Amcot ST Series - Page 20

AMCOT ST SERIES FIBERGLASS COOLING TOWER
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GENERAL MAINTENANCE
WATER DISTRIBUTION SYSTEM – SPRINKLER HEAD ASSEMBLIES
Sprinkler Head (ST-70 thru ST-1500)
Sprinkler heads on models, ST-70 to ST-1500 are constructed from aluminum or stainless steel.
Sprinkler heads are secured to center riser pipe by a threaded connection.
Removing the entire assembly:
1. Disassemble the spray arms according to the instructions found on Page 17.
2. 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. Shutdown your cooling tower and remove casing panel to gain access. (ST-70 – ST-125)
a. For ST-150 to ST-1500 it is recommended that you enter the tower by way of the fan
guard located on top of the unit.
b. You should use a thin sheet of plywood and place this on top of the fill media so as to
not stand directly on the fill. The fill is designed to support the weight of a maintenance
worker, but you should avoid standing directly on the fill.
2. Remove cap cover on top of sprinkler head.
3. Remove the circlip.
4. Pull the top section of the sprinkler head from the base.
5. Clean sprinkler head with fresh water and a brush.
6. Inspect parts for any wear or damage.
7. If parts are damaged or worn, replace the parts or contact your local
representative/distributor/contractor.
8. It may be possible to replace the bearings.
9. See the table on page 19 for more information.
10. If the parts appear to be OK after cleaning reassemble the sprinkler head.
11. 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 17).
7. Reinstall casing panel and bring unit online.