Gravity fed system wiring fault???

[stanna]

Afternoon Plumber gurus.

Have a rented property which has a gravity fed system in it. Been asked by tenant to sort a few problems with heating. 1. bleed a radiator (give me strength) the other is she cant have hot water without the heating on. (had house a year)
I thought this would be a MZV problem so ripped up laminate flooing and floor to get too it and it seems fine. now realised if it was that it would be other way round ie hot water no heating as valve operates when both selected.

Whilst fereting round the MZV i noticed when only hot water is selected the pump does not run. This is confirmed as fault as when switcing on for HW only the boiler runs for a couple of mins then shuts off. So it appears to be heating whats in the boiler then shut down as its not being pumped once reaching right temp.

I remember when doing kitchen the programmer came adrift when being rewired and sparks said he would sort it.

Does it sound like fault at progger end or control unit?

Hope you can help

Stanna

 

[stanna]

Quick update

Ive had progger off and been messing with wires.
Its a danfoss 102e5. If memory serves sparks was messing round with the 3 wires that go to terminals 1 and 2 and kept changing them.
All 3 are flex rather than 1.5 t&e.
Im assuming they are room stat, cylinder stat and 1 for the zone valve.
What should be correct connection once ive identified which is which.

Thanks

 

[melmos]

Look at this link http://www.heatingcontrolsonline.co.uk/instructions/102e5.pdf

 

[stanna]

Thanks ive got that

Ive looked at various wiring diagrams and believe i have a C plan wiring layout given 2 port valve. Problem is that no diagram shows having 3 lives going to the 2 connections on progger. I guess this was a short cut but cant work it out.

 

[stani]

Doesn't the words 'gravity system' ring any bells.

 

[mountainman]

Doesn't the words 'gravity system' ring any bells.

Aww!
You've spoiled the fun now. Lol

 

[stanna]

Well thanks for the glib responses clearly an in joke with plumbers.

However i fail to see your point so perhaps you might educate me?

 

[SimonJohns]

Well thanks for the glib responses clearly an in joke with plumbers.

However i fail to see your point so perhaps you might educate me?

1st lesson

We are not a free technical help website

2nd lesson

You've wasted money. Pay a proper plumber to come and fix it.

 

[jefaz]

Well should the pump run when hw only selected on a "gravity system" ???

 

[Mike Jackson]

No, it's wired wrong so you need someone that is competent in wiring heating systems to come and rectify it. Your electrician clearly wasn't and by the sound of it you are struggling. Get a professional in before you waste any more time. This is not something that can be diagnosed over the internet.

 

[stanna]

Ah Jefaz the penny has dropped, oops. Sorry chaps.

The sparks i got was qualified as he gave me all the relevant part P stuff for work he did.
Wiring is as was so the fault remains that when selecting hot water only boiler runs for 2 mins then shuts down.
Looking at diagrams the fault must be within the cylinder stat system ie stat not working or faulty wiring as eveything else seems to work ok.
Would you concur? If this si case i need to remove half tenants possesions to get to cylinder which is not something i want to do if thats not the prob.

 

[stevetheplumber]

first you need to establish what system you have how many pipes come of the boiler?

 

[RoryD]

If it's gravity fed wtf are people talking bout cylinder stats n programmers, Stanna, you must call someone in who knows how to sort our your non return / anti gravity valve or you're just gonna ruin what seems to be an awful day!!

 

[doitmyself]

If it's gravity fed wtf are people talking bout cylinder stats n programmers

But the OP has mentioned taking the floor up to get at the MZV (motorized zone valve); so it could be a gravity HW system updated to a C Plan.

 

[mountainman]

Fourteen posts and still no closer to deciding what type of system is in the property.

I really think that the OP needs to get a heating engineer in to sort it out.
I doubt he will though as he openly admits to being the landlord of the property and advice from this forum could save him a few bob.

 

[RoryD]

Fourteen posts and still no closer to deciding what type of system is in the property.

I really think that the OP needs to get a heating engineer in to sort it out.
I doubt he will though as he openly admits to being the landlord of the property and advice from this forum could save him a few bob.

oh you ol' cynic mountainman!! lol! you're 100% correct though

 

[mountainman]

oh you ol' cynic mountainman!! lol! you're 100% correct though

I am unmasked, I humbly beg your forgiveness.

 

[zeebeedee]

Comes to mind!

 

[mountainman]

View attachment 8020 Comes to mind!

Only when working on the Stirling heat engine, and especially when I'm bored and going fishing