Midea LSBLG365/MCFN Manuale operativo
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
1
Nihao su
Climate solution for green environment
Flooded Type
Water cooled screw chille
r
Technical service manual
LSBLG365~LSBLG1500/MCFN
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
2
Contents
I. Product......................................................................................................................... 3
1. Product Lineup.........................................................................................................................3
2. Nomenclature ...........................................................................................................................3
3. Features ....................................................................................................................................4
4. Operating Range ......................................................................................................................6
5. Specification.............................................................................................................................7
6. Performance Data ....................................................................................................................9
7. System Schematic Diagram ..................................................................................................14
8. Outline Dimension .................................................................................................................14
9. Water Flow..............................................................................................................................14
II. Installation.................................................................................................................. 15
1. Unit Lifting ..............................................................................................................................16
2. Installation Location Select...................................................................................................14
3. Installation Foundation..........................................................................................................16
4. Vibration Isolators..................................................................................................................18
5. Installation of Water Pipeline System ..................................................................................19
III. Electrical Data............................................................................................................ 23
1. Field Wiring.............................................................................................................................23
2. Electric parameter table ........................................................................................................26
3. Control Flow Chart.................................................................................................................27
4. Control Screen Structures ....................................................................................................29
5. Control Screen Operation .....................................................................................................30
6. Introduction of Major Electric Components.........................................................................42
IV. Maintenance and Commissioning............................................................................ 44
1. Commissioning ......................................................................................................................44
2. Maintenance and Service ......................................................................................................51
V. Control........................................................................................................................ 79
1. Description of Energy Adjustment .......................................................................................79
2. Description of Cooling tower fan control.............................................................................81
3. Description of Oil heater control ..........................................................................................81
4. Pump Control .........................................................................................................................83
5. Demand Limit .........................................................................................................................83
6. EXV operation & Wiring.........................................................................................................79
Appendix 1 ....................................................................................................................... 85
Appendix 2 ....................................................................................................................... 86
Appendix 3 ....................................................................................................................... 87
Appendix 4 ....................................................................................................................... 95
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
3
I. Product
1. Product Line Up
2. Nomenclature
Series Model Cooling
Capacity (kW) Picture
Single head
LSBLG365/MCFN 364
LSBLG465/MCFN 465
LSBLG560/MCFN 560
LSBLG750/MCFN 750
Dual head
LSBLG825/MCFN 825
LSBLG925/MCFN 924
LSBLG1120/MCFN 1120
LSBLG1230/MCFN 1230
LSBLG1500/MCFN 1500
LS BLG M C F365
LS: water chiller
BLG: semi-hermetic compressor
365: nominal cooling capacity (kW)
Desi
g
n se
q
uence code
C: R134a
;
omit for R22
F: Flooded evaporator
N
N: Factory mode
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
4
3. Features
Leading technology of twin screw compressor
Midea screw chiller is equipped with the 3rd generation
industrial compressor that has the latest advanced 5-6 asymmetry
dentiform Semi-hermetic Screw Rotors.
The rotors are processed by high-precision CNC and each part
is well-proportioned and none-gap matched, which minimizes the
friction resistance and clearance lost and also guarantees quiet running and good duration.
High Efficiency（with Flooded Evaporator）
New kind of high efficiency finned copper pipe
enhances the heat-exchange process, improves
heat exchange efficiency and makes the evaporator
much more compact for saving installation space.
Significantly improve the evaporating
temperature and reduce heat transferring
temperature difference which directly improves
heat-exchange efficiency, provide most cost effective & reliable solutions to all valuable customers.
Green chiller
R134a environmental-friendly refrigerant
Refrigerant of the Chlorine-free HFC with zero ozone
depletion potential.
Very low GWP (Global Warming Potential).
High reliability and excellent serviceability
Flooded evaporator makes cleaning inside of pipes possible, and guarantees high reliability.
Discharge cut-off valve and liquid line angle valve for simplified maintenance.
Simplified field wiring for easy installation.
Intelligent control & User-friendly Operating Interface
Complete and safe control system: All electrically control elements are designed and selected
with stable quality and reliable function; The unit designed with multiple security measures ensure
the safe and reliable running
The sensors related to control and other assemblies are equipped by factory and strictly tested
Graphical display of the operating state, operation scheduling, malfunction inquiry, help menu
for easy trouble shooting and other user-oriented functions.
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
5
Efficient Lubrication cycle
There are two oil separators which are separately
integrated inside the compressor and condenser. The
refrigerant and oil mixture gets separated in the first oil
separator inside the compressor and then to the second oil
separator of which the separating efficiency can reach 99%. Oil
will return to compressor through the oil return pipe by
pressure difference. Some oil remains in the evaporator will be
sucked up by the Venturi tube and goes back to compressor. These two oil return circuits can
guarantee reliable oil return efficiency.
Reliable throttling device
Orifice baffle with no moving parts can
guarantee high reliability and it cooperates with
EXV（Danfoss ）to throttle the high-pressure
liquid refrigerant from condenser to evaporator.
EXV which is controlled by EVD module
provides high-precision adjustment and
perfectly matches the compressor load，both full load and partial load.
Easy and fast installation
The unit has passed full factory test before being delivered to ensure the reliable working on the
site. The unit can be placed in service only after being connected with power and water supply
during field installation.
The installation and adjustment are simple .Standard flange connection and wire mesh to the
electrical panel. Refrigerant and lubrication oil are provided to the unit in the factory. Only piping
connection and power supply connection are required on the site.
Wide application range
Water cooled screw chiller are widely applied in school, hospital, shopping mall, office as well
as the factory and manufacturing processing area.
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
6
4. Operating Range
Content Running range
Chilled Leaving Water Temperature 5℃～15℃
Cooling Entering water Temperature 20℃~35℃
Water flow volume Rating flow volume±20%
Max inlet/outlet water Temp. difference 8℃
Fouling factor (m2.℃/kW) 0.086
Voltage tolerance Rating Voltage±10%
Phase tolerance ±2％
Power supply frequency Rating frequency±2%
Evaporator max working pressure on water side 1.0MPa
Compressor max. start count 4 times/h
Environment quality High corrosive environment and high
humidity should be avoided.
Drainage system The height of water drainage should not be
higher than the base of the unit on the spot
Normal operation ambient temperature -10℃~45℃
Storage and transport temperature -15℃～50℃
Applicable altitude range：No more than 1000m
LSBLG/MCFN cooler Minimum Maximum
Entering temperature at start-up 9°C 22°C
Leaving temperature during operation 5°C 15°C
Entering/leaving temperature difference at full load 3.8°C 7.1°C
LSBLG/MCFN condenser Minimum Maximum
Entering temperature at start-up 19°C 33°C
Leaving temperature during operation 23°C 40°C
Entering/leaving temperature difference at full load 3.8°C 7.1°C
Changes water temperature curve in the operation:
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
7
5. Specification
Single head:
Item Model
LSBLG365
/MCFN
LSBLG465
/MCFN
LSBLG560
/MCFN
LSBLG750
/MCFN
Cooling Capacity kW 364 465 560 750
RT 103．5 132.3 159.3 213.3
Refrigerant model - R134a
Refrigerant charged kg 210 240 240 250
COP(Kw/kw) 5.87 5.96 5.89 6.15
Oil charge Liter HBR-B04/ 35 HBR-B04/ 39 HBR-B04/ 39 HBR-B04/ 41
Power supply 380V, 3Ph, 50Hz
Compressor
Type Semi-hermetic screw compressor
Quantity 1 1 1 1
Capacity adjusting 25%,50%,75%,100%
Power input kW 62 78 95 122
Rated current A 106 133 162 208
Evaporator
Type Shell-and-tube evaporator
Water flow
volume m3/h 63 80 96 129
Pipe diameter mm DN125 DN125 DN150 DN150
Water pressure
drop kPa 39 39 38 40
Water side
workin
g
MPa 1.0 1.0 1.0 1.0
Condenser
Type Shell-and-tube condenser
Water flow m3/h 73 94 113 150
Pipe diameter mm DN125 DN125 DN150 DN150
Water pressure
drop kPa 51 52 51 55
Water side
working MPa 1.0 1.0 1.0 1.0
Dimension
Length mm 3500 3500 3640 3640
Width mm 1400 1400 1420 1420
Height mm 1680 1750 1970 1970
Shipping weight kg 3000 3120 3420 3930
Running weight kg 3300 3520 3840 4380
Notes:
Nominal cooling capacities are based on following conditions: Chilled water inlet/outlet temperature
12/7℃(53.6F/44.6F); Cooling water inlet/outlet temperature 30/35℃(86F/96F).
The design fouling factor for both evaporator and condenser are 0.086m2/kW (0.0005ft2 F.hr/Btu),
otherwise can be customized.
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
8
Dual head:
Model
Item
LSBLG825
/MCFN
LSBLG925
/MCFN
LSBLG1120
/MCFN
LSBLG1230
/MCFN
LSBLG1500
/MCFN
Cooling Capacity kW 825 924 1120 1230 1500
RT 234.6 262.7 318.5 349.7 426.5
Refrigerant model - R134a
Refrigerant charged kg 360 380 400 420 440
COP(Kw/kw) 5.57 5.92 5.89 5.86 5.95
Oil charge Liter HBR-B04/
39*2
HBR-B04/
39*2
HBR-B04/
39*2
HBR-B04/
39*2
HBR-B04/
41*2
Power supply 380V, 3Ph, 50Hz
Compressor
Type Semi-hermetic screw compressor
Quantity 2 2 2 2 2
Capacity adjusting 25%,50%,75%,100%
Power input kW 148 156 190 210 244
Rated current A 253 266 324 359 417
Evaporator
Type Shell-and-tube evaporator
Water flow volume m3/h 142 159 193 212 258
Pipe diameter mm DN150 DN150 DN200 DN200 DN200
Water pressure
drop kPa 73 77 71 71 73
Water side
working pressure MPa 1.0 1.0 1.0 1.0 1.0
Condenser
Type Shell-and-tube condenser
Water flow m3/h 168 186 226 248 300
Pipe diameter mm DN150 DN150 DN200 DN200 DN200
Water pressure
drop kPa 88 90 85 85 87
Water side working
pressure MPa 1.0 1.0 1.0 1.0 1.0
Dimension
Length mm 4650 4650 4700 4700 4700
Width mm 1500 1500 1600 1600 1620
Height mm 1900 1900 2100 2100 2200
Shipping weight kg 5500 5700 6200 7000 7200
Running weight kg 6000 6210 6710 7680 7900
Notes:
Nominal cooling capacities are based on following conditions: Chilled water inlet/outlet temperature
12/7℃(53.6F/44.6F); Cooling water inlet/outlet temperature 30/35℃(86F/96F).
The design fouling factor for both evaporator and condenser are 0.086m2/kW (0.0005ft2 F.hr/Btu),
otherwise can be customized.
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
9
6. Performance Data
Model
Chilled
water
leaving
temp.℃
Cooling water entering temp. ℃
30 32 35
Cooling
capacity
(kW)
Input(kW)
Cooling
capacity
(kW)
Input(kW)
Cooling
capacity
(kW)
Input(kW)
365
5 341.1 60.0 333.1 61.6 326.1 64.3
6 352.4 61.1 347.3 62.9 337.1 65.2
7 364.0 62.0 359.6 63.6 345.8 66.0
8 377.5 63.1 368.0 64.4 356.7 67.1
9 388.8 63.7 383.3 65.5 372.7 67.8
10 402.9 65.0 394.9 66.5 384.0 68.9
11 424.8 66.3 414.2 67.5 398.2 70.0
12 441.5 67.6 430.6 68.5 413.9 71.0
13 458.6 68.9 447.4 69.5 429.9 72.1
14 476.5 70.1 464.5 70.5 446.6 73.2
15 494.7 71.4 482.7 71.4 464.1 74.2
465
5 435.7 75.4 425.5 77.5 416.6 80.9
6 450.1 76.8 443.6 79.2 430.6 82.1
7 465.0 78.0 459.4 80.0 441.8 83.1
8 482.2 79.3 470.1 81.0 455.7 84.5
9 496.6 80.2 489.6 82.4 476.2 85.3
10 514.8 81.8 504.5 83.6 490.6 86.7
11 542.7 83.4 529.2 84.9 508.7 88.1
12 564.0 85.0 550.1 86.2 528.7 89.3
13 585.9 86.7 571.5 87.4 549.2 90.7
14 608.7 88.2 593.3 88.7 570.6 92.1
15 631.9 89.9 616.6 89.9 592.9 93.3
560
5 524.7 91.9 512.4 94.4 501.8 98.5
6 542.1 93.6 534.2 96.4 518.6 99.9
7 560.0 95.0 553.3 97.4 532.0 101.2
8 580.7 96.6 566.2 98.6 548.8 102.9
9 598.1 97.7 589.7 100.3 573.4 103.9
10 619.9 99.7 607.6 101.8 590.8 105.6
11 653.5 101.6 637.3 103.4 612.6 107.3
12 679.3 103.6 662.5 105.0 636.7 108.8
13 705.6 105.5 688.2 106.5 661.4 110.5
14 733.0 107.4 714.6 108.0 687.1 112.2
15 761.0 109.4 742.6 109.4 714.0 113.6
Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
10
Model
Chilled
water
leaving
temp.℃
Cooling water entering temp. ℃
30 32 35
Cooling
capacity
(kW)
Input(kW)
Cooling
capacity
(kW)
Input(kW)
Cooling
capacity
(kW)
Input(kW)
750
5 702.8 118.0 686.3 121.3 672.0 126.5
6 726.0 120.2 715.5 123.8 694.5 128.3
7 750.0 122.0 741.0 125.1 712.5 129.9
8 777.8 124.1 758.3 126.6 735.0 132.1
9 801.0 125.4 789.8 128.8 768.0 133.5
10 830.3 128.0 813.8 130.8 791.3 135.7
11 875.3 130.4 853.5 132.7 820.5 137.7
12 909.8 133.0 887.3 134.8 852.8 139.7
13 945.0 135.5 921.8 136.8 885.8 141.9
14 981.8 138.0 957.0 138.7 920.3 144.1
15 1019.3 140.5 994.5 140.5 956.3 145.9
825
5 773.0 143.1 754.9 147.1 739.2 153.5
6 798.6 145.8 787.1 150.2 764.0 155.7
7 825.0 148.0 815.1 151.7 783.8 157.6
8 855.5 150.5 834.1 153.6 808.5 160.3
9 881.1 152.1 868.7 156.3 844.8 161.9
10 913.3 155.3 895.1 158.7 870.4 164.6
11 962.8 158.2 938.9 161.0 902.6 167.1
12 1000.7 161.3 976.0 163.5 938.0 169.5
13 1039.5 164.4 1013.9 165.9 974.3 172.1
14 1079.9 167.4 1052.7 168.3 1012.3 174.8
15 1019.3 170.5 994.5 170.5 956.3 177.0
925
5 866.7 150.9 846.4 155.1 828.8 161.8
6 895.4 153.7 882.5 158.3 856.6 164.1
7 925.0 156.0 913.9 159.9 878.8 166.1
8 959.2 158.7 935.2 161.9 906.5 168.9
9 987.9 160.4 974.0 164.7 947.2 170.7
10 1024.0 163.6 1003.6 167.2 975.9 173.5
11 1079.5 166.8 1052.7 169.7 1012.0 176.1
12 1122.0 170.0 1094.3 172.4 1051.7 178.6
13 1165.5 173.3 1136.8 174.9 1092.4 181.4
14 1210.8 176.4 1180.3 177.4 1135.0 184.2
15 1257.1 179.7 1226.6 179.7 1179.4 186.6
Questo manuale è adatto per i seguenti modelli
8
Indice
Altri manuali Midea Refrigeratore
Midea
Midea MGB Series Manuale utente
Midea
Midea LSBLG320/MZ Manuale operativo
Midea
Midea LSBLG MCF Series Manuale operativo
Midea
Midea MCCH30A-TA3SL Manuale operativo
Midea
Midea MGCT-F30W/PN1 Manuale utente
Midea
Midea MWSC340A-FB3 Manuale utente
Midea
Midea MLSC380A-SB3Z Manuale utente
Midea
Midea MC-SU60-RN1L Manuale utente
Midea
Midea MCAC-ATSM-2013-11 Manuale utente
Midea
Midea Aqua Tempo Super II Series Manuale operativo
