S3 0312FC, Руководство оператора, Страница: 35 / 58

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shutting the fan off for the season, shut off the
power at the fan disconnect rather than at the
controls to provide additional protection from
unauthorized personnel operating the fan. Refer to
the Maintenance Section for Off-Season operation
recommendations.
12 Maintenance
12.1
Inspection
The frame, housing and intake screen should be
checked for structural damage and integrity.
Ensure the motor is unplugged / disconnected and
remove the intake screen to ensure there is no
foreign material or obstruction inside the fan. Be
sure the rotor turns freely by hand and that there
is approximately ⅛” clearance between the intake
and the rotor.
12.2
Fan Operation in Off-Season
During the off-season, the fan blades should be
allowed to turn freely. Also, during the off-season,
operate the fan for approximately 30 minutes
every three weeks. The operation of the fan keeps
the lubricant more evenly distributed within the
bearing cavity and dries out any condensation that
could be in the motor.
During the off-season, make sure the control
enclosure cover is secured to the control
enclosure. Before operating, the switch should be
inspected. If the switch appears pitted or the wires
have been degraded, replace faulty parts.
Complete a full component check.
12.3
Fan Motor Maintenance
Motor eye bolts, lifting lugs or lifting openings, if
provided, are intended only for lifting the motor
and motor mounted standard accessories not
exceeding, in total 30% of the motor weight. These
lifting provisions should never be used when lifting
or handling the motor and drive equipment. Eye
bolt lifting capacity rating is based on a lifting
alignment coincident with eye bolt center line. Eye
bolt capacity reduces as deviation from this
alignment is increased. Be sure eye bolts are tight
and prevented from turning before lifting.
Do not touch electrical connections before you
ensure that power has been disconnected.
Electrical shock can cause serious or fatal injury.
Be sure the system is properly grounded before
applying power. Electrical shock can cause serious
or fatal injury.
Surface temperatures of motor enclosures may
reach temperatures which can cause discomfort or
injury to personnel accidentally coming into
contact with hot surfaces. Protection should be
provided by the user to protect against accidental
contact with hot surfaces. Failure to observe this
precaution could result in bodily injury.
12.4
Drain Plugs
One or more condensation drain plugs are
provided on each endplate for various motor
mounting configurations. For wash-down and
totally enclosed, fan cooled or non-ventilated
motors, the plugs in the lowest portion of the ends
shields should be removed for operation (unless
the motor has special stainless steel drains). All
drains are located in the lowest portion of the ends
shields.