
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.


Originally Posted by air2spare
volts X amps = watts
Actually volts x amps = VA
volts x amps x PF = watts
Compressors are not unity PF so there is some difference (watts will be lower than VA by 1015%.
paul

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.

Originally Posted by beenthere
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?
Is the a graph somewhere of the HP power usage?
Thanks

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.

Originally Posted by iraqveteran
example.... 10KW heater rated at 60 amps at 240 volts....
60 x 240 = 14,400 watts.
That would make it a 14.4KW strip heater.
Seen a lot of installs where the installer didn't mark which kit he installed.
Your right it should be marked, but many are not.

Originally Posted by adama
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.
That is a 3 ton heat pump.
I can give you figures for my 3ton 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.
Take care.

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.

Originally Posted by bobb25
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.
And dividing by 240 will give you your approximate amp draw.
Or leave everything on and record the draw, then don't change anything except the heat pump being on or off then subject the draw.
see
Reading electromechanical meters
in
http://en.wikipedia.org/wiki/Electricity_meter

Originally Posted by adama
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.
2.85 kW average for 4TWX4036
8 kW or 10 kW may be typical auxiliary heat on a 3ton for Southern U.S. 10 to 15 kW for Northern U.S.
Designer Dan
It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE
Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Makeup Air Requirements. Know Your Equipment Capabilities

14 SEER = 14,000 btu/ kwh
36,000btu = 2.57kw
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