Breaker Panel Label "F.C.?" What is this?

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Old 10-23-13, 05:07 PM
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Breaker Panel Label "F.C.?" What is this?

I'm trying to decipher what the builder labeled on my breaker panel for slot #31/#33. It is labeled "F.C.4." or "F.C.U." or "F.C.H.", I can't tell. It is a dual-throw 15A+15A circuit breaker.

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What do you think this means?

I'm guessing "Forced Cooling Unit" or "Forced Cooling Handler" because it is opposite from #32/#34 which is my air conditioner condenser? Is it something else?

My house has central air-conditioning, not a heat pump. There is a condenser unit outside, and an air handler in the attic which blows air to the ducts.
 
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Old 10-23-13, 06:53 PM
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I have never seen that abbreviation and have no idea.

However, it does not need to be related to the A/C on the other side of the panel.
 
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Old 10-23-13, 06:58 PM
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Federal Credit Union?

I'm thinking it's related to the Air Conditioner and likely the air handler, because there's no other circuit breaker for the air handler, unless the air handler is on together with another circuit.
 
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Old 10-23-13, 07:13 PM
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In commercial.... FCU stands for fan coil unit.

Most home A/C air handlers run on a two pole 15A breaker.
 
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Old 10-23-13, 07:19 PM
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Is a Fan Coil Unit the same thing as an air handler, when referring to residential?

It is a dual 15A+15A breaker.
 
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Old 10-23-13, 07:25 PM
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Most home A/C air handlers run on a two pole 15A breaker.
Unless the home is heated by a gas furnace and then it usually is a 1 pole 20A breaker.

I'm trying to decipher what the builder labeled on my breaker panel for slot #31/#33. It is labeled "F.C.4." or "F.C.U." or "F.C.H.", I can't tell. It is a dual-throw 15A+15A circuit breaker.
Why don't you either trace the wiring or turn it off and see what stops working?
 
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Old 10-23-13, 07:43 PM
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Yes.....a fan coil unit is an air handler.
 
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Old 10-23-13, 07:45 PM
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Yes.....a fan coil unit is an air handler.
Thanks, I'm sure that's the answer.
 
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Old 10-24-13, 04:01 AM
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Like CJ says, turn the breaker off and turn your thermostat fan to "ON". If it doesn't come on, then it is the air handler breaker.
 
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Old 10-24-13, 04:29 AM
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I agree......Fan Coil Unit.
The electrician that labelled the panel would likely be more experienced with commercial work as that is normally what a blower unit with a heating and/or cooling coil is referred to in that type of work.
AHU is another similar abbreviation or HU for humidifier or VAV for...................
 
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Old 10-24-13, 07:59 PM
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VAV = Variable Air Volume
 
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