standard byInternational Organization for Standardization , 02/01/2026
This document specifies safety, design, construction and performance requirements and testing for electronic fuel/air ratio control (FARC) systems. Systems can include sensors, mechanical actuators and motors/blowers that make up the complete system. Systems can be described as:
u000bu000bclosed loop fuel/air ratio control systems (ERC), see 3.1.1;u000bclosed loop fuel/air ratio trim systems (ERT), see 3.1.2;u000bfuel/air ratio supervision systems (ERS), see 3.2.u000bu000bNOTE1 Throughout this document, the word “system” means “FARC control and system components”.
u000bThese systems are intended for use with burners and appliances that burn gaseous or liquid fuels. This document describes the procedures for evaluating these requirements and specifies information necessary for installation and use.
u000bThis document applies to the inherent safety of the system, to the declared operating values, operating times and operating sequences if they are associated with FARC safety and to the testing of FARC systems used in, on or in association with appliances.
u000bNOTE2 The documents for burners, appliances or processes which use ERC, ERS or ERT can override the requirements of this document.
u000bThis document prescribes testing requirements in addition to the relevant standards for integrated devices or components(e.g. actuators)to ensure safe operation of the FARC system.
u000bIf no part 2 standards in ISO/TC 161, Controls and protective devices for gaseous and liquid fuels, or IEC/TC 72, Textile machinery and accessories, exist, then IEC 60730-1 is considered.
u000bNOTE3 Supplemental or modified requirements and tests and evaluations can be needed for ERC, ERS or ERT systems for conformance with relevant burner, appliance or process standards. Conformance of an ERC, ERS or ERT with this document does not imply that such systems or components thereof are acceptable for use on an appliance without supplemental tests of the control system applied to the particular appliance to meet the requirements of the relevant burner, appliance or process standard(s).
u000bThis document applies to electronic fuel/air ratio control systems that can be tested independently or as a system or as part of an appliance or as part of a burner.
u000bThis document does not cover burner control function like e.g. burner ignition, flame supervision and fuel shutoff.
