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V4 R410A System

V4 R410A System. Refrigerant Cycle & Commissioning. Refrigerant cycle. 1.Pipe system. V4. condenser. Electronic expansion valve. 4-Way valve. To indoor. high pressure receiver. Oil separator. From indoor. Oil balance. Gas balance. gas-liquid separator. Compressors.

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V4 R410A System

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  1. V4 R410ASystem Refrigerant Cycle & Commissioning

  2. Refrigerant cycle 1.Pipe system V4 condenser Electronic expansion valve 4-Way valve Toindoor high pressure receiver Oil separator Fromindoor Oil balance Gas balance gas-liquid separator Compressors

  3. Refrigerant Cycle Cooling: The accessorial 4-way valveis electrified or power cut according to the capacity request the capacity request is high the capacity request is low

  4. Refrigerant Cycle Heating: The solenoid valve (SV3)is on / off according to the capacity request the capacity request is high the capacity request is low

  5. Refrigerant Cycle 2.Refrigerant control Technology Of Refrigerant Control • The refrigerant flow is precisely regulated by two Φ3.2mm EEV (Electronic expansion valve) • A Φ6.0mm solenoid valve (SV6) is used for accessorial regulation SV6 One-way valve high pressure receiver EEV A EEV B

  6. Refrigerant Cycle 3.Oil Balance Oil Balance Technology

  7. Refrigerant Cycle 4.Connection pipes Pipes Liquid pipe Oil balance pipe Gas balance pipe Gas pipe Oil balance pipe : between oil separators Gas balance pipe: between gas separators

  8. Commission 1.Check before start Power wire /Signal wire All the electric wiring is finished? Wire specification is correct? Power wire are well insulation? Well connection? Refrigerant pipe & insulation Gastight & vacuum dry Additional refrigerant charge Check valves

  9. Commission 1.Check before start Power wire /Signal wire All the electric wiring is finished? Wire specification are correct? Power wire are well insulation? Well connection? (PQE,XYE,F1F2E,K1K2E) Refrigerant pipe & insulation Gastight & vacuum dry Additional refrigerant charge Check valves

  10. Commission 1.Check before start Power wire /Signal wire Refrigerant pipe & insulation Pipes diameters are correct? Pipes are well insulation? Gastight & vacuum dry Additional refrigerant charge Check valves

  11. Commission 1.Check before start Power wire /Signal wire Refrigerant pipe & insulation Gastight & vacuum dry Gastight test has been passed? Vacuum dry has been done? Additional refrigerant charge Check valves

  12. Commission 1.Check before start Power wire /Signal wire Refrigerant pipe & insulation Gastight & vacuum dry Additional refrigerant charge Refrigerant has been charged correctly? Check valves

  13. Commission 1.Check before start Power wire /Signal wire Refrigerant pipe & insulation Gastight & vacuum dry Additional refrigerant charge Check valves Outdoor valves are opened? All the fans rotate normally?

  14. Commission 2.Check Operation Preheat At least 12 hours Error check Trial operation Operation test Hand to user

  15. Commission 2.Check Operation Preheat Error check Check if there’s any error code display on the PCB of IDU or ODU? Check if the Qty. of IDUs on the ODU LED display is same with actual Qty. or not? Trial operation Operation test Hand to user

  16. Commission 2.Check Operation • Power on whole system ，Check address and capacity code • The master ODU LED display the total amount of online indoor units • If display No. is not equal to the real Qty. • ->Some indoor units have same address or communication wire have problem. • AMR03Y display the total amount of indoor units • AMR02Y display the total amount of outdoor units

  17. Commission 2.Check Operation Preheat Error check Trial operation Turn-on all indoor units Operation test Hand to user

  18. Commission 2.Check Operation Preheat Check indoor units: Error check • Setting 17℃ in cooling mode • High speed • Running more than 4 hours • Check Temp. • -> Temp. difference between air intake and outlet of each indoor unit should be bigger than 10℃。 Trial operation Operation test Hand to user

  19. Commission 2.Check Operation Preheat • Check outdoor unit: • Discharge and suction temperature of compressors • Pressure of systems • Running current • Any abnormal noise, vibration • Record the operation parameter Error check Trial operation Operation test Hand to user

  20. Commission 2.Check Operation System pressure and temperature check V4 system at 100% output Cooling mode( reference data)

  21. Commission System pressure and temperature check Inverter VRF system at Cooling mode( reference data)

  22. Commission 2.Check Operation LED display and Check button When press the check button, the LED will display operating parameters:

  23. Commission 2.Check Operation Press “check” button, outdoor PCB LED will displays operation information

  24. Commission 2.Check Operation

  25. Commission 2.Check Operation

  26. Commission 2.Check Operation Preheat Error check Trial operation Operation test Hand to user Daily operation and maintenance explanation

  27. Thank you!

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