Brochure

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For jobs small to large, look for opportunities to use LG comfort systems everywhere! Explore the many applications of LG Single and
Multi-Zone systems: whole home renovations, older system replacements, home additions, energy savings opportunities, hot or cold
zones … and many, many more!
System sizing and installation accuracy are key factors for the optimal performanace of a LG comfort system. Increased energy
efciency, customizable design aesthetics and room by room comfort control are just a few of the benets that come from a
properly installed system. Products should be installed in accordance with LG installation manuals and in compliance with applicable
state and local codes.
Below are a few of the best practices used by Excellence Contractors across the U.S. during installation:
• Leave appropriate clearances on all sides of the
indoor and outdoor units to allow for proper
airow as well as service access
• Include space for drainage to ensure condensate
ows properly out of the unit
• Units should be properly anchored to prevent
unnecessary vibrations
Additionally for indoor units:
• Keep unit away from any indoor steam or
excessive heat
• No obstacles should be placed around unit
• Do not install near a doorway or over a window
• Condensation drain should be routed away
from the indoor unit to the outside
• Use only the correct line sizes as determined by
the indoor unit
• Use only copper refrigerant piping
• Insulate both refrigerant lines independently
of each other
• Flare connections using a 45-degree flaring tool
• Consider Flaretite fittings for all connections and
torque flares to specs
• Do not exceed the maximum pipe length or install
less than the required minimum
• Do not make vertical loops in the refrigerant piping
• Support pipe runs from sagging or bending
• Quality Flaring Tool
• Digital Refrigerant Charging Scale
• Torque Wrench
• JIS Screwdriver
• Leak test with dry nitrogen to at least 550 p.s.i.
• Never use anything but soap bubbles designed for
HVAC leak testing
• Use only an approved evacuation hose for proper evacuation
and leak testing
• If possible, remove cores from system prior to starting
evacuation
• Start with fresh vacuum pump oil and evacuate to
less than 500 microns
• If refrigerant is added, use an electronic scale and
weigh in the precise amount
• Open service valves prior to energizing the unit
• Use wire that fullls or exceeds the minimum
wire requirements:
• Multi F MAX to BD unit: 14-4
• All other wiring: 14-4
• L1 and L2 are polarity sensitive on all models
• Indoor units are 208/230 volts (or 115 volt on two Mega models)
• Terminal 3 is 115 volt
• Never use wire nuts or splices in wiring
• Use non-insulated spade connectors on all terminal connections
• Use a JIS screwdriver on terminal block to avoid
stripping out the screws
• Only a dedicated electrical circuit is allowed
• Always ground indoor and outdoor unit
• Only connect one (1) end of the shielded cable if using shielded wire
*NOTE* All wiring must comply with applicable local and national codes.
Unit Placement (Indoor & Outdoor)
Piping
Charging
Wiring
• Micron Gauge
• Vacuum Pump
• High-Quality Multimeter
Installation and Service Tools:
INSTALLATION BEST PRACTICES