1. Refrigerant system of Inverter R-410A

2. www.saijo- denki.co.th Model type Model : Stand Model : Duct Model : Cassette Model : Wall mount Model : Wall and ceiling mount

3. Fan cooling coil Temperature of refrigerant in middle of cooling coil. Room temperature Temperature of refrigerant in middle of hot coil Temperature of refrigerant while discharging from compressor Temperature of hot air From hot coil. Fan cooling coil Captube Cooling fan Hot fan Cooling coil Hot coil Compress or

4. System of air condition Outdo or Indoor - Air’s temperature at outdoor side have to be lower than hot coil for good cooling to refrigerant Refrigerant at 60 - 80 C Air inlet 30-40 C Air’s temperature at outdoor side have to be lower than hot coil for cooling to refrigerant

5. - Air’s temperature at outdoor side have to be lower than hot coil for good cooling to refrigerant คอยล์ร้อน Outdo or Indoor Air inlet 30-40 C Hot coil System of air condition

6. Air Cooling coil The refrigerant will pass the cap tube for cool down. - Cooling coil’s temperature should be lower than air inlet. Because it will be useful for cooling to air inlet, the air inlet will turn into cool. Outdo or Indoor Air inlet 21-27 C System of air condition (Normal condition)

7. Compressor working is compressing the low pressure (low temp)refrigerant to be high pressure(high temp). And the electrical power of compressor is “Power Input”. Refrigerant at 60 - 80 C Refrigerant at 7 - 0 C Outdo or Indoor Air inlet 21-27 C System of air condition (Normal condition)

8. Refrigerant at 45 C Compressor work at 100% Refrigerant at 7 C Compressor will compress refrigerant from 7 to 45 C Outdo or Indoor Air inlet 30-40 C System of air condition (Normal condition)

9. Refrigerant’s temperature will decrease to 38 C Compressor work at 50% Refrigerant at 15 C Compressor will compress refrigerant for increasing from 15 to 38 C. It cause to save the electrical charge. Outdo or Indoor Air inlet 30-40 C System of air condition

10. 45 C 38 C 15 C 7 C Work of compressor when BTU 50% are required 100% Air Inverter will help to decrease work of compressor so energy consumption are fewer. it cause to save the energy. System of air condition (Normal condition)

11. Compressor work of fixed speed air condition Room temperature at initial time Room temperature Remote Setting temperature Fixed speed air condition On

12. % Compressor work Room temperature Remote Setting temperature Room temperature Compressor work of inverter air condition

13. Comparison between system and compressor working Current consumption (A) Suction pressure % Compressor work

14. Hold for 5 second Function for refrigerant adaption and inspection system Refrigerant adaption and inspection system should implement at compressor 100% working for reliability. 1. Set the temperature at 15 C 2. Set speed fan at turbo level

15. วงจรของระบบแอร์ Inverter Working at normal condition >Suction pressure is about 130-140 PSI >Current of each model are specified at the label inside of air condition อุณห ภูมิ ความดัน น้ำยา

16. Protection When have some errors

17. Discharge Pipe Over Temperature Protection (Refrigerant’s temperature is over the limit) Working at little refrigerant in system Discharge’s temperature is hotter than normal condition. When discharge’s temperature is more than 100 C, the system will stop compressor working. 10 0 11 0 40 7 pressure temperat ure current

18. Compressor Over Current Protection (Compressor’s current is over the limit) Working at more refrigerant in system Compressor’s current is more than normal condition When current is more than 120 %, the system will decrease compressor working. When current is more than 130 %, the system will stop compressor working. 18 0 60 50 14 temper ature pressure temperat ure current

19. Outdoor Mid Coil Over Temperature Protection (Temperature at middle of hot coil is more over.) When the cooling is mal function such as fan of outdoor unit are stopped, or dirty. Compressor’s current and hot coil’s temperature will be more. When temperature is more than 60 C, the system will decrease compressor working. When temperature is more than 65 C, the system will stop compressor working. 18 0 90 65 14 temper ature pressure temperat ure current