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GB/T 25857-2022 English PDF

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Q: Should I purchase the latest version GB/T 25857-2022?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25857-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$509.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 25857-2022: Low ambient temperature air source multi-connected heat pump(air-conditioning) unit
Status: Valid

GB/T 25857: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25857-2022	509	Add to Cart	5 days	Low ambient temperature air source multi-connected heat pump(air-conditioning) unit	Valid
GB/T 25857-2010	959	Add to Cart	5 days	Low ambient temperature air source multi-connected heat pump (air conditioning) unit	Obsolete

Similar standards

GB/T 25861 GB/T 25127.2 GB/T 25127.1 GB/T 25858

Basic data

Standard ID: GB/T 25857-2022 (GB/T25857-2022)
Description (Translated English): Low ambient temperature air source multi-connected heat pump(air-conditioning) unit
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J73
Classification of International Standard: 27.200
Word Count Estimation: 26,282
Date of Issue: 2022-12-30
Date of Implementation: 2023-07-01
Older Standard (superseded by this standard): GB/T 25857-2010
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25857-2022: Low ambient temperature air source multi-connected heat pump(air-conditioning) unit

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27.200 CCSJ73 National Standards of People's Republic of China Replacing GB/T 25857-2010 Low ambient temperature air source multi-connected heat pump (air conditioner) unit heat pump (air-conditioning) unit 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Types and basic parameters 2 5 Technical requirements 3 6 Test method 7 7 Inspection rules 12 8 Labeling, packaging, transportation and storage 14 Appendix A (Normative) Test and Calculation Method of Heating Seasonal Performance Coefficient 16 Appendix B (Normative) Test method for standby power 21

foreword

This document follows the rules of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 25857-2010 "Low ambient temperature air source multi-connected heat pump (air conditioner) unit", and GB/T 25857- Compared with.2010, except for structural adjustment and editorial changes, the main technical changes are as follows. a) Changed the scope of application of the standard (see Chapter 1, Chapter 1 of the.2010 edition); b) The definition of "low ambient temperature air source multi-connected heat pump (air conditioning) unit" has been changed, and "nominal heating capacity" and "nominal heating performance" have been added. The definitions of "energy coefficient", "low temperature heating coefficient of performance" and "configuration ratio" were deleted, and the definition of "heating comprehensive coefficient of performance" was deleted (see 3.1~ 3.5, 3.1, 3.2 of the.2010 edition); c) Added "according to the structural form of the indoor unit", "according to the air supply type of the indoor unit", "according to the nominal heating capacity of the unit" and "according to the product function" Classification, delete the classification of "climate and environment by unit use" (see 4.1, 4.1 of the.2010 edition); d) Changed the compilation requirements of the model (see 4.2, 4.2 of the.2010 edition); e) The environmental conditions for the normal operation of the unit have been changed, and some test conditions have been adjusted (see 4.3.2, 4.3.3, 4.3.2 and 4.3.2 of the.2010 edition). 4.3.3, 4.3.4); f) Changed the "General Requirements" of the unit, deleted some appearance requirements, coating requirements and material requirements, and deleted the uneven distribution of the unit In addition to the balance rate requirements, the heat preservation requirements, defrosting water requirements and test requirements of the unit are added, and the electromagnetic compatibility requirements are moved to the safety requirements (see 5.1, 5.3, 5.1 of the.2010 edition); g) The tolerance requirements for the nominal heating (cooling) capacity have been changed, and the "heating power consumption", "low temperature heating power consumption" and "low temperature heating power consumption" have been changed. The performance requirements of "nominal cooling power consumption" (see 5.2, 5.2 of the.2010 edition); h) Changed "Refrigeration System Sealing Performance", "Maximum Operating Heating", "Heating Defrost", "Minimum Operating Cooling", "Condensation" and "Condensation Drainage" The performance requirements of "removal capacity"; the performance requirements of "refrigeration for low-temperature operation" were added (see 5.2, 5.2 of the.2010 edition); i) The requirements for "heating power consumption of auxiliary electric heating devices" have been changed, and the relevant requirements for heating operating temperature of auxiliary electric heating devices have been added (see 5.2.7, 5.2.7 of the.2010 edition); j) Deleted the performance requirements of "Comprehensive Cooling Coefficient of Performance" and "Comprehensive Heating Coefficient of Performance", and added "Nominal Heating Coefficient of Performance" The performance requirements of "low temperature heating coefficient of performance", "heating seasonal performance coefficient" and "nominal cooling energy efficiency ratio" (see 5.2.10,.2010 version 5.2.20); k) Changed the performance requirements for "noise" (see 5.2.19, 5.2.19 of the.2010 edition); l) Added the performance requirements of "standby power" (see 5.2.20); m) The requirements for "type and accuracy of instruments and meters" used for testing have been changed (see 6.1.6, 6.1.2 of the.2010 edition); n) The requirements for the unit connection mode during the test have been changed (see Figure 1 to Figure 4, Figure 1 and Figure 2 of the.2010 edition); o) Deleted the test requirements for "auxiliary components" of the unit (see 6.2.6 of the.2010 edition); p) Changed the requirements for unit rated voltage and rated frequency deviation during the test (see 6.2.1, 6.2.2 of the.2010 edition); q) The test requirements for the connection between the indoor unit and the outdoor unit during the test have been changed (see 6.2.2, 6.2.3 of the.2010 edition); r) The test requirements for the fan speed of the indoor unit when the unit is heating are added (see 6.2.4); s) The test requirements for the "connecting pipe length" of the unit have been changed, and the test requirements for the "configuration ratio" and "number of internal units" of the unit have been added (see 6.2.5, 6.2.5 of the.2010 edition); t) The test requirements for "static pressure outside the machine" and "installation height" of the indoor unit of the unit are added (see 6.2.6); u) Added the test requirements for the "nominal heating capacity" of the unit's indoor unit (see 6.2.7); v) The test requirements for "actually measured air volume per heating capacity" of unit indoor units are added (see 6.2.8); w) Deleted "indoor unit cooling capacity test", "indoor unit power consumption test", "indoor mechanism heat test" and "refrigeration comprehensive performance coefficient Test", "heating comprehensive performance coefficient test", "unit flow unbalance rate test", "salt spray test of electroplated parts" and "painting of painted parts "Film Adhesion Test" test method (see 6.3 of the.2010 edition); x) Changed the "running test", "nominal cooling capacity test", "nominal heating capacity test", "minimum operating refrigeration test" and "minimum operating heating test", "low temperature operation refrigeration test", "heating and defrosting test" and "noise test" test requirements (see 6.3,.2010 edition 6.3); y) The tests of "standby power test", "low temperature heating capacity test", "low temperature heating power consumption test" and "coefficient of performance test" have been added method (see 6.3); z) Changed the heating test method of the auxiliary electric heating device (see 6.3.7, 6.3.7 of the.2010 edition); aa) Added the method of unit standby power test (see 6.3.20); bb) Changed the inspection rules of "type inspection" (see 7.3, 7.3 of the.2010 edition); cc) The requirements for "marking" and "packaging" have been changed (see 8.1.1, 8.2.3, 8.1.1, 8.2.3 of the.2010 edition); dd) Deleted the "test and calculation of the heating comprehensive coefficient of performance of low ambient temperature air source multi-connected heat pump (air conditioner) units" (see Appendix A of the.2010 edition); ee) Deleted the "model compilation of low ambient temperature air source multi-connected heat pump (air conditioning) units" (see Appendix B of the.2010 edition); ff) Added "test and calculation method of heating seasonal performance coefficient" (see Appendix A); gg) Added "Test method for standby power" (see Appendix B). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Refrigeration and Air Conditioning Equipment Standardization Technical Committee (SAC/T 238). This document is drafted by. Zhuhai Gree Electric Co., Ltd., Hefei General Mechanical and Electrical Products Testing Institute Co., Ltd., Qingdao Hisense Hitachi Air Conditioning System Co., Ltd., Tsinghua University, Guangdong Midea HVAC Equipment Co., Ltd., Qingdao Haier Air Conditioning Electronics Co., Ltd., Daikin (China) Investment Capital Co., Ltd., Guangdong Midea Refrigeration Equipment Co., Ltd., Guangdong Haiwu Technology Co., Ltd., Ningbo Oaks Electric Co., Ltd., Mitsubishi Heavy Industry Air Conditioning System (Shanghai) Co., Ltd., International Copper Professional Association (USA) Beijing Representative Office, Guangdong Ooke Air Conditioning and Refrigeration Co., Ltd., South China University of Science and Technology, Huazhong University of Science and Technology, Hefei General Environmental Control Technology Co., Ltd., Hefei General Machinery Research Institute Co., Ltd. The main drafters of this document. Chen Jin, Yu Kai, Wang Bo, Zhang Wenqiang, Shi Wenxing, Wang Mingren, Mao Shoubo, Yao Dan, Li Shunquan, Ni Sailong, Zhang Ting, Dai Mei, Gao Yifeng, Li Shigang, Liu Jinping, Chen Huanxin, Zhang Xiuping, Ma Jinping, Wang Luping, Yang Zixu, Li Fang, Chai Zenghui, Bao Jihu, Chen Xin, Ding Hui. This document was first published in.2010, and this is the first revision. Low ambient temperature air source multi-connected heat pump (air conditioner) unit

1 Scope

This document specifies the terms and definitions, types and Basic parameters, technical requirements, test methods, inspection rules and signs, packaging, transportation and storage. This document is applicable to multi-connected heat pump (air conditioner) units that can still operate as heat pump heating when the outdoor ambient temperature is as low as -25°C. Units designed with the outdoor ambient temperature lower than -25°C can be implemented as a reference.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 191 Packaging, storage and transportation icon marks GB/T 2828.1 Counting sampling inspection procedure Part 1.Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL) GB 2894-2008 Safety Signs and Guidelines for Their Use GB 4343.1 Electromagnetic Compatibility Requirements for Household Appliances, Electric Tools and Similar Appliances Part 1.Emission GB/T 6388 Transport packaging receipt and delivery marks GB/T 7778 Refrigerant numbering method and safety classification GB/T 9237 Refrigeration system and heat pump safety and environmental requirements GB/T 13306 Signage GB/T 17758-2010 Unitary air conditioner GB/T 18837-2015 Multi-connected air conditioner (heat pump) unit GB 25130 Safety Requirements for Unitary Air Conditioners GB/T 35758-2017 Measurement method of standby power of household appliances JB/T 4330-1999 Determination of Noise of Refrigeration and Air Conditioning Equipment

3 Terms and Definitions

The following terms and definitions defined in GB/T 18837-2015 apply to this document. 3.1 heat pump (air-conditioning) unit A multi-connected heat pump (air conditioner) that uses a vapor compression refrigeration cycle driven by an electric motor and uses air not lower than -25°C as a cold (heat) source unit. 3.2 Under the specified nominal heating conditions, the sum of the heat sent by the unit to the enclosed space, room or area per unit time. Note. The unit is watt (W). ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 25857-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25857-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 25857-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25857-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 25857-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25857-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.