Standard No.:	GB/T 18837-2002
English Name:	Multi-connected air-condition (heat pump) unit
Chinese Name:	多联式空调（热泵）机组
Chinese Classification:	J73    Refrigeration equipment
Professional Classification:	GB    National Standard
Issued by:	AQSIQ
Issued on:	2002-09-11
Implemented on:	2003-4-1
Status:	superseded
Superseded by:	GB/T 18837-2015 Multi-connected air-condition(heat-pump)unit
Superseded on:	2016-7-1
Language:	English
File Format:	PDF
Word Count:	11000 words
Price(USD):	400.0
Delivery:	via email in 1 business day

1 Scope This standard specifies definitions, types and basic parameters, technical requirements, test, inspection rules, marking, packaging, transportation and storage of multi-connected air-condition (heat pump) unit (hereinafter referred to as “ the unit”). This standard is applicable to the multi-connected air-condition (heat pump) unit. Dual refrigerating cycle system and multiple refrigerating cycle system may refer to this standard. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies. GB/T 191 Packaging - Pictorial marking for handling of goods GB 8624-1997 Classification on burning behavior for building materials GB/T 2423.17 Basic environmental testing procedures for electric and electronic products Test Ka: Salt mist (eqv IEC 68-2-11: 1981) GB 2828-1987 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches) GB/T 6388 Transport package shipping mark GB/T 13306 Plates GB/T 17758-1999 Unitary air conditioners JB 8655-1997 Safety requirements of unitary air conditioners JB/T 7249-1994 Terminology of refrigeration equipment 3 Definitions For the purposes of this document, the terms and definitions given in JB/T 7249 as well as the followings apply. 3.1 multi-connected air-condition (heat pump) unit one or several air-cooled outdoor machines may connect several direct evaporative indoor machines with different or the same type and capacity to form a single refrigeration cycle system, which can directly provide treated air to one or several areas 3.2 heat pump refrigerating system that absorbs heat from outdoor environmental medium and releases heat indoors by changing the refrigerant current direction of the refrigerating system, thus heating up the indoor air 3.3 refrigerating (heating) capacity of indoor machine quantity of heat that the indoor machine (single unit) removes from the enclosed space, room or area under the specified refrigerating (heating) capacity test conditions, in W 3.4 refrigerating (heating) capacity quantity of heat that the unit removes from the enclosed space, room or area under the specified refrigerating (heating) capacity test conditions, in W 3.5 maximum ordonnance rate maximum value of the ratio between the sum of the nominal refrigerating capacity of each indoor machine and the nominal refrigerating capacity of the unit, in % 3.6 minimum ordonnance rate minimum value of the ratio between the sum of nominal refrigerating capacity of each indoor machine and the nominal refrigerating capacity of the unit, in % 3.7 distributary disequilibrium rate of multi-connected air-condition (heat pump) unit under the specified refrigerating (heating) capacity test conditions, the ratio between the absolute value of the difference between the measured refrigerating (heating) capacity and its nominal refrigerating (heating) capacity of each indoor machine of the unit, in % 3.8 consumed power of indoor machine power consumed by a single indoor machine in air supply operation, in W 3.9 refrigerating consumed power total power consumed by the unit for operating under the specified refrigerating capacity test conditions, in W 3.10 heating consumed power total power consumed by the unit for operating under the specified heating capacity test conditions, in W 3.11 energy efficiency ratio (EER) ratio of the refrigerating capacity of the unit to the consumed power of refrigerating under the specified refrigerating capacity test conditions, with its value expressed in W/W 3.12 coefficient of performance (COP) ratio of the heating capacity of the unit to the consumed power of heating under the specified heating capacity test conditions, with its value expressed in W/W 3.13 refrigerating integrated part load value (IPLV(C)) value which is tested and calculated according to the method described in Annex A and describes the refrigerating efficiency of part load, with its value expressed as W/W 3.14 heating integrated part load value (IPLV(H)) value which is tested and calculated according to the method described in Annex A and describes the heating efficiency of part load, with its value expressed as W/W 3.15 air enthalpy difference method method for determining the capacity of unit, which measures the air intake parameters, the air output parameters and the circulating air volume of the unit, with the refrigerating (heating) capacity determined based on the product of the measured air volume and the difference between the enthalpy of air intake and that of air output

Foreword i 1 Scope 2 Normative references 3 Definitions 4 Type, model and basic parameters 5 Technical requirements 6 Test 7 Inspection rules 8 Marking, packaging, transportation and storage Annex A (Normative) Test and calculation of integrated part load value of multi-connected air-condition (heat pump) unit Annex B (informative) Model compiling for multi-connected air-condition (heat pump) unit Annex C (Informative) Disequilibrium rate test for multi-connected air-condition (heat pump) unit