Helpful Hints; Planning Ahead; Tips For Maximizing Recovery Performance - Appion G5Twin Operation Manual

Helpful Hints

PLAN AHEAD
In just a few years, refrigerant recovery has come a long way. At first glance, it's simply the process of taking
refrigerant out of a system and putting it into a storage tank. However, this simple process can rapidly become
difficult and time consuming if a few things are overlooked. What follows are some notes and guidelines that
we have learned over the years that can help you save time and make the job easier.
The first thing you need to do is determine the quantity and type of refrigerant that is being used in the system
you are working on. Use a tank that is DOT approved for the high pressures that are present with R410a. If the
system is a burnout, you will need to use a special tank marked as containing burnout and other unidentified
gases and you must use extra filtration before recovery. This extra filtration is to protect your equipment from
corrosion caused by acids that may be present.
If the gas in the system is fairly clean or new, then you should use a clean, new tank. If the refrigerant is going
to be reclaimed, or you are going to put the refrigerant back into the system when you are done servicing
it, then you should use a tank with the same type of refrigerant in it. One note of caution: If you use many
different gases and you only own a single tank, you're asking for trouble with the Environmental Protection
Agency (EPA). You should own at least one tank for every type of refrigerant that you will service, and a spare
tank for unknown gases and burned out systems.
TIP #1 Output Restrictions: Loud Recovery & High Pressure Shutoff
It is a common belief that recovering liquid refrigerant will always be "noisy." However, the "hammering"
or "knocking" sound associated with recovering liquid can often be caused by output restrictions, which is
any flow restriction between the recovery machine and the interior of the recovery cylinder. If the G5Twin is
excessively noisy during liquid recovery, check for, and remove, any output restrictions.
Another common symptom of output restrictions is the recovery machine intermittently shutting off on high
pressure, but resets on its own after the output pressure quickly drops in a short time. If the G5Twin shuts off
on high pressure but the output pressure quickly drops, check for, and remove, any output restrictions.
Prolonged pumping against output restrictions not only slows the recovery process, but the increased load
can accelerate the wear of your recovery equipment. This wear can be seen with damaged output gauges,
electrical component failure, and slower performance on the bench test (see Page 18).
Remove Output Restrictions to Maximize Recovery Performance:
To improve recovery performance, and prolong the life of your equipment, take the time to remove these
typical output restrictions before you start:
•
Remove core depressors from all of the hose fittings (they block up to 50% of the flow) - See Tip #4
•
DO NOT USE refrigerant charging hoses with "quick disconnect" or "auto-shutoff" fittings
•
Make sure that the recovery cylinder valve is completely opened
•
Discard of used/worn hoses with deteriorating inner linings
G5TWIN OPERATION MANUAL
© 2016 APPION INC. - ALL RIGHTS RESERVED
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