15
troubleshooting
SAFETY FIRST–The CP cooling tower has been designed to provide a safe working environment while either
operating or shut down. The ultimate responsibility for safety rests with the operator and owner. When water
flow to the tower is shut off or when portions of the tower require maintenance, temporary safety barricades may
be required around openings and fall protection equipment should be utilized where appropriate for compliance
with OSHA and CE regulations, standards and good safety practices.
Trouble
Cause
Remedy
Unusual fan drive
vibration
Loose bolts and cap screws
Tighten all bolts and cap screws on all mechanical equipment and
supports.
Fan
Make certain all blades are as far from center of fan as safety devices
permit. All blades must be pitched the same. See “Fan IOM Manual.” Clean
off deposit build-up on blades
Fan noise
Blade rubbing inside of fan hood
Adjust to provide blade tip clearance
Loose bolts in blade clamps
Check and tighten if necessary.
Scale or foreign
substance in circulating
water system
Insufficient blowdown
See "Water Treatment" section of this manual.
Water treatment deficiency
Consult competent water treating specialist. See "Water Treatment"
section of this manual
Condensing temperature
too warm.
See “Cooling Tower
Operation.”
Entering wet bulb temperature is above design
Check to see if local heat sources are affecting evaporative condenser.
See if surrounding structures are causing recirculation of evaporative
condenser discharge air. Discuss remedy with Marley representative.
Design wet bulb temperature was too low.
May have to increase evaporative condenser size. Discuss remedy with
Marley representative
Actual process load greater than design
May have to increase evaporative condenser size. Discuss remedy with
Marley representative
Overpumping
Reduce water flow rate over evaporative condenser to design conditions.
Evaporative condenser starved for air
Check motor current and voltage to be sure of correct contract
horsepower. Repitch fan blades if necessary. Clean eliminators. Check to
see if nearby structures or enclosing walls are obstructing normal airflow
to evaporative condenser. Discuss remedy with Marley representative.
Excessive drift exiting
evaporative condenser
Spray system malfunction
Inspect spray system for proper operation. Correct as necessary.
Faulty drift elimination
Check to see that the eliminators are clean, free of debris and installed
correctly. Clean if necessary. Replace damaged or worn out components.
