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10
CAUTION:
Openings and/or
submerged obstructions may exist
in the bottom of the cold water
basin. Use caution when walking
inside this equipment.
Inspection & Maintenance
• Inspect the cold water basin regularly. Remove trash or debris that may have
accumulated in the basin or on the strainer.
• Quarterly, or more often if necessary, drain, clean, and flush the entire cold water
basin with fresh water. This will remove the sediment, which can collect in the
basin during operation. If not removed, sediment can become corrosive and cause
deterioration of the protective finish of metallic basins.
–
When flushing the basin, leave the strainer in place to prevent debris from entering
the system.
–
Remove the strainer after the basin has been flushed.
–
Clean and replace the strainer before refilling the basin with fresh water.
• Adjust the float to maintain the design operating level. See
Table 1
on
page 9
.
Fan
The Series 3000 Cooling Tower uses an axial fan. Thoroughly inspect the fan for damaged
or deteriorated fan blades and replace the fan as required.
Inspection & Maintenance
• If the unit is already in operation, while the fan is running, check for any unusual
noise or vibration.
• With the fan off and the motor disconnected, locked out, and tagged out, check the
general condition of the fan:
–
Inspect for any loose or missing bolts in the fan shaft bushing, the fan hub, and the
fan shaft bearing(s).
–
Check the fan blades for looseness, first by twisting the blade by hand, and then by
moving the blade tip up and down. There should be no play or slippage.
–
Inspect each blade for excessive scale build-up that could cause vibration.
–
Check each blade for any cracks. If cracks are found, the fan motor should be
locked out until the fan is replaced. Contact your local BAC Representative for
assistance.
–
Whisper Quiet Fan Only:
The blades shall be inspected at regular intervals, a
minimum of once every month, for deposits and damage. Deposits shall be removed
using brushes and/or a water jet with a maximum water pressure of 45 psig (3 bar).
–
Whisper Quiet Fan Only:
To ensure optimal functioning and operational safety of the
impeller, it is necessary to at least once a year:
–
Check the tightening torque of the bolt connections (refer to
Table 2)
.
–
Apply a new paint coating if the paint coating is damaged or corroded away to
prevent corrosion. The paint type shall be at least equal to the original paint.
–
Replace corroded bolts and nuts.
DANGER:
Do not perform any service
on or near the fans, motors, and
drives, or inside the unit without
first ensuring that the fans and
pumps are disconnected, locked
out, and tagged out.
ATTENTION:
Neglected damaged
areas on the Whisper Quiet Fan can
result in the attack of the glass-
fiber layers (a process commonly
known as fiberbloom) because of
moisture entering through these
spots.
Table 2.
Whisper Quiet Fan Tightening Torque
Model Number
Fan Dia.
U-bolt Type
Tightening
Torque (ft-lbs)
3240C to 3393C, 3430C
7'-6"
M12
44
3412C, 3436C to 31056C, 31133C
9' to 11'
M16
103
31130C to 31132C, 31186C to 31301C
13'
M20
184
