Refco ENVIRO Bedienungsanleitung Seite 14

7. In order to gain maximum recovery speed, a hose with inner
diameter bigger than 4 mm is recommended and the hose
should be shorter than 1.5 m.
8. While recovering large amounts of liquid, use the Push/Pull Mode.
9. After recovering, make sure there is no refrigerant left in the unit.
Read the purge operation carefully. Liquid refrigerant remaining
in the unit may be expanded and damage the components.
10. If the unit is to be stored or not used for any length of time, we
recommend that it be completely evacuated of any residual
refrigerant and purged with dry nitrogen.
11. Connection hose with check valve is recommended, it can
prevent refrigerant loss.
12. The intake port is equipped with filter screen, please wash it
frequently to keep it clean.
13. If it is difficult to start the unit, please turn the switch two rounds
to balance the internal pressure and make it easier to start the
unit.
14. The low-pressure gauge shows the pressure of the intake port of
the compressor and the high-pressure gauge shows the pressure
of the outlet port.
15. After using, please turn the knob to "0" position.
Instruction Manual 13