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Should I believe the AC repair man? Big Daddy 07-16-2006
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Posted by PJ ;-) on July 17, 2006, 1:21 am
wrote:

>
>> Noon-Air wrote
>>> The new equipment is not generally compatable with the old... the rules
>>> changed in January. Let me throw another wrench in the works.... R-22
>>> (the
>>> old refrigerent) is being phased out and in only 3 1/2 years, no more
>>> equipment that requires R-22 will be manufactured.
>>> http://www.epa.gov/ozone/title6/phaseout/hcfc.html
>>> As far as the system being gassed up each year, consider that with the
>>> diminishing supply of R-22, you are going to be paying dearly for the
>>> privelage....and its not illegal unless the system holds more than 50
>>> pounds
>>> of refrigerant and it loses 30% of its charge in 12 months. FWIW, *IF*
>>> you
>>> decide to replace the entire system, I would highly recommend a system
>>> that
>>> takes R-410a refrigerant.
>>
>> R22 is a better gas than 410a as its not a blend and is easier to work
>> with. If you get a gas leak with a blend, the correct method of repair
>> is to dump (reclaim) the whole lot a provide a full recharge (R22 can
>> be topped up). You can't tell which component of the blend has leaked
>> more than the other. You can't 'top up' a blend. Personally I'd stick
>> to R22. Its a bloody good gas.
>>
>R-22 is a good gas, but its not going to be around much longer......check
>the link that I posted earlier.

        I could say the same for something I passed earlier, except
there's no link to it.



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Posted by Bob_Loblaw on July 17, 2006, 3:24 pm


>>R-22 is a good gas, but its not going to be around much
>>longer......check the link that I posted earlier.
>
> I could say the same for something I passed earlier, except
> there's no link to it.

Did it eminate from south of YOUR Mason-Dixon line? LOL



--
Respectfully, Bob

Posted by PJ ;-) on July 18, 2006, 2:41 am

Noon-Air wrote:
> > Noon-Air wrote
> >> The new equipment is not generally compatable with the old... the rules
> >> changed in January. Let me throw another wrench in the works.... R-22
> >> (the
> >> old refrigerent) is being phased out and in only 3 1/2 years, no more
> >> equipment that requires R-22 will be manufactured.
> >> http://www.epa.gov/ozone/title6/phaseout/hcfc.html
> >> As far as the system being gassed up each year, consider that with the
> >> diminishing supply of R-22, you are going to be paying dearly for the
> >> privelage....and its not illegal unless the system holds more than 50
> >> pounds
> >> of refrigerant and it loses 30% of its charge in 12 months. FWIW, *IF*
> >> you
> >> decide to replace the entire system, I would highly recommend a system
> >> that
> >> takes R-410a refrigerant.
> >
> > R22 is a better gas than 410a as its not a blend and is easier to work
> > with. If you get a gas leak with a blend, the correct method of repair
> > is to dump (reclaim) the whole lot a provide a full recharge (R22 can
> > be topped up). You can't tell which component of the blend has leaked
> > more than the other. You can't 'top up' a blend. Personally I'd stick
> > to R22. Its a bloody good gas.
> >
> R-22 is a good gas, but its not going to be around much longer......check
> the link that I posted earlier.

I understand the phase out. But based on the phase out speed of R11,
R22 will be around for quite some time. At least its not a blend.


Posted by insideinfo on July 16, 2006, 7:51 pm
Unfortunately, it sounds like this guy is telling you the truth. The
new 13 SEER (seasonal energy effiency ratings) standards that went into
effect at the beggining of 06' have put several other homeowners as
well as large apartment complexes and municipalities in the same
situation. Older systems do not have a TXV or thermostatic expansion
vavle which will keep them from operating properly with newer
equipment. In this case, the best advise would probably be to avoid the
local jack-leg "tech" who may offer to only change out one of the units
to save you money.
Big Daddy wrote:
> We have a HVAC unit for a townhouse. It is 10 years old. We live in
> Virginia. The unit has been slowly leaking freon over the past 2
> years,
> such that we have had to fill up the freon every spring in order for it
>
> to cool properly. This spring, when we had the freon filled, we asked
> the guy to add dye so we could find out where the leak was. Today he
> checked the unit, and said the leak was mostly in the coils of the
> inside unit, and that we would have to replace both the inside unit and
> the
> outside unit (at a cost of $5500) in order to fix the problem.
>
> I asked if we could repair the coils and he said you can't repair
> coils. I asked if we could replace the coils and he said he can't buy
> replacement coils because the efficiency standards have changed. I
> asked if
> we could replace just the inside unit (and not the outside unit because
>
> the outside unit works fine) but he said this wasn't possible because
> then the two units wouldn't be compatible. I asked if we could just
> keep adding freon each year, and he says this is illegal, as it
> violates
> EPA rules about letting ozone-depleting freon into the atmosphere. He
> swears the only solution is complete replacement of the whole system.
>
> Does this sound right to you? Could he be trying to take us for a
> ride? Should I get a second opinion?
>
> If we do have to replace the unit, is $5500 the right price range for
> such a job, or should I shop around on that? How do we find the best
> deal for a new one?
>
> Thank you so much!


Posted by Stormin Mormon on July 16, 2006, 8:23 pm
Well, now. Supposing the fellow replaced the evaporator. The old one
didn't have a TXV, and the new one would. What's the problem?

The only problem I can see if the compressor is low starting torque,
and requires the orifice to rapidly equalize the system pressures.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
.

Unfortunately, it sounds like this guy is telling you the truth. The
new 13 SEER (seasonal energy effiency ratings) standards that went
into
effect at the beggining of 06' have put several other homeowners as
well as large apartment complexes and municipalities in the same
situation. Older systems do not have a TXV or thermostatic expansion
vavle which will keep them from operating properly with newer
equipment. In this case, the best advise would probably be to avoid
the
local jack-leg "tech" who may offer to only change out one of the
units
to save you money.


Big Daddy wrote:
> We have a HVAC unit for a townhouse. It is 10 years old. We live
in
> Virginia. The unit has been slowly leaking freon over the past 2
> years,
> such that we have had to fill up the freon every spring in order for
it
>
> to cool properly. This spring, when we had the freon filled, we
asked
> the guy to add dye so we could find out where the leak was. Today
he
> checked the unit, and said the leak was mostly in the coils of the
> inside unit, and that we would have to replace both the inside unit
and
> the
> outside unit (at a cost of $5500) in order to fix the problem.
>
> I asked if we could repair the coils and he said you can't repair
> coils. I asked if we could replace the coils and he said he can't
buy
> replacement coils because the efficiency standards have changed. I
> asked if
> we could replace just the inside unit (and not the outside unit
because
>
> the outside unit works fine) but he said this wasn't possible
because
> then the two units wouldn't be compatible. I asked if we could just
> keep adding freon each year, and he says this is illegal, as it
> violates
> EPA rules about letting ozone-depleting freon into the atmosphere.
He
> swears the only solution is complete replacement of the whole
system.
>
> Does this sound right to you? Could he be trying to take us for a
> ride? Should I get a second opinion?
>
> If we do have to replace the unit, is $5500 the right price range
for
> such a job, or should I shop around on that? How do we find the
best
> deal for a new one?
>
> Thank you so much!



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