40
Single Zone High Efficiency
, Standard, Extended Pipe and Mega W
all Mount Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ElEctrical Wiring
Power Supply / Power Wiring Specifications
• Single Zone systems operate at 1Ø, 208-230V, 60Hz.
• Power supply, wire type and size should be selected based on National Electrical Code and local codes. Maximum allowable voltage
fluctuation ±10% or nameplate rated value. Refer to Figure 54 for wiring guidelines.
• Properly ground the Single Zone outdoor unit and indoor unit per National Electrical Code and local codes.
• Use only copper wiring that is stranded and shielded with the wires separately insulated.
• Ground wire should be longer than the common power/communication wires.
• Refer to the inside of the Chassis Cover for Circuit and Terminal Block Diagrams for your model unit.
• Always match color codes of each wire and follow wiring diagram.
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 instructions demonstrat-
ed 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
