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davidnolan22
@davidnolan22
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Joined: Jan 15, 2025
Last seen: Nov 29, 2025
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Topics: 0 / Replies: 134
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

@sandman1600 if your house is 130m2 and you have a 14kw mitshi machine....... I would be staggered if it wasn't oversized. that's 107w/m2. that's a re...

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

@sandman1600 Hi, this is all tricky. One thing I wold say is to give the house time. When running the heating very low and slow, it can take...

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

@gary yeah, more than that. about 1000-1200w, ive never really seen it go below that. and that's with the compressor bumbling around 30hz,

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

@gary 11.2kw for 260m2 house. its tight on the heat loss at the cold end, but in mild and a bit cold weather, works well

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

@gary i can see a blending valve on the manifold though. Whats that set too? and here is my floor ticking over at 27ish degrees

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

@sandman1600 you've got a 14kw in a 130m2 well insulated house. I think you might be oversized there too. I've an 11.2 KW heat pump in 260m2 average ...

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

@sunandair This is about as good as I can do

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

@sunandair sure, happy to make a sketch. I think I have done one somewhere but I’ll try to do a prettier one. I think my system is working generall...

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

@sunandair my graphs look similar on my ecodan. And when you make it 2 defrost and hour...... you can see how they struggle

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

@jamespa Hi James, on this topic: you've given good advice to me in the past and I'm working through things with my heat pump set up with th...

9 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

@jamespa thanks again. It makes sense. Before the new bigger LLH, I had a 35mm piped distribution header. There was no blending there, only when I put...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

Hi Gary, Yes, I think I’m getting the hang of it and whats gone on this winter. And yes, during the cold snap previously there was not enough en...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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