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BobTSkutter
@bobtskutter
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Estimable Member
Joined: Jan 11, 2025
Last seen: Apr 7, 2025
Profile Activity
Topics: 1 / Replies: 93
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RE: Is My Midea Heat Pump Inherently Defective?

@cathoderay this is great news. I'm pleased we're getting somewhere. There's a noticeable step change in the power output starting with the 18:00 re...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Hello, Sounds like the flow goes through the magnetic filter before it gets to the PEX, so that's good. 22mm and 1.8m3/hr is about 1.3m/s. I thin...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

A brief explanation of reading vendor pump curves. Here's a simple heating system. It's got 3 radiators, each one can be turned on or off separatel...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Something else crossed my mind when I posted on a discussion about the order components should installed. You mentioned you reversed the direction o...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Hello All,I'm conscious I've turned up on the forum and am writing these long posts full of apparent technical detail. I've been troubleshooting heat ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

Hello All, remember your designing a loop transferring liquid water. The pump just moves the liquid round in circles. It makes no difference to syst...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

@cathoderay I'll put something together about pump curves and system curves. But to help you, I suggest the following: Open all the TRVs and locks...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Hello, I can explain all the pump curve information, but it will take a while for me to put some pictures together. For now, lets work on the basis t...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

^Hey, look at that, it worked 🙂 OK, This is a pump curve. The top one shows Head against volumetric flow at different pump speeds. The chart show...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Hello again,I wonder what's going on here? The system seems to have landed at an equilibrium point. LWT = Set_LWT and the compressor has slowed do...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Hello,I'm not very good with using quotes from forum posts, so I'll try to use headings insted.How did I calculate the secondary flow rate?If you igno...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

I found an install manual for an MD16IU-008DW unit. Can you find the value of dT1SH? It might be in "ServiceMan / 3. Heat mode settings" The manu...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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