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duct (HIgH StatIc) | 63
Electrical Connections and Mechanical Specs
eleCtriCal ConneCtionS
Connecting the Power Wiring / Communications Cable
Best practice dictates using ring or spade terminals to terminate power wiring at the power
terminal block. 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.)
•
When terminating wires of the same thickness, follow the instructions demonstrated in the
figures below.
•
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 overtighten the connections; over-tightening may damage the terminals.
Ring Terminal
Power Wiring
Figure 58: Close up of a Typical Ring Terminal.
Circuit Breaker
Ground Wire
Power Supply
Outdoor unit
Figure 59: Proper and Improper Power Wiring Connections.
•
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.
: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.
If power wires are not properly terminated and / or firmly attached, there is a risk of fire, electric shock, and / or physical injury or death.
Figure 60: General Power / Communications System Schematic.
•
Secure the separate wires in the control
box panel using zip ties.
•
Secure wiring with accessory clamps so
that it does not touch piping.
•
Use a conduit for the cable
•
Outside the unit, make sure the commu-
nications cable and the power wiring are
shielded separately, otherwise, the out-
door unit operation may be affected by
electrical noise and will malfunction or
fail.
Wiring connections
Summary of Contents for LH247HV
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