GB/T 21362-2008 English PDF (GB/T21362-2008)

GB/T 21362-2008: Heat pump water heater for commercial and industrial and similar application
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GB/T 21362-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Heat pump water heater for commercial and
industrial and similar application
ISSUED ON. JANUARY 14, 2008
IMPLEMENTED ON. MAY 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Types and basic parameters ... 7 
5 Requirements ... 10 
6 Test methods ... 14 
7 Inspection rules ... 20 
8 Marking, packaging, storage and transportation ... 23 
Annex A (Informative) Preferred values of the nominal capacity, and nominal
heating capacity of the water heater’s water tank, and model preparation
method ... 25 
Annex B (Normative) Heating capacity test method for water heater
performance ... 27 
Foreword
The Annex B of this Standard is a normative annex, and Annex A is an
informative annex.
This Standard was proposed by the China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
for Standardization of Refrigeration and Air Conditioning Equipment (SAC/TC
238).
Main drafting organizations of this Standard. Guangzhou Zhongyu Air
Conditioning Technology Development Co., Ltd, Hefei General Machinery
Research Institute, Jiangsu Tenesun Electric Appliance Co., Ltd, GD Midea
Commercial Air-Conditioning Equipment Co., Ltd, Hefei Tongyong
Environmental Control Technology Co., Ltd.
Participating drafting organizations of this Standard. Dalian Bingshan Group
Co., Ltd, Chongqing Jiulongyun New Energy Development Co., Ltd, Beijing
Tongfang Clean Technology Co., Ltd, Guangzhou H’Stars Refrigeration
Machinery Manufacturing Co., Ltd, A.O. Smith (China) Water Heater Co., Ltd,
Zhejiang AMA Electronic and Electric Co., Ltd, Beijing Huaqing Rongli Air-
conditioning Technology Co., Ltd, Foshan Maxway Air-conditioning Technology
Co., Ltd, Lotus Air Conditioner (Jiangsu) Co., Ltd, Zhejiang Xingxing Central
Air-conditioning Equipment Co., Ltd, Tellhow Sci-tech Co., Ltd, Guangdong
Shenling Air-conditioning Equipment Co., Ltd, Shanghai Futian Air-conditioning
Equipment Co., Ltd, Emerson Environmental Optimization Technology (Suzhou)
R and D Co., Ltd, (Sino-foreign Joint Venture) Chuzhou Yangzi Betway Central Air-
conditioning Co., Ltd, Ningbo NBWAVE Thermal Energy Equipment Co., Ltd.
Main drafters of this Standard. Qin Zhicheng, Zhang Xiuping, Zhang Mingsheng,
Wang Tianshu, Shu Weimin, Li Bai.
Participating drafters of this Standard. Hao Qiaoli, Zhu Yong, Liu Yaobin, Yuan
Bohong, Qiu Bu, Ling Yongjun, Huang Guoqi, Qu Zhiqiang, Ding Wei, Sha
Fengqi, Huang Xiaoru, Yi Xinwen, Yao Honglei, Wen Maohua, Xie Yong, Wang
Lei, Zhong Yu, Wang Yujun, Wang Jiping.
This Standard shall be interpreted by the National Technical Committee for
Standardization of Refrigeration and Air Conditioning Equipment.
This Standard was first-time formulated.
Heat pump water heater for commercial and
industrial and similar application
1 Scope
This Standard specifies the terms and definitions, types and basic parameters,
requirements, test methods, inspection rules, marking, packaging, storage and
transportation of heat pump water heater for commercial and industrial and
similar application (hereinafter referred to as “water heater”).
This Standard is applicable to the motor-driven air-source and water-source
heat pump water heaters for hot water supply, with vapor compression
refrigeration cycle, and a nominal heating capacity of 3,000W or more. For the
heat pump water heaters for other purposes, it can also be used for reference.
2 Normative references
The provisions in the following documents become the provisions of this
Standard through reference in this Standard. For dated references, the
subsequent amendments (excluding corrections) 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 editions of these documents are
applicable. For undated references, the latest editions apply to this Standard.
GB/T 191 Packaging -- Pictorial marking for handling of goods (GB/T 191-
2000, eqv ISO 780.1997)
GB/T 1720 Method of test for adhesion of paint films
GB/T 2423.17 Basic environmental testing procedures for electric and
electronic products -- Test Ka. Salt mist (GB/T 2423.17-1999, eqv IEC
60068-2-11.1981)
GB/T 2828.1 Sampling procedures for inspection by attribute -- Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection (GB/T 2828.1-2003, ISO 2859.1999 IDT)
GB/T 6388 Transport package shipping mark
GB 8624 Classification for burning behavior of building materials and
products
GB/T 10870-2001 The methods of performance test for positive
displacement and centrifugal water-chilling units and heat pump
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical
product
GB/T 17758 Unitary air conditioners
GB/T 18430.1 Water chilling (heat pump) packages using the vapor
compression cycle -- Part 1. Water chilling (heat pump) packages for
industrial and commercial and similar application
JB/T 4330 Determination of noise emitted by refrigerating and air condition
JB/T 4750 Pressure vessels for refrigerant equipment
JB/T 7249 Terminology of refrigeration equipment
JB 8654 Safety requirements of positive displacement and centrifugal water-
chilling packages
3 Terms and definitions
The terms and definitions established by JB/T 7249 and the following ones are
applicable to this Standard.
3.1 Heat pump water heater
A motor-driven device that uses vapor compression refrigeration cycle to
transfer heat from a low-grade heat source (air or water) to heated water for
making hot water.
3.2 Air-source heat pump water heater
A heat pump water heater that uses air as the heat source.
3.3 Water-source heat pump water heater
A heat pump water heater that uses water as a direct heat source or as a heat
transfer medium to transfer heat.
3.4 One-time heating heat pump water heater
A water heater that uses side-feed water to flow through the heat pump water
heater to reach the set termination temperature at one time.
materials shall be non-toxic, non-odor and non-flammable materials, and shall
meet the requirements of GB 8624.
5.1.10 When water inlet and outlet pipes of the water heater’s pressure-
resistant water tank are directly installed in the public water supply system, the
water inlet and outlet pipes shall comply with the requirements of the relevant
national water pipe connector standards.
5.1.11 Electrical control equipment
The control equipment of water heaters shall be able to function properly.
Various protection devices shall meet the design requirements and be sensitive
and reliable.
5.1.12 The installation of each component of the water heater shall be firm
and reliable. The compressor shall have anti-vibration measures. There shall
be no abnormal sound when the water heater operates. There shall be no
friction and collision between pipelines and components. The electromagnetic
directional valve of the water heater shall be sensitive and reliable.
5.1.13 The circulating water pump provided for the water heater shall ensure
the normal operation of the water heater with its flow and head. The heat-source
heat exchanger and the hot-water heat exchanger provided for the water heater
shall meet the relevant requirements for hot water.
5.1.14 Salt spray resistance of electroplating parts
After being tested according to the method of 6.4.11, the area of rust on each
rust spot on the metal plating shall not exceed 1mm2; there shall be no more
than 2 rust spots or rust on the area of 100cm2 of the test piece coating; when
it is less than 100cm2, there shall be no rust spot and rust.
5.1.15 Coating adhesion of coating parts
The coating of the coating parts shall be firm. After being tested according to
the method of 6.4.12, the adhesion shall be up to Level 2 or above specified in
GB/T 1720.
5.2 Safety requirements
The safety requirements for water heaters shall comply with the relevant
provisions of JB 8654.
5.3 Performance requirements
5.3.1 Airtightness requirements for the heating system
Each part of the water heater’s heat pump system shall be sealed. After being
When tested in accordance with the method of 6.4.6, the heating parts of the
air-source heat pump water heater shall not be damaged. Meanwhile, the high-
pressure, anti-freeze, and overload protectors shall not be opened, and the unit
shall be able to operate normally.
5.3.6 Automatic defrosting
When performing defrosting test on the air-source heat pump water heater in
accordance with the method of 6.4.7, the following requirements shall be met.
— The safety protection elements and devices shall not operate and shall
stop operation;
— The defrosting function is normal; the defrosting is thorough; the melting
water in the defrosting shall be able to be discharged normally;
— In the continuous operation after the initial defrosting is completed, the
total time required for defrosting shall not exceed 20% of the operating
cycle time; for the unit equipped with more than two independent
refrigeration cycles, the sum of the independent cycle defrosting time
shall not exceed 20% of the total running time of each independent cycle.
5.3.7 Requirements for the minimum load condition
The water-source heat pump water heater shall adopt low-temperature
protection on the heat source side. When tested in accordance with the method
of 6.4.8, the following requirements shall be met.
— The protective device is not allowed to open; the water heater cannot be
damaged;
— The low-temperature protection function is normal; when the heat-source
water temperature is equal to or higher than the allowable cryogenic
temperature, the water heater shall be able to function normally.
5.3.8 Off-design performance
The temperature conditions for off-design performance of the water heater are
shown in Table 1 and Table 2. TEST in accordance with the method of 6.4.9.
DRAW a performance graph or chart.
5.3.9 Noise
Water heaters shall make noise measurements in accordance with the
provisions of 6.4.10. The actual measured maximum noise value shall not be
greater than the specified value in Table 5, and shall not be greater than the
unit’s indicated value. The tolerance shall be +3dB(A).
6.4.2.2 FILL the pressure-resistant water tank with clean water. ENSURE 1.25
times the design pressure. OBSERVE all parts and connectors, which shall
comply with the provisions of 5.3.2.2.
6.4.3 Electrical control equipment test
The water heater runs continuously under conditions close to the nominal
heating conditions. CHECK the electrical control equipment and protective
devices, which shall comply with the provisions of 5.1.1.1.
6.4.4 Nominal condition performance test of water heater
6.4.4.1 Heating capacity test
Under the nominal conditions specified in Table 1 and Table 2, and the power
conditions specified in 6.1.2, DETERMINE the heating capacity of the water
heater using the method of Annex B. The additional electrical heating shall not
be turned on.
6.4.4.2 Heating consumed power test
While determining the heating capacity according to the method of Annex B,
DETERMINE the total heating consumed power during the operation of the
water heater.
6.4.4.3 Electrical heating test for additional electrical heating heat pump
water heater
When the additional electrical heating heat pump water heater is conducted
with the heat pump heating capacity test according to 6.4.4.1, after the
termination temperature of water reaches the manufacturer specified
temperature, ENERGIZE the auxiliary electric heater, and DETERMINE the
consumed electric power, which shall comply with the provisions of 5.3.3.4.
6.4.4.4 Water-side pressure loss test
The water-side pressure loss shall be determined according to the method for
measuring the pressure loss on the water side of the unit specified in GB/T
18430.1. Measured pressure loss on the service side and heat source side shall
meet the requirements of 5.3.3.5.
6.4.5 Maximum load condition test
6.4.5.1 One-time heating heat pump water heater
At rated frequency, the test voltage is 90% and 110% of the rated voltage,
respectively. OPERATE according to the maximum heating load conditions
specified in Table 1 and Table 2. After reaching stability, RUN continuously for
1h. Then STOP for 3min (the voltage increases by no more than 3% during this
condition.
6.4.8 Minimum load condition test
6.4.8.1 One-time heating heat pump water heater
At rated frequency and rated voltage, the water-source heat pump water heater
is operated under the minimum operating heating conditions specified in Table
2. The water heater shall be capable of continuous operation for at least 30min.
6.4.8.2 Circulate heating heat pump water heater
At rated frequency and rated voltage, the water-source heat pump water heater
is operated under low-temperature heating conditions and test water flow
specified in Table 2. SHUT down after the temperature of the water tank on the
service side of the water heater reaches the termination temperature of water
of this condition.
6.4.9 Off-design test
When a certain condition in Table 1 and Table 2 changes, other conditions are
tested according to the flow conditions and temperature conditions under
nominal conditions. DETERMINE the heating capacity and the corresponding
heating consumed power. The test shall include the condition points of
corresponding condition temperatures in Table 1 and Table 2. The test results
are plotted as a graph or table. Each graph or table shall have the values of not
less than 4 measurement points. <...