VACUUBRAND MZ 4C - Manual (Page 23)

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.: 997999 / 24/04/2008
page 23 of 28
➨ Tighten union nut first by hand and then tighten by one full
turn using open-ended wrench.
➨ Reconnect hose to the inlet of the condenser and tighten
union nut.
➨ Use open-ended wrench to reconnect hose to elbow fitting.
Assembling the pump at the pump support and on the base plate
(MD 4C + AK + EK / MD 4C + AK Synchro + EK)
➨ Assemble pump at pump support. Support pump appropriately.
➨ Screw in at each case two socket head screws at the rear and the front of the pump with hex key size 5.
Pay attention to washers.
➨ Position pump with pump support on the base plate and tighten the four hexagon nuts on the feet of the
pump support with an open-ended wrench w/f 10.
If the pump does not achieve the ultimate pressure:
☞ In case the diaphragms and valves have been replaced, a run-in period of several
hours is required before the pump achieves its ultimate vacuum.
If all pump heads achieve a vacuum below 120 mbar but pump does not achieve the
ultimate total pressure:
Check hose connectors between pump heads and manifolds for leaks. If necessary
recheck pump chamber. If necessary disassemble fittings again and screw in the el-
bow fittings another turn, use PTFE sealing bond as necessary.