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GB/T 20738-2018 English PDF

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Q: Should I purchase the latest version GB/T 20738-2018?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20738-2018 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$499.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20738-2018: Rooftop air conditioning unit
Status: Valid

GB/T 20738: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20738-2018	499	Add to Cart	5 days	Rooftop air conditioning unit	Valid
GB/T 20738-2006	RFQ	ASK	5 days	Rooftop air conditioning unit	Obsolete

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Basic data

Standard ID: GB/T 20738-2018 (GB/T20738-2018)
Description (Translated English): Rooftop air conditioning unit
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J73
Classification of International Standard: 27.200
Word Count Estimation: 25,263
Date of Issue: 2018-05-14
Date of Implementation: 2018-12-01
Older Standard (superseded by this standard): GB/T 20738-2006
Quoted Standard: GB/T 191; GB 2894-2008; GB 4706.32-2012; GB/T 6388; GB/T 9237; GB/T 10870-2014; GB/T 13306; GB/T 14294-2008; GB/T 17758-2010; GB/T 18430.1-2007; GB/T 18836-2017; GB 19576; GB 25130; JB/T 4330-1999; JB/T 7249
Regulation (derived from): National Standards Announcement No. 6 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the terms and definitions, types and basic parameters, technical requirements, test methods, inspection rules, markings, packaging, transportation and storage of roof-mounted air-conditioning units (hereinafter referred to as ��air conditioners��) driven by motors. This standard applies to roof air-conditioning units with concentrated air supply.

GB/T 20738-2018: Rooftop 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.
Rooftop air conditioning unit ICS 27.200 J73 National Standards of People's Republic of China Replace GB/T 20738-2006 Roof air conditioning unit Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 type and basic parameters 2 5 Technical requirements 5 6 Test method 8 7 Inspection rules 10 8 Marking, packaging, transportation and storage 12 Appendix A (informative) Installation of roof air conditioning units 14

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 20738-2006 "Roof-type air conditioning unit". Compared with GB/T 20738-2006, except for editorial repair The main technical changes changed are as follows. --- Increased the "cooling integrated partial load performance coefficient", "cooling season energy efficiency ratio", "year-round performance coefficient" and "cooling energy efficiency ratio" Religious requirements (see Chapter 3 and 5.3.17); --- Added the classification of "air conditioning capacity adjustment characteristics (constant volume, non-constant type)" (see 4.1.3); --- Revised the model preparation requirements, canceled Appendix A "Modeling method for roof type air conditioning unit" (see 4.2,.2006 version 4.2); ---Modified the normal working conditions and working parameters of the air conditioner (see 4.3, 4.3 of the.2006 edition); --- Removed the salt spray resistance of the plated parts and the adhesion requirements and test of the paint layer (see 5.1.13, 5.1.14, 6.3 of the.2006 edition). 21.6.3.22); ---Modified the safety requirements of air conditioners and adjusted the normative references (see 5.2, 5.3 of.2006 edition); --- Increased the noise requirement "the measured value should not be greater than the explicit value of 3dB (A)" (see 5.3.19); --- Increased the "water side pressure loss" requirements of air conditioners (see 5.3.20); --- Increased the air conditioning machine performance test power consumption correction requirements, the correction method is quoted from GB/T 18836-2017 (see Table 6); --- Increased requirements for the use of flammable refrigerants (see Chapter 8). This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Refrigeration and Air Conditioning Equipment Standardization Technical Committee (SAC/TC238). This standard is drafted by. Changzhou Aster Air Conditioning Equipment Co., Ltd., Hefei General Machinery Research Institute, Daikin (China) Investment Limited Company, Guangdong Jirong Air Conditioning Co., Ltd., Kunshan Taijia Electromechanical Co., Ltd., Shenzhen McQuay Air Conditioning Co., Ltd., Hefei General Environmental Control Technology limited liability company. Participated in the drafting of this standard. Guangzhou East and West Kangda Air Conditioning Co., Ltd., Zhejiang Dunan Artificial Environment Co., Ltd., Zhejiang Jiangyu Electric Machine Co., Ltd., Guangdong Shenling Environmental System Co., Ltd., Zhejiang Guoxiang Co., Ltd. The main drafters of this standard. Zhong Yu, Chao Longzhao, Zhang Xiuping, Zhang Jianqiang, Wu Jiesheng, Gao Jianting, Zhou Wei, Peng Jinghua, Cheng Bin, Li Xiaoyu, Pan Zhanhua, Ma Jizhen. The previous versions of the standards replaced by this standard are. ---GB/T 20738-2006. Roof air conditioning unit

1 Scope

This standard specifies the terms and definitions, types and bases of roof-mounted air conditioning units (hereinafter referred to as "air conditioners") driven by electric motors. This parameter, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to roof-mounted air conditioning units with centralized air supply.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 191 packaging storage and transportation icon GB 2894-2008 Safety signs and guidelines for their use GB 4706.32-2012 Safety requirements for heat pumps, air conditioners and dehumidifiers for household and similar electrical appliances GB/T 6388 transport packaging receipt and delivery mark GB/T 9237 refrigeration system and heat pump safety and environmental requirements GB/T 10870-2014 Vapor compression cycle cold water (heat pump) unit performance test method GB/T 13306 signage GB/T 14294-2008 modular air conditioning unit GB/T 17758-2010 unit air conditioner GB/T 18430.1-2007 Vapor compression cycle cold water (heat pump) units - Part 1. Cold, industrial or commercial Water (heat pump) unit GB/T 18836-2017 air duct air supply (heat pump) unit GB 19576 unit air conditioner energy efficiency limit value and energy efficiency grade GB 25130 unit air conditioner safety requirements JB/T 4330-1999 Determination of noise in refrigeration and air conditioning equipment JB/T 7249 refrigeration equipment terminology

3 Terms and definitions

The following terms and definitions defined by JB/T 7249 and GB/T 17758-2010 apply to this document. 3.1 A device that is mounted on a roof and provides concentrated processing air directly to a confined space, room, or area through a duct. Note. Roof-mounted air conditioning units mainly include refrigeration systems as well as air circulation and purification devices, as well as heating, humidification and ventilation. 3.2 Refrigeration integrated partial load performance coefficient refrigeratingintegratedpartloadvalue;IPLV(C) A test and calculation according to the method described in Appendix B of GB/T 17758-2010, comprehensively describing the partial load cooling efficiency of the air conditioner Performance indicators. Note. The value is expressed in W/W. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 20738-2018_English be delivered?

Answer: Upon your order, we will start to translate GB/T 20738-2018_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 20738-2018_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 20738-2018_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 20738-2018?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20738-2018 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.