35
BACK-UP SYSTEM (OPTION)
WARNING
As with any equipment that uses CO
2
or N
2
gas, there is a likelihood of oxygen depletion in the
vicinity of the equipment. It is important that you assess the work site to endure there is suitable
and sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a
safe environment must be considered. These may include atmosphere monitoring and warning
devices.
This freezer can be provided with a back-up system (CVK-UB2 / CVK-UBN2) which is available as an
optional component. For the installation, refer to the instruction manual enclosed with the system.
Contact SANYO sales representative or agent for the installation of a temperature recorder.
1. Switch of back-up system (BACKUP)
When turning on the system, the back-up standby lamp
is brightened. This means that the system is ready. To
stop the operation of the system, turn off this switch.
2. Test switch (TEST)
This switch is for checking the operation of back-up
system. Pressing this switch is resulted in the release
of liquid carbon dioxide without system operation.
3. Temperature setting knob (TEMP. SET)
With this knob, set the temperature at which the system
is operated. The effective set temperature range is
between -50
o
C and -70
o
C.
Note:
Do not set the temperature setting knob to the
temperature lower than -70
o
C to avoid the early
consumption of CO
2
or N
2
gas resulting from
continuous injection.
Do not set it up in less than -70
o
C.
4. Back-up standby lamp (BACK UP STANDBY)
This lamp is on/off conjunction with the operation of
switch of back-up system.
1
2
3
BACK UP
STANDBY
4
Door switch box
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