Arctiko CRYO 170, Operating Instructions Manual, Page: 23 / 40

GB
22
Explanation of Optional Liquide Nitrogen Backup
system (LN2)
The product of -150
°
C has an automatic cooling auxiliary device as optional.
As to an automatic cooling auxiliary device, the inner temperature of a freezer rises, a
magnetic valve connected to LN2 cylinder opens when the temperature reaches -130
°
C, an
alarm buzzer goes off and at the same time LN2 sprays from two nozzles into the freezer.
The inner temperature of a freezer while LN2 sprays intermittently
keeps around -125
°
C~- 135
°
C.
1. Installation of LN2 cylinder and hose connection
• A pressurized nitrogen cylinder is used for a LN2 cylinder
• Turn off AL-1 switch, REMOTE switch, and BACKUP SYSTEM switch on a control panel.
• Connect the sow block (small sow block) on the end of an automatic cooling auxiliary
device hose (3M) to a magnetic valve (SV5) and clap up firmly with a spanner not to
have a leakage. Then, connect the large sow block on the end of a hose to a
cylinder; clap up firmly with a spanner not to have a leakage.
• If a user, opens a liquid purge valve of a cylinder, LN2 fills up to a magnetic valve
(SV5) via the hose of an automatic cooling auxiliary device.
BAT
·check
AL-2 lamp
AL-1 switch
BACKUP SYSTEM switch