Mitsubishi Electric s-AIRME-G02 Instructions For Installation, Use And Maintenance Manual page 18

Persons working on the unit shall have competence in the safety aspects of handling flammable refrigerants, supported by
evidence of appropriate training. This will include the following requirements:
•
Knowledge of legislation, regulations and standards relating to flammable refrigerants;
•
Detailed knowledge of and skill in handling flammable refrigerants, personal protective equipment, refrigerant leakage
prevention, handling of cylinders, charging, leak detection, recovery and disposal.
3.1.3.2 Gas presence sensor for units with R32
NOTICE:
Fire and smoke safety takes priority over leakage detection.
The gas presence sensor consists of a sensing element (sensor head) and a control board. Both are
located in the delivery fan compartment.
WARNING:
Do not change the position of the sensor elements.
The sensitive layer of the sensor reacts chemically to the presence of R32, changing its conductivity. The oxidation process
changes its resistance and thus the measurement, so regular calibrations are necessary. Carry out regular maintenance
according to the instructions.
WARNING:
Do not generate electrostatic charges.
Certain substances and gases in the air monitored by the sensor can change the sensitivity of the sensor element or damage
it completely.
The currently known substances are:
•
Polymerising substances such as ethylene oxide, acrylonitrile, butadiene, styrene, silicone.
•
Corrosive substances, such as halogenated hydrocarbons.
•
Catalytic poisons, such as sulphur and phosphorus compounds, silicon compounds, metal vapours.
•
Organic solvents
•
Oils and lubricants
Permissible temperature
Allowed humidity
Permissible pressure
Storage temperature
Storage
Calibration interval
Useful life
Type of gas
R32
WARNING:
Connecting the 24 V fieldbus voltage to the X7 terminal of the local bus may damage the board.
Installation, use and maintenance manual
OPERATING CONDITIONS
from -30°C to +60°C
from 15 to 90% relative humidity, non-condensing
from 0.9 to 1.1 bar
from 0°C to +50°C
Up to 12 months
12 months
> 60 months
MSR Unit MSR
FR08 2080-02
Calibration Measurement
gas range
R407c 20-2000 ppm
Relative
density
1.8
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