Spray Head Assemblies - Amcot ST Series Operation And Maintenance Instructions

AMCOT ST SERIES FIBERGLASS COOLING TOWER
GENERAL MAINTENANCE
WATER DISTRIBUTION SYSTEM – SPRINKLER HEAD ASSEMBLIES
Sprinkler Head
If your sprinkler head fails to rotate smoothly during normal operation or if you see a lot of water
coming out at the base of the sprinkler head, this is an indicator that the sprinkler head's water seal is
compromised.
In the event the sprinkler head becomes compromised, it may be possible to disassemble and repair.
However if attempts are made to do these repairs and failure continues to occur, then it is
recommended that the sprinkler head be replaced.
Sprinkler Head (ST-H-5 thru ST-60)
Sprinkler heads on smaller models, ST-H-5 to ST-60 are constructed from nylon. Sprinkler heads are
secured to center riser pipe by a threaded connection.
Removing the entire assembly:
1. Shutdown your cooling tower and remove casing panel to gain access.
2. Disassemble the spray arms according to the instructions found on Pages 15-16.
3. Remove the sprinkler head from the standpipe by turning the base counter-clockwise.
WARNING: Take caution when loosening the sprinkler head from the standpipe.
Applying too much force can crack the standpipe which will then require replacing.
Disassembly of Sprinkler Head:
1. Remove cap cover on top of sprinkler head.
2. Loosen the nut and washer until both top and bottom sections of sprinkler head are apart.
3. Clean the sprinkler head parts with fresh water and a brush.
4. Inspect parts for any wear or damage.
5. If parts are damaged or worn, replace the parts or contact your local
representative/distributor/contractor.
6. If the parts appear to be OK after cleaning reassemble the sprinkler head.
Installing the assembly: (after cleaning or for new parts)
1. Gently clean threads on both the sprinkler head and stand pipe.
2. Thread sprinkler head onto standpipe taking care not to cross thread.
3. To tighten sprinkler head, turn the base clockwise.
4. Continue to tighten by hand until you cannot tighten any further.
5. Using wrench, turn sprinkler head ¼ turn more. DO NOT OVER TIGHTEN.
6. Reinstall sprinkler arms accordingly (refer to Page 15-16).
7. Reinstall casing panel and bring unit online.
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