Teral CTFII - Wiring Work Precautions

3-8
3.8 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 and the indoor wiring regulations.
Only qualified personnel such as licensed electrical engineers are
allowed to carry out electrical wiring work.
Incomplete wiring work by an unqualified person is prohibited by law
and very dangerous.
(1) Be sure to install a ground fault interrupter and an overload protection device on the primary
power side of the fan.
(2) If a standard thermal relay is used for the following models as an overload protection device,
it may trip at the startup. Use a time delay thermal relay instead.
Frequency Model number Motor output RPM
CTFII - No.3½ 3.7 kW 1880 min
-1
CTFII - No.4 3.7 kW 1460 min
-1
CTFII - No.4½ 5.5 kW 1340 min
-1
50 Hz
CTFII - No.5 5.5 kW 1190 min
-1
CTFII - No.3½ 3.7 kW 1870 min
-1
CTFII - No.4 3.7 kW 1510 min
-1
CTFII - No.4½ 5.5 kW 1390 min
-1
60 Hz
CTFII - No.5 5.5 kW 1200 min
-1
(3) Be sure to install a ground wire to prevent an electric shock.
• Connect the ground wire to the ground terminal in the terminal box of the motor.
• Do not connect the ground wire to gas pipes, water pipes, lightening arresters, or ground
wires for telephone.
Warning
Incomplete wiring work is prohibited by law and very dangerous.
(4) Control fluctuations of the voltage within ±10% of the rated voltage, and the frequency within
±5% of the rated frequency. Note that, if the unit is used beyond the ranges, it may cause a
failure.
(5) Before running the fan, check the following points again:
c An appropriate fuse (ground fault interrupter) is installed.
d Wiring is correct.
e The unit is securely connected to a ground.
f None of the three terminals of the motor is loosened or disconnected.
Caution
Do not operate the unit with only two terminals connected.
Failure to observe this may cause the motor to burn out.