VACUUBRAND MZ 2C EX +IK+EK - Manual (Page 49)

page 49 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
➨ Position pump in a way so that the disassembled pump
head is above, support if necessary.
➨ By turning eccentric bushing (front of connecting rod),
bring connecting rod into a position in which diaphragm is
in contact with housing and centred with respect to bore.
Reassemble in reverse order.
➨
Install head cover with O-ring, valves and housing cover
with housing cover insert.
☞ Make sure that the valves are correctly seated: Valves at
the outlet with round centred opening under valve, valves
at the inlet with kidney-shaped opening beside valve.
☞ Ensure that the diaphragm is positioned centrally so that it
will become clamped uniformly between housing and head
cover.
Assembling the pump head
➨ Screw in four socket head screws fixing housing cover
crosswise (e. g. in the sequence 1,2,3,4) first slightly, then
tighten.
☞ Do not tighten until head cover is in contact with housing,
torque 12 Nm.
Attention: Ensure that the diaphragm clamping disc
never hits the head cover! In case of loud knocking
switch off the pump immediately.
Inspect pump or replace diaphragms and valves at the
other pump heads analogue.
3 2
1
4
➨ Measure the pressure at the inlet port of the individual
head: Use a suitable vacuum gauge (e. g. DVR 2, cat.
no.: 682902), make sure that it is correctly calibrated, and
measure the pressure at the inlet port. A vacuum of less
than 120 mbar should be indicated.
☞ If the reading is higher, recheck the pump chamber and
make sure that the valves and the diaphragms are cor-
rectly seated (diaphragms concentric with bore).
➨ Screw housing plate to pump.
Individual performance check of a pump head