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When there is a number of weak
current wires, making it impossible for
the cable clamp to fix all the wires,
please use two ST3.6*6.5 self-tapping
screws to fix the power cable clamp
from the accessory package on the
installation board, and fix those weak
current wires that cannot be fixed on
the drain pan here.
[ Caution ]
The strong and weak current wires must be separated.
The use of an adapter board and function expansion board are optional.
Water level switch terminals are shorted when the water level switch is unavailable.
3
Power cable connection
1. Connection between the power cable and power supply terminal
The power supply terminal of the IDU is fixed on the main control
board, the power cable is connected to the power supply terminal
labeled "CN1" on the main control board. The live and neutral wires
are connected according to the main control board logos "L" and "N",
and the ground wire is directly connected to the electric control box
sheet metal part.
[ Caution ]
A
Do not bond and connect the power cable. Bonding and connecting the power cable may cause it to heat up,
resulting in a fire.
B
The power cable must be crimped reliably using an
insulated circular terminal block, and then connected
to the power supply terminal of the IDU, as shown in
the figure below.
Circular
terminal
block
D
Do not press the power cables of the same wire diameter on the same side of the terminal. Do not use two power
cables of different wire diameters for the same terminal blocks; otherwise, they can easily loosen due to uneven
pressure and cause accidents, as shown in the figure below.
Insulation sleeve
Power cable
Do not connect wires of
the same diameter on
the same side.
Main control board
CN1
C
If it fails to crimp the insulated circular terminal block due
to on-site limitations, connect the power cables of the
same diameter to both sides of the power supply terminal
block of the IDU, as shown in the figure below.
Connect wires of the
same diameter on both
sides.
of different diameters.
43
Installation
Electric control
box sheet
L N
metal part
Power input
Do not connect wires
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