Wiring an old cylinder stat

[finchy01]

Evening chaps. I had to replace a danfos hsa 3 mid position today as no hot water. Also as part of it I also had to replace the cylinder star. Problem is I have no idea on the wiring on that and it was ancient with no wiring diagrams. There's l,n & pe. I was getting 240 on both l&n when satisfied and 240 on l when calling. I have a honey well to stick in there but wondered if anyone can give me a clue of what wire are needed and to where. Thanks in advance. I can't post pics as apparently they exceed the file size.

 

[lame plumber]

if you replaced the cyl stat, surely you had a wiring diagram to follow

 

[finchy01]

That's my point. I haven't replaced the stat. The cylinder was maxed out on temp as they'd the immersion on. I have switched that off and said call me tomorrow. My college diagnosed it and is away so can't speak to him. As I say, I'm getting power but not sure which wire goes where if I do get a call back an need to change it.

 

[jtsplumbing]

Ring Honeywell tec, tell them what you are removing and what you want to replace it with.

 

[Simon F]

L,N and earth just means you have a 3 core cable.
dont assume the colours mean anything.

Its a mid position so W Plan,
depening on whats happening there will be power on all 3 at some point.
you need to follow a wiring guide so you can see what is happening.
or at least its replace like for like???

 

[kris]

Like said below , colours mean nothing in stats , although earth cable should only be used as earth , by the sounds of it your live is your common and blue / black is your calling , on the honeywell stat = live / into C common and blue into number 1 , last cable into 2
common is wired from timmer and other 2 from zone valve , call for heat , heat satisfied,
If not sure get a qualified spark or engineer

 

[leesparkykent]

look in the wiring centre. If its a Y-plan the new Honeywell cylinder thermostat will connect up common to HW ON terminal on programmer, 1 will connect to the same terminal as the orange of the valve and 2 will connect to the same terminal as the grey of the valve.

 

[Simon F]

L,N and earth just means you have a 3 core cable.
dont assume the colours mean anything.

Its a mid position so W Plan,
depening on whats happening there will be power on all 3 at some point.
you need to follow a wiring guide so you can see what is happening.
or at least its replace like for like???

Y plan quite right, whats happened to the edit tab?

 

[finchy01]

Thanks for all your responses. It did have to be replaced in the end but typically one of our subbies ended up doing it as I wasn't in the area.

 

[ShaunCorbs]

Y plan quite right, whats happened to the edit tab?

If after 30 mins it goes away as you have had more than enough time to edit they say