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HVAC Discussions - Heating, ventilation and air conditioning.
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Posted by JimL on August 23, 2006, 11:04 pm
On 23 Aug 2006 15:06:47 -0700, ebay@spxchrome.com wrote:
>> And a "kink on the weld" of the LL dryer...Unfortunately it
>> wouldn't be the first time a 5/16" or 3/8" filter was pinched down
>> over a ¼" line.
>>
>> This is what happens when they pass out the keys to the vans, to
>> bullshiters who are just knowledgeable enough to get the job ticket
>> signed.
>>
>
>He thought this as well, that or a clogged dryer, either way how else
>would you attach the dryer or you just saying he was a shitty welder?
Get both lines completely replaced. Make sure they use a 3/8 and
7/8, not a 3/4.
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Posted by tech on August 23, 2006, 11:43 pm
> On 23 Aug 2006 15:06:47 -0700, ebay@spxchrome.com wrote:
>
> >> And a "kink on the weld" of the LL dryer...Unfortunately it
> >> wouldn't be the first time a 5/16" or 3/8" filter was pinched down
> >> over a ¼" line.
> >>
> >> This is what happens when they pass out the keys to the vans, to
> >> bullshiters who are just knowledgeable enough to get the job ticket
> >> signed.
> >>
> >
> >He thought this as well, that or a clogged dryer, either way how else
> >would you attach the dryer or you just saying he was a shitty welder?
>
> Get both lines completely replaced. Make sure they use a 3/8 and
> 7/8, not a 3/4.
Depending on manufacture's specifications and installation requirements, a
3/4 suction line may in fact be what's called for by the manufacture.
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Posted by Stormin Mormon on August 24, 2006, 5:44 am
From what I remember, three tons will run on 3/8 - 3/4 if the line set
is fairly short. But, I'd have to go back and look in the book.
However, a 3/8 liquid and 7/8 vapor line should handle the needs of a
three ton system. Up to some length of line, that is.
If you're running off a 1/4 liquid line, it's likely to be starving
the evaporator. High superheat, and possibly high head.
--
Christopher A. Young
You can't shout down a troll.
You have to starve them.
.
>
>He thought this as well, that or a clogged dryer, either way how
else
>would you attach the dryer or you just saying he was a shitty welder?
Get both lines completely replaced. Make sure they use a 3/8 and
7/8, not a 3/4.
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Posted by Murdentech on August 24, 2006, 11:16 am
> From what I remember, three tons will run on 3/8 - 3/4 if the line set
> is fairly short. But, I'd have to go back and look in the book.
>
> However, a 3/8 liquid and 7/8 vapor line should handle the needs of a
> three ton system. Up to some length of line, that is.
>
> If you're running off a 1/4 liquid line, it's likely to be starving
> the evaporator. High superheat, and possibly high head.
>
I don't know why there is any doubt among the group that anything less than
a 3/8 liquid line is most certainly the problem... or at least the primary
issue.
I have yet to see a new system in the past 15 years require anything less
than 3/8 LL... larger for extremely long line runs. As for suction line, if
it's less than 30 feet you should be able to get by with a 3/4 on 13 SEER,
anything else and you will likely need a 7/8 suction line.
Anything over 3 ton on 13 SEER I've seen 7/8 as the minimum required, larger
on extremely long runs.
If it were my system, I would have a new company come out and replace the
liquid line with 3/8, double check the specs to see if 7/8 suction were
needed and if so, also have that replaced... then I would send the bill for
repair to the installing company with demand for payment... perhaps from an
attorney.
Not much doubt left... problem solved... thanks for playing.
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Posted by on August 24, 2006, 11:57 am
> If it were my system, I would have a new company come out and replace the
> liquid line with 3/8, double check the specs to see if 7/8 suction were
> needed and if so, also have that replaced... then I would send the bill for
> repair to the installing company with demand for payment... perhaps from an
> attorney.
>
> Not much doubt left... problem solved... thanks for playing.
That's exactly how it going to play out in about 3 hours. FWIW the
line is right at about 30ft.
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