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AS/NZS 5149.1:2016
$242.18
Refrigerating systems and heat pumps – Safety and environmental requirements, Part 1: Definitions, classification and selection criteria (ISO 5149-1:2014, MOD)
This Standard specifies the requirements for the safety of persons and property, provides guidance for the protection of the environment, and establishes procedures for the operation, maintenance, and repair of refrigerating systems and the recovery of refrigerants.
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Refrigerating system
3.2 Location
3.3 Pressure
3.4 Components of refrigerating system
3.5 Piping, joint, and fitting
3.6 Safety device
3.7 Fluid
3.8 Heat transfer circuit
3.9 Refrigerant disposal
3.10 Miscellaneous
4 Abbreviated terms
5 Classification
5.1 Occupancies classification
5.2 Systems classification
5.2.1 General
5.2.2 Direct releasable system
5.2.2.1 Direct systems
5.2.2.2 Open spray system
5.2.2.3 Direct ducted system
5.2.2.4 Open vented spray system
5.2.3 Indirect systems
5.2.3.1 Indirect closed system
5.2.3.2 Indirect vented system
5.2.3.3 Indirect vented closed system
5.2.3.4 Double indirect system
5.2.3.5 High-pressure indirect system
5.3 Location classification of refrigerating systems
5.3.1 General
5.3.2 Class IV: ventilated enclosures
5.3.3 Class III: machinery room or open air
5.3.4 Class II: compressors in machinery room or open air
5.3.5 Class I: mechanical equipment located within the occupied space
5.4 Refrigerant classification
6 Quantity of refrigerant per occupied space
6.1
6.2
7 Space volume calculations
7.1
7.2
7.3
7.4
7.5
7.6
8 Heat-transfer fluid
8.1 General
8.2 Ingestion
8.3 Water and soil contamination
8.4 Personal exposure (toxicity)
8.5 Pressure
8.6 Marking
8.7 Freezing point
8.8 Decomposition point
8.9 Flash point
8.10 Auto-ignition temperature
8.11 Thermal expansion
8.12 Corrosion protection
Annex A
A.1 General
A.2 Charge limit requirements for refrigerating systems
A.3 Factory-sealed appliances with a charge of less than 0,15 kg of A3 refrigerants
A.4 Charge limitations due to flammability for A/C systems or heat pumps for human comfort: refrigerant-containing parts in an occupied space
A.5 Alternative for risk management of refrigerating systems in occupied spaces
A.5.1 General
A.5.2 Allowable charge
A.5.2.1 General
A.5.2.2 Occupancies except ones on the lowest underground floor of the building
A.5.2.3 Occupancies on the lowest underground floor of the building
