EnergySafe Magazine Summer 2019, issue 56 - Page 22

Gas news AS4575: 2019 By Enzo Alfonsetti, Manager, Type A Gas Appliance & Component Safety The scope of the standard focuses on the minimum requirements for Type A appliance servicing, repair, conversion from one gas type to another, testing for safe and correct operation, in addition to associated quality systems. AS4575:2019 covers the following: » competency » preparation to work including site familiarisation and OH&S risk assessment » electrical safety » appliance inspection » steps to take when encountering unsafe appliances or installations » equipment requirements » general servicing requirements » replacement or repair of components » gas type conversion; and » testing for spillage of combustion products. Much of the focus in the revision of AS4575 was on the development of a test procedure to test for spillage of combustion products. The procedure was initially based upon Appendix R in the gas installation standard AS/NZS5601.1. Field experience, however, demonstrated that climatic conditions such as wind gusts or extreme hot weather can impact on the outcome of testing.Therefore, methodology to establish baseline conditions was introduced. As a result, Appendix R in AS/NZS5601.1 is currently being amended to also include this additional methodology. AS4575:2019 is currently a voluntary standard as it is not referenced in Victorian legislation. Consideration will be given to referencing AS4575 through an amendment to the Gas Safety (Gas Installation) Regulations 2018. In the meantime, it would be considered good practice to use AS4575:2019 as a reference document when undertaking any servicing work on Type A gas appliances. Search for the standard on Standards Australia and purchase it via SAI Global or Techstreet. 22 Summer 2019 energysafe issue 56 Clearances to overhead grease filters By Doug Rennie, Gas Safety Officer Clearances to overhead grease filters in commercial kitchen installations are an ongoing problem when it comes to installation acceptance. However, there are a number of ways to achieve compliant clearances between commercial catering equipment and extraction canopy grease filters. The best solution is to provide the required clearance between any part of the grease filter and the appliance’s cooking surface by raising the height of the canopy. If this isn’t possible, then modifications to the appliance installation or canopy may be required. Canopy modifications may include the installation of metal blanking plates or smaller grease filters. Always remember, modifications to the canopy can only be carried out by the canopy manufacturer or a person authorised by the canopy manufacturer to install or modify the canopy to the manufacturer’s design, which may be a licensed plumber. From 1 March 2020, if the canopy is new you will also require a letter from the canopy manufacturer (or a person authorised by the manufacturer to install, commission or modify the canopy) to the manufacturer’s design to the installation address stating the modification has not affected the canopy’s compliance within the Australian Standard for canopy approval e.g. AS1668. Note: existing canopies are exempt from this requirement. The letter will need to be on the canopy manufacturer’s or the authorised person’s letterhead and submitted as part of a new gas application, or as supporting documentation to resolve a non-compliance. Any modification must be permanent. This means the canopy cannot be returned to its original non-compliant state by means of cleaning or exchanging filters. Don’t forget – the clearance from a grease filter is a zero tolerance non- compliance, and will result in an infringement notice if detected. For more information refer to Gas Information Sheet 62: Clearances to overhead grease filters and acceptable means to comply.