Electronic gas/air ratio adjustment devices for household gas appliances
1 Scope
This standard specifies the terms, definitions and abbreviations, construction and materials, requirements, test methods, inspection rules, marking, installation and operating instructions, packaging, transportation and storage of electronic gas/air ratio adjustment devices for household gas appliances.
This standard is applicable to the electronic gas/air ratio adjustment devices for household gas appliances with maximum working pressure below 10 kPa, nominal diameter not more than DN 50, used for urban gas appliances specified in GB/T 13611 and closed-loop control, which can be tested separately or as components of gas appliances (or burners).
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 1019-2008 General requirements for the package of household and similar electrical appliances
GB/T 2423.10 Environmental testing for electric and electronic products - Part 2: Tests methods - Test Fc: Vibration (sinusoidal) (GB/T 2423.10-2008, IEC 60068-2-6: 1995, IDT)
GB/T 4208 Degrees of protection provided by enclosure (IP code) (GB/T 4208-2008, IEC 60529: 2001, IDT)
GB/T 4857.3 Packaging - Basic tests for transport packages - Part 3: Stacking test methods using a static load (GB/T 4857.3-2008, ISO 2234: 2000, IDT)
GB/T 4857.5 Packaging - Transport packages - Vertical impact test method by dropping (GB/T 4857.5-1992, eqv ISO 2248: 1985)
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 1: Parallel internal and taper external threads (GB/T 7306.1-2000, eqv ISO 7-1: 1994)
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads - Part 2: Taper internal and external threads (GB/T 7306.2-2000, eqv ISO 7-1: 1994)
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads (GB/T 7307-2001, eqv ISO 228-1: 1994)
GB/T 9144 General purpose metric screw threads - Preferable plan (GB/T 9144-2003, ISO 262: 1998, MOD)
GB/T 12716 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads
GB/T 13611 Classification and basic characteristics of city gas
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 16411-2008 Universal test methods of gas burning appliances for domestic use
GB/T 17626.2 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Electrostatic discharge immunity test (GB/T 17626.2-2006, 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 17626.4-1998, IEC 61000-4-4: 1995, IDT)
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test (GB/T 17626.5-1999, IEC 61000-4-5: 1995, IDT)
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields (GB/T 17626.6-1998, IEC 61000-4-6: 1996, IDT)
GB/T 17626.8 Electromagnetic compatibility (EMC) - Part 8: 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 17626.11-1999, IEC 61000-4-11: 1994, IDT)
GB/T 20438
(all parts) Functional safety of electrical/electronic/programmable electronic safety-related systems (GB/T 20438-2006, IEC 61508: 1998, IDT)
CJ/T 222-2006 Quality assessment procedures and test rules for gas-burning appliances for domestic use
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3 Terms, definitions and abbreviations
For the purposes of this document, the terms and definitions given in GB 14536.1 (including Annex H.2), GB 14536.6 and the following apply.
3.1 Terms and definitions
3.1.1
electronic gas/air ratio adjustment devices
closed-loop modulating system consisting of the electronic control module, actuating elements for the gas flow and the air flow as a minimum, and allocated feedback signal(s) (see Figure 1)
3.1.2
electronic control module
electronic main control module incorporating all inputs and outputs for the controlling elements
3.1.3
defined state
state with one of the following characteristics:
a) the system passively assumes a state in which the signal available at the output terminals ensures a safe situation under all circumstances
b) the system actively executes a protective action causing it to shut down followed by a restart or a lock out
c) the system remains in operation, continuing to satisfy all safety-related functional requirements
3.1.4
fault reaction time
time between the occurrence of a fault and the reaching of a defined state
3.1.5
safety shut-down
de-energization of the main gas flow means as the result of the action of a limiter, a safety cut-out or the detection of an internal fault of the system
3.1.6
lock-out
process in which the system goes into one of the conditions described in 3.1.7 or 3.1.8
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3.1.7
non-volatile lock-out
safety shut-down condition of the system, such that a restart can be accomplished only by a manual reset of the system and by no other means
Foreword i
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 Construction and materials
4.1 General requirements
4.2 Construction
4.3 Materials
4.4 Gas connections
5 Requirements
5.1 General requirements
5.2 Component requirements
5.3 Performance requirements
5.4 Functional requirements
5.5 Endurance
5.6 Internal faults
5.7 Electrical safety and electro-magnetic compatibility (EMC)
6 Test methods
6.1 Test conditions
6.2 Component test
6.3 Performance test
6.4 Functional test
6.5 Endurance test
7 Inspection rules
7.1 General
7.2 End-of-manufacturing inspection
7.3 Type test
7.4 Nonconformity classification
7.5 Verification and evaluation
8 Marking, installation and operating instructions
8.1 Marking
8.2 Installation and operating instructions
8.3 Warning prompt
9 Packaging, transportation and storage
9.1 General
9.2 Packaging
9.3 Transportation
9.4 Storage
Annex A (Informative) Structural changes of this standard with respect to ISO 23552-1: 2007
Annex B (Informative) Technical differences between this standard and ISO 23552-1: 2007 and their justifications
Annex C (Normative) Special requirements for single position feedback potentiometers in electromechanical actuators
Annex D (Normative) Manufacturer's specification for technical parameters of sensors and actuators
Annex E (Normative) Electrical safety
Annex F (Normative) Requirements for EMC
Annex G (Informative) Air tightness test - volume method
Annex H (Informative) Clauses/subclauses of this standard that support the basic requirements of GB 16914-2003
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