Never done a s plan. Stuggling

[Mike Blair]

I have never wired an s plan so struggling lol


I have a heatmiser uh4 underfloor heating controlers inhave one on each floor basement ground first n second.

I have a megaflo eco 250 on the first floor

And a boiler on the basement forgot the name i will update

I have no idea how to connect it. Il upload some pictures soon

Any advice in the mean time

 

[Mike Blair]

heres the megaflow connections and hot water valve


basement , ground , first , second all have uh4 heatmisers. at each heatmiser i have a 2 core and earth and a 4 core and earth going to the basement "boiler"

first floor i have an extra cable called emission "4 core and earth" going to the boiler. on the first floor that is where the cilender is "megaflo eco 250" i just dont get the wiring diagram or what gose where

i have taken over someone else job. its been an uter nightmare and stressful and just cant get my head around this. :/

 

[Leesparkykent]

heres the megaflow connections and hot water valve View attachment 32501View attachment 32502View attachment 32500


basement , ground , first , second all have uh4 heatmisers. at each heatmiser i have a 2 core and earth and a 4 core and earth going to the basement "boiler"

first floor i have an extra cable called emission "4 core and earth" going to the boiler. on the first floor that is where the cilender is "megaflo eco 250" i just dont get the wiring diagram or what gose where

i have taken over someone else job. its been an uter nightmare and stressful and just cant get my head around this. :/

Connect the valve to the hot water valve terminal within the wiring centre apart from the brown. connect terminal 1 of the cylinder thermostat to the terminal you have left over where you haven't connected the brown. connect terminal 2 of the cylinder thermostat to the brown of the valve using a leaver wago or the like.

Edit: just looked at your 1st pic and notice it says 3 port? you said you have an S-plan.....An S-plan will have a two port for the hot water not a 3port.

If you have a 3port due to it being unvented you will also have a two port.

what do you have? as I've based the above on you just having a two port.

 

[Mike Blair]

thats the s plan

 

[Leesparkykent]

View attachment 32503thats the s plan

yeah connect it the way I mention in the above post.

 

[Mike Blair]

what about the connections back at the boilet left with a 4 core and earrth and 2 core and eath for every floor " the emersion 4 core and earth from the 1st floor

 

[Leesparkykent]

what about the connections back at the boilet left with a 4 core and earrth and 2 core and eath for every floor " the emersion 4 core and earth from the 1st floor

Where have you connected them within each UH4? Why is the immersion wired in 4 core and earth? The immersion would be used as a back up for if and when the boiler or system component fails. The immersion would usually be wired as a dedicated 16A radial from the CU with a double switch next to the cylinder and 1.5mm butyl between double pole switch and immersion.

 

[Mike Blair]

i have 4 core emersion and a 2 core immersion. even more stressed out now guys..girlfriend of 2 years found out she was cheating on me saturday :/ simply cant focus on anything

also says needs a double pole isollator doesnt have to be a lockoff one or can it just be a switch :c got 5 hours to get my head around it before leaving for london

 

[mattg4321]

Not being nasty Mike, but please get some help on this. You're clearly well out of your depth.

Maybe you're still in touch with your mentor, or somebody local to you on here can help?

 

[Mike Blair]

possibly am mate right now im so over stressed with everything i just cant take anything in. but i dont have a mentor :/

 

[Midwest]

Digging around the forum looking for something to read and found this. Not an expert on heating systems, but a very experienced on life. FORGET her, she's done you a favour, that you've found out now, sooner rather than later. Move on, and put her in the past. Now back to the heating thing, Bump Lee.

 

[Midwest]

Just had a quick read of this thread. Never done Mega flo system, but it is important you get it right. If your determined to do this, without assistance on site (and if Lee is off-line), you could try Megaflo technical.

 

[davesparks]

The mega flow and any similar unvented cylinder must have all of the required overheat and excess pressure protection (both hydraulic and electrical) fitted correctly and working. If it is not correct and it overheats then it will become a big pipe-bomb and explode demolishing the house and scattering shrapnel everywhere.


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[davesparks]

i have 4 core emersion and a 2 core immersion. even more stressed out now guys..girlfriend of 2 years found out she was cheating on me saturday :/ simply cant focus on anything

also says needs a double pole isollator doesnt have to be a lockoff one or can it just be a switch :c got 5 hours to get my head around it before leaving for london

You do not have a four core immersion or a two core immersion.

What you most likely have is a four core cable and two core cable coming from the terminal box of the mega flow. The immersion heater is the electric heater inside the cylinder.




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[Midwest]

The mega flow and any similar unvented cylinder must have all of the required overheat and excess pressure protection (both hydraulic and electrical) fitted correctly and working. If it is not correct and it overheats then it will become a big pipe-bomb and explode demolishing the house and scattering shrapnel everywhere.


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OP has kinda been encouraged its not too difficult thing to do davesparks. Personally I've never done one, although that wouldn't put me off doing one with a bit of research and advice from their technical. I wouldn't be doing it with the added pressure of time scale (as OP seems to be under) and personnel issues. As said, it's not something to get wrong. Time to regroup Mike, no one you can ask for assistance on site?

 

[davesparks]

The thing with central heating systems is that they aren't taught very well if at all at college. Now unless you have a good mentor throughout your apprenticeship, which covers that area of work then how are you meant to learn? Mistakes can cost time and money but can be one of the most influential learning curves.

Ok so I was taught heating controls as part of my apprenticeship so that is how I learned the basics.
However I was not taught stage lighting control systems, generators, anything more than bare basic earth electrode theory, appliance repairs, vehicle wiring, gas regulations, and a multitude of other things , but I have managed to learn all of these things outside of my apprenticeship off my own back via research, reading books, looking at the systems and working them out and asking a million and one questions when I get the opportunity to meet someone who knows the answers.

I didn't learn anything about the plumbing side of boilers during my apprenticeship, I have learned that entirely through looking at it, reading the manuals for boilers when I wire them, watching plumbers whilst I'm waiting for the, to get out of the way and also actively offering to help them out when I'm waiting for them to finish up so that I can test a system.

You don't stop learning when your apprenticeship finishes, it is just the start of a lifelong opportunity to learn.

Yes mistakes are a good learning experience, but don't limit it to your own mistakes, learn from everybody else's mistakes.
For example I learned about the danger of incorrectly draining down a hot water cylinder like the megaflow being discussed here when I witnessed a plumber get it wrong and cause the whole cylinder to implode. I could have just laughed at his misfortune (which I did quite a lot of too) but I also took the time to learn what exactly happened and why, and how to avoid it.


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