ACT750 Heat Pump - Working Correctly?

MtView

New member
Jul 13, 2021
2
MA
I'm a new above ground pool owner with a newly installed ACT750 heat pump (manufactured in 2020) on a 24' round 48" pool. I'm in MA and we had downpours yesterday with maybe a high ambient temp of 62. I have had the single speed pump and the heat pump running 24*7 set at 82. It is installed with the 30amp max allowed breaker.

The highest water temp hit yesterday was 77 and the highest water temp hit this morning so far is 77. I did the thermometer test. Ambient air temp is 60 with a dense and cool fog and the air coming off the ACT750 fan is at 58. There is good air flow and it is a new unit.

My question - is this normal for a heat pump in these conditions (aka welcome to using a heat pump in New England)? In overcast conditions with a high of about 68 the pool did hit 82. I use a solar shield, but not a solar cover.

Thank you.
 

swamprat69

Well-known member
Mar 30, 2019
590
Las Vegas, NV
As ambient temperature drops, so does the BTU output of the heat pump. At 60 degrees ambient the BTU output of your heat pump is much less than the nameplate rated output and you are also fighting against pool water heat loss due to temperature differential with ambient air. Heating your pool with a heat pump is a slow process and even more so at your stated parameters.
 
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Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,226
NY
My question - is this normal for a heat pump in these conditions (aka welcome to using a heat pump in New England)?
I had very similar results just south of you in NY. They claim to work well down into the 60s but I noticed production fall off a cliff at 70. My 35k gallons to the 120k BTUs did not help one bit.

Many times it was ‘working’ but the water temps were either plateaued or dropping faster than I could heat the pool.
 
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Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,226
NY
Do you have a solar cover ? We all agree that they work awesome to their ability to stop most of the overnight evaporation that takes your heat with it. The further north you get, the cooler those nights are.

*. We also all agree that solar covers are a PITA. :ROFLMAO:
But a necessary one when heating.
 
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MtView

New member
Jul 13, 2021
2
MA
Do you have a solar cover ? We all agree that they work awesome to their ability to stop most of the overnight evaporation that takes your heat with it. The further north you get, the cooler those nights are.

*. We also all agree that solar covers are a PITA. :ROFLMAO:
But a necessary one when heating.

Solar covers really do sound like a PITA, but it sounds like when you start heating you need one to do it right. I'll look into getting one for next season.
 
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