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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

4.2 PIPING SYSTEM

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 32 to follow the refrigerating cycle and the flow of the refrigerant in
the cooling cycle.

COOLED
AIR

HOT
DISCHARGED
AIR

MOTOR

COMPRESSOR

ROOM AIR HEAT LOAD

CAPILLARY TUBE

(LIQUID REFRIGERANT)

LIQUID OUTLET

VAPOR INLET

COMPLETE LIQUID
BOIL OFF POINT

SUCTION LINE
COOL LOW PRESSURE VAPOR

LIQUID
PRESSURE
DROP

DISCHARGE

LINE

NOT HIGH PRESSURE

VAPOR

OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH

EVAPORATOR COILS

CONDENSER COILS

ROOM AIR CONDITIONER

CYCLE OF REFRIGERATION

HIGH PRESSURE VAPOR

LIQUID REFRIGERANT

LOW PRESSURE VAPOR

OIL

CONDENSER COILS

FAN

MOTOR

CAPILLARY
TUBE

TURBO FAN

EVAPORATOR
COILS

Figure 32

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Содержание ZStar ZQ05A10B

Страница 1: ...Room Air Conditioner Service and Parts Manual ZStar ZQ05 ZQ07 12 02...

Страница 2: ...HANDLING PARTS 6 2 2 1 AIR GUIDE UPPER 6 2 2 2 ORIFICE TURBO FAN AND FAN 6 2 2 3 MOTOR 7 2 2 4 AIR GUIDE 7 2 3 ELECTRICAL PARTS 7 2 3 1 OVERLOAD PROTECTOR 7 2 3 2 COMPRESSOR 8 2 3 3 CAPACITOR 8 2 3 4...

Страница 3: ...OLING TOP DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE BUILT IN ADJUSTABLE THERMOSTAT WASHABLE ONE TOUCH FILTER COMPACT SIZE 1 2 SPECIFICATIONS MODELS ITEMS COOLING CAPACITY BTU h 5 250 7 000...

Страница 4: ...he resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all position except Off of the ROTARY SWITCH 4 The value should be over 1 M CAUTION A...

Страница 5: ...ille Refer to section 2 1 1 3 Remove 9 screws that secure the cabinet to the base pan and condenser See Figure 3 4 Lift the cabinet from the unit 5 Re install by referring to the procedures above 2 1...

Страница 6: ...e Refer to Section 2 1 1 3 Remove the cabinet Refer to Section 2 1 2 4 Remove the control board Refer to Section 2 1 3 5 Remove the air guide upper Refer to Section 2 2 1 6 Remove 2 screws that secure...

Страница 7: ...r to Section 2 1 1 3 Remove the cabinet Refer to Section 2 1 2 4 Remove the control board Refer to Section 2 1 3 5 Remove the air guide upper Refer to Section 2 2 1 6 Remove the compressor turbo fan f...

Страница 8: ...K resistor across the capacitor terminals 4 Remove the screw which fastens the capacitor clamp 5 Remove all the leads of capacitor terminals 6 Re install the components by referring to the removal pr...

Страница 9: ...acles and remove the grounding screw 7 Remove a screw securing the clip with cord to the control board 8 Pull the power cord 9 Re install by referring to procedures above 2 4 REFRIGERANT CYCLE 2 4 1 C...

Страница 10: ...ll keep oil from foaming and being drawn into the vacuum pump 6 3 Operate the vacuum pump for 20 to 30 min utes until 600 micron vacuum is obtained Close valves A and B and observe vacuum gauge for a...

Страница 11: ...azing equipment pinch off tool capable of making a vapor proof seal leak detector tubing cutter hand tools to remove components and service valve B A B A B A COMPOUND GAUGE SEE INSETS BELOW CAPILLARY...

Страница 12: ...o 36 The upper and lower sash must open sufficiently to allow a clear vertical opening of 13 from the bot tom of the sash to the window stool 2 If storm window presents interference fasten a 2 wide wo...

Страница 13: ...inner sill as shown in Figure 27 2 ATTACH L BRACKET a Install the L brackets behind the inner window sill with the short side of bracket as shown Use the 2 screws TYPE A provided b The bracket helps...

Страница 14: ...m as shown in Figure 31 5 INSTALL THE SASH SEAL AND SASH LOCK a Cut the sash seal TYPE E to the window width Stuff the sash seal between the glass and the window to prevent air and insects from gettin...

Страница 15: ...dows 3 3 ELECTRICAL DATA USE OF EXTENSION CORDS Because of potential safety hazards we strongly discourage the use of an extension cord However if you wish to use an extension cord use a CSA certified...

Страница 16: ...efrigerant in the cooling cycle COOLED AIR HOT DISCHARGED AIR MOTOR COMPRESSOR ROOM AIR HEAT LOAD CAPILLARY TUBE LIQUID REFRIGERANT LIQUID OUTLET VAPOR INLET COMPLETE LIQUID BOIL OFF POINT SUCTION LIN...

Страница 17: ...Cooling Satisfactory operation with temperature difference of inlet outlet air 55 59 F 13 15 C Replacement of unit if the unit is beyond repair Check outdoor coil heat exchanger and fan operation Che...

Страница 18: ...switch setting Compressor fails only to start Defect of compressor capacitor Replacement of compressor Motor damaged Irregular motor insulation Irregular motor resistance Check of circuit breaker and...

Страница 19: ...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 n...

Страница 20: ...orrect 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...

Страница 21: ...e 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...

Страница 22: ...WITCH 2 H L M BK BR RD BL BK POWER INPUT BK BR Plain WH BL Ribbed GN GN YL RD BL YL OR BR 4 6 8 1 3 5 7 BL RD BK BR WIRING DIAGRAM SYNC M S C 3 4 Q TY PER SET 1 1 1 1 1 1 1 LOCATION NO 1 2 3 4 5 6 7 D...

Страница 23: ...and service purposes LGE Internal Use Only 6 EXPLODED VIEW Model LWC051JPAA1 152302 149410 147582B 147582A 135313 352390 135312 130410 359012 354210 349480 352380 559011 346811 554030 130910 266003 2...

Страница 24: ...ning and service purposes LGE Internal Use Only Model LWC071JPAA0 152302 149410 147582B 147582A 135313 352390 135312 130410 359012 354210 349480 352380 559011 346811 554030 130910 266003 264110 269300...

Страница 25: ...st Office Box 1540 4200 N Pan Am Expressway San Antonio Texas 78295 1540 210 357 4400 FAX 210 357 4480 FRIEDRICH AIR CONDITIONING CO Visit our web site at www friedrich com P NO 3828A20038T Use Factor...

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