MAHLE ROU250, Operation Manual, Page: 8 / 20

ROU250 ROU250
en | 8 | Operation
6.2 Purging Procedure
1. Close the ports of the system being serviced that
are connected to the input port of the machine.
2. Turn off the recovery machine.
3. Turn the Input valve to the PURGE position.
4. Turn the MODE valve to the PURGE position.
5. Restart the machine.
6. Run until desired vacuum is achieved.
7. Close the ports on the recovery tank and the
machine.
8. Turn the machine off.
9. Return the MODE valve to the RECOVER position.
10. Disconnect and store all hoses and dry filter.
6.3 Liquid push/pull procedure
Push/pull procedure only works with large systems where
the liquid refrigerant is no less than 6.8kg (15lbs.).
1. Turn MODE valve knob to RECOVER.
2. Open OUTPUT valve.
3. Open INPUT valve.
4. When the scale stops rising, close all ports.
5. Switch off the machine.
CAUTION:
CAUTION: CAUTION:
CAUTION:
When using the When using the When using the When using the “
“ “
“ Push/pull Push/pull Push/pull Push/pull ”
” ”
” method, a scale must method, a scale must method, a scale must method, a scale must
be used to avoid over filling the storage tank, once the be used to avoid over filling the storage tank, once the be used to avoid over filling the storage tank, once the be used to avoid over filling the storage tank, once the
siphon
siphon siphon siphon is started, it can continue and overfill the is started, it can continue and overfill the is started, it can continue and overfill the is started, it can continue and overfill the
storage tank even if storage tank even if storage tank even if storage tank even if the tank is equipped with a the tank is equipped with a the tank is equipped with a the tank is equipped with a float float float float
level
level level
level sensor. The siphon can
sensor. The siphon can sensor. The siphon can
sensor. The siphon can continue even when the
continue even when the continue even when the
continue even when the
machine is turned off. You must
machine is turned off. You must machine is turned off. You must
machine is turned off. You must manually close the
manually close the manually close the
manually close the
valves on the tank and the unit to prevent valves on the tank and the unit to prevent valves on the tank and the unit to prevent valves on the tank and the unit to prevent overfilling of overfilling of overfilling of overfilling of
the recovery tank the recovery tank the recovery tank the recovery tank