GB/T 38603-2020 English PDF (GBT38603-2020)

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GB/T 38603-2020: Safety and control devices for gas burners and gas-burning appliances -- Particular requirements -- Electronic controller
GB/T 38603-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140
P 45
Safety and control devices for gas burners and gas-
burning appliances - Particular requirements -
Electronic controller
ISSUED ON: MARCH 31, 2020
IMPLEMENTED ON: FEBRUARY 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
3.1 Combustion control ... 6 
3.2 Circuit structure ... 9 
4 Categories... 10 
5 Structure ... 11 
5.1 Protection provided by the enclosure ... 11 
5.2 Structure design of controller ... 11 
5.3 Circuit structure of internal fault protection ... 12 
6 Requirements ... 12 
6.1 Function ... 12 
6.2 Thermal stress ... 13 
6.3 Continuous operation performance ... 13 
6.4 Internal fault protection ... 13 
6.5 Safety of electrical components ... 14 
6.6 EMC safety ... 14 
6.7 Battery-powered controller ... 14 
7 Test method ... 14 
7.1 Test conditions and allowable errors ... 14 
7.2 Function test ... 15 
7.3 Thermal stress test ... 15 
7.4 Continuous operation performance test ... 16 
7.5 Internal fault protection test ... 16 
8 Inspection rules ... 16 
8.1 Exit-factory inspection ... 16 
8.2 Type inspection ... 17 
9 Signs, installation and operating instructions ... 20 
9.1 Signs ... 20 
9.2 Installation and operating instructions ... 20 
9.3 Warning notice ... 21 
10 Packaging, transportation, storage ... 21 
Appendix A (Informative) Correspondence of clauses supporting basic
requirements of GB 16914-2012 in this standard ... 22 
Appendix B (Normative) Combustion control function module ... 24 
Appendix C (Normative) Emission function module of combustion product ... 29 
Appendix D (Normative) Reset function module ... 32 
Appendix E (Normative) Gas cut-off function module ... 35 
Appendix F (Normative) Temperature control function module ... 37 
Appendix G (Normative) Failure control technology and measures for functional
safety-related systems ... 40 
Appendix H (Normative) EMC safety ... 41 
Appendix I (Normative) Battery-powered controller ... 43 
Appendix J (Normative) Failure modes of electrical/electronic components .. 46 
References ... 49 
   
Safety and control devices for gas burners and gas-
burning appliances - Particular requirements -
Electronic controller
1 Scope
This standard specifies the terms and definitions, classification, structure,
requirements, test methods, inspection rules, marking, installation and
operating instructions, packaging, transportation and storage, of the electronic
controllers for gas burners and gas-burning appliances, which are used for city
gas, as specified in GB/T 13611.
This standard applies to the electronic controllers for gas burners and gas-
burning appliances, of the gas water heaters, gas heating water heaters, gas
burners/machines, gas steam generators, gas boilers, gas stoves and other
combustion appliances, which have automatic combustion control functions.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 4208 Degrees of protection provided by enclosure(IP code)
GB/T 6346.14 Fixed capacitors for use in electronic equipment - Part 14:
Sectional specification - Fixed capacitors for electromagnetic interference
suppression and connection to the supply mains
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 (available for certification)
5 Structure
5.1 Protection provided by the enclosure
5.1.1 When the controller is installed and used in the manner, which is declared
by the manufacturer, it shall have a degree of protection, which is suitable for
its use.
5.1.2 When the controller is used on a gas-burning appliance, it is protected by
the gas-burning appliance.
5.1.3 When the controller is used barely in atmosphere, the degree of protection
shall not be lower than IP54, which is specified in GB/T 4208.
5.2 Structure design of controller
5.2.1 The structural appearance requirements of the controller shall comply with
the provisions of Chapter 11 of GB/T 14536.6-2008.
5.2.2 When the controller has two or more control functions, it shall meet the
following requirements:
a) The functional safety level of the controller shall be the same as the
highest safety level of a single function;
b) Any failure of any function shall not affect the safe operation of other
control functions;
c) Each function of the controller system shall meet the same continuous
operation performance requirements, as a single control function module.
5.2.3 When the controller is composed of two or more functional modules, it
shall meet the following requirements:
a) When combining various functional modules, it shall avoid mutual
interference;
b) When the functional module of the controller is connected to the gas-
burning appliance, it shall not affect the functional safety of the control
device;
c) When incorporating the controller and control device into the overall
control system design of the appliance, it shall declare the safety critical
parameters of the entire controller system.
5.3 Circuit structure of internal fault protection
5.3.1 Circuit structure of category A controller
Category A controllers have no circuit structure requirements for internal fault
protection.
5.3.2 Circuit structure of category B controller
The circuit structure of the category B controller shall at least conform to one of
the following structures:
a) Single-channel structure with function detection;
b) Single-channel structure with periodic self-test;
c) Dual-channel structure without comparison.
5.3.3 Circuit structure of category C controller
5.3.3.1 The circuit structure of category C controller shall at least conform to
one of the following structures:
a) Single-channel structure with periodic self-test and monitoring;
b) Dual-channel structure with comparison (homogenous);
c) Dual-channel structure with comparison (diverse).
5.3.3.2 The comparison between dual-channel structures can be achieved, in
the following ways:
a) By using a comparator;
b) By mutual comparison.
6 Requirements
6.1 Function
When the controller is designed according to function, it can be divided into the
following functional modules; each module shall meet the requirements of
Appendix B ~ Appendix F:
a) Combustion control function module;
Category B controller shall have self-protection function, under the
condition of single independent fault. When testing according to the test
method of 7.5.1, the second independent fault is not considered. The
failure of the controller shall be controlled, in accordance with the
provisions of Appendix G.
c) Category C controller
Category ...