Cylinder stat and pump wiring

[BroadReach]

Is it a back boiler heating the cylinder?
If so, how do you disperse the heat when the pump is not running? (stop it boiling)

Boydy

On a wood burning system usually either one of the radiators or the feed to the hot water system is installed with no shut off valves. This is usually designed so water will circulate by syphon so even with the pump off, it will not overheat. In addition a pipe stat is often fitted on the outlet to the back boiler to override any controls to ensure the pump runs if it gets too hot.

 

[Scott_boy]

Hi Guys

Need some help on a Shed/Workshop heating system, haven't really done much work on heating systems. Basically there is a wood burning fire, a cylinder and a pump. The way they want this wired is that the cylinder stat does it normal job of when it reaches its temp it brings the pump on, but they also want the pump to have a switch so that they can turn it on when they want too.

If anybody can help with this it would be very much appreciated or even if somebody had a wiring diagram they could forward on would help me out big time.

Thanks

Hi guys. First of all I would like to explain I am an apprentice so I hope I ain't treading on anyone's toes by giving advice as I'm still learning myself!
PICK use this site for my own training and rely on all you guys to offer me free information I need to get me along! In return I feel I really owe you all something back. Correct me if I'm wrong but if I was to wire this system I would do the following....

I would take supply into a fused switch connection unit with 3amp fuse. This would act as a double po isolation for pump or stat maintenance. This switch should always be left on at all times during normal operation. Heres where it gets complicated!! I would then take the neutral from there to the load side of a double pole switch with neon (not supply side - will explain shortly) then take a neutral from the same terminal to the pump. I would then take the live from the fused unit to the supply side of the double pole with neon and a live from the load side to the pump. That would mean the pump would work when the double pole is switched on as that completes the live circuit, and the neutral circuit constantly remains connected no matter what position switch is in.
I would then take feed for the tank stat from the supply side of double pole switch and put the switched return from stat to the load side of double pole along with live to the pump.

Result is that when tank stat calls it puts a live to load side of double pole and as there is a neutral there the neon lights every time the pump runs which gives a good indication!
If however, you want the pump to run without stat calling you can just switch on double pole, neon lights and pump runs!!

Thanks guys.

 

[guest119]

Excellent work Scott.
I would add that the first DP spur should also have a neon to show at all times supply is healthy (spur fuse 3amp), since it is critical to stop boiling (gravity circuit to a hot water cylinder as previous poster suggested would help but that then has the potential to get seriously hot without its own control).
My opinion only........non rcd circuit for this.
Also possible is to do the whole thing in a gridswitch multi. IE 2 colour neons, switch and fuse module.

Boydy

 

[HandySparks]

Re: heating system in a shed workshop

If you haven't got anything good to say don't say anything, was always a good saying I thought. Watcha think Handy Sparks?

Just offering a piece of advice on the use of the forum. I'm sure you're capable of ignoring it if you think I'm wrong.

 

[Marvo]

Re: heating system in a shed workshop

Hi Norn Iron,

You have a very similar thread running here so I've closed this one to avoid confusion.

Cheers
Marv.

 

[Sintra]

Threads now merged.

 

[Sintra]

Re: heating system in a shed workshop

Hi Norn Iron,

You have a very similar thread running here so I've closed this one to avoid confusion.

Cheers
Marv.

Sorry Marvo I've just merged them at the same time

 

[Scott_boy]

Excellent work Scott.
I would add that the first DP spur should also have a neon to show at all times supply is healthy (spur fuse 3amp), since it is critical to stop boiling (gravity circuit to a hot water cylinder as previous poster suggested would help but that then has the potential to get seriously hot without its own control).
My opinion only........non rcd circuit for this.
Also possible is to do the whole thing in a gridswitch multi. IE 2 colour neons, switch and fuse module.

Boydy

Dam boydy!!
I thought I covered everything to perfection, well, for an apprentice anyway!! Excellent advice there though! When I read your reply I was like "why did I no think of that" haha!
just shows you, everyday is a school day, thanks very much for further adding to my knowledge boydy!
Maybe one day I will be a spark!