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Weekly:
Inspect for bacterial growth and general operation conditions.
Bacterial growth should be reported to your water treatment expert for
immediate attention.
Monthly (Weekly at start up):
Observe, touch, and listen to the fluid
cooler. Become accustomed to its normal appearance, sound, and level
of vibration. Abnormal aspects relating to the rotating equipment should
be considered reason to shut down the fluid cooler until the problem can
be located and corrected. Observe operation of the motor, coupling (or
drive shaft), Geareducer, if equipped and fan. Become familiar with the
normal operating temperature of the motor(s), as well as the sight and
sound of all components as a whole.
If equipped, check Geareducer oil level. Shut down the unit and allow 5
minutes for the oil level to stabilize. Add oil if required. 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 plug-
ging. Remove any debris that may have accumulated.
Check for any buildup of silt on the floor of the collection 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—a maximum charge of 0.30 ounces (MHF702-MHF704) and 1.4
ounces (MHF706-MHF707) is recommended. Mobil SHC 460 grease is
recommended.
Semi-annually:
If equipped, check the belt tension and condition.
If equipped with dampers, lubricate jack shaft bearings and tiebar linkage
with silicone lubricant. If dampers are equipped with pneumatic or electric
actuators, the manufacturer's recommended maintenance procedures
should be observed. If dampers are exposed to heavy dust-laden air, oc-
casional flushing of the bearings with water is recommended.
Clean and disinfect cooling tower with biocides. Systems with biofouling,
high general bacterial counts, or positive cultures of legionella may require
Maintenance
