Setting up a Heat Pump - ASHP

I haven’t made any change to the way the circulation pump runs so I assume it runs on demand.

I’ve tried various schedules for running the heating but now just have it targeting a constant indoor temperature 24/7.

Overnight setback - not at the moment. We have a lower tariff for 6 hours overnight and it is of course colder at night. Takes a bit of getting used to but bedroom radiator is sized to keep that room cooler than the rest of the house.

Quiet mode - never tried it.

DHW - I have schedule and reheat. Heated at night during cheap rate and again at midday, when peak solar from our roof. It very occasionally triggers the reheat when tank sensor detects lower than 30 degrees.

That’s useful - thanks ​@juliamc 

I'm actually testing quiet mode overnight and although I’ll need to try in mid winter, this morning was near freezing and it worked well. I think it just adjusts the top end running from what I’ve read so far.

​@jason.lewis ​@sylm_2000 ​@hydrosam if you’re still monitoring here, do you have any comments?

Hi ​@BPLightlog 

still here, just Les so frequently 

my thoughts:

• Circulation pump - on demand or continuous? As far as I am aware ours runs continuously, but I haven’t delved deep to understand this in detail 
• Heating - set a schedule or not? We use our wall stat just as an on off switch with a high temp shut off for those days where sunshine makes the house too warm. We run weather comp with a target of 20°, with high shut off being 22°
• Setback - useful overnight or not? We don’t use this and just let the house cool down between 2100and 0500. I did try set back in early days but found it was waking us up when triggered overnight 
• Quiet Mode - does this affect efficiency? Yes definitely - it murdered efficiency! Tried it this winter but gave up straight away 
• DHW - schedule and reheat or just schedule? We run schedule 1300-1500hrs to take account of warmest part of day and solar PV. Programme allows for reheat if DHW temp drops below 38°, but that rarely happens. At last service DHW temp suggested at 48° rather than 50° which has made a small improvement in efficiency 

hope that helps and feel free to ask further questions.