Installation Manual

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Table Of Contents

SINGLE ZONE

VERTICAL AIR HANDLING UNIT

INSTALLATION MANUAL

Single-Zone Vertical Air

Handling Unit System

18,000 - 48,000 Btu/h

LV420HV (42,000 Btu/h)

LV480HV (48,000 Btu/h)

LV181HV4 (18,000 Btu/h)

LV241HV4 (24,000 Btu/h)

LV361HV4 (36,000 Btu/h)

Summary of content (74 pages)

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SINGLE ZONE VERTICAL AIR HANDLING UNIT INSTALLATION MANUAL LV181HV4 (18,000 Btu/h) LV241HV4 (24,000 Btu/h) LV361HV4 (36,000 Btu/h) Single-Zone Vertical Air Handling Unit System 18,000 - 48,000 Btu/h LV420HV (42,000 Btu/h) LV480HV (48,000 Btu/h)
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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.
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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.
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SAFETY INSTRUCTIONS INSTALLATION - CONTINUED Single Zone Vertical Air Handling Unit Installation Manual 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.
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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.
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SAFETY INSTRUCTIONS OPERATION Do not operate the disconnect switch with wet hands. 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. Single Zone Vertical Air Handling Unit Installation Manual Use a dedicated power source for this product. There is risk of fire, electric shock, physical injury or death. There is risk of fire, electric shock, physical injury or death.
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TABLE OF CONTENTS General Data �� 8 Unit Nomenclature �� 8 Specifications �� 9 Electrical.................
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GENERAL DATA Unit Nomenclature Indoor Units and Outdoor Units L V N 181 H Single Zone Vertical Air Handling Unit Installation Manual L = LG Frame Type: A: Art Cool™ S: Standard C: Four-Way Ceiling-Cassette D: Ceiling-Concealed Duct (Low Static) H: Ceiling-Concealed Duct (High Static) V: Vertical-Horizontal Air Handling N: Indoor Unit U: Outdoor Unit No N or U: System Nominal Capacity (Nominal cooling capacity in Btu/h): 18 = 18,000 42 = 42,000 24 = 24,000 48 = 48,000 36 = 36,000 System Type: H = H
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GENERAL DATA Specifications Table 1: Vertical Air Handling Unit General Data. Type Vertical Air Handling Unit System Model (Indoor Unit / Outdoor Unit) LV181HV4 (LVN181HV4/ LUU189HV) LV241HV4 (LVN241HV4/ LUU249HV) LV361HV4 (LVN361HV4/ LUU369HV) LV420HV (LVN420HV/ LUU428HV) LV480HV (LVN480HV/ LUU488HV) Cooling Capacity (Min/Rated/Max) (Btu/h) 7,200 ~ 18,000 ~ 24,000 9,600 ~ 24,000 ~ 30,000 14,400 ~ 36,000 ~ 17,000 ~ 42,000 ~ 39,000 48,000 18,000 ~ 48,000 ~ 53,000 Cooling Power Input1 (kW) 0.
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GENERAL DATA Table 2: Vertical Air Handling Unit General Data, continued. Type System (Model) (Indoor Unit / Outdoor Unit) LV181HV4 (LVN181HV4/ LUU189HV) Vertical Air Handling Unit LV241HV4 (LVN241HV4/ LUU249HV) LV361HV4 (LVN361HV4/ LUU369HV) LV420HV (LVN420HV/ LUU428HV) LV480HV (LVN480HV/ LUU488HV) Unit Data Single Zone Vertical Air Handling Unit Installation Manual Refrigerant Type3 R410A Additional Refrigerant Charge (oz./ft.) 0.
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GENERAL DATA Electrical Electrical Data Table 3: Vertical Air Handling Unit ODU Electrical Data. Nominal Tons Model Name 1.5 LUU189HV 2.0 LUU249HV 3.0 LUU369HV 3.5 LUU428HV 4.0 LUU488HV Unit Hz 60 Voltage tolerance is ±10%. Maximum allowable voltage unbalance is 2%. RLA = Rated Load Amps. Volts 208/230 Power Supply Voltage Range Min.: 187 Max.: 253 Compressor Quantity Compressor Motor RLA (Cooling) 30 1 30 1 MCA MOP 20 20 Condenser Fan Motor(s) Condenser Fan Quantity.
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GENERAL INSTALLATION GUIDELINES Location Selection Selecting the Best Location DANGER Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death. • Do not install the unit in a location where acidic solution and spray (sulfur) are often used as it can cause bodily injury or death.
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GENERAL INSTALLATION GUIDELINES Location Selection Planning for Snow and Ice, continued. 5. Design the mounting base to prevent snow accumulation on the platform in front or back of the unit frame. 6. Provide a field fabricated snow protection hood to keep snow and ice and/or drifting snow from accumulating on the coil surfaces. 7. To prevent snow and heavy rain from entering the outdoor unit, install the condenser air inlets and outlets facing away from direct winds. 8.
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GENERAL INSTALLATION GUIDELINES Oceanside Applications Single Zone Vertical Air Handling Unit Installation Manual Tie-Downs and Wind Restraints • The strength of the Single Zone system frame is adequate to be used with field-provided wind restraint tie-downs. • The strength of the roof must be checked before installing the outdoor units.
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GENERAL INSTALLATION GUIDELINES Required Outdoor Unit Clearances Minimum Clearance Requirements for Single Fan Outdoor Units Proper clearance for the outdoor unit coil is critical for proper unit operation. When installing the outdoor unit, consider service, inlet and outlet and minimum allowable space requirements as illustrated in the diagrams below. Specific clearance requirements in the diagram below are for single fan outdoor units.
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GENERAL INSTALLATION GUIDELINES Required Outdoor Unit Clearances Figure 3: Single Fan Outdoor Unit Service Access and Allowable Clearances Diagram - continued Airflow Single Unit—High Rear Wall and Low Front Wall with No Side Walls " . 20 Max LR < H LF Min. 40" Airflow H H LF LR Air ow H LF Ai ow Min. H H . 4" Min 4" Single Unit—High Rear and Side Walls with Building Overhang " . 20 Min Ai . 4" ow Min 0" .
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GENERAL INSTALLATION GUIDELINES Required Outdoor Unit Clearances Minimum Clearance Requirements for Dual Fan Outdoor Units Proper clearance for the outdoor unit coil is critical for proper unit operation. When installing the outdoor unit, consider service, inlet and outlet and minimum allowable space requirements as illustrated in the diagrams below. Specific clearance requirements in the diagram below are for dual fan outdoor units.
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GENERAL INSTALLATION GUIDELINES Rigging and Lifting Instructions Wear protective gloves and safety goggles when handling equipment. Sharp edges may cause personal injury. Dispose of the packing materials safely. Be very careful when transporting the product. There is a risk of the product falling and causing physical injury. • Use appropriate moving equipment to transport each frame; ensure the equipment is capable of supporting the weights listed. • Some products use polypropylene bands for packaging.
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GENERAL INSTALLATION GUIDELINES Outdoor Unit Platform Requirements Outdoor Unit Foundation Requirements. Figure 7: LUU189HV and LUU249HV Outdoor Units. Figure 8: LUU369HV, LUU428HV, LUU488HV Outdoor Units. Unit: Inch Unit: Inch 21-1/2 Minimum 14-9/16 Minimum 8 Minimum 24-13/32 15-3/4 7-7/8 Table 5: Outdoor Unit Foundation Specifications.
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GENERAL INSTALLATION GUIDELINES Required Indoor Unit Clearances Single Zone Vertical Air Handling Unit Installation Manual Indoor Unit Clearances Follow recommended best practices when choosing an indoor location for the single zone indoor unit. • Where there is enough structural strength to bear the weight of the unit. • Operating sound from the unit will not disturb occupants. • Include enough space for service access.
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GENERAL INSTALLATION GUIDELINES Follow all piping clearance recommendations. 1. Using a 2-5/8” hole core drill bit, drill a hole at the selected location. Avoid obstructions in the wall such as electrical wires or conduits and water or gas pipes. • The slant of the hole must be 3/16” to 5/16” from level with the slant being upward on the indoor unit side and downward on the outdoor unit side. 2. Finish off the newly drilled hole as shown with bushing and sleeve covering.
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GENERAL INSTALLATION GUIDELINES Horizontal Right Installation Single Zone Vertical Air Handling Unit Installation Manual Configuring the VAHU for Horizontal Right Installation The 4-way Vertical Air Handling Unit is factory ready for vertical up or horizontal left installation. Horizontal right installation requires field reconfiguration of the indoor unit. The internal drain pan must be removed from the left side of the unit and reinstalled on the right side.
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GENERAL INSTALLATION GUIDELINES Vertical Downflow Installation Configuring the VAHU for Vertical Downflow Installation Figure 16: Remove Front Panels and Supports. General Installation Guidelines The 4-way Vertical Air Handling Unit is factory ready for vertical up or horizontal left installation. Vertical down installation requires field reconfiguration of the indoor unit. For vertical down, the downflow conversion kit is required.
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GENERAL INSTALLATION GUIDELINES Vertical Downflow Installation Single Zone Vertical Air Handling Unit Installation Manual Vertical Downflow Installation - continued 6. Install the conversion kit left and right rear vertical brackets in the rear corners of the cabinet (Figure 20). 7. Position the rear horizontal bracket on the two vertical brackets and secure with screws (Figure 21). 8. Position the left and right horizontal side brackets and secure with screws (Figure 21).
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GENERAL INSTALLATION GUIDELINES Vertical Downflow Installation Vertical Downflow Installation continued Figure 24: Reinstall Support Bracket. Figure 25: Wiring Ring. Figure 26: Pipe Support Bracket. Cabinet Support Bracket 13. Reinstall the cabinet support bracket (Figure 24). 14. Reinstall the plastic wiring ring and route the sensor wires through the ring (Figure 25). 15. Reinstall the refrigerant pipe support bracket (Figure 26). 16. Reinstall the pipe in and pipe out sensors (Figure 27). 17.
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GENERAL INSTALLATION GUIDELINES Installing Ductwork Single Zone Vertical Air Handling Unit Installation Manual Installing Ductwork Install ductwork to the 4-way Vertical Air Handling Unit as required for your system. Some general guidelines are: • Use more than 10 screws to join the supply duct to the VAHU. • Seal all duct work according to local codes to prevent air leakage. Ensure that filter access is unobstructed.
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REFRIGERANT SAFETY STANDARDS / DEVICE CONNECTION LIMITATIONS Refrigerant Safety Standards Connection Limitations Single zone systems consist of one outdoor unit and one indoor unit. One of the most critical elements of a single zone system is the refrigerant piping. Table 6 lists the pipe length limits that must be followed in the design of a Single Zone VAHU refrigerant pipe system.
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SELECTING FIELD SUPPLIED PIPING Selecting Field-Supplied Copper Piping Single Zone Vertical Air Handling Unit Installation Manual 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.
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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. If the pipe is mounted in free air space, no natural restriction to movement is present if mounting clamps are properly spaced and installed.
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COPPER EXPANSION AND CONTRACTION Single Zone Vertical Air Handling Unit Installation Manual Table 10: Linear Thermal Expansion of Copper Tubing in Inches. Pipe Length1 10 20 30 40 50 60 70 80 90 100 120 140 160 180 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.
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PIPING HANDLING Piping Materials and Handling Keep Pipes Capped While Storing. 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. No moisture should be inside the piping. Moisture Possible - Significant hydrolysis of refrigerant oil. Problems - Refrigerant oil degradation. - Poor insulation of the compressor.
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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. Single Zone Vertical Air Handling Unit Installation Manual LG Electronics U.S.A.,Inc.
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REFRIGERANT SYSTEM ENGINEERING Obstacles Figure 34: Installing Piping Above and Below an Obstacle. 3X MINIMUM X X 3X MINIMUM Above an obstacle Below an obstacle Pipe Supports Figure 35: Pipe Hanger Details. A properly installed pipe system must be adequately supported to avoid pipe sagging. Sagging pipes become oil traps that lead to equipment malfunction. Pipe supports must never touch the pipe wall; supports shall be installed outside (around) the primary pipe insulation jacket.
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REFRIGERANT SYSTEM ENGINEERING Pipe Sleeves at Penetrations LG requires 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.
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FLARING AND BRAZING PROCEDURES Flaring and Brazing Procedures One of the main causes of refrigerant leaks is a defective connection. 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. Do not use kinked pipe caused by excessive bending in one specific area on its length. • Flaring Procedure 1. Cut the pipe to length.
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FLARING AND BRAZING PROCEDURES Tightening the Flare Nuts Single Zone Vertical Air Handling Unit Installation Manual 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 1. When connecting the flare nuts, coat the flare (outside only) with polyvinyl ether (PVE) refrigeration oil only.
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REFRIGERANT PIPING CONNECTIONS Installation Overview Installation Single Zone Vertical Air Handling Unit systems are one-to-one systems. There is a direct piping connection between the outdoor unit and the indoor unit. Refer back to the tables within the “Connection Limitations” section for specific length limitations in conjunction with outdoor unit and indoor unit positioning. Pipe Bundling See the figure at right for proper pipe and cable bundling.
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REFRIGERANT PIPING CONNECTIONS Directional Pipe Formation Special Applications Figure 41: Bundling and Taping. If an additional drain hose is necessary, the end of drain outlet must be routed above the ground. Secure and the drain hose appropriately. Single Zone Vertical Air Handling Unit Installation Manual When the Outdoor Unit is Installed Below the Indoor Unit: 1.
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REFRIGERANT PIPING CONNECTIONS Outdoor Unit Connections Outdoor Unit Connections 1. Remove the ODU front panel by loosening the fastening screws. Figure 43: LUU369HV, LUU428HV, LUU488HV Outdoor Unit Piping Connection 2. Align the center of the refrigerant piping and corresponding connection as shown. 3. Refer to the figures at right for liquid and gas piping attachments onto the outdoor unit. Liquid Vapor Refrigerant Piping Connections 4.
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REFRIGERANT PIPING CONNECTIONS Indoor Unit Connections Piping to Indoor Unit Do not braze in an enclosed location. Do not allow the refrigerant to leak during brazing. Always test for gas leaks before and after brazing. If the refrigerant combusts, it generates a toxic gas that may cause physical injury or death. 1. Joints are brazed in the field.
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REFRIGERANT PIPING CONNECTIONS Drain Hose Indoor Unit Drain Hose Guidelines Refer to the diagrams below and follow proper installation and the running of the drain hose along the pipe installation line to avoid leakage. Once drain hose is set in place, always follow with evacuation and leakage testing of all piping to be sure all piping is properly sealed. Re-check and retest as necessary.
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REFRIGERANT PIPING CONNECTIONS Bundling and Cutting Line Figure 51: Typical Drain Pan Installation. Indoor Unit Drain Pan 1. Install a drain pan if required by local code. 2. Figure 51 shows typical drain pan installation. Vertical Upflow Horizontal Left Checking the Indoor Unit Drain Hose for Leaks 1. Pour a glass of water on the evaporator. 2. Verify that the water flows appropriately through and out of the drain hose of the indoor unit without any leaks.
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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.
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INSULATION Single Zone Extended Piping Wall Mounted Installation Manual 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.
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ELECTRICAL SYSTEM INSTALLATION General Information and Safety Guidelines • Consider ambient conditions (temperature, direct sunlight, inclement weather, etc.) when selecting, installing, and connecting the power wiring. • Properly ground the Single Zone outdoor and indoor unit. Improperly connected ground wire can cause communication problems from electrical noise and motor current leakage. Ground wiring must always be installed by a qualified technician.
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ELECTRICAL SYSTEM INSTALLATION Single Zone Vertical Air Handling Unit Installation Manual Power Wiring Specifications and Best Practices Power Wiring / Communication Cable Connections Figure 59: Close up of a Typical Ring Terminal. Best practice dictates using solderless ring or fork terminals at all power wiring and communication cable terminations. Use copper bearing ring or fork terminals; do not use galvanized or nickel plate over steel.
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ELECTRICAL SYSTEM INSTALLATION Power Supply / Power Wiring Specifications From Outdoor Unit To Indoor Unit GN per local codes. Refer to Electrical Data table for ampere ratings. Properly size all circuit breakers / fuses, wiring and field provided components /YL There is risk of fire, electric shock, explosion, physical injury or death.
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ELECTRICAL SYSTEM INSTALLATION " 1/8 "± /16 7 Power Wiring, Ground to Outdoor Unit GN / Single Zone Vertical Air Handling Unit Installation Manual YL Communication / Connection (Power) Cable Specifications from Outdoor 13/ Unit to Indoor Unit 1 • For communication / connection (power) wires between the Single Zone outdoor unit and the indoor unit, use a minimum 18 gauge, four (4) conductor, stranded, shielded or unshielded wire.
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ELECTRICAL SYSTEM INSTALLATION Wall Controller Installation Controller Options Vertical Air Handling indoor units do not include a wired controller. Optional LG-supplied wired controllers are available. The wireless handheld controller (Model No. PQWRHQ0FDB) is also an optional accessory with use of the wired controller. • • • • • Operation Display Panel: Displays operation conditions. Temperature Control Button: Sets desired temperature. Fan Speed Button: Sets desired fan speed.
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ELECTRICAL SYSTEM INSTALLATION External Static Pressure Setting Values External Static Pressure (ESP) Default Settings (NJ frame) Table 17: ESP Setting Values (NJ frame). Single Zone Vertical Air Handling Unit Installation Manual Model Number Air Volume* High Medium Low LVN181HV4 640 580 480 LVN241HV4 710 640 480 LVN361HV4 990 880 800 *Installer settings available to change the CFM to 10% above or 10% below the values mentioned in the above table.
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ELECTRICAL SYSTEM INSTALLATION External Static Pressure Setting Values External Static Pressure Setting Values (NK frame) Figure 70: ESP Setting Values (NK frame). Electrical System Installation IDU External Static Pressure Setting Values Table 18: Vertical Air Handling Unit Indoor Unit External Static Pressure and Air Flow Tables. Static Pressure (in. wg) Model No. / Nominal Capacity of System (Btu/h) LVN420HV / 42,000 LVN480HV / 48,000 0.1 0.2 0.3 0.4 Airflow Rate / CFM 0.5 0.6 0.7 0.8 0.
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ELECTRICAL SYSTEM INSTALLATION Indoor Unit Electrical Connections Connecting Indoor Unit Electrical Wiring Single Zone Vertical Air Handling Unit Installation Manual • Verify that main power to the unit is completely off before proceeding with these steps as there is a risk of electrical shock and bodily injury. • Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so may cause bodily injury.
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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 may cause electric shock, bodily injury and / or death.
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ELECTRICAL SYSTEM INSTALLATION Indoor Unit Wiring Diagram LVN181HV4, LVN241HV4, LVN361HV4 Wiring Diagram for LVN181HV4, LVN241HV4, LVN361HV4 Single Zone Vertical Air Handling Unit Installation Manual Figure 76: Indoor Unit Wiring Diagram. 7.19 54 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION Indoor Unit Wiring Diagram LVN420HV, LVN480HV Wiring Diagram for LVN420HV, LVN480HV Figure 77: Indoor Unit Wiring Diagram. Electrical System Installation Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION Outdoor Unit Wiring Diagram LUU189HV Wiring Diagram for LUU189HV Single Zone Vertical Air Handling Unit Installation Manual Figure 78: Outdoor Unit Wiring Diagram. 7.19 56 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION Outdoor Unit Wiring Diagram LUU249HV Wiring Diagram for LUU249HV Figure 79: Outdoor Unit Wiring Diagram. Electrical System Installation 7.19 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION Outdoor Unit Wiring Diagram LUU369HV Wiring Diagram for LUU369HV Single Zone Vertical Air Handling Unit Installation Manual Figure 80: Outdoor Unit Wiring Diagram. 7.19 58 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION Outdoor Unit Wiring Diagram LUU428HV, LUU488HV Wiring Diagram for LUU428HV, LUU488HV Figure 81: Outdoor Unit Wiring Diagram. Electrical System Installation Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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ELECTRICAL SYSTEM INSTALLATION NJ, NK Wiring Diagrams Legend Table 19: NJ/NK Frame Wiring Diagram Legend.
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ELECTRICAL SYSTEM INSTALLATION NJ/NK Chassis DIP Switch Settings DIP Switch Settings for Indoor Unit PCB Table 20: NJ/NK Frame DIP Switch Settings. Dip Switch Function Off On Description COMMUNICATION Off (default) _ _ SW2 CYCLE Off (default) _ _ SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master/ Slave on each indoor unit. SW4 DRY CONTACT MODE Variable Auto Sets operation mode for optional Dry Contact accessory. 1.
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FINAL INSTALLATION PROCEDURES Triple Leak / Pressure Check Triple Leak / Pressure Check Single Zone Vertical Air Handling Unit Installation Manual After the refrigerant piping installation is complete, perform a triple leak / pressure test. Triple leak / pressure test is performed between the indoor and outdoor unit to verify that refrigerant can flow through the system without danger of leaks or pressure losses.
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FINAL INSTALLATION PROCEDURES Triple Leak / Pressure and Evacuation Procedures Triple Leak / Evacuation 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.
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FINAL INSTALLATION PROCEDURES Triple Evacuation Procedure Triple Evacuation Procedure Steps, continued. Single Zone Vertical Air Handling Unit Installation Manual After the vacuum pump is first operated, if hoses, manifold, and vacuum valves are leak free (and oil is not moisture laden), the gauge must read <100 microns within one (1) minute. Do not proceed if the gauge does not read <100 microns within one (1) minute.
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FINAL INSTALLATION PROCEDURES Trim Charge, Test Run Refrigerant Trim Charge The single zone system may 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. The additional refrigerant charge can be calculated manually using the information in the engineering and /or installation manuals, or by LATS. 1.
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FINAL INSTALLATION PROCEDURES Pump Down, Cooling Only Mode Single Zone Vertical Air Handling Unit Installation Manual Pump Down Procedure This procedure is performed when the refrigerant piping system is serviced. Pumping down pushes all the refrigerant into 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.
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TROUBLESHOOTING 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 functions only with LG Duct Free products. LG SIMs can also be used with Single Zone one-to-one configurations such as the Single Zone VAHU systems. SIMs can display and graph operational data for the air conditioner system including the indoor unit and the outdoor unit.
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TROUBLESHOOTING LG SIMS - Self Diagnosis Functions SIMs App Screens Outdoor Info/ Component Screen Single Zone Vertical Air Handling Unit Installation Manual Displays the following information: • Frequency • FAN1 RPM • FAN2 RPM • DC Link • Current • Voltage • EEV Mode • Restart Timer • Comp Mode • EEV Indoor Info Tab Displays the following information: • Frequency • Operation • THM Mode • REM Mode • FAN • EEV • Air Temp • Pipe-in • Pipe-mid • Pipe-out 68 Outdoor Info/ Temperature Screen Displays the
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TROUBLESHOOTING Error Codes Troubleshooting Using Error Codes Refer to the table below and on the next two pages 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. Error Codes • Refer to the figure below for your particular indoor unit’s LED configuration.
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TROUBLESHOOTING Error Codes Single Zone 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.
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CAUTIONS FOR REFRIGERANT LEAKS 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 0.026 lbs./ft3 per 1,000 ft3 of air in an occupied space.
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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.
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NOTES
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20001747 ISO 9001: 2008 LG ELECTRONICS INC. For further technical materials such as submittals, engineering manuals, service manuals, and catalogs, visit www.lghvac.com. LG Electronics, U.S.A., Inc. Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta, Georgia 30022 www.lg-vrf.