Electrical Underfloor Wiring.

[jktelectrical]

Hi There,

This is my first post and need a little help.

I am currently on a large barn conversion which has water underfloor heating there are a total of five manifolds serving the under floor heating, I also have one large megaflow which will be deliver the hot water, I also have one swimming pool heater unit and one very large valiant system boiler,

I have a series of pumps and 2 port valves.

The problem I have is that I am worried about a backfeed somewhere in the circuit.

As i have at least 6 switch wires running back and only one boiler control please can someone advise of what my options are, ie Relay wiring.

I am a approved electrician with a bright knowledge of central heating electrical wiring, but being honest this one has thrown me and would like some honest information to see if anyone has been there before and what they did the rectify the problem.

Your help is much appreciated.

Thanks

Justin.

 

[sparks72]

Hi There,

This is my first post and need a little help.

I am currently on a large barn conversion which has water underfloor heating there are a total of five manifolds serving the under floor heating, I also have one large megaflow which will be deliver the hot water, I also have one swimming pool heater unit and one very large valiant system boiler,

I have a series of pumps and 2 port valves.

The problem I have is that I am worried about a backfeed somewhere in the circuit.

As i have at least 6 switch wires running back and only one boiler control please can someone advise of what my options are, ie Relay wiring.

I am a approved electrician with a bright knowledge of central heating electrical wiring, but being honest this one has thrown me and would like some honest information to see if anyone has been there before and what they did the rectify the problem.

Your help is much appreciated.

Thanks

Justin.

A Nu-Heat system by any chance. ?

 

[jktelectrical]

Hi,

The controls for the under floor heating are by heatmiser, All room stats have been wired and all links to the boiler have been installed.

The manifolds have there own control centre.

Hope the above helps.

Thanks

Justin.

 

[sparks72]

Hi,

The controls for the under floor heating are by heatmiser, All room stats have been wired and all links to the boiler have been installed.

The manifolds have there own control centre.

Hope the above helps.

Thanks

Justin.

Hi Justin.

Have we spoken before?
Is the system your looking at in the Chester / Cheshire area ?
If so I can help.

 

[jktelectrical]

Hi there,

We have never spoken before well not on here,

The job is in cheshire and we are at 2nd fix stage normally very good at this type of wiring but this has thrown me,

Just after genuine help..

Thanks

 

[sparks72]

Hi there,

We have never spoken before well not on here,

The job is in cheshire and we are at 2nd fix stage normally very good at this type of wiring but this has thrown me,

Just after genuine help..

Thanks

Ok, I thought we had contacted each other on this forum via PM, I thought you were the new guy who had moved to Chester a few months ago & started up on your own.

I really need to know what make of underfloor heating it is your dealing with, I have experience of Nu-Heat systems.

 

[jktelectrical]

Hi there,

Its not nu heat its heat miser, Just need information on relays as i have 6 switch wires I can not connect them alltogether because of back feeding.

Always lived in crewe and been on my own for 6 years, feels like 20..

Thanks Justin.

 

[sparks72]

Hi there,

Its not nu heat its heat miser, Just need information on relays as i have 6 switch wires I can not connect them alltogether because of back feeding.

Always lived in crewe and been on my own for 6 years, feels like 20..

Thanks Justin.

Justin, from my experience I would give the manafacturer a call tomorrow.
I had similar problems with a Nu-Heat stystem & Daikin backup heater.
Sorry I can't offer further advice as I've never used Heatmiser.

 

[davelerave]

Hi There,

This is my first post and need a little help.

I am currently on a large barn conversion which has water underfloor heating there are a total of five manifolds serving the under floor heating, I also have one large megaflow which will be deliver the hot water, I also have one swimming pool heater unit and one very large valiant system boiler,

I have a series of pumps and 2 port valves.

The problem I have is that I am worried about a backfeed somewhere in the circuit.

As i have at least 6 switch wires running back and only one boiler control please can someone advise of what my options are, ie Relay wiring.

I am a approved electrician with a bright knowledge of central heating electrical wiring, but being honest this one has thrown me and would like some honest information to see if anyone has been there before and what they did the rectify the problem.

Your help is much appreciated.

Thanks

Justin.

are you saying you need to convert your 6 inputs to 1 output without backfeeding?

 

[Deleted member 9648]

I had a similar situation with a heating system and ended up with 4 boiler trigger wires,I fitted 4 relays,each coil energised by one of the boiler on triggers. A separate live was linked through the N/O contacts of the relays and a switch wire to the boiler.

 

[jktelectrical]

Hi there,

Yes I would need to convert the six inputs to one output to the boiler without back feeding, I think I would need a relay but not sure on the connections.

Thanks

Justin

 

[jktelectrical]

Hi There,

Will give them A call to day to ask there advice, Think the advice on here is better.

Thanks

Justin.

 

[jktelectrical]

Hi there,

That is what I need is there any chance of a diagram,

Thanks

Justin.

 

[davelerave]

Hi there,

Yes I would need to convert the six inputs to one output to the boiler without back feeding, I think I would need a relay but not sure on the connections.

Thanks

Justin

a logic strip used for wiring actuators/stats will do that if i follow you correctly

supply + zone inputs will operate it- and you take a switched live or 'call loop' from the changover contact for boiler

EPH Controls - Heater Switches and Heating Controls Suppliers

 

[Deleted member 9648]

Hi there,

Yes I would need to convert the six inputs to one output to the boiler without back feeding, I think I would need a relay but not sure on the connections.

Thanks

Justin

You would need six relays for six boiler on inputs to end up with one boiler on output....I gave the connections in my previous post.
Six boiler on wires to energise the six relay coils.Link a separate live to one side of all six N/O poles of the relays. From the other side of the six N/O poles link a wire and then to the boiler on trigger on the boiler.
Each valve output will energise a relay,which will start the boiler via a separate live through the N/O contacts which will close when the coil energises.
You cant get a backfeed up the wires from the valves as they are only connected to each coil.