Heat Pumps: anyone have one/thought about it?

Octopus just finished my 4 day install and everything working a treat. The unit is so quiet and the house is slowly heating up to 21c. Now to sort out the schedules and putting the house back together.

So recommend after watching the guys in my house.
 
Viberious said:
Octopus just finished my 4 day install and everything working a treat. The unit is so quiet and the house is slowly heating up to 21c. Now to sort out the schedules and putting the house back together.

So recommend after watching the guys in my house.
Click to expand...

May I ask why did it take 4 days? How many hours per day and how many people?

What exactly was done? :)
 
Yeah, interested what is meant by "putting the house back together"; e.g. invasive levels etc with re-piping / carpets / floorboards / plastering / boxing etc?

I am toying with the idea but with the current setup being a combi in the loft, I dread to think of the unpheavel necessary to switch.
 
TNA said:
May I ask why did it take 4 days? How many hours per day and how many people?

What exactly was done? :)
Click to expand...
Ours took 4 days (was meant to be 5 but got condensed to 4 due to an issue with scaffolding not turning up - they didn’t want to start if they couldn’t finish).

There were up to 5 people on site at a time, 3 plumbers and 2 electricians. 2 of the plumbers were relatively inexperienced and one was experienced.

The electricians were there part of the time, the plumbers are there full time, one day they were there until 7pm due to the condensed timetable.

I didn’t have an existing cylinder or a pressure relief overflow as my system was vented. Other than the cold supply, hot out, flow and return locations being already in place, they had a bit of a blank canvas.

Essentially the jobs for the plumbers were:
Decommissioning existing boiler and removing it and any existing cylinder.
Swapping X radiators for larger ones (8 in my case).
Running new 28mm flow and return from the heat pump up the side of the house, through the loft and down into the airing cupboard - in my case it’s a good 15m each for the flow and return.
Install a new pressure relief and D20 pump for pressure relief over slow (through the loft and out the side of the house).
Install new cylinder, expansion vessel, 3port valve and associated pipework.
Install a volumiser on the heating return
Install a magnetic filter after the heating and hot water returns merge.
Build a gravel soak away and base for the heat pump.
Install the heat pump itself on to anti vibration blocks(at least a 2 man lift to do it safely - 88kg).
Commission heat pump
Balance the radiators


Electricians had to:
Install a new power supply for the heat pump.
Install new supply for the immersion
Install wiring for the controls back to the heat pump
Install in the controls themselves
Install the external temperature sensor
Install the wired thermostat.

It’s A LOT of work.

Edit: at some point in the install someone from the local gas network turned up and capped the gas and removed the meter.
 
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My install date is Tuesday 22nd April. Annoyingly not the Monday as it's Easter that week. I'll be there for the first 3 days of it and the other half on the Friday if it runs over, so I'm hoping its closer to the 3 days of the 3-5 days they predict.

My main concern is the electrics. The CT clamp from the inverter is in the indoor main consumer unit and they want to put another mini-consumer unit outside for the heat pump. I need them to relocate the CT clamp before that so the inverter can see the load. The Octopus electrician who fitted my EV charger already put the CT clamp for the Zappi on the wrong way around, so I want to be there to make sure they don't mess anything up.
 
They may not move it unless it’s an octopus solar installation, particularly given it’s inside a consumer unit they don’t need to touch and it’s a solar installation they are not responsible for. That may be up to you to move.

Luckily it’s a dead easy thing to do.
 
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TNA said:
May I ask why did it take 4 days? How many hours per day and how many people?

What exactly was done? :)
Click to expand...
It was a daikin unit, 200l water cylinder and 9 radiators install with large cylinder removal and gas boiler. They had missed the first date which was supposed to start on Monday but they turned up Tuesday and was here at 8 everyday till around 4pm. The largest number of guys onsite was 7 mainly because of the missing Mondays original install date. To be fair the job was flawless and they finished today around 3pm. The house is nice and toasty and the unit is super quiet, every room was cleaned by the team.

Just waiting on Eon to remove the meter, as octopus did our install.
 
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