Conversions

[ault1910]

How do you convert A/C tonage to wattage for single phase and 3-phase load calculations?

 

[masterinbama]

There is no direct conversion because of different SEER ratings. But for estimating I use 8 amps per ton single phase and 6 amps per ton 3 phase. These numbers will get you close enough up to 5 tons. But for actual wire sizes I wait for name plate data. I sometimes get the HVAC contractor fax me equipment data on their letterhead to make them responsible.

 

[cadpoint]

check this conversation out
http://forums.mikeholt.com/showthread.php?t=113684&highlight=watts+tons

"Search" is your friend here, why the logical of searchs might not always
meet your needs try varibles or like thymes when searching here, and then theres outside on the I-Net.

I found this by using, "watts to ton"

Hey and Welcome to the Mike Holt Forum!

 

[LarryFine]

But for estimating I use 8 amps per ton single phase and 6 amps per ton 3 phase.

These numbers are meaningless without corresponding voltages, of course.

A kVa/ton would be more useful.

 

[steve066]

We need to be careful about if we are talking electrical "wattage", or heating/cooling wattage.

It is possible to do a mathmatic conversion from tons to watts, but that isn't the same as the electrical input watts (or amps or KVA).

The other thread had a couple of responses that seemed to be refering to heating/cooing wattage.

 

[iwire]

How do you convert A/C tonage to wattage for single phase and 3-phase load calculations?

You can ball park it but in the end you need the info from the unit. There are major differences in efficiency and design.


If I told you a car has a 200 HP motor could you tell me the MPG?