9
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.  
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INTRODUCTION
Multi F and Multi F MAX Standard 
Wall-Mounted Units
This manual describes how to install the LG Multi F and Multi F MAX 
(Multi Zone) Standard Wall-Mounted Indoor Units (IDU) for Multi 
F heat pump systems. Table 1 lists the available models. Refer to 
LG’s Multi F Indoor Unit Engineering Manual for complete detailed 
engineering data and selection procedures.
Safety
Safety of personnel is the primary concern during all 
procedures. Read and understand the safety summa-
ry at the front of this manual. Read and understand 
this installation procedure before beginning instal-
lation. Use the appropriate tools and accessories 
during installation. Plan your work and do not work 
alone, if possible. Know how to obtain emergency 
medical and fire fighting assistance.
Installation Personnel
This equipment is intended for installation by personnel trained 
in the required construction, mechanical, electrical, and/or other 
disciplines.
Applicable Codes
Personnel must be familiar with and follow the applicable national, 
state, and/or local codes. In the event of a conflict between any 
applicable code and the instructions in this manual, comply with the 
applicable code.
•  Connecting cable (power and control)
•  Pipes - vapor line and liquid line, with 
insulation
•  3/8” or 1/2” Threaded hanger rods
•  3/8” or 1/2” nuts, at washers, and 
lock/split washers
•  Insulated drain hose
•  Additional drain hose
•  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
Installation work must be performed by trained personnel and in  
accordance with national wiring standards and all local or other  
applicable codes. Improper installation can result in re, electric shock, 
physical injury, or death.
Note:
Please read all instructions before installing this product. Become familiar 
with the unit’s components and connections, and the order of installation. 
Incorrect installation can degrade or prevent proper operation.
Figure 1:  Typical Multi F Standard Wall-Mounted Indoor Unit
Required Tools (field provided)
Required Parts (field provided)