Yes we had the defrost timer extended but we have still had to have the immersion heater on as well otherwise the ASHP isn’t able to reach or maintain the flow temperature when the external temperature drops to 2 degrees or below. And below 0 we can watch the flow temperature drop as the external temperature drops almost 1 for 1.
@jamespa there are a couple of parameter menu levels, only accessible if you know the correct access codes to get to them; level 1, level 2 and factory. (which we do)
I can throw up screenshots of each of the pages if you think it would be helpful?
johnd do you also have a plastic container to catch any of the glycol overflow if it ever over pressures?
Is that a plate heat exchanger above the bucket. Can you tell whether it is connected to the DHW or to the space heating between heat pump and emitters?
Did you say you have 2 water pumps?
This post was modified 13 hours ago 2 times by JamesPa
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
@jamespa yes it is a heat exchanger between the glycol loop for the external unit and the DHW and space heating loop.
Apologies we actually have 3 water pumps; 1 for the glycol loop, 1 for the space heating loop and then 1 more for the DHW.
I’ll work through the menus and get the pics for you.
Heat exchanger picture without the polystyrene cover (space heating on the rleft and DHW on the right), pumps also visible on the left, underneath and one slightly hidden on the right;
@davec installer swapped it out on the 28th November.
I don’t know how you feel about coincidences, but we had our 7kw swapped out on also the 28th of November with the 11.
Are you both going to post times as well as dates to see if the removal of one could've dovetailed in with the installation of the other? As coincidences go, that's a corker.
105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs
"Semper in excretia; sumus solum profundum variat"
