v4 r410a system

Refrigerant Cycle & Commissioning

Refrigerant cycle

To indoor

From indoor

Gas balance

Oil balance

Oil separator Oil separator

V4V4

CompressorsCompressors

4-Way valve 4-Way valve

condenser condenser Electronic expansion valve Electronic expansion valve

high pressure receiver high pressure receiver

gas-liquid separator gas-liquid separator

1.Pipe system

Cooling:

Refrigerant Cycle

The accessorial 4-way valve is electrified or power cut according to the capacity request

the capacity request is high the capacity request is low

Heating:

Refrigerant Cycle

The solenoid valve (SV3) is on / off according to the capacity request

the capacity request is high the capacity request is low

Technology Of Refrigerant Control

Refrigerant Cycle

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

EEV A

EEV B

SV6 One-way valve

high pressurereceiver

2.Refrigerant control

Oil Balance Technology

Refrigerant Cycle 3.Oil Balance

Refrigerant Cycle

Oil balance pipeOil balance pipe

Gas balance pipe Gas balance pipe

PipesPipes

Gas pipe Gas pipe

Liquid pipe Liquid pipe

Oil balance pipe : between oil separatorsGas balance pipe: between gas separators

4.Connection pipes

Commission 1.Check before start

Power wire / Signal wire

Refrigerant pipe & insulationRefrigerant pipe & insulation

Gastight & vacuum dryGastight & vacuum dry

1. All the electric wiring is finished?

2. Wire specification is correct?

3. Power wire are well insulation?

4. Well connection?

Additional refrigerant chargeAdditional refrigerant charge

Check valvesCheck valves





1. All the electric wiring is finished?

2. Wire specification are correct?

3. Power wire are well insulation?

4. Well connection?

(PQE,XYE,F1F2E,K1K2E)




1. Pipes diameters are correct?

2. Pipes are well insulation?







1. Gastight test has been passed?

2. Vacuum dry has been done?







Refrigerant has been charged

correctly?







1. Outdoor valves are opened?

2. All the fans rotate normally?






Commission 2.Check Operation

At least 12 hoursPreheat

Error checkError check

Trial operationTrial operation

Operation testOperation test

Hand to userHand to user


1. Check if there’s any error code

display on the PCB of IDU or ODU?

2. Check if the Qty. of IDUs on the

ODU LED display is same with

actual Qty. or not?

Preheat






Power 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


Turn-on all indoor units

Preheat






1. Check indoor units:

Preheat





Setting 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℃。


2. Check outdoor unit:

Discharge and suction

temperature of compressors

Pressure of systems

Running current

3. Any abnormal noise, vibration

4. Record the operation parameter

Preheat






R410A

OD35/-,ID27/19 OD43/-,ID32/23

High pressure (MPa) 2.8~3.0 3.4~3.8

Low pressure (MPa) 0.85~1.0 1.0~1.45

Discharge temp.( )℃ 75 ～ 80 /

Suction temp.( )℃ 11 ～ 14 /

Indoor air outlet ( )℃ 12~15 degree (T1 is around 21~27)

temp. difference between return and outlet (ΔT)

9~12

System pressure and temperature check

V4 system at 100% output Cooling mode ( reference data)V4 system at 100% output Cooling mode ( reference data)

CommissionSystem pressure and temperature check

Inverter VRF system at Cooling mode ( reference data)Inverter VRF system at Cooling mode ( reference data)

R410A

OD35/-,ID27/19 OD43/-,ID32/23

High pressure (MPa) 2.8~3.0 3.4~3.8

Low pressure (MPa) 0.85~1.0 1.0~1.45

Discharge temp.( )℃ 70 ～ 80 /

Suction temp.( )℃ 11 ～ 14 /

Indoor air outlet ( )℃ 12~15 degree (T1 is around 21~27)

temp. difference between return and outlet (ΔT)

9~12


LED display and Check buttonLED display and Check button

When press the check button, the LED will display operating parameters: When press the check button, the LED will display operating parameters:


Press “check” button, outdoor PCB LED will displays operation information

Display step LED display Remark

Normal display

Nos. 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 address 0,1,2,3

2nd. This outdoor unit capacity 8,10,12,14,16(HP)

3rd. Number of outdoor units online Just be available for main unit

4th. Total capacity of outdoor units

5th. Total capacity demand of indoor units Just be available for main unit

6th. Amended capacity demand for the main outdoor unit Just be available for main unit

7th. Running mode Off:0 Fan only:1 Cooling:2

Heating:3 Forced cooling:4


8th. The actual running capacity of this outdoor unit

9th. Fan speed Off:0 Low speed:1

High speed:2

10th. Average temp. of evaporator Actual value

11th. Outlet temp. of condenser Actual value

12th. Environment temp. Actual value

13th. Discharge temp. of inverter(DIgital) scroll compressor Actual value

14th. Discharge temp. of fixed compressor 1# Actual value

15th. Discharge temp. of fixed compressor 2# Actual value

16th. Current of inerter scroll compressor Actual value

17th. Current of fixed compressor 1# Actual value

18th. Current of fixed compressor 2# Actual value

19th. Opening degree of EXV_A Actual value×8

20th. Opening degree of EXV_B Actual value×8


21th. Numb. of indoor units connected Actual value

22th. The last malfunction or error codeDisplay ‘00’, if no malfunction or error; otherwise the error code

23th. -- End


Daily operation and maintenance

explanation

Preheat





Thank you!Thank you!Thank you!Thank you!

v4 r410a system

Documents

check operationat

check operationpower

check operationturn

pipe systemcooling

system check address

oil separatorsgas balance

highthe capacity request

power wire