40
Single Zone High Efficiency W
all Mounted Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ELECTRICAL WIRING
• If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death.
• Never ground the shield of the communications cable to the indoor unit frame or other grounded entities of the building.
• Never apply line voltage power to the communications cable terminal block. If contact is made, the PCBs may be damaged.
• Always include some allowance in the wiring length when terminating. Provide some slack to facilitate removing the electrical
panels while servicing.
Figure 54: Single Zone Outdoor and Indoor Wiring and Communications
Cable Diagram
:Copper Wire
Terminate multiple power wires of
the same gauge to both sides.
Do not terminate two wires on
one side.
Do not terminate different gauge
wires to a terminal block.
Ring Terminal
Power Wiring
Connecting the Power Wiring
Guidelines
Best practice dictates using ring or spade terminals to terminate
power wiring at the power terminal block (Figure 55).
If ring terminals or spade clips are not available, then:
Do not terminate different gauge wires to the power terminal block. Slack
in the wiring may generate heat and fire.
• When terminating wires of the same thickness, follow the instruc-
tions demonstrated in the illustrations below at Figure 56.
• Firmly attach the wire; secure in a way to prevent external forces
from being imparted on the terminal block.
• Use an appropriately sized screwdriver for tightening the terminals.
• Do not over tighten the connections; overtightening may damage
the terminals.
Figure 55: Close up of a Typical Ring Terminal
Figure 56: Proper and Improper Power Wiring Connections
Power Wiring Specifications and Best Practices
6/16” ± 2/16”
13/16”
GN/YL
Power Wiring, Ground
to Outdoor Unit
Power Wiring, Ground,
Communication Cable
From Outdoor Unit
To Indoor Unit
13/16”
GN/YL
Line Voltage
(208/230V)
GN/YL = (Ground, Yellow)
6/16” ± 2/16”
For 9/12K Indoor Units: AWG 14
For 18K Indoor Units: AWG 12
For 9/12/18K Indoor Units: AWG 18
