Robinair AC375C Refrigerant Recovery, Recycle, Recharge Unit - Manual (Page 19)

Recover/Recycle/Recharge Unit
17
Operation
3. On the control panel, open both panel valves.
4. Press the Menu key ( ) until RECOVER X.XX KG 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, RECOVER X.XXKG changes from the amount in
the ISV to the amount being recovered.
Note:
• Verify there is enough room 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 making enough room available.
• 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.
5. Watch the low-side gauge. When the pressure gauge reaches 34 kPa
(10 in. Hg) vacuum, press the Start/Stop key ( ). The display screen will
indicate how much refrigerant has been recovered. The display screen
toggles between:
and
NOTE: Drain oil after the recovery is complete; refer to next page for
draining the oil.
6. Close both panel valves.
7. Wait two 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 4 through 8 as
needed until the pressure holds below zero for two minutes.
NOTE: If the pressure does not drop to 34 kPa (10 in. Hg) vacuum, or
does not hold at 34 kPa (10 in. Hg) vacuum for at least two 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.
8. Press the Start/Stop key ( ) to exit the recover function.
After recovering all refrigerant from the A/C system, drain the A/C system oil.
Refer to the instructions on the next page.
Recovering the A/C System Refrigerant contd.
RECOVER XX.XXKG DRAIN OIL
CAUTION:
Using the
recovery
compressor in
vacuum for an
extended period
of time could
damage the
compressor.