25
maintenance
fan. Become familiar with the normal operating temperature of the motor, as
well as the sight and sound of all components as a whole.
If equipped, check for Geareducer oil leaks. Check the Geareducer as well
as any optional oil lines to external oil dipstick/sight glass.
Inspect louvers, drift eliminators and basin trash screens and remove any
debris or scale which may have accumulated. Replace any damaged or worn
out components. Use of high-pressure water may damage the eliminator and
louver material.
Observe operation of the float valve. Depress the operating lever to make
sure that the valve is operating freely. Inspect the suction screen for plugging.
Remove any debris that may have accumulated.
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.
Every 3 months: If equipped, lubricate fan shaft bearings. While rotating
equipment by hand, grease the bearings until a bead forms around the seals.
Mobil SHC 460 grease is recommended.
Semi-Annually: If equipped, check the belt tension and condition.
If equipped, check Geareducer oil level. Shut down the unit and allow 5 min-
utes for the oil level to stabilize. Add oil if required.
Clean and disinfect cooling tower with biocides. Systems with biofouling, high
general bacterial counts, or positive cultures of legionella may require addi-
tional cleaning. Refer to “Cooling Tower Cleaning” section of this manual.
Consult your water treatment expert as to prudent biological evaluation testing.
Geareducer models used on NC cooling towers are designed for
5-yearoilchangeintervals.Tomaintainve-yearchangeintervals,
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.
➠
Note
To Next Page
