Cryotherm BIOSAFE 120, Operating Manual

Page: 40 / 65

Operation
36
For this, see separate operating manual BIOSAFE-
CONTROL
®
ß
For the liquid nitrogen supply, the following requirements
apply:
•
Supply pressure: 0.5 – 2.0 bar
•
Liquid nitrogen has to be available as much as possible
directly at the connection of the connection line.
When connecting and exchanging the LIN – vessel,
wear gloves and safety glasses.
Cooled connection lines (fill lines) may never be
separated from the vessel or the supply line. Pene-
trating humidity can result in the freezing-in of the
solenoid valve!
When connecting the fill line to the vessel or the supply line,
please observe as follows:
•
After connecting the fill line, open the ball valve for the LIN-
withdrawal at the vessel or the supply line to a minimum.
•
By repeated pressing of the switch "filling" to "man.", rinse
the fill line. Only then open the ball valve completely.
Connecting the connection line (fill line):
•
Screw the union nut (3) on the connection screwing (2) of
the fill / withdrawal valve (1).
•
Tighten the union nut (3) with spanner. At the same time,
counter hold with the spanner at the hexagon (2) of the
connection screwing.
Retighten the union nut in cold condition.
7.1.2 Assembly of BIOSAFE-
CONTROL
®
ß
7.1.3 Connection of the liquid
Nitrogen Supply