Tk series – AEC TK Series Cooling Tower Water Treatment Systems User Manual
Page 15
15
TK SERIES
AEC, INC.
MAINTENANCE CONTINUED
QUARTERLY
1)
Remove sand filter top for inspection of the sand bed. Turn the system off, close the
pump feed valve, the reaction column flow adjustment valve(s) and the flow bypass
valve.
¾
Open the air relief valve located on the top of the filter chamber to relieve any
pressure. This should be done any time you are working on the system to assure
your safety.
Drain the water from the sand filter by removing the drain plug located in the bottom
discharge pipe from the filter vessel. Remove the tank top by loosening the
perimeter band clamp.
Inspect the sand, removing any trapped solids that may have accumulated on the
bed surface. The sand should be tested by thoroughly probing the sand bed with
your hand, all the way to the bottom of the filter, checking for any solidification that
may have occurred. Remove any bound sand replace with new.