REFRIGERANTS AND REFRIGERATING SYSTEMS - NEW STANDARDS

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Superseded Standards

AS/NZS 1677.1:1998 Refrigerating systems - Refrigerant classification

AS/NZS 1677.2:1998 Refrigerating systems - Safety requirements for fixed applications


New Standards

AS/NZS ISO 817:2016 Refrigerants - Designation and safety classification

 

AS/NZS 5149.1:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Definitions, classification and selection criteria

AS/NZS 5149.2:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Design, construction, testing, marking and documentation

AS/NZS 5149.3:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Installation site

AS/NZS 5149.4:2016 Refrigerating systems and heat pumps - Safety and environmental requirements - Operation, maintenance, repair and recovery


Equivalence

With five Standards replacing two the relationship between old and new is quite complex, further complicated by the commonalities between AS/NZS ISO 817 and AS/NZS 5149.1. The following outlines cover the major points.


AS/NZS ISO 817

Supersedes AS/NZS 1677.1 (overlaps with AS/NZS 5149.1), and provides a clear system for assigning designations to refrigerants. To these it assigns safety classifications based on toxicity and flammability. It also provides a means of determining the refrigerant concentration limits


AS/NZS 5149.1

Supersedes in part AS/NZS 1677.1 and AS/NZS 1677.2 (overlaps with AS/NZS ISO 817).

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.


AS/NZS 5149.2

Supersedes in part AS/NZS 1677.2.

This Standard is applicable to the design, construction and installation of refrigerating systems including piping, components, materials and ancillary equipment directly associated with such systems. It also specifies requirements for testing, commissioning, marking and documentation. Requirements for secondary heat-transfer circuits are excluded except for any safety devices associated with the refrigerating system.


AS/NZS 5149.3

Supersedes in part AS/NZS 1677.2.

This Standard is applicable to the site installation (plant space and services). It specifies requirements for site safety, which could be needed because of, but not directly connected with, the refrigerating system and its ancillary components. This is applicable to new refrigerating systems, extensions or modifications of existing systems and for used systems being transferred to and operated on another site. It is also applies in the case of the conversion of a system for another refrigerant.


AS/NZS 5149.4

Supersedes in part AS/NZS 1677.2.

This Standard specifies requirements for safety and environmental aspects in relation to operation, maintenance and repair of refrigerating systems and the recovery, reuse and disposal of all types of refrigerant, refrigerant oil, heat transfer fluid, refrigerating system and part thereof.  These requirements are intended to minimise risks of injury to persons and damage to property and the environment resulting from improper handling of the refrigerants or from contaminants leading to system breakdown and resultant emission of the refrigerant.


Masterspec

Masterspec has updated references to the old AS/NZS 1677 Standards to reflect the new Standards.

Masterspec Services sections updated include:

  • 7600 MECHANICAL - COMMON REQUIREMENTS
  • 7611 CHILLERS
  • 7621 PACKAGED AIR-CONDITIONING
  • 7628 VRF AIR-CONDITIONING SYSTEM
  • 7681 AUTOMATIC CONTROLS MECHANICAL


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