how to base superheat

Truth be told, you have to take into account the *pressure loss* the extra
line length presents. If there is an increase in the suction line to
overcome line loss, you might be restricting the oil return process.
[Suction return velocity.] Most aren't aware of this excpet Paul... :)

Lenghty suction lines should be avoided, but, if you must know, after the
first 50 feet, you should expect pressure loss. [And capacity loss.] The
best method would be to measure the suction line temperature and pressure at
the evaportor, [using an adaptor on the TXV equilizer tube] then perform the
same process at the outdoor unit [condenser]. You'll discover the pressure
and temperature differences. [In the case of a fixed metereing device -
you are out of luck.] Understand that depending on the route the suction
line takes, there will be some increase in suction temperature as well.

Asking this question means you should seek some additional education from
your local community college or the manufacture of the equipment you sell.

--
Zyp

Posted by U-Hate-Me on August 25, 2007, 7:04 pm

>>>

>>> Does anyone out there know how to base superheat on 150ft+ line set?

>> Superheat is superheat. Length of lineset doesn't change the math.

> Truth be told, you have to take into account the *pressure loss* the extra

> line length presents. If there is an increase in the suction line to

> overcome line loss, you might be restricting the oil return process.

> [Suction return velocity.] Most aren't aware of this excpet Paul... :)

Yes...Paul is my personal hero.

The fact remains, however, that superheat is superheat.

It doesn't give a shit about linesets, desuperheaters, hot gas by-pass feeds
or anything else.

PS- I'm a reprobate

Posted by on August 25, 2007, 6:16 pm

wrote:

>>>>

>>>> Does anyone out there know how to base superheat on 150ft+ line set?

>>>

>>> Superheat is superheat. Length of lineset doesn't change the math.

>> Truth be told, you have to take into account the *pressure loss* the extra

>> line length presents. If there is an increase in the suction line to

>> overcome line loss, you might be restricting the oil return process.

>> [Suction return velocity.] Most aren't aware of this excpet Paul... :)

>Yes...Paul is my personal hero.

>The fact remains, however, that superheat is superheat.

>It doesn't give a shit about linesets, desuperheaters, hot gas by-pass feeds

>or anything else.

>PS- I'm a reprobate

You already covered that in your first line.

--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

Posted by Noon-Air on August 25, 2007, 8:12 pm

> wrote:

>>>>>

>>>>> Does anyone out there know how to base superheat on 150ft+ line set?

>>>>

>>>> Superheat is superheat. Length of lineset doesn't change the math.

>>>

>>> Truth be told, you have to take into account the *pressure loss* the

>>> extra

>>> line length presents. If there is an increase in the suction line to

>>> overcome line loss, you might be restricting the oil return process.

>>> [Suction return velocity.] Most aren't aware of this excpet Paul...

>>> :)

>>Yes...Paul is my personal hero.

>>The fact remains, however, that superheat is superheat.

>>It doesn't give a shit about linesets, desuperheaters, hot gas by-pass

>>feeds

>>or anything else.

>>PS- I'm a reprobate

> You already covered that in your first line.

Was that where he said that you were his personal hero??

Posted by on August 25, 2007, 8:25 pm

wrote:

>> wrote:

>>>

>>>>>>

>>>>>> Does anyone out there know how to base superheat on 150ft+ line set?

>>>>>

>>>>> Superheat is superheat. Length of lineset doesn't change the math.

>>>>

>>>> Truth be told, you have to take into account the *pressure loss* the

>>>> extra

>>>> line length presents. If there is an increase in the suction line to

>>>> overcome line loss, you might be restricting the oil return process.

>>>> [Suction return velocity.] Most aren't aware of this excpet Paul...

>>>> :)

>>>

>>>Yes...Paul is my personal hero.

>>>

>>>The fact remains, however, that superheat is superheat.

>>>

>>>It doesn't give a shit about linesets, desuperheaters, hot gas by-pass

>>>feeds

>>>or anything else.

>>>

>>>PS- I'm a reprobate

>>>

>> You already covered that in your first line.

>Was that where he said that you were his personal hero??

Yep.

--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/

Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/

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