Knauer Azura V6840, Руководство пользователя

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P 2.1L user manual V6840, version
3. 5
12 Installation
Connecting the Piston Backflushing
The piston backflushing removes salts and other substances from the area
behind the seals. To do this, connect a bottle with flushing solution to the
flush pump and to the pump head. The connection between pump head
and flush pump is preinstalled at the factory.
Functional principle The piston backflushing function automatically flushes the rear piston area
of the pump head upon switch-on and in continuous mode.

Upon switch-on: The rear piston area of the pump head is automatically
flushed for 30 seconds.

In continuous mode: The rear piston area of the pump head is flushed
automatically every 60 minutes, for 30 seconds.
Designation Inlet and outlet of the flush pump are located on the front of the device.
Flushing solution:
These are suitable flushing solutions:

Water

Mixture of 80 % water and 20 % ethanol

Isopropanol
Device defect
Damage to the pump head caused by overtightened capillary fittings. Note
the torque of the fittings.

Use 5 Nm torque for stainless-steel fittings.

Use 1 Nm torque for PEEK fittings.
Note: PEEK fittings can withstand pressures up to 400 bar for 1/16" and
200 bar for 1/8".
Fig. 5 Inlet symbol Fig. 6 Outlet symbol
Procedure Process Figure
1. Use the first hose to connect the
inlet
1
of the flush pump to the
bottle containing the flushing
solution.
2. Lead a tube from the flush
pump's outlet
3
to the pump
head's inlet 4 and fasten.
3. Use the second hose to connect
the pump head
2
to the bottle
containing the flushing solution.
Fig. 7 Connectors of pump head
and flush pump
4
3
1
2
Note:
KNAUER recommends the use of pure isopropanol as flushing
solution for piston backflushing.