Split Air con

Ive been looking at various spilt unit Dakin system which seem fairly reasonable to be fitted. In terms of the electrical side, do you run a seperate feed for these of the consumer unit or are you running them off one of the rings or radials in the house? As the reason I ask is I am having the consumer unit upgraded at the moment i'll leave a spare way if that's the main way people have been doing it. Also if you have run a new feed, have you used a RCD or RCBO to protect the circuit?
 
Separate feed with isolator switch near the compressor is recommended, I didn't though, ran mine off an external plug that was already there.

So far no issue, worst case it will trip my fuse box and I'd then look at a separate feed instead if necessary.

In your shoes I'd just account for it as you're changing it over anyway.
 
RSR said:
Ive been looking at various spilt unit Dakin system which seem fairly reasonable to be fitted. In terms of the electrical side, do you run a seperate feed for these of the consumer unit or are you running them off one of the rings or radials in the house? As the reason I ask is I am having the consumer unit upgraded at the moment i'll leave a spare way if that's the main way people have been doing it. Also if you have run a new feed, have you used a RCD or RCBO to protect the circuit?
Click to expand...

Are you upgrading to full AFDD or RCBO? If so it’s probably worth while just sticking it on a separate circuit seen as it can be done there and then. The person doing it could run a supply in for you while he/she is there - or work out if there is a feasible way to get the cable from A - B.

My 3 are all on separate RCBO, one of which is a 32amp supply.
 
Reuben klang said:
Are you upgrading to full AFDD or RCBO? If so it’s probably worth while just sticking it on a separate circuit seen as it can be done there and then. The person doing it could run a supply in for you while he/she is there - or work out if there is a feasible way to get the cable from A - B.

My 3 are all on separate RCBO, one of which is a 32amp supply.
Click to expand...
That's good to know, as I was going to run a 32/40amp feed out to where I’d like the unit. It's a MK RCBO board, running the cable there is easy enough as it will go up and over via the loft.

I’ve got a few more places to email for quotes and getting the consumer unit updated before going ahead with the install.
 
Question for you all, my condensate pump is in the loft for my ducted unit and since the hot spell I've noticed it making a significant amount of noise albeit it's only for 30 seconds maybe a couple of times a day when it fills up, should these be near on silent? I'm wondering if i've knocked it or it's generated a fault, or anything I can do to try to stop it being so noisy?
 
Hello,
I have decided to have the wall mounted air con for two of the rooms in the house.
Then in a year or two if I am happy with the air con and can afford to have more internal units to put in other rooms...
1.
Some engineers recommend to have a single external unit per internal and some recommend one multi spliter for both internal units.
What do you think?
2.
Is it best to connect the air con unit to the mains fuse box or the wall power socket?

Thankyou
 

Split Air con

Anybody have a split air con setup? I'm wondering if I could get away with a unit installed on the wall in red (external wall). The green is the "landing upstairs" If we assume all the upstairs doors are always open, and the main source of summer heat is actually that red wall (their is a huge...
forums.overclockers.co.uk forums.overclockers.co.uk
 
teenwolf said:
UK air con really ?
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I've seriously considered adding air con, either a portable or wall mounted, into my home office in a loft conversion but have so far haven't quite hit the breaking point. If we get more summers like this year then I will be getting it for my office if nothing else, hitting 35c+ is not nice and isn't healthy to try and work in that.
 
arkiboys said:
Hello,
I have decided to have the wall mounted air con for two of the rooms in the house.
Then in a year or two if I am happy with the air con and can afford to have more internal units to put in other rooms...
1.
Some engineers recommend to have a single external unit per internal and some recommend one multi spliter for both internal units.
What do you think?
2.
Is it best to connect the air con unit to the mains fuse box or the wall power socket?

Thankyou
Click to expand...

I have split air con (wall units).

I have a single 4kw (iirc) external unit connected to 2 (lounge and bedroom, never need both on at the same time) and a 3rd unit (bedroom) on a single outdoor unit. All works perfectly. I think the internal unit are 2.5kw which are ample for a 2500sqft house.

Both external units are on our “garden circuit” via external sockets if that makes sense, i.e. they feed into the garden isolation switch (? sorry not a sparky) on our Consumer Unit.
 
I've read through much of this thread to gain an idea on whether the quotes I've received are on par or out of kilter, and it seems my are on the side of wacko, even for premium units.

I've settled on going down the Mitsubishi route. I've contacted 2 of the very few air conditioning companies within 30 miles of me that install domestic systems and which get decent reviews or otherwise don't have red flags, and who also happen to be on the registered books for Mitsubishi (though that's not necessarily a must for me). All units gravity fed.

First quote
3 x 2.5kw APs to lounge, bedroom and loft room
24kw 4-connector Mitsubishi outdoor unit
Trunking etc but self-arrange power supply
£5.6k

This company gets decent reviews but the quote experience and result seemed very slap dash, with the units sized without any real consideration of requirements in terms of room size and aesthetics; and the fact that they didn't have the bandwidth to undertake the power supply installation was an eye opener. When I went back to them to ask what the cost of upgrading to LNs would be they then declined to quote further as they were too busy.

Second quote
1 x 3.5kw LN for lounge
1 x 1.85kw LN for bed
1 x 2.5kw Mitsubishi wall unit
23kw 3-connector Mitsubishi outdoor unit
Trunking etc plus install of 4-way power board, outdoor connection
£7.75k

Very full conservation around positioning, size requirements, and needs etc, and received requested follow-up visit to discuss some finer details. The reviews of the company pre and post sales, and installation, are truly excellent, but with a price to pay

But the bottom line is that for these basic set ups, including power supply, you are looking at £6k plus for 3 units. This is actually the price (6.5k) I know someones else paid for 3 2.5k premium Toshiba units.

Any recommendations for installers that would service the Coventry area would be most welcome, as well as any thoughts.
 
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23 or 24kw external unit doesn't sound right, that would exceed the combined internal unit cooling capacity.

I have 3 x Mitsubishi Electric LN25's with 1 x MXZ-3F54VF (5.4kw) external unit, cost for install for was a bit over £4K for those 2-3 years ago. These are the more premium model though so cost more than the basic ones.

I am just running that off an external plug currently, as the actual power consumption is much lower (it's not drawing 5.4KW it's just the cooling capacity) the actual load I don't think exceeds 2KW from the wall.
 
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