page 15 of 68
20901106_EN_MD4_MV2_VARIO_select_V1.0_140818
The supply cable may be fitted with a molded Europe
-
an IEC plug or a plug suitable for your local electrical
supply. The cable contains wires color coded as fol-
lows: green or green and yellow: ground; blue or white:
neutral; brown or black: hot.
+
Due to the high compression ratio, the pump may gen-
erate overpressure at the outlet. Check pressure com-
patibility with system components (e.g., exhaust pipe-
line or exhaust valve) at the outlet.
+
Do not permit any
uncontrolled pressurizing
. Make
sure that the exhaust pipeline cannot become blocked.
If there is an exhaust isolation valve, make sure that you
cannot operate the equipment with the valve closed to
avoid a
risk of bursting!
+
Maximum permissible pressure at the pressure trans-
ducer: 21.8 psi (1.5 bar) absolute.
+
Keep the electrical power cord away from heated sur-
faces.
• Provide a firm, level platform for the equipment. Check
that the system which you are going to evacuate is
mechanically stable. Check that all fittings are secure.
Ensure a stable position of the pump without any me-
chanical contact other than the pump feet.
• Comply with
maximum permissible pressures
at in-
let and outlet and with
maximum permissible pres-
sure differences
between inlet and outlet. See section
“Technical data”, pg. 25. Do not operate the pump
with overpressure at the inlet.
• Comply with
maximum permissible pressures
at the
pressure transducer. See section “Technical data”, pg.
• Avoid overpressure of more than 17.5 psi absolute (1.2
bar absolute) in the event that gas or inert gas is con-
nected to the pump, or to a venting valve.
