v4 r410a system

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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. - PowerPoint PPT Presentation

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  • Refrigerant Cycle & Commissioning

  • Refrigerant cycleTo indoorFrom indoorGas balanceOil balanceV4 4-Way valve condenser Electronic expansion valve high pressure receiver gas-liquid separator1.Pipe system

  • Cooling:Refrigerant CycleThe accessorial 4-way valve is electrified or power cut according to the capacity requestthe capacity request is highthe capacity request is low

  • Heating:Refrigerant CycleThe solenoid valve (SV3) is on / off according to the capacity requestthe capacity request is highthe capacity request is low

  • Technology Of Refrigerant Control Refrigerant CycleThe refrigerant flow is precisely regulated by two 3.2mm EEV (Electronic expansion valve)A 6.0mm solenoid valve (SV6) is used for accessorial regulationEEV AEEV BSV6One-way valvehigh pressurereceiver2.Refrigerant control

  • Oil Balance TechnologyRefrigerant Cycle3.Oil Balance

  • Refrigerant CyclePipesGas pipe Liquid pipe Oil balance pipe : between oil separatorsGas balance pipe: between gas separators 4.Connection pipes

  • Commission1.Check before startRefrigerant pipe & insulationGastight & vacuum dry All the electric wiring is finished? Wire specification is correct?Power wire are well insulation? Well connection?Additional refrigerant chargeCheck valves

  • Commission1.Check before startRefrigerant pipe & insulationGastight & vacuum dry All the electric wiring is finished? Wire specification are correct?Power wire are well insulation? Well connection?(PQE,XYE,F1F2E,K1K2E)

    Additional refrigerant chargeCheck valves

  • Commission1.Check before startPipes diameters are correct?Pipes are well insulation?Refrigerant pipe & insulationGastight & vacuum dryAdditional refrigerant chargeCheck valves

  • Commission1.Check before startGastight test has been passed?Vacuum dry has been done?Refrigerant pipe & insulationGastight & vacuum dryAdditional refrigerant chargeCheck valves

  • Commission1.Check before startRefrigerant has been charged correctly?Refrigerant pipe & insulationGastight & vacuum dryAdditional refrigerant chargeCheck valves

  • Commission1.Check before startOutdoor valves are opened?All the fans rotate normally?Refrigerant pipe & insulationGastight & vacuum dryAdditional refrigerant chargeCheck valves

  • Commission2.Check OperationAt least 12 hoursError checkTrial operationOperation testHand to user

  • Commission2.Check OperationCheck if theres 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? Error checkTrial operationOperation testHand to user

  • Commission2.Check OperationPower on whole system Check address and capacity code

    The master ODU LED display the total amount of online indoor unitsIf 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

  • Commission2.Check OperationTurn-on all indoor units

    Error checkTrial operationOperation testHand to user

  • Commission2.Check OperationCheck indoor units:Error checkTrial operationOperation testHand to userSetting 17 in cooling modeHigh speedRunning more than 4 hours Check Temp. -> Temp. difference between air intake and outlet of each indoor unit should be bigger than 10

  • Commission2.Check OperationCheck outdoor unit:Discharge and suction temperature of compressorsPressure of systemsRunning currentAny abnormal noise, vibrationRecord the operation parameterError checkTrial operationOperation testHand to user

  • Commission2.Check OperationSystem pressure and temperature checkV4 system at 100% output Cooling mode ( reference data)

    R410AOD35/-,ID27/19OD43/-,ID32/23High pressure (MPa)2.8~3.03.4~3.8Low pressure (MPa)0.85~1.01.0~1.45Discharge temp.()7580/Suction temp.()1114/Indoor air outlet ()12~15 degree (T1 is around 21~27)temp. difference between return and outlet (T)9~12

  • CommissionSystem pressure and temperature checkInverter VRF system at Cooling mode ( reference data)

    R410AOD35/-,ID27/19OD43/-,ID32/23High pressure (MPa)2.8~3.03.4~3.8Low pressure (MPa)0.85~1.01.0~1.45Discharge temp.()7080/Suction temp.()1114/Indoor air outlet ()12~15 degree (T1 is around 21~27)temp. difference between return and outlet (T)9~12

  • Commission2.Check OperationWhen press the check button, the LED will display operating parameters:

  • Commission2.Check OperationPress check button, outdoor PCB LED will displays operation information

    Display stepLED displayRemarkNormal displayNos. of indoor unit, when the unit stands by.Frequency of inverter compressor or output load of digital compressor after unit starts.1st.This outdoor unit address0,1,2,32nd.This outdoor unit capacity8,10,12,14,16(HP)3rd.Number of outdoor units onlineJust be available for main unit4th.Total capacity of outdoor units5th.Total capacity demand of indoor unitsJust be available for main unit6th.Amended capacity demand for the main outdoor unitJust be available for main unit7th.Running modeOff:0 Fan only:1 Cooling:2Heating:3 Forced cooling:4

  • Commission2.Check Operation

    8th.The actual running capacity of this outdoor unit9th.Fan speedOff:0 Low speed:1 High speed:210th.Average temp. of evaporatorActual value11th.Outlet temp. of condenserActual value12th.Environment temp. Actual value13th.Discharge temp. of inverter(DIgital) scroll compressorActual value14th.Discharge temp. of fixed compressor 1#Actual value15th.Discharge temp. of fixed compressor 2#Actual value16th.Current of inerter scroll compressorActual value17th.Current of fixed compressor 1#Actual value18th.Current of fixed compressor 2#Actual value19th.Opening degree of EXV_AActual value820th.Opening degree of EXV_BActual value8

  • Commission2.Check Operation

    21th.Numb. of indoor units connectedActual value22th.The last malfunction or error codeDisplay 00, if no malfunction or error; otherwise the error code23th.--End

  • Commission2.Check OperationDaily operation and maintenance explanationError checkTrial operationOperation testHand to user

  • Thank you!

    *This is V4 refrigerant cycle system. There are 4 main difference. The First one is the compressors. The second one is only one oil separator. The third difference is that here is a oil balance pipe not a gas balance pipe. The fourth difference is SV4.*Oil balance pipe is used to balance the oil volume between outdoor units. Gas balance pipe is used to balance the pressure between gas-liquid separators .

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