Thermo Scientific VF-F20-A, Operating Manual

Page: 159 / 240

7
•
Maintenance and Service
Integral Fraction Collector FT (VF-F20-A) Operating Manual Page 159
7.7 Needle Wash Lines
Follow the instructions for the maintenance procedure that you want to
perform:
•
When you replace the needle wash liquid, observe the guidelines in
Needle Wash Liquid Guidelines (

Page 159)
•
When you replace needle wash lines, see Replacing Needle Wash
Lines (

page 160)
•
When you perform a needle wash cycle, purge or flush the needle
wash system, see
Performing A Needle Wash Cycle (

page 162)
7.7.1 Needle Wash Liquid Guidelines
When replacing the needle wash liquid, with the same liquid or when
changing the needle wash liquid, observe the following:
•
Before filling the needle wash reservoir, rinse the reservoir
thoroughly. Make sure that no particles, dust or algae are present.
•
Recommended when using 100% water as needle wash liquid:
Replace the needle wash liquid daily.
•
Use a needle wash liquid that is suitable for your application and
that removes residual sample from the needle sufficiently.
•
Check the liquid level of the needle wash reservoir. Fill the needle
wash reservoir with fresh needle wash liquid if required.
•
If you want to use a completely different needle wash liquid:
Ensure that it is compatible with the wash liquid used or change to
the new wash liquid stepwise.
•
After replacing the needle wash liquid:
In Chromeleon, purge the needle wash system to fill up the needle
wash port with the fresh needle wash liquid. During purging, the
needle wash port and the fluid path is flushed continuously until the
fresh needle wash liquid is present.