3-7
3.7
Precautions for wiring work
Warning
Use quality equipment for electric wiring and carry out the wiring
safely and securely according to the electrical installation technical
standards and the electrical building codes as well as the technical
standards for smoke ventilation fan.
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.
(1)
Be sure to install a ground wire to prevent an electric shock.
•
Connect grounding wire to the grounding terminal on the leg of the fan or inside the
terminal box.
•
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 wiring work, which
exposes personnel to a great danger.
(2)
Connect cables of the fan in reversed phase.
Standard connections are direct-start for 7.5kW or smaller motors and Star-Delta starting for
11kW or larger motors.
Follow the instructions in the attached operation manual of the motor for the connection to
the power line.
(3)
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.
(4)
Before running the fan, check the following points again:
c
Wiring is correct.
d
The product is securely connected to a ground.
e
None of the three terminals of the motor has come loose or is disconnected.
Caution
Do not operate the unit with only two terminals connected.
Failure to observe this may cause the motor to burn out.
(5)
When the fan is installed outdoors, be sure to connect conduit tube to the power cable outlet
of the terminal box.