Detail of CJ/T 421-2013

Introduction of CJ/T 421-2013

Electronic controller of household gas burning appliances 1 Scope This standard specifies the terms and definitions, classification, structure, requirements, test methods, inspection rules, identification, installation and operation instructions, packaging, transport and storage of electronic controllers (hereinafter referred to as controllers) of household gas burning appliances using city gas as specified in GB/T 13611. This standard is applicable to the production and testing of electronic controllers of household gas burning appliances. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2008; ISO 780: 1997, MOD) GB/T 2828 (All parts) Sampling procedures for inspection by attributes GB 4706.1-2005 Household and similar electrical appliances - Safety - General requirements (IEC 60335-1: 2004 (Ed4.1), IDT) GB/T 13611 Classification and basic characteristics of city gas GB/T 14004 Fixed capacitors for use in electronic equipment - Part 6: Sectional specification - Fixed metallized polycarbonate film dielectric d.c. capacitors (for certification) (GB/T 14004-1992, idt IEC 60384-6: 1987) GB/T 14472 Fixed capacitors for use in electronic equipment - Part 6: Sectional specification - Fixed capacitors for electromagnetic interference suppression and connection to the supply mains (GB/T 14472-1998, idt IEC 60384-14: 1993) GB 14536.1-2008 Automatic electrical controls for household and similar use - Part 1: General requirements (IEC 60730-1: 2003 (Ed3.1), IDT) GB 14536.6-2008 Automatic electrical controls for household and similar use - Particular requirements for automatic electrical burner control systems (IEC 60730-2-5: 2004, IDT) GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test (GB/T17626.2 -2006, IEC 61000-4-2 : 2001, IDT) GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test (GB/T 17626.3-2006, IEC 61000-4-3: 2002, IDT) GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test (GB/T 17626.4-2008, IEC 61000-4-4: 2004, IDT) GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test (GB/T 17626.5-2008, IEC 61000-4-5: 2005, IDT) GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances induced by radio-frequency fields (GB/T 17626.6-2008, IEC 61000-4-6: 2006, IDT) GB/T 17626.8 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test (GB/T 17626.8-2006, IEC 61000-4-8: 2001, IDT) GB/T 17626.11 Electromagnetic compatibility - Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests (GB/T 17626.11-2008, IEC 61000-4-11: 2004, IDT) GB/T 17626.28 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Variation of power frequency immunity test (GB/T 17626.28-2006, IEC 61000-4-28: 2001, IDT) GB 18802.1 Low-voltage surge protective devices - Part 1: Surge protective devices connected to low-voltage power distribution systems - Requirements and tests (GB 18802.1-2011, IEC 61643-1: 2005, MOD) GB 19212.7 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 7: Particular requirements and test for safety isolating transformers and power supply units incorporating safety isolating transformers (GB 19212.7-2012, IEC 61558-2-6: 2009, IDT) GB/T 20438.2-2006 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems (IEC 61508-2: 2000, IDT) GB/T 20438.7-2006 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 7: Overview of techniques and measures (IEC 61508-7: 2000, IDT) 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 14536.1, GB/T 14536.6 and GB/T 20438.4 as well as the following apply. 3.1 Terms and definitions related to burning control 3.1.1 automatic burner control system a control system composed of the programmable control device or all elements of the non-programmable control device and the flame detection device, and able to issue control commands, control starting sequence, monitor burner operation and generate controlled shut-down; various functions of the automatic burner control system may be designed in one or more control blocks 3.1.2 ignition safety time the time interval from when the gas valve is turned on to when it is turned off for not detecting a flame signal 3.1.3 safety shut-down gas cut-off realized through limiter, safety cut-off device or system internal fault detection Note: It is revised with respect to GB 14536.6-2008, Definition 2.3.122. 3.1.4 defined state The controller fault shall enter a state featuring one of the following: a) the controller passively enters a state in which the gas is cut off; when the reason for entering the safe state no longer exists, it can only be restarted according to specific requirements;

Contents of CJ/T 421-2013

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification of the controllers 5 Structure 6 Requirements 7 Test methods 8 Inspection rules 9 Identification, installation and operation instructions 10 Packaging, transport and storage Annex A (Normative) Combustion control function blocks Annex B (Normative) Emission function block of combustion products Annex C (Normative) Reset function block Annex D (Normative) Gas cut-off function block Annex E (Normative) Temperature control function block Annex F (Normative) Technologies and measures for failure control of functional safety related system Annex G (Normative) Electromagnetic compatibility Annex H (Normative) Battery operated controller Annex I (Normative) Electrical/electronic component fault modes Annex J (Informative) Sub-clauses of this standard that support the basic requirements of GB 16914- Bibliography