GB/T 22257-2008General specification for mobile air conditioner (English PDF)

5.2 Performance requirements

5.2.1 Sealing performance of cooling system Under normal refrigerant charge, when using a leak detector which has a does not reset, BUT it resets within not more than 30 min after shutdown, it will continue to run for 1 hour.

5.2.7.4 For a manually reset overload protector, if it trips within the first 5 min, it shall be reset forcibly after 10 min of tripping; meanwhile it shall be able to operate continuously for another 1 h.

5.2.8 Cooling at minimum operation When tested according to 6.8, during the 4 hours operation of the air conditioner after the 10 min start-up period, the safety device shall not trip; the frosting area on the windward surface of the indoor side evaporator shall not be greater than 50% of the windward area of the evaporator.

Note 1: An automatic resettable protector, that automatically controls the on and off of the compressor to prevent freezing, is not regarded as a safety device.

Note 2: When the frosting area on the windward surface of the evaporator is not easy to see, it can be judged by the air volume (not less than 25% of the initial air volume).

5.2.9 Condensation When tested according to 6.9, the air conditioner shall meet the following requirements:

a) Condensation on the outer surface of the box shall not drip;

b) Indoor air supply shall not carry water droplets.

5.2.10 Condensate removal capacity When tested according to 6.10, the air conditioner shall have the ability to remove condensed water. There shall be no water spilling or blowing out of the air conditioner on the indoor side, so as not to wet the conditioned environment in the sealed space, room or area.

5.2.11 Heating of heat pump at maximum operation

5.2.11.1 When tested according to 6.11, the parts of the air conditioner shall not be damaged; the air conditioner shall be able to operate normally.

5.2.11.2 During the 1 h continuous operation of the air conditioner, its motor's overload protector shall not trip.

5.2.11.3 When the air conditioner stops operation for 3 minutes, it restarts for continuous operation for 1 h; however, in the first 5 min of starting operation, the motor's overload protector is allowed to trip, but no action is allowed thereafter. In the first 5 minutes of operation, if the motor's overload protector of the heating capacity of heat pump is stable, measure the input power of the additional electric heating device.

6.6.2 Under the rated heating conditions of electric heating, set the air conditioner to a condition such, that the electric heating device is at the maximum power consumption working state. After the operation is stable, test the input power of the electric heating device.

6.6.3 When testing under the working conditions of

6.6.1 and 6.6.2, whilst the electric heating device does not operate, set the air conditioner (or as specified by the manufacturer) to make the electric heating device in the working state; after the operation is stable, test the input power of the electric heating device.

6.7 Test of cooling at maximum operation For packaged units, place the unit in a room. Fully close the ventilation gate (if any), which exchanges the air between the indoor and outdoor, of the air conditioner. Adjust the set temperature, fan speed, guide grille to the maximum cooling state. Operate it at a voltage of ±10% of the rated voltage. After reaching to the working condition as specified in Table 6, let it be stable. Then continue operating it for 1 h. Shut it down for 3 min (during which the power supply voltage rises by not more than 3%). Then start and operate it for 1 h. For single split units, the working conditions shall be as specified in Table 6; the rest shall be carried out in accordance with the test method of the cooling at maximum operation in GB/T 7725-2004.

6.8 Test of cooling at minimum operation Completely close the ventilation gate (if any), that exchanges the indoor and outdoor air, of the air conditioner. Adjust its set temperature, fan speed, guide grille to the state that is most likely to cause the evaporator to freeze. Under the cooling work conditions at minimum operation as specified in Table 6, at the rated voltage and frequency, start the air conditioner to run to a stable condition; then continue operation for 4 hours.

6.9 Condensation conditions Adjust the air conditioner's temperature controller, fan speed, damper, guide grille to the most condensable state, without violating the manufacturer's requirements, to perform cooling operation; make it reach the condensation conditions as specified in Table 6. The air conditioner runs continuously for 4 h.

6.10 Test of condensate removal ability Adjust the air conditioner's temperature controller, fan speed, damper, guide grille to the most condensable state. Operate it according to the condensate For packaged units, place the unit in a room. For the air conditioner which is equipped with automatic defrosting device, adjust the temperature controller, fan speed, air door, guide grille to such state, that the heat exchanger is most frost-prone. After stable operation according to the defrost conditions specified in Table 6, continue to run for two complete defrost cycles or run continuously for 3 hours (the total time of the test shall start at the end of the first defrost cycle), until the first completion of the defrost cycle after 3 h, whichever is larger. After the defrosting cycle and immediately after the defrosting, the temperature of the outdoor air shall not rise by more than 5 °C. For single split units, the working conditions shall be as specified in Table 6. The rest shall be carried out according to the automatic defrosting test method in GB/T 7725-2004.

6.15 Noise test When measuring the noise (sound pressure level) of the air conditioner, except for the sampling points in accordance with Appendix B, the others shall, in accordance with the requirements of Appendix B "Determination of noise" in

GB/T 7725-2004, be subjected to the noise test, under the rated cooling conditions and rated (high temperature) heating conditions.

Note 1: The noise test at heating state is only applicable to heat pump type air conditioners.

Note 2: The packaged prototype must be connected to the air duct, which must be made into shortest length. The minimum length of the air duct shall not be less than 500 mm.

6.16 Test of energy efficiency ratio and performance coefficient The test of energy efficiency ratio and performance coefficient shall be carried out in accordance with the rated cooling/heating conditions specified in Table 6, until it is stable.

6.17 Packaging test The packaging of the air conditioner shall be designed in accordance with the moisture-proof packaging required by

GB/T 1019 AND the shock-proof packaging under circulation conditions. The vibration test shall be carried out according to circulation condition 1. The packed air conditioner shall be subjected to a drop test according to the requirements of the following conditions.

6.17.1 The drop height shall be in accordance with Table 7. shall be 100% qualified. If one item is found to be unqualified, the product in the period shall be judged to be unqualified. Samples for type inspection shall be randomly selected from qualified finished products. Samples for type inspection shall not be delivered to the ordering party, as qualified products.

7.5 Product acceptance

7.5.1 The ordering party has the right to check whether the product quality meets the requirements of this standard. When delivery, the ordering party may carry out inspection and acceptance, according to the exit-factory inspection items.

7.5.2 According to the requirements of the ordering party, the supplier can provide a complete type inspection report within one year. The quality index and sampling scheme for acceptance can be mutually agreed upon by both parties. The sampling scheme can also be carried out in accordance with

GB/T 2829. However, if the ordering party is in doubt of the product quality, it may negotiate with the buyer and the manufacturer; it may also add partial items OR all inspection items of the type inspection. If there is dispute, it may be subjected to the statutory department for arbitration.

7.5.3 If the product is stored for more than two years before leaving the factory, it shall be subjected to inspection and acceptance again, according to the exit- factory inspection items.

8.1 Marking

8.1.1 Each air conditioner shall have a durable nameplate, which is fixed on an obvious place.

8.1.2 The nameplate shall clearly indicate the following items:

a) Product model and name;

b) Climate type (Air conditioner of T1 climate type may not be marked);

c) The name of the manufacturer;

d) Main technical parameters (cooling capacity, heating capacity, energy efficiency, noise, indoor discharge air-flow, refrigerant name or code and filling volume, rated current, rated voltage, rated frequency, input power and mass, etc.). The indoor and outdoor units of the split mobile air conditioner shall be marked separately; the indoor unit shall be marked with the required parameters of the whole machine; the outdoor unit shall

8.2.1 The air conditioner shall, before packaging, be cleaned and dried.

8.2.2 The following documents and accessories shall be accompanied to the package of the air conditioner.

8.2.2.1 The product qualification certificate shall include:

a) Product name and model;

b) The exit-factory number of the product;

c) Conclusions of inspection;

d) Inspection seal;

e) Date of inspection.

8.3 Transportation and storage

8.3.1 During transportation and storage, it shall avoid collision, tilt, exposure to rain and snow.

8.3.2 The storage environment conditions of the product shall be in accordance