3.6
Precautions for wiring work
Warning
· Use high-quality wiring equipment and devices, and carry out wiring
work safely and securely according to the technical standards for
electrical facilities, as well as the indoor wiring regulations.
· Only qualified personnel such as licensed electrical engineers are
allowed to carry out electrical wiring work.
Unqualified persons are prohibited by law from performing wiring work
and it is very dangerous.
·
Do not forcibly bend, pull or pinch the motor lead wire.
Failure to observe this may result in an electric shock.
(1)
Be sure to install a ground fault interrupter on the primary power side of the fan.
(2)
An overload protection device is not built into the motors with an output of over 200W.
Separately install one.
(3)
Be sure to install a ground wire to prevent an electric shock.
•
Do not connect the ground wire to gas pipes, water pipes, lightening arresters, or ground
wires for telephone.
Warning
It is prohibited by law to perform incomplete grounding work, which
exposes personnel to a great danger.
(4)
The wire connection of the ALF
II
U-20M differs between 50 Hz and 60 Hz. Connect the
wires according to the following connection diagram.
ALF
II
-20M circuit diagram
Wire connection pattern
(Connection for 50 Hz)
(Connection for 60 Hz)
Black – Red
White
Green (Ground)
A
u
x
ili
ary wi
ndi
ng
Black
White
Red (No connection needed)
Green (Ground)
M
a
in
wi
ndi
ng
Black
White
Red
Green
(5)
Control the fluctuation of the voltage within ±10% of the rated voltage, and the frequency
within ±5% of the rated frequency. If the product is not used within the range, it may break
down.
(6)
Before running the fan, check the following points again:
c
An appropriate fuse (ground fault interrupter) is installed.
d
Wiring is correct.
e
The product is securely connected to a ground.
f
For three-phase power, none of the three terminals of the motor has come loose or
is disconnected.
Keep in mind that running with connection of only 2 terminals results in open-phase
operation, which may cause motor burnout.
3-3
Summary of Contents for ALF-UII
Page 15: ......
