HughF

I was looking at the installation instructions for that very unit just last week, but on the Argo website. Looks like a great system, with their external e-mix tank.

I believe that most of the splits from daikin with an internal ‘hydraulic/cylinder’ module work this way. F-gas lines into the fridge/freezer sized thing.

Monobloc (no space indoors for an indoor unit, although I would have gone split if I had the space), using hi-line eFlex 2x32mm from Ingoodnic. Ingoodnic are marginally cheaper than LoCO2 heat which was the other supplier I got quotes from. If you’re buying this stuff you want to use the product with bonded in place PU/PIR insulation, not the stuff that is unbonded. The latter will cause issues with the hot pipe expanding along the length and causing havoc with your end terminations.

Vrf/vrv systems are 2 pipe, using what are called ‘refnets’ (branches) to supply liquid and vapour to the indoor units. Just like a flow/return pair. If you want heat recovery then it becomes a 3 pipe system and the reversing valves are inside the air handlers/indoor units. Suck the heat out of your server room and dump it into your hot water tank, whilst cooling the other rooms…. It’s genius.

It’s almost as if the aircon companies took something that was so genius and simple (air-air, vrf/vrv) then were tasked with making something work by some Europeans who wanted to keep their radiators…. stupid radiator loving people that we are. £2k on pipe and radiators for my install…. £2k that could have gone on another cruise. Ah well, the wife wanted radiators… Although, it does decouple the heat generator from the emitter, and that’s a good thing. Rads and pipework should see out two monobloc units, if you keep on top of the water treatment.

Understood... I have rj11 breakout PCBs for each end which have screw terminals. I could use one CAT6A for the comms, and the other one could easily do the two sensors and the call for heat... That makes good use of a 100m length of cable from TLC-Direct...

Edit: 5 cables, one for the 3 port...

I'll need a cable for the 485/carel network, I'll use cat6 ftp for that (thanks for the recommendation), a cable for the call-for-heat jumper (I can use SY/YY for that) and one cable each for the dhw tank sensor and buffer/flow/return temp sensor. 4 cables... EDIT: Temp sensors are 2 wire... so a 100m roll of 2 core screened, and a roll of cat6 ftp...

I'll ask my mate... daikin specifying m&e project manager on the embassy gig...

Isn't that the truth... Commercial aircon installers seem to be much more capable...

Not for r290 you don't... but you knew that... And yes, there are no r290 multi-splits on the market, I knew that...

ASHP is going 20m up the garden, total cable run from controller (Carel, I think it's on rs485) to unit is probably more like 30m. I need a suitable cable for running this back to the unit. Ideally I'd use the same cable to extend the flow/return temp sensor, and the DHW tank sensor. Planning direct burial of the swa for power, then the comms cables into some 50mm ducting. I don't really want to use cat5, although I do have outdoor rated stuff, I'd prefer something stranded, with slightly larger csa. Does anyone have a link to something half decent from Belden (or other) that I can get from RS/Farnell/Mouser/Digikey?

Exactly, it’s 100 times easier. And it always works…. None of this ‘no circulation to the last radiator on the circuit’ rubbish….

Interesting, having worked on both types of systems (I class myself as skilled in all things mechanical/pipework related) , give me 1/4" and 3/8" inch lines, a vac pump and some refrigerant over water any day of the week. It's so much easier to thread around the place. Regarding the hi/low mounting, low for heat, hi for cooling...

Daikin….. from speaking to a good mate who is on the embassy m&e team, doing AC, it’s all they fit. Mitsubishi is also good, but apparently Toshiba/Panasonic/Samsung not so much.

We’ve just appointed one for our side extension: ” Our fee to prepare suitable layout plans, elevations and sections of the above brief would be £1000+VAT. This fee includes revisions as required to amend the scheme to a design you are happy to progress to the planning stage with. This fee also allows for submitting the planning application to BANES City Council and liaising with the appointed case officer should concerns be raised. If the LA request additional information, we will update you and propose suitably qualified professionals. The planning fee paid direct to BANES is currently around £250, we would update you on this fee and give instruction on how and when to settle the fee once the application has been submitted. This fee is based on us not carrying out a measured survey and redrawing plans you already have from when the property was fully refurbished. You have confirmed you do not require building regulation compliant drawings, but should these be required let me know and I can prepare a quote.” I was perfectly happy with that figure, which seemed perfectly reasonable for the following scope of work: ” To conclude from our meeting, you are looking to carry out a two storey side extension replacing the outbuildings on a similar foot print as to not upset the neighbours and the local context. You would like to create a two storey extension that would accommodate the new stair accessing first floor from ground floor and delete the existing which would open up the current lobby area and leave room for storage of coats and shoes. The rest of the ground floor extension would facilitate a dining area connected to the kitchen and downstairs shower room for gusts, whilst allowing for all future happenings. To the first floor, you would like to create an open mezzanine/landing space which would act as a library/crafts area. Windows would be strategically positioned to make the most of the views, and possibly a corner glazed window should this be appropriate.”

£1200 worth of stelrad to be delivered on Monday... I'll let you know what they're like when they show up!

I think Szymon from Urban Plumbers would cover your way. He'll get this working properly...

Mine is terminating just to the right hand side of the front door, I'll transition to copper there, then box it all in where it needs to come through the front wall. No need to bring it through a floor slab in my install, luckily.

Delivered to site yesterday, as promised. Nick from Ingoodnic was super helpful. Recommended supplier 👍

No experience of or comments on the roof, but that's an interesting build...

The roof in question...

We did not have to bag/wrap our asbestos as it went into the skip, that saved a ton of work. Well worth asking for a covered skip to save you all the work.

LiFePO4 will Coldgate in UK winters without battery preconditioning. Model 3 SR+ with the new LFP pack has a pretty aggressive battery heating strategy, lots of videos and tests run by Bjorn Nyland showing this. It’s a great chemistry, but it does need almost as much thermal management as NCA/NCM.

I’ll discuss with the landlord…