AEC TK Series Cooling Tower Water Treatment Systems - Manual (Page 13)

13
WARNING
THE SAND FILTER OPERATES UNDER PRESSURE AND SHOULD NEVER BE OPENED UNTIL THE
PUMP IS SHUT OFF AND THE PRESSURE IS BLED OFF THROUGH THE AIR RELIEF VALVE. NEVER
OPERATE THE SAND FILTER AT PRESSURES OVER 30 PSI. SUCH PRESSURES COULD INDICATE
THE NEED FOR CLEANING OR A MALFUNCTION IN THE SAND BED. THE FILTER SYSTEM IS
DESIGNED TO WITHSTAND WATER TEMPERATURES UP TO 120
o
F/49
o
C.
The factory preset time interval for back washing is 12 hrs do not lengthen this
interval without approval of AEC. Failure to comply can result in solidifying
sand.
TK SERIES
REACTION COLUMN START UP PROCEDURE
• With the filter in operation and the bypass open fully, slowly open the reaction
column isolation valve(s) fully followed by the reaction column control valve(s)fully.
• During this initial adjustment, run the flow rate thru the column(s) at the lower portion
of the flow range sticker.
• If the column flow is lower than the lower portion of the flow range sticker slowly
close the bypass valve until the proper flow rate is achieved for each column. The
reaction column control valves may need to be adjusted in multiple column systems
to properly balance the flow.
• Allow the system to operate at this rate for 24 hours. After that time, verify that the
system has backwashed at least 2 additional times, as indicated on the backwash
counter.
• The system is now ready for the full process flow rate. Slowly turn the bypass valve
toward the closed position until the flow is ¾ of the way up the flow range sticker.
On multiple column systems it will be necessary to adjust the reaction column
control valves to properly balance the flow to the individual columns.
• The system is now fully operational.
WARNING
THE REACTION COLUMN(S) OF THIS SYSTEM, EACH HAVE A MAXIMUM RATED FLOW CAPACITY
OF 25 GALLONS PER MINUTE PER COLUMN. OPERATING THE REACTION COLUMN(S) AT A FLOW
RATE GREATER THAN ITS DESIGNED PARAMETERS MAY RESULT IN THE LOSS OF REACTION
MEDIA, AND WILL REDUCE THE SYSTEMS’ EFFICIENCY.