
Page 82.2.6 No ignition sourcesNo person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repair, removal and disposal, during which flammable refrigerant can possibly be released into the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed. 2.2.7 Ventilated areaEnsure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere. 2.2.8 Checks to the refrigeration equipmentWhere electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times, the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer’s technical department for assistance.The following checks shall be applied to installations using flammable refrigerants:– The charge size is in accordance with the room size within which the refrigerant-containing parts are installed;– The ventilation machinery and outlets are operating adequately and are not obstructed;– If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant;– Marking the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected;– Refrigeration pipes or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant-containing components unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.