Sanyo MDF-593 Instruction Manual page 21

OPERATING INSTRUCTIONS
Back-up system
WARNING
As with any equipment that uses CO
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.
The freezer AT type is provided with an automatic liquid CO
This freezer prevents the chamber temperature from going up by injecting the liquid CO
power supply is disconnected (power failure, disconnection of power cord, breaker OFF) or in the case of
failure of freezer itself. The liquid CO
battery when the chamber temperature reaches the alarm temperature.
Following shows the procedure for setting the back-up system.
1. Setting of liquid CO
By using the joint and pipe enclosed with the
freezer, connect the liquid CO
joint of the back-up system.
consult with a qualified gas supplier or Sanyo sales
agency.
2. After setting the liquid CO
the freezer until the chamber temperature reaches
the required level.
3. Set the warning indicator of the recorder at the
temperature higher than -70
system is operated continuously if the warning
indicator is set at the temperature lower than -70
This means the liquid CO
quickly.
4. Switch on the back-up system.
5. Make sure that liquid CO
switch.
Note:
• The liquid CO gas cylinder loses its cooling capacity at speed when the ambient temperature is over
2
o
31 C. Install the liquid CO
one liquid CO gas cylinder varies depending on the ambient temperature. Refer to "Installation of
2
back-up system" enclosed with the freezer for the available back-up time.
• The liquid CO gas cylinder should be a siphon type.
2
• Use the pipe enclosed with the freezer for the setting. (The extension of the pipe is not permitted
gas, there is a likelihood of oxygen depletion in the vicinity
2
gas is injected with the activation of solenoid valve energized by
2
gas cylinder
2
gas cylinder to the
2
For this setting,
gas cylinder, operate
2
o
C. The back-up
gas is consumed very
2
gas spouts into the freezer chamber by pressing the CO2 back-up test
2
gas cylinder in the cool environment. And the duration of back-up time per
2
gas injection device as a back-up system.
2
Rough scheme
Solenoid valve
o
C.
20
gas when the
2
Liquid CO2
gas cylinder
Pipe