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12.3
Replacing separating diaphragm of the diaphragm rupture sensor
12.4
Installing dosing head
1.
Disconnect the diaphragm rupture sensor from the monitor.
2.
When changing the diaphragm, unscrew the diaphragm rup‐
ture sensor from the dosing head.
3.
Grasp the upper section (2) of the diaphragm rupture sensor.
Do not manipulate the lacquer-protected nut.
4.
Hold the body (5) in place with an open-ended spanner.
5.
Unscrew the top of the diaphragm rupture sensor.
6.
Clean the soiled parts.
7.
Lay the new separating diaphragm (3) with the light side
(PTFE) down into the upper section (2).
8.
Place the disc (4) in the upper section (2).
9.
Place the spring inside the body (5).
10.
Move the body (5) close to the upper section (2).
ð The spring (6) must sit correctly on the spring seat (3a).
11.
Screw the body (5) into the upper section and tighten.
12.
Connect the diaphragm rupture sensor back to the monitor.
13.
Check the diaphragm rupture sensor as described in
"Checking diaphragm rupture sensor".
14.
If the diaphragm rupture sensor does not operate clearly and
reliably, then a new diaphragm rupture sensor must be used
without fail.
15.
For the following steps, see the next chapter.
1.
Place dosing head (4) with its screws (24) far enough onto
the diaphragm (25) and the backplate (3) so that the parts
can still be turned (distance of approx. 5 mm between dosing
head and backplate); the suction connector and leakage hole
must face downwards.
2.
Now turn these parts clockwise until the twisting resistance of
the return spring can be felt and the diaphragm is secure.
CAUTION!
Do not over-tighten the diaphragm.
3.
Switch on the pump.
4.
Use stroke length control knob (14) to set stroke length to
100 % and turn the entire liquid end to the right until the suc‐
tion connector is pointing vertically downwards.
5.
Switch off the pump.
6.
Tighten the 4 screws (24) crosswise. See below for tight‐
ening torques.
Repair
43
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