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AS/NZS 5149.1:2016

[Current]

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.
Published: 19/10/2016
Pages: 45
Table of contents
Cited references
Content history
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
A.5.2.4 Effect of flow down
Annex B
Annex C
C.1 General
Annex D
D.1 General
Bibliography
Amendment 1
Correction of QLAV. QLMV
Defined terms 3.10.3 and 3.10.4
Clause A.5.2.1
Appendix ZZ
ZZ.1 Scope
ZZ.2 Variations
Appendix ZA
ZA1 General
ZA2 Example scenario 1
ZA2.1 General
ZA2.2 Installation example
ZA2.3 Procedure
ZA3 Example scenario 2
ZA3.1 General
ZA3.2 Installation example
ZA3.3 Procedure
ZA4 Example scenario 3
ZA4.1 General
ZA4.2 Installation example
ZA4.3 Procedure
ZA5 Example scenario 4
ZA5.1 General
ZA5.2 Installation example
ZA5.3 Procedure
ZA6 Example scenario 5
ZA6.1 General
ZA6.2 Installation example
ZA6.3 Procedure
ZA7 Example scenario  6
ZA7.1 General
ZA7.2 Installation example
ZA7.3 Procedure
ZA8 Example scenario 7
ZA8.1 General
ZA8.2 Installation example
ZA8.3 Procedure
ZA9 Bibliography
Appendix ZB
Amendment control sheet
Amendment No. 1 (2018)
Revised text
Amendment No. 2 (2018)
Revised TEXT
Cited references in this standard
[Current]
Refrigerants - Designation and safety classification
[Current]
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 2: Design, construction, testing, marking and documentation
[Current]
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3: Installation site
Content history
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