LG LMU481HV - Manuals - manualsarea.com

Page 2 - Safety Instructions - Installation; Multi F / Multi F MAX Air-Source System Install Tips; Safety Instructions - Wiring

2 Safety Instructions - Installation Multi F / Multi F MAX Air-Source System Install Tips The following pages present an overview of Multi F / Multi F MAX air-source Variable Refrigerant Flow (VRF) installation concepts, and isintended to supplement the technical and installation information provide...

Page 3 - Clearances; NOTE

3 Clearances LG Multi F / Multi F MAX air-source units are engineered to beinstalled outdoors. These outdoor units require sufficient space toensure proper airflow, operation, and maintenance / serviceaccess. When installing outdoor units, allowable service, inlet,outlet, and space requirements MUST...

Page 4 - Mounting Options; Tools

4 Mounting Options After an installation area for the outdoor unit(s) is chosen, verify:• The floor surface / chosen location has enough strength to support the weight of the unit(s) and base. • There is enough space for piping and wiring (when installed through the bottom of the unit [Multi F MAX o...

Page 5 - Piping; Do not install Y-branches; Indoor Unit Y-Branch Horizontal Configuration.

5 Piping Multi F MAX outdoor units have one set (one vapor and one liquid)of flare-type connections. Field-installed piping links the outdoorunit connections to a branch distribution unit. If installing two (2)branch distribution units in parallel on one (1) Multi F MAX outdoorunit, an LG-supplied Y...

Page 6 - Wiring; WARNING

6 Piping SupportsA properly installed piping system is adequately supported to avoidpiping sags (sagging pipes become oil traps that lead to equipmentmalfunction).Field-provided piping supports must be designed to meet localcodes. As necessary, place supports closer for segments wheresagging couldpo...

Page 7 - Final Installation Procedures

7 Wiring • Ensure the power wiring / communication cable shield (if shielded) from the outdoor unit to the indoor units / branchdistribution units is properly grounded to the outdoor unitchassis only. Do not ground at any other point. Wiring must comply with all applicable local and national codes. ...

Page 9 - Installation Checklist

9 Installation Checklist Major Component Rough-In Description Check Multi F / Multi F MAX outdoor units are connected properly per local code and the product installation procedures.All literature and bagged accessories have been removed from the fan discharge (ducted and cassette model indoor units...

Page 10 - Power Wire and Communications Cables

10 Installation Checklist Power Wire and Communications Cables Description Check Ground wire was installed and properly terminated at the outdoor unit(s).Power wiring was connected to a single phase 208-230V source.The power supplied was clean with voltage fluctuations within specifications (±10% of...

Page 12 - US

* The following mark and paragraph should be applicable only to the Energy Star certification models. IMPORTANT - This product has been designed and manufactured to meet ENERGY STAR criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and p...