AMCOT ST SERIES FIBERGLASS COOLING TOWER
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GENERAL MAINTENANCE
WATER DISTRIBUTION SYSTEM – GENERAL DATA
Sprinkler Head Identification
When attempting to identify sprinkler heads on towers that have been in service for a long time, each
sprinkler head has a factory marking, “LSH” model number, on the top of the sprinkler head. To help
with identifying your sprinkler head or potential tower model number you can refer to the table below.
SPRINKLER HEAD REFERENCE NUMBERS
Sprinkler Head Bearings (ST-70 thru ST-1500)
For these sprinkler heads, as noted on Page 20, in some cases it may be possible for the customer or
contractor to replace the bearings which could allow you to return your unit to service faster. These
bearings can be sourced through local bearing shops and the numbers in the table below are universal
and can cross multiple manufacturers/brands of bearings.
Distribution System Rotation Speed
The speed at which the assembly rotates is based on the angle at which the sprinkler arm holes are set
at along with the water inlet pressure and the condition of the sprinkler head.
RECOMMENDED ROTATION SPEED FOR WATER DISTRIBUTION SYSTEM
If your rotation is too fast, you can slow the assembly down by rotating sprinkler arms in a clockwise
direction so that the openings where the water comes out turns slightly more towards the fill. However
if you turn them to where the openings are facing straight down, then your water distribution will fail to
rotate which is not recommended. Always test rotation speed with the fan motor running as the air
flow through the tower can cause the rotation speed to slow.
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