OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
15
Precautions:
(1) Thermistor cable and remote controller wire should be kept away from power cable in a
distance of at least 50mm. Violating this rule may generate electric noise and lead to
malfunctions.
(2) Use wires as specified and connect them tightly with wiring terminals. Keep the wires in
order and do not obstruct other devices. Insecure connection may result in overheating
or even cause electric shock or fire hazard.
Wiring connection:
Fig.4.2.2.2
Connecting cables according to the following instructions, as figure shown above.
L......................... Live
N........................ Neutral
..................... Protective earth (screw)
H........................High gear of fan
M........................Middle gear of fan
L........................ Low gear of fan
1/2........................ Lines of fault signal from external feedback
D1/D2........................Communication wires
H1/H2........................Wired controller
Notes:
①
The H, M, L of fan gear lines and the 1, 2 of Lines of fault signal from external feedback
are shorted by the factory default.
②
Neutral line of fan connects to the N.
It can be connected to any of them (H, M, L) when there is only one gear.
Disconnect the short cable between H and M when there are two gears, then connect
the high gear cable to H, and connect low gear cable to either M or L.
When there are three gears, disconnect the short cables between H and M, M and L,
then connect the high gear cable, middle gear cable and low gear cable to H,M,L for
each.
③
The lines of fault signal from external feedback are connected to the 1, 2.The line is a dry
contact and closed normally. If the line is closed, it represents no fault and the system
operates normally; if the line is disconnected, it represents malfunction and the system
will stop.
④
Disconnect the short cable between 1 and 2 when there is fault signal, and connect the
signal cable to 1 and 2.
