Midea LSBLG365/MCFN Operating manual

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
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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
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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
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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
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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
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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
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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
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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
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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
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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

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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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)
1120
5 1049.4 183.7 1024.8 188.9 1003.5 197.0
6 1084.2 187.2 1068.5 192.9 1037.1 199.9
7 1120.0 190.0 1106.6 194.8 1064.0 202.4
8 1161.4 193.2 1132.3 197.2 1097.6 205.8
9 1196.2 195.3 1179.4 200.6 1146.9 207.9
10 1239.8 199.3 1215.2 203.7 1181.6 211.3
11 1307.0 203.1 1274.6 206.7 1225.3 214.5
12 1358.6 207.1 1325.0 210.0 1273.4 217.6
13 1411.2 211.1 1376.5 213.0 1322.7 221.0
14 1466.1 214.9 1429.1 216.0 1374.2 224.4
15 1522.1 218.9 1485.1 218.9 1428.0 227.2
1230
5 1152.5 203.1 1125.5 208.7 1102.1 217.8
6 1190.6 206.9 1173.4 213.2 1139.0 220.9
7 1230.0 210.0 1215.2 215.3 1168.5 223.7
8 1275.5 213.6 1243.5 218.0 1205.4 227.4
9 1313.6 215.9 1295.2 221.8 1259.5 229.7
10 1361.6 220.3 1334.6 225.1 1297.7 233.5
11 1435.4 224.5 1399.7 228.5 1345.6 237.1
12 1492.0 228.9 1455.1 232.1 1398.5 240.5
13 1549.8 233.3 1511.7 235.4 1452.6 244.2
14 1610.1 237.5 1569.5 238.8 1509.2 248.0
15 1671.6 241.9 1631.0 241.9 1568.3 251.2
1500
5 1405.5 235.9 1372.5 242.5 1344.0 253.0
6 1452.0 240.3 1431.0 247.7 1389.0 256.7
7 1500.0 244.0 1482.0 250.1 1425.0 259.9
8 1555.5 248.1 1516.5 253.3 1470.0 264.3
9 1602.0 250.8 1579.5 257.7 1536.0 266.9
10 1660.5 256.0 1627.5 261.6 1582.5 271.3
11 1750.5 260.8 1707.0 265.5 1641.0 275.5
12 1819.5 266.0 1774.5 269.6 1705.5 279.4
13 1890.0 271.1 1843.5 273.5 1771.5 283.8
14 1963.5 276.0 1914.0 277.4 1840.5 288.2
15 2038.5 281.1 1989.0 281.1 1912.5 291.8

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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7. System Schematic Diagram
For single head unit (LSBLG365~750/MCFN)
For dual head unit (LSBLG820~1500/MCFN)

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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8. Outline Dimension
Single head:
Model A B C D E F G H J
Cooling
water
Inlet/outlet
Chilled
water
Inlet/outlet
365/MCFN 3500 1400 1750 2850 1300 380 640 350 610 DN125 DN125
465/MCFN 3500 1400 1800 2850 1300 380 640 350 610 DN125 DN125
560/MCFN 3600 1500 2000 2855 1320 500 780 380 640 DN150 DN150
750/MCFN 3600 1500 2000 2855 1320 500 780 380 640 DN150 DN150
Dual heads:
Model A B C D E F G H J
Cooling
water
Inlet/outlet
Chilled
water
Inlet/outlet
825/MCFN 4500 1600 1900 3855 1400 470 730 430 730 DN150 DN150
925/MCFN 4500 1600 1900 3855 1400 470 730 430 730 DN150 DN150
1120/MCFN 4600 1700 2100 3855 1500 440 740 390 690 DN200 DN200
1230/MCFN 4600 1700 2100 3855 1500 440 740 390 690 DN200 DN200
1500/MCFN 4600 1700 2100 3860 1520 460 800 410 750 DN200 DN200

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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9. Water Flow
Balance the chilled water flow through the evaporator and the condenser water flow through the
condenser. The flow rates must fall between the minimum and maximum values shown in the below
table. Flow rates below the minimum values shown will result in laminar flow which will reduce efficiency,
cause erratic operation of the electronic expansion valve and could cause low temperature cutouts. On
the other hand, flow rates exceeding the maximum values shown can cause erosion on the heat
exchanges water connections and tubes, even piping breaking.
Variable chilled water flow through the heat exchanges while the compressor(s) are operating is not
recommended. The chiller control set points are based upon a constant flow and variable temperature.
Unit Model
CHILLED WATER CONDENSER WATER
MIN. FLOW
RATE
MAX. FLOW
RATE
MIN. FLOW
RATE
MAX. FLOW
RATE
SIZE m3/h GPM m3/h GPM m3/h GPM m3/h GPM
LSBLG365/MCFN 44 194 82 360 51 225 95 418
LSBLG465/MCFN 56 246 104 458 66 290 122 538
LSBLG560/MCFN 67 296 125 549 79 348 147 646
LSBLG750/MCFN 90 397 168 738 105 462 195 858
LSBLG825/MCFN 99 437 185 812 118 517 218 961
LSBLG925/MCFN 111 490 207 909 130 573 242 1064
LSBLG1120/MCFN 135 594 251 1104 158 696 294 1293
LSBLG1230/MCFN 148 653 276 1213 174 764 322 1419
LSBLG1500/MCFN 181 795 335 1476 210 924 390 1716

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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II. Installation
Safety considerations
Access to the unit must be reserved to authorized personnel, qualified and trained in monitoring and
maintenance. The access limitation device must be installed by the customer.
After the unit has been received, when it is ready to be installed or reinstalled, and before it is started
up, it must be inspected for damage. Check that the refrigerant circuit(s) is (are) intact, especially that no
components or pipes have shifted. If in doubt, carry out a leak tightness check and verify with the
manufacturer that the circuit integrity has not been impaired. If damage is detected upon receipt,
immediately file a claim with the shipping company.
Strongly recommend employing a specialized company to unload the machine.
Safety is only guaranteed, if these instructions are carefully followed. If this is not the case, there is a
risk of material deterioration and injuries to personnel.
1. Unit Lifting
1) When transporting the unit, please make sure there is no any collision happens between the
unit and other objects.
2) Move the unit by placing a roller in the bottom of the unit to avoid damage.
3) Choose a suitable crane according to the unit’s weight（Buy an insurance for it if it is
convenient）；Hoist the unit according to the following chart strictly. The steel rope shall wind the
lifting hook one circle to prevent steel rope slipping and causing danger when the weight is
unbalanced. Security guard circle should be set up when hoist the unit, and also abide by the
local Safety Regulations when hoist the unit. Prohibit non-staff entering the job site or staying
under the unit or the hoisting crane.
2. Installation Location Select
1) Leave enough space above and around unit for operation and maintenance. For cleaning the

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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copper pipes or exchanging pipes, there should be enough space reserved( for single
compressor unit, it should be at least 3.5m, for dual compressor unit, it should be 5m), and the
other end of the unit should have at least 2.0m space, use the hole on door or other holes with
appropriate position; there should have the space of 0.7m in front of the unit (the side faces to
the electric cabinet ) for operation; the space in front and back of the unit should not less than
0.6m .
2) Do not install the unit at the place exposed to sunlight or other heat sources.
3) Near the power supply where it is convenient for wiring.
4) The floor is solid enough and the location should not easily bring about resonance or noise.
5) Put the unit indoors which should be well-ventilated with low humidity and little dust.
Height
Length
Width
Recommended
clearance D
Maintenance
clearance F
Recommended
clearance E
Recommended
clearance G
Recommended
clearance H
Front of the chiller
Model
Dimensions
LSBLG/MCFN R134a, FLOODED TYPE
Single head Dual heads
365 465 560 750 825 925 1120 1230 1500
D(mm) 600 600 600 600 600 600 600 600 600
E(mm) 600 600 600 600 600 600 600 600 600
F(mm) 2000 2000 2000 2000 5000 5000 5000 5000 5000
G(mm) 700 700 700 700 700 700 700 700 700
H(mm) 3500 3500 3500 3500 2000 2000 2000 2000 2000
3. Installation Foundation
1) Please take into account the construction of installation foundation. Attention should be
especially paid to the intensity of the floor and noise elimination when installing the unit in
interlayer or on the top floor. It is suggested to consult the building designer before installation.
2) For convenient drainage, gutter way should be made around the basement to ensure the
drainage unblocked.
3) To eliminate the vibration and noise, put an absorber between the unit and basement and keep

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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the unit in balance. Install a shockproof foundation when necessary.
4) Vibration isolators are recommended for all roof mounted installations or wherever vibration
transmission is a consideration. Neoprene Isolation is optional, it is recommended for normal
installations and provides good performance in most applications for the least cost. Spring
isolator is level adjustable, spring and cage type isolators for mounting under the unit base rails.
1” nominal deflection may vary slightly by application.
Typical Isolation:
Foundation Dimensions
D
E+500
E
Evap Centre Line
Cond Centre Line
A
A
A-A
Rubber Pad
(δ15) 200X200
C h iller Le g
Steel Base Plate ( δ10) 200X150
Provided by user
Anchor Bolt M20X400
Provided by user
N ut M 20
Provided by user
Gasket 200
Provided by user
100
300
45°
150X150
400
Grout concrete
after chiller in pla c e
D+500
F
B
RL
Front side of chiller
A
B
Drain ditch
Foundation Bolt Installation Dimension Table
Model
Dimension
LSBLG**/MCF Flooded Screw Water Cooled Chiller
365 465 560 750 825 925 1120 1230 1500
A(mm) 3490 3490 3490 3490 4490 4490 4490 4490 4490
B(mm) 1950 1950 2050 2050 1950 1950 2100 2100 2100
D(mm) 2790 2790 2790 2790 3790 3790 3790 3790 3790
E(mm) 1250 1250 1350 1350 1250 1250 1400 1400 1400
Anchor Bolt
Chiller Leg
Rubbe
r
Pad
Steel Base Plate
Concrete Base

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
18
4. Vibration Isolators
Put the absorbers under unit saddles before final positioned the unit. The quantity of absorber used
for each unit is always decided by the elasticity or durometer value of the absorber. Below please
refer to the typical isolation pad and vibration isolator for selection.
Typical isolation pad Typical vibration Isolator
≥
Expected load bearing value listed below:
Model
Isolation pad Vibration Isolator
Running
Weight (kg)
Minimum load
bearing (kg/EA)
Minimum
Quantity
Minimum load
bearing (kg/EA) Quantity
LSBLG 365/MCFN 900 4 900 4 3300
LSBLG 465/MCFN 1000 4 1000 4 3600
LSBLG 560/MCFN 1200 4 1200 4 4200
LSBLG 750/MCFN 1400 4 1400 4 4500
LSBLG 825/MCFN 1800 4 1800 4 6000
LSBLG 925/MCFN 1800 4 1800 4 6500
LSBLG 1120/MCFN 2000 4 2000 4 7300
LSBLG1230/MCFN 2200 4 2200 4 7600
LSBLG 1500/MCFN 2200 4 2200 4 8000
Note:
(1) Pads have to extend the full length of the saddle when isolation pad be used.
(2) Level the unit to within 5mm over through it’s length and width after absorbers installed.

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
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5. Installation of Water Pipeline System
Due to the variety of piping practices, it is advisable to follow the recommendations of local
authorities. The installation and insulation of the water pipelines of the air conditioning system shall
be designed and guided by design professionals, and confirm to the corresponding provisions of the
HVAC installation specifications.
Basically, the piping should be designed with a minimum number of bends and changes in elevation
to keep system cost down and performance up.
1) The water inlet pipeline and drain pipeline shall be connected according to the requirements of
markings on the unit. Generally, the refrigerant pipe side of the evaporator is the chilled water
outlet side.
2) The chilled water pipeline system must be provided with the soft connection, thermometer,
pressure gauge, water filter, electronic scale remover, check valve, target flow controller,
discharge valve, drain valve, stop valve, expansion tank, etc.
3) The water system must be fitted with the water pump with appropriate displacement and head,
so as to ensure normal water supply to the unit. The soft connection shall be used between the
water pump, unit and water system pipelines, and the bracket shall be provided to avoid stress
on the unit. Welding work for installation shall avoid damage to the unit.
(1) Determination of water pump flow:
Flow (m3/h) = (1.1 ~ 1.2) * Unit Cooling Capacity (kW)/5.8
(2) Determination of water pump head:
Head (m) = (Unit Resistance (see product parameters) + Resistance at Maximum End of

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
20
Pressure Drop (see product parameters) + Pipeline Resistance (length of the least favorable
loop pipe * 0.05) + Local Resistance (length of the least favorable loop pipe * 0.05 * 0.5)) * (1.1
~ 1.2)
4) The flow switch must be arranged on the drain pipe of the evaporator. The flow switch shall be
interlocked with the input contact in the control cabinet. Its installation requirements are as
follows:
(1) The flow switch shall be installed on the pipe vertically.
(2) The straight pipe section at each side of the flow switch shall have a length that is at least 5
times the pipe diameter; do not install it near the elbow, orifice plate or valve.
(3) The direction of the arrow on the flow switch must be consistent with the direction of water
flow.
(4) In order to prevent vibration of the flow switch, remove all air in the water system.
(5) Adjust the flow switch to keep it in open state when the flow is lower than the minimum flow
(the minimum flow is 70% of the design flow). When the water flow is satisfied, the flow
switch shall keep in closed state.
5) The water filter must be installed before the water inlet pipeline of the unit, which shall be
provided with a 25-mesh screen. This will aid in preventing foreign material from entering and
decreasing the performance of the evaporator.
6) A strainer should be placed for enough upstream to prevent cavitation at the pump inlet (consult
pump manufacturer for recommendations). The use of a strainer will prolong pump life and help
maintain high system performance levels
7) The flushing and insulation of the water pipelines shall be carried out before it is connected with
the unit, so as to prevent dirt from damaging the unit.
8) The design water pressure of the water chamber is 1.0Mpa. Use of the water chamber shall be
not exceeding this pressure in order to avoid damaging the evaporator.
9) Do not load the weight of water pipe onto the unit. When water inlet/outlet are connected with
corresponding water pipe, soft connection such as rubber joint should be used to avoid the
transmission and inter-disturbance of vibration and noise to avoid the vibration which may be
transmitted to indoor side.