Carrier 42QZA009DS Series Installation Manual

Also see for 38QUS009DS: Owner's manual Installation manual Service manual Installation manual Installation manual

Contents

7.1 CHECKS TO THE AREAPrior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensurethat the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall becomplied with prior to conducting work on the system.7.2 WORK PROCEDUREWorks shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapourbeing present while the work is being performed.7.3 GENERAL WORK AREAAll mintenance staff and others working in the local area shall be instructed on the nature of work being carriedout. work in confined spaces shall be avoided. The area around the work space shall be sectioned off. Ensurethat the conditions within the area have been made safe by control of flammable material.7.4 CHECKING FOR PRESENCE OF REFRIGERANTThe area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure thetechnician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being usedis suitable for use with flammable refrigerants, i.e. no sparking, adequately sealed or intrinsically safe.7.5 PRESENCE OF FIRE EXTINGUISHERIf any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fireextinguishing equipment shall be available to hand. Have a dry power or CO2 fire extinguisher adjacent to thecharging area.7.6 NO IGNITION SOURCESNo person carrying out work in relation to a refrigeration system which involves exposing any pipe work thatcontains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it maylead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be keptsufficiently far away from the site of installation, repairing, removing and disposal, during which flammablerefrigerant can possibly be released to the surroungding space. Prior to work taking place, the area around theequipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “NO SMOKING”signs shall be displayed.7.7 VENTILATED AREAEnsure that the area is in the open or that it is adequately ventilated before breaking into the system or conduct-ing any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventila-tion should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.7.8 CHECKS TO THE REFRIGERATION EQUIPMENTWhere electrical components are being changed, they shall be fit for the purpose and to the correctspecification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubtconsult the manufacturer’s technical department for assistance. The following checks shall be applied toinstallations using flammable refrigerants:7. INFORMATION SERVICINGGB-15