GB 25131-2010 PDF English
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| GB 25131-2010 | English | 150 |
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Safety requirements for water chillers (heat pump) using the vapor compression cycle
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GB 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 Contents
Foreword... 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... 19
Foreword
Clauses 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 cycle
1 Scope
This 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 references
The 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 hazards
See Table A.1 for hazardous factors of the set.
4 Safety requirements
4.1 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 requirements
5.1 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 information
Use 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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