English (GB)
27
7.4.2 Dismantling the diaphragm and valves
This section refers to fig.
1. Make system pressureless.
2. Empty dosing head before maintenance and
flush it if necessary.
3. Set pump to "Stop" operating state using the
[Start/stop] key.
4. Press the [Start/stop] and [100 %] keys at the
same time to put the diaphragm into "out"
position.
– Symbol
must be displayed (see fig.
).
5. Take suitable steps to ensure that the returning
liquid is safely collected.
6. Dismantle suction, pressure and deaeration
hose.
7. Dismantle valves on suction and discharge
side (5, 6).
8. Remove the cover (9).
9. Loosen screws (8) on the dosing head (7) and
remove with discs.
10. Remove the dosing head (7).
11. Unscrew diaphragm (4) counter-clockwise and
remove with flange (2).
12. Make sure the drain opening (11) is not blocked
or soiled. Clean if necessary.
13. Check the safety diaphragm (1) for wear and
damage. Replace if necessary.
If nothing indicates that dosing liquid has entered
the pump housing, go on as described in
section
7.4.3 Reassembling the diaphragm and
. Otherwise proceed as described in
section
7.6.2 Dosing liquid in the pump housing
.
7.4.3 Reassembling the diaphragm and valves
The pump must only be reassembled, if nothing
indicates that dosing liquid has entered the pump
housing. Otherwise proceed as described in
section
7.6.2 Dosing liquid in the pump housing
This section refers to fig.
.
1. Attach flange (2) correctly and screw on new
diaphragm (4) clockwise.
– Make sure that the O-ring (3) is seated
correctly!
2. Press the [Start/stop] and [100 %] keys at the
same time to put the diaphragm into "in" position.
– Symbol
must be displayed (see fig.
3. Attach the dosing head (7).
4. Install screws with discs (8) and cross-tighten
with a torque wrench.
– Torque: 4 Nm.
5. Attach the cover (9).
6. Install new valves (5, 6).
– Do not interchange valves and pay attention to
direction of arrow.
7. Connect suction, pressure and deaeration hose
).
8. Press the [Start/stop] key to leave the service
mode.
9. Deaerate dosing pump
10. Please observe the notes on commissioning in
section
!
7.5 Resetting the service system
After performing the service, the service system
must be reset using the "
Info
>
Reset service
system
" function.
Warning
Danger of explosion, if dosing liquid has
entered the pump housing!
If the diaphragm is possibly damaged,
don’t connect the pump to the power
supply! Proceed as described in section
!
Caution
Tighten the dosing head screws
with a torque wrench once before
commissioning and again after
2-5 operating hours at 4 Nm.
