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Old 09-29-2008, 09:32 AM   #1
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wiring for air handlers?


Are the air handlers 110 or 220? Or do they vary for size? Thanks.

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Old 09-29-2008, 05:39 PM   #2
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wiring for air handlers?


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Are the air handlers 110 or 220? Or do they vary for size? Thanks.

They can be either or...

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Old 09-29-2008, 07:44 PM   #3
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wiring for air handlers?


most units at that end are 115V with the fan motor/TR being the main load.if you get involved with heat pumps 220V might be used for the resistance heaters as back up heat.
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Old 09-29-2008, 08:18 PM   #4
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wiring for air handlers?


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most units at that end are 115V with the fan motor/TR being the main load.if you get involved with heat pumps 220V might be used for the resistance heaters as back up heat.

Not true at all, I get all types, simple hydro air units at 240 volts, all depends on the manufacture, and thats about it.
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Old 09-29-2008, 08:50 PM   #5
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wiring for air handlers?


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Not true at all, I get all types, simple hydro air units at 240 volts, all depends on the manufacture, and thats about it.
He didn't say all. I would say his statement is accurate. The majority of furnaces, hydronic, and no heat units are going to be 115v. Heat pump units with electric backup heat are going to be 230v. It doesn't depend on the manufacturer; it depends on what type of air handler you order.

Last edited by Malcolm; 09-29-2008 at 08:52 PM.
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Old 09-29-2008, 09:53 PM   #6
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wiring for air handlers?


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I would say his statement is accurate. The majority of furnaces, hydronic, and no heat units are going to be 115v.

And I'll still disagree. We dont use heat pumps up north, but for what its worth I've wired just as many 240v blowers as I have 120v ones, and thats all i'm pointing out.


The OP's question is a simple one, the answer is this, the unit is what it is.

Last edited by chris75; 09-29-2008 at 09:56 PM.
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Old 09-30-2008, 09:55 AM   #7
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wiring for air handlers?


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And I'll still disagree. We dont use heat pumps up north, but for what its worth I've wired just as many 240v blowers as I have 120v ones, and thats all i'm pointing out.


The OP's question is a simple one, the answer is this, the unit is what it is.

That's odd. It must be based on location. In my area, ninety nine percent of furnaces are 115v. One hundred percent of heat pumps are 230v. The only thing that differs is hydronic heat and no heat applications. These are either 115 or 230v (majority 115v). This can be attributed to future needs of the system.

Last edited by Malcolm; 09-30-2008 at 09:58 AM.
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Old 09-30-2008, 06:13 PM   #8
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wiring for air handlers?


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That's odd. It must be based on location. In my area, ninety nine percent of furnaces are 115v. One hundred percent of heat pumps are 230v. The only thing that differs is hydronic heat and no heat applications. These are either 115 or 230v (majority 115v). This can be attributed to future needs of the system.

We're not talking about furnaces, were talking about hydro-air units. At least I think we are? If that helps any. I agree, I've never wired a 240v furnace, but hydro air units (Air Handlers) come in any flavor.
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Old 09-30-2008, 09:33 PM   #9
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wiring for air handlers?


I think every furnace (which includes an air handler, and some sort of heating system) I've ever installed has been 120 volt. These are commonly used in conjunction with a remotely located heat pump, or A/C unit, which is always 208-240 volt.

Air handlers, which have coils (radiators) in them that circulate hot or cold liquids, come in all sizes and voltages. I've connected huge ones that had 300HP motors that operated on 4160 volts, as well as small ones that operated on 120. Some are dual voltage.

The only way to know for sure is to either look at the unit when it arrives, or look at the spec sheet for the unit that was ordered.

Rob

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