SystemAir AC-RSR105R32HEC, Installation And Maintenance Manual

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6 SYSAER R32
²
Refrigerant detectors for R32
A refrigerant detector for a group A2L refrigerant shall activate the alarm signal at a level not
exceeding 25 % of the LFL of the refrigerant. The detector shall continue to activate at higher
concentrations. The detector shall be set lower for the toxicity, if applicable. It shall automatically
activate an alarm, start mechanical ventilation and stop the system when it triggers.
Refrigerant LFL Threshold level
R32 0,307 kg/m
3
0,7675 kg/m
3
=> 36000 ppm
The installation of the detector shall allow access for checking, repair or replacement by an
authorized person.
The detector shall be installed so its function can be verified easily.
The detector shall be protected to prevent tampering or unauthorised resetting of the pre-set value
The R32 detector is composed of a gas sensor on ventilation side and a control board.
The sensitive layer of the sensors reacts chemically in the presence of R32, changing its conductivity. The
different oxidation processes modify the conductivity and therefore the measurement, which is why regular
calibrations are necessary. Regular maintenance must be carried out in accordance with the instructions. Do
not generate electrostatic discharges.
The following are currently known to poison the sensor and change its sensitivity:
²
Polymerizing substances such as ethylene oxide, acrylonitrile, butadiene, styrene, silicone.
²
Catalytic poisons, such as Sulphur and phosphorus compounds, silicon compounds, metallic vapors.
²
Organic solvents.
1.4. GAS DETECTOR
Cutoff power supply before starting to work on the appliance.
When making the hydraulic connections, ensure that no impurities are introduced into the pipe work.
The manufacturer declines any responsibility and the warranty becomes void if these instructions are
not respected.
If you meet a problem, please call the Technical Department of your geographical area.
If possible, assemble the compulsory or optional accessories before placing the appliance on its final location.
(see instructions provided with each accessory).
In order to become fully familiar with the appliance, we suggest to read also our Technical Instructions.
The information contained in these Instructions are subject to modification without advance notice.
1.5. WARNING