Immergas AUDAX PRO 4 V2 - Preparation of Fire Extinguisher; Free Ignition Sources; Ventilation of the Area; Leak Detection Methods

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4.3 PREPARATION OF FIRE EXTINGUISHER.
- If hot work needs to be carried out, prepare adequate re-ghting
equipment.
- Set up a dry powder or CO
2
extinguisher in the vicinity of the
charging area.
4.4 FREE IGNITION SOURCES.
- Make sure to store the units in a place without ignition sources
in continuous operation (for example naked ames, gas-red
appliances or electric stoves).
- Maintenance technicians must not use ignition sources that
generate the risk of re or explosion.
- Potential ignition sources must be kept away from the work
area where the ammable refrigerant could be released in the
surrounding environment.
- e work area must be controlled to make sure that there are
no ammable substance hazards or risks of ignition. A “No
smoking” sign must be axed.
- Under no circumstances must potential ignition sources be used
during leak detection.
- Make sure that the gaskets and sealing materials are not worn.
- Safe parts are those with which personnel can work in a am-
mable environment. Other parts can cause ignition due to leaks.
- Only replace the components with the parts specied by the
supplier. Other parts can cause ignition of refrigerant in the
environment due to leaks.
4.5 VENTILATION OF THE AREA.
- Make sure that the work area is well ventilated before performing
hot work.
- Ventilation must also be carried out during work.
- Ventilation must safely disperse all of the released gases and
preferably expel them into the atmosphere.
4.6 LEAK DETECTION METHODS.
- e leak detector must be calibrated in an environment without
refrigerant.
- Make sure that the detector is not a potential source of ignition.
- e leak detector must be set at LFL (lower ammability limit).
- Detergents containing chlorine must not be used for cleaning
as the chlorine can react with the refrigerant and corrode the
piping.
- Remove naked ames if you suspect any leaks.
- If the leak is detected during braze welding, all of the refrigerant
must be recovered from the product or isolated (for example
using shut-o valves). It must not be released directly into the
environment. Oxygen-free nitrogen (OFN) must be used to
purge the system before and during the braze welding process.
- e work area must be controlled with an appropriate refrigerant
liquid detector before and during work.
- Make sure that the leak detector is suitable to be used with
ammable refrigerants.
4.7 LABELLING.
- e parts must be labelled to guarantee that they have been
dismantled and refrigerant emptied.
- e labels must bear the date.
- Make sure that specic labels are applied on the system to inform
that it contains ammable refrigerant.