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GB/T 25127.2-2020 PDF English


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GB/T 25127.2-2020English275 Add to Cart 0-9 seconds. Auto-delivery. Low ambient temperature air source heat pump(water chilling) packages -- Part 2: Heat pump(water chilling) packages for household and similar application Valid
GB/T 25127.2-2010English85 Add to Cart 0-9 seconds. Auto-delivery. Low ambient temperature air source heat pump (water chilling) packages -- Part 2: Heat pump (water chilling) packages for household and similar application Obsolete
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GB/T 25127.2-2020: PDF in English (GBT 25127.2-2020)

GB/T 25127.2-2020 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.200 J 73 Replacing GB/T 25127.2-2010 Low ambient temperature air source heat pump (water chilling) packages - Part 2.Heat pump (water chilling) packages for household and similar application ISSUED ON. JUNE 02, 2020 IMPLEMENTED ON. APRIL 01, 2021 Issued by. State Administration for Market Regulation; National Standardization Administration. Table of Contents Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 6 4 Type and basic parameters... 8 5 Technical requirements... 10 6 Test methods... 16 7 Inspection rules... 23 8 Marking, packaging, transportation, storage... 25 Appendix A (Normative) Requirements for heating performance test of low ambient temperature air source heat pump (chilling water) package... 28 Appendix B (Normative) Test and calculation method for seasonal energy consumption of low ambient temperature air source heat pump (chilling water) package... 36 Appendix C (Normative) Noise test method for low ambient temperature air source heat pump (chilling water) package... 51 Low ambient temperature air source heat pump (water chilling) packages - Part 2.Heat pump (water chilling) packages for household and similar application 1 Scope This Part of GB/T 25127 specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage of low ambient temperature air source heat pump (chilling water) packages (hereinafter referred to as "packages"), which are driven by motors for household and similar applications. This Part is applicable to packages with a nominal heating capacity greater than 35 kW, using air as the heating (chilling) source, capable of producing hot (cold) water at an ambient temperature not lower than -25 °C. Other similar packages may refer to this for implementation. 2 Normative references The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 2423.17 Environmental testing for electric and electronic products - Part 2. Test method - Test Ka. Salt mist GB 2894-2008 Safety signs and guideline for the use GB/T 3785 (all parts) Electroacoustics - Sound level meters GB/T 4208-2017 Degrees of protection provided by enclosure (IP code) GB 4706.1-2005 Safety of household and similar electrical appliances - Part 1. General requirements GB 4706.32-2012 Safety of household and similar electrical appliances - Part 32. Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers 5 Technical requirements 5.1 General requirements 5.1.1 The package shall comply with the provisions of this Part and be manufactured according to the drawings and technical conditions approved by the prescribed procedures (or according to the agreement between the user and the manufacturer). 5.1.2 In addition to all cooling (heating) system components, the package may generally include cold (hot) water circulation pumps, pipes, accessories. 5.1.3 The surface of the ferrous metal parts of the package shall be treated with anti- corrosion. 5.1.4 The surface of the electroplated parts of the package shall be smooth and uniform in color. There shall be no defects such as peeling, bottom exposure, pinholes, obvious spots, scratches. 5.1.5 The surface of the painted parts of the package shall be flat, with uniform coating and color. There shall be no obvious defects or damage such as bubbles, flow marks, wrinkles, etc.; there shall be no holiday, primer exposure, etc. 5.1.6 The surface of the decorative plastic parts of the package shall be flat, smooth, uniform in color. There shall be no defects such as cracks, bubbles, obvious shrinkage holes. Plastic parts shall be resistant to aging. 5.1.7 The electroplated parts of the package shall be corrosion-resistant. After the salt spray test in 6.3.6, the area of each rust spot or rust mark on the metal coating shall not exceed 1 mm2.There shall be no more than 2 rust spots or rust marks on the coating of each 100 cm2 test piece. There shall be no rust spots or rust spots when the area is less than 100 cm2. 5.1.8 The coating of the painted parts of the package shall have good adhesion. After the coating adhesion test in 6.3.7, the result shall not be greater than 0.30. 5.1.9 The components and materials of the package shall meet the requirements of the package's performance. 5.1.10 Before charging the refrigerant, the surfaces in contact with the refrigerant and lubricating oil in the package shall be kept clean and dry; the outer surface of the package shall be clean. 5.1.11 The installation of the components of the package shall be firm and reliable; the refrigeration compressor shall have anti-vibration measures. 5.1.12 The insulation layer of the package shall be well insulated; there shall be no condensation on the insulation layer when the package is operating normally. The insulation layer shall be non-toxic, odorless, self-extinguishing. 5.1.13 The electrical control of the package shall include the control of the compressor, circulating water pump and fan, etc.; it generally shall also have functions or devices such as motor overload protection, phase loss protection (three-phase power supply), water system interruption protection, anti-freeze protection, system high and low voltage protection. 5.1.14 The package can be equipped with a cold (hot) water circulation pump according to user requirements or actual use; its flow rate and head shall ensure the normal operation of the package. 5.1.15 The content of harmful substances in the control system hardware of the package shall comply with the provisions of GB/T 26572. 5.1.16 The safety and environmental requirements of the package shall comply with the provisions of GB/T 9237. 5.2 Sealing performance and strength requirements 5.2.1 Sealing performance The refrigeration system pipeline of the package shall have good sealing performance. when the air tightness test is carried out according to 6.3.1.1, there shall be no leakage in all parts of the system. 5.2.2 Strength requirements The water system pipeline of the package shall have sufficient strength. When the pressure test is carried out according to 6.3.1.2, there shall be no abnormal deformation and water leakage in all parts and joints of the system. 5.3 Operation test The package shall be able to start normally during the operation test; there shall be no abnormality during the operation. 5.4 Performance requirements 5.4.1 Nominal cooling capacity When tested according to the method of 6.3.2.1, the measured cooling capacity of the package shall not be less than 95% of the nominal cooling capacity. 5.4.2 Nominal cooling power consumption When tested according to the method of 6.3.2.1, the measured power consumption of - The total time required for defrosting shall not exceed 20% of the total test time. 5.4.10 -25 °C Heating When tested according to the method in 6.3.2.7, the safety device shall not be activated during the 1 h test operation of the package. 5.4.11 Performance coefficient 5.4.11.1 Nominal cooling performance coefficient When tested according to the method in 6.3.2.1, the package's nominal cooling performance coefficient shall not be less than the provisions of Table 2, and not less than 95% of the stated value; its value shall be rounded to two decimal places. 5.4.11.2 Nominal heating performance coefficient When tested according to the method of 6.3.2.2 and Appendix A, the package's nominal heating performance coefficient shall not be lower than the provisions of Table 2; meanwhile it shall not be lower than 95% of the stated value; its value shall be retained to two decimal places. 5.4.11.3 Low temperature heating performance coefficient When tested according to the method of 6.3.2.3 and Appendix A, the package's low temperature heating performance coefficient shall not be lower than the provisions of Table 2, meanwhile it shall not be lower than 95% of the stated value; its value shall be retained to two decimal places. 5.4.11.4 Heating seasonal performance factor When tested according to the method of Appendix B, the package's heating seasonal performance factor shall not be lower than the provisions of Table 2; meanwhile it shall not be lower than 95% of the stated value; its value shall be retained to two decimal places. 5.4.11.5 Annual performance factor When tested according to the method of Appendix B, the package’s annual performance factor shall not be lower than the provisions of Table 2; meanwhile it shall not be lower than 95% of the stated value; its value shall be retained to two decimal places. 5.4.12 Water side pressure loss When the package is tested according to the method of 6.3.2.9, the water side pressure loss shall not be greater than 115% of the package’s stated value. 5.4.13 Auxiliary electric heating power consumption 6.2.2 The package shall operate at the rated voltage and rated frequency specified on its nameplate. The voltage deviation shall not exceed ±2%; the frequency deviation shall not exceed ±0.5 Hz. 6.2.3 The package under test shall be installed in accordance with the method specified by the manufacturer; no structural modifications that affect the cooling capacity and heating capacity shall be made. 6.2.4 During the test, the length of the connecting pipe between the indoor and outdoor units of the package shall be the total length provided by the manufacturer, OR the length of the connecting pipe for packages with a heating capacity of not more than 9000 W shall be 5 m; the length of the connecting pipe for packages with a heating capacity of more than 9000 W shall be 7.5 m (whichever is longer). The length of the outdoor part of the connecting pipe shall not be less than 3 m; the insulation and installation of the indoor part shall be carried out in accordance with the requirements of the product manual. 6.2.5 The water quality used by the package shall comply with the provisions of Appendix D in GB/T 18430.1-2007. 6.2.6 Other requirements for package testing shall comply with the provisions of GB/T 10870-2014. 6.3 Test items 6.3.1 Air tightness and pressure test 6.3.1.1 Air tightness test The refrigerant side of the package is placed in a room with an ambient temperature of 16 °C ~ 35 °C under the design pressure without power; then tested using a leak detector with a sensitivity of not less than 5 × 10-2 Pa·m3/s or using a helium leak detector. The test results shall comply with the provisions of 5.2.1. The requirements for gas used for air tightness test shall comply with the provisions of NB/T 47012. 6.3.1.2 Vacuum test When the water side of the package is under 1.25 times the design pressure (hydraulic pressure) or 1.15 times the design pressure (air pressure), observe all parts and joints, which shall comply with the provisions of 5.2.2. 6.3.2 Nominal working condition performance 6.3.2.1 Nominal cooling capacity and nominal cooling power consumption The operating frequency or capacity of the package compressor is adjusted to the nominal cooling capacity design rating (the package of the fixed speed or fixed capacity compressor shall set the energy regulating device such as the unloading mechanism at the nominal cooling capacity design rating position). Under the nominal cooling conditions specified in Table 1, the nominal cooling capacity is measured and calculated according to the provisions of GB/T 10870-2014.The main test adopts the liquid refrigerant method for test measurement and calculation. The nominal cooling power consumption includes the total input power of the compressor motor, oil pump motor, operation control circuit, heat release side cooling fan motor (excluding the input power of the circulating water pump motor). The nominal cooling capacity and nominal cooling power consumption shall comply with the provisions of 5.4.1 and 5.4.2; the operating current and power factor shall be measured at the same time. 6.3.2.2 Nominal heating capacity and nominal heating power consumption The operating frequency or capacity of the package compressor is adjusted to the nominal heating design rating (the package of the fixed speed or fixed capacity compressor shall set the energy adjustment such as the unloading mechanism at the nominal heating design rating position). Under the nominal heating conditions specified in Table 1, the heating capacity shall be measured and calculated in accordance with the provisions of GB/T 10870-2014.The main test adopts the liquid refrigerant method for test determination and calculation. The nominal heating power consumption test and calculation are the same as 6.3.2.1.However, the nominal heating capacity and nominal heating power consumption do not include the heating capacity and power consumption of auxiliary electric heating. The nominal heating capacity and nominal heating power consumption shall comply with the provisions of 5.4.3 and 5.4.4.Measure the operating current and power factor at the same time. 6.3.2.3 Low-temperature heating capacity and low-temperature heating power consumption Adjust the operating frequency or capacity of the package compressor to an appropriate value (for packages with fixed speed or fixed capacity compressors, set the unloading mechanism and other energy adjustments to the maximum heating capacity position). Under the low-temperature heating conditions specified in Table 1, the heating capacity shall be determined and calculated in accordance with the provisions of GB/T 10870- 2014.The main test adopts the liquid refrigerant method for test determination and calculation. The test and calculation of low-temperature heating power consumption are the same as 6.3.2.1.However, the low-temperature heating capacity and low- temperature heating power consumption do not include the heating capacity and power consumption of auxiliary electric heating. The low-temperature heating capacity and low-temperature heating power consumption shall comply with the provisions of 5.4.5 and 5.4.6.Measure the operating current and power factor at the same time. 6.3.2.4 Maximum cooling load The package operates at the rated voltage and rated frequency and the maximum The electrical strength test of the package shall comply with the following provisions. a) A basic sinusoidal voltage with a frequency of 50 Hz is applied between the live parts and the non-live metal parts of the package. The test voltage value is 1000 V + 2 times the rated voltage value; the test time is 1 min. The test time can also be 1 s, but the test voltage value shall be 1.2 times (1000 V + 2 times the rated voltage value); b) If the motor has been subjected to an electrical strength test by the manufacturer and a testing report has been issued, the motor does not need to be tested for this item; c) Components that have been subjected to electrical strength tests do not need to be tested again; d) Within the voltage range of the control circuit, electronic devices used in control circuits with a voltage value to ground of less than 30 V DC can be exempted from electrical strength tests. 6.3.5.3 Grounding device The grounding device of the package shall be tested in the following ways. a) The provisions of the package protective grounding device shall be judged by visual inspection and manual test to determine whether it is qualified; b) The provisions of the package protective grounding terminal and protective grounding screw shall be judged by visual inspection and manual test, to determine whether it is qualified; c) The test of the continuity of the protective grounding circuit shall be verified by 12 V voltage of 50 Hz or 60 Hz from PELV (protection extra low voltage) power supply, at least 10 A circuit for at least 10 s. The test shall be carried out between the grounding terminal and the relevant points of the protective grounding circuit components. 6.3.5.4 Leakage current at operating temperature The test method for leakage current at operating temperature of the package shall comply with the provisions of Chapter 13 of GB 4706.1-2005. 6.3.6 Salt spray test The salt spray test of the electroplated parts of the package shall be carried out in accordance with the provisions of GB/T 2423.17; the test cycle is 24 h. Before the test, the surface of the electroplated parts shall be cleaned and degreased; after the test, the salt remaining on the surface shall be washed off with clean water, then the corrosion of the electroplated parts shall be checked. 6.3.7 Coating adhesion test Select an area of 10 mm × 10 mm on the outer surface of the coated part; use a new blade to make 11 parallel cuts at a spacing of 1 mm and a depth to the substrate. Use medical zinc oxide tape to firmly stick to the scratched part; then quickly tear off the tape along the direction of one group of scratches. Check the number of grids where the paint film falls off within the scratch range (each grid where the paint film retains less than 70% is considered to have fallen off); evaluate the adhesion with a ratio to 100. 6.3.8 Detection of harmful substance content The detection of harmful substance content in the package shall be carried out in accordance with the provisions of GB/T 26572; the results shall comply with the provisions of 5.1.15. 6.3.9 Variable working condition test The package operates within the temperature range given in Table 4.When one temperature condition is fixed and another temperature condition is changed (the other is based on the flow rate and temperature conditions under nominal operating conditions), its cooling (heating) capacity and corresponding power consumption are measured. The test results are plotted as a curve or compiled into a table. Each curve or each table shall contain no less than 4 measuring points. 6.3.10 Protection degree test The splash water test is carried out according to the IPX4 level in GB/T 4208-2017. Immediately after the test, the insulation resistance test of 6.3.5.1 and the electrical strength test of 6.3.5.2 are carried out. 7 Inspection rules 7.1 General requirements Each package shall be inspected and qualified by the manufacturer's quality inspection department before it can exit factory. 7.2 Inspection categories The inspection is divided into exit-factory inspection, sampling inspection, type inspection. The inspection items, technical requirements, test methods shall be in accordance with the provisions of Table 11. 7.3 Exit-factory inspection - Product model and name; - Product exit-factory number; - Manufacturer name; - Inspection conclusion; - Signature and date of the inspector and the person in charge of inspection. The contents of the product manual shall include. - Product model and name, working principle, scope of application, implementation standards, main technical parameters (in addition to the main technical performance parameters indicated on the nameplate, it shall also include the pressure loss on the cold (hot) water side, auxiliary electric heating power, the head, flow and power of the circulating water pump, the maximum operating current, etc.); - Product structural diagram, system diagram, electrical schematic diagram, wiring diagram; - Installation instructions and requirements (the installation of packages using flammable refrigerants shall comply with the provisions of GB/T 9237); - Instructions for use, maintenance and precautions (the repair and maintenance of packages using flammable refrigerants shall comply with the provisions of Appendix DD in GB 4706.32-2012, in addition to the requirements of GB/T 9237). 8.3 Transportation and storage 8.3.1 The package shall not be collided, tilted or exposed to rain and snow during transportation and storage. 8.3.2 The package shall be charged or maintained with the specified refrigerant amount before leaving the factory, or charged with dry nitrogen at 0.02 MPa ~ 0.03 MPa (gauge pressure). 8.3.3 The product shall be stored in a dry and well-ventilated place; attention shall be paid to moisture-proofing of the electrical system. Appendix A (Normative) Requirements for heating performance test of low ambient temperature air source heat pump (chilling water) package A.1 Test process summary The heating performance test process of the package includes three stages. pretreatment stage, balance stage, data acquisition stage. A.2 Pretreatment stage A.2.1 When the package reaches a stable operating state (see Note 3 of 6.2.1), the test enters the pretreatment stage and continues to run for at least 10 minutes. A.2.2 If a defrosting process is performed before the end of the pretreatment stage, the test shall be restarted after the defrosting process is completed and the package returns to a stable operating state and the heating operation shall continue for more than 10 minutes. A.2.3 The pretreatment stage can be terminated by automatic defrosting or manual defrosting. A.3 Balance stage A.3.1 After the pretreatment stage, the test immediately enters the balance stage. A.3.2 The duration of the balance stage shall be no less than 1 h. A.3.3 During the balance stage, the parameters of the test conditions shall meet the reading tolerances specified in Table A.1. A.4 Data collection stage A.4.1 After the balance stage, the test immediately enters the data collection stage. A.4.2 Collect the required data according to the requirements of GB/T 10870-2014 and calculate the heating capacity of the heat pump unit. A.4.3 An integral electric power meter or test system shall be used to measure the power consumption of the heat pump unit. A.4.4 The average temperature difference change rate ΔTi (τ) of the inlet and outlet water on the computer side shall be calculated within the first 35 minutes of the data ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.