Filter
Top Products
Revised 1-8-2007
13
• Check spray pattern from nozzles to be sure there is no clogging. Remove drift eliminators
for nozzle inspection, then return to proper position.
• Start up fan motor and check amperage and voltage against motor nameplate data.
• The standard make-up valve assembly is shipped with the plastic float ball strapped against
the tower side to prevent damage. To set the ball for proper operation, loosen the screw in the
fulcrum arm, lift or depress the arm with the plunger pressed against the valve seat and
tighten. Repeat until the proper operating level is obtained (Refer to operating level table
below). It is recommended that a shut-off valve be installed in the make-up line.
• After 24 hours of operation:
Check spray nozzles for clogging.
Check tower sump water level.
Water Level in Tower Sump
• When the cooling tower is being operated with pump-suction, the make-up valve assembly
with float ball should be adjusted to set the water operating level as follows:
Tower Model # Operating level (from
bottom of sump)
All Towers
10 inches
• Access the make-up valve through the window louver marked “Access Panel”.
• A lower water level than recommended may cause air to be drawn into the tower outlet
piping and cause pump "cavitation."
• A water level higher than recommended will cause continuous overflow and waste of water
as a result of potential “pull-down” from the piping when the system is shut down.
• The overflow should NEVER be capped, or its elevation altered by raising external piping.
Note: On gravity drain cooling tower(s), make-up assembly, overflow, drain and vortex breaker
are not provided.