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GB 25131-2010: Safety requirements for water chillers (heat pump) using the vapor compression cycle Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB 25131-2010: Safety requirements for water chillers (heat pump) using the vapor compression cycle---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB25131-2010 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.200 J 73 Safety requirements for water chillers (heat pump) using the vapor compression cycle Issued on. SEPTEMBER 26, 2010 Implemented on. JUNE 01, 2011 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 List of hazards... 5 4 Safety requirements... 6 5 Determination for safety requirements... 13 6 Use information... 19ForewordClauses 3, 4, 5 and 6 of this Standard are mandatory; the rest are recommendatory. This Standard was proposed by China Machinery Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee on Refrigerated Air Conditioning Equipment of Standardization Administration of China (SAC/TC 238). Main drafting organizations of this Standard. Hefei General Machinery Research Institute, Zhejiang Haibin Construction Group Co., Ltd., Guangdong Jirong Air Conditioning Equipment Co., Ltd., Nanjing Tianjia Air Conditioning Equipment Co., Ltd., Guangdong Midea Commercial Air Conditioning Equipment Co., Ltd., Hangzhou Jinjiang Bailang New Energy Co., Ltd. The drafting organizations of this Standard. Shenzhen McQuay Air Conditioning Co. Ltd., Yantai Ice Wheel Co., Ltd., Ningbo Oaks Electric Co., Ltd., Shanghai Yikang Kaili Air Conditioning Equipment Co., Ltd., Qingdao Haier Air Conditioning Electronics Co., Ltd., York (Wuxi) Air Conditioning Refrigeration Equipment Co., Ltd., Chongqing Midea General Refrigeration Equipment Co., Ltd., Trane Air Conditioning System (China) Co., Ltd., Daikin Air Conditioning (Shanghai) Co., Ltd. Main drafters of this Standard. Zhang Mingsheng, Zhu Zhentao, Hang Guotao, Zhao Xun, Liang Lujun, Tian Mingli, Fang Jianjun, Hu Qinghong, Zhou Hongjun, Gao Weili, Jiang Chunyu, Tang Chengzhong, Xu Feng, Hu Xianghua, Yuan Shengyong, Zhang Weijia, Shi Jianchun. This Standard shall be interpreted by National Technical Committee on Refrigerated Air Conditioning Equipment of Standardization Administration of China. This Standard is developed for the first time. Safety requirements for water chillers (heat pump) using the vapor compression cycle1 ScopeThis Standard specifies safety requirements and determination for water chiller (heat pump) set (hereinafter referred to as “the set”). This Standard is applicable to motor-driven water chiller (heat pump) set using the vapor compression cycle. Other liquid chiller sets can also refer to this Standard for implementation.2 Normative referencesThe provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB 4208-2008, Degrees of protection provided by enclosure (IP code) (IEC 60529.2001, IDT) GB 4343.1, Electromagnetic compatibility requirements for household appliances, electric tools and similar apparatus - Part 1.Emission (GB 4343.1-2009, IEC/ISPR 14-1.2005, IDT) GB 4706.1-2005, Household and Similar Electrical Appliances - Safety - Part 1.General Requirements (IEC 60335-1.2001, IDT) GB/T 5013.4, Rubber insulated cables of rated voltages up to and including 450/750V - Part 4.Cords and flexible cables (GB 5013.4-2008, IEC 60245- 4.2004, IDT)3 List of hazardsSee Table A.1 for hazardous factors of the set.4 Safety requirements4.1 General requirements It shall design and manufacture the set for the hazards in Table 1 to ensure that the set shall not cause a hazard to personnel, property and the environment during normal use. 4.2 Stability and mechanical strength of the set 4.3 Structure and safety protective device 4.3.1 For outdoor air chiller set, its shell moisture-protection requirements are classified according to GB 4208, at least be IPX4. 4.3.2 When the outdoor unit of the set is exposed to rain or snow frost, it shall not cause danger to electrical parts. 4.3.3 The set shall not have rough or sharp edges and exposed tips that can pose a hazard to user during normal use or maintenance period. 4.3.7 When overcurrent, overload or other parameters (such as pressure, temperature, etc.) exceed the specified range, it shall set safety protective devise such as overcurrent, overload protector or various controllers. The set shall at least set. 4.3.8 For the set that the cooling capability is greater than 150kW, it shall install an emergency stop device. The emergency stop device shall be set in a position that is obvious and easy to distinguish and operate. When the manipulator of the emergency stop device is reset, the set can only be started automatically when automatic start is allowed. 4.3.9 When the set is started and operating as normal, it shall have accurate and reliable signal display. 4.3.10 When the set has failures such as overload or high-pressure, low- pressure as well as high-temperature, low-temperature exceeding the limit values, it shall be able to alarm or stop. 4.3.11 The control system of the set shall be set with water flow interrupting interlock protection. When a current interruption fault occurs, it shall be able to alarm and stop. 4.4 Electrical equipment 4.4.1 Protection against electric shock 4.4.2 Insulation resistance The insulation resistance between the electrified part of the set and the non- electrified part that might be grounded, when the rated voltage single-phase AC is 220V, three-phase AC is 380V, shall not be less than 2MΩ. When the rated voltage three-phase AC is 3000V, 6000V, it shall not be less than 5MΩ. When the rated voltage three-phase AC is 10000V, it shall not be less than 10MΩ. 4.4.3 Withstand voltage After the insulation resistance test, when the test voltage specified in 5.4.3 is applied between the electrified part and the non-electrified part of the set, there shall be no breakdown and flashover. 4.4.6 Internal wiring 4.4.6.1 The internal wiring of the set shall be smooth, without sharp edges. The wiring shall be protected from the contact with burrs, heat exchanger fins, so as to avoid the damage to wiring insulation. 4.4.7 Wiring terminals for power connection and external leads 4.4.7.1 The set of which rated voltage is under 600V uses single power supply mode. If other power supplies are required for some parts (such as electronic circuit) of electrical equipment, these power supplies shall be taken from components (such as transformer) that are part of the set’s electrical equipment. For the set of which its compressor uses a high-voltage generator that its rated voltage is above 3000V, it shall need different high-, low- voltage introducing power supply. The connection shall comply with relevant provisions. 4.4.7.9 The set shall be connected to an external protective grounding system or external protective conductor, according to the distribution system and related installation standards. The terminal of this connection shall be placed in the vicinity of the relevant phase line terminal of each incoming power supply. This terminal shall be sized to be connected to an external copper protective conductor of the cross-sectional area specified in Table 3. 4.6 Pressure vessel 4.6.1 The design, manufacture, mark and test of pressure vessel are in accordance with JB/T 4750. 4.6.2 The pressure vessel that can store liquid refrigerant and can be isolated from other components of the refrigeration system shall use safety relief device for overpressure protection. The pressure relief device is in accordance with the relevant provisions of 5.3.2 in GB 9237-2001. 4.7 Material 4.7.1 The steel materials, non-ferrous metals, alloys and non-metal materials used in the set shall be in accordance with the relevant provisions of 5.2 in GB 9237-12000. 4.7.2 The insulation materials used shall be flame retardant, non-toxic, odorless. The binder shall be non-toxic. The pasting or fixing shall be firm. 4.8 Refrigerant and lubricant Refrigerant classification is in accordance with the provisions of 4.3 in GB 9237- 2001. 4.8.1 Refrigerant and lubricant charge 4.8.2 Discharge of refrigerant vapor 4.8.2.1 The set shall avoid refrigerant leakage. 4.8.2.2 The refrigerant extracted from the set can only be injected into the qualified liquid storage bottle. Except that the refrigerant is discharged due to allowable small leakage, non-condensable gas emission, oil drain or other accidents, refrigerant shall not be discharged into the atmosphere or sewers, rivers, lakes, etc. 4.8.2.3 The engine room shall be well ventilated to prevent accidental leakage of refrigerant and suffocation or explosion hazard. 4.9 Test operation and maintenance 4.9.1 Test operation 4.9.2 Maintenance 4.9.2.1 Eat set shall be managed and repaired according to its size and type. Operators shall receive adequate training. 4.9.2.2 When adding or replacing refrigerants, pay full attention to the contents of the cylinder so as to avoid accidental explosion or other accidents caused by unqualified substances.5 Determination for safety requirements5.1 General requirements Take corresponding measures to ensure that the requirements of 4.1 are fully focused. 5.2 Stability and mechanical strength of the set 5.3 Structure and safety protective device 5.3.1 Respectively perform tests according to Clause 12 or Clause 14 requirements in GB 4208-2008 and corresponding provisions. 5.3.2 For the provisions of 4.3.2, check according to the requirements of 5.4.5 and corresponding provisions. 5.3.3 For the provisions of 4.3.3, perform visual inspection to determine whether it is accepted. 5.3.4 For the provisions of 4.3.4, perform visual inspection and manual test to determine whether it is accepted. 5.3.5 For the provisions of 4.3.5, perform visual inspection and manual test to determine whether it is accepted. 5.3.6 Check that the protective shield or cover of the coupling and fan impeller (plate) shall be fixed (must use tools with fasteners to install and remove). Firmly install. 5.4.6 Internal wiring 5.4.6.1 Determine whether the provisions on internal wiring slot and wiring are accepted through visual inspection. 5.4.6.2 Determine whether the provisions on metal hose or metal hole that the internal part passes through insulated wire are accepted through visual inspection. 5.4.6.3 Determine whether the provisions of 4.4.6.3 are accepted through visual inspection. 5.4.6.4 Determine whether the provisions on use and connection of yellow/green two-color wire are accepted through visual inspection. 5.4.6.5 Determine whether the provisions of 4.4.6.5 are accepted through visual inspection. 5.9 Test operation and maintenance 5.9.1 Test operation 5.9.1.1 Perform air tightness test, vacuum test and hydraulic test on the water side of the set according to the test methods specified in relevant standard provisions. The test results shall comply with the provisions of relevant standards. 5.9.1.2 When performing air tightness test of the set, it shall carefully check the color mark on the outside of the cylinder. And inspect outside in accordance with relevant provisions. Use it when it is confirmed not oxygen, any combustible gas or combustible gas mixture (except inflating directly with an air compressor). 5.9.2 Maintenance Maintenance and repair of the set are in accordance with relevant provisions of 7.1.3 and 7.1.4 in GB 9237-2001.6 Use informationUse information of the set consists of text, chart, mark, signal or symbol. It is a part of the set supply. Use information provided by the set manufacturer shall meet requirements of 6.1 in GB/T 15706.2-2007. The set’s use information is configured on the set itself (such as signals, warning devices, signs, nameplates, etc.) and accompanying files (especially in the instruction manual). 6.2 Marks, symbols, text warnings Marks, symbols, text warnings shall meet relevant requirements of 6.4 in GB/T 15706.2-2007.Marks shall at least contain. 6.3 Installation and instruction manual 6.4 Repair instruction manual The set’s technical documentation shall include a repair instruction manual that describes adjustment, maintenance, preventive inspection and repair methods in details. Relevant suggestion of repair record shall be a part of the instruction manual. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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