outside condenser: which pipes get insulated


O

Ojas

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?
 
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F

ftwhd

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?
Its optional dont worry about it.
And what purpose does the insulation play in the AC system's operation?
Its fattens our wallets.
 
R

r.bartlett

Ken said:
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
 
O

Ojas

The big pipe is marked outflow: from the house to the unit.

The little pipe is marked inflow: from the unit to the house.

And so the heated gas is sent to the outside unit using the big pipe
(3/4" diameter copper). The outside unit removes the heat. And then
what is sent into the house should be a liquid, which is why the pipe
is smaller.

Is that correct?
 
F

ftwhd

The big pipe is marked outflow: from the house to the unit.
It has to be mismarked. Thats what brings the cold air in, not out.
The little pipe is marked inflow: from the unit to the house.
Is this a heat pump?
And so the heated gas is sent to the outside unit using the big pipe
(3/4" diameter copper). The outside unit removes the heat. And then
what is sent into the house should be a liquid, which is why the pipe
is smaller.

Is that correct?
You have it backwards. Unless its a heat pump.
 
F

ftwhd

With furnaces, we use the term "supply" and "return". So, the one pipe
supplies the evaporator (outflow, our out from the unit) and the other one
returns the refrigerant to the compressor. So, I think they are labelled
backwards.
So says stormy the hvac retard.
 
K

kool

ftwhd said:
It has to be mismarked. Thats what brings the cold air in, not out.
Is this a heat pump?


You have it backwards. Unless its a heat pump.
Seems right to me.Suction line takes the heat out in the cold refrigerant.
 
G

Guest

Stormin Mormon (on backup computer) said:
With furnaces, we use the term "supply" and "return". So, the one pipe
supplies the evaporator (outflow, our out from the unit) and the other one
returns the refrigerant to the compressor. So, I think they are labelled
backwards.

The only things that's backwards is your logic.
 
G

Guest

Stormin Mormon (on backup computer) said:
The inflow gets insulated.

Helps keep the system from picking up unwanted heat. Reduces water
condensaton on suction line.

He said the little pipe was labeled inflow, RETARD!!!
 
K

kool

Noon-Air said:
Think about it.Warm little pipe brings in the potential "cool" as a sub
cooled liquid , heat is picked up in the boiling evaporator and the "suction
line takesthe heat out in the cold superheated refrigerant" to the condenser
to be rejected outdoors. It's no wonder why we get the big bucks, we have to
think backwards.
 
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F

ftwhd

He said the little pipe was labeled inflow, RETARD!!!
Fat pipe skinny pipe crack pipe
inflow outflow counterflow
not carpeted counter tops not linoleum back stops
hot pipe cold pipe mormons on the crack pipe

suction line discharge line liquid line
phase change times change loose change
mormons picking at door locks
bothering mrs gray
hot pipe cold pipe mormons on the crack pipe...
 
G

Guest

kool said:
I'm sure you learned to "think backwards" many years ago. (-;

Does being born feet first qualify one to be a master HVAC technician? :)
 
M

Mr.Tony to you

Hi Ojas
You have lot different answers some are correct but the way are
put you really can tell if are jokers or serious answers,
first your lager pipe/tubing is suction to compressor
which is ideal to be insulated because you don't want
water drips from sweating on the line and on the long runs it
also saves some energy which makes unit little more efficient
but not much that you will be able to see or measure.
The smaller line is your liquid line which carries liquid to
your cooling coil inside your house (remember cooling takes
place when liquid expand from liquid form in to gas)in any
case this line does not need to be insulated unless again
line is long and exposed to sun or is going through area
where temperature is higher then outside the location of
condenser, so in 99% of installations you will not see this
small line insulated but yes if you whish it will not hurt
the system if it is insulated but you may benefit some
as I said it all depend on your setup and location.
Tony
www.cas-environ.com
 
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G

Guest

Mr.Tony to you said:
Hi Ojas
You have lot different answers some are correct but the way are
put you really can tell if are jokers or serious answers,
first your lager pipe/tubing is suction to compressor
which is ideal to be insulated because you don't want
water drips from sweating on the line and on the long runs it
also saves some energy which makes unit little more efficient
but not much that you will be able to see or measure.

Damn, I thought it had something to do with superheat...
 

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