20 Vertical Air Handling Unit
Installation
Connect the wires to the terminals on the control board individually according to the outdoor unit
connection.
Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of
indoor unit respectively.
NK Chassis
COMMUNICATION LINE(IDU-ODU)
L(L1) N(L2)
Terminal Block IndoorTerminal Block Indoor
RDYL A BBK
POWER
INPUT
WIRED REMOTE
CONTROLLER
A ----BABAB
GND 12V
DRY2DRY1
INTERNET
Terminal block of outdoor unit
IDUSODU
NJ Chassis
COMMUNICATION LINE(IDU-ODU)
Terminal Block
Indoor
L(L1) N(L2)
Terminal Block Indoor
RDYL A BBK
POWER
INPUT
WIRED REMOTE
CONTROLLER
A ----BABAB
GND 12V
DRY2DRY1
INTERNET
Terminal block of outdoor unit
IDUSODU
Wiring
knockouts
Control
Box Cover
Upper
Front Panel
Wiring Connection
1. Detach the upper panel & control box cover.
And remove two wiring Knockouts.
Min wire size
(AWG)
Size of conduit
(inch(mm))
Knockout diameter
(inch(mm))
Power cable 22 1/2 (21.3) 7/8 (22.2)
Communication cable 22 1/2 (21.3) 7/8 (22.2)
Unit : inch(mm)
* Copper wire should be used.
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