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24
Electric Wiring Between Indoor Unit and Outdoor Unit
Single-phase units
(18K~48K)
POWER AND WIRING INSTALLATION
G
Power: Power:
Outdoor
Air Damper
Wired
Controller
H1H1
H2H2
G
X1X1 XX22
Indoor Unit Electrical Wiring
Locate and remove the electrical box cover to access wire terminals.
Indoor Communication Wiring
The recommended communication cable size is a minimum 18/2
AWG
stranded bare copper conductors 300V unshielded wire. Use
shielded cable if installation is in close proximity of RF and EMI
transmitting devices.
Locate wire terminals #1 and #2. Connect
communication cable from
outdoor unit to terminals #1 and #2.
Secure cable inside wire clamp/strain
relief. Verify cable is secure,
not loose and no external force on wires affects the connections at
the terminals.
Indoor Unit Power Wiring
Locate wire terminals L1 and L2. Connect main electrical power
outdoor unit to terminals L1 and L2. Connect ground wire to
grounding screw. Secure electrical wires inside wire clamp/strain
relief. Verify wires are secure, not loose and no external force on
wires affects the connections at the terminals.
Programmable
Controller Wiring
Use a minimum 18-2 AWG wire (field supplied) to connect Programmable Controller to
the indoor
unit. Route wire from Programmable Controller into electrical box. Locate wire
terminals H1
and H2.
Connect Programmable Controller wires to H1and H2. Verify wires
are secure, not loose and no external force on wires affects the connections at the
terminals.
NOTE: Record wire colors and terminal references for use
with Outdoor Unit wire connections.
Typical Wiring Diagram
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