4-1
4. Preparation for operation
4.1 Points to be checked before test running
4.1.1. Checking the electrical system
(1) Check that the fan is correctly wired.
(2) Check that the terminals are securely connected.
(3) Check that the equipment is securely grounded.
(4) Check that the settings of the overload protection device meet the rated current value of the
motor being used. The rated current value is indicated on the motor nameplate.
4.1.2. Checking the fan system
(1) Check that water has not accumulated in the fan and that no foreign matters or materials
such as tools have been left inside.
(2) Check that all the connections of foundation bolts, the fan, accessories and pipe joints are
securely tightened.
(3) Check that the dampers and valves can fully open and close, and that they operate properly.
(4) Check that a specified amount of lubricant is filled (to the specified level in the oil gauge)
when the bearing is lubricated in an oil bath.
(5) Check the cooling water when the bearing is cooled in an oil bath or by a water-cooling
system.
Supply about 10 to 14 ℓ/min of clean water at a temperature of 25 °C or lower and a water
pressure of 0.3 MPa or less.
(6) When using a spring coupling, fill grease into the clearance between the tooth flanks before
combining them.
Make sure that an appropriate amount of grease is filled.
(7) Check the alignment of the tension of V-belt.
Warning
Be sure to turn OFF the main power before checking the fan by
rotating it by hand.
(8) Rotate the fan by hand or by inching a motor to check that it can rotate smoothly without any
internal obstructions.
(9) Put an operator in place in advance so that the fan can be turned OFF at any time
immediately after the instructions of the person in charge of the operation.
Warning
Do not operate the fan if you find any problem such as noise. Be sure
to contact a specialist company or a service center of the
manufacturer.
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