Help needed in determining which size vacuum pump and which fittings to purchase.



A little background. I've been learning auto airconditioning and have also been trying
to learn about home a/c systems. So far, thanks to this group, I've had some success
in troubleshooting a residential system...troubleshooting electrical problems, cleaning
condensor and evaporator coils and checking amount of charge in system.



My immediate problem I have a tiny freon leak in a home system, it's enough to set off a
freon detector, but the freon charge doesn't seem to be dropping (using a standard
manifold gauge and taking measurements over several weeks). A person recommended
trying the HVAC-R sealant which seems to be exactly for this type system a Bryant
24000 R-22 system.

The instruction say to apply a vacuum to the charging hose before connecting to the low
side of the system...... I'm thinking a vacuum pump is required and don't mind picking
one up as I enjoy using tools....(never met a tool I didn't like).... and would
actually like to learn more in-depth knowledge about a/c systems both residential and
automotive.

Robinair has some 1.5 CFM double stage pumps so does Monster....... What would you
recommend for a homeowner who wants to do occasionally repairs and checks on
systems, but is NOT a professional and would only use the equipment on an occasional
basis during learning and small repairs. ??

Which fittings should be ordered with the vacuum pump to solve the immediate problem
of creating a vacuum in a charging hose for an R-22 system.

Are there any good online tutorials on using vacuum pumps for a/c repairs ??


Thanking you in advance for your assistance and knowledge !!!

Peter


(ignorance is curable

Peter writes:

The instruction say to apply a vacuum to the charging hose before
connecting to the low side of the system.

Just purge the hose with refrigerant.

I suspect the tools will cost more than having someone else fix the
problem.

I any case, I've not tried the leak sealer stuff. My vacuum pump has a
3/8 flare fitting on it, and my ordinary gages are 1/4. So you'd want
a flare reducer.

Either that, or you can get a four valve manifold and a vacuum pump.
Sounds like you might use them for the auto work.

Someone else suggested just purge with refrigerant. Could work -- I'm
not sure.

--

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

"Peter" wrote in message
...

Help needed in determining which size vacuum pump and which fittings
to purchase.



A little background. I've been learning auto airconditioning and
have also been trying
to learn about home a/c systems. So far, thanks to this group, I've
had some success
in troubleshooting a residential system...troubleshooting electrical
problems, cleaning
condensor and evaporator coils and checking amount of charge in
system.



My immediate problem I have a tiny freon leak in a home system, it's
enough to set off a
freon detector, but the freon charge doesn't seem to be dropping
(using a standard
manifold gauge and taking measurements over several weeks). A
person recommended
trying the HVAC-R sealant which seems to be exactly for this type
system a Bryant
24000 R-22 system.

The instruction say to apply a vacuum to the charging hose before
connecting to the low
side of the system...... I'm thinking a vacuum pump is required
and don't mind picking
one up as I enjoy using tools....(never met a tool I didn't
like).... and would
actually like to learn more in-depth knowledge about a/c systems both
residential and
automotive.

Robinair has some 1.5 CFM double stage pumps so does Monster.......
What would you
recommend for a homeowner who wants to do occasionally repairs and
checks on
systems, but is NOT a professional and would only use the equipment
on an occasional
basis during learning and small repairs. ??

Which fittings should be ordered with the vacuum pump to solve the
immediate problem
of creating a vacuum in a charging hose for an R-22 system.

Are there any good online tutorials on using vacuum pumps for a/c
repairs ??


Thanking you in advance for your assistance and knowledge !!!

Peter


(ignorance is curable