Robinair 34134Z Refrigerant Recovery, Recycle, Recharge Unit - Manual (Page 18)

© 2003 SPX Corporation
16
Operation
4. Verify the oil drain valve is closed.
5. On the control panel, open both panel valves.
6. Press the Mode key until RECOVER X.XX LBS is displayed. (X.XX is the
amount of refrigerant capacity remaining in the internal storage vessel
[ISV].) Press the Start/Stop key to begin the recovery operation. Once
recovery begins, the RECOVER X.XXLBS changes from the amount in the
ISV to the amount being recovered.
Note: Verify there is enough capacity in the ISV by comparing the amount
of refrigerant in the A/C system to the amount on the display screen. The
amount in the A/C system should not be greater than the amount initially
displayed. If the amount is greater, charge some of the refrigerant from the
ISV into another refillable refrigerant tank.
IMPORTANT: The recovery compressor is not a vacuum pump. The
compressor pulls the A/C system to a partial vacuum only. You must use
the unit’s vacuum (evacuate) cycle to remove moisture from the A/C
system.
7. Watch the low-side gauge. When the pressure gauge reaches 10 in. Hg (34
kPa) vacuum, press the Start/Stop key. The display screen will indicate
how much refrigerant has been recovered, and then toggle between:
and
NOTE: Drain oil after the recovery is complete; refer to the next page for
instructions regarding draining the oil.
8. Close both panel valves.
9. Wait 5 minutes, and then check the low-side gauge for a rise in pressure to
above zero. If there is a rise in pressure, repeat steps 5 through 9 as
needed until the pressure holds below zero for 2 minutes.
NOTE: If the pressure does not drop to 10 in. Hg (34 kPa) vacuum or
does not hold at 10 in. Hg (34 kPa) vacuum for at least 2 minutes, there
was freezing in the A/C system during recovery or the A/C system requires
repair. Repeat recovery or repair the A/C system as necessary.
After recovering all refrigerant from the A/C system, drain the A/C system oil.
Refer to the instructions on the next page.
Note: The displayed recovered weight can vary, depending on ambient
conditions, and should not be used as an indicator of scale accuracy.
Recovering the A/C System Refrigerant contd.
RECOVER XX.XXLBS DRAIN OIL