18
Installing the unit
Preparation of fire extinguisher
f
If a hot work is to be done, an appropriate fire extinguishing equipment should have been available.
f
A dry powder or CO2 fire extinguisher shall be equipped near the charging area.
Ignition sources free
f
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).
f
The service engineers shall not use any ignition sources with the risk of fire or explosion.
f
Potential ignition sources shall be kept away from the work area where the flammable refrigerant can possibly be
released to the surrounding.
f
The work area should be checked to ensure that there are no flammable hazards or ignition risks. The “No Smoking” sign
shall be attached.
f
Under no circumstances shall potential sources of ignition be used while in detection of leakage.
f
Make sure that the seals or sealing materials have not degraded.
f
Safe parts are the ones with which the worker can work in a flammable atmosphere. Other parts may result in ignition
due to leakage.
f
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
f
Make sure that the work area is well ventilated before performing a hot work.
f
Ventilation shall be made even during the work.
f
The ventilation should safely disperse any released gases and preferably expel them into the atmosphere.
f
Ventilation shall be made even during the work.
Leakage detection methods
f
The leakage detector shall be calibrated in a refrigerant-free area.
f
Make sure that the detector is not a potential source of ignition.
f
The leakage detector shall be set to the LFL (lower flammability limit).
f
The use of detergents containing chlorine shall be avoided for cleaning because the chlorine may react with the
refrigerant and corrode the pipings.
f
If leakage is suspected, naked flames shall be removed.
f
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.
f
The work area shall be checked with an appropriate refrigerant detector before and during work.
f
Ensure that the leakage detector is appropriate for use with flammable refrigerants.
