Samsung AE RXYDEG Series Installation Manual page 18

Installing the unit
Preparation of fire extinguisher
If a hot work is to be done, an appropriate fire extinguishing equipment should have been available.
A dry powder or CO2 fire extinguisher shall be equipped near the charging area.
Ignition sources free
Make sure to store the units in a place without continuously operating ignition sources (for example, open flames, an
operating gas appliance or an operating electric heater).
The service engineers shall not use any ignition sources with the risk of fire or explosion.
Potential ignition sources shall be kept away from the work area where the flammable refrigerant can possibly be
released to the surrounding.
The work area should be checked to ensure that there are no flammable hazards or ignition risks. The "No Smoking" sign
shall be attached.
Under no circumstances shall potential sources of ignition be used while in detection of leakage.
Make sure that the seals or sealing materials have not degraded.
Safe parts are the ones with which the worker can work in a flammable atmosphere. Other parts may result in ignition
due to leakage.
Replace components only with parts specified by Samsung. Other parts may result in the ignition of refrigerant in the
atmosphere from a leak.
Area ventilation
Make sure that the work area is well ventilated before performing a hot work.
Ventilation shall be made even during the work.
The ventilation should safely disperse any released gases and preferably expel them into the atmosphere.
Ventilation shall be made even during the work.
Leakage detection methods
The leakage detector shall be calibrated in a refrigerant-free area.
Make sure that the detector is not a potential source of ignition.
The leakage detector shall be set to the LFL (lower flammability limit).
The use of detergents containing chlorine shall be avoided for cleaning because the chlorine may react with the
refrigerant and corrode the pipings.
If leakage is suspected, naked flames shall be removed.
If a leakage is found while in brazing, the entire refrigerant shall be recovered from the product or isolated (e.g. using
shut-off valves). It shall not be directly released to the environment. Oxygen free nitrogen (OFN) shall be used for purging
the system before and during the brazing process.
The work area shall be checked with an appropriate refrigerant detector before and during work.
Ensure that the leakage detector is appropriate for use with flammable refrigerants.
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