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Carrier RT/HP? kool 05-30-2007
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Posted by Kool on May 31, 2007, 12:02 am

>
>>
>>>
>>>> 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.

Ya, I believe that one. Luckily I don't have to change it ,I was just
curious as to how they work. Strange setup but it seems to work well.



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Posted by Tony on May 30, 2007, 10:07 pm

> Can anyone explain the metering device set up in a Carrier 50TJQ 012
> 501GA. About 10 yrs. old.
> (2-3/8" liquid lines ?????????)

how big is this unit estimate 100 ton? suction must be at leas 6"
Tony


,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 Kool on May 30, 2007, 11:51 pm

>
>> Can anyone explain the metering device set up in a Carrier 50TJQ 012
>> 501GA. About 10 yrs. old.
>> (2-3/8" liquid lines ?????????)
>
> how big is this unit estimate 100 ton? suction must be at leas 6"
> Tony
>

No it's only about 10 tons, 2 5 ton circuits,1-3/8" s.l.



Posted by Tony on May 31, 2007, 5:59 pm

>
>>
>>> Can anyone explain the metering device set up in a Carrier 50TJQ 012
>>> 501GA. About 10 yrs. old.
>>> (2-3/8" liquid lines ?????????)
>>
>> how big is this unit estimate 100 ton? suction must be at leas 6"
>> Tony
>>
>
> No it's only about 10 tons, 2 5 ton circuits,1-3/8" s.l.

Purpose of multi circuits to minimize pressures drop in the coil
there are for making the coils (evaporators ) more efficient
in ACs systems and refrigeration systems depends on
tonnage size of system can go 14> circuits.
Also some systems may use these circuits to control capacity
if you are in business and you stay in it you may come across
many crazy setups. good luck.
Tony
www.cas-environ.com



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