LMCN078HV Engineering Manual

Power Wiring (208-230V) and Communications Cable Details
ELECTRICAL CONNECTIONS
Figure 271:Multi F MAX with LGRED LMU360HHV and LMU420HHV System Power Wiring and Communications Cable Connections.
1(L1) 2(L2)
1(L1) 2(L2) 1(L1) 2(L2) 1(L1) 2(L2) 1(L1) 2(L2)
1(L1) 2(L2)
S
S S S S
1(L1) 2(L2) 1(L1) 2(L2) 1(L1) 2(L2) 1(L1) 2(L2)
Indoor Unit Terminal Block
3 3
Outdoor Unit Terminal Block
L
L
N
N
G
Power Supply
Outdoor Unit
Main Switch
Circuit Breaker
Three-wire Power Wiring
(Including Ground)
Fuse
* Same Wiring as Branch Distribution Unit (A)
S
Branch Distribution Unit (B)
3 3
COMMUNICATIONS CABLE
POWER WIRING
L1 L2
Branch Distribution Unit (A)
Indoor Unit Terminal Block Indoor Unit Terminal Block Indoor Unit Terminal Block
3(A)1(L1) 2(L2)
3(B)
• All field-supplied wiring, components, sizes, and materials must comply with all applicable national, state, and local codes and requirements.
Improper wiring will result in fire, electric shock, physical injury or death.
• Ground wiring is required to prevent accidental electrical shock during current leakage, communication problems from electrical noise, and
motor current leakage. Do not connect the ground line to the pipes. There is a risk of fire, electric shock, explosion, physical injury or
death.
• Install a main shutoff switch or circuit breaker that interrupts all power sources simultaneously. There is a risk of fire, electric shock, explosion,
physical injury or death.
• All field-supplied wiring, components, sizes, and materials must comply with all applicable national, state, and local codes and requirements.
Failure to install proper electrical components can result in property damage and equipment malfunction.
• Ground wiring is required to prevent communication problems from electrical noise, and motor current leakage. Failure to provide proper
ground wiring can result in property damage and equipment malfunction.
• Install a main shutoff switch or circuit breaker that interrupts all power sources simultaneously. Failure to install proper electric components
will result in property damage and equipment malfunction.
• Maintain polarity throughout the communication network. The system will malfunction if not properly wired.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING CONNECTIONS | 219
Wiring Connections
MULTI
F
MAX
MULTI
F