Refrigerant Cycle & Commissioning
Feb 02, 2016
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
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 are correct?
3. Power wire are well insulation?
4. Well connection?
(PQE,XYE,F1F2E,K1K2E)
Additional refrigerant chargeAdditional refrigerant charge
Check valvesCheck valves
Commission 1.Check before start
1. Pipes diameters are correct?
2. Pipes are well insulation?
Power wire / Signal wire
Refrigerant pipe & insulationRefrigerant pipe & insulation
Gastight & vacuum dryGastight & vacuum dry
Additional refrigerant chargeAdditional refrigerant charge
Check valvesCheck valves
Commission 1.Check before start
1. Gastight test has been passed?
2. Vacuum dry has been done?
Power wire / Signal wire
Refrigerant pipe & insulationRefrigerant pipe & insulation
Gastight & vacuum dryGastight & vacuum dry
Additional refrigerant chargeAdditional refrigerant charge
Check valvesCheck valves
Commission 1.Check before start
Refrigerant has been charged
correctly?
Power wire / Signal wire
Refrigerant pipe & insulationRefrigerant pipe & insulation
Gastight & vacuum dryGastight & vacuum dry
Additional refrigerant chargeAdditional refrigerant charge
Check valvesCheck valves
Commission 1.Check before start
1. Outdoor valves are opened?
2. All the fans rotate normally?
Power wire / Signal wire
Refrigerant pipe & insulationRefrigerant pipe & insulation
Gastight & vacuum dryGastight & vacuum dry
Additional refrigerant chargeAdditional refrigerant charge
Check valvesCheck valves
Commission 2.Check Operation
At least 12 hoursPreheat
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
Commission 2.Check Operation
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
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
Commission 2.Check Operation
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
Commission 2.Check Operation
Turn-on all indoor units
Preheat
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
Commission 2.Check Operation
1. Check indoor units:
Preheat
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
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℃。
Commission 2.Check Operation
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
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
Commission 2.Check Operation
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
Commission 2.Check Operation
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:
Commission 2.Check Operation
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
Commission 2.Check Operation
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
Commission 2.Check Operation
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
Commission 2.Check Operation
Daily operation and maintenance
explanation
Preheat
Error checkError check
Trial operationTrial operation
Operation testOperation test
Hand to userHand to user
Thank you!Thank you!Thank you!Thank you!