VACUUBRAND MZ 2C EX +IK+EK - Manual (Page 28)

page 28 of 75
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. manual-no.: 999128 / 29/04/2014
During operation
• Maximum ambient temperature: 40 °C
• Make sure ventilation is adequate especially if the pump is installed in a housing
or if the ambient temperature is elevated. Install an external automatic ventilation
system if necessary.
• If the pump is installed in altitudes of more than 1000 m above mean sea level
check compatibility with applicable safety requirements, especially IEC 60034
(motor might overheat due to insufficient cooling).
☞ If the pump has been exposed to increased ambient temperature (> 40°C)
check the pump for damage and perform a leak test if necessary (integral
leak rate < 0.1 mbar*l/s).
• Potentially explosive mixtures at the outlet of the pump have to be drained ap-
propriately.
• Due to the high compression ratio of the pumps, pressure at the outlet port might
be generated being higher than the max. permitted pressure compatible with the
mechanical stability of the system.
☞ Check compatibility with max. permitted pressure at the inlet and the outlet and
max. pressure difference between inlet and outlet ports.
Ensure that the pump outlet is not blocked or restricted.
Do not start pump if pressure difference between inlet and outlet port exceeds
max. 1 bar. Attempts to start pump at higher difference may cause blockade
and damage of the motor. Check compatibility with maximally permitted pres-
sure at inlet and outlet.
Check the pump regularly at the outside for pollution or deposits, clean the pump if
necessary to avoid increase of the operation temperature of the pump.
If pumping different substances purge the pump with inert gas prior to change the
pumped media to pump out residues and to avoid reactions of the pumped sub-
stances with each other and the pump material.
Take into considerations interactions and chemical reactions of the pumped media.
☞ Ensure that the system design does not allow the exhaust pipeline to be blocked
(hose nozzle 10 mm), do not permit uncontrolled pressurizing.
☞ Connect the exhaust to a suitable treatment plant to prevent the discharge of
dangerous gases and vapours to the surrounding atmosphere.
☞ The pumped gases at the outlet of the pump or at the exhaust waste vapour
condenser have to be drained under consideration of all applicable safety regula-
tions.
The user has to check the possibility of an explosive atmosphere at the outlet of
the pump or the exhaust waste vapour condenser. Therefore for example calcu-
late the solvent partial pressure at the present cooling water temperature at the
exhaust waste vapour condenser and compare with the explosion limits of the
pumped solvent. If there is an explosive mixture, drain the gas at the outlet in
antistatic lines according to the valid explosion protection guidelines.