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Check for any buildup of silt on the floor of the cold water basin. Mentally make
note of the amount, if any, so future inspections will enable you to determine
the rate at which it is forming.
Semi-Annually Check Geareducer oil level. Shut down the unit and allow
5 minutes for the oil level to stabilize. Add oil if required.
Check the external surface of the coil for any airborne contaminants obstruct-
ing the air flow to the coil.
Check that coil drain pipe does not have any obstructions, allowing water
to flow freely into the intermediate distribution basin. Coil drain is located at
bottom of coil opposite the water inlet.
If coil is not draining properly or if design flow rate is not maintained,
severe damage to coil could result during freezing temperatures.
Geareducer models used on NCWD cooling towers are designed for
5-year oil change intervals. To maintain five-year change intervals,
use only oil designed specifically for these Geareducers. If, after
five years, turbine-type mineral oil is used, the oil must be changed
semiannually. Refer to the Geareducer Manual for oil recommenda-
tions and further instructions.
Annually Inspect the tower thoroughly, making maximum use of instructions
given in the separate service manuals. Check structural bolted connections
and tighten as required. Make preventive maintenance repairs as necessary.
Lubricate motor according to the manufacturer’s instructions. See instructions
on page 26 for towers with the motor located outside the plenum option.
Fan
motors with sealed bearings do not require lubrication maintenance.
If the motor has sealed bearings, additional lubrication is not required.
Refer to the motor nameplate to determine if grease type and amount
are specified.
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.
Every 5 Years Change Geareducer oil. Refer to the Geareducer User Manual
for instructions.
Caution
Note
Note
maintenance
Summary of Contents for Marley NCWD
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