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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 the frequency.
Running the fan at other than designated frequency may cause performance degradation, or
motor burnout, and damage to impeller and main shaft.
(3) Check that the terminals are securely connected.
(4) Check that the equipment is securely grounded.
(5) Check that the settings of the overload protection device match the rated current value of
the motor being used.
4.1.2 Checking the fan system
(1) Check that water has not accumulated in the fan and that no foreign objects or materials
such as tools have been left inside.
(2) Check that all the connections on 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 normally.
Warning
Always turn OFF the main power before rotating the fan by hand.
(4) Rotate the fan by hand or by inching a motor to check that it can rotate smoothly without any
internal obstructions.
(5) Place an operator in advance so that the fan can be turned OFF immediately after the
instructions of the person in charge of the operation.
Warning
Do not operate the fan if it is not running properly, for example if it is
making a strange noise. Contact a specialist company or the service
company designated by the manufacturer.
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