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SUNandAIR
SUNandAIR
@sunandair
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Honorable Member
Joined: Dec 30, 2022
Last seen: Mar 21, 2026
Profile Activity
Topics: 5 / Replies: 564
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Reply
RE: Ecodan cycling

Hi… Sorry I was out last night and missed your post. Thanks for confirming you have a rad output of 12000 watts. My calculation method appears to w...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan cycling

Thanks for your reply... it’s a good sign you’re getting a COP of 4 and operating an open loop system. So my first sentence asked what is the rated o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan cycling

Whats the dt50 value of all your radiators? Also, when you observed the cycling how much of your rad system where closed eg. Thermostatic controlled? ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Freeze Stat/Defrost setting….Ecodan in freezing conditions

@walkers-heatpump agree. From a practical point of view your comments make sense…. I guess the key is to check the outside pipes are fully insulated r...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

Thanks Derek. Lots of variables to consider. And another reason to try to get the right size heat pump and right size emitter set. Is it also time to ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

Hi Ian, I think you’re mistaking me for the OP...😉 But you’re right the tables produced seem to suit boiler installations rather than the lower fl...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Freeze Stat/Defrost setting….Ecodan in freezing conditions

Hi @Linz We have anti freeze valves on our pipes outside. These are usually factory set to bleed at 3degC. This also means we don’t have glycol in o...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

Correction : LWT40 should read DT17.5 eg: LWT40 = DT17.5 : 17kw X 0.255 = 4.3KWh

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

Thanks Derek. That clarifies a lot. It has been very useful to work out the DT ratings of radiators when operating at the lower flow temperatures of a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

hi @derek-m I’ve been looking at your post and recognise what you’re saying and worked out the emitter output for all 7 rads at LWT 50. Can you conf...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

Great sketch also of the pipework @riponowl @iancalderbank has great knowledge of your brand of HP so I’ll keep my comments to pipes and rads. As ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Low flow rate on Samsung Gen6 12KW heat pump

reposted for information.....

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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