13. Air Conditioner Performance Coefficient and Energy Efficiency Ratio:

 

    - National Standards for Testing Nominal Cooling Capacity: Indoor dry bulb temperature at 27°C, wet bulb temperature at 19.5°C; outdoor dry bulb temperature at 35°C, wet bulb temperature at 24°C.

 

    - National Standards for Testing Nominal Heating Capacity: Indoor dry bulb temperature at 20°C, wet bulb temperature at 15°C; outdoor dry bulb temperature at 7°C, wet bulb temperature at 6°C.

    - (National standards also allow actual cooling/heating capacity to be up to 8% lower than nominal values.)

 

14. Air Conditioner Performance Coefficient (EER)：

 

    - Refers to the ratio of cooling capacity to total power consumption during cooling operation:

 

     EER = Actual Cooling Capacity / Actual Power Consumption (W / W) = Nominal Cooling Capacity / Nominal Input Power (W / W).

 

    - The physical significance of the performance coefficient is that it indicates the amount of cooling generated per watt of electricity consumed. Therefore, the higher the performance coefficient of an air conditioner, the less electricity is consumed to produce the same amount of cooling.

 

15. Air Conditioner Energy Efficiency Ratio (COP):

 

    - Refers to the ratio of heating capacity to total power consumption during heating operation:

 

      COP = Actual Heating Capacity / Actual Power Consumption (W / W) = Nominal Heating Capacity / Nominal Input Power (W / W).

 

    - The physical significance of the energy efficiency ratio is that it indicates the amount of heating generated per watt of electricity consumed. Therefore, the higher the energy efficiency ratio of an air conditioner, the more energy-efficient it is in producing the same amount of heat.

 

II. Selection, Installation, and Routine Maintenance of Air Conditioners

 

1. Voltage Range for Air Conditioners:
 

   - Fixed-Speed Air Conditioners**: Voltage range of 198-242V.

 

   - Inverter Air Conditioners**: Voltage range of 187-242V, capable of ultra-low voltage startup at 150V.

 

2. Simple Fault Detection for Air Conditioners:

 

   - Check if the power supply is working and whether the voltage is within the normal range.

 

   - Check if the remote control batteries have power.

 

   - Verify if the set parameters are correct.

 

   - Ensure there is no electromagnetic interference near the indoor unit, which might affect the remote control signal.

 

3. Determining Cooling Capacity of Air Conditioners:

 

   - For a standard room with a ceiling height of 2.7 meters, ceiling height of 2.4 meters, and window area of 1.8 meters * 1.8 meters, with insulation measures and good sealing, the cooling load per square meter is 130W. However, due to factors such as city, orientation, and floor level, general customers can estimate it at 160W/square meter.

 

4. Selection Requirements for Air Conditioner Sockets:

 

   - Generally, wall-mounted units and cabinet units below 2P require a 10-16A socket.

 

   - Cabinet units above 2P require a 25-30A socket, with reliable grounding and located close to the air conditioner plug.

 

   - Air conditioners must use a dedicated fixed socket, and no other appliances should be connected to the socket.

 

5. Power Supply Wiring Requirements for Air Conditioners:

 

   - The main power line should not be less than 10 square millimeters.

 

   - The air conditioner should have a dedicated branch circuit with a capacity of at least 1.5 times the maximum current of the air conditioner.

 

   - (For units below 2P, 2.5-4 square millimeters of single-core copper wire should be used, and for units above 2P, 6 square millimeters of single-core copper wire should be used.)