How many watts does my heat pump use?
I couldn't find this information on the unit or online. It is a Trane 3 Ton split heat pump, outdoor section model # 4TWX4036A1000AB, Indoor section model# 4TEE3F37A1000AA.
I would like to know how many watts are used with just the heat pump running and with heat pump and emergency heat.
Thanks for the help.
The watts the HP uses will vary as the OD temp varies.
The colder it is, the less watts it uses, it also provides less heat.
You need to know the KW rating of your aux heat to know how many watts it uses.
Where can I find the rating for my aux heat? Is is not the same for all of the model # I listed?
Originally Posted by beenthere
Is the a graph somewhere of the HP power usage?
The same size air handler can have different size strip heater packages.
Contact the installing contractor, he should have the spec guide for the unit.
The heat strip size should be marked on the exterior of the Air Handler.
It is located on the data plate with model/serial. Below model/serial are several boxes and 1 should be checked or filled in to indicate what size heater is in the unit. Some people write in on the outside of the cabinet with marker to make it easier on the techs that come out.
then, like said before, volt x amps = watts.
example.... 10KW heater rated at 60 amps at 240 volts....
60 x 240 = 14,400 watts.
That is not exact nor will it be with your unit. Because the amps won't be exactly 60 and the voltage won't be exactly 240. Have a service tech take the measurements for you at your next routine service. Then you can do the math on your time.
Actually volts x amps = VA
Originally Posted by air2spare
volts x amps x PF = watts
Compressors are not unity PF so there is some difference (watts will be lower than VA by 10-15%.
That is a 3 ton heat pump.
Originally Posted by adama
I can give you figures for my 3-ton Goodman heat pump so they should be in the ball park. The kw's are for the outside unit only.
60F, 2.86 kw
50F, 2.75 kw
40F, 2.64 kw
30F, 2.6 kw
20F, 2.53 kw
10F, 2.41 kw
0F, 2.30 kw
-10F, 2.19 kw
Hope this helps.
The easiest and most accurate way to find out is to turn everything off except the heat pump system and check your electric meter. First with no electric backup, and then with it.
2.85 kW average for 4TWX4036
Originally Posted by adama
8 kW or 10 kW may be typical auxiliary heat on a 3-ton for Southern U.S. 10 to 15 kW for Northern U.S.
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14 SEER = 14,000 btu/ kwh
36,000btu = 2.57kw
Wrong (sorry). So a 14 SEER only produces 14,000 btu/hour? That would be a little more than 1 ton.
Originally Posted by capecool
SEER = EER (at 82F) x fudge factor, for a fixed speed air handler.
For a v-s air handler, the calc is much more complicated.
Gary - I think you misread what he said. It was per kilowatt hour.
Originally Posted by gary_g