Type B Gasfitting (VIC) cheat sheet

Type B appliances are gas-consuming appliances with input exceeding 10 MJ/h that are not classified as Type A; Type A covers mass-produced appliances certified to an applicable standard and installed per the manufacturer's instructions.

Commissioning a Type B appliance requires verification of combustion CO/CO2 readings, gas pressure at the burner and at the appliance inlet, and flue draught or spillage, with results recorded against the appliance's rated input.

An appliance must not be commissioned unless the gas supply pressure at the appliance inlet is within the range stated on the appliance data plate or in the manufacturer's specifications.

Combustion air and flue requirements are determined from the appliance input rating and the installation category; ventilation openings for a Type B appliance are sized from the appliance's rated gas consumption, not from the connected load of the whole building.

A gas appliance must not be installed in a room or space unless ventilation and flueing comply with the applicable installation standard referenced by the Victorian gas installation framework, typically AS/NZS 5601.

For flued appliances, the flue terminal must be located clear of openings, windows, and air intakes per the clearance table in the installation standard; the measured clearance governs, not the drawing.

Over-pressure protection: a regulator or over-pressure shut-off device is required where the supply pressure could exceed the appliance's maximum rated pressure; the device must be set and tested before commissioning.

Leak testing after installation uses a pressure test on the new pipework with the test medium and duration specified for the pipe volume and pressure; the test result is recorded before gas is admitted to the appliance.

Conversion of a Type B appliance for a different gas family requires replacement or adjustment of injectors, governor spring, and aeration per the manufacturer's conversion kit, followed by re-commissioning and a new combustion analysis.

Gasfitting work in Victoria is regulated under the Gas Safety Act 1997 and the Gas Safety (Gas Installation) Regulations; ESV administers gas safety, licensing, and enforcement.

A person must hold, or work under the supervision of a person holding, the appropriate Victorian gasfitting licence or registration for the class of work performed; Type B work requires the specific endorsement or qualification for that class.

Type A appliance servicing is generally within the scope of a licensed gasfitter; Type B appliances require additional competence because of their input and complexity, and the licence class must match the work.

A Certificate of Compliance (gas) must be issued for gasfitting work on completion, in the form required, with a copy given to the consumer and records retained for the required period.

Notifiable work and prescribed work categories determine whether the work must be reported to ESV; the installer checks the current category list before starting, because scope changes between editions of the regulations.

Only a licensed gasfitter may disconnect or reconnect gas supply to an appliance; the gas distributor or retailer handles consumer billing matters and cannot authorise non-compliant installation work.

Continuing professional development and licence renewal are conditions of holding a Victorian gasfitting licence; practising on a lapsed licence is an offence regardless of competence.

Defect or non-compliance reporting: a gasfitter who identifies an unsafe installation must make it safe and report it as required; the duty is on the person who did the work and on any subsequent gasfitter who finds the defect.

Public liability and consumer protection obligations attach to gasfitting contracting; work must be performed to the relevant Australian Standards, and departure from a standard requires documented justification.