Midea LSBLG MCF Series Technical & Service Manual Download Page 11

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Flooded type water cooled screw chiller (MIC)

MCAC-CTSM-2018-1



The flooded evaporator makes cleaning the inside of pipes possible, and guarantees high reliability.



The discharge cut-off valve and liquid line angle valve simplify maintenance.

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Simplified field wiring for easy installation.

Optimized, user-friendly operating Interface



Midea chiller adopts Midea Microprocessor which

provides advanced algorithms and reliable control.



Graphical display of the operating state, operation

scheduling, malfunction inquiry, help menu for easy

trouble shooting and other user-oriented functions.

Compressor bearing

High-precision large-sized axial and radial bearings

are selected to support the male and female rotors for a long service life. With an effective

lubrication system, the bearing service life can be further extended. While the compressor is running,

lubricant is injected into all bearings due to the pressure difference.

SKF brand industry use bearing guarantees 60,000 hours of continuous working

Advanced twin-rotor screw compressor

Midea® Screw Chiller is equipped with the 3rd generation industrial Semi-hermetic Screw

compressor, which has the latest advanced 5-6 asymmetry dentiform rotors. The rotors are

processed by high-precision CNC and each part is well-proportioned and non-gap matched, which

minimizes friction and clearance loss, guaranteeing quiet running and long duration.

Summary of Contents for LSBLG MCF Series

Page 1: ... Building 6 Midea Avenue Beijiao Shunde Foshan Guangdong China Postal code 528311 Tel 86 757 26338346 Fax 86 757 22390205 cac midea com global midea com Note The data in this book may be changed without notice for further improvement on quality and performance LSBLG MCF Flooded Type Model TechnicalServiceManual Water Cooled Screw Chiller ...

Page 2: ... Refrigeration system 17 6 Major system components 18 7 Water flow 22 8 Operating range 25 9 Accessories 26 III Control 27 1 Control flow chart 27 2 Energy adjustment 28 3 Start stop process 29 4 Sensors 30 5 Parts control 31 6 Operation part 39 7 Safety protection 52 IV Electrical control 54 1 Electrical data 54 2 Electrical components 55 3 Electrical parts parameter setting 56 4 Field wiring 58 ...

Page 3: ...02 IX Appendix 105 1 Temperature Resistance specifications sheet for the discharge temperature sensor 105 2 Temperature Resistance specifications sheet for the water temperature sensor ambient temperature sensor oil temperature sensor 106 3 Temperature Resistance specifications sheet for the EXV temp sensor 107 4 Sample selection sheet 109 The manufacture reserves the right to discontinue or chang...

Page 4: ...hat the valves are correctly installed before operating the unit 4 The relief valves are designed and installed to ensure protection against overpressure caused by fire The relief valve must only be removed if the fire risk is fully controlled and after checking that doing so is allowed by local regulations and authorities This is the responsibility of the operator If the unit is installed in a ro...

Page 5: ...ng work ATTENTION Even if the unit has been switched off the power circuit remains energized unless the unit or circuit disconnect switch is open Refer to the wiring diagram for further details Attach appropriate safety labels 2 2 Operating checks Important information regarding the refrigerant used Refrigerant type R134a Periodic inspections for refrigerant leaks may be required depending on loca...

Page 6: ...ygen to purge lines or to pressurize a machine for any reason Oxygen gas reacts violently with oil grease and other common substances Never exceed the specified maximum operating pressures Verify the allowable maximum high and low side test pressures by checking the instructions in this manual and the pressures given on the unit name plate Do not use air for leak testing Use only refrigerant or dr...

Page 7: ...ay rack or support Periodically check and repair or if necessary replace any component or piping that shows signs of damage The refrigerant lines can break under weight and release refrigerant causing injury Do not climb on a machine Use a platform or staging to work at higher levels Use mechanical lifting equipment crane hoist winch etc to lift or move heavy components For lighter components use ...

Page 8: ...50Hz 540 1 LSBLG720 MCF 380V 3Ph 50Hz 720 1 LSBLG805 MCF 380V 3Ph 50Hz 805 1 LSBLG890 MCF 380V 3Ph 50Hz 890 1 LSBLG1055 MCF 380V 3Ph 50Hz 1055 1 Dual compressors LSBLG1200 MCF 380V 3Ph 50Hz 1200 2 LSBLG1300 MCF 380V 3Ph 50Hz 1300 2 LSBLG1410 MCF 380V 3Ph 50Hz 1410 2 LSBLG1620 MCF 380V 3Ph 50Hz 1620 2 LSBLG1780 MCF 380V 3Ph 50Hz 1780 2 LS BLG M C F 340 LS Water cooled chiller BLG Semi hermetic scre...

Page 9: ...Flooded type water cooled screw chiller MIC MCAC CTSM 2018 1 8 3 External appearance Single head LSBLG340 MCF LSBLG1055 MCF Dual heads LSBLG1200 MCF LSBLG1780 MCF ...

Page 10: ... High efficiency heat exchange technology High efficiency shell and tube heat exchanger 2 pass straight water pipe easy to clean The end covers can be exchanged to meet customers requirements for condenser Capacity adjustable valve Built in oil separator Motor direct drive Four stage capacity adjustable or stepless adjustable Exhaust cavity with check valve it can avoid compressor to reversal caus...

Page 11: ...r bearing High precision large sized axial and radial bearings are selected to support the male and female rotors for a long service life With an effective lubrication system the bearing service life can be further extended While the compressor is running lubricant is injected into all bearings due to the pressure difference SKF brand industry use bearing guarantees 60 000 hours of continuous work...

Page 12: ...pass stator optimizes heat dissipation and does not require computer room AC To reach high operation efficiency the casing is manufactured by precise machining centers and inspected by a coordinating measuring machine to ensure the requested precision and quality can be retained in the compressor Three stages oil separation The built in oil separator utilizes three stage filter mechanism with high...

Page 13: ...r Midea condenser has a specially designed baffle in the condenser s entrance to prevent high velocity refrigerant gas hitting the tube surface eliminating the related vibration and noise It has been tested under extreme conditions Water side working pressure is designed for 1 0 Mpa Higher pressure vessels can be customized Throttling device The orifice baffle has no moving parts guaranting high r...

Page 14: ... separated in the internal oil separator for the first time and then is sent to the condenser oil separator where separating efficiency can reach 99 Oil returns to the compressor through the oil return pipe due to the pressure difference A small amount of oil which remains in the evaporator will be sucked up by the Venturi tube and returns to the compressor after the gas evaporates This is the thi...

Page 15: ...96 3521 3521 3521 3588 Unit width mm 1200 1200 1200 1400 1400 1400 1500 Unit height mm 1716 1768 1848 1928 2026 2026 2250 Packing length mm 3950 3950 3950 3950 3950 3950 3950 Packing width mm 1340 1340 1340 1560 1560 1560 1660 Packing height mm 1950 2020 2120 2220 2240 2240 2470 Running weight kg 2515 2560 2935 3800 4210 4300 5470 Shipping weight kg 2525 2540 2875 3580 3980 4060 5210 Safety protec...

Page 16: ... width mm 1500 1500 1500 1600 1600 Unit height mm 2191 2241 2241 2343 2343 Packing length mm 5050 5050 5050 5050 5050 Packing width mm 2080 2080 2080 2180 2180 Packing height mm 2411 2461 2461 2563 2563 Running weight kg 6482 6582 6680 8250 8400 Shipping weight kg 6262 6362 6410 7730 7850 Safety protection device The following safety devices are equipped as standard High pressure protection High p...

Page 17: ... ＣＤＥＦＧＨ J K L Water inlet outlet LSBLG1200 MCF 4593 1500 2191 3850 1400 443 350 375 750 350 618 DN200 LSBLG1300 MCF 4593 1500 2241 3850 1400 443 350 375 750 350 618 DN200 LSBLG1410 MCF 4593 1500 2241 3850 1400 443 350 375 750 350 618 DN200 LSBLG1620 MCF 4611 1600 2343 3850 1500 468 350 400 800 350 643 DN200 LSBLG1780 MCF 4611 1600 2343 3850 1500 468 350 400 800 350 643 DN200 NOTE Drawings are...

Page 18: ...MCAC CTSM 2018 1 Flooded type water cooled screw chiller MIC 17 5 Refrigeration system For single compressor LSBLG340 1055 MCF For dual compressors LSBLG1200 1780 MCF ...

Page 19: ...ariable control down to 25 of their total capacity This control is made by capacity slides controlled by microprocessors Standard starter is star delta type Infinite capacity control type is available as an option With 5 6 asymmetry dentiform the screw rotor patent is based on improving the shape of German rotor GHH It is proven to have good balance low vibration and low noise after balance testin...

Page 20: ...4a unit The Oil Separator has reliable qualification The oil content can be controlled to below 3ppm the oil content treated by oil gas separator of common like screw type air compressor is least 8 10ppm The oil gas separator amount is double that of same kind of other products The large oil filter area reduces refrigerant flux speed and has a better separating affect and longer lifespan than the ...

Page 21: ...the user or operator must be included in the supervision and maintenance file 6 2 2 Repair Any repairs or modification including the replacement of moving parts Must follow local regulations and be performed by qualified operators in accordance with authorized procedures including changing the heat exchanger tubes Must be made in accordance with the instructions of the original manufacturer Repair...

Page 22: ...water in tubes Replaceable water tubes are fabricated from integral finned cooper and mechanically bonded to steel tube sheets The condenser is GB T151 2014 Chinese Standard designed constructed inspected and stamped Water side working pressure is designed for 1 0 Mpa The condenser adopts high efficient tubes to enhance transfer performance The system s COP can be greatly increased by adding the s...

Page 23: ...rating is not recommended The chiller control set points are based upon a constant flow and variable temperature Model Evaporator water flow rate m3 h Condenser water flow rate m3 h Rated Minimum Maximum Rated Minimum Maximum LSBLG340 MCF 58 29 64 73 37 80 LSBLG440 MCF 76 38 83 95 47 104 LSBLG540 MCF 93 46 102 116 58 128 LSBLG720 MCF 124 62 138 155 74 173 LSBLG805 MCF 138 69 152 173 87 190 LSBLG89...

Page 24: ... MCF LSBLG1780 MCF 0 10 20 30 40 50 60 70 0 0 50 0 100 0 150 0 200 0 250 0 300 0 Water pressure drop KPa Water flow m3 h Water pressure drop curve condenser LSBLG340 MCF LSBLG440 MCF LSBLG540 MCF LSBLG720 MCF LSBLG805 MCF LSBLG890 MCF LSBLG1055 MCF 0 20 40 60 80 100 120 140 0 0 100 0 200 0 300 0 400 0 500 0 Wayer pressure drop KPa Water flow m3 h Water pressure drop curve condenser LSBLG1200 MCF L...

Page 25: ...ne system W QgT CP t W Minimum water volume kg Qg Total cooling heating capacity of the terminal kW T Thermal stability time requirement Take 8 10 60s CP Water specific heat at constant pressure 4 187kj kg t Water temperature fluctuation required value take 5 For system Qg is calculated according to the lowest load so that it operates stably It can be also calculated according to 0 5Q 50 T takes 8...

Page 26: ...port temperature 25 50 Applicable altitude range Less than 1000m LSBLG MCF evaporator Minimum Maximum Entering temperature at start up 8 C 25 C Leaving temperature during operation 5 C 15 C Entering leaving temperature difference at full load 3 8 C 8 C LSBLG MCF condenser Minimum Maximum Entering temperature at start up 19 C 35 C Leaving temperature during operation 22 C 42 C Entering leaving temp...

Page 27: ...bration damper SHA 2600 340 440 540kW To avoid vibration and noise use between base and foundation when installing the unit 4 SHA 3200 720 1780kW 3 Remote control cabinet GX03501 Can be installed in the control room Through the cable connected to the unit touch screen it can display all states information and complete all the operations of unit startup shutdown error confirm etc 1 4 Flange Q235 B ...

Page 28: ... to input signal from HMI such as starting signal controller performs the logical operations and outputs signals These signals act on components time relay contactors and so on Phase Sequence Protector Miniature Circuit Breaker M Compressor Thermo relay Compressor Contactor Star Delta Start HMI Terminal for External Signal e g Temp Pressure Terminal for Output Action e g Solenoid Valve Main base c...

Page 29: ... MCAC CTSM 2018 1 28 2 Energy adjustment The unit adjusts capacity by chilled water The control logic references picture Energy adjustment is districted when starting high pressure is too high High pressure 19Bar 18Bar unloading Normal adjusting ...

Page 30: ...ar failure YES Start on Chilled pump on Cooling pump on Cooling tower on Water flow switvh Water temp is OK Oil heating time is enough Stop time is enough Compressor 25 SV ON Compressor Y start Compressor 75 SV on 50 SV off Energy adjust Stand NO NO YES Stop clear failure YES Stand NO Unload Loading Water temp is OK Stop ...

Page 31: ...e discharge temperature EXV discharge temperature NO Name Type Remark 1 Chilled entering water temp NTC 10k 25 Emerson 2 Chilled leaving water temp NTC 10k 25 Emerson 3 Cooling entering water temp NTC 10k 25 Emerson 4 Cooling leaving water temp NTC 10k 25 Emerson 5 Discharge temp 50k 25 6 EXV discharge temp NTC 50k 25 CAREL 7 Pipe temp Emerson Thermistors For PTC thermistors resistances vary with ...

Page 32: ...nected to S1 and S2 terminal The thermistors are not serviceable in the field If the compressor motor thermistor fails replace the compressor 2 pressure sensors The pressure sensors are pressure transmitters Danfoss AKS3000 are used Water temp thermistor suction temp thermistor pressure transmitter AKS3000 5 Parts control 1 Oil heater control If the unit is in standby modes and the oil heater is e...

Page 33: ...let temperature 20 C real time value oil heating time for first startup is 8hrs If power down happens when the unit is running and downtime is less than 1hrs no heating time delay is needed when unit restarts If it exceeds 1hrs 3h heating time is need If it exceeds 5hrs 5hrs heating time is needed If it exceeds 8hrs 8hrs heating time is needed 2 Pressure sensor Control High pressure control 3 Disc...

Page 34: ...r It detects discharge pressure and temperature and calculates discharge superheat Then it controls EXV opening depending on the superheat If it is incorrect EXV will output alarm signal to main base controller b Controller display The interface of EXV controller cannot display and set the parameter on unit It can only display running status If the parameters need to be displayed and set change th...

Page 35: ...he display shows the interface Esc To exit the programming maintenance producer and display mode set a parameter then exit without saving changes UP DOWN Display screen navigation Increase decrease the value Enter from the parameter setting mode the display switches to Confirm the list of parameters and return the value 1 Display suction superheat 2 Display EXV opening 3 Relay output status 4 Alar...

Page 36: ...and confirm with ENTER If the password is correct the first parameter that can be modified Network address Press UP DOWN to select parameters to set up Press ENTER to move to the parameter value Press UP DOWN to modify the parameter value Press ENTER to save the new parameter values Repeat the above 5 6 7 8 step change other parameters Press Esc to exit the repair parameters modify the program The...

Page 37: ...r conditioner Drive hardware configuration 4 13 Type of probe S1 NTC Carel Auxiliary control type Disabled Drive hardware configuration 5 13 Type of probe S3 Unused Relay configuration Generate alarms Drive hardware configuration 6 13 Type of probe S4 Unused DI1 configuration Start stop SH control Drive hardware configuration 7 13 Language Chinese DI2 configuration Disabled Control parameter setti...

Page 38: ...delay 6 Valve opening in standby state 0 Power supply mode 1 Available values include 1 0 24 V AC 2 1 24 V DC default value 0 Check parameters Enable manual valve positioning 0 Manually set the valve position 0 Auxiliary control Invalid Relay settings Alarm relay DI2 settings Invalid Variable 1 on the display Overheat degree Variable 2 on the display Valve opened Sensor S1 alarm management Valve a...

Page 39: ...rotection threshold 50 LOP protection integration time 4 MOP protection threshold 50 MOP protection integration time 10 Low overheat degree alarm delay Low SH 0 no alarm 300 Low evaporation temperature alarm delay LOP 0 no alarm 300 High evaporation temperature alarm delay MOP 0 no alarm 600 Low air suction temperature alarm threshold 50 Low air suction temperature alarm delay 0 no alarm 300 ...

Page 40: ...te window Use the administrator password 40828 to enter the purple window Welcome page Mode selection Status information Timer on off Time setting Touch screen setting Alarm record history Alarm record history inquiry Condition display of unit start Temperature and pressure display Input status Output status User parameter setting Parameter setting input password Alarm information Main page ...

Page 41: ...ndicator is the power indicator It stays on under normal conditions if it is not check the power supply wiring Green indicator is the touch screen operation indicator It normally flashes slowly Red indicator is the communication indicator It normally flashes quickly If it is not check if the communication wire connected with the main control board is connected properly and tightly Main page Figure...

Page 42: ...are not satisfied The compressor startup condition includes 1 Water temperature does not satisfy compressor startup conditions 2 Water temperature needs to be higher than compressor startup temperature in cooling mode Water temperature needs to be lower than compressor startup temperature in heating mode this temperature can be modified in the parameter settings page 3 Oil temperature of compresso...

Page 43: ...urrent status of machine is standby it cannot start in fault status Please confirm if the oil heating is completed If not machine may stay in a pause state for a long time and compressor cannot start Press start button at bottom left of screen pop up window will appear If startup is confirmed press confirm if not click X at the top right corner of the window to cancel startup Figure 6 4 If the sta...

Page 44: ...up of the unit is finished Pause state Control water temperature will be lower than water temperature in paused state The unit enters pause state and compressor stops operating Control water temperature will be higher than water temperature of compressor when it starts The compressor will start and enter operating state Shutting down the unit enters shutting down state when carry out operation of ...

Page 45: ...ng time of compressor and water pump Display times that compressor starts You can check which state the unit operates in 25 50 75 100 Display whether the unit has a set limit for maximum load Display whether the unit gives an alarm and which unit head gives the alarm exactly Display whether the compressor oil heating is finished If compressor starts It needs to be satisfied that oil heating time i...

Page 46: ...ressor Start needs to be YES if it is NO the current water temperature does not meet the startup conditions of compressor Oil Temp Allow Compressor Start needs to be YES if it is NO the current oil temperature does not meet the startup conditions of compressor Shutdown must meet the following conditions Min Running Time Elapsed needs to be YES NO indicates the delay time for shutdown is not reache...

Page 47: ...essor operates and contactor has action 3 Status information output status Output status page ON means the output point is powered on OFF means the input point is powered off When the unit is in shutdown state all state displays are OFF According to the startup shutdown command the relative switch action is activated Figure 6 9 Remark subject to the actual principle diagrams User parameter setting...

Page 48: ...User parameter setting temperature setting Input the password 40828 and enter the page as figure 6 12 shows below Figure 6 12 MAX at the top left of setting window is upper limit of parameter setting and MIN is lower limit of parameter setting out of range is not accepted Press Enter button to confirm input Press CLR button to cancel input The keyboard for number input will disappear Noun explanat...

Page 49: ...tup temperature the compressor can start in heating mode when control water temperature is lower than startup temperature the compressor can start Limit of load the maximum load of unit can be set 0 without limit of maximum load 1 maximum load is up to 75 2 maximum load is up to 50 Timer setting of startup or shutdown It will only display when control mode is timer 1 User parameter setting mode se...

Page 50: ...unit will start or shutdown according to the timer setting If the unit needs to continue running for a period of time for example staringt from Tuesday 10 00 and shutdown at 16 00 Thursday user can set as 10 00 and switch the button from Invalid to Valid in the timer starting setting of Tuesday then set as 16 00 and switch the button from Invalid to Valid in the timer shutdown setting for Thursday...

Page 51: ...as not been eliminated green means the fault has been eliminated Note High pressure protection does not resume automatically so the user needs to find reset the switch manually Over load protection does not resume automatically so the user needs to find the thermal relay in the control cabinet and reset it manually 1 Alarm history Press the Detailed and enter record page to record the alarms when ...

Page 52: ...MCAC CTSM 2018 1 Flooded type water cooled screw chiller MIC 51 Figure 6 17 Please refer to the actual operation interface It is subject to change without notice ...

Page 53: ...t the module will cut off control circuit immediately The module with phase sequence control can prevent motor reversal due to the adverse consequences When any one phase lost the module will cut off main power after a short delay to protect the motor from burning When phase imbalance happens the power cuts immediately To avoid interference and discriminate between false voltage drop and malfuncti...

Page 54: ...ved and cleared on the fault record page of touch screen Sometimes if the malfunction cannot be solved by resetting consider replacing the pressure switches Evaporator protection Low Chilled Leaving Water Temperature PCB is programmed to shut the chiller down if the leaving water temperature drops below 4 C When water temperature rises to 10 the safety resets and the chiller restarts The chillers ...

Page 55: ...990 1880 2260 2260 Max allowed current A 227 281 281 332 367 Rated current A 178 198 215 257 266 Rated power kW 103 116 125 146 153 Crankcase heater Voltage V 220 220 220 220 220 220 220 220 220 220 220 220 Total input kW 0 3 0 3 0 3 0 3 0 3 0 3 0 3 0 6 0 6 0 6 0 6 0 6 Total Amps A 1 36 1 36 1 36 1 36 1 36 1 36 1 36 2 72 2 72 2 72 2 72 2 72 Note 1 Customer to specify the exact nominal power supply...

Page 56: ...e the contactor coil The coil power supply can be DC or AC Our standard screw compressor model uses the AC220V coil 3 Compressor thermal overload relay The thermal overload relay works are based on heating effect of electric current With inverse time limit action feature which is similar to the permissible overload feature of the motor it provides overcurrent protection for the compressor and fan ...

Page 57: ...valve When the solenoid valve is powered off the spring pushes the closed component to the valve seat once the electromagnetic force disappears and the valve is closed Voltage of the solenoid valve washer is AC220V and it is driven directly by the main control board output 3 Electrical parts parameter setting 1 Power protector Power protector use Schneider RM17TU type Select the voltage class For ...

Page 58: ...er than the calculated one For example in the preceding calculation the calculated value is 4 17 in practice set the value to 4 15 Unit Type Maximum Running Current of Compressor Transformation Ratio of Current Transformer Thermal Relay Value of Compressor 340 141 4 200 5 3 5 440 169 4 250 5 3 3 540 206 1 300 5 3 4 720 241 2 400 5 3 5 805 331 7 500 5 3 3 890 366 8 600 5 3 0 1055 203 0x2 300 5 3 3 ...

Page 59: ...Flooded type water cooled screw chiller MIC MCAC CTSM 2018 1 58 4 Field wiring 1 Wiring diagram Power supply wiring diagram ...

Page 60: ...0 MCF 4 AWG3 0 AWG1 LSBLG1300 MCF 4 AWG500 AWG300 LSBLG720 MCF 4 AWG4 0 AWG1 0 LSBLG1410 MCF 4 AWG600 AWG300 LSBLG805 MCF 4 AWG300 AWG4 0 LSBLG1620 MCF 4 2 AWG300 AWG300 LSBLG890 MCF 4 AWG400 AWG4 0 LSBLG1780 MCF 4 2 AWG400 AWG500 Notice The given wire length limits voltage drop to 2 If the length cannot be reduced the power cord should be bolder If the cable is installed in pipe or the ambient te...

Page 61: ...ller has reserved a RS485 interface using the MODBUS protocol 1 PLC units PC connection PC connection wiring Notes for PLC unit PC communication Bit rate 19200 Transmission bit 8 Stop bits 1 Parity check even 2 MIC units PC connection PC connection wiring Notes for MIC unit PC communication Bit rate 9600 Transmission bit 8 Stop bits 1 Parity check no Only double head Inside electric control cabine...

Page 62: ...S1 S2 M1 M2 L1 L2 L3 12 11 14 KR L1 L2 L3 N TA1 TA2 FR KM1 KM3 KM2 U V W Y X Z QF1 QF2 KM1 SB UR1 L11 L15 103 2 F2 2 F2 2 B7 X 26 X 25 L15 N 202 216 X 24 X 23 N 1 C12 1 F12 EH EV 1 3 5 ST1 ST2 2 B7 202 222 2 B9 2 B9 KA FR KM3 KM1 KM1 KT KM2 KM3 KT 105 115 107 109 117 KM3 KT KM2 KM2 111 113 L15 1 G2 1 G2 RS485 Communication Line 3 F2 1SF 101 3 E12 3 B10 ...

Page 63: ...he dotted box X 31 X 33 X 35 X 5 X 4 X 32 X 34 X 6 X 3 309 311 313 315 307 YV3 YV2 YV1 SB1 SB2 X 13 X 12 X 15 206 208 SL X 41 214 SF X 43 216 SP2 SP1 X 45 X 44 X 46 218 220 KR 222 FR 224 X 47 X 48 226 X 1 X 2 303 X 27 X 28 301 SV5 X 42 202 202 202 L15 N 3 F2 3 A5 1 C12 1 F12 X 40 204 X 39 X 14 3 A5 3 E2 ...

Page 64: ...1 2 F11 2 F11 X 49 X 50 X 51 X 52 X 55 X 56 X 58 X 57 X 10 X 18 RT7 416 X 62 X 61 Note It indicates the field wiring in the dotted box S3 code setting code 1 ON indicates single head OFF indicates dual heads code 2 ON indicates there is not oil temperature sensor OFF indicates there is RT5 408 X 54 X 53 RS485 Communication Line P I X 64 X 63 1 E10 24V BP1 502 P I X 66 X 65 BP2 504 1 E10 0V X 19 X ...

Page 65: ...ed type water cooled screw chiller MIC MCAC CTSM 2018 1 64 TC BP P I RT KA EVD FU L17 N1 L19 L15 N 605 603 601 607 X 69 X 68 X 67X 70 611 613 615 617 X 74 X 73 X 72 X 71 609 1 C12 1 F12 Black White Red Green ...

Page 66: ... 1TA1 1TA2 1FR 1KM1 1KM3 1KM2 2TA1 2TA2 2KM1 2KM3 2KM2 2FR 1U 1V 1W 1Y 1X 1Z 2U 2V 2W 2Y 2X 2Z QF1 QF2 1KM1 2KM1 SB UR1 L11 L15 103 105 24V 0V 1 G2 4 F2 1 G2 3 B7 X 33 X 34 L15 N 202 222 X 30 X 29 X 31 X 32 N 1 C11 1 E11 JTX A L1 L2 L3 L N S1 S2 M1 M2 X 33 X 34 L15 N 202 236 1 C11 1 E11 1EH 2EH EV 2 B2 2 E2 1 3 5 7 9 11 1ST1 1ST2 1ST1 1ST2 3 B7 3 B10 3 B10 232 202 3 B9 3 B9 1 G4 1 G4 1SF 2SF 101 4...

Page 67: ... MCAC CTSM 2018 1 66 1KA 2KA 1FR 2FR 1KM3 1KM1 1KM1 1KT 1KM2 1KM3 1KT 107 109 111 117 119 121 123 1KM3 1KT 1KM2 1KM2 113 115 2KM3 2KM1 2KM1 2KT 2KM2 2KM3 2KT 125 131 133 2KM3 2KT 2KM2 2KM2 127 129 1 C11 1 E11 3 F2 3 F2 L15 N 4 A5 4 A5 5 B1 5 B1 ...

Page 68: ...55 220 1SF X 57 222 1SP2 1SP1 X 59 X 58 X 60 224 226 KR 232 1FR 234 X 66 238 2SP2 2SP1 X 62 X 61 X 63 228 230 2SF X 65 X 64 236 X 8 X 7 321 X 38 X 40 X 42 X 39 X 41 309 311 313 2YV1 2YV2 2YV3 X 4 X 3 307 X 1 X 2 305 X 56 202 202 202 L15 N X 35 X 36 301 2SV5 4 E2 4 F2 X 52 204 X 53 X 54 206 X 19 2 B12 2 E12 Note It indicates the field wiring in the dotted box X 37 303 2YV3 1SV5 ...

Page 69: ... X 72 X 76 X 77 X 71 X 75 X 78 X 67 X 14 X 23 RT7 416 X 81 X 82 RT8 418 X 84 X 83 Note It indicates the field wiring in the dotted box S3 code setting code 1 ON indicates single head OFF indicates dual heads code 2 ON indicates there is not oil temperature sensor OFF indicates there is RT5 406 X 73 X 74 RT6 406 X 80 X 79 RS485 Communication Line P I X 86 X 85 1 E10 24V 1BP1 502 P I X 88 X 87 504 1...

Page 70: ... I 2BP P I 1RT 2RT 1KA 2KA 1EVD 2EVD FU L17 N1 L19 L15 N 605 603 601 607 X 95 X 94 X 93 X 96 X 103 X 102 X 101 X 104 623 621 619 625 611 613 615 617 629 631 633 635 X 100 X 99 X 98 X 97 X 108 X 107 X 106 X 105 627 609 2 B12 2 E12 Black White Red Green Black White Red Green ...

Page 71: ...ny Arrange for a specialist company to unload the machine Safety is only guaranteed if these instructions are followed carefully If this is not the case there is a risk of damage or injury 1 Unit installation 1 Lifting 1 When transporting the unit avoid collision between the unit and other objects 2 Move the unit by placing a roller at the bottom of the unit to avoid damage 3 Choose a suitable cra...

Page 72: ...t an absorber between the unit and basement and keep the unit balanced Install a shockproof foundation when necessary 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 isolat...

Page 73: ...bration Isolator Running weight kg Minimum load bearing kg EA Minimum Quantity Minimum load bearing kg EA Quantity LSBLG340 MCF 900 4 900 4 2515 LSBLG440 MCF 1000 4 1000 4 2560 LSBLG540 MCF 1200 4 1200 4 2935 LSBLG720 MCF 1400 4 1400 4 3800 LSBLG805 MCF 1800 4 1800 4 4210 LSBLG890 MCF 1800 4 1800 4 4300 LSBLG1055 MCF 2000 4 2000 4 5470 LSBLG1200 MCF 2200 4 2200 4 6482 LSBLG1300 MCF 2200 4 2200 4 6...

Page 74: ...tion of chilled water and lead to freezing If the hardness of chilled water is too high furring may occur easily and corrode the devices Therefore the quality of chilled water should be analyzed including PH value conductivity and the concentration of chloride and sulfide ions 1 Avoid NH4 ammonium ions in the water as they are very damaging to copper This is one of the most important factors for t...

Page 75: ...compare it with the nominal values If pump out storage tank and or pump out equipment are installed ensure the pump out condenser water has been piped in Check for field supplied shutoff valves and controls as specified in the job data Check for refrigerant leaks on field installed piping 2 Performance adjustment factors Ethylene and Propylene Glycol Factors A glycol solution is required when the ...

Page 76: ...6 in follow table Temperature drops outside this range can affect the control system s capability to maintain acceptable control and are not recommended Fouling Factor Height m Difference between water inlet and outlet temp 0 018m 2 kW 0 044m 2 kW 0 086m 2 kw 0 172m 2 kw C P C P C P C P Sea level 3 1 020 1 021 1 014 1 014 0 988 0 992 0 962 0 990 4 1 032 1 023 1 021 1 016 0 993 0 998 0 968 0 992 5 ...

Page 77: ...iping 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 elevatio...

Page 78: ... pipeline and drain pipeline must 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 4 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 v...

Page 79: ... will stop foreign material from entering into and decreasing the performance of the evaporator 8 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 9 Flushing and insulating the water piping must be done before it is conne...

Page 80: ...g the insulation layer with a moisture proof seal 19 Any water piping to the unit must be protected to prevent freezing There are reserved terminals for the auxiliary electrical heater Logic in PCB will transmit an ON OFF signal by checking the leaving evaporator water temperature Note The unit only supplies the ON OFF signal but not the 220V power If a separate disconnect is used for the 220V sup...

Page 81: ...with protective pipes to avoid intervention of supply lines in control cable Power section Connect the power supply cable to the control cabinet when it arrives at the jobsite The power supply cable is connected to the terminals of L1 L2 L3 N and PE and the terminals need to be fixed again after 24h running the minimum allowed time Please seal the entering wiring hole after users installed the mai...

Page 82: ...trol of water pump is not needed ensure that the water pump starts before starting the machine CAUTION An independent power supply box needs to be equipped with the power supply of the water pump 8 The wiring ports for remote start stop flow switch cool warm switch water pump linked control alarm indication are reserved in the electrical cabinet of the unit 9 Passive inching button is used for rem...

Page 83: ...fully inspect all the electrical lines with a multimeter and check that all connections are properly installed Carry out measurement in mega ohm and ensure that there is no short circuit at the shell Inspect whether the earth wire is properly installed and whether the insulation resistance to ground exceeds 2MΩ And inspect whether the supply line meets capacity requirements 6 Inspect whether the d...

Page 84: ...tly locked to prevent refrigerant leaks 2 Inspect whether moisture content of the system exceeds the limit Excessive moisture content in the refrigerant system of the unit might cause ice blocks copper plating etc that will seriously affect the safety of the unit Therefore the dryness of the refrigerant system of the unit must be inspected with the sight glass before and when the unit is running P...

Page 85: ...pect whether the fixing bolts of the unit e g fixing bolts at compressor base angle at post and beam of the unit and at pipe clamp etc and of the electrical elements e g fixing bolts of PCB and insulating transformer and connection bolts of upper lower terminals of AC contactor etc are firmly fixed 9 Inspect the connections in the electrical cabinet for looseness especially the electric part in th...

Page 86: ...anual supplied with the unit is final 11 Target type flow control is set on the chilled water pipeline and must be installed at the chilled water outlet of the unit The NO contact of the target type flow control in the chilled water system must be connected to the control circuit as per the wiring diagram Note Disordered water flow may lead to wrong action of the flow switch therefore the control ...

Page 87: ...and R134a respectively under relative pressure The types of refrigerants indicated in different pressure gauges might differ Table 1 If the high low voltage deviates much from the saturation pressure corresponding to the current temperature more than 2bar leakage or insufficient refrigerant is likely in the system 2 Inspect the unit for normal heating Before start up inspect whether the oil heatin...

Page 88: ...re sensor is working normally and whether the connection is firm and reliable 6 Inspect whether the flow in the water pump meets the requirements of the unit 7 Inspect whether the power supply of the unit is stable 2 Parameters Inspections during Start up and Operation 1 The maximum range of parameters for normal operation of R134a refrigerant unit See table 2 for the maximum range of performance ...

Page 89: ...ers are empty evacuate the remaining gas pressure and move the cylinders to a place designated for their recovery Do not incinerate Ensure that you use the correct refrigerant type before recharging the unit Charging any refrigerant other than the original charge type R 22 will impair machine operation and can even destroy the compressors The compressors operating with this refrigerant type are lu...

Page 90: ...a water tower It should be recognized that atmospheric air contains many contaminants that increase the need for proper water treatment The use of untreated water can result in corrosion erosion sliming scaling or algae formation Use a reliable water treatment company 6 Remove the condenser heads at least once a year to inspect the condenser tubes and clean if required Recommended maintenance sche...

Page 91: ... insulation resistance yearly It should be over 5 MΩ when measuring with a DC 500V ohmmeter When touching the shockproof rubber it should be elastic or the rubber will age Every 3 000 hours inspect vibration and oil Every 6 000 hours check the safety device and protective device to guarantee normal operations Important The normal oil level is in the middle of sight glass Add lubricating oil if the...

Page 92: ...r operators in the following aspects 1 Stress safety in shutdown and operation processes 2 Require users to carefully read the operation manual of the unit Explain to users that the operation of the unit must be carried out strictly as per the steps and methods specified in the operation manual If anyone has any problems about descriptions in the manual consult after sale personnel or professional...

Page 93: ... of the unit when it is running must be clearly recorded in details and reported to after sales or factory personnel Do not forcibly start up the unit unless permitted 2 Maintenance If the problem is serious contact your local Midea office or your local representative for assistance Cleaning Heat Exchangers Check the chiller tightness and whether there s leak in the heat exchange tubes It is neces...

Page 94: ...g tower flume should keep at the rated value if cleaning is performed when the unit is running Midea assumes no responsibility for pressure vessel damage resulting from untreated or improperly treated water Requirement for cleaning and maintenance Water quality Scale Corrosion Remark 1 PH 6 Acid water Hard Strong Generates insoluble CaSO4 2 PH 8 Alkali water Soft Soft fluid deposit may be caused b...

Page 95: ...sed detergent should be neutralized with lime or soda before draining Detergent is harmful Keep it away from children Turn on the unit after cleaning to ensure it is clean clean it again c Precautions for chemical cleaning When you clean wear rubber gloves and do not expose your skin or your clothes to detergent If you touch the detergent wash with it off clean water immediately The container for ...

Page 96: ... 0 2 non condensable will remain Check on the refrigerant charge To verify that the unit is operating with the correct refrigerant charge perform the following checks 1 Run the unit at maximum operating load 2 Check that the leaving chilled water temperature is between 6 8 C 3 Check that the entering cooling water temperature is between 25 32 C 4 Under the above conditions verify the following ite...

Page 97: ...harging line to the service valve on the bottom of the evaporator Purge the connecting line stand the drum with the connection up and place the service valve in the open position Before replacing the electronic expansion valve or thermal expansion valve of the system pressure sensor sampling shut valve low pressure pipeline etc force the refrigerant in the liquid part of the system The particular ...

Page 98: ...s feeds the jet pump that creates a depression which allows the suction of the oil refrigerant mixture from the evaporator into the compressor to re establish the oil level inside the lubrication system On the oil recovery piping a sight glass allows users to check the oil gas mixture flow to the compressor If flow is insufficient or the unit stops for s Low Oil Level alarm verify the correct oper...

Page 99: ...il pressure is typically less than 150kPa for a system with clean internal and external filters To determine the oil pressure drop due to the oil lines and external filter only connect a gauge to the oil pressure bleed port Compare this value to the discharge pressure read at the touch screen If this value exceeds 150 kPa replace the external filter Moisture Liquid Indicator Clear flow of liquid r...

Page 100: ...switch protection Protects the compressor and the water pump motor from burning because there is lack of cooling water or chilled water Protection of the sensor fault Ensures the data from the sensor is correct to prevent the system from wrong action Oil level and oil pressure difference protection Ensures the compressor can run normally High discharge temperature protection Enables the compressor...

Page 101: ...sor resets faults on the screen must be cleared manually when both temperature and time conditions are satisfied the chiller can restart Leaving cooling water temperature sensor short circuit open circuit display leaving cooling water temperature fault and chiller stops according to abnormal shutdown program After the sensor reset fault on screen must be cleared manually when both temperature and ...

Page 102: ...ly when both temperature and time conditions are satisfied the chiller can restart Compressor motor protection Alarm when compressor protection module trips Execute the abnormal protective shutdown program immediately Faults on screen must be confirmed and cleared manually when both temperature and time conditions are satisfied the chiller can restart Compressor overload protection Thermal overloa...

Page 103: ... is too low 4 Contactor Protection The coil of the contactor does not perform suction normally The compressor will stop running immediately Reset manually on the touch screen 1 The suction of the contactor is abnormal when Y type switches to type 2 The vibration during operations cause the contact to loosen 5 Anti freezing Protection Anti freezing switch OFF The compressor will stop running immedi...

Page 104: ...ors in the unit cannot run Reset it manually on the touch screen 1 The refrigerant is not enough 2 EXV fails and cannot work normally 3 The delay time of low pressure switch alarm is too short 4 There is plugging in the filter 5 Some water enters the refrigerant system in evaporator 6 Poor system matching the evaporator is too small or the compressor is too large 7 There is too much oil in the sys...

Page 105: ...emperature is greater than the setting value 1 The cooling tower can not work normally 2 The cooling water flow not enough 13 Chilled Entering Water Temperature Sensor Failure Chilled entering water temperature sensor is abnormal open circuit or short circuit The compressor will stop running immediately Reset it manually on the touch screen 1 The temperature sensor fails 2 The wiring connection is...

Page 106: ...75 9 32 40 57 72 8 94 112 2 63 7 261 4 33 38 89 73 8 643 113 2 559 6 247 8 34 37 3 74 8 358 114 2 489 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86...

Page 107: ...29 8 372 69 1 718 109 0 478 10 58 270 30 8 013 70 1 659 110 0 464 9 55 099 31 7 669 71 1 601 8 52 123 32 7 342 72 1 546 7 49 328 33 7 031 73 1 492 6 46 703 34 6 735 74 1 441 5 44 235 35 6 453 75 1 392 4 41 896 36 6 183 76 1 346 3 39 697 37 5 927 77 1 301 2 37 628 38 5 683 78 1 258 1 35 682 39 5 450 79 1 217 0 33 849 40 5 228 80 1 177 1 32 115 41 5 016 81 1 139 2 30 483 42 4 813 82 1 101 3 28 944 4...

Page 108: ... 8 62 69 2 29 109 0 77 10 42 25 30 8 31 70 2 22 110 0 75 9 40 56 31 8 01 71 2 16 8 38 76 32 7 72 72 2 10 7 37 05 33 7 45 73 2 04 6 35 43 34 7 19 74 1 98 5 33 89 35 6 94 75 1 92 4 32 43 36 6 69 76 1 87 3 31 04 37 6 46 77 1 81 2 29 72 38 6 24 78 1 76 1 28 47 39 6 03 79 1 71 0 27 28 40 5 82 80 1 66 1 67 74 41 5 63 81 1 62 2 26 13 42 5 43 82 1 57 3 25 03 43 5 25 83 1 53 4 23 99 44 5 08 84 1 49 5 22 99...

Page 109: ...emp Ratio Temp Ratio Temp Ratio Temp Ratio 40 1630 77 35 1178 11 30 860 97 25 636 08 20 474 78 15 357 83 10 272 18 5 208 83 0 161 56 5 125 97 10 98 96 15 78 29 20 62 37 25 50 00 30 40 34 35 32 73 40 26 71 45 21 92 50 18 08 55 14 99 60 12 48 65 10 44 70 8 78 75 7 41 80 6 28 85 5 34 90 4 56 95 3 91 100 3 37 105 2 91 110 2 52 115 2 19 120 1 91 125 1 67 130 1 46 135 1 28 140 1 13 145 1 00 150 0 89 ...

Page 110: ... piping and control wiring factory installed C Unit shall be shipped charged with oil and full charge of refrigerant HFC 134a or a nitrogen holding charge as specified on the equipment schedule D Unit shall be shipped with firmly attached labels that indicate name of manufacturer chiller model number chiller serial number and refrigerant used E Unit shall be sufficiently protected from the factory...

Page 111: ...r shall be limited to main power leads to the starter and wiring water pumps and tower fans to the chiller control circuit a NEMA 1 enclosure with integral fan cooling and lockable hinged doors b Main power disconnect non fused type c Capability to start and stop chiller pumps and tower fans d 1 kVA control oil heater transformer e The following are standard features 1 Phase loss 2 Phase reversal ...

Page 112: ...50 or 60 Hz Adjustable frequency range from 30 to 50 Hz or 30 to 60 Hz f VFD Electrical Service single point power 1 VFD shall have input circuit breaker with minimum 50 000 amp interrupt capacity 2 VFD shall have standard 1 kVA control power transformer with circuit breaker provides power for oil heater VFD controls and chiller controls 3 Input power shall be 380 or 460 VAC 10 3 Phase 50 60Hz 1Hz...

Page 113: ...efficiency 8 A reseating type pressure relief valve shall be installed on each heat exchanger G Refrigerant Flow Control 1 To maintain optimal part load efficiency the refrigerant expansion device to the cooler shall use a EXV H Controls Safeties and Diagnostics Controls a The chiller shall be provided with a factory installed and wired microprocessor control center The microprocessor can be confi...

Page 114: ...atuses from other like controllers connected on a common network including controller maintenance data j Chilled Water Reset The control center shall allow reset of the chilled water temperature set point based on any one of the following criteria 1 Chilled water reset based on an external 4 to 20 mA signal 2 Chilled water reset based on a remote temperature sensor such as outdoor air 3 Chilled wa...

Page 115: ...able limits the override condition shall be terminated and the chiller shall revert to normal chilled water control 3 Multiple Chiller Control The chiller controls shall be supplied as standard with a two chiller lead lag and a third chiller standby system The control system shall automatically start and stop a lag or second chiller on a two chiller system If one of the two chillers on line goes i...

Page 116: ... Building 6 Midea Avenue Beijiao Shunde Foshan Guangdong China Postal code 528311 Tel 86 757 26338346 Fax 86 757 22390205 cac midea com global midea com Note The data in this book may be changed without notice for further improvement on quality and performance LSBLG MCF Flooded Type Model TechnicalServiceManual Water Cooled Screw Chiller ...

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