Amcot ST Series - GENERAL MAINTENANCE; WATER DISTRIBUTION SYSTEM

AMCOT ST SERIES FIBERGLASS COOLING TOWER
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GENERAL MAINTENANCE
WATER DISTRIBUTION SYSTEM – SPRINKLER PIPE ASSEMBLIES
General Overview
Your ST Series water distribution assembly rotates based on the water returning to the tower. The force
of this water fills the overall system and as the water exits through holes located on the sprinkler arms,
this propels the assembly causing it to rotate.
For accessing your water distribution system, it will be necessary to remove a section of the tower’s
casing panel, or to enter the tower through the fan guard on larger units.
WARNING: Do NOT attempt to repair or replace water distribution system components without first
shutting down your cooling tower and performing lockout/tagout procedures.
Sprinkler pipes and their water diverter should never come into contact with the fill media or casing
walls. If this occurs, the assembly will fail to rotate properly and impact tower capacity. Sprinkler pipes
must also be regularly inspected to ensure that the orifices have not become blocked due to debris or
particulate matter.
Sprinkler Pipe Assemblies (ST-H-5 thru ST-30)
Sprinkler pipes on ST-H-5 thru ST-30 are attached to the center sprinkler head by a threaded end
connection and a lock nut which is designed to prevent the arms from becoming loose.
Disassembly:
1. Shutdown your cooling tower and remove casing panel to gain access.
2. Loosen the lock nut on the sprinkler arm.
3. Unthread the arm from the sprinkler head.
Cleaning:
1. Flush the arm using a spray hose and insert a screwdriver into the orifices to free or loosen any
debris.
2. Gently tap the threaded end on the ground to expel any debris.
Installing: (after cleaning or for new sprinkler arms)
1. Screw the sprinkler arm back onto the sprinkler head taking care not to cross thread them.
2. The orifices should be pointing straight down.
3. Retighten the locking nut.
4. Adjust the arm a final time by turning it counter-clockwise so that the orifices are at a slight
angle.
5. Reinstall casing panel and bring unit online.