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ivanhoew
@ivanhoew
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Eminent Member
Joined: Jan 13, 2025
Last seen: Feb 4, 2026
Profile Activity
Topics: 3 / Replies: 25
AllTopicsReplies
Reply
RE: Best temperature wave form for best economy and efficiency .

Sorry Jonathan I missed this. Happy to start a harnitek thread if you like ?   regards Robert    

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: are there internal electric heaters ?

i agree david , that sounds like a water pump sort of draw. maybe its just that ashp make in the article that does it ..

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: are there internal electric heaters ?

Thanks morgan , i can't find any flat bits in my graphs .. probably because i suspect its about 6x too big , i can see looking at the amps line ,...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
are there internal electric heaters ?
1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 4
Views: 806
Reply
RE: Water pump operation choices on my Harnitek heat pump

ThanksTP , no, no buffer tank, one pump . i log the pwm on my inbuilt harnitek logging SW . RE: "Do you have: the commissionin...

1 year ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: water pump usage

its a harnitek 12V1TBA-250L ashp , PUMPis intgral to the harnitek indoor 250 litre tank cabinet , controlled by the harnitek ecu . pump model is...

1 year ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Topic
Water pump operation choices on my Harnitek heat pump
1 year ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Replies: 4
Views: 1101
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

i have the same problem Clockworks , 12kw ashp cycling every 20 minutes .. so i am following along to see if there's a solution , other than repl...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

    Ah ! thats fascinating James thank you , that fills in the blanks as to why its working like that .     so ! i have...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

still gathering data to help me decide . a few more graphs i have compiled .. Looking at these i can see best cop,so far ,...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump starting current

some better resolution graphs for you S gatorator 🙂

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump starting current

Here’s mine .. That’s the high pressure line over the amps line. regards robert

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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