GB/T 25127.2-2020 English PDF (GB/T25127.2-2020)

GB/T 25127.2-2020: Low ambient temperature air source heat pump (water chilling) packages - Part 2: Heat pump (water chilling) packages for household and similar application
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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-temperatur...