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Posted by Gary on June 2, 2008, 9:27 pm
> 1/4 inch LL?? Is this the second system since the house was built??
The original system was an old GE which probably had 1/4" LL but when this
system was put in I would've thought they ran all new copper. They moved
the condenser to the other side of the house & ran the copper down a
closet from the attic to the crawl space. Anything's possible though, they
could have saved the old copper & reused it.
I'd be curious if you could find any specs on the TXV with that AH coil?
I still can't figure out why it calls for 25 - 30 deg. SH on the condenser
chart.
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Posted by Noon-Air on June 2, 2008, 11:37 pm
>> 1/4 inch LL?? Is this the second system since the house was built??
> The original system was an old GE which probably had 1/4" LL but when this
> system was put in I would've thought they ran all new copper. They moved
> the condenser to the other side of the house & ran the copper down a
> closet from the attic to the crawl space. Anything's possible though, they
> could have saved the old copper & reused it.
> I'd be curious if you could find any specs on the TXV with that AH coil?
> I still can't figure out why it calls for 25 - 30 deg. SH on the condenser
> chart.
no tellin.... I got no idea about the specs on the TXV... I checked the
archives and it doesn't give specifics. The training I recieved on Rheem
systems with Multiflex coils says 10 - 14 degrees SC to ensure a solid
column of liquid refrigerant to the expansion valve.
BTW.. a little more info on that system as its configured(this is what not
having the correct air handler will do)....
12SEER, 10.8EER, COP 3.3, HSPF 6.95...not even close to the advertised 14
SEER.
OTOH, the RPMC-030JAZ (12 SEER)with the RBHK-21 air handler with an
RCHJ-36A1 coil will net
13.8SEER, 11.85EER, COP 3.52, HSPF 7.15. Maybe picking nits, but....
THe RPMC heat pumps with the RBHK air handlers were my premium line for many
years, and I sold a lot of them.
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Posted by Gary on June 3, 2008, 12:07 am
> BTW.. a little more info on that system as its configured(this is what not
> having the correct air handler will do)....
> 12SEER, 10.8EER, COP 3.3, HSPF 6.95...not even close to the advertised 14
> SEER.
That's interesting because the one thing the owner told me was that he
never saw much of a difference in his electric bill going from an old 8 or
so SEER unit to a 14 SEER that he was sold. So given the small lineset
his 12 SEER might even go down to a 10 SEER close to where he started.
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Posted by KJPRO on June 3, 2008, 12:46 am
>> 1/4 inch LL?? Is this the second system since the house was built??
> The original system was an old GE which probably had 1/4" LL
Most older GE's were in fact 1/4 LL
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Posted by Stormin Mormon on June 2, 2008, 10:21 pm
Hmm. Was it Lummox, that did the LL metering device? It's been years, and I
only saw one or two.
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
1/4 inch LL?? Is this the second system since the house was built?? If it
is, was the first system a Lennox?? That 1/4 inch LL will make for a high
SC, and high LLP.
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