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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 17, 2025
Profile Activity
Topics: 17 / Replies: 2696
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RE: (How) does your heat pump control its water pump?

Thanks. To me it looks like pump speed follows compressor modulation (which makes some sense if it is trying to maintain roughly a fixed DT across em...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ideal renewables components - opinions please

I dont have a battery, but I have the rest. Here is my setup and brief comments Heat pump Vaillant 7kW, directly connected to radiators. No ...

5 months ago
Forum
Well & Truly Off The Grid
Topic
(How) does your heat pump control its water pump?
5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 11
Views: 547
Topic
Low Loss Headers and Buffer tanks - Your experiences wanted
5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 4
Views: 480
Reply
RE: In the middle of an ASHP installation - a few questions (and issues)

Thanks for the feedback to the forum, as someone who posts fairly frequently its always good to hear how things turn out, whether or I contributed to ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Database of heat pump performance data?

I cant agree more. You need a heat pump that is right sized (unless you have a thick screed and plan to batch heat to exploit ToU tarrifs to the ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Dont worry about this. Long story and discussion but dont worry about it. Understood however you may find it difficult to persuade anyone to do it ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

@eliuccio I was wondering how things are going with the quotes. Following the rather esoteric discussion about water pump modulation I thought it ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Can I just say that this is what I think too, but I was waiting for @gary to answer the questions before being certain about the conclusion. Heat p...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Thanks for the additional information. As I say 2 hours to get up to temperature after a long shut off is not totally surprising (albeit that t...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Looking at the plot it looks like the compressor frequency (yellow line) is zero from about 0L00 to 19:00. Am I misreading? 2 Hours to get up to te...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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