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Subject Author Date
Carrier RT/HP? kool 05-30-2007
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Posted by kool on May 30, 2007, 4:18 pm
Can anyone explain the metering device set up in a Carrier 50TJQ 012 501GA.
About 10 yrs. old.
2-3/8" liquid lines ,one heat one cool, go to 3/4" headers with eight 3/8"
outlets on each of two cicuits. Expansion happens at each of eight inlets to
the indoor coil . Are there orifaces in all 32 branches? I am about to try
Carrier's site for an explanation but no guaranties.



Posted by on May 30, 2007, 4:35 pm

> Can anyone explain the metering device set up in a Carrier 50TJQ 012
501GA.
> About 10 yrs. old.
> 2-3/8" liquid lines ,one heat one cool, go to 3/4" headers with eight 3/8"
> outlets on each of two cicuits. Expansion happens at each of eight inlets
to
> the indoor coil . Are there orifaces in all 32 branches?


Not sure on your particular unit, but Carrier has coils like that.

Sorry, I don't feel like looking it up...



Posted by kool on May 30, 2007, 5:44 pm

>
>> Can anyone explain the metering device set up in a Carrier 50TJQ 012
> 501GA.
>> About 10 yrs. old.
>> 2-3/8" liquid lines ,one heat one cool, go to 3/4" headers with eight
>> 3/8"
>> outlets on each of two cicuits. Expansion happens at each of eight inlets
> to
>> the indoor coil . Are there orifaces in all 32 branches?
>
>
> Not sure on your particular unit, but Carrier has coils like that.
>
> Sorry, I don't feel like looking it up...


http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/48_50-100si.pdf
I guess I learned something new today.



Posted by on May 30, 2007, 6:18 pm

>
> >
> >> Can anyone explain the metering device set up in a Carrier 50TJQ 012
> > 501GA.
> >> About 10 yrs. old.
> >> 2-3/8" liquid lines ,one heat one cool, go to 3/4" headers with eight
> >> 3/8"
> >> outlets on each of two cicuits. Expansion happens at each of eight
inlets
> > to
> >> the indoor coil . Are there orifaces in all 32 branches?
> >
> >
> > Not sure on your particular unit, but Carrier has coils like that.
> >
> > Sorry, I don't feel like looking it up...
>
>
>
http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/48_50-100s
i.pdf
> I guess I learned something new today.


Yep, that's it.



Posted by on May 30, 2007, 8:07 pm

>
>>
>>> Can anyone explain the metering device set up in a Carrier 50TJQ 012
>> 501GA.
>>> About 10 yrs. old.
>>> 2-3/8" liquid lines ,one heat one cool, go to 3/4" headers with eight
>>> 3/8"
>>> outlets on each of two cicuits. Expansion happens at each of eight inlets
>> to
>>> the indoor coil . Are there orifaces in all 32 branches?
>>
>>
>> Not sure on your particular unit, but Carrier has coils like that.
>>
>> Sorry, I don't feel like looking it up...
>
>
>http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/48_50-100si.pdf
>I guess I learned something new today.
>

take it from someone who's already been down that road, it's far
easier to change the dual ckt evap coil than replacing headers.
Headers & all come with a new evap coil........4 welds & you're done.

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