Thermo Scientific VF-F20-A, Operating Manual

Page: 153 / 240

7
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Maintenance and Service
Integral Fraction Collector FT (VF-F20-A) Operating Manual Page 153
7.5 Before Maintenance
This section describes how to prepare the device before starting
maintenance on the flow components in the device.
7.5.1 Preparing the Device for Maintenance
When
See the Preparations in the respective maintenance section to obtain if
shutting down and preparing the device for maintenance is required for
the procedure.
Follow these steps
1. Check that the fraction collection valve is set to waste position if the
valve is not yet in this position.
2. Flush the device with an appropriate, pure solvent. If a buffer
solution is part of the mobile phase, flush the device with several
volumes of methanol/water (50:50) before shutting down the
device.
3. Turn off the pump flow. Wait until the system pressure is down to
zero before you continue the shutdown of the device.
4. Empty the flush purge system:
a) Unscrew the cap of the flush solvent reservoir.
b) Together with the cap, remove the flush solvent tubing from the
reservoir.
c) When you remove the flush solvent tubing from the tubing
guides, be careful not to pull on other tubing in the guides.
d) Place the flush solvent tubing in an empty reservoir.
e) In Chromeleon, select the Purge Flush pump button on the
ePanel to empty the flush purge system.
5. Empty the drain pump:
Leave the drain pump turned on until no condensing water is
present in the waste tubing of the drain pump. Then turn off the
drain pump.