LGRED Heat LMU300HHV Installation Manual

67
Electrical System Installation
Due to our policy of continuous product innovation, some specifications may change without notification.
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1. Detach the outdoor unit panels by loosening the screws.
2. Remove the control cover (if applicable) by loosening the screws.
3. Remove the conduit knock outs or access holes.
4. Pull the power wiring, and the communications / connection (power) cable into the
outdoor unit (through the conduits, if applicable). Ensure there is enough length to
connect to the terminals on the outdoor unit. Secure any conduits with field-supplied
lock nuts.
5. Connect the power wiring, and the communications / connection (power) cable to the
correct terminals on the outdoor unit.
6. Connect communications / connection (power) cable to the correct control board
terminals on the indoor unit (or branch distribution unit[s] if Multi F MAX with LGRED
system).
7. Follow the wiring diagrams on the outdoor unit and indoor units (or branch distribu-
tion unit[s]) control covers. Ensure that the terminal board numbers and wiring color
on the outdoor unit matches the terminal number and wiring color on the indoor unit
or branch distribution unit(s).
8. Provide strain relief and help protect the connections by (separately) securing the
wiring / cable to the outdoor unit with the factory-supplied clamps (up to 35 lbs.).
Clamps are included near the terminal block. Zip ties can also be used to hold all
cables in place.
9. For more installation information for specific indoor units, refer to the separate
indoor unit installation manuals on www.lghvac.com.
10. When all connections are complete, reattach the control cover to its original position
using the screws, then reinstall the outdoor unit panel.
11. After installation is complete, seal any gaps around the wiring in the panel access
holes or the conduits.
PowerPower Wiring
Conduit
Hole
Communication /
Connection (Power) Cable
(To Indoor Units)
Figure 88: Multi F with LGRED Outdoor Unit Wiring
Connections (LMU300HHV Example).
Figure 89: Multi F MAX with LGRED Outdoor Unit
Wiring Connections Close Up View (LMU300HHV
Example).
Power Wiring Terminal
Communication / Connection
(Power) Cable Terminal (To
the Indoor Units / Branch
Distribution Units)
Cable Clamp
Cable Clamp
* Make sure rubber bushings are
properly installed in the knock-out holes
after connecting the main power wiring.
Figure 90: Multi F MAX with LGRED Outdoor Unit
Wiring Connections (LMU360HHV Example).
Lock Nut
(Field Supplied)
Indoor Unit A
Conduit
(Field Supplied)
Indoor Unit B
Indoor Unit C
Indoor Unit D
Conduit
Hole
Power Wiring
(1Ø, 208/230V)
Communication /
Connection (Power)
Cable (1Ø, 208/230V)
• Always have a trained technician properly ground the outdoor unit. If the outdoor unit
is not properly grounded, there is a risk of electric shock, physical injury, or death.
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• Failure to properly provide a NEC-approved earth ground can result in electric shock,
fire, physical injury or death.
• Comply with local and national codes while running the wire from the indoor unit (and
branch distribution units if Multi F MAX with LGRED system) to the outdoor unit (size
of wire and wiring method, etc). Incorrectly sized wiring will cause the terminal to
overheat, generate a fire, and risk physical injury or death.
• All wiring / cable must be firmly connected to its terminals. Loose wiring will cause the
terminal to overheat, generate a fire, and risk physical injury or death.
•
Do not allow the wiring / cable to touch refrigerant tubing, the compressor, or any
moving parts. It can result in electric shock, fire, physical injury or death.
• Replace all control box and panel covers. If cover panels are not installed securely,
dust, water and animals may enter the outdoor unit, causing fire, electric shock, and
physical injury or death.
• Ensure the communications / connection (power) cable from the outdoor units to the
indoor / branch distribution units, and the power wiring to the outdoor unit are sepa-
rate; otherwise, the outdoor unit operation will be affected by electrical noise and will
malfunction or fail.
• The communications / connection (power) cable from the outdoor unit to the indoor
/ branch distribution units must be separated and isolated from power wiring to the
outdoor unit, computers, elevators, radio and television broadcasting facilities, as well
as medical imaging equipment; otherwise, the outdoor unit operation will be affected
by electrical noise and will malfunction or fail.
• All wiring / cable must be firmly connected to its terminals. Loose wiring will result in
unit malfunction.
ELECTRICAL
Installation