Robinair RG3000 Refrigerant Recovery Machine - Manual (Page 4)

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NOTE: Throughout this operating manual the term
“unit” is used when referring to the RG3000 refrigerant
recovery machine.
Refrigerant recovery is the process of taking refrigerant
out of a system and storing it in a cylinder. The following
information is critical to achieving the best refrigerant
recovery results.
Refrigerant
Identify the refrigerant type and quantity in the system to
be serviced.
The unit is approved for use with the following category
III, IV, and V refrigerants (per ARI-740) :
R-12, R-22, R-134a, R-401a, R-401b,R-401c, R-402a,
R-402b, R-404a, R-406a, R-407a, R-407b, R-407c,
R-407d, R-408a, R-409a, R-410a, R-411a, R-411b,
R-412a, R-500, R-502, R-507 R-509
Filters and Filter / Driers
CAUTION : Filters prevent contamination from
entering the unit, which reduces the risk of damage
to the unit and the system being serviced.
The unit is shipped with a filter screen installed behind
the inlet fitting. Promax strongly recommends that a
clean filter screen be used for every service job. Failure
to use a filter screen will invalidate your warranty.
The unit is also shipped with (1) filter / drier (Part No.
100343) for use at the inlet fitting. However, if there is a
need to recover multiple, different refrigerants using this
unit, a separate filter / drier must be labeled and used for
each individual type of refrigerant.
Valves
WARNING : To prevent personal injury, open
service and cylinder valves SLOWLY to allow
rapid shut-off of gas flow if necessary. Once it is
determined there is no danger, the valves may be
opened fully.
Isolate large amounts of refrigerant and close valves
after use, so if a leak should develop anywhere in the
system, refrigerant will not escape to the atmosphere.
Storage Cylinders
WARNING : A storage cylinder is full when it
reaches 80% volume. DO NOT OVERFILL. Due to
liquid expansion, the cylinder could explode if filled
to more than 80% volume, possibly causing personal
injury and equipment damage. Use a scale, such as
TIF9010A, to avoid overfilling the storage cylinder.
Hoses
Hoses must be equipped with low-loss fittings and have
pressure ratings appropriate for the refrigerant in the
system being serviced.
Shut-off Switch
This unit has an internal, high-pressure, shut-off switch.
If system pressure rises above 550 psi, the unit shuts
off. The shut-off switch automatically resets itself after
pressure drops below 400 psi.
WARNING : The internal pressure shut-off
switch does NOT prevent cylinder overfill. If the
system shuts off automatically and is connected
to a cylinder, the cylinder may be dangerously
overfilled. Take immediate measures to relieve the
high pressure and / or cylinder overfill situation, or
personal injury may result.
Push / Pull Procedure
When recovering large amounts of liquid (over 15 lbs.),
use the Push / Pull method described in this manual.
Maximum Vacuum and Recovery Rates
To achieve the deepest final vacuum, use an evacuated
recovery cylinder. To maximize recovery rates :
•
Use the shortest possible length of 3/8 in. or larger
hose. (A hose no longer than 3 feet is recommended.)
•
Remove unnecessary hose core depressors, and
remove Schrader valves from port connections.
Deformed rubber seals and core depressors in hoses,
as well as faulty or unnecessary Schrader valves, can
restrict flow.
Maintenance
CAUTION : Keep all connections to the refrigeration
system dry and clean. Damage will occur if moisture
is allowed to enter the system.
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