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outside condenser: which pipes get insulated

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outside condenser: which pipes get insulated Ojas 10-14-2007
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Posted by Ojas on October 14, 2007, 3:46 am
For a central residential AC system, for the two copper pipes going to
the outside condenser unit (outflow/inflow), which copper pipe(s)
should the insulation be placed around?

And what purpose does the insulation play in the AC system's operation?


Posted by Ken on October 14, 2007, 9:23 am
Ojas wrote:
> For a central residential AC system, for the two copper pipes going to
> the outside condenser unit (outflow/inflow), which copper pipe(s)
> should the insulation be placed around?

        The insulation should be placed around the larger copper tube. Its
purpose is to prevent condensation from forming around that tube since
it will be cooler than the surrounding air. If you fail to do so, the
water dripping from it (condensation) might damage wood or plaster in
the vicinity of the tube.
>
> And what purpose does the insulation play in the AC system's operation?
>

Posted by r.bartlett on October 14, 2007, 10:59 am

> Ojas wrote:
>> For a central residential AC system, for the two copper pipes going to
>> the outside condenser unit (outflow/inflow), which copper pipe(s)
>> should the insulation be placed around?
>
> The insulation should be placed around the larger copper tube. Its
> purpose is to prevent condensation from forming around that tube since it
> will be cooler than the surrounding air. If you fail to do so, the water
> dripping from it (condensation) might damage wood or plaster in the
> vicinity of the tube.


Are you sure that's the reason or merely an additional welcome bonus?

Cheers

Richard






Posted by Mo Hoaner on October 14, 2007, 11:13 am

> For a central residential AC system, for the two copper pipes going to
> the outside condenser unit (outflow/inflow), which copper pipe(s)
> should the insulation be placed around?

The form of this sentence is incorrect. In addition, it contains several
factual errors.

Actually, there's usually between 7 and 10 copper pipes between the the air
handler and the outdoor unit. Most of them are used for communications
between these pieces of equipment. Some of them must be insulated, and the
remainder can be insulated.

> And what purpose does the insulation play in the AC system's operation?

Didn't you learn in English that you don't start a sentence with "and"?

Stick to playing with stucco and paint. It's not as likely to cause
permanent damage to you.



Posted by Bubba on October 14, 2007, 1:36 pm

>For a central residential AC system, for the two copper pipes going to
>the outside condenser unit (outflow/inflow), which copper pipe(s)
>should the insulation be placed around?
>
>And what purpose does the insulation play in the AC system's operation?

Usually the smaller line gets insulated with R-38 inside. This keeps
the heat in the pipe so it can be carried outside and not cause any
undue strain on your cooling system inside. Make sure you do NOT
insulate the small line outside.....inside only.
On the outside you need to insulate the big line.
Make sure you give the outside unit a good acid washing and a light
sanding with a #150 grit belt sander to increase heat transfer from
the condenser coil.
Bubba

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