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63
Electrical System Installation
Due to our policy of continuous product innovation, some specifications may change without notification.
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• Multi F Systems:
• Communication / connection (power) cable from the outdoor unit to the indoor unit for
lengths up to 130 feet must use a minimum of 14 AWG, four (4) conductor, stranded,
shielded or unshielded (if shielded, it must be grounded to the chassis of the outdoor
unit only), and must comply with applicable local and national codes.
• When the communication / connection (power) wires between the indoor unit and
outdoor unit is GREATER THAN 130 feet, use:
• A two (2) conductor wire for power (for each indoor unit).
• A two (2) conductor wire for communication / ground (for each indoor unit).
• Separate the power AT LEAST two (2) inches away from the communication /
ground wire (for each indoor unit).
• All wiring is still minimum 14 gauge, stranded, shielded, or unshielded as cited
above (for each indoor unit).
• Multi F MAX Systems:
• All communication / connection (power) cable from the outdoor unit to the branch dis-
tribution unit(s) must be a minimum of 14 AWG, four (4) conductor, stranded, shielded
or unshielded (if shielded, it must be grounded to the chassis of the outdoor unit only),
and must comply with applicable local and national codes.
• Communication / connection (power) cable from the branch distribution unit(s) to
the indoor units for lengths up to 130 feet must use a minimum of 14 AWG, four (4)
conductor, stranded, shielded or unshielded (if shielded, it must be grounded to the
chassis of the outdoor unit only), and must comply with applicable local and national
codes.
• When the communication / connection (power) wires between the branch distribution
unit and indoor unit is GREATER THAN 130 feet, use:
• A two (2) conductor wire for power (for each indoor unit).
• A two (2) conductor wire for communication / ground (for each indoor unit).
• Separate the power AT LEAST two (2) inches away from the communication /
ground wire (for each indoor unit).
• All wiring is still minimum 14 gauge, stranded, shielded, or unshielded as cited above (for each indoor unit).
• Insulation material as required by local code.
• 5DWHGIRUFRQWLQXRXVH[SRVXUHRIWHPSHUDWXUHVXSWR)
• Firmly attach the cable; provide slack but secure in a way to prevent external forces from being imparted on the terminal block.
• Wiring must be completed without splices.
• Use a conduit for the communications / connection (power) cable from the outdoor unit to the indoor units and branch distribution unit(s).
Electrical interference my cause product malfunction.
•
Never ground the shield of the communications cable to the indoor unit frame or other grounded entities of the building. Ground the
communications cable shield only at the outdoor unit. Improperly grounding this cable can cause communications errors.
• The communications / connection (power) cable from the outdoor unit to the indoor units / branch distribution unit(s) must be separated and
isolated from power wiring to the outdoor unit, computers, radio and television broadcasting facilities, as well as medical imaging equip-
ment. Electrical interference my cause product malfunction.
Figure 77: Multi F Outdoor Unit to Indoor Unit, and
Multi F MAX Branch Distribution Unit to Indoor
Unit Wiring Diagram for Wiring Lengths GREATER
THAN 130 Feet.
Two-Conductor
Power Cable
GN/YL
GN/YL = (Ground, Yellow)
Two-Conductor
Communication /
Ground Cable
Separate At Least
Two (2) Inches
13/16"
7/16" ± 1/8"
1(L1)
2(L2)
13/16"
7/16" ± 1/8"
3
Figure 76: Typical Multi F / Multi F MAX Outdoor
and Indoor / Branch Distribution Unit Wiring and
Communications Cable Diagram For Wiring
Lengths Up to 130 Feet.
Power Wiring, Ground,
Communication Cable
From Outdoor Unit
To Indoor Unit or from the
Outdoor Unit to the Branch
Distribution Unit
13/16”
GN/YL
GN/YL = (Ground, Yellow)
7/16" ± 1/8"
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