Engineering Manual

Figure 301: Multi F LMU18CHV System Power Wiring and Communications Cable.
Outdoor Unit
L1 L2 1(L1) 2(L2) 3(A) 3(B)
Outdoor Unit Terminal Block
L1
L1
L2
L2
G
Power Supply
Main Switch
Circuit Breaker
Fuse
Three-wire Power Wiring
(Including Ground)
COMMUNICATION CABLE
POWER WIRING
1(L1) 2(L2)
Indoor Unit Terminal Block
Unit A Unit B
3
1(L1) 2(L2) 3
Indoor Unit Terminal Block
G
1(L1) 2(L2)
Power Wiring (208-230V) and Communications Cable Details
WIRING CONNECTIONS
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injury or death.
• Use only stranded, shielded or unshielded copper communications / power wiring from the outdoor unit to the indoor units. If shielded, wiring must be
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• Ground wiring is required to prevent accidental electrical shock during current leakage, communication problems from electrical noise, and motor cur-
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• Install a main shutoff switch or circuit breaker that interrupts all power sources simultaneously. Electric shock can cause physical injury or death.
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• 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.
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components can result in property damage and equipment malfunction.
• Use only stranded, shielded or unshielded copper communications / power wiring from the outdoor unit to the indoor units. If shielded, wiring must be
grounded to the chassis at the outdoor unit only. Failure to install proper 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 can result in
property damage and equipment malfunction.
• Wiring cable size must comply with applicable national, state, and local codes. Improper wiring can result in property damage and equipment malfunction.
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214 | WIRING CONNECTIONS
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F