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3.3 MAJOR REFRIGERATION COMPONENTS

The model MAC240 is equipped with two Copeland hermetic scroll compressor. The compressors have a rated cooling
capacity of 12 tons each and one compressor is used in each refrigerant circuits. Located in the condensing section and
are accessible through front access door. Compressors are conforming to ARI540 STD.

The compressors are equipped with internal motor protection, factory installed crankcase heaters and rubber vibration
isolators for quiet and efficient operation. Each compressor has lock-out devices to protect it from short cycling when
tripped by safety controls. Each compressor has separate condenser coil with safety controls. The diesel generator-set
drives the compressor integral motor.

3.3.1 Scroll Compressor

Scroll working principal is briefly described as below:

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Содержание MAC-240

Страница 1: ...MOBILE AIR CONDITIONING SYSTEM Model MAC 240 INSTALLATION OPERATION MAINTENANCE MANUAL...

Страница 2: ...7 3 3 6 EVAPORATOR FAN 17 3 3 7 HOT GAS BY PASS CONTROL 18 3 3 8 CRANKCASE HEATER 18 3 3 9 REPLACEABLE CORE FILTER DRIER 18 3 3 10 SIGHT GLASS 18 3 3 11 FAN CYCLE HEAD PRESSURE CONTROL 18 3 3 12 CONDE...

Страница 3: ...8 2 SERVICE LAMPS 33 8 3 ROTARY BEACON LAMPS 33 9 MAINTENANCE SERVICING 34 9 1 GENERAL MAINTENANCE 34 9 2 INSPECTION PREVENTIVE MAINTENANCE 34 36 9 3 AIR CONDITIONING SYSTEM 37 9 4 MOISTURE IN A REFRI...

Страница 4: ...r personal injury and or property damage could happen Please understand and respect those identifications WARNING These units operate on a high voltage with moving parts at high speed which can lead t...

Страница 5: ...s as well as trolley s components and accessories The enclosure made of double skin heavy gauge G 90 zinc coated and galvanized steel by the hot dip process of lock forming quality conforming to ASTM...

Страница 6: ...the compressor compartment while the system on operation which result safety cutoff to the compressors due to the high pressure in the condenser side refer to the operation part of the manual for mor...

Страница 7: ...generator is fully self contained including all controls alarm indications and other operating parameters for the engine and generator The low emission gas generator set is comply ing with internatio...

Страница 8: ...SET AUTO MANUAL and START push button The first three push buttons feature LED selected indications Fur ther push buttons provide LCD DISPLAY SCROLL and EVENT LOG VIEW functions Microprocessor control...

Страница 9: ...8 D Alarms Shutdowns...

Страница 10: ...mps 74 MAX FUSE SIZE CIRCUIT BREAKER Amps 90 UNIT KVA Amps 54 6 CONDENSER COIL Type Inner grooved tubes and enhanced fins Tube Dia Rows Fins per inch 3 8 5 14 Total face area Sq ft 25 EVAPORATOR BLOWE...

Страница 11: ...ing Capacity 250 000 BTU hr 115 F ambient temperature Ambient Operating Temperatures 50 F to 125 F Maximum Humidity 100 Airflow 2156 cfm 100 fresh air Static pressure 20 H2 O Altitude To 6561 feet 200...

Страница 12: ...s run continu ously in the ambient temperature of 500 C 1220 F at 100 relative humidity environment Auto refrigeration system ensures defrost cycle to prevent the system icing The unit consists of the...

Страница 13: ...n as per NEC regulation The engine s control panel has the following monitoring devices a Engine hour meter gauge b Engine oil pressure gauge c Engine temperature gauge d Fuel gauge e Coolant level ga...

Страница 14: ...ssor cools it with outdoor air and then causes the refrigerant vapor to condense into a high pressure liquid It may also provide storage for liquid refrigerant in the system Expansion valve The expans...

Страница 15: ...14 SCHEMATIC REFRIGERATION DIAGRAM...

Страница 16: ...Compressors are conforming to ARI540 STD The compressors are equipped with internal motor protection factory installed crankcase heaters and rubber vibration isolators for quiet and efficient operatio...

Страница 17: ...s Compression in the scroll is created by the interaction of an orbiting spiral and a stationary spiral A refrigerant enters the outer openings as one of the spirals orbits The open passages are seale...

Страница 18: ...are statically and dynamically balanced to operate at minimum noise and vibration Fan blades are designed with appropriate pitch angle which result in maximum airflow through the condenser coil 3 3 4...

Страница 19: ...and provides a mean for checking the system refrigerant 3 3 11 Fan Cycle Head Pressure Control The capacity of air cooled condensers varies with the difference between condensing temperature and cond...

Страница 20: ...8 15 06 05 02 EVAPORATOR COIL 03 CONDENSER COIL 04 EXPANSION VALVE 05 VIBRATION ELIMINATOR 06 HGBP LINE 07 VIBRATION ELIMINATOR 08 MUFFLER 09 BALL VALVE 01 COMPRESSOR 04 07 08 09 3 4 REFRIGERATION SYS...

Страница 21: ...plied air The signals are transmitted to the microprocessor board which will then manage the operation of the compressors in the unit Cooling or compressor operation can only be able to start if the f...

Страница 22: ...ing of 3 minutes Both compressors will operate at the same time in the first 2 minutes and the last 5 minutes in each 13 minutes interval There will then be 2 compressors running for a total of 7 minu...

Страница 23: ...the device is set to show the motor speed in RPM and the drive s output in AMPS The on off command is set to be controlled through switching contacts in the main control panel of the ACU However the...

Страница 24: ...ton Used to decrease the parameter values or go back to the previous information displayed on the LCD window 2 6 ON OFF Button Used to shut off or start the system s control 7 Menu Button Used to acce...

Страница 25: ...give power to the lamps 25 Beacon Lamp Switch This switch will turn ON OFF the beacon lamp on top of the unit provided that the fuel level is more than 30 If fuel level is less than 30 then the beaco...

Страница 26: ...r details please see the more description of test operation in the generator set manual 5 Start Button This button is only active in manual or test mode Pressing this button in manual or test mode wil...

Страница 27: ...oints to ensure safe and reliable operation a Check generator engine oil level Remove engine oil dipstick and check oil level mark on it Add oil to bring it to full level mark CAUTION NEVER OPERATE TH...

Страница 28: ...The fuel tank has drains in the side of the tank Drain water and foreign material at least weekly k Remove the air conditioning duct from storage box located below the trailer and near to supply blow...

Страница 29: ...rator section and ACU circuit breaker inside the main control panel At this point the LCD display of the user interface board in the main control panel will be illuminated and the power button will be...

Страница 30: ...ll the compressors will stop and the supply fan shuts off after a pre set timing of 30 seconds b To bring the generator to stop turn the Start Control Switch in OFF position The generator engine will...

Страница 31: ...ondition is corrected g SP TR OUT OF RANGE This fault is caused by an open or shorted suction pressure transducer Compressors are stopped or will not be able to operate Number shown with the fault cor...

Страница 32: ...nal Overload Relay Contact of compressor opened c Cond Fan motor thermal contact is open CORRECTIVE MEASURE Check and Re tighten wiring connec tion Remove the clog or straighten the hose Replace Relay...

Страница 33: ...upply in the control circuit thereby cutting OFF power to the motors The voltage monitor relay will re set automatically when power is brought back to normal conditions The trip settings and other det...

Страница 34: ...or engine is not running or in stand by mode If in case the generator engine is running and the operator decides to check the fuel level the generator controls may stop the engine if the push to check...

Страница 35: ...checking C Engine oil specifications Refer to the Genset Manual for engine lubrication specifications and requirements D Fuel Refer to the Genset Manual for engine fuel specifications and requirement...

Страница 36: ...18 Inspect system for restrictions X 19 Inspect clamps for tightness X 20 Inspect for corrosion X 21 Inspect muffler for security X X X X 22 Inspect that battery electrolyte level covers plates X 23...

Страница 37: ...contact cleaner as required X 51 Check all pressures temperatures as applicable and satisfy the operation performance X 52 Ensure that the towing bar is in the vertical position and locked X 53 Ensur...

Страница 38: ...e with the Montreal Protocol venting refrigerant to the atmosphere is not permitted Never vent refriger ant from the system or Freon cylinders to atmosphere Always use a refrigerant recovery and recyc...

Страница 39: ...n the form of sludge can plug fine strainers expansion valves and capillary tubes Because it usually contains acids sludge corrodes whatever it clings to accelerating system damage Only use fresh oil...

Страница 40: ...55 118 1 066 86 28 75 31 750 614 80 29 00 25 400 491 76 29 10 22 860 442 72 29 20 20 320 393 69 29 30 17 780 344 64 29 40 15 240 295 59 29 50 12 700 246 53 29 60 10 160 196 45 29 70 7 620 147 32 29 8...

Страница 41: ...Continue evacuation until obtaining the desired vacuum reading on both gauges 6 When evacuation is complete close the valves on the manifold gauges tightly remove the line from the vacuum pump and con...

Страница 42: ...ing a refrigeration recovery system compatible with R22 pump refrigerant from the system and dispose 3 Replace drier if necessary see sight glass for moisture indication 4 Correct leak as described be...

Страница 43: ...on cylinder 5 Purge the charging line and tighten the connection 6 Check the tubing connections between the R 22 Freon cylinder and the charging valve for leaks 7 Open the valve on the Freon cylinder...

Страница 44: ...43 10 EQUIPMENT DIMENSIONAL DETAILS Model No MAC240FZ600...

Страница 45: ...44 11 MAIN CONTROL PANEL COMPONENT LAYOUT...

Страница 46: ...45 12 MAIN CONTROL PANEL COMPONENT PARTS LIST...

Страница 47: ...TAINLESS STL 3 8 DIA S S EA 8 80002994 DOOR STOP WITH PANEL MOUNTING DEVICE EA 6 80003215 SCREW 3 8 8 32TPI EA 40 80003280 SCREW 5 16 DIA 7 8 LG HEX HD 18TPI TAPTITE EA 53 80003404 SCREW 400 8 PHL TRU...

Страница 48: ...NOM EA 4 80014711 NON METALLIC LIQ TIGHT CONDUT FITTINGS NMLT 3 8 EA 4 80014713 NON METALLIC LIQ TIGHT CONDUT FITTINGS NMLT 3 4 EA 4 80014714 NON METALLIC LIQ TIGHT CONDUT FITTINGS NMLT 1 EA 4 8001710...

Страница 49: ...C EA 1 80035390 N O CONTACT BLOCK HARMONY STYLE 4 3A 240V EA 3 80035391 N C CONTACT BLOCK HARMONY STYLE 4 3A 240V EA 1 80035654 RELAY DPDT 2 FORM C 24V 50 60HZ EA 6 80035656 RELAY DPDT 2 FORM C 240V 5...

Страница 50: ...X 13 16 AR4 EA 1 80045371 LABADH ADHESIVE 7 16 X 13 16 AR5 EA 1 80045372 LABADH ADHESIVE 7 16 X 13 16 AR6 EA 1 80045373 LABADH ADHESIVE 7 16 X 13 16 AR7 EA 1 80045374 LABADH ADHESIVE 7 16 X 13 16 AR8...

Страница 51: ...SECTION EA 1 80104513 LBL FILTER SECTION EA 1 80104640 HEXAGON NUT M6 x 5mm S S DIN 934 EA 20 80104653 WASHER M6 x 6 4mm S S DIN 125 EA 20 80106000 BLOWER MOTOR 13KW 460 3 60hz TEFC ptc 3600RPM EA 1 8...

Страница 52: ...159 80107949 SPRING WASHER B 8 VZ GAL EA 19 80107950 SPRING WASHER B 10 VZ EA 8 80107951 SPRING WASHER VZ DIN 127 B 12 EA 8 80108510 HANDLE 117 GN 528 BLACK EA 1 80108521 3D HINGE RIGHT 217 9405 EA 4...

Страница 53: ...T AR9 57 AR10 24V ac TO MB CR1 1A VENT COOL 9 43 SW2 72 42 ATB 1 GEN SET START GEN RUN FAN OFF 41 40 SW1 1A 1B 460V 3 230V 5 500VA A13 TO MB A14 CR1 GEN SET CONTROL PANEL gen set 84 85 ES ES 1A ATB 1B...

Страница 54: ...0NO 18B 13NO BMR1 FMC2 18A 9NO 8NO 8NC AR3 48 FMC1 5C 4C 6C 1C 3C 2C 3B 5O 4O 4B 6O HGS2 CC2 3A 4A HGS1 2O 3O 1O CC1 BMCA 1A AR5 3B AR2 2A AR8 2A CB2A 1 HPS2 P HPS1 CB1A 1 P A12 S FAN ENABLE 71 A17 VF...

Страница 55: ...ND CONNECTION CONNECTED EARTHING ATB LVTB AUXILIARYTERMINAL BLOCK CONTROL WIRING CONTROL WIRING TERMINAL BLOCK HVTB L2 L3 L1 S1 MAIN POWER CONNECTION TERMINAL BLOCK TOGGLE SWITCH SW SELECTOR SWITCH NO...

Страница 56: ...55 16 UNIT OVERALL VIEW...

Страница 57: ...56 UNIT REAR SIDE GENERATOR SECTION...

Страница 58: ...57 OPTIONAL DOWN DISCHARGE PLENUM EXTENSION FLEXIBLE DUCT STORAGE BOX...

Страница 59: ...58 DIESEL FILLING POINT FUEL GAUGE...

Страница 60: ...59 COIL SECTION...

Страница 61: ...60 FAN MOTOR ASSEMBLY...

Страница 62: ...61 CONDENSER SECTION...

Страница 63: ...62 OPERATIONAL PANEL...

Страница 64: ...63 MAIN CONTROL BOX...

Страница 65: ...64 VFD GENERATOR...

Страница 66: ...65 GENERATOR DISPLAY PANEL...

Страница 67: ...66 GENERATOR SECTION...

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