ÖNORM EN 378-2

This Part 2 of the European Standard is applicable to the design and construction of refrigerating systems and the components and materials used including piping. It also specifies requirements for testing, commissioning, marking and documentation. NOTE: The classification of refrigerants as defined in Directive 97/23/EC and the associated technical requirements of pressure equipment are listed in the European standard on "Pressure equipment for refrigerating systems and heat pumps Part 1: Vessels General requirements" which is in preparation, see informative annex E. Certain clauses and subclauses of this Part 2 are not applicable to unit systems and self-contained systems which operate with charges of refrigerant up to 10,0 kg of group L1 refrigerant, 2,5 kg of group L2 refrigerant, and 1,0 kg of group L3 refrigerant. These clauses and subclauses are: 5.2; clause 6; 7.4.3.1; 7.4.3.3; 7.5;9.1.1; 9.1.2; 9.2; 9.3; 9.4.3.3; 9.4.3.4; 9.4.3.5; 9.5.1; 9.5.2; 9.5.3; 9.5.6; 10.1.2; 10.3; 10.5; 10.6. NOTE: Other clauses and subclauses may or may not apply, but in each case consideration of the system details in conjunction with the text will make it clear whether they apply or not. Some clauses and subclauses are not applicable to systems built on site with refrigerant charges up to 2,5 kg of group L1 refrigerant, 1,5 kg of group L2 refrigerant, and 1,0 kg of group L3 refrigerant. These clauses are: 6.5.2.2 and clause 11. Some unit systems and self-contained systems have maximum allowable pressures separately specified for the high and low pressure sides. In such cases, if it is not possible to separate the high and low pressure sides after the unit has been assembled, any further testing of the system can be carried out at pressures not more than the allowable pressure of the low pressure side. For particular classes or types of appliances in quantity production certain tests included in this Part 2 of the Europ (...abbreviated)