SINGLE ZONE MEGA, STANDARD EFFICIENCY, AND MEGA 115V WALL MOUNTED INSTALLATION MANUAL Single Zone Mega: LS090HEV2, LS120HEV2, LS180HEV2, LS240HEV2 Single Zone Standard Efficiency: LS090HFV3, LS120HFV3, LS180HFV3, LS240HFV3 Single Zone Mega 115V: LS090HXV2, LS120HXV2
PROPRIETARY DATA NOTICE This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc., and are disclosed by LG Electronics U.S.A., Inc., only in confidence. This document is for design purposes only. Do not throw away, destroy, or lose this manual. Please read carefully and store in a safe place for future reference. Content familiarity required for proper installation.
SAFETY INSTRUCTIONS The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols described below. TABLE OF SYMBOLS DANGER This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual SAFETY INSTRUCTIONS INSTALLATION - CONTINUED If the air conditioner is installed in a small space, take measures to prevent the refrigerant concentration from exceeding safety limits in the event of a refrigerant leak. Consult the latest edition of ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers) Standard 15.
SAFETY INSTRUCTIONS WIRING High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Turn the power off at the nearest disconnect before servicing the equipment. Electrical shock can cause physical injury or death. Properly size all circuit breakers or fuses. There is risk of fire, electric shock, explosion, physical injury or death.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual SAFETY INSTRUCTIONS OPERATION Do not provide power to or operate the unit if it is flooded or submerged. There is risk of fire, electric shock, physical injury or death. Use a dedicated power source for this product. There is risk of fire, electric shock, physical injury or death. Do not operate the disconnect switch with wet hands. Periodically verify that the hardware securing the unit has not deteriorated.
TABLE OF CONTENTS Safety Instructions.............................................................................. 3-6 General Data...................................................................................... 8-13 Unit Nomenclature................................................................................ 8 Parts..................................................................................................... 9 Specifications................................................................
GENERAL DATA Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Unit Nomenclature Single Zone Wall Mount Indoor and Outdoor Units LS N 090 HEV Family LA= Art Cool Premier / Gallery / Mirror LS= High Efficiency Wall Mount / Standard / Mega Type N = Indoor Wall Mount Unit U = Outdoor Heat Pump Unit No N or U = System Nominal Capacity (Nominal cooling capacity in Btu/h) 090 = 9,000 120 = 12,000 180 = 18,000 240 = 24,000 300/307 = 30,000 360 = 36,000 Indoor/Outdoor Prod
GENERAL DATA Parts Required Tools (field provided) • • • • Level Screwdriver Electrical lineman pliers Electric drill • • • • Hole saw Drill Flaring tool set Tubing cutter • • • • Tube/pipe reamer Torque wrenches Allen wrench Gas-leak detector • • • • Thermometer Measuring tape Multimeter Ammeter Required Parts (field provided) • Connecting cable (power and control) • Pipes - vapor line and liquid line, with insulation • Insulated drain hose • Additional drain hose Included Parts (Depends on Mode
GENERAL DATA Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Specifications Table 1: Single Zone Mega System Specifications. LS090HEV2 LS120HEV2 LS180HEV2 LS240HEV2 (LSN090HEV2/ (LSN120HEV2/ (LSN180HEV2/ (LSN240HEV2/ LSU090HEV2) LSU120HEV2) LSU180HEV2) LSU240HEV2) Cooling Capacity (Min/Rated/Max) (Btu/h) 3,070 ~ 9,000 ~10,330 3,070 ~ 12,000 ~ 13,780 3,685 ~ 18,000 ~ 18,493 3,685 ~ 22,000 ~ 24,000 Cooling Power Input1 (kW) 0.72 1.142 1.5 2.
GENERAL DATA Specifications EEV: Electronic Expansion Valve IDU: Indoor Unit ODU: Outdoor Unit This unit comes with a dry helium charge. This data is rated 0 ft above sea level with 24.6 of refrigerant line per indoor unit and a 0 ft level difference outdoor and indoor units. Cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
GENERAL DATA Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Specifications Table 3: Single Zone Mega 115V System Specifications.
GENERAL DATA Electrical Electrical Data for Mega, Standard Efficiency Models Table 5: 208-230V, 60Hz, 1-Phase Single Zone Mega, Standard Efficiency System Electrical Data Table. Compressor Outdoor Fan Motor RLA Motor Cooling Heating W FLA Indoor Fan Motor W FLA Voltage Unit Model Hertz Voltage Range (Min. No. to Max.) MCA MOP Compressor Quantity 3/4 LS090HEV2 10.0 15 1 7.0 7.0 43 0.4 30 0.4 1 LS120HEV2 10.0 15 1 7.0 7.0 43 0.4 30 0.4 1-1/2 LS180HEV2 15.0 20 1 10.0 10.
GENERAL INSTALLATION GUIDELINES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Outdoor Unit Location Selection Selecting the Best Location for the Outdoor Unit • DANGER Do not install the unit in an area where combustible gas will generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death.
GENERAL INSTALLATION GUIDELINES Outdoor Unit Location Selection Planning for Snow and Ice, continued. When deciding on a location to place the outdoor unit, be sure to choose an area where run-off water from defrost cycle will not accumulate and freeze on sidewalks or driveways, which will create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking, leaking, and causing unsafe conditions from frozen condensate.
GENERAL INSTALLATION GUIDELINES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Outdoor Unit Location Selection Oceanside Applications Figure 2: Oceanside Placement Using Windbreak. Use of a Windbreak to Shield from Sea Wind Windbreak Ocean winds will cause corrosion, particularly on the condenser and evaporator fins, which, in turn could cause product malfunction or inefficient performance.
GENERAL INSTALLATION GUIDELINES Required Outdoor Unit Clearances Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper operation. When installing the outdoor unit, consider service, inlet and outlet, and minimum allowable space requirements as illustrated in the diagrams below. • Include enough space for airflow and for service access.
GENERAL INSTALLATION GUIDELINES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Rigging and Lifting / Outdoor Unit Mounting Rigging and Lifting Instructions Wear protective gloves and safety goggles when handling equipment. Sharp edges will cause personal injury. Dispose of the packing materials safely. • Packing materials, such as nails and other metal or wooden parts, will cause puncture wounds or other injuries.
GENERAL INSTALLATION GUIDELINES Outdoor Unit Mounting Concrete Platform Specifications • Concrete foundations must be made of one part cement, two parts sand, and four parts gravel. • The surface of the foundation must be finished with mortar with rounded edges, and weatherproofed. Figure 6: Example of Using an Insert for a Hole in a Reinforced Concrete Beam. Figure 7: Close up of Bolt Attachment.
GENERAL INSTALLATION GUIDELINES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Indoor Unit Location Selection / Required Indoor Unit Clearances Selecting the Best Location for the Indoor Unit Follow recommended best practices when choosing an indoor location for the single zone indoor unit. Figure 10: Indoor Unit Clearance Requirements. Unit: Inch (mm) Dos • Follow the table at right for minimum clearance of indoor unit from the top of the unit to the ceiling.
GENERAL INSTALLATION GUIDELINES Indoor Unit Mounting Drilling the Piping Hole in the Wall Figure 12: Drilling Piping Hole. WALL Follow all piping clearance recommendations. 1. Using a 2-9/16 inch hole core drill bit, drill a hole at either the right or left side of the wall mounting, pre-chosen following installation guidelines and application needs. • The slant of the hole must be 3/16” to 5/16 inches from level with the slant being upward on the indoor unit side and downward on the outdoor unit side.
GENERAL INSTALLATION GUIDELINES Installation Plate 3-9/32 (83) Chassis Hook 2-23/32 (69) 7-13/32 (188) Unit Outline 5-9/32 (134) Ø2-9/16 (65) 13-19/32 (345) 5-29/32 (150) Ø2-9/16 (65) 5-13/32 (137) 1-1/16 (27) Type "A" Screws 14-11/16 (373) 1-1/16 (27) 2-3/32 (53) Installation Plate 4-17/32 (115) 2-3/32 (53) Figure 18: Mega, Standard Efficiency 18K and 24K Wall Mount Indoor Unit Installation Plate Dimensions.
GENERAL INSTALLATION GUIDELINES Indoor Unit Mounting Removing the Indoor Unit Bottom Cover (HEV2, HFV3, and HXV2 Indoor Units), continued. Figure 23: Bottom Cover with Top and Middle Unsnapped, Front View (Appearances Will Vary Depending on Indoor Unit Model). Figure 22: Back of Bottom Cover Completely Removed from Indoor Unit (Appearances Will Vary Depending on Indoor Unit Model).
GENERAL INSTALLATION GUIDELINES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Indoor Unit Mounting Mounting the Indoor Unit to the Installation Plate 1. Position the indoor unit onto the upper portion of the installation plate. Figure 25: Attaching the Indoor Unit to the Installation Plate (Appearances Will Vary Depending on Model). 2.
GENERAL INSTALLATION GUIDELINES Indoor Unit Mounting Preparing for Piping / Electrical Connections 1. To prepare the indoor unit for piping and electrical installation, disengage bottom on indoor unit from installation plate by reversing Steps 6, 5, and 4 from the previous procedure, if those procedures have been performed. 2. Unsnap the piping / drain hose holder (L-bracket) out from the indoor unit chassis.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual REFRIGERANT SAFETY STANDARDS / DEVICE CONNECTION LIMITATIONS Refrigerant Safety Standards ASHRAE Standards 15-2010 and 34-2010 address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required to safely dissipate the refrigerant.
SELECTING FIELD SUPPLIED PIPING Selecting Field-Supplied Copper Piping Always follow local codes when selecting and installing copper pipe and piping system components. Approved piping for use with LG Single Zone products will be marked “R410 RATED” along the length of the pipe. Piping wall thickness must meet local code requirements and be approved for a maximum operating pressure of 551 psi.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual COPPER EXPANSION AND CONTRACTION Copper Expansion and Contraction Under normal operating conditions, the vapor pipe temperature of a Duct Free System can vary as much as 280°F. With this large variance in pipe temperature, the designer must consider pipe expansion and contraction to avoid pipe and fitting fatigue failures.
COPPER EXPANSION AND CONTRACTION Table 14: Linear Thermal Expansion of Copper Tubing in Inches. 1 35° 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.48 0.56 0.64 0.72 40° 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.48 0.56 0.64 0.72 45° 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 50° 0.06 0.12 0.18 0.24 0.30 0.36 0.42 0.48 0.54 0.60 0.72 0.84 0.96 1.08 55° 0.06 0.13 0.20 0.26 0.33 0.39 0.46 0.52 0.59 0.65 0.78 0.91 1.04 1.17 60° 0.07 0.14 0.21 0.28 0.35 0.42 0.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual PIPING MATERIALS AND HANDLING Piping Materials and Handling Pipes used for the refrigerant piping system must include the specified thickness, and the interior must be clean. While handling and storing, do not bend or damage the pipes, and take care not to contaminate the interior with dust, moisture, etc. Keep Pipes Capped While Storing. Keep refrigerant pipe dry, clean, and airtight.
REFRIGERANT SYSTEM ENGINEERING Proper system operation depends on the installer using utmost care while assembling the piping system. The following pages are an overview of best practices when installing the refrigerant piping system. LG Electronics U.S.A.,Inc.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual REFRIGERANT SYSTEM ENGINEERING Obstacles Figure 32: Installing Piping Above and Below an Obstacle. When an obstacle, such as an I-beam or concrete T, is in the path of the planned refrigerant pipe run, it is best practice to route the pipe over the obstacle. If adequate space is not available to route the insulated pipe over the obstacle, then route the pipe under the obstacle.
REFRIGERANT SYSTEM ENGINEERING Pipe Sleeves at Penetrations LG recommends that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve. Use 4”+ curved sheet metal saddles between the bottom surface of the pipe and the bottom surface of the penetration. Figure 35: Pipe Sleeve Options.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual FLARING AND BRAZING PROCEDURES Flaring and Brazing Procedures One of the main causes of refrigerant leaks is a defective connection. For LG HVAC systems, the installer needs to know how perform both flared and brazed connections successfully. • During installation, it is imperative to keep the piping system free of contaminants and debris such as copper burrs, slag, or carbon dust.
FLARING AND BRAZING PROCEDURES Tightening the Flare Nuts Tightening Torque for Flare Nuts. Pipe Size (in. O.D.) Outside Diameter (mm) Tightening Torque (ft-lbs.) 13.0 - 18.0 1/4 6.35 9.52 24.6 - 30.4 3/8 39.8 - 47.7 1/2 12.7 45.4 - 59.3 15.88 5/8 71.5 - 87.5 19.05 3/4 Do not use polyolyester (POE) or any other type of mineral oil as a thread lubricant. These lubricants are not compatible with the PVE oil used in this system and create oil sludge leading to equipment damage and system malfunction.
REFRIGERANT PIPING CONNECTIONS Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Installation Overview Installation Single Zone Mega, Standard Efficiency, and Mega 115V Wall-Mounted systems are one-to-one systems. There is a direct piping connection between the outdoor unit and the indoor unit. The figure at right illustrates the basic pipe connections between the outdoor and indoor unit. Refer to the illustration when proceeding with pipe connections.
REFRIGERANT PIPING CONNECTIONS Special Applications Special Applications Figure 39: Special Applications. If an additional drain hose is necessary, the end of drain outlet must be routed above the ground. Secure the drain hose appropriately. When the Outdoor Unit is Installed Below the Indoor Unit: Insulation Seal the small access hole in the wall around the piping. Drain Hose Piping Communication Cables Refrigerant Piping Connections 1.
REFRIGERANT PIPING CONNECTIONS Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Outdoor Unit Connections Outdoor Unit Connections 1. Remove the piping cover or piping / control box cover (configuration depends on outdoor unit model) from the unit by loosening the fastening screws. 2. Align the center of the refrigerant piping and corresponding connection as shown. 3. Refer to the figures below for liquid and gas (vapor) piping attachments onto the outdoor unit. 4.
REFRIGERANT PIPING CONNECTIONS Indoor Unit Connections Removing the Indoor Unit Bottom Cover (HEV2, HFV3, and HXV2) To access the indoor unit piping port connections, and to make the indoor unit installation procedure easier, it is recommended that the bottom cover be removed first. 1. Unsnap the bottom cover at its top left and right sides (Location 1). Figure 44: Removing the Bottom Cover. Figure 45: Removing the Bottom Cover, Alternate View. 2.
REFRIGERANT PIPING CONNECTIONS Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Indoor Unit Connections Accessing and Positioning the Indoor Unit Piping / Connections (HEV2, HFV3, and HXV2), continued. • Do not bend the piping directly backwards or to the left or right sides without bending it downward first; this will damage the indoor unit piping.
REFRIGERANT PIPING CONNECTIONS Indoor Unit Connections Accessing and Positioning the Indoor Unit Piping / Connections (HEV2, HFV3, and HXV2), continued. Piping Installation When Piping is on the Right Side (HEV2, Figure 52: Piping Installation When Piping is on the Right Side. HFV3, and HXV2) Right Side Piping See the Electrical System Installation section for information on how to connect the communication / connection (power) wiring from the outdoor unit. 1.
REFRIGERANT PIPING CONNECTIONS Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Outdoor Unit Drain Piping / Indoor Unit Drain Hose ODU Condensate Drain Piping Installation Depending on the installation location, it could be necessary to install factory-supplied drain plug(s). See the section Outdoor Unit Location Selection for information in reference to ODU placement. Ensure drain piping is insulated.
REFRIGERANT PIPING CONNECTIONS Indoor Unit Drain Hose Condensate Drain Hose Installation; from Indoor Unit to Drain System (HEV2, HFV3, and HXV2), continued. • Insert the drain hose >two (2) inches so it won’t pull out of the field-supplied drain pipe. • Avoid piping the drain hose as shown in the diagrams in the figure below. These methods are incorrect and can cause leaks at the indoor unit site. Figure 61: Inserting the Drain Hose >Two (2) inches Into the Field-Supplied Drain Pipe.
REFRIGERANT PIPING CONNECTIONS Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Indoor Unit Drain Hose Checking the Indoor Unit Drain Hose for Leaks Figure 63: Checking for Leaks at the Indoor Unit. 1. Pour a glass of water on the evaporator. 2. Verify that the water flows appropriately through and out of the drain hose without any leaks.
INSULATION Refrigerant Piping System Insulation For information regarding insulation for underground or penetration situations, see the “General Refrigerant Piping System Information” section. All refrigerant piping from the outdoor unit to the indoor units must be insulated correctly for safety and usage.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual INSULATION Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM) Insulation Wall Thickness Requirements • Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature fluctuations. • Always properly insulate the piping. Insufficient insulation will result in condensation, reduced heating/cooling performance, etc.
ELECTRICAL SYSTEM INSTALLATION Safety Guidelines LS090-120HEV2, LS090-120HFV3, and LS090-120HXV2 indoor units and outdoor units have similar frames; however, LS090-120HEV2 and LS090-120HFV3 systems require 208-230V, 60Hz, 1ph power supply. LS090-120HXV2 systems require 115V, 60Hz, 1ph power supply. Verify which system is being installed. An incorrect power supply will result in electric shock, fire, physical injury, or death.
ELECTRICAL SYSTEM INSTALLATION Power Wiring / Communication Cable Connections, continued To Connect the Wiring to the Terminals: 1. Remove the JIS terminal screws from the (outdoor unit or indoor unit) terminal plate with a JIS screwdriver. (See information about LG terminal connections below.) 2. Position the ring terminal around the terminal, place the terminal screw in the ring, and tighten to the terminal plate using a JIS screwdriver.
ELECTRICAL SYSTEM INSTALLATION Connections and Specifications LS090-120HEV2, LS090-120HFV3, and LS090-120HXV2 indoor units and outdoor units have similar frames; however, LS090-120HEV2 and LS090-120HFV3 systems require 208-230V, 60Hz, 1ph power supply. LS090-120HXV2 systems require 115V, 60Hz, 1ph power supply. Verify which system is being installed. An incorrect power supply will result in electric shock, fire, physical injury, or death.
ELECTRICAL SYSTEM INSTALLATION Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Connections and Specifications Communication / Connection (Power) Cable Specifications from Outdoor Unit to Indoor Unit • For communication / connection (power) wires between the Single Zone outdoor unit and the indoor unit, use a minimum 14 gauge, four (4) conductor, stranded, shielded or unshielded wire. If shielded, the wire must be grounded to the chassis at the outdoor unit only.
ELECTRICAL SYSTEM INSTALLATION Connections and Specifications Figure 79: Typical LS090HEV2, LS120HEV2, LS090HFV3, LS120HFV3 Power / Communication System Diagram. Figure 80: Typical LS180HEV2, LS240HEV2, LS180HFV3, LS240HFV3 Power / Communication System Diagram. Electrical System Installation 208/230 VAC Figure 81: Typical LS090-120HXV2 Power / Communication System Diagram. 115 VAC Due to our policy of continuous product innovation, some specifications may change without notification.
ELECTRICAL SYSTEM INSTALLATION Controller Options Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mount systems include a wireless handheld remote controller (Model No. AKB74955602). Optional LG-suppled wired controllers are available. See “Functions, Controls, Options” in the Single Zone HEV2, HFV3, HXV2 Wall Mounted Engineering Manual”, or contact an LG representative for more information. Figure 82: AKB74955602 Wireless Handheld Remote Controller.
ELECTRICAL SYSTEM INSTALLATION Indoor Unit Electrical Connections Connecting Indoor Unit Electrical Wiring (HEV2, HFV3, and HXV2) • Verify that main power to the unit is completely off before proceeding with these steps as there is a risk of electrical shock, bodily injury, and / or death. • Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so will cause electrical shock, bodily injury, and / or death. 2.
ELECTRICAL SYSTEM INSTALLATION Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Indoor Unit Electrical Connections Cable Installation When Piping is on the Left Side: • Insert the communication / connection (power) cable through the bottom of the indoor unit, • Connect the terminals to the terminal block. • Secure the cable onto the terminal block with the cable retainer.
ELECTRICAL SYSTEM INSTALLATION Outdoor Unit Electrical Connections Connecting Outdoor Unit Wiring • Verify that main power is completely off and that no power is going through the Single Zone system before proceeding with these steps. Follow all safety and warning information outlined at the beginning of this manual. Failure to do so will cause electric shock, bodily injury and / or death.
ELECTRICAL SYSTEM INSTALLATION Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Outdoor Unit Electrical Connections Connecting Outdoor Unit Wiring, continued. Figure 94: Example of Conduit. Do not install power wiring to the outdoor unit and the communication / connection (power) cable to the indoor unit in the same conduit. Use separate conduits. Communication problems will occur. 6. Using a JIS screwdriver, connect wires as shown at right.
FINAL INSTALLATION PROCEDURES Triple Leak / Pressure Test Triple Leak / Pressure Test After the refrigerant piping installation is complete, perform a triple leak / pressure test. Triple leak / pressure test is performed between the outdoor unit and indoor unit to verify that refrigerant can flow through the system without danger of leaks or pressure losses. Air and moisture that is left in the piping can lead to undesirable results and can cause damage to the system.
FINAL INSTALLATION PROCEDURES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Triple Leak / Pressure and Deep Evacuation Tests Triple Leak / Pressure Check Procedure, continued. 7. If the pressure does NOT drop for one (1) hour, the system passes the test. 8. If the pressure drops, there is a leak and it must be found. Remove the bubble solution with a clean cloth, repair the leak(s), and perform the leak / pressure check again. 9.
FINAL INSTALLATION PROCEDURES Deep Evacuation and Triple Evacuation Tests Deep Evacuation Procedure, continued. Figure 99: Evacuation Procedure Diagram. Indoor Unit 3. Evacuate to static micron level ≤500 for at least one (1) hour. 4. Micron level must remain ≤500 for two (2) hours. If the vacuum gauge rises and stops, the system may contain moisture; therefore, it will be necessary to repeat the steps of vacuum break and drying. Outdoor Unit Refrigerant Piping 5.
FINAL INSTALLATION PROCEDURES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Triple Evacuation Test Triple Evacuation Procedure Steps 1. If this procedure is performed shortly after the leak / pressure test, the cap and core on the gas (vapor) suction Schrader port must have already been removed, and the manifold must already be connected.
FINAL INSTALLATION PROCEDURES Refrigerant Trim Charge, Finishing the Job Refrigerant Trim Charge The single zone system will need an additional refrigerant charge if the installed piping lengths are greater than the “piping length (no additional refrigerant, ft.) specification” listed in the product tables. See the product sections in the engineering and installation manuals.
FINAL INSTALLATION PROCEDURES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Finishing the Job Finishing the Job After the Triple Leak and Evacuation (and refrigerant trim charge, if any) procedures have been performed, follow the steps below to open the refrigerant lines. 1. Verify that the auxiliary service port is removed (if used in the Evacuation procedure) and the original Schrader core was re-installed on the gas (vapor) suction service port. 2.
FINAL INSTALLATION PROCEDURES Reattaching the Indoor Unit Bottom Cover Reattaching the Indoor Unit Bottom Cover (HEV2, HFV3, and HXV2) Reattach the indoor unit bottom cover after all other installation procedures are complete. Figure 100: Close Up of Bottom Cover Connections (Appearances Will Vary Depending on Indoor Unit Model). Top Snaps 1. If ON, shut power OFF to the system. C-Hooks 2.
FINAL INSTALLATION PROCEDURES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Air Filter Disassembly and Assembly Air Filter Disassembly and Assembly (HEV2, HFV3, and HXV2) Air Filter Disassembly Figure 105: Disassembling the Air Filter (Appearances Will Vary Depending on Indoor Unit Model). 2. Lifting the Air Filter by the Handles. 1. Turn power off to the system. 2. Find the handles located at the top-front of the air filter molded into the plastic frame support.
FINAL INSTALLATION PROCEDURES Installing Batteries, Test Run, Performance Evaluation Installing Batteries into the Handheld Remote Controller For information on using the handheld remote controller, refer to its owner’s manual. 1. The remote controller needs two AAA (1.5V) batteries for operation. Remove the battery cover from the back of the remote controller by pushing the tab down in the direction seen at right. Figure 107: Installing the Remote Controller Batteries. Battery Cover Tab Battery Cover 2.
FINAL INSTALLATION PROCEDURES Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Installer Mode, Cooling Only Mode Installer Mode It will be necessary to switch to Installer mode if the system needs to operate in Heating Only or Cooling Only modes, or the Pump Down procedure needs to be performed. Figure 110: Using the Handheld Controller to Change System to Installer Mode. To Enter Installer Mode: 1. Press the Reset and “A” buttons.
FINAL INSTALLATION PROCEDURES Pump Down Procedure Pump Down Procedure This procedure is performed when the refrigerant piping system is serviced. Pumping down collects all the refrigerant in the outdoor unit without losing any charge. Always adhere to and be familiar with local codes regarding the handling of refrigerant. The system must operate in Cooling Only mode to proceed with the pump down procedure. If needed, refer to the previous sections for proper steps to place the unit into Cooling Only mode.
TROUBLESHOOTING Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual LG SIMS - Self Diagnosis Functions The SIMs WLAN module and the smart phone app together provide monitoring and troubleshooting capability for LG Duct Free Systems. SIMs function only with LG Duct Free products. LG SIMs can also be used with Single Zone one-to-one configurations such as the Single Zone Wall Mount systems.
TROUBLESHOOTING LG SIMS - Self Diagnosis Functions SIMs App Screens Outdoor Info/ Component Screen Displays the following information: • Frequency • FAN1 RPM • FAN2 RPM • DC Link • Current • Voltage • EEV Mode • Restart Timer • Comp Mode • EEV Displays the following information: • Frequency • Operation • THM Mode • REM Mode • FAN • EEV • Air Temp • Pipe-in • Pipe-mid • Pipe-out Displays the following information: • Inv TD • Suction • Discharge • Cond Mid • Cond Out • Heatsink • Air Temp Troubleshooting
TROUBLESHOOTING Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual Error Codes Troubleshooting Using Error Codes Refer to the table below and on the next page for error codes that are generated from the indoor and outdoor units. These codes are the most common. Your particular system might generate additional codes not listed here. Please contact LG Support if you see these types of errors and a simple power cycle has not corrected the issue.
TROUBLESHOOTING Error Codes Mega, Standard Efficiency, and Mega 115V Single Zone Wall Mounted Outdoor Unit Error Codes The Single Zone Wall Mounted outdoor unit error codes are visible on the outdoor unit, as well as from the indoor unit. However, the indoor unit error codes are only visible from the indoor unit and will not display at the outdoor unit. When troubleshooting the system, be sure to verify if the error codes that are being displayed are specific for indoor or outdoor units.
Single Zone Mega, Standard Efficiency, and Mega 115V Wall Mounted Installation Manual CAUTIONS FOR REFRIGERANT LEAKS Cautions for Refrigerant Leaks / Introduction ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required for this to occur safely. For R410A refrigerant, the maximum allowable concentration is 0.
Major Component Rough-In Description INSTALLATION CHECKLIST Single Zone outdoor unit was connected properly per local code and the product installation procedures. All literature and bagged accessories have been removed from the fan discharge. Indoor unit was installed, properly supported, and located indoors in a non-corrosive environment.
20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.
