Filter Drier Flow Direction

[neilsplace]

I'm confused! My outdoor condenser unit (5 ton Gibson)has two lines connecting to it. One is very cold and is lagged. The second is unlagged and warm to the touch. The liquid line filter drier is on this second line with the flow direction showing as away from the outdoor box, towards the house. Surely hot gas comes from the house and is compressed/condensed, while cold condensate goes to the house?
Advice appreciated.
Neil

[ARPA]

Sounds like all is OK with me?
Why ask, is it not working?
And, you kinda have it backwards about the flow of the gas....

[star882]

Originally posted by neilsplace
The second is unlagged and warm to the touch. The liquid line filter drier is on this second line with the flow direction showing as away from the outdoor box, towards the house.
That's correct.

[billva]

nope, it's installed correctly, liquid leaves the condenser and travels to the metering device at the evap coil where a pressure/temperature drop occurs. the air from your home the blows over the "colder" coil and boils the refrigerant into a vapor where it then goes to the compressor which compresses the vapor back to a liquid state. the compression process creates more heat which is then cooled to a lower temp liquid through the condenser.

leaving condenser=high pressure low temp liquid

leaving metering device= low pressure low temp vapor

leaving evap coil= low pressure high temp vapor

leaving compressor= high pressure high temp liquid.

[star882]

Originally posted by billva
leaving metering device= low pressure low temp vapor

...

leaving compressor= high pressure high temp liquid.


The refrigerant is still a liquid when coming out of the metering device (it evaporates in the evaporator). And the compressor discharge is a gas (which condenses in the condenser).

[billva]

Originally posted by star882

Originally posted by billva
leaving metering device= low pressure low temp vapor

...

leaving compressor= high pressure high temp liquid.


The refrigerant is still a liquid when coming out of the metering device (it evaporates in the evaporator). And the compressor discharge is a gas (which condenses in the condenser).

i'm going back to school. you are correct. leaving the metering device however it is approx 75% liquid/25% vapor.

[mark beiser]

Leaving the metering device is liquid at saturated temp + vapor from however much refrigerant had to boil off to cool the liquid down to saturated temp.
If 25% has to boil off to cool the liquid to saturated temp, the system has problems.... ;)

[neilsplace]

Thanks Guys,
I understand (at last) that the filter drier is pointing the correct way. I appreciate all your answers.
Neil

[star882]

Originally posted by billva

Originally posted by star882

Originally posted by billva
leaving metering device= low pressure low temp vapor

...

leaving compressor= high pressure high temp liquid.


The refrigerant is still a liquid when coming out of the metering device (it evaporates in the evaporator). And the compressor discharge is a gas (which condenses in the condenser).

i'm going back to school. you are correct. leaving the metering device however it is approx 75% liquid/25% vapor.
Don't worry, everyone makes mistakes from time to time.
Today, I also pointed out someone else's mistake on another forum. ( http://www.xtremesystems.org/forums/showthread.php?t=103541 )