77
4
PRECAUTIONS FOR SAFE OPERATION
Only qualified engineers or service personnel should install this system. The installation by
unqualified personnel may cause electric shock or fire.
Turn off the all switches and disconnect the power supply to the ultra low temperature freezer
prior to the attachment of the back-up system in order to prevent electric shock or injury.
Never disassemble, repair, or modify the unit yourself. Any such work carried out by an
unauthorized person may result in fire or injury due to a malfunction.
There is a terminal (AC 100V) of the high voltage in the back-up system. Attach the back-up
unit cover before starting the trial operation. The operation without the cover may cause electric
shock.
CO
2
gas is released when the back-up system is operated. Use this kit in well-ventilated
environment as high CO
2
density level may cause a deficiency of oxygen.
This manual includes the attachment procedure for CVK-UB4 and CVK-UB4(I) only. For its
operation and the operation of a ultra-low temperature freezer, see an instruction manual provided
with the freezer.
Put on the dry gloves to protect the hands at the time of attachment. No gloves may cause cut
of the finger by the edge or corner.
Connect a pipe from a liquid CO
2
gas cylinder to this unit correctly. Incorrect connection may
cause gas leakage.
Check the gas piping before trial operation to avoid gas leakage.
Stop the operation immediately and review the attachment procedure carefully if there is
something wrong with the back-up system during the trial operation.
WARNING
CAUTION
