Automatic gas burners. Specification for packaged burners with input rating 7.5 kW up to but excluding 60 kW|3rd family gases, Verification, Control systems, Domestic, Ratings, Instructions for use, Gas pipes, Electric power systems, Marking, Heat engineering components, Automatic control systems, Burners, Commissioning, Type testing, 1st family gases, Performance, Fire safety, Safety devices, Forced-draught burners, Performance testing, Rated power, Pipework systems, Testing conditions, 2nd family gases, Gas-powered devices