Once initialisation is complete, the system's function can be checked by means of CO
2
contact testing. The CO
2
concentration should be between 3% and 100 %
in order to trigger an alarm.
The blue protective cover on the sensor unit is fitted with a nozzle, through which gas can be fed into the sensor unit. If the gas has a CO
2
concentration of 1.5%,
it will trigger the pre-alarm; at 3% CO
2
, it will trigger the main alarm.
Test the fault message by disconnecting the plug on a sensor unit.
When used in freezer units, the sensor units must be adjusted to the ambient temperature
before commissioning. Otherwise, undefined fault messages will be shown, which will
disappear once the sensor units are acclimatised. Only then will your system be ready to run!
3.2.1In-service inspections
a)Gastronomy
Periodic inspections by a nationally recognised body for periodic inspections will allow a check of the correct entries for the gas detection system in the
dispensing log, the approval of the system and the regular maintenance of the equipment.
The time left till the next maintenance can be seen on the maintenance plate on the sensor unit or in the dispensing log sheet.
b)CO
2
refrigeration
Regular annual checks of the safety device in accordance with DIN EN 378, during which alarm triggering with CO
2
is not only used to check the CO2 CONTROL
but also in particular the transmission and subsequent actions by the control system and/or building management system. No checks of the alarm thresholds
and their tolerance ranges with a test gas are required! Calibration is performed at our plant after 4 years of operation, by swapping out the sensor on site. For
further details, please see the CO2 CONTROL AM / AM PLUS installation instructions.
3.2.2Power failure
The green power light will turn off in the event of a power failure. Once the power supply is restored, the unit will reset to its start mode prior to the power
failure. No work on the device is required after a power failure. The unit will continue to run seamlessly in operating mode.
3.3Re-commissioning after swapping-out
The sensor unit must be replaced after 4 years of operation. The operator will receive a re-conditioned replacement unit. The old sensor unit will be checked for
functionality, cleaned and calibrated at our plant. When the sensor unit is swapped out, the gas detection system must be re-initialised (see 3.1 System
initialisation and the additional notes in the CO2 CONTROL AM / AM PLUSinstallation sheet for the CO2 CONTROL AM / AM PLUS versions).
Re-commissioning after system expansion
When the system is subsequently expanded (with a second sensor, signal unit or other), the entire system must be re-initialised once the components have been
installed (see 3.1).
When used in freezer units, the sensor units must be adjusted to the ambient temperature
before commissioning. Otherwise, undefined fault messages will be shown, which will
disappear once the sensor units are acclimatised. Only then will your system be ready to run!
3.4Instruction for the operator
Once the gas detection system has been successfully installed, the operator and their staff must be trained to use the equipment.
The following points must be explained:
- Functionality
- Recognising and differentiating between the pre- and main alarms
- Recognising malfunctions
- Measures to be taken in the event of a gas alarm (see Chapter 6)
- Entries in the dispensing log / test documentation
The operator is responsible in accordance with the Betr.Sich.V. for informing and training
their staff about the gas detection system and their behaviour in the event of a gas alarm!
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