VACUUBRAND MZ 8C - Manual (Page 30)

page 30 of 52
pump in a cabinet or a housing. Make sure ventilation
is adequate, especially if the ambient temperature is
elevated.
• If the pump is installed at an altitude of more than 6500
ft (2000 m) above mean sea level, check compatibility
with applicable safety requirements, and adopt suit-
able measures. There is a risk of the motor overheat-
ing due to insufficient cooling.
• Check compatibility with the maximally permitted
pressure at outlet and the maximum pressure dif-
ference between inlet and outlet ports.
Do not start the pump if the pressure difference between
inlet and outlet ports exceeds max. 16.0 psi (1.1 bar).
Attempts to start the pump at higher pressure difference
may cause stalling and damage of the motor.
If pumping condensable vapors (water vapor, solvents,
etc.), let the pump run with gas ballast to help purge any
condensation in the pump.
Prevent internal condensation, transfer of liquids or dust.
The diaphragms and valves will be damaged, if liquids are
pumped in significant amounts.
Check the pump regularly for external soiling and depos-
its. Clean the pump if necessary to avoid an increase of
the pump’s operating temperature.
In case of overload, the motor is shut down by a self-hold
thermal cutout in the winding.
Three-phase motors are equipped with a circuit- breaker
which isolates all poles in case of an overload.
Note: Only manual reset is possible. Switch off the pump
and disconnect from the power source. Identify and elimi-
nate the cause of failure. Allow the pump to cool down suf-
ficiently before restart. Wait approx. five minutes before
restarting the pump.
Avoid overheating (e.g., due to hot process gases).
Make sure the fan’s air supply is adequate. Do not place
the pump on soft surfaces (e.g., rubber foam) during op-
NOTICE