LG LMCN077HV Installation Manual
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LG LMCN077HV Installation Manual

Multi f; multi f max
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MULTI
MULTI
CEILING CASSETTE

INSTALLATION MANUAL

F
F
MAX

INDOOR UNIT

• LMCN077HV
7 kBtu
• LMCN097HV
9 kBtu
• LMCN125HV
12 kBtu
• LMCN185HV
18 kBtu

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Summary of Contents for LG LMCN077HV

  • Page 1: Indoor Unit

    MULTI MULTI CEILING CASSETTE INDOOR UNIT INSTALLATION MANUAL • LMCN077HV 7 kBtu • LMCN097HV 9 kBtu • LMCN125HV 12 kBtu • LMCN185HV 18 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: Table Of Contents

    Multi F MAX Refrigerant Charge Worksheet ....................65 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: Safety Instructions

    Sharp edges may 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 5 Improper piping may cause refrigerant leaks and system 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 6 Poor cable connections can cause equipment 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 To avoid physical injury, use caution when cleaning or servicing the air conditioner. 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 Keep the power switch on during the operational season. 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

    • Insulation for additional drain hose insulation lock/split washers 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 10 Part Quantity Image Grille Kit One (1) (PT-UQC) 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: 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 12: General Data

    • Refer to the Multi F Engineering Manual to properly determine total indoor unit connected capacity. 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: Specifications

    (DB) and 60ºF wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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 LMCN077HV LMCN097HV Ø3/8 Ø1/4 LMCN125HV LMCN185HV Ø1/2 Ø1/4 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: Typical Multi F/Multi F Max Systems

    B: Branch Piping (Branch Distribution Unit to Indoor Unit[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 16 Depends on the size LMU540HV of the indoor unit piping Ø3/4 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: Refrigerant Piping Requirements

    Field Supplied Refrigerant Piping Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only type that ships with yellow caps. Approved tubing for use with Multi F products will be marked “R410 RATED” along the length of the tube.

  • Page 18: General Installation Guidelines

    • Install radiant heat or another type of heating system to the floor. 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: Inspection

    Before opening the shipping container, check the container labeling to verify the unit received is the correct unit. Verify the unit capacity, type, and voltage. 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: Install Ceiling Cassette

    Uni t Si z e Ceiling 18-5/32 inches 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 Measure the unit at each corner to verify that it is level. 5. Remove the installation guide (template). 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 Drain System

    • After the test is complete, connect the flexible drain hose to the indoor unit drain port. Drain Pan 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: Refrigerant Piping

    Field-Provided Isolation Ball Valves LG maintains a neutral position on using isolation valves in VRF refrigerant piping systems. LG does not endorse any manufacturer of isola- tion valves. It is recognized that installing isolation valves may simplify future maintenance requirements, and, if used, considerations should be taken including, but not limited to, the following: •...
  • Page 24 Multi F MAX Y-Branch Kit PMBL5620 The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected to one Multi F MAX system. Field-supplied fittings are not permitted. Each Y-branch kit comes with two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers.
  • Page 25 Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed pipe;...
  • Page 26 ASTM B-88 Standards. Inches to feet conversion (12 in./ft.) 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 Anticipated Linear Expansion (LE) (inches) 1-1/2 2-1/2 3-1/2 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 A + B ~ 12" – 19" Max. 12" Max. 12" Max. 12" 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 29 Support Band Down Stop Hexagonal Nut Refrigerant Pipe 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 Insulation thickness (value in parenthesis) = 3/4 inch. 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: Piping Materials And Handling

    24 hours. 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 32: Piping Connections

    Uneven surface thickness 0.07 – 0.8 Even length 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: Idu To Odu

    Ø3/8 valve Ø1/4 12,000 Btu/h 18,000 Btu/h Ø1/2 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 34 Ø3/8 x 4 Ø3/8 x 3, Ø5/8 x 1 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 ODU Spanner Flare nut Field Piping Torque wrench 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: Piping Insulation

    • Cooling mode refrigerant temperature ranges: Liquid 75-118°F; Low Pressure Vapor 40-90°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 37 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: Electrical Wiring

    (Multi F MAX systems only) and the indoor units through the power wiring / communications 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 39: Power Wiring Specifications And Best Practices

    If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and 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 40: Controller Options

    2. Compressor will not receive the proper starting current. 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 41: Indoor Unit Electrical Connections Procedure

    Wiring / Cable 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 42 Easily connects at the four-way ceiling-cassette three (3) inch fresh air knockout hole. 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 43: Decorative Grille Kit Installation

    Insulation should fit tightly so that cool air does not 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 44: Self Diagnosis Functions

    • Unit Conversion: Converts metric values to imperial values. 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 45 • MS Office 2003, 2007 (recommended) for select reporting functions 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: Lg Sims - Self Diagnosis Functions

    Main Info Tab Help Menu (File is Factory Use Only) 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 - Outdoor Unit Electric data graph is displayed. 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: Controller Options

    3(C) CN-REMO 1(L1 ) 2(L2) To Wired Controller 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 49 2. Store a minimal amount of cable in the handy box. Any additional cable should be coiled and stored near the indoor unit control panel. 3. If additional cable length is needed, order a thirty-three (33) foot LG Wired Remote Group Control Extension cable (Model No. PZCWRC1).
  • Page 50 Hanging the Wired Controller, continued. • Connect indoor unit and wired controller using included connection cable. • Use an LG-manufactured extension cable (sold separately) if the distance between wired remote controller and the indoor unit is >32.8 feet. Figure 72: Indoor Unit to Wired Controller Connection (Controller Appearance May Vary Depending on Model Chosen).

  • Page 51: Troubleshooting

    Indoor unit BLDC motor fan lock Indoor unit middle pipe sensor error 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 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 53: Cautions For Refrigerant Leaks

    ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication. 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: Installation Checklist

    Best practice including a minimum of 20″ of straight pipe was installed between each elbow. 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 Power wiring to the indoor units and branch distribution unit(s) (Multi F MAX only) was installed per all local electrical code requirements. LG-supplied cable was used between each indoor unit and its zone controller. No cables were spliced and no wire caps are present.
  • Page 56 Major Component Rough-In Piping and Insulation Brazing Practices 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 Installation—Condensate Pump / Drain Installation Installation—Power Wire and Communications Cables 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: Pre-Commissioning Checklist

    - ________CF x 5.29 - (________) = ________ Additional Charge (lbs.) 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 59: Multi F Max Refrigerant Charge Worksheet

    - ________CF x 3.53 - (________) = ________ Additional Charge (lbs.) 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 Who to call for assistance Freight Damage and Unit Replacements Your LG Manufacturer Representative Missing Parts Your LG Manufacturer Representative Freight Damage and Unit Replacements Your LG Manufacturer Representative Received Wrong Indoor Unit Model Your LG Manufacturer Representative Installation, Startup, and Commissioning Technical Assistance 1-888-865-3026 For warranty information, visit www.lghvac.com.
  • Page 61 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. LG Customer Information Center, Commercial Products Commercial Air Conditioning Division 1-888-865-3026 USA 4300 North Point Parkway Follow the prompts for commercial A/C products and parts. Alpharetta, Georgia 30022 IM_Multi_F_CeilingCassette_9_15 www.lg-vrf.com...

This manual is also suitable for:

Lmcn185hvLmcn125hvLmcn097hv

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