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Prevention of other residual risks
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When using R32 refrigerant, it will be necessary to take into account its LFL (Low Flammable Level), equal to 0.307 kg/m3.
To reduce the risk of flame, avoid areas with a gas concentration greater than 0.077 kg/m3 (25% LFL).
•
To ensured safety with units charged with R32 refrigerant, make sure to observe the minimum area constraints for
installation as outlined in Section 2.2.1.2.
•
Units using R32 refrigerant may only be installed outdoors.
•
In order to ensure adequate ventilation to units with R32 charge, it is important that ducts are as indicated in chapter 2.2.14,
making sure that the inverted operation vane of the delivery damper is excluded from the aeraulic duct.
•
The unit contains pressurized refrigerant gas. The pressurised equipment must not be touched except during maintenance,
which must be entrusted to qualified and authorised personnel.
•
Connect up the utilities to the unit following the indications set out in this manual and in the pictograms on the panelling of
the unit itself.
•
The water circuit contains harmful and bio-hazardous substances (e.g. legionella). Do not drink from the hydraulic circuit
and make sure the material contained in it does not touch your skin, eyes or clothing.
•
In order to avoid an environmental risk, make sure that any leaking fluid is collected in suitable devices in accordance with
local regulations.
•
If a part needs to be dismantled, make sure it is correctly re-assembled before starting the unit.
•
When the rules in force require the installation of fire-fighting systems near the machine, check that these are suitable for
extinguishing fires on electrical equipment, and in the presence of compressor lubricant oil or refrigerant. As indicated in
the material safety data sheets of these fluids (for example a CO
•
If the unit is equipped with overpressure release devices (safety valves), if these devices are activated, the refrigerant gas
is released at high temperature/speed. Prevent the jet of gas released from injuring people or damaging property.
If necessary, channel the discharges appropriately, according to the provisions of the EN 378-3 standard and the current
local regulations in force, making sure to discharge to open and safe places any fluids belonging to a safety group other
than A1 (see table 3).
•
Keep all the safety devices in good working order and check them periodically according to the regulations in force.
•
Keep all lubricants in suitably marked containers.
•
Do not store inflammable liquids near the unit.
•
Only carry out brazing or welding activities on clean and empty pipes, without lubricant oil residues. Do not bring flames or
other sources of heat near pipes containing refrigerating liquid.
•
Do not use naked flames near the unit.
•
The machinery must be installed in structures protected against atmospheric discharge according to the applicable laws
and technical standards.
•
Do not bend or hit pipes containing pressurised fluids.
•
It is not permitted to walk or rest other objects on the machines.
•
The user is responsible for overall evaluation of the risk of fire in the place of installation (for example, calculation of the fire
load).
•
During transport, always secure the unit to the bed of the vehicle to prevent it from moving about and overturning.
•
The machine must be transported according to the regulations in force taking into account the characteristics of the fluids
in the machine and the description of these on the safety data sheet.
•
Inappropriate transport can cause damage to the machine and leaking of the cooling fluid. Before start-up, the machine
must be checked for leaks and repaired accordingly.
•
The accidental release of refrigerant in an enclosed area can cause lack of oxygen, and therefore a risk of asphyxiation.
Install the machine in a suitably ventilated area, in accordance with the EN 378-3 standard and local regulations.
•
The installation must comply with the requirements of EN 378-3 and the local regulations in force; in the case of installations
indoors, good ventilation must be guaranteed and refrigerant detectors must be fitted when necessary.
•
Unless arranged otherwise with MEHITS, the machine be installed in environments where there is no risk of explosion
(SAFE AREA).
•
The structure of the unit is not designed to withstand the stresses (accelerations) caused by an earthquake.
In accordance with the standard EN 60204-1, the handle of the circuit breaker must be easy to access and at a height of between
0.6 and 1.9 metres above the floor.
The positioning of the machine in the place of installation must be considered, as if the unit is placed on a raised platform, the height
of the switch might no longer be in compliance with the standards. In which case the installer must arrange for a walkway or a similar
solution that can allow operators to access the safety device with ease.
extinguisher).
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