GB/T 18836-2002Ducted air -- Conditioning (heat pump) units (English PDF)

5.1.7 The action of magnetic exchange valves of heat pump air conditioner shall be

sensitive and reliable, and be able to ensure the normal operation of air conditioners.

5.1.8 The thermal-protective coating of air conditioners shall have good heat insulation

performance, and shall be non-toxic, odor-free and has self-extinguishing function. It shall

have no condensation phenomena on the surface in normal operation.

5.1.9 The parts of air conditioner refrigerating system shall be able to ensure the normal

operation of the whole unit without degradation under the affection of refrigerants,

lubricants and their mixture.

5.1.10 The compressor of air conditioners shall be equipped with measures against

vibration or be equipped with anti-vibration spring washers when being fixed.

5.1.11 Salt-frog resistance of electroplated parts

After the test to electroplated parts is done according to the method in 7.3.22, each rust

spot in the electroplated layer shall not exceed 1 mm2; the electroplated layer of each 100

cm2 shall have at most 2 rust spot and rust stain; when the area is less than 100 cm2, there

shall not be rust spot and rust stain.

5.1.12 Coating adhesion of painted parts

After the test is done according to the method in 7.3.23, the number of shedding of paint

film shall not exceed 15% of the total number.

5.1.13 All parts and materials of air conditioners shall comply with relevant provisions of

their standards respectively, meet the requirements of use performance and ensure safety.

5.1.14 The electrical systems of air conditioners shall be equipped with overload protection,

vacant phase protection (three-phase power) to their motors. When the nominal

refrigerating capacity of air conditioners is larger than 4500 W, the refrigerating system

shall be equipped with necessary protection functions or devices for high voltage, low

voltage and others. If necessary, it shall also has reverse phase protection function or

devices.

5.1.15 The selection of electrical components of air conditioners and installation and wiring

of electric appliances shall comply with requirements of GB 4706.32 -1996 and GB/T

5226.1-1996.

5.2 Performance requirements

5.2.1 Sealing performance of refrigerating system

There shall not be refrigerant leak in each part of the refrigerating system in the test

conducted according to the method in 7.3.1.

In the test conducted according to the method in 7.3.10, the water resistance of heat water

coil shall not be more than 110% of its nominal water resistance.

5.2.11 Maximum load refrigeration operation

a) In the test conducted according to the method in 7.3.11, each part of air conditioners

shall not be damaged and shall be able to operate normally;

b) Air conditioners shall be able to operate normally during the first hour of continuous

operation;

c) Continue to operate air conditioners for 1 hour after 3 minutes of halt; however, it

allows the overload protector to trip off within the first 5 minutes of operation and do

not allow it to trip off after that; when the overload protector does not reset within the

first 5 minutes of operation AND it resets within the period not exceeding 30 minutes

after halt, then it shall continue to operate the air conditioner for 1 h.

d) For manual reset overload protectors, if they trip off within the first 5 minutes, then it

shall be reset forcibly after 10 times when they trip off, they shall be able to operate

for further 1 hour continuously.

5.2.12 Minimum load refrigeration operation

In the test conducted according to the method in 7.3.12, the safety devices of air

conditioners within 4 hours, after the air conditioners starts 10 minutes, shall not trip off;

the area of frost condensed on the interior face surface of the evaporator room shall not

be more than 50% of that of the face surface of evaporator.

5.2.13 Maximum load heating oper...

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