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
to learn about home a/c systems. So far, thanks to this group, I've had some
in troubleshooting a residential system...troubleshooting electrical problems,
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
manifold gauge and taking measurements over several weeks). A person
trying the HVAC-R sealant which seems to be exactly for this type system a
24000 R-22 system.
The instruction say to apply a vacuum to the charging hose before connecting to
side of the system...... I'm thinking a vacuum pump is required and don't
one up as I enjoy using tools....(never met a tool I didn't like).... and
actually like to learn more in-depth knowledge about a/c systems both
Robinair has some 1.5 CFM double stage pumps so does Monster....... What
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
basis during learning and small repairs. ??
Which fittings should be ordered with the vacuum pump to solve the immediate
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 !!!
(ignorance is curable