LG MULTI F Engineering Manual page 50

ELECTRICAL CONNECTIONS
Systems for Multi F with LGRED
Figure 40: Multi F with LGRED LMU240HHV System Power Wiring and Communications Cable Connections.
L1 L2
Power Supply
Main Switch
L1
Circuit Breaker
Fuse
Three-wire Power Wiring
(Including Ground)
POWER WIRING
COMMUNICATION CABLE
• All field-supplied wiring, components, sizes, and materials must comply with all applicable national, state, and local codes and require-
ments. Improper wiring may 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.
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
may result in property damage and equipment malfunction.
• Maintain polarity throughout the communication network. The system will malfunction if not properly wired.
50 | ELECTRICAL
G
L2
1(L1) 2(L2)
Indoor Unit Terminal Block
Unit A
Do not connect the ground line to the pipes. There is a risk of fire, electric shock, explosion, physical injury or
©
Outdoor Unit
Outdoor Unit Terminal Block
G
L1 L2 1(L1) 2(L2) 3(A)
G
3 1(L1) 2(L2)
Indoor Unit Terminal Block
Unit B
F
MULTI
WITH
F
MULTI MAX
1(L1) 2(L2) 3(B) 1(L1) 2(L2) 3(C)
G G
3
1(L1) 2(L2)
Indoor Unit Terminal Block
Unit C
3