Detail of GB 4706.32-2012

Introduction of GB 4706.32-2012

All technical contents of this part are compulsory. GB 4706 consists of several parts under the general title Household and similar electrical appliances - Safety, in which, Part 1 gives general requirements, and the rest give particular requirements. This is Part 32 of GB 4706. This part shall be used in conjunction with GB 4706.1-2005 Household and similar electrical appliances - Safety - Part 1: General requirements. This part is developed in accordance with the rules given in GB/T 1.1-2009. This part replaces GB 4706.32-2004 Safety of household and similar electrical appliances - Particular requirements for heat pumps, air-conditioner and dehumidifier. The following main changes have been made with respect to GB 4706.32-2004: ——In Clause 1, the content to which “this part is applicable” is modified into “electrical heat pumps, including sanitary hot water heat pumps, air conditioners, and dehumidifiers incorporating motor-compressors and hydronic room fan coils, their maximum rated voltages being not more than 250V for single phase appliances and 600V for all other appliances.” in the scope; ——In Clause 1, “this part also applies to electrical heat pumps, air conditioners and dehumidifiers containing flammable refrigerant. Flammable refrigerants are defined in 33.121.” is added in the scope; ——In Clause 1, the note in the scope is modified to “Note 1: A definition of 'motor-compressor' is given in GB 4706.17, which includes the statement that the term motor-compressor is be used to designate either a hermetic motor-compressor or semi-hermetic motor- compressor.”; ——In Clause 1, “this part does not take into account chemicals other than group A1, A2, or A3 as defined by 3.121.” is added in the scope; ——In Clause 1, the note in the scope is modified to “Note 3: This part specifies particular requirements for the use of flammable refrigerants. Unless specifications are covered by this part, including the annexes, requirements for refrigerating safety are covered by ISO 5149. The sections and clauses in ISO 5149:1993 of particular concern to this part are as follows: ——Section 3: Design and construction of equipment applies to all appliances and systems. ——Section 4: Requirements for utilization applies to appliances and systems which are for “similar electrical appliances”, i.e. commercial and light industrial. ——Section 5: Operating procedures applies to appliances and systems which are for “similar electrical appliances”, i.e. commercial and light industrial.”; ——In Clause 1, the content after the third dash in Note 4 in the scope is modified into “in many countries additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.”; ——Clause 2 - "Normative references" is added;; ——3.120 is modified into “fan coil/air handling unit factory-made assembly which provides one or more of the functions of forced circulation of air, heating, cooling, dehumidification and filtering of air, but which does not include the source of cooling or heating Note: The device is normally designed for free intake of air from a room and delivery of air into the same room, but may be applied with duct work. This device may be designed for furred-in application or with an enclosure for application within the conditioned space.”; ——In Clause 3, definitions 3.121, 3.122, 3.123, 3.124, 3.125 and 3.126 are added; ——In 5.2, the following content is added: “the testing of Clause 21 may be carried out on separate samples. The testing of Clauses 11, 19 and 21 shall require that pressure measurements be made at various points in the refrigerating system. At least one additional specially prepared sample is required for the tests of Annex FF (Leak simulation tests), if that test option is selected. The temperatures on the refrigerant piping shall be measured during the test of Clause 11. Note 101: Due to the potentially hazardous nature of the tests of Clause 21 and Annexes EE and FF, special precautions need to be taken when carrying out the tests.; ——In 7.1, “the maximum operating pressure for the heat exchanger” is modified into “the maximum operating pressure for the heat exchanger for hydronic fan coil/air handling units”; ——In 7.1, 7.6 and 7.12, the symbol contents that shall be provided when a flammable refrigerant is employed are added; ——In 11.2, the content after the second dash is modified into “flow rates for liquid source or sink equipment shall be the minimum specified in the manufacturer’s instructions except for fan coils where the flow rates and liquid temperatures shall be the maximum specified in the manufacturer’s instructions;”; ——In 15.4, “indoor floor or wall mounted units accessible to the general public are tested as follows:” is added; ——In 19.10.1, “the test of 19.10 is repeated on class I appliances incorporating tubular sheathed or embedded heating elements. However, controls are not short-circuited but one end of the element is connected to the sheath of the heating element. The test is repeated with the polarity of the supply to the appliance reversed and with the other end of the element connected to the sheath. The test is not carried out on appliances intended to be permanently connected to fixed wiring and on appliances where an all-pole disconnection occurs during the test of 19.10. Note 1: Appliances with a neutral are tested with the neutral connected to the sheath. Note 2: For embedded heating elements, the metal enclosure is considered to be the sheath.” is added; ——21.1 Addition: “Safety requirements specified in ISO 5149:1993 shall apply. Safety requirements specified in Annex EE shall apply. The pressure test in Annex EE applies to parts other than pressure vessels."; ——22.102 is revised as follows: “22.102.1 Appliances provided with supplementary heaters for air shall be provided with at least two thermal cut-outs. The thermal cut-out intended to operate first shall be a self-resetting thermal cut-out, the other thermal cut-out shall be a non-self-resetting thermal cut-out. Compliance is checked by visual inspection and during the tests of Clause 19. Note: If, during the tests of Clause 19, a self-resetting control operates, it would be necessary to short out this control to determine if the non-self-resetting thermal cut-out then operates. 22.102.2 Appliances provided with supplementary heaters for water shall incorporate a non-self-resetting thermal cut-out, providing all-pole disconnection that operates separately from water thermostats. However, for appliances intended to be connected to fixed wiring, the neutral conductor need not be disconnected. Compliance is checked by visual inspection and during the tests of Clause 19. Note: Anti-frost heaters are not considered to be supplementary heaters for water, if it is not possible to heat up the water to a temperature higher than 80℃ at the highest operating temperature within 6h, with the temperature switch short circuited and with water flow stopped. 22.102.3 Thermal cut-outs of the capillary type shall be so designed that the contacts open in the event of leakage from the capillary tube. Compliance is checked by visual inspection.”; ——22.112~22.118 are added, giving the requirements for the construction of appliances using flammable refrigerants; ——Annex BB (normative) “Selected information about refrigerants” is add added; ——Annex CC (informative) “Transportation, marking and storage for units that employ flammable refrigerants” is added; ——Annex DD (normative) “Service operations” is added; ——Annex EE (normative) “Pressure tests” is added; ——Annex FF (normative) “Leak simulation tests” is added; ——Annex GG (normative) “Charge limits, ventilation requirements and requirements for secondary circuits” is added; ——The “Bibliography” is added. This part, by means of translation, is identical to IEC 60335-2-40:2005 Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air conditioners and dehumidifiers, including its Supplement 1 (2005) and Supplement 2 (2005). The following editorial changes have been made in this part: ——The standard has been renamed as Household and similar electrical appliances – Safety - Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers so as to be consistent with the existing standard series. The Chinese documents identical to the normative international documents given in this part are as follows: ——GB 3836.8-2003 Electrical apparatus for explosive atmospheres - Part 8: Type of protection "n” (IEC 60079-15:2001, MOD). ——GB 3836.15-2000 Electrical apparatus for explosive gas atmospheres - Part 15: Electrical installations in hazardous areas (other than mines) (eqv IEC 60079-14:1996). ——GB 9364 (all parts) Miniature fuses [IEC 60127 (all parts)]. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This part was proposed by the China National Light Industry Council. This part is under the jurisdiction of National Technical Committee on Household Electric Appliances of Standardization Administration of China (SAC/TC 46). The previous edition of GB 4706.32-2004 is as follows: ——GB 4706.32-1996. Household and similar electrical appliances - Safety - Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers 1 Scope This clause of GB 4706.1-2005 is replaced by the following: This part of GB 4706 specifies the safety of electrical heat pumps, air conditioners and dehumidifiers for household and similar purposes. This part is applicable to electrical heat pumps, including sanitary hot water heat pumps, air conditioners, and dehumidifiers incorporating motor-compressors and hydronic room fan coils, their maximum rated voltages being not more than 250V for single phase appliances and 600V for all other appliances. Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this part. This part also applies to electrical heat pumps, air conditioners and dehumidifiers containing flammable refrigerant. Flammable refrigerants are defined in 33.121. The appliances referenced above may consist of one or more factory made assemblies. If provided in more than one assembly, the separate assemblies are to be used together, and the technical requirements of this standard are based on the use of matched assemblies. Note 1: A definition of 'motor-compressor' is given in GB 4706.17, which includes the statement that the term motor-compressor is be used to designate either a hermetic motor-compressor or semi-hermetic motor- compressor. Note 2: Requirements for refrigeration safety are covered by ISO 5149, and requirements for containers intended for storage of the heated water included in sanitary hot water heat pumps are, in addition, covered by GB 4706.12. This part does not take into account chemicals other than group A1, A2, or A3 as defined by 3.121. Note 3: This part specifies particular requirements for the use of flammable refrigerants. Unless specifications are covered by this part, including the annexes, requirements for refrigerating safety are covered by ISO 5149. The sections and clauses in ISO 5149:1993 of particular concern to this part are as follows: ——Section 3: Design and construction of equipment applies to all appliances and systems. ——Section 4: Requirements for utilization applies to appliances and systems which are for “similar electrical appliances”, i.e. commercial and light industrial. ——Section 5: Operating procedures applies to appliances and systems which are for “similar electrical appliances”, i.e. commercial and light industrial. Supplementary heaters, or a provision for their separate installation, are within the scope of this part, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance. Note 4: Attention is drawn to the fact that ——for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; ——for appliances subjected to pressure, additional requirements may be necessary; ——in many countries additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations. Note 5: This part does not apply to ——humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88); ——appliances designed exclusively for industrial processing; ——appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 2423.18-2000 Environmental testing for electric and electronic products - Part 2: Tests - Test Kb: Salt mist, cyclic (sodium chloride solution) (idt IEC 60068-2-52:1996) GB 4706.17-2010 Household and similar electrical appliances - Safety - Particular requirements for motor-compressors (IEC 60335-2-34:2009, IDT) GB 4208-2008 Degrees of protection provided by enclosure (IP code) (IEC 60529:2001, IDT) GB/T 16842-2008 Protection of persons and equipment by enclosures - Probe for verification (IEC 61032:1997, IDT) GB 19212.1-2008 Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests (IEC 61558-1:2005, IDT) IEC 60079-14:1996 Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than mines) IEC 60079-15:2001 Electrical apparatus for explosive gas atmospheres - Part 15: Type of protection “n” IEC 60127 (all parts) Miniature fuses ISO 817:1974 Organic refrigerants-number designation ISO 3864:1984 Safety colours and safety signs ISO 5149:1993 Mechanical refrigerating systems used for cooling and heating - Safety requirements ISO 7000 Graphical symbols for use on equipment - Index synopsis ANSI/ASHRAE 34:2001 Designation and safety classification of refrigerants 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. This clause of GB 4706.1-2005 is applicable except as follows: 3.1.4 Addition: Note 101: If the appliance comprises electrical accessories, including fans, the rated power input is based upon the total maximum electrical power input with all accessories energized, when operating continuously under the appropriate environmental conditions. If the heat pump can be operated in the heating or cooling mode, the rated power input is based upon the input in the heating or in the cooling mode, whichever is the greater. 3.1.9 Replacement: normal operation conditions that apply when the appliance is mounted as in normal use and is operating under the most severe operating conditions specified by the manufacturer 3.101 heat pump appliance which takes up heat at a certain temperature and releases heat at a higher temperature Note: When operated to provide heat (e.g., for space heating or water heating), the appliance is said to operate in the heating mode; when operated to remove heat (for example, for space cooling), it is said to operate in the cooling mode. 3.102 sanitary hot water heat pump heat pump intended to transfer heat to water suitable for human consumption 3.103 air conditioner encased assembly or assemblies designed as an appliance to provide delivery of conditioned air to an enclosed space, room or zone. It includes an electrically operated refrigeration system for cooling and possibly dehumidifying the air. It may have means for heating, circulating, cleaning and humidifying the air 3.104 dehumidifier encased assembly designed to remove moisture from its surrounding atmosphere. It includes an electrically operated refrigeration system and the means to circulate air. It also includes a drain arrangement for collecting and storing and/or disposing of the condensate 3.105 dehumidification-comfort dehumidification to reduce the humidity within a space to a level to satisfy the requirements of the occupants 3.106 dehumidification-process dehumidification to reduce the humidity within a space to a level necessary for the process or the storage of goods and/or materials or the drying out of the building fabric 3.107 dehumidification-heat recovery dehumidification where the latent and sensitive heat removed from the space together with the compressor heat is reused in another application rather than rejected outside to waste 3.108 wet-bulb temperature; WB temperature indicated when the temperature-sensitive element in a wetted wick has reached a state of constant temperature (evaporative equilibrium) 3.109 dry-bulb temperature; DB temperature indicated by a dry, temperature-sensitive element shielded from the effects of radiation 3.110 evaporator heat exchanger in which refrigerant liquid is vaporized by absorption of heat 3.111 heat exchanger device specifically designed to transfer heat between two physically separated fluids 3.112 indoor heat exchanger heat exchanger designed to transfer heat to the indoor parts of the building or to the indoor hot water supplies (e.g. sanitary water) or to remove heat therefrom 3.113 outdoor heat exchanger heat exchanger designed to remove or release heat from the heat source (for example, ground water, outdoor air, exhaust air, water or brine) 3.114 supplementary heater electric heater provided as part of the appliance to supplement or replace the output of the refrigerant circuit of the appliance by operation in conjunction with, or instead of, the refrigeration circuit 3.115 pressure-limiting device mechanism that automatically responds to a predetermined pressure by stopping the operation of the pressure-imposing element 3.116 pressure-relief device pressure actuated valve or rupture member which functions to relieve excessive pressure automatically 3.117 self-contained unit complete appliance, in suitable frames or enclosures, that is fabricated and shipped in one or more sections, and has no refrigerant containing parts connected in the field other than by companion or block valves Note 1: A self-contained unit in a single frame or enclosure is called a single package unit. Note 2: A self-contained unit in more than one frame or enclosure is called a split package unit. 3.118 appliances accessible to the general public appliances intended to be located in residential buildings or in commercial building 3.119 appliances not accessible to the general public appliances which are intended to be maintained by qualified service personnel and located either in machine rooms and the like or at a level not less than 2.5m or in secured rooftop areas 3.120 fan coil/air handling unit factory-made assembly which provides one or more of the functions of forced circulation of air, heating, cooling, dehumidification and filtering of air, but which does not include the source of cooling or heating Note: The device is normally designed for free intake of air from a room and delivery of air into the same room, but may be applied with duct work. This device may be designed for furred-in application or with an enclosure for application within the conditioned space. 3.121 flammable refrigerant refrigerant with a classification of class A2 or A3 in compliance with ANSI/ASHRAE 34:2001 [ISO 817] classification 3.122 refrigerating system combination of interconnected refrigerant containing parts constituting one closed refrigerant circuit in which refrigerant is circulated for the purpose of extracting heat at the low temperature side to reject heat at the high temperature side by changing the state of the refrigerant 3.123 maximum allowable pressure a limit to the refrigerating system operating pressure, generally the maximum pressure for which the equipment is designed, as specified by the manufacturer Note: Maximum allowable pressure constitutes a limit to the operating pressure whether the equipment is working or not, see Clause 21. 3.124 low-pressure side the part(s) of a refrigerating system operating at the evaporator pressure 3.125 high-pressure side the part(s) of a refrigerating system operating at the condenser pressure 3.126 service port a means to access the refrigerant in a refrigerating system for the purpose of charging or servicing the system, typically a valve, tube extension or entry location 4 General requirements This clause of GB 4706.1-2005 is applicable. 5 General conditions for the tests This clause of GB 4706.1-2005 is applicable except as follows: 5.2 Addition: The testing of Clause 21 may be carried out on separate samples. The testing of Clauses 11, 19 and 21 shall require that pressure measurements be made at various points in the refrigerating system. At least one additional specially prepared sample is required for the tests of Annex FF (Leak simulation tests), if that test option is selected. The temperatures on the refrigerant piping shall be measured during the test of Clause 11. Note 101: Due to the potentially hazardous nature of the tests of Clause 21 and Annexes EE and FF, special precautions need to be taken when carrying out the tests. 5.6 Addition: Any controls which regulate the temperature or humidity of the conditioned space are rendered inoperative during the test. 5.7 Replacement: The tests and test conditions of Clauses 10 and 11 are carried out under the most severe operating conditions within the operating temperature range specified by the manufacturer. Annex AA provides examples of such temperature conditions. 5.10 Addition: For split-package units, the refrigerant lines shall be installed in accordance with the installation instructions. The refrigerant line length shall be the maximum length stated in the installation instructions or 7.5m, whichever is the shorter. The thermal insulation of the refrigerant lines shall be applied in accordance with the installation instructions. 5.101 Motor-compressors are also subjected to the relevant test of Clause 19 of GB 4706.17-2010, unless the motor-compressor complies with that standard, in which case it is not necessary to repeat these tests. 5.102 Motor-compressors that are tested and comply with GB 4706.17 need not be additionally tested for Clause 21. 6 Classification This clause of GB 4706.1-2005 is applicable except as follows: 6.1 Modification: Appliance shall be of class I, class II or class III. 6.2 Addition: Appliances shall be classified according to degree of protection against harmful ingress of water in accordance with GB 4208-2008: ——appliances or parts of appliances intended for outdoor use shall be at least IPX4; ——appliances intended only for indoor use (excluding laundry rooms) may be IPX0; ——appliances intended to be used in laundry rooms shall be at least IPX1. 6.101 Appliances shall be classified according to the accessibility either as appliances accessible to the general public or as appliances not accessible to the general public. Compliance is checked by visual inspection and the relevant tests. 7 Marking and instructions This clause of GB 4706.1-2005 is applicable except as follows: 7.1 Modification: Replace the second dash by: ——symbol for nature of supply including number of phases, unless for single phase operation. Addition: ——rated frequency; ——the mass of the refrigerant, or of each refrigerant in a blend other than those of the azeotropic type; ——the refrigerant identification: for a single component refrigerant, one of the following:  the chemical formula;  the refrigerant number; for a blended refrigerant, one of the following:  the chemical name of each of the components;  the chemical formula for each of the components;  the refrigerant numbers of each of the components;  the refrigerant number of the refrigerant blend; ——permissible excessive operating pressure for the storage tank (for sanitary hot water heat pumps); ——the maximum operating pressure for the heat exchanger for hydronic fan coil/air handling units; ——for the refrigerant circuit; should the permissible excessive operating pressure for the suction and discharge sides differ, a separate indication is required; ——IP number according to degree of protection against ingress of water, other than IPX0. Appliances shall be marked with all of the designations and the rated inputs of the supplementary heaters for which they are intended to be used, and shall have provision for identifying the actual heater that is field installed. Unless it is evident from the design, the enclosure of the appliance shall be marked, by words or by symbols, with the direction of the fluid flow. The flame symbol and the instruction manual symbol of 7.6 shall be visible when a flammable refrigerant is employed and the following conditions exist: ——accessing parts expected to be subjected to maintenance or repair; ——observing the appliance under sale or installed conditions; ——observing the appliance packaging, if the appliance is charged with refrigerant. If a flammable refrigerant is used, the symbols for reading the user manual, the repair manual and the installation manual (symbols 3084, 3038 and 1785 of ISO 7000) shall be placed on the appliance in a location visible to the persons required to know the information. The perpendicular height shall be at least 10mm. An additional warning symbol (flame symbol: 2-2 of GB 2894-2008) shall be placed on the nameplate of the unit near the declaration of the refrigerant type and charge information. The perpendicular height shall be at least 10mm, and the symbol need not be in colour. Note 101: When installed, the marking shall be visible after removing a detachable part. The following warning shall also be applied to the appliance when a flammable refrigerant is employed.   WARNING: Appliance shall be installed, operated and stored in a room with a floor area larger than ‘X’ m2 (only applies to appliances that are not fixed appliances). For appliances, which are not fixed appliances, the minimum room size X shall be specified on the appliance. The X in the marking shall be determined in m2 by the procedure described in GG.2 of Annex GG for unventilated areas and the X in the marking shall be 4 if the refrigerant charge of the appliance is less than m1 (see Annex GG, GG.1). The maximum allowable pressure for the low-pressure side and the high-pressure side shall be marked on the product. Note 102: For the refrigerating system, if the maximum allowable pressure of the low-pressure side and the high-pressure side is the same, a single indication is permitted. If not already visible when accessing a service port and if a service port is provided, the service port shall be marked to identify the type of refrigerant. If the refrigerant is flammable, symbol B.3.2 of ISO 3864:1984, shall be included, without specifying the colour. 7.6 Addition: When a flammable refrigerant is employed, a warning symbol 2-2 of GB 2894-2008, including colour and format, shall be permanently placed on the appliance. The perpendicular height of the triangle containing the "Caution, risk of fire" symbol shall be at least 30mm. When a flammable refrigerant is employed, a symbol requiring reference to the manual [2-2 of GB 2894-2008], including colour and format, shall be permanently placed on the appliance. 7.12 Addition: For appliances not accessible to the general public, the classification according to 6.101 shall be included. For appliances using flammable refrigerants, an installation, service and operation manual, either separate or combined manuals, shall be provided and include the information given in Annex DD. 7.12.1 Addition: In particular, the following information shall be supplied: ——that the appliance shall be installed in accordance with national wiring regulations; ——the dimensions of the space necessary for correct installation of the appliance including the minimum permissible distances to adjacent structures; ——for appliances with supplementary heaters, the minimum clearance from the appliance to combustible surfaces; ——a wiring diagram with a clear indication of the connections and wiring to external control devices and supply cord; ——the range of external static pressures at which the appliance was tested (add-on heat pumps, and appliances with supplementary heaters, only); ——the method of connection of the appliance to the electrical supply and interconnection of separate components; ——indication of which parts of the appliance are suitable for outdoor use, if applicable; ——details of type and rating of fuses; ——details of supplementary heating elements that may be used in conjunction with the appliance, including fitting instructions either with the appliance or with the supplementary heater; ——maximum and minimum water or brine operating temperatures; ——maximum and minimum water or brine operating pressures. Open storage tanks of heat pumps for water heating shall be accompanied by an instruction sheet which shall state that the vent shall not be obstructed. 7.15 Addition: A marking may be located on a panel that can be removed for installation or service, providing that the panel shall be in place for the intended operation of the appliance. 7.101 A marking shall be provided for a replaceable fuse or a replaceable overload protective device provided as a part of a product or remote control assembly. It shall be visible when the cover or door of the compartment is open. This marking shall specify ——the rating of the fuse in amperes (A), the type and voltage rating, or ——the manufacturer and model designation of the replaceable overload protective device. 7.102 If the product is intended for permanent connection to fixed wiring with aluminium wires, the marking shall so state. Compliance is checked by visual inspection.

Contents of GB 4706.32-2012

Foreword III 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 5 General conditions for the tests 6 Classification 7 Marking and instructions 8 Protection against access to live parts 9 Starting of motor-operated appliances 10 Power input and current 11 Heating 12 Void 13 Leakage current and electric strength at operating temperature 14 Transient overvoltages 15 Moisture resistance 16 Leakage current and electric strength 17 Overload protection of transformers and associated circuits 18 Endurance 19 Abnormal operation 20 Stability and mechanical hazards 21 Mechanical strength 22 Construction 23 Internal wiring 24 Components 25 Supply connection and external flexible cords 26 Terminals for external conductors 27 Provision for earthing 28 Screws and connections 29 Clearances, creepage distances and solid insulation 30 Resistance to heat and fire 31 Resistance to rusting 32 Radiation, toxicity and similar hazards Annex D (Normative) Alternative requirements for protected motors Annex I (Normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance Annex AA (Informative) Examples for operating temperatures of the appliance Annex BB (Normative) Selected information about refrigerants Annex CC (Informative) Transportation, marking and storage for units that employ flammable refrigerants Annex DD (Normative) Service operations Annex EE (Normative) Pressure tests Annex FF (Normative) Leak simulation tests Annex GG (Normative) Charge limits, ventilation requirements and requirements for secondary circuits Bibliography