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in the fill or inconsistent coverage, this may be evidence of a clogged nozzle.
Inspect nozzles for blockage.
Every 3 months Lubricate fan shaft bearings. Each cell is equipped with
extended lube lines protruding through the casing adjacent to the access door.
While rotating equipment by hand, grease the bearings until a bead forms
around the seals—a maximum charge of 0.75 ounces is recommended. Mobil
SHC 460 grease is recommended.
Semi-Annually Check belt tension and condition. Adjust tensions as nec-
essary.
For those regions that require semi-annual fill removal and cleaning, remove
the fill through the fill access hatch (regional option) or the mechanical access
panel. Note the orientation and location of fill blocks. They must return into
the tower in the same location from which they were removed. Failure to do
so may result in diminished thermal capacity.
Annually Inspect the tower thoroughly, making maximum use of instructions
given in the separate user manuals. Check structural bolted connections and
tighten as required. Make preventive maintenance repairs as necessary.
Lubricate motor according to the manufacturer’s instructions. Motors with
sealed bearings do not require lubrication maintenance. Check to see that all
bolts are tight in the fan and mechanical equipment region, including the fan
cylinder and fan guard. Refer to Component User Manuals for torque values.
If the motor has sealed bearings, additional lubrication is not re-
quired. Refer to the motor nameplate to determine if grease type
and amount are specified.
Inspect the spray system and nozzles for any blockage. Nozzles can be re-
moved from the grommet by pulling sharply down on the nozzles. To replace
the nozzles, wet the surface of the nozzle and grommet and push nozzle back
into place.
Note
maintenance
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