Some standard content:
JB/T 8702- 1998
This standard is proposed and managed by the Refrigeration Equipment Standardization Technical Committee of the Ministry of Machinery Industry. The responsible drafting unit of this standard: Changzhou Special Air Conditioner Factory. The drafter of this standard: Wang Keyi.
1 Scope
Machinery Industry Standard of the People's Republic of China
Rooftop air-source condition (heat pump) units
Rooftop air-source condition (heat pump) unitsJB/T 8702—1998
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the integral rooftop air-source condition (heat pump) units driven by electric motors (hereinafter referred to as units). This standard is applicable to centralized air supply units with a cooling capacity of 28~420kW and a heat pump heating capacity of 33~460kW. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB755-87 Basic technical conditions for rotating electrical machines GB1226-86-General pressure gauges
GB4706.1--92 General safety requirements for household and similar electrical appliances GB7373-87 Difluoromethane (F22) for industrial use GB10079--88 Fully enclosed piston refrigeration compressors GB/T 13274--91
GB/T 13275-91
-Technical conditions for axial flow fans for general use
-Technical conditions for centrifugal fans for general use
GB/T 13306--91
1 Labels
GB/T 13384--92
General technical conditions for packaging of electromechanical products
JB/T 3548--91
JB/T 4119-—91
JB4330 --86
R12, R22, R502 thermal expansion valves for refrigeration Solenoid valves for refrigeration
Determination of sound power level of noise in refrigeration and air-conditioning equipment Engineering method JB/T 6411—92
JB 6917—1998
JB/T 6918—93
Axial flow fans for HVAC
Pressure vessels for refrigeration equipment
Metal and glass sintered liquid level gauges and sight glasses for refrigeration JB/T 7230--94#
Four-way solenoid reversing valve for heat pump
JB/T7245-94Stop valve for refrigeration deviceJB/T7659.5-95
5Fin heat exchanger for Freon refrigeration device
JB/T7961-95Pressure and pressure difference controller for refrigeration3Types and basic parameters
3.1Type
Classification by unit function:
a) Single cooling type Unit (not indicated in the model); b) Refrigeration and heat pump heating unit [including units using heat pump heating and electric heating devices at the same time and units using heat pump heating and electric heating devices interchangeably approved by the Ministry of Machinery Industry of the People's Republic of China on March 19, 1998 and implemented on July 1, 1998 (indicated by R in the model); JB/T8702-1998
c) Refrigeration and electric heating combined use unit (indicated by D in the model). 3.2 Model
3.2.1 The unit model representation method is specified as follows: WK
3.2.2 Model example
-Additional code, determined by the manufacturer
Nominal cooling capacity, expressed in Arabic numerals, kw type code, according to 3.1
Basic code for rooftop air-conditioning units
Cooling capacity 116kW single cooling rooftop air-conditioning unit: WK116; Cooling capacity 116kW cooling and heat pump heating rooftop air-conditioning unit: WKR116; Cooling capacity 116kW cooling and electric heating rooftop air-conditioning unit: WKD116. 3.3 Basic parameters
3.3.1 The nominal operating conditions of the unit shall comply with the provisions of Table 1. Table 1 Nominal operating temperature conditions
Cooling operation
Heating operation
Nominal operating conditions
Nominal operating conditions
Indoor air conditions
Dry bulb temperature
Wet bulb temperature
Outdoor air conditions
Dry bulb temperature
1) Applicable to units where wet bulb temperature affects the heat exchange of the condenser (units that use the latent heat of condensed water, etc. as a heat source). Wet bulb temperature
3.3.2 The rated voltage of the single-phase AC power supply at the nominal operating condition of the unit is 220V, the rated voltage of the three-phase AC power supply is 380V, and the rated frequency is 50Hz.
3.3.3 The refrigeration performance coefficient COP at the nominal operating condition of the unit shall comply with the provisions of Table 2. For units with heat pump heating, it shall not be lower than 95% of the value specified in Table 2.
Table 2 Refrigeration performance coefficient at nominal operating conditions
Nominal cooling capacity
≥28～120
>120～320
The minimum external static pressure of the unit shall comply with the provisions of Table 3, and the static pressure at the return air inlet of the unit shall not be positive pressure. Table 3 Minimum external static pressure of the unit
Nominal operating cooling capacity
>30～60
≥60～100
≥100～160
>160~240
>240～320
1) Static pressure value at the air outlet of the unit after overcoming its own resistance994
Minimum external static pressure1
4 Technical requirements
4.1 General provisions
JB/T 8702—-1998
The unit shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures (or according to the agreement between the user and the manufacturer).
4.2 Equipment supporting the unit
4.2.1 The compressor motor unit consists of one or more positive displacement compressors and is equipped with the necessary lubrication system. 4.2.2 Condenser (evaporator when heat pump is used for heating): finned condenser. 4.2.3 Evaporator (condenser when heat pump is used for heating): finned evaporator. 4.2.4 Other equipment supporting the unit are:
a) Control equipment required to adjust the cooling capacity of the unit; b) Safety protection equipment required to meet safety regulations; c) Electrical control equipment and related instruments of the unit. 4.3 Main accessories of the unit
4.3.1 The main accessories of the unit shall comply with the provisions of the relevant standards. 4.3.2 The refrigeration compressor shall comply with the following standards or other relevant standards: a) Fully enclosed refrigeration compressors shall comply with the provisions of GB10079; b) Semi-enclosed refrigeration compressors shall comply with the provisions of GB10875. 4.3.3 The motor supporting the unit shall comply with the provisions of GB755. 4.3.4 The pressure vessel of the unit shall comply with the provisions of JB6917. 4.3.5 The condenser of the unit shall comply with the provisions of JB/T7659.5. 4.3.6 The evaporator of the unit shall comply with the provisions of JB/T7659.5. 4.3.7 The centrifugal fan of the unit shall comply with the provisions of GB/T13275. 4.3.8 The axial flow fan of the unit shall comply with the provisions of GB/T13274 or JB/T6411. 4.3.9 The pipeline accessories and safety protection components of the unit shall comply with the following standards: a) The stop valve for refrigeration shall comply with the provisions of JB/T7245 or other relevant standards; b) The solenoid valve for refrigeration shall comply with the provisions of JB/T4119 or other relevant standards; c) The four-way solenoid reversing valve for heat pump shall comply with the provisions of JB/T7230 or other relevant standards; d) The pressure and differential pressure controller for refrigeration shall comply with the provisions of JB/T7961 or other relevant standards; e) Thermostatic expansion valve shall comply with the provisions of JB/T3548 or other relevant standards; f) The pressure gauge for refrigeration shall comply with the provisions of GB1226 or other relevant standards; g) The sight glass for refrigeration shall comply with the provisions of JB/T6918 or other relevant standards; h) The safety pressure relief device for the refrigeration system shall comply with the relevant regulations. 4.3.10 The control instrument cabinet and the selected switchgear of the unit shall comply with the provisions of relevant standards. 4.3.11 The refrigerant used in the unit shall comply with the provisions of GB7373 for first-class products, and the new refrigerant for protecting the ozone layer shall comply with the provisions of relevant standards.
4.3.12 The electric heater used in the unit shall comply with the relevant provisions of GB4706.1. 4.3.13 The heat insulation material used in the unit shall be non-toxic, odorless, and have the properties of self-extinguishing and non-deterioration, and shall be firmly pasted or fixed. 4.3.14 The materials of the shell, frame and all connecting pipes in the unit shall comply with the provisions of relevant material standards. The surface of ferrous metal parts shall be treated with anti-corrosion.
4.3.15 The coating of the parts shall have strong adhesion and firm structure, and shall not have bubbles, flow marks, cracks, wrinkles, variegated colors and other defects. 4.3.16 Each pipeline and component in the unit shall have sufficient rigidity and necessary support points to ensure that no friction or collision occurs during operation. 4.4 Air tightness and vacuum test
4.4.1 Air tightness test
JB/T8702—1998
Dry air or nitrogen shall be used for the air tightness test. The test pressure and time shall be in accordance with the manufacturer's regulations, but must comply with the provisions of the relevant standards. There shall be no leakage of refrigerant and oil in all parts of the refrigeration system. 4.4.2 Vacuum test
During the vacuum test, the refrigeration system shall be evacuated to an absolute pressure below 130Pa, and the pressure rise in 24 hours shall not exceed 0.69kPa. 4.5 Unit nominal operating performance
When the unit is operated under nominal conditions of refrigeration and heat pump heating, its maximum deviation shall not exceed the following provisions: a) Refrigeration capacity and heat pump heating capacity shall not be less than 95% of the nominal specified value; b) The total power consumption of refrigeration and heat pump heating shall not be greater than 110% of the nominal power consumption of the unit (the total power consumption of heat pump heating does not include the power consumption of auxiliary electric heating); c) The auxiliary electric heating power consumption of heat pump heating units with auxiliary electric heating shall not be greater than 105% of the nominal power consumption; d) The power consumption of electric heating units shall not be greater than 105% of the nominal power consumption; e) The refrigeration performance coefficient COP of the nominal condition shall not be less than 95% of the value specified in Table 2. 4.6 Unit design and use conditions
The unit shall operate normally under the temperature conditions specified in Table 4 and Table 5. Table 4 Temperature conditions for unit design and use
Nominal working condition
Cooling operation
Heating operation
Maximum load working condition
Low temperature working condition
Condensation working condition
Nominal working condition
Maximum load working condition
Defrosting working condition
Electric heating rated heating working condition
Indoor air state
Dry bulb temperature
When the air conditioner is in cooling operation, the outdoor ambient temperature should not exceed 43℃. Wet bulb temperature
When the air conditioner is in heating (heat recording) operation, the outdoor ambient temperature should not be lower than -5℃. 2
Table 5 Temperature conditions for defrosting
Indoor air conditions
Heat pump heating
Outdoor air conditions
4.6.1 Maximum load conditions
Outdoor air conditions
Dry bulb temperature
Wet bulb temperature
When the unit is operated under the maximum load conditions in Table 4, the motor, electrical components, wiring and other components should work normally. During the maximum load test of heat pump heating, the electric heating equipment is allowed to stop working. 996
4.6.2 Low temperature conditions
JB/T 8702—1998
When the unit is operated under the low temperature conditions in Table 4, the motor and other components should work normally, and their casings should not condense or lose water. 4.6.3 Condensation Conditions
When the unit is operating in condensation conditions, the following requirements shall be met: a) There shall be no condensation on the unit casing;
b) Condensate shall not be blown out of the unit with the wind. 4.6.4 Defrosting Conditions
The unit shall be defrosted according to the temperature conditions in Tables 4 and 5 (when the heat pump unit equipped with an automatic defrosting mechanism is operating, the following requirements shall be met: a) The safety protection components shall not be activated and stop operating; b) The defrosting shall be automatic;
c) The melted water during defrosting and the condensed water of the outdoor heat exchanger during heating operation shall be able to be discharged or processed normally; d) In the continuous operation after the initial defrosting, the total time required for defrosting shall not exceed 20% of the operating cycle time. For units with more than two independent refrigeration cycles, the total defrosting time of each independent cycle shall not exceed 20% of the total operating time of each independent cycle. 4.6.5 Electric Heating Rated Heating Conditions
When the unit's refrigeration system is not operating, the electric heating device is operating. 4.6.6 Variable operating characteristic test
The variable operating temperature conditions of the unit are shown in Table 6. Table 6 Variable operating performance temperature range
Heat pump heating
4.7 Noise and vibration
Indoor air state
Dry bulb temperature
Wet bulb temperature
Outdoor air state
Dry bulb temperature
Wet bulb temperature
4.7.1 The unit shall be measured for noise. When the unit noise value exceeds the noise limit of relevant environmental protection regulations, the unit shall be subjected to noise reduction or sound insulation treatment, and its noise shall be evaluated according to the test value after treatment. 4.7.2 The unit shall be measured for vibration,
4.7.3 The noise and vibration values of the unit shall comply with the manufacturer's regulations and be provided in the product sample. 4.8 Electrical safety regulations
4.8.1 Electrical change performance
When the unit is operated according to the nominal conditions of cooling and heat pump heating in Table 4, the safety protection device should not be activated and stop operating when the rated voltage is changed. In the heat pump heating unit with auxiliary electric heating, the overheating protector should also operate normally without being connected. 4.8.2 Temperature limit
When the unit is operated according to the nominal conditions of cooling and heat pump heating in Table 4, the motor winding temperature should not exceed the provisions of Table 7. The temperature of the connection points and branch points of the power supply wires, the knobs and buttons of the indicators, and the surface temperature of the wooden frame where the human body may touch and the tested product is placed should not exceed the provisions of Table 8. There should be no abnormal temperature rise in other parts. 4.8.3 Insulation resistance
The insulation resistance value between the live parts of the unit and the non-live parts that may be grounded should not be less than 2MQ. 4.8.4 Withstand voltage
After the test in 4.8.3, when the test voltage is applied between the live parts and the non-live parts of the unit, it should be able to withstand the applied test voltage. 997
Measurement part
JB/T 8702—1998
Table? Allowable temperature rise of motor coil
Insulation grade
Table 8 Allowable temperature of shell surface
Measurement location
Connection and branch connection of power cord, etc.
Knobs and buttons of indicators, etc.
Metal, ceramic, glass products
Other products
External surface that human body may contact
Surface of wooden frame where the tested product is placed
4.8.5 Starting performance
When doing the starting test, the starting current value should be less than 115% of the specified starting current value under the nominal working conditions of refrigeration and heat pump heating, and the starting of the motor has nothing to do with the stop position of the motor rotor. 4.8.6 Moisture resistance performance
After the unit is subjected to the moisture resistance test, the insulation resistance should be greater than or equal to 1MQ, and it should comply with the withstand voltage test requirements of 4.8.4. 4.8.7 Water-spraying insulation performance
After the unit is subjected to a water-spraying test in use, the insulation resistance value shall be greater than or equal to 1MQ, and shall comply with the withstand voltage test provisions of 4.8.4.
4.8.8 Grounding
The unit shall have reliable grounding.
4.9 Energy regulation
The unit with a cooling capacity greater than 35kW shall have an energy regulation function, and its regulating device shall be sensitive and reliable. 4.10 Cleanliness
The surfaces in contact with the refrigerant and refrigeration oil in the unit shall be clean and dry, and the weight of the dirt shall be calculated based on the surface area in contact with the refrigerant and shall not exceed 300mg/m2. The outer surface of the unit shall be clean, the coating surface shall be smooth, the installation of pipeline accessories shall be standardized, and the external dimensions shall comply with the design requirements.
4.11 Warranty period
If the user complies with the regulations on product transportation, storage, installation, use and maintenance, the manufacturer shall replace or repair the product free of charge if it is damaged or fails to work properly due to poor manufacturing quality within 18 months from the date of shipment from the manufacturer. 5 Test method
5.1 Measuring instrument accuracy
The type and accuracy of the test instruments and meters shall comply with the requirements of Table 9. 998
Temperature measuring instrument
Flow measuring instrument
Refrigerant pressure measuring instrument
Air pressure measuring instrument
Electricity measurement
Mass measuring instrument
Speed meter
JB/T8702—1998
Table 9 Types and accuracy of instruments and meters
Mercury-in-glass thermometer
Resistance thermometer
Thermocouple
Recording type, indicating type, integrating type
Pressure gauge, transmitter
Barometer, pressure transmitter
Indicating type
Integrating type
Tachometer, stroboscope
1 The accuracy of the pressure measuring instrument used for atmospheric pressure measurement is ±0.1%. 2 The accuracy of the time measuring instrument is ±0.2%. 3 For measuring instruments defined by accuracy, the measured value shall be above 1/2 of the instrument range. 5.2 Unit installation and test regulations
5.2.1 Temperature conditions
Air temperature
Agent temperature
Duct static pressure
The deviation of the dry-bulb and wet-bulb air temperature of the unit shall be in accordance with the provisions of Table 4. The unit under test shall operate under the provisions of rated frequency and rated voltage, and its deviation shall not be greater than ±2% of the rated value. 5.2.2 Environmental conditions
The unit under test shall be installed in accordance with the method specified by the manufacturer. The surrounding environment shall be free of factors that affect the performance of the test unit. 5.3 Test requirements
5.3.1 Main components and main accessories: Check the unit's supporting equipment according to the technical requirements to ensure that it complies with the provisions of 4.2. - The acceptance and inspection of the main accessories shall comply with the provisions of 4.3. Air system, refrigeration system, electrical system, safety control element action test, each component should operate normally, and the adjusted parameters should be stable within the specified range.
5.3.2 Unit air tightness and vacuum test
Air tightness test: The unit refrigerant is tested according to the JB6917 air tightness method at the design pressure, and should comply with the provisions of 4.4.1. Vacuum test: After the unit refrigerant side passes the air tightness test, it is tested according to the JB6917 vacuum test method, and should comply with the provisions of 4.4.2.
5.3.3 Unit nominal operating condition performance test
5.3.3.1 Refrigeration capacity and total power consumption test The energy adjustment of the unit unloading mechanism and other energy adjustment are placed in the maximum refrigeration capacity position, and the refrigeration nominal operating condition is tested according to the provisions of Table 1 and Table 4. The total power consumption should be the total power input of the unit, including the power consumed by the compressor motor, oil heater, condensing fan motor, blower motor, operation control circuit, etc. The measured value shall comply with the provisions of 4.5a) and 4.5b), and the operating current shall be measured and the power factor shall be calculated at the same time. 5.3.3.2 Test of heat pump heating capacity and total power consumption Set the energy adjustment of the unit's unloading mechanism and other energy adjustments to the maximum heating capacity position, and test the heat pump heating nominal operating conditions according to the provisions of Table 1. The total power consumption shall be the total power input to the unit, including the power consumed by the compressor motor, oil heater, condensing fan motor, blower motor, operation control circuit, etc. However, the heating capacity and total power consumption do not include the heating capacity and power consumption of auxiliary electric heating. The measured value shall comply with the provisions of 4.5a) and 4.5b) of JB/T 8702-1998, and the operating current shall be measured and the power factor shall be calculated at the same time. 5.3.3.3 Test of electric power consumption of electric heating of commonly used auxiliary electric heating units When the heat pump heating capacity test is carried out for units with auxiliary electric heating according to 5.3.3.2, the auxiliary electric heating shall be powered on after the heat pump heating capacity is stable, and the consumed electric power shall be measured. The measured value shall comply with the provisions of 4.5c). 5.3.3.4 Test of total power consumption of electric heating rated heating When the refrigeration system of the unit is not running, the electric heating device is placed in the maximum power consumption state, and its input power is measured. The measured value shall comply with the provisions of 4.5d).
5.3.3.5 Refrigeration performance coefficient
The cooling capacity Q. (W) and the total electric power consumption N. (W) measured in 5.3.3.1 are calculated according to formula (1): Qw/kw
The calculation result shall comply with the provisions of Table 2 and 4.5e. 5.3.4 Unit design and use scope test
5.3.4.1 Maximum load condition test
Place the energy adjustment mechanism of the unit in the position of maximum cooling capacity or maximum heating capacity of the heat pump, operate at rated voltage and rated frequency and under the maximum load condition in Table 4, and continue to operate for 2 hours after reaching a stable state, which shall comply with the provisions of 4.6.1. After continuing to operate for 2 hours, disconnect the power supply to stop the compressor for 2 minutes, and reconnect the power supply to start the compressor under the condition that the rated voltage changes by ±10%. The unit should be able to start and work normally.
5.3.4.2 Low temperature condition test
Adjust the unit to the state most prone to ice and frost, and continue to operate for 4 hours at rated voltage and rated frequency and under the low temperature condition specified in Table 4. If the air conditioner has an automatic limit stop device, it should automatically start and stop, which shall comply with the provisions of 4.6.2. The air volume during the test should not be less than 75% of the rated value. During the test and during the defrosting period after the test, all ice and melted water should be collected and discharged by the water tray. 5.3.4.3 Condensation condition test
Under condensation condition, the test shall be carried out according to the following requirements and in accordance with the provisions of 4.6.3. a) After reaching the condensation condition, the air conditioner shall continue to operate for 4 hours; b) During the test, no condensate shall drip from the unit casing or flow out from the fan. 5.3.4.4 Condensate treatment test (may be carried out simultaneously with the condensation condition test) Under condensation condition operation, when the condensate amount reaches equilibrium, continue to operate for 4 hours. During the test, no condensate shall drip from the unit casing or flow out from the fan.
5.3.4.5 Defrosting condition test
Adjust the heat pump air conditioner unit to the state where the outdoor heat exchanger surface is most susceptible to frost and ice formation, and continuously carry out heat pump heating operation under the conditions of the melting box condition in Table 5. After the first defrosting cycle, continue to operate for 3 hours. It shall comply with the provisions of 4.6.4. 5.3.4.6 Test of power consumption of electric heating device For electric heating type air conditioners, under the nominal heating condition of the electric heating device specified in Table 4, the power consumption of the electric heating device shall be measured after the temperature of each part of the air conditioner reaches a stable value.
5.3.5 Test of variable working condition characteristics
When the unit test is changed according to a certain condition in Table 6, the other conditions shall be carried out under the corresponding conditions of the nominal working condition. The test shall include the corresponding working temperature condition points in Table 4. Measure the cooling capacity, heating capacity, input power, etc. of the air conditioner, and draw the test results into a curve graph. Each curve shall have the values of no less than 4 measurement points.
5.3.6 Noise and vibration test
5.3.6.1 Noise measurement
a) When the unit is installed, there should be no objects that hinder air circulation around the air intake and exhaust channels. The measurement is carried out at 1000
of the test in 5.3.3.1;
JB/T 8702--1998
b) Noise measurement is carried out according to the method of measuring the surface of a rectangular hexahedron in JB4330. The measurement positions are measured according to points 1.2, 3, and 4 in Figure B2 and Table B1 in Appendix B of JB4330--86;
c) The sound pressure level is calculated according to the method of average sound pressure level on the surface of JB4330. The test results shall comply with the provisions of 4.7.3. 5.3.6.2 Vibration measurement
The vibration of the unit is measured according to the following method. The test results shall comply with the provisions of 4.7.3. a) Measuring instrument:
一——Instrument requirements: The frequency response range should be 10～500 Hz. The relative sensitivity within this frequency range is based on the relative sensitivity of 80 Hz. The relative sensitivity of other frequencies should be within the range of 10%～20% of the reference sensitivity. The measurement error should be less than ±10%. -——Instrument calibration: The measuring instrument should be calibrated regularly according to relevant standards. b) Installation requirements of the unit: The installation of the unit should meet the requirements of the manufacturer. After installation, the unit should not generate any vibration or resonate with any other objects during operation. The vibration value of the installation foundation during the operation of the unit should be less than 10% of the maximum vibration value of the unit being measured. c) The operating status of the unit during measurement: The unit should be measured under the nominal operating condition. At this time, the speed and voltage of the relevant motor should be at the rated value.
d) Measurement point configuration: The number of measurement points is generally one point, which is configured at the same point in the axial direction, vertical axis, and horizontal axis at the bottom of the frame. e) Measurement requirements: During measurement, the sensor of the measuring instrument should have good contact with the measured point, and a reliable connection should be guaranteed. The vibration value of the unit is based on the maximum data measured at each measuring point. f) Test report: The test report should include the unit model, measurement conditions, manufacturer name, product number and the location of the measurement point with the maximum vibration value.
5.3.7 Electrical safety test
5.3.7.1 Voltage change test: The unit is operated in the nominal conditions of cooling and heating (heat pump) specified in Table 4, and the power supply voltage is operated within the range of rated voltage ±10% for 1 hour, which should comply with the provisions of 4.8.1. 5.3.7.2 Temperature test requirements are as follows:
a) The unit is tested in accordance with 5.3.3.1 or 5.3.3.2 When doing the cooling capacity or heating (heat pump) test, the temperature of the motor winding is measured by the resistance method, which shall comply with the provisions of Table 7;
b) When the unit is tested above, the temperature of the measuring point shown in Table 8 is measured by thermocouples, which shall comply with the provisions of Table 8; c) When the unit is equipped with auxiliary electric heating, the compressor is not running, the temperature switch equipped with the thermostat or automatic reset type is short-circuited, the rated voltage and rated frequency are applied to the electric heater, and it is continuously operated from room temperature until the temperature of each part reaches stability, and the temperature of the measuring point shown in Table 8 is measured by thermocouples, etc., which shall comply with the provisions of Table 8. If the overheat protection device equipped with the unit is activated, the maximum temperature at this time and thereafter shall be measured, and it shall comply with the provisions of Table 8. 5.3.7.3 Insulation resistance test
Before and after the temperature test in 5.3.7.2, the insulation resistance between the live parts of the unit and the non-live parts that may be grounded shall be measured by a 500V insulation resistance meter, which shall comply with the provisions of 4.8.3. 5.3.7.4 Withstand voltage test
After the test in 5.3.7.3, a basic sinusoidal voltage with a frequency of 50H2 is applied between the live parts and the non-live metal parts of the unit for 1 minute, which shall comply with the provisions of 4.8.4. The test voltage is 1500V when the single-phase rated voltage is 220V; 1800V when the three-phase rated voltage is 380V, and 500V when the voltage to ground is less than 30V. When there are no problems in testing the same product in large quantities, this test can be exempted in control circuits below DC 30V. 5.3.7.5 Starting test
a) Starting current test: The unit shall be subjected to tests 5.3.7.3 and 5.3.7.4 immediately after test 5.3.7.2. When the motor rotor is stopped, a voltage value of rated frequency shall be applied. This voltage value is the voltage value measured when the current reaches a value close to the motor current value measured in test 5.3.3.1. The starting current value shall be calculated using formula (2) and shall comply with the provisions of 4.8.5. 1001
Where: Ia—starting current, A;
Locked rotor current at rated voltage, A;
JB/T 8702-1998
Iα= In=I
Locked rotor current at rated voltage close to the motor current value measured in the test of 5.3.3.1, A;-rated voltage, V;
Vr'—-impedance voltage corresponding to current I', V. (2)
Note: When two or more motors are started at the same time, the starting current of the unit is the starting current when power is supplied at the same time or the sum of the starting currents. For the unit starting motors separately, the starting current refers to the maximum current until the last motor is started under the nominal working condition test in Table 4. b) Starting voltage test: After the unit is operated under the nominal working conditions in Table 4, the motor is stopped and the stopping interval time specified by the manufacturer is reached. Then, it is started at 90% of the rated voltage at the rated frequency. This shall comply with the provisions of 4.8.5. c) Heat pump units are operated under the heating nominal working conditions specified in Table 4 and the measurements of 5.3.7.5a) and 5.3.7.5b) are carried out. 5.3.7.6 Humidity resistance test
Immediately after the low temperature test in 5.3.4.2 and the defrost test in 5.3.4.5, the unit shall be subjected to insulation resistance test and withstand voltage test. This shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
5.3.7.7 Water spray insulation test
Under normal use, use the sprinkler in Figure 1 to spray water at a rate of 3mm/min from a direction of about 45° for 1 hour, and then carry out the insulation resistance test in 5.3.7.3 and the withstand voltage test in 5.3.7.4. They shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
During the test, the water spray pressure is such that when the water spray outlet in Figure 1 is facing upward, the water height of the spray flow shall reach 1000mm±100mm. When spraying water, the water spray outlet shall be about 1.3m away from the unit.
Only 4 holes intersecting with the side
+1x101
(hole spacing when unfolded)
Figure 1 Water outlet size
5.3.8 Appearance and external dimensions
a) Appearance: The external dimensions of the unit shall be measured by visual inspection and shall comply with the provisions of 4.10; b) External dimensions: The external dimensions of the unit shall be measured by a ruler and shall comply with the provisions of 4.10. 5.3.9 Test report
5.3.9.1 Record the test parameters and results according to the test contents of 5.3.1~5.3.7, and calculate according to the provisions of the relevant standards. 5.3.9.2 Record the name of the test operator. 6 Inspection rules
6.1 Inspection items
The factory inspection, sampling inspection and type inspection items, technical requirements and test methods of the unit shall be in accordance with the provisions of Table 10. 1002
Ancillary equipment
Main accessories
Air tightness and vacuum test
Insulation resistance
Withstand voltage
Cooling capacity, power consumption
Heating capacity, power consumption
Power consumption of auxiliary electric heating
Power consumption of electric heating
Static pressure outside the machine
Safety control device
Appearance and dimensions
Coefficient of performance C for refrigeration OP
Maximum load test
Low temperature test
Condensation test
Melting test
Condensate test
Variable operating condition test
Noise and vibration test
Voltage change test
Temperature test
Start-up test
Moisture resistance test
Water spray insulation performance test
Factory inspection
Note: △ indicates that the test should be done, and - indicates that the test is not done. 6.2 Factory inspection
JB/T8702-1998
Table 10 Inspection items
Sampling inspection
Type inspection
Each unit should be inspected at the factory. The inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3 Sampling inspection
Technical requirements
3.3.3 and 4.5
6.3.1 The units shall be sampled from the qualified products in the factory inspection, and the inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3.2
The nominal operating conditions of the units for sampling inspection shall be in accordance with the provisions of Table 11. Table 11 Sampling inspection nominal operating condition temperature condition items
Heating (heat pump)
Indoor air state
Dry bulb temperature
Wet bulb temperature
Test method
Outdoor air state
Dry bulb temperature
Wet bulb temperature5. c) Heat pump units are operated under the nominal heating conditions specified in Table 4 and tested as specified in 5.3.7.5a) and 5.3.7.5b). 5.3.7.6 Humidity test
The insulation resistance test and withstand voltage test are carried out immediately after the low temperature test in 5.3.4.2 and the defrost test in 5.3.4.5. The test shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
5.3.7.7 Water spray insulation test
Under normal use conditions, the unit is sprayed with water from a direction of about 45° at a rate of 3mm/min using the sprayer shown in Figure 1 for 1 hour. The insulation resistance test in 5.3.7.3 and the withstand voltage test in 5.3.7.4 are carried out. The test shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
When the water pressure is tested, the height of the water jet should reach 1000mm±100mm when the water jet is directed upwards as shown in Figure 1. The distance between the water jet and the unit should be about 1.3m.
There are only 4 holes intersecting the edge
+1x101
(hole spacing when unfolded)
Figure 1 Water jet size
5.3.8 Appearance and external dimensions
a) Appearance: The external dimensions of the unit shall be visually inspected and shall comply with the provisions of 4.10; b) External dimensions: The external dimensions of the unit shall be measured with a ruler and shall comply with the provisions of 4.10. 5.3.9 Test report
5.3.9.1Record the test parameters and results according to the test contents of 5.3.1~5.3.7, and calculate according to the provisions of the corresponding standards. 5.3.9.2Record the name of the test operator. 6 Inspection rules
6.1 Inspection items
The factory inspection, sampling inspection and type inspection items, technical requirements and test methods of the unit shall be in accordance with the provisions of Table 10. 1002
Ancillary equipment
Main accessories
Air tightness and vacuum test
Insulation resistance
Withstand voltage
Cooling capacity, power consumption
Heating capacity, power consumption
Power consumption of auxiliary electric heating
Power consumption of electric heating
Static pressure outside the machine
Safety control device
Appearance and dimensions
Coefficient of performance C for cooling OP
Maximum load test
Low temperature test
Condensation test
Melting test
Condensate test
Variable operating condition test
Noise and vibration test
Voltage change test
Temperature test
Start-up test
Moisture resistance test
Water spray insulation performance test
Factory inspection
Note: △ indicates that the test should be done, and - indicates that the test is not done. 6.2 Factory inspection
JB/T8702-1998
Table 10 Inspection items
Sampling inspection
Type inspection
Each unit should be inspected at the factory. The inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3 Sampling inspection
Technical requirements
3.3.3 and 4.5
6.3.1 The units shall be sampled from the qualified products in the factory inspection, and the inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3.2
The nominal operating conditions of the units for sampling inspection shall be in accordance with the provisions of Table 11. Table 11 Sampling inspection nominal operating condition temperature condition items
Heating (heat pump)
Indoor air state
Dry bulb temperature
Wet bulb temperature
Test method
Outdoor air state
Dry bulb temperature
Wet bulb temperature5. c) Heat pump units are operated under the heating nominal operating conditions specified in Table 4 and tested as specified in 5.3.7.5a) and 5.3.7.5b). 5.3.7.6 Humidity test www.bzxz.net
The insulation resistance test and withstand voltage test are carried out immediately after the low temperature test in 5.3.4.2 and the defrost test in 5.3.4.5. The test shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
5.3.7.7 Water spray insulation test
Under normal use conditions, the unit is sprayed with water from a direction of about 45° at a precipitation rate of 3mm/min using the sprayer shown in Figure 1 for 1 hour. The insulation resistance test in 5.3.7.3 and the withstand voltage test in 5.3.7.4 are carried out. The test shall comply with the provisions of 4.8.3 and 4.8.4 respectively.
When the water pressure is tested, the height of the water jet should reach 1000mm±100mm when the water jet is directed upwards as shown in Figure 1. The distance between the water jet and the unit should be about 1.3m.
There are only 4 holes intersecting the edge
+1x101
(hole spacing when unfolded)
Figure 1 Water jet size
5.3.8 Appearance and external dimensions
a) Appearance: The external dimensions of the unit shall be visually inspected and shall comply with the provisions of 4.10; b) External dimensions: The external dimensions of the unit shall be measured with a ruler and shall comply with the provisions of 4.10. 5.3.9 Test report
5.3.9.1Record the test parameters and results according to the test contents of 5.3.1~5.3.7, and calculate according to the provisions of the corresponding standards. 5.3.9.2Record the name of the test operator. 6 Inspection rules
6.1 Inspection items
The factory inspection, sampling inspection and type inspection items, technical requirements and test methods of the unit shall be in accordance with the provisions of Table 10. 1002
Ancillary equipment
Main accessories
Air tightness and vacuum test
Insulation resistance
Withstand voltage
Cooling capacity, power consumption
Heating capacity, power consumption
Power consumption of auxiliary electric heating
Power consumption of electric heating
Static pressure outside the machine
Safety control device
Appearance and dimensions
Coefficient of performance C for cooling OP
Maximum load test
Low temperature test
Condensation test
Melting test
Condensate test
Variable operating condition test
Noise and vibration test
Voltage change test
Temperature test
Start-up test
Moisture resistance test
Water spray insulation performance test
Factory inspection
Note: △ indicates that the test should be done, and - indicates that the test is not done. 6.2 Factory inspection
JB/T8702-1998
Table 10 Inspection items
Sampling inspection
Type inspection
Each unit should be inspected at the factory. The inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3 Sampling inspection
Technical requirements
3.3.3 and 4.5
6.3.1 The units shall be sampled from the qualified products in the factory inspection, and the inspection items and test methods shall be in accordance with the provisions of Table 10. 6.3.2
The nominal operating conditions of the units for sampling inspection shall be in accordance with the provisions of Table 11. Table 11 Sampling inspection nominal operating condition temperature condition items
Heating (heat pump)
Indoor air state
Dry bulb temperature
Wet bulb temperature
Test method
Outdoor air state
Dry bulb temperature
Wet bulb temperature
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