45
Electrical W
iring
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, with the exception of Mega 115V, which operates at 1Ø, 115V, 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 57 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 to avoid contact.
• 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 57: 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 58).
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 demon-
strated in the illustrations below at Figure 59.
•
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; over-tightening may damage the
terminals.
Figure 58: Close up of a Typical Ring Terminal
Figure 59: Proper and Improper Power Wiring Connections
Power Wiring Specifications and Best Practices
1/4”
3/4”
GN/YL
AWG_“A”
Power Wiring
and Ground
to Outdoor Unit
Power Wiring, Ground,
and Communication
Cable from Outdoor
Unit to Indoor Unit
AWG_“B”
Line Voltage
(208/230V)
GN/YL = (Ground, Yellow)
3/4”
GN/YL
1/4”
1/4”
1/4”
1/4”
WARNING
