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19-01-2019, 10:33 AM #1
Optimum settings for a heat pump over winter.
I have just purchased and installed a second hand heat pump it is 2.8 kw in with a theoretical 15kw output. Its a standard non inverter model.
I wonder if people could advise on the optimum settings for winter operation - I assume all heat pumps have similar parameters?? Do any of these need to change if heating in spring apart from the temperature obviously?
My current settings:-
Temp 8 C
Delta 0.5 (hysteresis) (default 2 C)
Defrost cycle 30Min (default 45Min)
Coil Temp to start defrost -7 C
Coil Temp to stop defrost 13 C
Defrost duration 10 min
Automatic water inlet temp setting - set at 15 C (def 28)??
Target superheat 5 C??
Manual adjustment of electronic expansion valve 35 C ??
The max water temp setting in heating 25 C (def 40)??
?? = haven't a clue !
6000g in ground koi pond
+3000g lily/Anoxic pond attached
29 koi (40 to 65cm)
Bottom drain, Mid water & Skimmer to Drum
JBR boichamber->Blue eco 500 pump ->below surface return.
Blue Eco 240 -> Large MB -> Waterfall -> Planted Anoxic pond (25 baskets)
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19-01-2019, 11:16 AM #2
do you have the instruction manual ?
if we get a pro longed very cold period I have increased defrost duration, and decreased time between defrosting, because once in a while if it gets very cold it will really get frozen up solid, especially if its sucking snow or sleet through.
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19-01-2019, 02:41 PM #3
I have the instructions - They don't explain some of the parameters though and the defaults aren't set up for koi pond heating - more swimming pools I think. I reduced the time between defrosts to 30 min - it was originally at an hour which resulted in the thing trying to turn itself into a snowman.
Do you mind me asking what time interval and duration you use - both generally and in poor conditions?6000g in ground koi pond
+3000g lily/Anoxic pond attached
29 koi (40 to 65cm)
Bottom drain, Mid water & Skimmer to Drum
JBR boichamber->Blue eco 500 pump ->below surface return.
Blue Eco 240 -> Large MB -> Waterfall -> Planted Anoxic pond (25 baskets)
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21-01-2019, 06:59 PM #4
on mine the standard time for thawing out was 8 minutes, and standard time between defrosting cycles is 45 minutes.
Its usually ok tbh on standard settings, Ive only altered it when it stays sub zero for days, I altered defrosting cycles to happen every 30 minutes, 8 minutes actually defrosting has almost always been enough, I did up it to 12 minutes once when it got really clogged up sucking in heavy snow for a few days.
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The Daily pond temp thread
Yep , forecast snow here ! Hoping so more money to be made gritting lol Sent from my SM-S918B...