AEC TK Series Cooling Tower Water Treatment Systems - Manual (Page 16)

16
TK SERIES
AEC, INC.
MAINTENANCE CONTINUED
YEARLY
¾ NOTE: AT A MINIMUM, AN ANNUAL CHANGE OF THE REACTION MEDIA IS
REQUIRED TO INSURE PROPER PERFORMANCE OF THE SYSTEM. PRIOR TO
THE ANNIVERSARY OF YOUR SYSTEM START UP DATE, REPLACEMENT MEDIA
SHOULD BE ORDERED. CONTACT AEC FOR PRICING AND DELIVERY.
1) Shut the system off, turn power supply disconnect to off position, and release pressure
from sand filter by opening the air relief valve located on the top of the filter vessel.
2) Close the isolation valve from the reservoir, flow bypass valve and reaction column flow
adjustment valve(s).
3) Open reaction column drain valve slightly, allowing the water in the column(s) to
slowly drain the column without plugging the strainer screen with reaction media. Note
that the union in the reaction column discharge return line should be opened to prevent
siphoning.
4) Once the reaction column has completely drained, disconnect the unions at the bottom
feed and discharge points (top).
5) Remove the complete reaction column carefully from the column stand. Lay the
reaction column on a level surface and remove distribution assembly at the base of the
column. Remove the old media and replace the four laterals per column. Reassemble
the reaction column(s) and remount to the column stand.
6) Load one complete can of media (53lbs) into each column. Clean gasket sealing
surfaces and replace the bottom plate assembly and the flange.
7) Reassemble plumbing and restart system following the start up procedure section of this
manual. Check backwash counter and observe valve operation.
Carefully follow the start-up procedure to remove trapped air from the media and
return the system to normal operation.