VACUUBRAND MZ 2C NT VARIO without controller (o.C.) - Manual (Page 66)

page 66 of 76
➨
Assemble the original number of washers
(H) between diaphragm support disc (G)
and connecting rod (I).
➨
Screw diaphragm clamping disc (E), dia-
phragm (F), diaphragm support disc (G)
and washers (H) to connecting rod (B).
➨
Optimum torque for the diaphragm support disc: 4.4 ft . lb
f
(6 Nm), it is
recommended to use a torque wrench. Attach Allen key to diaphragm
key (hexagonal bolt 6 mm wide).
Note: Never use the diaphragm key with any additional tools like tongs
or Allen keys without appropriate torque limitation.
F
E
Assembling the pump heads
➨
Place the pump in a way that the pump head to be assembled is at the
top. Support the pump appropriately.
➨
Bring the diaphragm (F) into a position in which it is in contact with the
housing (J) and centered with respect to the bore.
➨
Place the head cover (D) over the diaphragm. Check for its correct
orientation by aligning it beforehand with the housing cover which has
to be put over it later on.
+
Pay attention that the diaphragm (F) stays positioned centrally so that
it will become clamped uniformly between housing (J) and head cover
(D).
➨
Place the valves (B) and the O-rings (C) at
their respective positions on the head cover
(D).
+
Make sure that the valves are correctly
seated. See figure for the correct position of
the valves: Valves at the outlet with round
centered opening (S) under valve; valves at
the inlet with kidney-shaped opening (T) be-
side valve.
➨
Place the housing cover (A) with housing
cover insert onto the head cover.
S T