LG LP091CEM-Y8 User's Manual
Contents
1. Copyright 2008 LG Electronics Inc All right reserved 47 Only for training and service purposes P NO MFL42137113 JANUARY 20082. Defect of fan motor o Loose terminal connection capacitor Improper wiring Irregular motor resistance Q Irregular motor insulation Q Y Replacement of fan motor Irregular motor resistance Y Irregular motor insulation Replacement of compressor Motor damaged Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 40 Regular but fails to start Replacement of compressor locking of rotor metal LGE Internal Use Only 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 connection loose Connect wire Refer to wiring diagram for terminal identification Repair or replace loose terminal Capacitor Discharge capacitor before testing Test capacitor Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hitting shroud or cross flow fan hitting scroll Realign assembly Units using slinger
3. shown the picture from the center of the grille prior to installing the chassis into the sleeve Note Be sure to keep a firm grip on wire handle and grille to prevent it from dropping and or causing possible injury or property damage Architectural Grille 1 Remove the cardboard sleeve stiffener and the rear enclosure of the sleeve as described in Step 1 of the stamped aluminum grille instructions 2 Turn the grille so it can be removed through the rear sleeve opening 3 Install the grille by aligning the four screws supplied to their corresonding holes in the architectural grille 28 LGE Internal Use Only 4 Secure the grille to the sleeve by tightening the four screws to their corresponding holes in the grille 5 Remove the wire handle after the installation is complete Note The stamped aluminum grille includes 6 screws washers nuts and plastic grommets The architectural grille includes 4 screws Condensate Drain kit Part No AYDR101 Description Condensate water will drain from the chassis into the sleeve during normal heat pump operation This can also occur during times of high humidity when in cooling operation Install either the outdoor or indoor drain kit components to control the condensate water where normal drainage from the wall sleeve is not possible or undesirable See Figure 35 for all components of the drain kit N WARNING Hazardous Voltage Disconnect all electri
4. 41 8 92 2 Tool Code Chassis YA Features Note O Applied No relation For circuit breaker rating please confirm to local standards wherever necessary Temperature Control Thermistor Energy Saver Mode Prefilter washable anti fungus Plasma Filter Steps Fan Cool Heat 2 2 2 Airflow Direction Control up amp down Airflow Direction Control left amp right Manual Remote Controller Type Setting Temperature Range Cooling Heating 54 F 86 F 12 2 C 30 C Auto Operation Micom Control Panel Touch Type Timer Manual controls Air Discharge Rear Air Ventilation Defrost Control Hot Start Look L Look Cabinet Type Chassis Type Slide In Out Special Function 3 Some of functions are slightly different depending upon models K The specification may be subject to change without prior notice for purpose of improvement Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Electric Heater LGE Internal Use Only 1 2 FEATURES AND BENEFITS The PTAC has many features some of which are different than those found on conventional PTAC units The servicer must be familiar with these features in order to properly service the unit THE SLEEVE AND THE REAR GRILLE Available as an option VERTICAL AIR DEFLECTOR SLEEVE ASSE
5. Concentric A Knockouts In Bottom Top View Ground Receptacle Provided Inside subbase 3 1 16 Accessory 13 7 8 352mm 78mm 205 16 515 5 mm IM E Y SES H oof i 2 50 mm Max Screw Location 2 5 8 67 mm Concentric Knockouts In Rear Front View Adjustment Figure 60 Wiring Diagram Field Wiring Q Line Voltage Q 5 TB3 TB1 o 1 L2 12 BIK j RED NEMA 6 20R i NEMA 7 20R Receptacle Receptacle Q 9 2 Field Wiring NEMA 6 30R NEMA 7 30R Line Voltage Receptacle Receptacle 230 208 VAC Field Schematic 265 VAC Field Schematic Figure 61 NEMA Plug Configurations Voltage Unit Plug Subbase Receptacle 230 208 NEMA6 15AMP NEMA6 20AMP S 5 S 265 NEMA7 20AMP NEMA7 20AMP S 5 S 230 208 NEMA6 20AMP NEMA6 20AMP 265 NEMA7 20AMP NEMA7 20AMP S Gs EGA 5 230 208 NEMA6 30AMP NEMA6 30AMP S 5 5 G9 S 265 NEMA7 30AMP NEMA7 30AMP S 69 S 37 LGE Internal Use Only 5 1 OUTSIDE DIMENSIONS 1 066mm 42 505mm 20 406mm 16 5 2 PIPING SYSTEM Following is a brief description of the important components and their functions in the refrigeration sy
6. The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system If high vacuum equipment is used just crack valves A and B for a few minutes then open slowly with the two full turns counterclockwise This will keep oil from foaming and being drawn into the vacuum pump 3 Operate the vacuum pump for 20 to 30 minutes until 600 microns of vacuum are obtained Close valves A and B and observe the 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 4 Remove the hose from the vacuum pump and place it on the charging cylinder See Figure 21 B Open valve C Discharge the line at the manifold connection 5 The system is now ready for final charging 15 6 Recharge as follows 1 Refrigeration cycle systems are charged from 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 you installed as the system was opened 2 Connect the charging cylinder as shown in Figure 21 B With valve C open discharge the hose at the manifold connection 3 Open valve A and allow the proper charge to enter the system Valve B is still closed 4 If more charge is required the high side will not take it Close valve A 5 With the unit running open valve B and add th
7. This kit provides an attractive replacement escutcheon see Figure 53 The kit allows the removal of control knobs and graphics which are not required when a wall thermostat is used to control the unit Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Figure 53 Standard Escutcheon TEMPERATURE OPERATION WARMER COOLER Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ROM A REMOTE LOCATION FRO UNIT IS CONTROLLED F Figure 54 1 Grasp the cabinet front as shown in Figure 54 2 Pull the bottom of the cabinet front away from the chassis until the retaining clips disengage
8. or programmable A remote thermostat can also be added to any installed unit Zone Sensor Occupants enjoy ultimate comfort with consistent climate control Attach an optional inexpensive remote Zone Sensor to exactly match the functions of the PTAC without disabling any features Copyright 2008 LG Electronics Inc All right reserved 4 Only for training and service purposes LGE Internal Use Only 1 3 CONTROL LOCATIONS OPERATION TEMPERATURE OPERATION COOLING ONLY MODEL OPERATION MODE SELECTOR OFF Turns air conditioner off LOW FAN Low speed fan operation without cooling HIGH FAN High speed fan operation without cooling LOW COOL Cooling with the low speed fan operation 1 WARMER COOLER ELECTRIC HEATING MODEL HIGH COOL Cooling with the high speed fan operation LOW HEAT Heating with the low speed fan operation TEMPERATURE CONTROL HIGH HEAT Heating with the high speed fan operation Set the Thermostat control to the desired temperature mark 5 the mid point is a good starting position If the room temperature is not satisfactory after a reasonable time adjust the control to a cooler or warmer setting as appropriate VENTILATION The ventilation lever is located to the lower left side of the unit The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions When fresh air is necessary in the room set the ventilation lever to the OPEN position The damper is opened
9. reverse order of disassembly NOTE All tube should be inserted into rubber elbows by at least 1 2 inch relay of the terminal of the board as shown in fig 40 Make sure to fasten the pump wire through the wire clip on the back side of the control barrier as shown in fig 39 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 27 Figure 39 LGE Internal Use Only Architecture Grille Aluminum Single Pack Part No AYAGALAO 1 Stamped Aluminum Grille WM mmm i i I EE Architecture Grille Description Outdoor grilles are attached to the wall sleeve and exposed to the exterior wall The grilles are an industry standard size of 42 x 16 Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power bef
10. 7 Only for training and service purposes Note The following figures show wiring schematics for heat pump and straight cool units with electric heat respectively Wiring Schematic for Remote Heat Pump 2 o s m o GL CONTROL BOARD CONNECTIONS THERMOSTAT CONNECTIONS Wiring Schematic for Straight Cool Unit en o w 2 s CONTROL BOARD CONNECTIONS THERMOSTAT CONNECTIONS jJ LGE Internal Use Only Before the following disassembly POWER SWITCH is set to OFF and disconnected the power cord 2 1 MECHANICAL PARTS 2 1 1 FRONT GRILLE 1 Remove the front grille See Figure 1 2 To remove the front grille pull out the bottom of the front grille and then lift up Re install the component by referring to the removal procedure 3 To replace the front grille place the tabs over the top of the unit and push the bottom of front grille until the clips snap into place This Room Air Conditioner PTAC discharges air from the top of the unit through reversible 2 position discharge grille louvers The unit is shipped from the factory with the discharge grille louvers at an angle of 40 off vertical In the alternate position the louvers will be at an angle of 15 off vertical To adjust air direction remove the front grille Remove the 4 screws that fasten the discharge grille to the front grille Flip the discharge grille 180 then reattach the discharg
11. aS gt 2 02 GE lt 5 net steel brace 4 Remove the top cover assembly See Figure 6 guide 5 Remove the 6 screws which fasten the Air 6 Pull the Air guide assembly out from the unit See Figure 7 7 Remove the 2 screws which fasten the electric heater in the left hand side 8 Pull the electric heater towards left for a while and then lift up vertically to disassemble it completely from Air guide LGE Internal Use Only 10 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 2 2 2 CROSS FLOW FAN 1 Remove the front grille Refer to section 2 1 1 2 Remove the control box assembly Refer to section 2 1 2 3 Remove the Air Guide Assembly from the unit Refer to section 2 2 1 4 Loosen the screw on the cross flow fan See Figure 9 5 Remove the 4 screws which fasten the indoor motor and the earth wire See Figure 10 6 Remove the supports on both sides 7 Pull the cross flow fan out from the air guide 8 Re install the components by referring to the removal procedure 2 2 3 AXIAL FAN 1 Remove the brace 2 Remove the 4 screws which fasten the condenser with the shroud and the basepan See Figure 11 3 Remove the condenser sideways carefully 4 Remove the clamp which secures the fan with pliers See Figure 12 5 Remove the axial fan 6 Re install th
12. as in Figure 55 3 Lift the cabinet front off the chassis 4 Lifting the front edge of the escutcheon slide the tabs at the top of the escutcheon out of the retaining holes and remove the escutcheon See Figure 56 Figure 55 35 LGE Internal Use Only 5 Replace the escutcheon with the one from this kit by inserting the tabs at the top of the escutcheon into the retaining holes and laying the escutcheon flat on the control panel Replace the front by reversing steps 1 through 4 Store the control knobs and escutcheon just removed from the unit for possible reinstallation if the wall thermostat is no longer desired N Figure 56 Escutcheon Subbase Part No AYSB1101 230 208V 20 AYSB2101 230 208V 30A 11 Description The subbase may be installed on the wall sleeve before or after installing the wall sleeve The subbase is prewired Electrical connections can be made on the left side after the access cover is removed A grounding screw is provided Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Installation The installation a
13. assembly is available for use with the hard wire junction box or subbase The switch provides a POWER ON OFF function at the unit as required by some electrical codes A replacement junction box cover plate is provided with each switch kit For additional information refer to the Power Switch Installation Instructions Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt Unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of this equipment should performed by qualified experienced technicians Junction Box Kit Installation and Wiring Procedure Electrical connections at the unit must be made after the unit chassis is installed in the wall sleeve The installer must determine and supply the mounting components for attaching the junction box to the wall or door Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all
14. available ENERGY SAVER The energy saver switch 2 is on This switch is set at continuous fan to provide continuous fan operation in cool or heat modes When the switch is off the continuous fan allows continuous circulation of room air and make the more balanced temperature of the room When the switch is on the fan is on or off with the compressor or with the heater FRONT DESK CONTROL When the pair wire is connected to the connector LOand LI the unit can be turned ON or OFF with a switch located at the Front Desk Control panel When the front desk switch is ON the fan operate according to the condition of setting without working compressor and heater When the front desk switch is OFF the unit can operate according to the setting of controls Wire AWG Maximum Length 22 600ft 180m 20 900ft 270m 18 1500ft 450m 16 2000ft 610m LO LI GL GHO W Y C Front Desk Switch REMOTE WALL THERMOSTAT When the wires are connected the unit will be controlled by a remote wall thermostat The thermostat connections supply the 24 Volt AC When you install the digital electronic thermostat you must set it to the 24 Volt AC See the installation Instruction in this manual for the Remote Wall Thermostat 24 Volt N LO LI GL GH O W Y R C Molex Housing Spec 396 09V Copyright 2008 LG Electronics Inc All right reserved
15. compressor temperature is high remove the overload cool and retest 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 reassembling Condenser fins If condenser fins are closed over a large area damaged on the coil surface head pressures will increase causing the compressor to cycle Straighten the fins or replace the coil Capacitor Test capacitor Wiring Check the terminals If loose repair or replace Refrigerating system Check the system for restriction Insufficient cooling or heating Air filter If restricted clean of replace Exhaust damper door Close if open Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Cross flow fan Check the set screw or clamp If loose or missing correct If the blower or fan is hitting air guide rearrange the air handling parts Copper tubing Carefully rearrange tubing not to contact compressor shroud and barrier Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 43 LGE Internal Use Only 6 Piping q CAPI
16. electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment damage Important Note All wiring must comply with applicable local and national codes Types and location of disconnect switches must comply with all applicable codes 1 Remove the cover plate from the junction box 2 Mount the junction box to the wall or floor within 28 inches 711 mm of the lower right corner of the wall sleeve If a disconnect switch is to be used make electrical connections to it and mount the switch in the junction box Refer to the Power Switch Installation Instructions Remove control panel assembly by removing the two screws holding control panel in place Rotate the panel forward Disconnect the power cord leads from all electrical connections including the ground wire Remove the power cord clamp and the power cord from the unit For 208 230 volt units remove and discard the white lead from the wire assembly For 265 volt units remove and discard the red lead from the wire assembly Remove the retaining ring from the threaded portion of the straight conduit clamp Insert the three wires into the metal box through one of the two openings in the box Replace the hole cover grommet into the unused hole to prevent objects from entering the box Replace the retaining ring back on the conduit clam
17. knobs 3 Remove the 2 screws which fasten P C B cover 4 Disconnect all the leads which connected to the P C B 5 Remove the two screws which fasten the P C B board 6 Re install the components by referring to the removal procedure above Figure 18 Copyright 2008 LG Electronics Inc All right reserved 13 Only for training and service purposes BOE dnteinal Use Only 2 4 REFRIGERATION CYCLE Discharge the refrigerant system using a refrigerant recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the refrigerant Leave the valve in place after servicing the system 2 4 1 CONDENSER 1 2 Remove the brace and the shroud Refer to section 2 2 2 Remove the 4 screws which fasten the shroud Refer to section 2 2 2 Push forward the shroud and remove the 2 screws which fasten the condenser with the basepan After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections Remove the condenser Re install the components by referring to notes See Figure 19 2 4 2 EVAPORATOR 1 2 Remove the front grille Refer to section 2 1 1 Discharge the refrigerant completely 3 Remove the control box assembly Refer to section 2 1 2 Remove the 4 screws which fasten the evaporator at the left side and the right side Move the evaporator sideward car
18. ring condenser fans must have 1 4 to 5 16 inch clearance to the base If it is hitting the base 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 intermittently 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 Fan motor noise Grommets Check grommets if worn or missing replace them Fan If cracked out of balance or partially missing replace it Turbo fan 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 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 41 LGE Internal Use Only COMPLAINT CAUSE REMEDY Compressor will not run but fan motor runs Voltage Check voltage See the limits on the preceding page If not within limits call an electrician Wiring Check the wire connections if loose repair or replace the terminal If wires
19. the wire assembly 2 Connect the black lead to the center terminal of the fuse holder Connect the white lead to the common C terminal on the capacitor Co A Connect the ground wire to the partition panel where the ground wire on the power cord was located Use the supplied green ground screw Connect the white lead of the wire assembly at the junction box to the white lead of the field power source Connect the black lead of the wire assembly at the junction box to the black lead of the field power source N Connect the ground wire of the field power supply to the bare ground wire of the wire assembly at the junction box Install the junction box cover plate co Reinstall the control panel assembly Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Figure 50 Mounting Hard Wire Junction Box Kit Wall Sleeve Ground Wie with Eyelet Terminal Cover plate 28 Inch Max Y Power Leads e RM with Push on x M Connectors Conduit Metal Box with Straight Clamp Figure 51 Metal Box Location Control Panel Base Pan Bracket Figure 52 Electrical Wiring Routing Right Side of Chassis Wire Tie 3 16 Inch Diamenter Hole Electrical Supply Wires Back of Control Panel a 34 LGE Internal Use Only Remote Escutcheon Kit Part No AYRE110 Description
20. used Contact your sales representative when considering the use of a commercial algaecide See Figure 41 for components of the drain kit 29 LGE Internal Use Only Figure 42 Outdoor Drain Kit Installation DRAIN FITTING BLANK OFF PLATE PLATE 1 2 DRAIN POTTING GASKETS A MTG SCREWS Outdoor Drain Kit Installation Before installing the wall sleeve louvered condenser grille it must be determined if the optional outdoor wall sleeve drain kit is to be installed The drain kit will allow the condensate from the outdoor and indoor coils to be routed to a suitable area The drain kit can be installed so the condensate can be drained from the right or left hand side of the wall sleeve See Figure 42 See local codes for proper condensate disposal To install the outdoor drain components proceed as follows Remove the rear enclosure panel and the sleeve stiffener These items may be removed from the inside of the building no The drain fitting can be installed on the left or right hand side of the sleeve Illustration will be for a right hand installation Insert the drain fitting in the opening of gasket A and hole of plate B Secure this assembly to the rear of the sleeve with two sheet metal screws into holes G provided in sleeve See Figures 43 and 44 Locate the other gasket A on the back of blank off plate C and secure the assembly to the left rear of wall sleeve with sheet metal scre
21. with the NEC and local codes local regulations FUSE Use a time delay fuse or circuit breaker Refer to the nameplate Large Tandem for proper power supply requirements 30 A 230 208 volt receptacle configuration 3 3 2 ELECTRICAL SAFETY IMPORTANT GROUNDING INSTRUCTIONS The air conditioner has a three prong grounding plug on its power supply cord which must be plugged into properly grounded three prong wall receptacle for your protection against possible shock hazard FUSE Use a time delay fuse or circuit breaker Refer to the nameplate for proper power supply requirements 208 230 and 208 230 VOLT UNITS These units are equipped with a three prong grounding plug on the power supply cord which must be plugged into a matching properly grounded three prong wall receptacle for your protection against possible shock hazard If such an outlet is not present one must be installed by a qualified electrician in accordance with the National Electrical Code and local codes and ordinances NOTE DO NOT USE AN EXTENSION CORD on 208 230 and 208 230 Volt units Copyright 2008 LG Electronics Inc All right reserved 23 Only for training and service purposes LGE Internal Use Only Note The installation and servicing of this equipment must be performed by qualified experienced technicians NOTICE Warnings and Cautions appear at appropriate sections throughout this manual Read these carefully N WARNING Indicates a potentially ha
22. A 263230A Thermistor for Indoor Air Temperature Housing color blue 263230B Thermistor for Evaporator Pipe Temperature Housing color white Note Please ensure GCSC since the replacement parts may be changed depending upon the buyer s request Please check the correct parts in View RPL Replacement Part List on GCSC GCSC Website http biz lgservice com Copyright 2008 LG Electronics Inc All right reserved 46 Only for training and service purposes LGE Intemal Use Only CONDENSER OUTDOOR SERVICE REPLACEMENT PROCEDURE In this Model Aluminum Condenser is applied In case you need to replace the condenser follow the below mentioned steps 1 Cover the brazing point Section A between copper pipe and aluminum pipe with wet towel 2 Remove the copper pipe and copper connector of aluminum condenser Section B by brazing and replace the condenser with a new one 3 Make sure that the direction of brazing flame is away from the aluminum condenser Follow the above procedure for assembling or disassembling the aluminum condenser Copper pipe Aluminum pipe Cover the brazing point Brazing point in gt gt with wet towel assembling or disassembling Y section
23. LL8 VH 4V E L LLavH s 19111 13318 INVI 18S p109 NOLLVTIVLSNI H33N3A ANY 3l A Vu AIS Q3T1IV13G NOLLO3S TIVM LGE Internal Use Only 21 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 3 2 3 UNIT INSTALLATION 1 Remove the shipping screw from the ventilation door See Figure 24 2 Remove the front gille by pulling it out at the bottom to release it then lift it up along the unit top front See Figure 25 3 Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes See Figure 26 4 Reinstall the front grille by hooking the top over the unit top then pushing it in at the bottom See Figure 27 Copyright 2008 LG Electronics Inc All right reserved 22 Only for training and service purposes Figure 25 Figure 27 LGE Internal Use Only 3 3 ELECTRICAL REQUIREMENTS 3 3 1 ELECTRICAL DATA FOR 230 208V MODEL N CAUTION 1 Do not use an extension cord with this unit Tandem 2 When the unit is in the OFF position the power supply to the 15A electrical controls is still energized 3 Disconnect the power to the unit before servicing the unit 4 Remove the power cord from the wall receptacle 5 Remove or turn off the protective device fuses or circuit breaker Perpendicular 20A Wirings including installation of the receptacle must comply
24. LLARY TUBE THO HEAT HEAT EXCHANGER EXCHANGER EVAPORATOR CONDENSER COMPRESSOR LOC Description PCB Connector Thi Thermistor for indoor Air temperature CN IDAT Th2 Thermistor for Evaporator pipe temperature CN IDPT Copyright 2008 LG Electronics Inc All right reserved 44 Only for training and service purposes LGE Internal Use Only 7 Schematic Diagram a POWER INPUT In part A there are 3 types HEATER ASSY THERMISTOR pan lL2 2 yp BL WF 8 22222222222 2 HEATER FUSE BIMETAL ae wy E 2 FOR E HEATER MODEL SOLENOID OR L LOR 2 3 3 OUTDOOR 4 l 4 j mor 2 FAN i RD sel MOTOR 3 2 3 ward We et E EODD 1 Peers on OUTDOOR AIR 2248 _ o 1 THERMISTOR OUTDOOR PIPE l1 4 THERMISTOR T INDOOR li li MENEE ue PRAE CN EXT2 CN TRANS INDOOR AIR PEVAS 000000000 Q LLLLLLLLL DL B GN PPN k REMOTE THERMOSTAT EXTERNAL TRANS CN COMP CN N L CN EXT ee 1 adu CN EXT L pe a iac 7 00 99 X 246 7 T S V4 CN ODF RY HEAT2 RY HEAT1 Copyright 2008 LG Electronics Inc All right reserved 45 Only for training and service purposes LGE Intemal Use Only Mis r ER
25. MBLY REAR GRILLE Horizontal Louver Including Aluminum Rear Grille Aluminum Rear Grille AIR FILTER INLET GRILLE Air Intake EXPANDED METAL GRILLE Superior for a performance IIR Infinite Impulse Response The IIR function senses the temperature several times per second and makes micro adjustments several times per Compressor Restart Delay This feature extends the overall life of compressor by preventing the short cycling of the air conditioner When the compressor restarts LG PTAC is designed to give a minimum of three minutes to have a time of equalizing the refrigerant pressures for optimizing cycling Fan Only Setting High Low The fan can run at HIGH or LOW speed without COOLING or HEATING to provide air circulation and ventilation Indoor Fan Speed Selections High Low The fan can run at HIGH or LOW speed for either COOLING or HEATING Two Fan motors The unit has two fan motors to provide quiet operation and maximum efficiency LED Diagnostics All units have this feature indicating the problem when the unit is not operating properly with easy to read diagnostics For example 1 blink every 2 seconds indicates compressor failure Copyright 2008 LG Electronics Inc All right reserved 3 Only for training and service purposes LGE Internal Use Only Indoor Filters The unit uses two indoor filters which slide in and cut easily The filters may be cleaned by washing and brushing
26. and outdoor air is drawn into the room This will reduce the cooling or heating efficiency Ch VENT CLOSE OPEN When the air conditioner has performed a cooling or heating operation and is turned off or set to the fan position wait at least 3 minutes before resetting to the cooling operation A slight heat odor may come from the unit when first switching to HEAT after the cooling season is over This odor caused by fine dust particles on the heater will disappear quickly This is harmless Copyright 2008 LG Electronics Inc All right reserved 5 Only for training and service purposes LGE Intemal Use Only 1 4 ADDITIONAL CONTROLS REMOVING THE FRONT GRILLE Additional controls are available after removing the front grille and option cover of control box To remove the front grille pull out the bottom of front grille and then lift up To replace the front grille place the tabs over the top of the unit and push the bottom of front grille until the clips snap into place ADDITIONAL CONTROLS The additional controls are located behind the option cover of control box The standard settings will be in the OFF position The authorized service man has to check switches and ensure the switches are in the desired position REMOTE ON ON ON ON ON OFF LOCAL OFF rd m Ore Renee cde Energy Saver Temperature Limit 1 Temperature Limit 2 Temperature Li
27. are off refer to wiring diagram for identification and replace Check wire locations If not per wiring diagram correct Rotary Check for continuity refer to the wiring diagram for terminal identification Replace the switch if circuit is open Thermistor Check the position of knob If not at the coldest setting advance the knob to this setting and restart unit Check continuity of the thermistor Replace thermistor if circuit is open Capacitor Discharge capacitor before Check the capacitor Replace if not within 10 of manufacturers servicing rating Replace if shorted open or damaged C Check the compressor for open circuit or ground If open or grounded replace the compressor heck th i Overload Check the compressor overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool it and retest ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 208 230V 187V 253V Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 42 LGE Internal Use Only COMPLAINT CAUSE REMEDY Compressor cycles on overload Voltage Check the voltage See the limits on the preced ing page If not within limits call an electrician Overload Check overload if externally mounted Replace if open If the
28. c power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt The product must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians Figure 41 Components of Drain Kits DRAIN FITTING BLANK OFF BLANK OFF PLATEB PLATEC PLATEC b GASKETS A 1 2 DRAIN FITTING MTG SCREWS MTG SCREWS BLANK OFF GASKET E FOR PLATE D PLATE D Drain Installation Note The optional drain kit serves only as a link between the unit and field supplied condensate drain system Installing the kit without connecting it to a drainage system will result in inadequate condensate removal possible leakage and corrosion Algaecide Some algaecide products may cause damage to the unit basepan and therefore should not be
29. d interfere with air discharge and placement of furniture may have an impact on the performance of the unit The following information is intended to minimize installation problems and assure you of trouble free installation Refer to page 17 for required wall opening dimensions Minimum recommended interior and exterior case projection for standard wall thicknesses are shown in the drawings in this manual The case may be installed flush with the finished indoor wall Mounting an outdoor grille or louver section to the building face may cause a space between the outdoor coil and the louver section Air splitters aligned with the ends of the outdoor coil must be installed between the outdoor coil inlet and outlet air streams Gaps between the outdoor coil and the louver section may allow condenser air recirculation and affect the operation of the unit The wall case should be level from side to side and from level to 1 4 bubble tilt to the outdoors The condensate disposal system in the unit is designed to dissipate the condensate water generated during cooling operation in accordance with ARI standards and actually uses this water for maximum unit efficiency A level unit will also insure proper performance of the Internal Condensate Removal ICR system optional on heat pump units Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes For new construction early planning with the arch
30. drill holes the outside wall from each corner of the inside cutout Studding that interferes with the opening must be removed and a suitable frame constructed to secure the wall case and provide adequate support for case and chassis Preparation of the Wall Case for All Types of Construction As shipped the LG wall sleeve is ready for installation Do not remove the stiffener from inside the wall case or the weather closure panel from the outside face of the wall case until the outdoor grille and chassis are ready to be installed Installation of Wall Case in Wall Opening 1 Position the wall case into the wall The room side edge of the wall case should be at least flush with the finished wall for line cord installations and permanent connection installations when no sub base is used and should project into the room at least 2 3 8 when a sub base is used If the minimum exterior dimensions are not met refer to page 20 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes The outside edge of the wall case should extend at least 1 4 beyond the outside wall This is necessary for proper caulking to prevent sealing thedrain holes in the rear flange of the wall case and to facilitate the installation of an accessory drain if used The wall case should be secured to the wall at both sides Use a minimum of two screws or other fastening device on each side See Figure 23 page 20 Mark th
31. e Y Check of outdoor coil heat exchanger amp the fan Check heat load increase operation Check gas leakage Unexpected residue Repair gas leak Overloaded Circuit r Replacement of unit if the unit is beyond repair Check of inside gas pressure Adjusting of refrigerant charge Malfunction of compressor Replacement of compressor Check clogging in refrigeration circuit y Satisfactory operation with temperature difference of Repair clogging in inlet amp outlet air 44 6 50 F refrigeration circuit 7 10 C Copyright 2008 LG Electronics Inc All right reserved 39 Only for training and service purposes LGE Internal Use Only Fails to Start Check power source Check control switch setting Only compressor fails to start Drop of power voltage Defect of compressor capacitor Check capacitor Replacement Check circuit breaker and fuse Gas leakage of feeler bulb of thermostat Check control switch Y Only fan fails to start Y Improper wiring Improper thermostat setting Y
32. e 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 c Turn off valve B and allow pressure to drop d Repeat steps B and C until the balance of the charge is in the system 6 When satisfied the unit is operating correctly use the pinch off tool with the unit still running and clamp on to the pinch off tube Using a tube cutter cut the pinch off tube about 2 inches from the pinch off tool Use sil fos solder and solder pinch off tube closed Turn off the unit allow it to set for a while and then test the leakage of the pinch off connection Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 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 service valve CONDENSER COMPOUND SAGEN HIGH PRESSURE SIDE O O MANIFOLD X GAUGE B CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR LOW PRESSURE SIDE COMPRESSOR EXTERNAL VACUUM PUMP rer CHARGING CYLINDER Figure 21 A Pulling Vacuum Figure 21 B Charging Copyright 2008 LG Electronics Inc All right
33. e until the chassis is to be installed Figure 22 FASTENING WALL CASE MAIN STUDS MOUNTING SCREW HOLE NO HOLES PERMITTED IN BOTTOM OF CASE NO HOLES PERMITTED IN BOTTOM OF CASE JACK STUD MAIN STUD Framing detail for this construction is as shown in Figure 22 Note use of lintel under first course of brick above theZoneline case Choice of attachment devices Do not use the case as alintel Mounting screw through both ends of case or thetop holes shown are tobe made by the installer Mounting screw holes and attachment devices by installer Figure 23 Copyright 2008 LG Electronics Inc All right reserved 20 Only for training and service purposes 31VNH3 ETV ALINGNOD AlddNS YAMOd onnvo vOZx VH 3sva ans 0181X3 pue 1 Ano jJe eseo JO punoie l3NI8VO INOOH qD YooaLNO YATIVLSNI A8 SMA YDS ONILNNOW 8 pa12euuo aseg qns l3duvo JO dOl YOOT4 GSHSINI pue 10193u Bulpying eui 31 INO 1 punoije l3duvo 310V1d323H TIVM JO dOl HO Y00714 Q3HSINIJ P LINGNOD AlddNS YAMOd M v nva a dri YOOdLNO l3NIg8VO 38 TIVM INOOH YATIVLSNI SM382S ONILNNOW o LLa v 1 LLGVY 8 2 02 wS L EL
34. e components by referring to the removal procedure Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes hab i DD Figure 9 m Figure 10 lt 7 A POIROT Figure 11 Figure 12 211 LGE Internal Use Only 2 2 4 SHROUD 1 Remove the axial fan Refer to section 2 2 3 2 Remove the 4 screws which fasten the condenser with the shroud and the basepan See Figure 11 3 Remove the shroud 4 Re install the component by referring to the removal procedure 2 3 ELECTRICAL PARTS 2 3 1 OUTDOOR MOTOR 1 Remove the clamp cord and disconnect a wire housing in control box Refer to section 2 1 2 2 Remove the axial fan Refer to section 2 2 3 3 Remove the 2 screws which fasten the motor See Figure 14 4 Remove the motor 5 Re install the component by referring to the removal procedure above 2 3 2 INDOOR MOTOR Refer to section 2 2 2 2 3 3 COMPRESSOR 1 Discharge the refrigerant system using a refrigerant recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the refrigerant Leave the valve in place after servicing the system 2 Disconnect the 3 leads from the compressor 3 After purging the unit completely unbraze the suction and discharge tubes at the compres
35. e grille to the front grille with 4 screws Copyright 2008 LG Electronics Inc All right reserved 8 Only for training and service purposes Figure 1 NN EM LGE Internal Use Only 2 1 2 CONTROL BOX 1 Remove the front grille Refer to section 2 1 1 2 Remove the two screws which fasten the control box See Figure 2 3 Pull the control box from the Air guide 4 Remove the control box cover See Figure 3 5 Disconnect wire housings on the control box 6 Pull the control box assembly out from the unit See Figure 4 7 Re install the components by referring to the removal procedure Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes M s Figure 2 O IIX 55 UOU 0 we Figure 3 2 7 774 CH FC Mod 53 EN 002 Y Figure 4 LGE Internal Use Only 2 2 AIR HANDLING PARTS a Z LL a oc I oc O Lu 2 2 1 ELECTRIC HEATER Refer to section 2 1 1 2 Remove the control box assembly 1 Remove the front grille Refer to section 2 1 2 3 Remove the 4 screws which fasten the Evaporator 6 ID A
36. e wall case on each side 2 from the bottom and 2 from the top at a point where basic wall structure is located Drill wall case and use fasteners appropriate for wall construction All holes for fasteners in the side of the wall case must be at least 2 up from the bottom of the wall case Never locate screws or put other holes in the bottom of the wall case If the wall opening is greater than the case dimensions spacers must be used on the sides between the wall case and the wall support structure to prevent distorting the wall case Caulk or gasket the entire opening on the outside between the wall case and exterior wall surface 4 sides to provide total water and air seal Caulk or gasket room side opening between wall case and interior wall surface 4 sides Opening beneath or around the wall case can allow outdoor air to leak into the room resulting in increased operating costs and improper room temperature control no e A Care should be taken in location of electrical supply entry in relationship to wall sleeve to assure access to receptacle or junction box once unit is installed 19 LGE Internal Use Only FRAMING FOR WALL CASE BRICK VENEER AND FRAME CONSTRUCTION MAIN STUD JACK STUDS HEADER 4 x 4 OR 2 2 x 4 ON EDGE ADJUSTABLE FRAMING TO SECURE THIS DIMENSION 42 1 4 _____________ gt JACK STUD CRIPPLE FINISHED FLOOR SUB FLOOR Note Do not remove the stiffener support from inside the wall cas
37. efully and then unbraze the interconnecting tube at the evaporator connectors Remove the evaporator Re install the components by referring to notes See Figure 20 2 4 3 CAPILLARY TUBE 1 2 After discharging the refrigerant completely unbraze the interconnecting tube at the capillary tube Remove the capillary tube 3 Re install the components by referring to notes Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 14 Figure 19 Figure 20 LGE Internal Use Only NOTES Replacement of the refrigeration cycle 1 When replacing the refrigeration cycle be sure to discharge the refrigerant system using a refrigerant recovery system If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the refrigerant Leave the valve in place after servicing the system 2 After discharging the unit completely remove the desired component and unbraze the pinch off tubes 3 Solder service valves into the pinch off tube ports leaving the valves open 4 Solder the pinch off tubes with service valves 5 Evacuate as follows 1 Connect the vacuum pump as illustrated Figure 21 A 2 Start the vacuum pump slowly open manifold valves A and B with two full turns counterclockwise and leave the valves closed
38. eling legs are supplied in each kit 2 One kit is required per unit 3 Four mounting screws are provided in each kit Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Installation on Wall Sleeve 1 Drill four 1 8 inch diameter holes in the wall sleeve two on each side using the leveling legs as a template Caulk around screws to prevent water leaks 2 Attach the legs to the wall sleeve using the screws provided 3 Adjust the leveling legs to level the wall sleeve from side to Side and provide a slight pitch to the outside one quarter bubble in sight glass Figure 49 Leveling Leg Installation on Wall Sleeve 1 8 Diameter holes four required per unit field drilled 32 LGE Internal Use Only Hard Wire Kit Part No AYAGALAO1 Description Hard Wire Junction Box Direct Wire Sub Base The hard wire junction box kit is used to hard wire the unit when it is not desirable to use the standard unit subbase or the unit power cord The junction box provides a protected enclosure for electrical connections as required by some electrical codes The hard wire junction box is intended to be mounted on the floor or the adjacent wall The junction box is furnished with approximately 2 1 2 feet of 1 2 inch flexible steel conduit and a metal box for securing the conduit to the unit cabinet at the incoming power opening An optional 230 208V or 265V power switch
39. ets A on the outdoor portion of the wall sleeve as shown in Figure 46 These components may be installed after the sleeve is secured in the wall opening just prior to the installation of the condenser grille and chassis Figure 47 MEAE CECI CR A CE IC MDC CC el eee 500 Dia C of Mtg TA iau 156 Dia Min Mtg Holes 2 Dim Not to scale Inside Edge of Front Sleeve Flange Y t 3 500 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Leveling Legs Part No AYLL101 Description Leveling legs are designed to provide extra front support and leveling of the wall sleeve Two leg assemblies are required per unit and are provided in each kit Four screws are also provided with each kit for attachment to the wall sleeve See Figure 48 The leveling legs must be installed before the chassis is installed but after the wall sleeve is in place Holes must be drilled in each side of the wall sleeve below the duct package holes for attachment to the wall sleeve Receiving Compare kit identification number with sales order to ensure that the correct kit has been received Inspect the leveling legs for shipping damage File damage claims with the delivering carrier immediately Installation The installation and servicing of this equipment should be performed by qualif
40. http biz lgservice com Window Air Conditioner MODEL LP091CEM Y8 CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel Model LP091CEM Y8 Cooling Capacity 2 58 Heating Capacity for Heat Pump models 8 800 Electric Heater capacity 3 1 3 5 10 500 11 900 Power Input Cooling Heating 800 810 Running Current Cooling Heating 3 8 3 6 Starting current Cooling Heating Electric Heater Current 14 9 152 EER 3 11 3 11 Btu h W 11 0 11 0 COP WW Power Supply Q V Hz 1 208 60 1 230 60 Power Factor o 99 9 97 8 Air Flow Rate Indoor Max m min CFM 11 390 Outdoor Max m min CFM 17 600 Moisture Removal Vh 1 2 Sound Level SoundPressure 1m Indoor H M L dB A 3 45 43 Outdoor Max dB A 3 60 59 Refrigerant amp Charge 0 02 560 Compressor Type Rotary Non Tropical Model QA114KCB Motor Type PSC Oil Type SUNISO 4GSI or NM56M Oil Charge 290 O L P Name 6750U L018A Type In Out Cross Flow Fan Axial Fan Motor Type In Out 4 Poles Motor Output In Out 145 Power Supply Cable Power Cord 3 2 1 Dimensions W H D 1 066 406 505 42 16 19 7 8 Net Weight
41. ied experienced technicians N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Checklist The following is an abbreviated guide to leveling leg installation Refer to appropriate areas for more detailed information 31 LGE Internal Use Only Leveling Leg Assembly To install the leveling leg assembly complete the following 1 Drill two 1 8 inch holes in each side of the wall sleeve as shown in Figure 48 using the leveling leg assembly as a template Locations near the front of the sleeve provide more support Adjust the leveling legs to the approximate height needed and install them on either side of the wall sleeve using the screws provided Bottom of wall sleeve can be anywhere from three to five inches above the screw base Caulk around screws to prevent water leaks Level the sleeve horizontally from side to side Provide a slight slope one quarter bubble in the sight glass toward the outside Check the level again after the unit has been installed Adjust the legs as needed no Co Figure 48 Leveling Leg Assembly Speed Grip Nut Adjuster Screw NOTES 1 Two lev
42. ire junction box 25 LGE Internal Use Only 7 Remove the screw that attaches the electric heater wire to 11 Install tube 1 and tube 2 ref fig 38 on the pump the side of the indoor fan housing assembly using the rubber elbows as shown in fig 35 8 Remove the 3 screws which fasten the top cover assembly Figure 35 12 Position pump assembly to the basepan as shown in fig 9 Position water spraying plastic tube into the electric heater 36 and fasten the pump bracket to the basepan using the cover Make sure that the three pairs total of six of plastic three screws provided tongues snap into the corresponding metal slots of the heater frame as shown in fig 34 Then install one of the Figure 36 three rubber elbows ref fig 38 at the inlet of the spraying tube and through the rubber grommet Figure 34 13 Insert tube 2 of the pump assembly through the plastic grommet of the sheet metal partition as shown in fig 37 Then connect the end of tube 2 to the plastic elbow coming out of the inlet of the spraying tube 10 Place the top cover assembly back into the unit Figure 37 Copyright 2008 LG Electronics Inc All right reserved 26 Only for training and service purposes Figure 38 Spraying Tube Pump assembly Rubber s elbows 3 e 14 Connect the condensate pump to the ICR Tube 2 15 Assembly the unit back following the
43. itect is necessary Unit location electrical connection locations and wall openings of the proper dimensions are essential to avoid the necessity of rework fillers framing moving electrical outlets and other expensive modifications For existing construction it is important that carpentry masonry and electrical work be performed by competent qualified personnel Since installations in existing construction may involve removal of building material from the structure locating the wall case must be done correctly 18 LGE Internal Use Only 3 2 2 PREPARATION OF THE FRONT GRILLE Carefully remove shipping tape from the front grille C yas I _S Shipping Tape Brick Frame Stucco and Shingle Construction For new construction the opening for the wall case should be framed and the wall case inserted into the opening during construction Lintels should be used when the building material is heavy and is not self supporting such as brick The wall case will fit an opening of six courses of standard brick or five courses of jumbo brick Wall framing in this type construction is normally on 16 centers and the wall case will fit a framed opening spanning three 16 O C 2 x 4 stud spaces For existing construction the indoor and outdoor wall will need to be cut out allowing for clearances of 1 8 on all sides of the wall case Work should begin on the inside wall Cut the correct dimensions and mark using
44. ling temperature limits by dip switches on control panel from 50 F to 90 F Temperature limits help to prevent overheating and overcooling and reduce energy costs Condensate Drain Valve The unit has a condensate drain valve to prevent water from collecting or freezing in the basepan Quick Heater Recovery The unit is designed to operate the electric heater to warm the room to the temperature set point as soon as heat pump cycle is on in heating This feature has an advantage of reducing the time to reach the set point and improving the temperature increase for better comfort Reverse Cycle Defrosting PTHPs only The unit will activate the reverse cycle defrost when the outdoor coil temperature has remained at a cold temperature to form the ice on the coil This ice will reduce airflow though the coil and will also reduce the efficiency of unit The LG PTHP will employ an active reverse cycle defrost function to melt the ice off the outdoor coil for insuring room comfort conditions and savings from extended operation High Temperature Heat Pump Operation Protection The compressor will be switched off to prevent damage when the heat pump is operated in high outdoor temperatures Remote Thermostat Control Each unit is built to be operated from any standard 4 or 5 wire remote mounted thermostat if desired The unit has a built in low voltage power source which can accommodate a large variety of thermostat choices manual auto changeover
45. mit 3 z TEMPERATURE LIMITING LM Temperature Limiting can save money by limiting the lowest temperature for cooling and the highest temperature for heating The temperature limiting is controlled by dip switch 1 3 This temperature limiting is not available with the Remote Wall Thermostat Temperature Temperature Temperature Cooling Operation Heating Operation Limit 1 Limit 2 Limit 3 Lowest Temp Highest Temp Lowest Temp Highest Temp OFF OFF OFF 54 F 12 2 C 86 F 30 0 C 54 F 12 2 C 86 F 30 0 C ON OFF OFF 56 F 13 3 C 86 F 30 0 C 54 F 12 2 C 84 F 28 9 C OFF ON OFF 58 F 14 4 C 86 F 30 0 C 54 F 12 2 C 82 F 27 8 C ON ON OFF 60 F 15 5 C 86 F 30 0 C 54 F 12 2 C 80 F 26 7 C OFF OFF ON 62 F 16 6 C 86 F 30 0 C 54 F 12 2 C 78 F 25 5 C ON OFF ON 64 F 17 7 C 86 F 30 0 C 54 F 12 2 C 76 F 24 4 C OFF ON ON 66 F 18 9 C 86 F 30 0 C 54 F 12 2 C 74 F 23 3 C ON ON ON 68 F 20 0 C 86 F 30 0 C 54 F 12 2 C 72 F 22 2 C Copyright 2008 LG Electronics Inc All right reserved 6 Only for training and service purposes LGE Internal Use Only REMOTE LOCAL CONTROL When remote local switch 1 is on it allow the unit to operate by the control of Remote Wall Thermostat The unit control by knobs are not
46. nd servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may result in equipment damage Note When using a subbase the wall sleeve must be installed a minimum of 3 1 4 inches 83 mm above a finished floor and a minimum of 2 3 4 inches 70 mm from a finished wall Remove parts B and C Figure 58 next page from the subbase and join together using two metal screws provided This assembly now becomes the right front cover Part F of the subbase Figure 57 next page Position subbase under the front of the wall sleeve o Align the back edge of the flange on cover A Figure 58 next page to front of the wall sleeve flange Figure 59 next page Drill four 1 8 inch holes in wall sleeve to line up with holes in subbase Figure 58 Location D next page Mount subbase to wall sleeve with four sheet metal screws provided with kit Fig
47. ore servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Note A baffle kit must not be used with a stamped aluminum grille on any PTAC installation Stamped Aluminum Grille 1 Prepare the wall sleeve for installation of the grille by removing the cardboard stiffener and rear enclosure panel from the sleeve These items may be removed from inside of the building Note The sleeve stiffener must be taken out before the rear sleeve enclosure panel can be removed from the sleeve 2 Prepare the stamped aluminum grille for installation on the sleeve by inserting the six 6 plastic grommets into the square holes located near the outer edges of all four sides of the grille With the grille positioned so the flanges of all four sides are in the up position insert the grommets so the square end protrudes through the grille in the opposite direction from the flanges Turn the grille so it can be removed through the rear sleeve opening Install the stamped aluminum grille by aligning the guide pins located in the lower right and left hand corners of the grille with the corresponding holes in the rear of the wall sleeve Secure the grille by threading each of the screws into the plastic grommets Remove the wire handle
48. p inside the metal box and tighten the ring securely 10 Insert the three wires extending from the metal box into the incoming power opening on the unit so that approximately 20 inches 508 mm of the wires protrude through the opening 11 Attach the metal box to the chassis with the two screws provided See Figure 50 12 Insert the wire tie into the 1 4 inch diameter hole located just above the incoming power opening Tie all wires together securely with the wire tie See Figure 51 99 pA N co 33 LGE Internal Use Only 208 230 Volt Units 1 Remove and discard the white lead from the wire assembly no Connect the black lead to the line 2 terminal on the control board Co Connect the red lead to the common C terminal on the capacitor A Connect the ground wire to the partition panel where the ground wire on the power cord was located Use the supplied green ground screw Connect the red lead in the wire assembly at the junction box to the red lead of the field power source Connect the black lead the wire assembly at the junction box to the black lead of the field power source N Connect the ground wire of the field power source to the ground wire of the wire assembly at the junction box Install the junction box cover plate co Reinstall the control panel assembly 265 Volt Units 1 Remove and discard the red lead from
49. pt Unit must be stored in its original shipping carton in a dry secure place prior to its installation and use Installation The installation and servicing of the equipment referred to in this booklet should be performed by qualified experienced technicians N WARNING Hazardous Voltage Disconnect all electric power including remote disconnects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvertently energized Failure to disconnect power before servicing could result in death or serious injury Important Note The unit OFF switch does not disconnect all electrical power to this unit Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Remove front plastic cover by rotating bottom outward and then lifting up and out from chassis no Unplug and remove the PTAC chassis from the wallsleeve Movethe chassis where the front and back of the chassis can be easily accessed Remove the wire junction box cover by removing four screws and lifting up as shown in figure 31 e Figure 31 A Remove and set aside the air discharge screen by unscrewing the 5 screws on the top e Remove the one screws holding the control board cover as shown figure 32 Remove the cover by lifting it up so its free from its hinges and put aside Figure 32 6 Unplug the electric heater connecter located inside the w
50. reserved 16 LGE Internal Use Only Only for training and service purposes 3 1 HOW TO INSTALL THE UNIT CUD There are sharp edges that can cause serious cuts When lifting the air conditioner it is HEAVY Use 2 people to lift For existing sleeve you should measure the wall sleeve dimensions Install the new air conditioner according to these installation instructions to achieve the best performence All wall sleeves used to mount the new air conditioner must be in good structural condition and have a rear grille that securely attaches to the sleeve or the flange of the sleeve to secure the new air conditioner To avoid vibration and noise make sure the unit is installed securely and firmly When installing the sleeve make certain there is nothing within 20 of the back that would interfere with heat radiation and exhaust air flow Dimension of air conditioner 9 1 066 42 Dimension of sleeve assembly optional 42 1 2 SQ HOLE 2 REQ D 2 2 3 4 1 1 2 1 2 16 2 2 5 515 8 Z 4 21 6 1 2 DIA 36 HOLE 3 REQD Wall opening 16 1 4 x42 1 4 Insulation strip must be attached to prevent the re circulation of exhaust air to inward side from the either side of condenser space The insulation strip is provided with the box Refer to the diagram below ly GRILLE TOP VIEW FRONT GRILE 1 Take ou
51. s Any other use may increase the risk of personal injury or property damage 1 Remove front from unit by pulling bottom out and then lifting upward Figure 28 Figure 30 New Door Installation Figure 28 Remove Front Hinge Pins Each Side Brackets Each Side Copyright 2008 LG Electronics Inc All right reserved 24 Only for training and service purposes LGE Intemal Use Only Condensate Disposal Pump Kit Installation Part No AYSB2101 Description The internal condensate pump serves as a means for disposing of condensate generated during heat pump operation by transferring it to the indoor coil The warm coil surface and the warm room air help in evaporation of the condensate while adding humidity to the room As with any equipment of this type the addition of this kit will decrease the effective heating capacity of the unit This kit is not intended for use in seacoast or corrosive environments NOTE Under extreme high humidity conditions the internal condensate pump may not be able to dispose of all the condensate produced and condensate would then drip from the outside of the wall sleeve If this condensation is unacceptable then a drain system including factory approved drain kit for the wall sleeve should be installed Receiving Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery recei
52. sor connections 4 Remove the 3 nuts and the 3 washers which fasten the compressor See Figure 15 5 Remove the compressor 6 Re instill the components by referring to the removal procedure above 2 3 4 CAPACITOR 1 Remove the control box Refer to section 2 1 2 2 Remove 1 screw and disconnect the leads which connected to the box type capacitor See Figure 16 3 Remove 1 screw and the clamp which fastens the can type capacitor 4 Disconnect all the leads of capacitor terminals 5 Re install the components by referring to the removal procedure above Figure 13 Figure 15 Figure 16 Copyright 2008 LG Electronics Inc All right reserved 12 Only for training and service purposes LGE Internal Use Only 2 3 5 POWER CORD 1 Remove the control box Refer to section 2 1 2 2 Disconnect the grounding screw from the control box 3 Disconnect 2 receptacles Remove a screw which fastens the clip cord 5 Separate the power cord from the control box See Figure 17 6 Re install the component by referring to the removal procedure above Use only one ground marked hole for ground connection 7 If the supply cord of this appliance is damaged it must be replaced by an exact replacement part The special cord means the cord which has the same specification marked on the supply cord Figure 17 fitted to the unit A 2 3 6 P C B 1 Remove the escutcheon 2 Remove the two
53. stem Refer to Figure 66 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS SUCTION LIME VAPOR INLET COMPLETE LIQUID COOL Low PRESSURE VAPOR BOIL OFF POINT DISCHARGED COOLED AIR AIR i ROOM AIR HEAT LOAD lt _ OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH P lt Bia OMPRESSOR Ol LIQUID PRESSURE LIQUID OUTLET DROP LIQUID REFRIGERANT E GI PRESSURE VAPOR CAPILLARY TUBE NES PeFRIGERANT LOW PRESSURE VAPOR Figure 62 Copyright 2008 LG Electronics Inc All right reserved 38 Only for training and service purposes LGE Internal Use Only 5 3 TROUBLESHOOTING GUIDE In general possible trouble is classified in two causes The one is Starting Failure which is caused from an electrical defect and 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 of cold air circulation for smooth flow Dirty indoor coil Heat exchanger Y Malfunction of fan Clogged of air filter Obstruction at air outlet Correct above troubl
54. t the insulation strip from the upper packing 2 Attach the insulation strip onto the rear upper side of the wall sleeve 3 To improve unit energy efficiency it is recommended the change of outside grille for an unit protection and an addition of a plastic rear grille This is optional 4 Insulation strip prevents the exhaust air from re entering from either side of condenser space which may decrease the cooling efficiency of condenser Copyright 2008 LG Electronics Inc All right reserved 17 Only for training and service purposes COOLED AIR INTAKE AIR INSULATION 1 4 Bubble of the level Rear LGE Internal Use Only 3 2 WALL SLEEVE INSTALLATION 3 2 1 Wall Case Installation Data General Generally units are installed 3 to 5 above the floor flush to finished floor installation is possible as near to the center of the room as possible underneath a window or a glass panel is typical Normal installation of the wall case allows installation flexibility from flush with the finished interior wall to a minimum of 1 4 of the wall case extending beyond the finished exterior of the building Special consideration must be given to installations where the wall case does not extend a minimum of 1 4 beyond the finished exterior wall Regardless of the installation there are several things to consider when selecting a location for installing the unit For instance drapery location coul
55. tallation The internal drain is installed on the bottom of the wall sleeve when it is required to drain the condensate into a drain system inside of the building The components of the wall sleeve drain kit are shown in Detail A Use components C 2 D E mounting screws 6 and the Outdoor drain fitting 1 The components D E and drain fitting of the kit are mounted on the bottom of the wall sleeve prior to the installation of the sleeve It may be located in a feasible area on the bottom of the sleeve which is inside of the room except when a subbase is used When a subbase is installed the drain may be a minimum of 3 1 2 from the front flange of the wall sleeve The minimum clearance should provide adequate clearance for the subbase see Figures 46 and 47 Cut out the template in the lower right hand corner of these instructions to locate the field drilled holes Two to mount the plate and one for the Outdoor drain fitting See Detail A on how the components have to be installed after the holes are drilled in the bottom of the wall sleeve If the drain fitting is not connected to an indoor drainage system immediately after the wall sleeve is installed it must be plugged with a cork to prevent indoor water damage in case it rains no An indoor tube or hose furnished by others must be installed on the drain fitting and interconnected to the drain system inside of the building Install the two blank off plates C and gask
56. ure 58 Location D next page A Remove the left front cover from the subbase Figure 58 Part A next page Position skirting on each side of wall sleeve to prevent the entry of foreign materials Trim skirting to desired length Attach skirting with four sheet metal screws provided with kit Figure 58 Location E next page 7 Wire subbase for appropriate voltage Figure 60 next page 36 LGE Internal Use Only Note The proper subbase must be ordered to obtain the correct electrical receptacle Figure 61 8 After wiring is complete mount covers A and F to the subbase with provided screws Figure 58 9 When installing optional accessories to the subbase refer to each installation instruction for that accessory Figure 57 Figure 58 Part Location Identification Part Location Identification A LeftFrontCover Right Front Cover Front Cord Panel Wall Sleeve Hole Location Skirting Hole Location gt Right Cover Assembly Wall Sleeve 2 2 13 16 D 71 mm Wiring A Access e CSS eS Low Voltage Compartment Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes Figure 59 Dimensions 13 3 4 Wall Sleeve Outdoor Side 46 16 23 4 Wall Sleeve 2 34 4 Inside Edge Y Back of jos Flange A 25e Left End View o amp
57. without removing the front grille Rotary Compressor The unit uses a rotary compressor for quiet reliable operation and long life 2 Position Discharge Grille The discharge grille can provide air flows upward at an angle of 40 off vertical or 15 degree off vertical The angle is changed by removing the front grille and 4 screws that fasten the discharge grille to the front grille and rotating the louvers to an alternate position Indoor Room Freeze Protection When the unit senses the room temperature falls to less than 40 F the unit activates the fan motor and either the electric resistance heater or the hydronic heater to prevent pipes or fixtures from freezing This also overrides front desk control of the unit mounted or wall mounted controls Door Switch Occupancy Sensor The unit is capable of accommodating a field installed door switch and occupancy sensor to operate the energy management feature For additional information refer to the unit operation section Compressor Overload Protection This feature prevents the damage of the compressor by sensing the indoor tube temperature in heating If the indoor temperature is over 130 F the outdoor fan will be switched off and back on when the temperature drops below 120 F Outdoor Air Temperature Switchover This will effectively change the unit from heat pump mode to total electric resistance heat Temperature limits The unit is programmed to provide both heating and coo
58. ws provided See Figure 45 for finished left hand side installation Co If the unit chassis is to be installed right away install the condenser grille to wall sleeve with hardware provided See condenser grille installation instructions If the unit chassis will not be installed right away replace the rear enclosure panel in the wall sleeve This will help protect the inside of the building from weather damage If a subbase is used be sure the right hand subbase cover is removed before the chassis is installed in the sleeve Slide the chassis into the wall sleeve until the chassis flanges Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes contact the front edge of sleeve Secure the chassis to the wall sleeve on each side with screws provided Re install the cabinet front See the following pages for installation instructions of indoor drain kit Figure 43 Figure 44 A A PLATE B K DRAIN FITTING Figure 45 ub e e i BLANK OFF SHEET METAL SCREWS Figure 46 ZA Re See Detail A Le ss 7 Sleeve overflow port m Do not close up this port E9 Gasket 2 19 7215 Blank off Plate 2 ss 4 Mounting Screws g s Wall Sleeve Bottom L l 1 2 Outdoor Drain Fitting C MTG Screws Detail A 30 LGE Internal Use Only Indoor Drain Kit Ins
59. zardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices CAUTION Indicates a situation that may result in equipment or property damage only accidents Control Panel Key Lock 2 Remove existing door assembly by lifting door halfway and f using both hands bow door just enough for door hinge pins to slide out of mating holes Figure 29 s Figure 29 Door Removal Description The Key Lock kit prevents tampering of the controls used to set temperatures and heating or cooling functions Receiving ae Upon receipt of the product inspect the shipping carton for signs of visible damage Report any damage or shortage to the carrier and note it on the delivery receipt Unit must be stored in its original shipping carton in a dry secure place prior to its installation and use 3 Install the new door assembly with the key lock by bowing the door with both hands and aligning the door hinge pins with their bracket in the front Figure 30 Important Note Installation Personal Risk Hazard Underwriter s Laboratories Inc listed The installation and servicing of the equipment referred toin For institutional use only where supervisory monitoring is this booklet should be performed by qualified experienced available technician
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