Co2 Backup System (Optional) - Infrico Lab Care Plus ULF70086 Service Manual

16 CO2 BACKUP SYSTEM (OPTIONAL)

The Ultra freezers are designed to optionally incorporate a CO2 backup system, which must be installed
in the factory. To work properly, it is necessary to use liquid CO2, do not use gaseous CO2
The CO2 backup system has been designed to provide a system of maintaining the contents of your
Ultra freezer at a pre-set temperature in case of the power supply or cooling system fail. This system
incorporates a safety microcontroller, which is turned off at the factory, and must NOT be turned on until the
setpoint temperature is reached. The CO2 backup system is supplied without CO2 bottles.
The CO2 backup system is plugged into a battery and has a factory default temperature of -65ºC. When
the temperature inside the Ultra freezer increases above the setpoint temperature, the injector is activated,
releasing CO2 inside the cabinet.
If the door is opened during the CO2 injection, a door opening sensor disable the gas injection while
the Ultra freezer remains opened. This prevents the user from being burned by the extremely cold gas stream.
If you need to modify the setpoint temperature of the backup system, follow the steps below:
1. Close the valve of the CO2 bottle.
2. Open the lower grid of your Ultra freezer. When you open the grid, on the right side, you will see a
microcontroller.
3. In case the microcontroller is blocked, press the SET
appears.
4. Press the SET
5. Use the arrows
6. Press the SET
key again.
, to set the desired value.
key to confirm.
51
Service Manual and Warranty
for a few seconds, until the letters Unl