Robinair RG3000 Refrigerant Recovery Machine - Manual (Page 8)

8
O
perating
i
nstructiOns fOr
B
ulk
l
iquid
s
ystems
Vapor Recovery
1. Place the unit on a flat, level surface.
2. Connect a hose from the inlet side of the unit to
the liquid port of the system being serviced.
3. Connect a hose from the outlet side of the unit
to the liquid port on a recovery cylinder.
CAUTION: The recovery cylinder should be
on a scale to avoid overfilling the cylinder.
4. Open the liquid valve on the recovery cylinder.
5. Open the outlet valve on the unit.
6. Toggle the power switch ON.
7. Slowly open the inlet valve on the unit.
8. Run the unit until the desired vacuum is
achieved.
9. Close the inlet and outlet valves on the unit.
10. Toggle the power switch OFF.
11. Close the ports on the recovery cylinder.
Tech Tip
For a faster recovery procedure, recover from both
the liquid and vapor ports of the system being
serviced by using a tee fitting or manifold gauge
set in the hose setup.
1. Allow the storage cylinder to sit undisturbed for
24 hours to allow air to rise to the top.
2. Connect a manifold gauge set to the cylinder.
Read the amount of pressure in the cylinder as
indicated by the output pressure gauge.
3. Determine the ambient temperature in the
room.
4. Refer to a refrigerant pressure / temperature
chart and find the ambient temperature. Read
across the chart to the corresponding pressure
for the type of refrigerant in the cylinder.
Determine how that relates to the reading on
the gauge.
5. If the pressure reading in the cylinder is
higher than the pressure shown on the chart,
VERY SLOWLY crack open the vapor port
valve. (This is done slowly to cause as little
turbulence inside the cylinder as possible.)
Watch the pressure on the gauge decrease. To
prevent venting, add 4–5 psi (0.26—0.34 bar)
to the pressure shown on the chart.When the
gauge corresponds to that pressure, close the
vapor port valve.
6. Allow the cylinder to sit for 10 minutes and then
check pressure again.
7. Repeat the process, if necessary.
p
urge
n
On
-c
OndensaBle
g
as frOm a
s
tOrage
c
ylinder