Air conditioners and heat pumps compressors must have oil to lubricate
I would like to know why the certified HVAC technicians does not add
oil with the Freon when adding, or recharging after removing, the
Freon to an air conditioner, or heat pump system?
I can not find oil injection tools, or the oil for R-22 Freon
systems. For the auto air conditioners, there are oil injection
tools, and oil available for the R-134 Freon systems.
Just because you have lost a few pounds of refrigerant you most likely would
not need to add oil unless you have lost a large amount oil and if you do it
is going to cost allot of money to do so. You would have to remove the
existing oil in the compressor then remove any oil in the system then add
the amount of new oil back into the compressor.
Most of the time when you remove refrigerant from the system the oil stays
in the system.
You can buy an oil pump but again they are not cheap. They normally fit into
a gallon container and you just pump out the oil.
Ive been in da bidness 45 years... in the old days we recommended
changing the oil every 5 or 10 years,
now, today with improved 'driers with acid removal features'... we
test for acid in the oil, using a kit... if there is no acid nothing
needs to be done, oil is fine, drier is fine.
Acid shows up about a year before a compressor burns out... so its
serious. If its slight just install a big drier (a cartrige goes in
with flare nuts)...if its major, then you must suck the existing oil
out of the compressor and recharge with oil...a waste of money in my
book.. the damage has already been done...get new system...
when doing any of that you need to follow proceedures using a vacuum
pump to remove air and moisture prime causes of acid in a system.
(getting oil out of the evaporator and condenser to avoid an over
charge, not a bad idea.. but its seldom done, and when it is done not
all the oil comes out....a little overcharge of oil does not hurt
todays compressors, it did the older pistion types).
Marriotte Hotel corp are cheap skates.. however they they find it
cheapest in the long run not to repair equimpent over 10 years old...
good rule imo.
On Fri, 22 Aug 2008 18:46:21 -0400, "Stormin Mormon"
Stormy found this funny bicycle looking pump at a yard sale, didnt
know what it was and bought it anyways.
HVAC oil? Oh gee Stormy. Tell us which oil that is?
Is it the old dark thick stuff you pulled out of the drain plug of
your AMC Pacer service vehicle?
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