually just fit a switch in the cable that goes from the wiring center to Honeywell Power Head in
the central heating line. Then all you would have to do is switch it off in the summer when you don't want central
heating. I imagine it is normally closed.

All that would cost is the price of a switch.

Any thoughts on that?

Cheers.

 

[exedon2]

Or turn the room stat down?

 

[RayPooley]

Or turn the room stat down?

Yes. But I could just fit a switch to the power head cable too. Right?
The objective is to switch the radiators off an just have the hot water. ie: boiler on.

 

[king of pipes]

Well Ray you've had alot of good advice from the members on here and unfortunately some not so nice criticism, all I will say is always use a fully qualified electrician for the wiring, you are your own man and will do as you please but we only want you your family and friend to be safe.

It is not unusual to fit a 5 way plug to a existing power head cable it saves messing around in the heating junction box which contains many wires that can be very awkward to distinguish what does what it's also safer, a loose cable connection or wrong cable position can cause alot of problems please keep safe . Kop

 

[RayPooley]

Well Ray you've had alot of good advice from the members on here and unfortunately some not so nice criticism, all I will say is always use a fully qualified electrician for the wiring, you are your own man and will do as you please but we only want you your family and friend to be safe.

It is not unusual to fit a 5 way plug to a existing power head cable it saves messing around in the heating junction box which contains many wires that can be very awkward to distinguish what does what it's also safer, a loose cable connection or wrong cable position can cause alot of problems please keep safe . Kop

Thanks for that.

As you can see from my previous comments the job has been passed to a registered electrician who has agreed with the proposed works to be carried out. The cost is going to be about £200 excluding new equipment and will be completed in the summer or late spring.

It just occurred to me after the fact that the main objective of this work is to enable the lady who owns the property
to be able to turn the CH off in the summer and just have the HW on which she ought to be able to do by default but can't
because it has not been set up the way you would normally set up an S-Plan installation. It is functioning as it is but this
inability to select HW only has had an impact on her fuel consumption last summer burning far more oil than she needed
to have done. This work is to remedy that moving forward.

But that objective could be met by simply inserting a switch in the CH zone valve cable to cut the power off when CH
is not required in the summer months and, of course to restore the power at the end of summer when required. That could be done without touching the current control installation. The bypass valve is working ok. I know that because I have checked it.

So I can't think of any reason why this can't be done.

The CH zone valve is the silver one in the picture.

The wiring center is on the right in the other picture. The CH cable is the black one right of center.

I am talking about a surface mounted DP neon switch underneath the wiring center.

Does that sound feasible?


Thanks

 

[exedon2]

Well yes of course its possible but
you can achieve the same result by selecting off on programmer or simply turning down room stat!

 

[RayPooley]

Well yes of course its possible but
you can achieve the same result by selecting off on programmer or simply turning down room stat!

There is no "OFF" on the programmer for the CH. It's either all or nothing.
I wouldn't expect anyone to go through the entire thread but if you look at my origin posting #1 you'll get the gist.

 

[SimonG]

Well yes of course its possible but
you can achieve the same result by selecting off on programmer or simply turning down room stat!

You're wasting your time.

 

[ShaunCorbs]

Closed