LG MULTI F Installation Manual
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LG MULTI F Installation Manual

LG MULTI F Installation Manual

Convertible mid-static ducted indoor unit
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MULTI
MULTI
MID-STATIC DUCTED
INSTALLATION MANUAL
F
F
MAX
CONVERTIBLE
INDOOR UNIT
• LHN098HV1
9 kBtu
• LHN128HV1
12 kBtu
• LHN188HV1
18 kBtu
• LHN248HV1
24 kBtu

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Summary of Contents for LG MULTI F

  • Page 1 MULTI MULTI CONVERTIBLE MID-STATIC DUCTED INDOOR UNIT INSTALLATION MANUAL • LHN098HV1 9 kBtu • LHN128HV1 12 kBtu • LHN188HV1 18 kBtu • LHN248HV1 24 kBtu...
  • Page 2 For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice. ©LG Electronics U.S.A., Inc. This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

  • Page 3: Safety Instructions

    Wear protective gloves when handling equipment. Sharp edges will cause personal injury. 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.
  • Page 4 Do not run the compressor with the service valves closed. There is a risk of equipment damage. 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.
  • Page 5 Poor cable connections can cause equipment malfunction. result in equipment malfunction and property damage. 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.
  • Page 6 Do not block the inlet or outlet. Unit will malfunction. 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.

  • Page 7: Table Of Contents

    Troubleshooting / Error Codes....................................58-59 Installation Checklist....................................... 60-62 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.

  • Page 8: Unit Nomenclature

    • All indoor units are compatible with wired controllers 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.

  • Page 9: Introduction

    Mid-Static Ducted Indoor Unit. Mid-Static Ducted Units This manual describes how to install the LG Multi F and Multi F MAX (Multi Zone) Convert- ible Mid-Static Indoor Units (IDU) for Multi F heat pump systems. The table below lists the available models. Refer to LG’s Multi F Indoor Unit Engineering Manual for complete detailed engineering data and selection procedures.
  • Page 10 Fittings For Vapor Piping For Liquid Piping 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.
  • Page 11 When installing the mid-static ducted indoor unit vertically, the mesh steel provided MUST be installed to avoid injury from moving parts. 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.

  • Page 12: General Data

    551 psi design pressure of R410A. Inadequate piping will fail when pressurized. 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.
  • Page 13 This unit comes with a dry helium charge. 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.

  • Page 14: Dimensions

    Dimensions Figure 4: LHN098HV1, LHN128HV1, LCN188HV1, LHN248HV1 Dimensions. 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.

  • Page 15: Refrigerant Piping Diagram

    *Refer to Table 12 for LHN248HV1 socket connections. 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.

  • Page 16: Installation

    If damage is found, repack the unit as it was received in the original container. 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.

  • Page 17: Indoor Unit Location Selection

    • If the unit is installed near a body of water, the installation parts are at risk of corroding. Appropriate anti-corrosion methods must be taken for the unit and all installation parts. 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.

  • Page 18: Indoor Unit Bolt Locations For Horizontal Installation

    1-3/16 9-21/32 7/32 29-1/16 6-15/16 35-7/16 1-15/32 27-9/16 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.

  • Page 19: Required Service Space / Prepare For Horizontal Install

    • Ensure the frame is installed on a level plane. Incorrectly installed units can result in degraded performance or an inoperative unit/system. 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.

  • Page 20: Hanging The Indoor Unit For Horizontal Installation

    4. Mid-static indoor units are equipped with a drain, therefore, the unit must be installed properly or condensate will drip out and cause prod- uct malfunction and / or property damage. 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.

  • Page 21: Vertical Installation

    (M10 / L100, Four [4] Each) (Field Supplied) 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.

  • Page 22: Installing For Condensate Drainage / Drilling Piping Hole

    • See the Electrical Connections section of this manual for information on conduit / electrical wiring to the indoor unit. 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.

  • Page 23: Vertical Conversion Kit Installation

    Hooks (Four [4] Each) Step 5B. Pre-filter Pre-filter Metal Mesh 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.

  • Page 24: Vertical Conversion Kit Wiring

    Fire and electrical shock can cause physical injury or death. 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.

  • Page 25: Changing The Inlet Position

    Air Inlet Back / Bottom Air Outlet Panel Pre-Filter 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.

  • Page 26: Indoor Unit Connections

    • See the Electrical section for more information. 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.
  • Page 27 Pipe Sleeve Insulation Material Min. 14 Gauge Power/Communication Cable 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.

  • Page 28: Flaring Procedure

    Flaring Procedure Flaring Procedure One of the main causes of refrigerant leaks is a defective connection. For LG HVAC systems, the installer needs to know how perform flared 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.
  • Page 29 Always use two (2) wrenches to loosen the flare nuts. 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.

  • Page 30: Outdoor Unit To Indoor Unit Connections

    18,000 Btu/h Ducted and Four-Way Cassette 24,000 Btu/h Wall-Mounted 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.
  • Page 31 Unit Connection Socket For connections to regular Multi F and Multi F MAX outdoor unit systems, see the Multi F / Multi F MAX Installation Manual. Due to our policy of continuous product innovation, some specifications may change without notification.
  • Page 32 24 KBtu/h Wall-Mounted and Ducted Indoor Units) 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.
  • Page 33 4. When all piping installation has been completed, perform the triple leak / pressure and evacuation tests (see the Final Installation Procedures Section in the Multi F / Multi F MAX or Multi F / Multi F MAX LGRED Outdoor Unit Installation Manual), verify that the system does not have any leaks, and then fully insulate all joints / connections.
  • Page 34 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.

  • Page 35: Condensate Piping Installation

    Position snugly against the indoor unit frame. NOTE tion and / or leak. 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.

  • Page 36: Vertical Condensate Piping / Common Drain System

    Condensate can be drained either directly outside or to a common drain system. For more information regarding the common drain system, see below or the Multi F / Multi F MAX with LGRED Outdoor Unit Engineering Manual or the regular Multi F / Multi F MAX Outdoor Unit Engineering Manual.

  • Page 37: General Installation Guidelines

    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.

  • Page 38: Refrigerant Piping

    Ensure that No Gaps are Present Insulation (Field Supplied) NOTE 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.

  • Page 39: Insulating Refrigerant Piping

    3/8 inch thick EPDM insulation that is plenum-rated with a heat-resistance factor of more than 248°F. 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.

  • Page 40: Wiring

    • Properly ground the outdoor, indoor, and branch distribution units (Multi F MAX Standard or LGRED systems only). Ground wiring is re- quired to prevent accidental electrical shock during current leakage.

  • Page 41: Power Wiring / Communication Cable Connections

    Improperly grounding this cable can cause communications errors. 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.
  • Page 42 Do not include splices or wire nuts in the communication cable. • Multi F and Multi F MAX (Standard or LGRED) systems operate at 1Ø, 208-230V, 60Hz, and power is wired to the outdoor unit only. The outdoor unit will supply power to the indoor units and the branch distribution units (Multi F MAX [Standard or LGRED] systems only) through the communication / connection (power) cable (indoor units and branch distribution units draw minimum power).
  • Page 43 Ground Wiring Ground Wiring Outdoor Unit Outdoor Unit 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.
  • Page 44 Wiring must comply with all applicable local and national codes. • If using the LG supplied cable and the length needs to be extended, the LG Extension Kit (sold separately) must be used. A maximum of four (4) kits (up to 165 feet) can be used.
  • Page 45 • Selection of operation options (operation/mode/set temperature) • Control of air flow rate (High/Medium/Low) 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.

  • Page 46: Wired Controller 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.
  • Page 47 / inside the controller. of the Bent Cable Attaching the Cable 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.
  • Page 48 • If using the back, route the communications cable through the handy box or wall, and through the large hole in the installation plate. • If the distance between the controller and the indoor unit is more than 32 feet (9.75 m), use an LG Extension Cable (sold separately).

  • Page 49: Indoor Unit Electrical Connections

    6. Reinstall the metal control box by reattaching it with its two (2) screws. 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.
  • Page 50 BDU: 1(L1 ) 2(L2) ODU: 3 or S 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.
  • Page 51 If a conduit is not used, see pages in the “Refrigerant Piping Connections” for refrigerant piping, condensate drain, power wiring / communication cable bundling information. 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.

  • Page 52: Final Installation Procedures

    Installer Setting Mode sets system functions. Only trained and licensed HVAC technicians should access / use the Installer Setting Mode. If any installation procedure or system change is performed by someone other than a trained and licensed HVAC technician, LG is not respon- sible for the results, and it will void the warranty.

  • Page 53: Setting The External Static Pressure

    (External static pressure values are saved to system memory before the changes are implemented). 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.
  • Page 54 • Table data is based at 230V. Air flow rate varies according to voltage fluctuation. 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.
  • Page 55 • A sub-setting that isn’t recognized by the indoor unit will revert to the default setting. • The controller will display all sub-settings if the function is available for the indoor unit. Contact an LG Representative for details. FC-35 (Thermo Off - Indoor Unit Fan Table 24: Wired Controller Settings FC-35 Set Codes and Displays.
  • Page 56 56:00 Standby FC-56 setting Mode Function On 56:01 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.

  • Page 57: Lhn098-248Hv1 Indoor Unit Dip Switch Settings

    When the outdoor unit is in defrost mode, the fan will operate at super low fan speed. 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.

  • Page 58: Troubleshooting / Error Codes

    These codes are the most common that will manifest through these units. The system installed might generate additional codes not listed here. Contact an LG trained service provider if these types of errors are seen, and a simple power down and boot up has not corrected the issue.
  • Page 59 Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and workarounds. 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.

  • Page 60: Installation Checklist

    Pipe insulation was not compressed at any point. Y-branch fittings were properly INSTALLED per details provided in the Multi F / Multi F MAX (Standard or LGRED) Outdoor Unit Installation Manual. Y-branch fittings were properly SUPPORTED per details provided in the Multi F / Multi F MAX (Standard or LGRED) Outdoor Unit Installation Manual.
  • Page 61 The power supplied was clean with voltage fluctuations within specifications. (±10% of nameplate). Power wiring to the Multi F / Multi F MAX (Standard or LGRED) outdoor unit was field supplied, solid or stranded, and installed per all local, state, and NEC requirements.
  • Page 62 For further technical materials such as submittals, engineering manuals, service manuals, and catalogs, visit www.lghvac.com. LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 New Issue: IM_Multi_F_Mid-Static_Ducted_11_23 www.lghvac.com...

This manual is also suitable for:

Multi f maxLhn098hv1Lhn128hv1Lhn188hv1Lhn248hv1

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