Midea MWSC1080A-FB3 Manual Download Page 65

Page: 65 / 114

Flooded type water cooled screw chiller (PCB Control)

1780

370.8x2

500/5

3.7

Field wiring

1) Wiring diagram

Power supply wiring diagram

Summary of Contents for MWSC1080A-FB3

Page 1: ...reserves the right to discontinue or change specification or designs at any time without notices and without incurring obligations DM15 01 01 18en MWSC340A FB3 MWSC440A FB3 MWSC540A FB3 MWSC690A FB3 M...

Page 2: ...cess 34 4 Sensors 35 5 Parts control 36 6 Operation part 44 7 Safety protection 57 IV Electrical control 59 1 Electrical data 59 2 Electrical components introduction 60 3 Electrical parts parameter se...

Page 3: ...of material deterioration and injuries to personnel Never cover any safety devices This applies to the relief valve s in the refrigerant circuit s Ensure that the valves are correctly installed before...

Page 4: ...tenance operations are carried out on the unit lock the power supply circuit ahead of the machine 4 If the work is interrupted always ensure that all circuits are still deenergized before resuming the...

Page 5: ...the circuit can be isolated Only charge liquid refrigerant R134a at the liquid line Ensure that you are using the correct refrigerant type before recharging the unit Charging any refrigerant other th...

Page 6: ...d within the valve body or mechanism If necessary replace the device Do not install safety valves in series or backwards ATTENTION No part of the unit must be used as a walkway rack or support Periodi...

Page 7: ...d MWSC340A FB3 380V 3Ph 50Hz 340 1 MWSC440A FB3 380V 3Ph 50Hz 440 1 MWSC540A FB3 380V 3Ph 50Hz 540 1 MWSC690A FB3 380V 3Ph 50Hz 690 1 Dual head MWSC805A FB3 380V 3Ph 50Hz 805 1 MWSC890A FB3 380V 3Ph 5...

Page 8: ...Flooded type water cooled screw chiller PCB Control 7 3 External appearance Single head MWSC340A FB3 MWSC890A FB3 Dual head MWSC1080A FB3 MWSC1780A FB3...

Page 9: ...iciency heat exchange technology High efficiency shell and tube heat exchanger 2 path straight water pipe easy to clean End cover can be exchanged to meet customer s requirement for condenser Capacity...

Page 10: ...ring High precision large sized axial and radial bearings are selected to support the male and female rotors for long lasting life With effective lubrication system the bearing service life can be fur...

Page 11: ...stator provides best dissipation of heat and no requirement for computer room AC To reach high operation efficiency the casing is manufactured by precise machining centers and inspected by a coordina...

Page 12: ...be expansion are designed to prevent leakage and increase the durability of heat exchanger Condenser Midea condenser has a specially designed baffle in the entrance of condenser to prevent direct impi...

Page 13: ...ide the compressor and the other is built in oil separator located inside of the condenser The refrigerant and oil mixture gets separated in the internal oil separator for the first time and then to t...

Page 14: ...000 1000 Connection type Victaulic coupling Water inlet outlet pipe dim mm 150 150 150 200 200 200 Unit length mm 3550 3550 3550 3600 3600 3600 Unit width mm 1220 1220 1220 1420 1440 1440 Unit height...

Page 15: ...000 1000 1000 Connection type Victaulic coupling Water inlet outlet pipe dim mm 200 200 200 200 200 Unit length mm 4600 4600 4600 4800 4800 Unit width mm 1520 1520 1520 1620 1620 Unit height mm 2035 2...

Page 16: ...600 1520 2035 3850 1400 443 350 325 1075 350 618 DN200 MWSC1200A FB3 4600 1520 2035 3850 1400 443 350 325 1075 350 618 DN200 MWSC1385A FB3 4600 1520 2035 3850 1400 443 350 325 1075 350 618 DN200 MWSC1...

Page 17: ...Flooded type water cooled screw chiller PCB Control 16 5 Refrigeration system For single head unit MWSC340 890A FB3 For dual heads unit MWSC1080 1780A FB3...

Page 18: ...nfinitely variable control down to 25 of its total capacity This control is made by means of capacity slides controlled by microprocessors Standard starter is star delta type Infinitely capacity contr...

Page 19: ...or comes from MANN of Germany and has reliable qualification The oil content can be controlled below 3ppm the oil content treated by oil gas separator of common like screw type air compressor is no le...

Page 20: ...periodical checks by the user or operator must be included in the supervision and maintenance file 6 2 2 Repair Any repair or modification including the replacement of moving parts Must follow local r...

Page 21: ...n tubes Replaceable water tubes are fabricated from integral finned cooper and mechanically bonded to steel tube sheets The condenser is GB151 1999 Chinese Standard designed constructed inspected and...

Page 22: ...e the compressor s are operating 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 ra...

Page 23: ...A FB3 MWSC1385A FB3 MWSC1620A FB3 MWSC1780A FB3 0 10 20 30 40 50 60 70 80 90 100 20 70 120 170 220 Water pressure drop kPa Water flow m3 h Water pressure drop curve condenser MWSC340A FB3 MWSC440A FB3...

Page 24: ...line 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 1...

Page 25: ...rage and transport temperature 15 50 Applicable altitude range No more than 1000m MWSC_A FB3 evaporator Minimum Maximum Entering temperature at start up 9 C 22 C Leaving temperature during operation 5...

Page 26: ...6 421 15 67 18 412 76 69 42 Note The above parameters are in accordance with the 7 C evaporator water outlet 30 C condenser water inlet MWSC440A FB3 Chilled Water Outlet Temp Cooling Water Inlet C 25...

Page 27: ...above parameters are in accordance with the 7 C evaporator water outlet 30 C condenser water inlet MWSC690A FB3 Chilled Water Outlet Temp Cooling Water Inlet C 25 00 26 00 27 00 29 00 30 00 32 00 33...

Page 28: ...161 98 Note The above parameters are in accordance with the 7 C evaporator water outlet 30 C condenser water inlet MWSC890A FB3 Chilled Water Outlet Temp Cooling Water Inlet C 25 00 26 00 27 00 29 00...

Page 29: ...26 1311 12 215 20 Note The above parameters are in accordance with the 7 C evaporator water outlet 30 C condenser water inlet MWSC1200A FB3 Chilled Water Outlet Temp Cooling Water Inlet C 25 00 26 00...

Page 30: ...6 48 1681 39 275 37 Note The above parameters are in accordance with the 7 C evaporator water outlet 30 C condenser water inlet MWSC1620A FB3 Chilled Water Outlet Temp Cooling Water Inlet C 25 00 26 0...

Page 31: ...291 01 1909 94 294 17 1892 14 297 33 1855 65 304 47 1836 96 308 45 1799 58 317 32 1772 29 322 83 1717 70 333 85 9 00 1982 92 293 15 1966 31 296 31 1949 69 299 47 1914 39 306 92 1895 70 311 20 1856 54...

Page 32: ...amper SHA 2600 340 440 540kW To avoid vibration and noise it must be used between base and foundation when install the unit 4 SHA 3200 690 1780kW 3 Remote control cabinet GX03501 Can be installed in t...

Page 33: ...nput 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 Min...

Page 34: ...ler PCB Control 33 2 Energy adjustment The unit adjust capacity by chilled water The control logic see picture Energy adjustment is districted when starting high pressure is too high High pressure 19B...

Page 35: ...illed pump on Cooling pump on cooling tower on Water flow switch protection Stop Clear failure YES NO Water temp is ok Oil heating time is enough Stop time is enough NO Stand by YES Compressor 25 SV o...

Page 36: ...10k 25 4 Cooling leaving water temp NTC 10k 25 5 Discharge temp 6 EXV discharge temp NTC 10k 25 Carel 202301300561 Thermistors For PTC thermistors resistances vary with various temperatures Location...

Page 37: ...able in the field If the compressor motor thermistor fails compressor replacement is required 2 pressure sensors The pressure sensors are pressure transmitters Danfoss AKS3000 are used Water temp ther...

Page 38: ...ature 20 C real time value oil heating time for first startup is 8hrs If power down happens during operation and downtime is less than 1hrs no heating time delay is needed when unit restarts If it exc...

Page 39: ...se controller It detects discharge pressure temperature and calculate discharge superheat Then it control EXV opening depending on superheat If it is wrong EXV will output alarm signal to main base co...

Page 40: ...Control 39 If the parameter need to be displayed and set Interface should be changed Display to power supply 1 Display suction superheat 2 Display EXV opening 3 Relay output status 4 Alarm 5 Start of...

Page 41: ...display switches to Confirm the list of parameters and return the value Running display status display all status c Controller parameter checking and changing Checking or changing repair parameters st...

Page 42: ...R134a Valve type Danfoss ETS 250 Drive hardware configuration 3 13 Type of probe S1 User defined Unit type Fin coil evaporator air conditioner Drive hardware configuration 4 13 Type of probe S1 NTC Ca...

Page 43: ...meters Control mode shell and tube unit Overheat degree 6 Valve opening upon start 50 Pre positioning delay 6 Valve opening in standby state 0 Power supply mode 1 Available values include 1 0 24 V AC...

Page 44: ...rotection threshold 1 LowSH protection integration time 2 5 LOP protection threshold 50 LOP protection integration time 4 MOP protection threshold 50 MOP protection integration time 10 Low overheat de...

Page 45: ...ndow 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 his...

Page 46: ...ight are as following Yellow indicator is the power indicator It keeps lighting under normal condition if it is not light please check if the power supply wiring is correct Green indicator is the touc...

Page 47: ...n process will be continued when minimum running time is satisfied Pause The compressor startup conditions are not satisfied The compressor startup condition includes 1 Water temperature is not satisf...

Page 48: ...s 1 2 cannot be set after startup Current status of machine is standby it cannot startup under malfunction status Please confirm if the oil heating is complete If not machine may stay in a pause state...

Page 49: ...ine is powered on it will display standby status normally Unit operation the start up of the unit is finished Pause state Control water temperature to be lower than water temperature of paused state T...

Page 50: ...perature sensor displaying of unit with oil temperature sensor Figure 6 6 Displaying contents of status information including the following Display refrigerant type of the unit Display operating time...

Page 51: ...rt need to be NO if it is YES the delay time to start the unit is not reached Water Temperature Allow Compressor Start need to be YES if it is NO that means the current water temperature is not satisf...

Page 52: ...operates and contactor has action 3 Status information output status Output status page ON represents the output point is powered on OFF represents the input point is powered off When the unit is in...

Page 53: ...User parameter setting temperature setting Input the password 40828 and enter the page as figure 6 12 as below Figure 6 12 MAX at the top left of setting window is upper limit of parameter setting and...

Page 54: ...n startup 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 s...

Page 55: ...r shutdown according to the timer setting If the unit needs to continue running for a period for example start from Tuesday 10 00 and shutdown at 16 00 Thursday user can set as 10 00 and switch the bu...

Page 56: ...green represents fault has been eliminated Note the high pressure protection cannot resume automatically user needs to find the high pressure protection switch and reset it manually the over load pro...

Page 57: ...Flooded type water cooled screw chiller PCB Control 56 Figure 6 17 Please refers to the actual operation interface it is subject to change without notice...

Page 58: ...le 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 loses the module will cut off main powe...

Page 59: ...the malfunction record page of touch screen Sometimes if the malfunction cannot be solved by reset consider replace the pressure switches Evaporator protection Low Chilled Leaving Water Temperature PC...

Page 60: ...ed current A 241 6 260 7 333 2 369 6 429 5 Rated current A 126 5 133 162 179 5 208 5 Rated power kW 74 78 95 105 126 Crankcase heater Voltage V 220 220 220 220 220 220 220 220 220 Total input kW 0 3 0...

Page 61: ...to drive 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 based on...

Page 62: ...Flooded type water cooled screw chiller PCB Control 61...

Page 63: ...and the valve is open 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...

Page 64: ...se a value that is smaller 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 Compress...

Page 65: ...Flooded type water cooled screw chiller PCB Control 64 1780 370 8x2 500 5 3 7 4 Field wiring 1 Wiring diagram Power supply wiring diagram...

Page 66: ...AWG1 MWSC1385A FB3 4 AWG600 AWG300 MWSC690A FB3 4 AWG4 0 AWG1 0 MWSC1620A FB3 4 2 AWG300 AWG300 MWSC805A FB3 4 AWG300 AWG4 0 MWSC1780A FB3 4 2 AWG400 AWG500 MWSC890A FB3 4 AWG400 AWG4 0 Notice The gi...

Page 67: ...ectrical cabinet of the unit with the numbers shown in the diagram below Remote start stop switch need to use inching switch Lamp input 220VAC Only double head Inside electric control cabinet Customer...

Page 68: ...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...

Page 69: ...tted 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...

Page 70: ...1 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 head...

Page 71: ...ooded type water cooled screw chiller PCB Control 70 TC BP P I RT KA EVD FU L17 N1 L19 L15 N 605 603 601 607 X 69 X 68 X 67 X 70 611 613 615 617 X 74 X 73 X 72 X 71 609 1 C12 1 F12 Black White Red Gre...

Page 72: ...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...

Page 73: ...PCB Control 72 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...

Page 74: ...0 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...

Page 75: ...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 head...

Page 76: ...P 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...

Page 77: ...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 installati...

Page 78: ...ration and noise put an absorber between the unit and basement and keep the unit in balance Install a shockproof foundation when necessary Vibration isolators are recommended for all roof mounted inst...

Page 79: ...Isolation pad Vibration Isolator Running weight kg Minimum load bearing kg EA Minimum Quantity Minimum load bearing kg EA Quantity MWSC340A FB3 900 4 900 4 2700 MWSC440A FB3 1000 4 1000 4 2820 MWSC54...

Page 80: ...ring about resonance or noise 5 Put the unit indoors which should be well ventilated with low humidity and little dust 2 Water pipeline system installation 1 Water quality control When industrial wate...

Page 81: ...on method Propylene Glycol Propylene glycol Evaporator side Quality of glycol Cooling capacity modification Power modification Water flow modification Water resistance Freezing point 30 0 968 0 969 1...

Page 82: ...960 1 031 0 938 1 026 C Cooling capacity P Power 3 Design of the store tank in the system a kW is the unit for cooling capacity L is the unit for G minimum water flow volume in the formula Comfortabl...

Page 83: ...d flow switch is provide by user 2 Chilled water piping suggested piping as follow Chiller cooler WS c d e g h j i k b Cooler return water Cooler outlet water Return water Outlet water make up water e...

Page 84: ...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 inter...

Page 85: ...outlet has been equipped with a 1 2 plug 12 In order to expel the air from water system install an automatic discharge valve on the highest place of local water pipe and the horizontal pipe should be...

Page 86: ...ting current and rated value is too big eliminate the system failures until the actual operating current is satisfied 22 Inspect whether the water replenishing device for the expansion tank is smooth...

Page 87: ...cating via shield wire protected by sleeve and paved separate from supply line 5 The control output cable to be connected on site shall be AC250V 1mm2 and 0 75mm2 shield wire 24 V shall be used for co...

Page 88: ...ll the electrical lines with a multimeter and whether the connections are properly installed Carry out measurement in mega ohm and ensure that there is no short circuit at the shell Inspect whether th...

Page 89: ...gerant 2 Inspect whether moisture content of the system exceeds the limit Excessive moisture content in the refrigerant system of the unit might cause ice block copper plating etc that would seriously...

Page 90: ...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 of insulating transformer and connection bolts of upper lower terminals of AC contac...

Page 91: ...n the chilled water pipeline which shall be installed at the chilled water outlet of the unit The NO contact of the target type flow control in the chilled water system shall be connected to the contr...

Page 92: ...ively under the 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...

Page 93: ...whether the temperature sensor is in normal condition 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...

Page 94: ...llegal When cylinders are empty evacuate the remaining gas pressure and move the cylinders to a place designated for their recovery Do not incinerate Ensure that you are using the correct refrigerant...

Page 95: ...ins 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 It is recommended that the service...

Page 96: ...d it should be over 5M when measuring with ohmmeter of DC 500V When touching the shockproof rubber it should be elastic or it means the rubber gets ageing Every 3000 hours make middle inspection of vi...

Page 97: ...following aspects 1 Stress the safety in shutdown and operation processes 2 Require the users to carefully read the operation manual of the unit Explain to the users that operation of the unit shall...

Page 98: ...s to the unit it is forbidden to forcibly start up the unit unless under the instructions of professionals Exceptional temperature pressure sound or vibration etc of the unit during the running shall...

Page 99: ...10 Warning When doing cleaning with unit stops volume of cooling tower flume can be 1 2 or 1 3 of rated value but if doing cleaning with unit is runs the volume of cooling tower flume should keep rat...

Page 100: ...with clean water The container for detergent should be made of plastic or glass rather than lead The used detergent should be neutralized with lime or soda before draining Detergent is harmful to huma...

Page 101: ...up to zero Then the system is once again evacuated to approximately 230Pa 2mmHg This is repeated three times The first pull down will remove about 90 of the non condensable the second about 90 of tha...

Page 102: ...al requirement estimated for the unit can be charged in this manner After 75 of the required charge has entered the condenser reconnect the refrigerant drum and charging line to the service valve on t...

Page 103: ...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 r...

Page 104: ...e differential discharge pressure minus oil 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 ext...

Page 105: ...Water flow switch protection Protects the compressor and the water pump motor from burn because there is lack of cooling water or chilled water Protection of sensor fault Ensures the data from sensor...

Page 106: ...screen must be cleared manually when both temperature and time condition gets satisfied the chiller can restart Leaving cooling water temperature sensor short circuit open circuit display leaving cool...

Page 107: ...ure and time condition gets satisfied the chiller can restart Compressor motor protection Alarm when compressor protection module trips Perform abnormal protective shutdown program immediately Fault o...

Page 108: ...of thermal relay too low 4 Contactor Protection The coil of contactor does not suction normally The compressor stop running immediately Reset manually on the touch screen 1 The suction of the contacto...

Page 109: ...s to work all of the compressors in the unit cannot run Reset manually on the touch screen 1 The refrigerant not enough 2 EXV failure cannot work abnormally 3 The delay time of low pressure switch ala...

Page 110: ...ture 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 tempera...

Page 111: ...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 29...

Page 112: ...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...

Page 113: ...9 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 0...

Page 114: ...io 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...

Search results

Summary of Contents for MWSC1080A-FB3

Reviews:

Related manuals for MWSC1080A-FB3

Brands by name

Popular brands

Midea MWSC1080A-FB3, Manual

Search results

Summary of Contents for MWSC1080A-FB3

Reviews:

Related manuals for MWSC1080A-FB3

Brands by name

Popular brands