GB/T 25127.2-2020 PDF English
Search result: GB/T 25127.2-2020 English: PDF (GB/T25127.2-2020)
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
GB/T 25127.2-2020 | English | 275 |
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 25127.2-2010 | English | 85 |
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 |
BUY with any currencies (Euro, JPY, GBP, KRW etc.): GB/T 25127.2-2020 Related standards: GB/T 25127.2-2020
PDF Preview: GB/T 25127.2-2020
PDF Preview: GB/T 25127.2-2010
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.
|