Amcot ST Series - COOLING TOWER TROUBLESHOOTING GUIDE; RISE IN COLD WATER TEMPERATURE; NOISE AND;OR VIBRATION; EXCESS AMP DRAW ON MOTOR

AMCOT ST SERIES FIBERGLASS COOLING TOWER
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COOLING TOWER TROUBLESHOOTING GUIDE
SCENARIO
CAUSES
SOLUTIONS
RISE IN COLD WATER
TEMPERATURE
1. EXCESS OR LACK OF WATER FLOW
1. CHECK PIPING VALVES AND MAKE SURE DESIGN WATER
FLOW RATE IS MAINTAINED.
2. IRREGULAR AIR FLOW
2. MAKE SURE EQUIPMENT AIR INTAKE IS NOT BEING
BLOCKED. IMPROVE VENTILATION.
3. RECIRCULATION OF AIR EXHAUST
3. TOP OF TOWER IS BELOW AN ADJACENT WALL OR
ENCLOSURE WHICH COULD CAUSE WARM AIR TO
RECIRCULATE. POTENTIALLY NEED TO ELEVATE TOWER.
4. IRREGULAR OPERATION OF WATER
DISTRIBUTION ASSEMBLY
4. CLEAN SPRINKLER ARMS, CHECK HOLE POSITION, MAKE
SURE NO WATER IS COMING OUT OF BASE OF SPRINKLER
HEAD.
5. IMPROPER AIR FLOW
5. CHECK AMP DRAW AND ADJUST FAN PITCH ACCORDING TO
MANUAL.
6. FILL BLOCKAGE
6. REPLACE FILL MEDIA.
WATER
DISTRIBUTION
SYSTEM
1. SPRINKLER HEAD SEAL HAS FAILED RESULTING IN
WATER COMING OUT AT BASE OF SPRINKLER HEAD.
1. CLEAN/REPLACE SPRINKLER HEAD.
2. SPRAY ARMS NOT ROTATING WITHIN PROPER
RANGE FOR UNIT.
2. CLEAN SPRINKLER ARMS, ADJUST SPRINKLER ARM HOLES
TO ACHIEVE PROPER ROTATION.
3. CHECK VALVES EXTERNAL TO TOWER.
3. MAKE SURE VALVES ARE SET PROPERLY.
4. CHECK PUMP FOR IMPELLER/SEAL PROBLEMS OR
IMPROPER SIZING.
4. PERFORM MAINTENANCE ON PUMP.
5. CHECK STRAINERS/FILTERS
5. PERFORM MAINTENANCE/CLEANING OF BASKET STRAINERS
OR FILTERS.
NOISE AND/OR
VIBRATION
1. FAN BLADE TIPS IN CONTACT WITH CASING
PANEL.
1. ADJUST FAN MOUNTING
2. IMPROPER MOUNTING OF FAN BLADES
2. ADJUST PITCH ANGLE OF FAN BLADES PER MANUAL
INSTRUCTIONS.
3. LOOSE BOLTS
3. CHECK BOLTS/FASTENERS ON ALL PANELS AND
MECHANICAL ASSEMBLY.
4. V-BELT REDUCER NOISE
4. CHECK BELT TENSION/GREASE BEARINGS
5. MOTOR NOISE
5. MOTOR BEARING FAILURE, WILL REQUIRE REPLACEMENT
6. MECHANICAL ASSEMBLY CRACKS
6. CHECK MECHANICAL ASSEMBLY COMPONENTS FOR CRACKS
OR RUST/CORROSION. CONTACT AMCOT ASAP.
EXCESS AMP DRAW
ON MOTOR
1. FAN PITCH
1. CHECK FAN PITCH AND ADJUST SO AMP DRAW IS AT OR
SLIGHTLY BELOW NAMEPLATE AMPERAGE.
2. AIR RESTRICTIONS
2. POSSIBLE FILL BLOCKAGE WILL CAUSE INCREASE FAN
LOADING AND INCREASE AMP DRAW. REPLACE FILL.
3. LINE VOLTAGE FLUCTUATIONS.
3. CALL AN ELECTRICIAN TO TEST/MONITOR LINE VOLTAGE
4. MOTOR BEARING FAILURE OCCURRING
4. REPLACE MOTOR.
EXCESS DRIFT LOSS
1. WATER DISTRIBUTION MALFUNCTION
1. CHECK SPRINKLER HEAD AND ARMS FOR PROPER WATER
FLOW AND ROTATION SPEED.
2. FILL BLOCKAGE
2. CHECK FILL MEDIA, CLEAN OR REPLACE.
3. TOO MUCH CIRCULATING WATER
3. CHECK WATER FLOW TO TOWER AND ADJUST WITH
EXTERNAL VALVES.
4. TOO MUCH AIR FLOW THROUGH UNIT
4. CHECK FAN PITCH, LOWER BLADE ANGLE TO REDUCE AIR
FLOW.