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Inspection & Maintenance
• Inspect the cold water basin monthly. Remove trash or debris 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 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 the sediment from
re-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.
Fan
FXV, FXV3, CXVB, and CXVT units use axial fan(s). Thoroughly inspect the fan(s) for
damaged or deteriorated fan blades and replace the fan(s) as required.
Inspection & Maintenance
• If the unit is already in operation, while the fan is running, check for any unusual
noises or vibrations.
• 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 in the area of the shank for any signs of cracking. If cracking is
found, the fan motor should be locked out immediately. Contact your local BAC
Representative for assistance.
• Tip Clearance: Check the clearance between the tip of the blade and the fan cowl.
The clearance should be within 5/16" to 1/2" for single air intake FXV/CXVB units and
within 3/8" to 3/4" for dual air intake FXVT/CXVT units.
• Drain Holes: On hollow blades, the drain hole in the blade tip should be unobstructed.
Tip: Use a piece of wire to probe the hole.
• Blade Pitch: Check to ensure that the blades are all at the same pitch. If uncertain,
measure the pitch with an inclinometer. All blades should be within -1/2° to 0°.
• Rotation: Turn the fan by hand to ensure that it moves freely with no rough spots,
binding or other malfunctions that could cause vibration or fan motor overload. While
rotating the fan, check the blade tracking. All blades should track within a 3/4" to 1"
band at any single point around the cowl.
• Direction of Rotation: On initial start-up, or if the fan motor has been rewired, bump
the fan motor and note the direction of rotation. It should rotate in the direction
indicated by the arrow on the fan cowl. On units with independent fan motors, check
the rotation of each fan.
• Operation: On initial start-up, run the fan in the manual position for several minutes
and check for any unusual noises or vibration.
Detailed Component
Maintenance
Procedures
Cold Water Basin
Water Levels
Inspection & Maintenance
Fan
Inspection & Maintenance
CAUTION: Openings and/or
submerged obstructions may exist
in the bottom of the cold water
basin. Use caution when walking
inside this equipment.
DANGER: Rotating equipment
will cause severe personal injury
or death to persons who come in
contact. Do not perform any service
on or near the fans, motors, and
drives, or inside the unit without
first ensuring that the fans and
pump motors are disconnected,
locked out, and tagged out.
NOTICE: Check to ensure the
controls for the fan motor are set
to allow a maximum of six on-off
cycles per hour to prevent motor
overload.
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WW W.BALTI MOREAIR CO IL .C O M
WW W.BALTI MOREAIR CO IL .C O M
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