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12 tons HVAC = how many HP? #51232 04/25/05 09:48 PM
Joined: Feb 2004
Posts: 41
R
rknikko Offline OP
Member
Do anyone how many HP if there is a 12 tons HVAC? How do we calculate this?

Thanks.

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Re: 12 tons HVAC = how many HP? #51233 04/26/05 05:21 PM
Joined: Sep 2001
Posts: 806
N
NJwirenut Offline
Member
According to:
http://www.onlineconversion.com

,12 ton of refrigeration = 56.5713594 horsepower [electric]

The conversion factor is 1 ton = 4.714 HP

However, if you are sizing feeders, etc., you need to go by the nameplate data on the motors, or other manufacturer's data.

[This message has been edited by NJwirenut (edited 04-26-2005).]

Re: 12 tons HVAC = how many HP? #51234 04/29/05 07:54 PM
Joined: Mar 2005
Posts: 42
N
northstar Offline
Member
Thanks for that site NJ.

Re: 12 tons HVAC = how many HP? #51235 04/29/05 08:18 PM
Joined: Sep 2001
Posts: 806
N
NJwirenut Offline
Member
I keep that one right at the top of my bookmark list. One of the handiest sites on the 'net...

Re: 12 tons HVAC = how many HP? #51236 05/02/05 11:13 PM
Joined: Apr 2005
Posts: 8
I
ironman Offline
New Member
NJ is correct that you must use the ampacity and fuse ratings on the unit's data plate to size the feeder. However, the info from the online conversion table may be misleading in regard to your question. In practical A/C application, 1 ton = 12,000btu = 1h.p. compessor motor. Therefore, a 12 ton A/C would have a 12 h.p.(approx.)compessor or two 6 h.p.compressors.

The term "ton" comes from an early measurement of a system's capacity to reject heat. A one "ton" system would reject enough heat to melt a "ton" of ice in 24 hours.


Bob

Re: 12 tons HVAC = how many HP? #51237 05/03/05 05:26 AM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
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Wood work but can't!
Re: 12 tons HVAC = how many HP? #51238 05/03/05 05:38 AM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
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Wood work but can't!

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