Multi F Engineering Manual

Table Of Contents

Figure 50: Multi F LMU303HV and LMU363HV System Power Wiring and Communications Cable.

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ELECTRICAL CONNECTIONS

Outdoor Unit

L(L1)

3(A) 3(C) 3(D)3(B)

Outdoor Unit Terminal Block

Power Supply

Main Switch

Circuit Breaker

Fuse

Three-wire Power Wiring

(Including Ground)

COMMUNICATIONS CABLE

POWER WIRING

1(L1) 2(L2)

Indoor Unit Terminal Block

Unit A Unit B Unit C Unit D

1(L1) 2(L2) 3 1(L1) 2(L2) 3 1(L1) 2(L2) 3

Indoor Unit Terminal Block Indoor Unit Terminal Block

Indoor Unit Terminal Block

N(L2) L(L1) N(L2) L(L1) N(L2) L(L1) N(L2) L(L1) N(L2)

• All field-supplied wiring, components, and materials must comply with all applicable national, state, and local codes and requirements.

Improper wiring will result in fire, electric shock, causing 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. 'RQRWFRQQHFWWKHJURXQGOLQHWRWKHSLSHV7KHUHLVDULVNRI¿UHHOHFWULFVKRFNH[SORVLRQUHVXOWLQJLQSK\VLFDO

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, resulting in physical injury or death.

• Terminal block labels, appearances, and location will vary depending on outdoor unit model.

• Maintain polarity throughout the communication network. The system will malfunction if not properly wired.

NOTE

• 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.

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ELECTRICAL CONNECTIONS | 59

Electrical Connections

MULTI

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