LG MULTI F Engineering Manual page 59

F
MULTI
F
MULTI MAX
Figure 50: Multi F MAX LMU480HV and LMU540HV System Power Wiring and Communications Cable.
• All field-supplied wiring, components, sizes, and materials must comply with all applicable national, state, and local codes and require-
ments. 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, explo-
sion, physical injury or death.
• All field-supplied wiring, components, sizes, and materials must comply with all applicable national, state, and local codes and require-
ments. 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.
©
L N
Power Supply
Main Switch
L
Circuit Breaker
Three-wire Power Wiring Fuse
(Including Ground)
Branch Distribution Unit (A)
1(L1) 2(L2) S
1(L1) 2(L2) S 1(L1) 2(L2) S 1(L1) 2(L2)
1(L1) 2(L2) 3 1(L1) 2(L2)
Indoor Unit Terminal Block Indoor Unit Terminal Block
POWER WIRING
COMMUNICATIONS CABLE
ELECTRICAL CONNECTIONS
Outdoor unit
Outdoor Unit Terminal Block
N
G
L1 L2 1( L1 ) 2 (L2 ) 3 (A ) 1( L1 ) 2 (L2 ) 3 (B)
S
1(L1) 2(L2)
S 1(L1) 2(L2) S
3 1(L1) 2(L2) 3
Indoor Unit Terminal Block
Branch Distribution Unit (B)
* Same Wiring as Branch Distribution Unit (A)
1(L1) 2(L2) 3
Indoor Unit Terminal Block
ELECTRICAL CONNECTIONS | 59