LG Room Air Conditioner
Contents
1. il QU Figure 15 i Q i Figure 17 Service Manual 9 4 AIR GUIDE UPPER Disconnect the unit from the power source Remove the front grille Refer to Section 1 Remove the cabinet Refer to Section 2 Remove the control board Refer to Section 3 Remove 2 screws that secure the brace to air guide upper and shroud See Figure 18 Remove 2 screws that secure the air guide upper to air guide lower See Figure 8 7 Lift air guide upper upward Re install by referring to the procedures above 5 ORIFICE TURBO FAN AND FAN 1 Disconnect the unit from the power source KR CO 10 11 12 13 14 10 Remove the front grille Refer to Section Remove the cabinet Refer to Section 2 Remove the control board Refer to Section 3 Remove the air guide upper Refer to Section 24 Remove 2 screws that secure the base pan to con denser See Figure 19 Remove 2 screws that secures the shroud to channel of condenser Press the snap area of shroud with your thumbs This allows you to remove it from the condenser Lift the compressor upward with the evaporator and condenser See Figure 19 Remove the orifice by pushing the snap area of the air guide blower See Figure 20 Remove the clamp springs which are clamped to the boss of fan and turbo fan by hand plier See Figure 21 Pull the fan and turbo2. 22 Room Air Conditioner Replacement Parts List Replacement Parts List PART NO 2007 LOCATION N DESCRIPTION ee ET W051CA SH2 Base Assembly Single Motor AC Fan Turbo Orifice 5210A22224H ube Evaporator Damper Vent 352111 Tube Assembly Condenser In 5231AR6159M 147581 2 Louver Horizontal 554031 Condenser Assembly Bending 135510 Cover Assembly Control Case Assembly Control 146812 Assembly AC Synchronous Panel Control 268711 2 6871A10193W 6120AR2359U Service Manual 57 Replacement Parts List LOCATION P NO NO ee WO51CA LA050MG 1 61 130410 BaseAssembly Weld 3041420036N 352390 1 GuideAssembly Air 523943000306 346811 MotorAssembly AC Outdoor 4681A10016C 4681A10016P 4681A10016D 552111 TubeAssembly Capillary 52114207434 552111 AJR32996201 552101 TubeAssembly Capillary 52 5211421489 5210430018Y 399012 Turbo 5900A10005B W48602 Clamp Spring 3H02932B 504160 CompressorSet Korea 20200002 25200CBA021 2520UCBA021 2520UCAA004 567502 0ver loadProtect 6150UL050A 6750U3L011A 6750UL011A 6750UL004A 550140 Damper Compressor 5040AR4195A 5040AR4195A 5040AR4195A 5040AR4195A 394210 EvaporatorAssembly First 5421A10008C 5421A20016K 54211200161 39211 A TubeAssembly Suction 5211A10062F 521111006206 5211A10062N 352115 TubeAssembly Eva
3. Schematic Diagram Schematic Diagram MODEL W051CA LA050MG W061CA LAO60MG1 POWER INPUT 1 BK BR WH BL Plain C3 Ribbed ROTARY SWITCH GN GN YL 1 2 4 ez 5 6 2 7 8 R 8 COMP 2 OLP THERMOSTAT 7 3854AR2330A eo WIRING DIAGRAM ROCKER SWITCH REF NO DESCRIPTION amp NAME QTY 1 POWER CORD ASSY 1 2 FAN MOTOR 1 3 COMPRESSOR 1 4 ROTARY SWITCH 1 5 THERMOSTAT 1 6 CAPACITOR 1 7 OVERLOAD PROTECTOR 1 Service Manual 15 Troubleshooting Guide Troubleshooting Guide CONDENSER COILS FAN CAPILLARY TUBE MOTOR TURBO FAN EVAPORATOR COILS Following is a brief description of the important components and their function in what is called the refrigeration system Reference should be made to Figure 33 to follow the refrigerating cycle and the flow of the refrigerant in the cooling cycle ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS SUCTION LINE VAPOR INLET COMPLETE LIQUID HO BOIL OFF POINT COOL LOW PRESSURE VAPOR DISCHARGED COOLED AIR AIR ROOM AIR HEAT LOAD gt OUTSIDE COOLING AIR FOR RE
4. 20 Hoom Air Conditioner Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor cycles on overload Fan motor If not running determine the cause Replace if required Condenser air flow restriction Remove the cabinet inspect the interior surface of the condenser If restricted clean carefully with a vacuum cleaner do not damage fins or brush Clean the interior base before re assembling Condenser fins If the condenser fins are closed over a large damaged area on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test the capacitor Wiring Check the terminals If loose repair or replace Refrigeration system Check the system for a restriction Insufficient cooling Air filter If restricted clean or replace Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Blower or fan Check the set screw or clamp If loose or miss ing correct If the blower or fan is hitting scroll or barrier rearrange the air handling parts Copper tubing Remove the cabinet and carefully rearrange the tubing not to contact the cabinet compressor shroud and barrier Service Manual 21 Exploded View Exploded View gt dem Q 543 4
5. Service Manual 17 Troubleshooting Guide Fails to Start Check of circuit breaker and fuse Check of power source Check of control switch Gas leakage of feeler setting bulb of thermostat Check control switch Compressor fails only to start Fan only fails to start Improper wiring Defect of fan motor Defect of compressor Loose terminal capacitor capacitor connection Improper thermostat Drop of power voltage setting Irregular motor m Improper wiring resistance Q Irregular motor insulation Q Replacement of fan motor Regular but fails to start Replacement of compressor Capacitor check Replacement Irregular motor resistance Irregular motor insulation Locking of piston metal Replacement of compressor Motor damaged 18 Room Air Conditioner Troubleshooting Guide Room Air C NAME PLATE RATING MINIMUM MAXIMUM 115V 1090 103 5V 126 5V W051CA 061 230V 1096 207V 253V 0503 LAO60MG1 COMPLAINT CAUSE REMEDY Fan motor will not run No power Check voltage at outlet Correct if none Power supply cord Check voltage to rotary switch If none check power supply cord Replace cord if circuit is open Rotary switch Check switch continuity Refer to wiring diagram for terminal identification Replace switch if defective Wire disconnected or Conn
6. gt INDOORS Service Manual 7 Operation Operation DESIGNED FOR COOLING ONLY POWERFUL AND INCREDIBLE COOLING TOP DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE BUILT IN ADJUSTABLE THERMOSTAT WASHABLE ONE TOUCH FILTER COMPACT SIZE INSULATION RESISTANCE TEST 1 Unplug the power cord and connect a jumper between 2 pins black and white 2 The grounding conductor green or green and yellow is to be open 3 Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all positions except Off of the ROTARY SWITCH 4 The value should be over 1 MQ About the jCo ion Off Turns air conditioner off High Fan High speed fan operation without cooling Low Fan Low speed fan operation without cooling High Cool Cooling with high speed fan operation Low Cool Cooling with low speed fan operation FAN ONLY Fan operation without cooling TURBO COOL Cooling with high speed fan operation Thermostat COLDER This automatically controls the temperature of the indoor air Turn the knob so that arrow points to the larger marks for greater cooling Point the arrow to the smaller marks for more moder ate cooling i e the higher number the greater cooling WAIT THREE MINUTES BEFORE RESTARTING 8 Room Air Conditioner Disassembly Disassembly Mechanical FRONT GRILLE 1
7. website http www lgservice com LG Room Aur Conditioner SERVICE MANUAL MODEL TWC051HGAA2 AWYBLAT W051CA TWC052HGAA0 AWYBLCP LA050MG TWC061HGAA2 AWYBLAT W061CA TWC062HGAA0 AWYBLCP LA060MG1 CAUTION e BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL e ONLY FOR AUTHORIZED SERVICE PERSONNEL Air Conditioner Service Manual TABLE OF CONTENTS Safety Precalitlons M 3 DIM NSIONS mm 5 Outside DitmellsiofTes et te ed tee ec teet e teet ete 5 Product Specitleatlons adel een 6 Installation ine atem a e t a RE RE 7 Select the Best Location 7 HOW 0 uei oer a a 7 8 8 Insulation Resistance 0 8 0 8 Disassembly emot dn oie obl ce ua vq 9 Mechanical nee edt eris e diee e ERR i ORO RM awe ein 9 Air Handling iae tata atone eae losa ances 10 603 oon tee meet iin E ree em re edi doti edo 11 Refrigerating OY Gg
8. Disconnect the unit from source of power 2 Remove the two knobs by pulling them off Using a screwdriver remove the screw that secures the front grille to control board See Figure 13 3 Push the front grille up from the bottom Pull the top of the front grille away from the cabinet as the top tabs lift out of their slots See Figure 14 4 Replace the grille by placing the tabs in the slots and push the grille until it snaps into place CABINET 1 Disconnect the unit from the power source 2 Remove the front grille Refer to section 1 3 Remove 9 screws that secure the cabinet to the base pan and condenser See Figure 15 4 Lift the cabinet from the unit 5 Re install by referring to the procedures above CONTROL BOARD 1 Disconnect the unit from the power source 2 Remove the front grille Refer to Section 1 3 Remove the cabinet Refer to Section 2 4 Remove 2 screws that secure the control board to base pan and air guide See Figure 16 5 Pull the control board toward yourself Controls wires and capacitor are now accessi ble for servicing Discharge the capacitor before servicing See step 2 3 3 on page 8 for proce dures 6 Disconnect one housing terminal and 3 wires for the fan motor and compressor See Figure 17 7 Re install components by referring to procedures above Refer to wiring diagram on page 17 in this manual or inside control board Figure 14
9. 0 tga ea be len 12 Schematic 15 Wiring BITS Ir T 15 Troubleshooting Guide sss nnne tenent 16 Piping System arent te benedi Nea Mod 16 Troubleshooting eso oie optado ae airless eae 17 Room Air Conditioner Voltage eei pr poet a root i eie buds 19 Exploded 22 Replacement Parts 23 2 Hoom Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is Classified by the following indications AWARNING This symbol indicates the possibility of death or serious injury ACAUTION This symbol indicates the possibility of injury or damage to property only Meanings of symbols used in this manual as shown below 9 Be sure not to do Be sure to follow the instruction AWARNING Installation Do not use damaged power cord plugs or a Always use the power plug and socket with loose socket the ground terminal There is risk of fire or electric shock There is risk of electric shock Service Manual 3 Safety Precautions Do not modify or extend the power cord Do n
10. Disassembly 15 EVAPORATOR 16 1 2 3 1 2 3 4 5 6 Remove the cabinet Refer to Section 2 Discharge the refrigerant by using a refrigerant recovery system Remove the air guide upper Refer to Section 4 After discharging the refrigerant completely unbraze the interconnecting tube at the evapo rator connections Remove the evaporator Re install by referring to the procedures above CAPILLARY TUBE Remove the cabinet Refer to Section 2 Discharge the refrigerant by using a refrigerant recovery system Remove the air guide upper Refer to Section 4 After discharging the refrigerant completely unbraze the interconnecting tube of the capil lary tube Remove the capillary tube Re install by referring to the procedures above Replacement of the refrigeration cycle 1 When replacing the refrigerating cycle be sure to discharge the refrigerant by using a refrigerant recovery system After discharging the unit completely remove the desired components and unbraze the pinch off tubes Solder service valves into the pinch off tube ports leaving the valves open Solder the pinch off tubes with service valves After completing the above procedures the valve must be closed and left in place on the system for any subsequent procedures 6 2 Evacuate as follows 6 1 Connect the vacuum pump as illustrated in figure 31A Start the vacu
11. FRIGERANT PASS THROUGH lt MOTOR DISCHARGE gt lt LINE NOT HIGH PRESSURE COMPRESSOR VAPOR LIQUID PRESSURE DROP LIQUID OUTLET LIQUID REFRIGERANT PRESSURE VAPOR CAPILLARY TUBE ouo REFRIGERANT LOW PRESSURE VAPOR Figure 33 16 Room Air Conditioner Troubleshooting Guide Troublesho In general possible trouble is classified in two kinds The one is called Starting Failure which is caused by an electrical defect The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application Unit is running but cooling is ineffective Ineffective Cooling Check cold air Check outdoor coil Check heat load circulation for smooth heat exchanger and increase flow fan operation Dirty indoor coil Check gas leakage heat exchanger Not on separate circuit Repair gas leak Malfunction of fan Check inside gas Replacement of unit if pressure the unit is beyond repair Clogging of air filter Adjust refrigerant charge Obstruction at air outlet Remove obstruction Malfunction of compressor Check clogging in refrigera Replacement of tion circuit compressor Satisfactory operation Repair clogging in with temperature refrigeration circuit difference of inlet amp outlet air 44 50 F 7 10 C
12. Remove all the leads from the overload protector Remove the overload protector Re install the components by referring to the removal procedure above See Figure 24 and 25 Ook WP 9 COMPRESSOR 1 Remove the front grille and cabinet Refer to Section 1 2 2 Discharge the refrigerant by using a refrigerant recovery system 3 Remove the overload protector Refer to Section 8 4 After discharging the unit completely unbrace the suction and discharge pipes at the compressor con nections 5 Remove 3 nuts which fasten the compressor 6 Remove the compressor 7 Re install by referring to the removal procedure above See Figure 25 Figure 24 Figure 25 Service Manual 11 10 CAPACITOR 1 4 Remove the cabinet Refer to Section 2 2 3 Remove the control board Refer to Section 3 Discharge the capacitor by placing a 20 KQ resistor across the capacitor terminals Remove the screw which fastens the capacitor clamp 5 6 Re install the components by referring to the removal Remove all the leads of capacitor terminals procedure above See Figure 26 11 THERMOSTAT 1 4 Remove the cabinet Refer to Section 2 2 3 Remove the control board Refer to Section 3 Remove 2 screws which fasten the thermostat See Figure 27 Remove all the leads of the thermostat terminals 5 6 Re install the components by referring to the removal Remove t
13. SILL All supporting parts should be secured to firm wood masonry or metal This unit is designed for installation in standard double hung windows with actual opening widths of 22 to 36 The upper and lower sash must open sufficiently to allow a clear vertical opening of 13 from the bottom of the sash to the window stool 2 If storm window presents interference fasten a 2 wide wood strip to the inner window sill across the full width of the sill The wood strip should be thick enough to raise the height of the window sill so that the unit can be WOOD STRIP MOUNTED 1 MAX installed without interference by the storm window frame ON TOP OF INNER SILL gt See Figure 3 Top of wood strip should be approximately 3 4 higher than the storm window frame STORM WIN DOW FRAME or wood strip OUTDOORS to help con densation to drain properly to the outside INNER 3 Install a second wood strip approximately 6 long by SILL 11 2 wide and same thickness as first strip in the center of the outer sill flush against the back off the inner sill This will raise the L bracket as shown Figure 3 If the distance between STORM WINDOW FRAME and WOOD STRIP MOUNTED ON TOP OF INNER SILL is more than 1 two of wood strip are not necessary Figure 3 X OUTER SILL INDOORS OUTDOORS Figure 2 3 4 i CLEARANCE STORM WINDOW FRAME WOOD STRIP FOR L BRACKET X OUTER SILL OUTDOORS
14. SSIS COMPRESSOR OVERLOAD PROTECTOR Internal PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR 8 WIRE WITH GROUDING POWER CORD ATTACHMENT PLUG CORD CONNECTED TYPE DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER DB Dry Bulb WB Wet Bulb SPECIFICATIONS ARE SUBJECT TO MINOR CHANGE WITHOUT NOTICE FOR FURTHER IMPROVEMENT 6 Hoom Air Conditioner Installation Installation This air conditioner is designed with a button down chassis so it can be easily installed in a window 1 To prevent vibration and noise make sure the unit is installed securely and firmly 2 Install the unit where the sun does not shine directly on INSIDE OUTSIDE FENCE the unit AWNING 3 The outside of the cabinet must extend outward for at a least 10 and there should be no obstacles such as a OOLEDAIR HEAT fence or wall within 20 from the back of the cabinet because it will prevent heat radiation of the condenser Restriction of outside air will greatly reduce the cooling efficiency of the air conditioner RADIATION ABOUT 7 4 CAUTION AII side louvers of the cabinet A e Over 20 must remain exposed on the outdside of the structure 4 Install the unit slanted slightly so the back is slightly Figure 1 lower than the front about 1 4 This will force con densed water to the outside 5 Install the unit with the bottom about 30 60 above the floor level Window Requirements INNER
15. ect wire Refer to wiring diagram for connection loose terminal identification Repair or replace loose terminal Capacitor Discharge Test capacitor capacitor before testing Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hitting shroud or blower wheel hitting scroll Re align assembly Units using slinger ring condenser fans must have 0 22 0 25 inch clearance to the base If necessary shim up the bottom of the fan motor with mounting screw s Check fan motor bearings if motor shaft will not rotate replace the motor Fan motor runs Revolves on overload Check voltage See limits on this page If not within limits call an electrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Service Manual 19 Troubleshooting Guide COMPLAINT CAUSE REMEDY Fan motor noise Fan If cracked out of balance or partially missing replace it Blower If cracked out of balance or partially missing replace it Loose set screw Tighten it Worn bearings If knocking sounds continue when running or loose replace the motor If the motor hums or noise appears to be internal while running replace motor Compressor will not run Voltage Check voltage See the limits
16. fan outward Remove the shroud Re install by referring to the procedures above Room Air Conditioner Figure 21 Disassembly Disassembly 6 MOTOR Disconnect the unit from the power source Remove the front grille Refer to Section 1 Remove the cabinet Refer to Section 2 Remove the control board Refer to Section 3 Remove the air guide upper Refer to Section 4 Remove the compressor turbo fan fan and shroud Refer to Section 5 7 Remove 2 screws that secure the motor to the motor See Figure 22 8 Remove the motor 9 Re install by referring to the procedures above 5 7 AIR GUIDE Disconnect the unit from the power source Remove the front grille Refer to Section 1 Remove the cabinet Refer to Section 2 Remove the control board Refer to Section 3 Remove the air guide upper Refer to Section 4 Remove the compressor turbo fan fan and shroud Refer to Section 5 7 Remove the motor Refer to Section 6 8 Remove 2 screws that secure the air guide to the base pan See Figure 23 9 Push the air guide backward and lift it upward See Figure 23 10 Re install by referring to the procedures above 5 gt 8 OVERLOAD PROTECTOR 1 Remove the front grille and cabinet Refer to Section 1 2 Remove the nut which fastens the terminal cover Remove the terminal cover
17. he thermostat procedure above 12 ROTARY SWITCH 1 4 Remove the cabinet Refer to Section 2 2 3 Remove the control board Refer to Section 3 Remove 2 screws which fasten the rotary switch See Figure 28 Remove all the leads of the rotary switch terminals 5 6 Re install the components by referring to the removal Remove the rotary switch procedure above 13 POWER CORD 1 Disconnect the unit from source of power 2 Remove the front grille Refer to Section 1 3 4 Remove a screw that secures control board to base pan Remove the cabinet Refer to Section 2 and air guide Refer to Section 3 Pulls the control board toward you Disconnect the 2 receptacles and remove the grounding Screw Remove a screw securing the clip with cord to the con trol board See Figure 29 Pull the power cord Re install by referring to procedures above 14 CONDENSER 1 2 3 4 5 6 Remove the cabinet Refer to Section 2 Discharge the refrigerant by using a refrigerant recovery system Remove 2 screws which fasten the condenser See Figure 30 After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections Remove the condenser Re install by referring to the procedures above 12 Hoom Air Conditioner Disassembly Figure 26 Figure 28 Figure 29 Figure 30 Dy SH
18. ill closed If more charge is required the high side will not take it Close valve A With the unit running open valve B and add the balance of the charge a Do not add the liquid refrigerant to the low side b Watch the low side gauge allow pressure to rise to 30 Ibs 0 2MP Turn off valve B and allow the pressure to drop d Repeat steps B and C until the balance of the charge is in the system When the unit is operating correctly use the pinch off tool with the unit still running and the clamp on the pinch off tube Using a tube cut ter cut the pinch off tube about 2 inches from the pinch off tool Use sil fos solder and solder the pinch off tube closed Turn off the unit allow setting for a while and then test the leak age of the pinch off connection Service Manual 13 Disassembly Equipment needed Vacuum pump charging cylinder manifold gauge brazing equipment pinch off tool capable of making a vapor proof seal leak detector tubing cutter hand tools to remove components and service valve COMPOUND GAUGE 00 MANIFOLD GAUGE CONDENSER HIGH PRESSURE SIDE SEE INSETS BELOW CAF COMPRESSOR EVAPORATOR LOW PRESSURE SIDE CAPILLARY TUBE LO HI CHARGING CYLINDER fT O C EXTERNAL VACUUM PUMP C Figure 31A Pulling Vacuum Figure 31B Charging 14 Hoom Air Conditioner
19. on the preceding fan motor runs page If not within limits call an electrician Wiring Check the wire connections if loose repair or replace the terminal If the wires are discon nected refer to wiring diagram for identification and replace the wires Check the wire connections If not according to the wiring diagram correct the connections Rotary Check for continuity refer to the wiring diagram for terminal identification Replace the switch if the circuit is open Thermostat Check the position of knob If not at the coldest setting advance the knob to this setting and restart the unit Check the continuity of the thermostat Replace the thermostat if the circuit is open Capacitor discharge Check the capacitor capacitor before Replace if not within 10 of manufacturer s servicing rating replace if shorted open or damaged Compressor Check the compressor for open circuit or ground If open or grounded replace the compressor Overload Check the compressor overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest Compressor cycles on Voltage Check the voltage See the limits on the overload preceding page If voltage is not within these limits call an electrician Overload Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest
20. ot install remove or re install the unit by yourself There is risk or fire or electric shock There is risk of fire electric shock explosion or injury Be cautious when unpacking and installing Do not store or use flammable gas or com the product bustibles near the air conditioner Sharp edges could cause injury Be especially careful There is risk of fire or failure of product of the case edges and the fins on the condenser and evaporator Be sure the installation area does not deterio rate with age If the base collapses the air conditioner could fall with it causing property damage product failure and per sonal injury 4 Hoom Air Conditioner Dimensions Dimensions A This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the A air conditioner This symbol indicates special notes Model All Model Dimension W mm inch 472 18 7 6 H mm inch 312 12 4 D mm inch 370 14 6 Service Manual 5 Product Specifications Product Specifications 051 061 LAO50MG 1 PROPELLER FAN WITH SLINGER RING OPERATION CONTROL ROTARY SWITCH ROOM TEMP CONTROL THERMOSTAT AIR DIRECTION CONTROL 2WAY RIGHT amp LEFT CONSTRUCTION TOP DOWN CHA
21. porator In 5211A10063A 5211A10063C 5211A10063E 149980 Shroud 4998AR1608A 49984 100254 529010 FanAssembly Axial 5901420011B 554030 CondenserAssembly First 5403AR6200K 5403420038 349480 Orifice 10484100168 392390 2 Guide Air 52384200138 5238420013 249950 CaseAssembly Control 4995AR6202P 4995421015C 4995AR6202P 135500 Cover 32204200268 266003 Switch Rotary 2H00154H 269310 ThermostatAssembly 2H01109X WOCZZ Capacitor Film Box 0 77 20005 QCZZA200154 0CZZA20005B 264110 PowerCord 2H00677P 29006776 2H00677P 135312 GrilleAssembly Front 3521A10130C 3521A10130P 3521A10130C 135313 6rilleAssembly Inlet 3530AR1616A 159900 2 Louver Vertical 5990AR3190A 5990AR3190C 5990AR3190A 159900 1 Louver Vertical 5990AR3190B 39904531900 5990AR3190B 152302 Filter Air 523 1AR2148A 149410 KnobAssembl y 4941AR7315A 130910 CabinetAssembly Single 3091AR6055Y Service Manual 23 April 2005 P No 3828A28007D Printed in China
22. um pump Slowly open manifold valves A and B with two full turns counter clockwise and leave the valves closed The vacuum pump is now pulling through valves A and B up to valve C by means of manifold and the entire system CAUTION If high vacuum equip ment is used just crack valves A and B for a few minutes then open 6 3 6 4 6 5 slowly with the two full turns counter clockwise This will keep oil from foaming and being drawn into the vacuum pump Operate the vacuum pump for 20 to 30 minutes until 600 micron vacuum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pressure would indicate a possible leak or moisture remaining in the system With valves A and B closed stop the vacuum pump Remove the hose from the vacuum pump and place it on the charging cylinder See figure 20B Open valve C Discharge the line at the manifold connection The system is now ready for final charging 7 Recharge as follows 7 1 Rotary compressor systems are charged from 7 2 7 3 7 4 7 5 7 6 the high side If the total charge cannot be put in the high side the balance will be put in the suction line through the access valve which is installed as the system is opened Connect the charging cylinder as shown in fig ure 31B With valve C open discharge the hose at the manifold connection Open valve A and allow the proper charge to enter the system Valve B is st
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