13
3. Remove any and all accumulated debris from tower. Pay particular atten-
tion to inside areas of cold water basin, louvers and drift eliminators. Make
sure that cold water suction screens are clear and properly installed.
4. Fill the water system to an approximate depth of 7" in the depressed area
of the cold water basin at the center of the tower. This is the recommended
operating water level. Adjust the float valve so that it is 75% open at that
level. Continue filling the system until the water reaches a level approxi-
mately
1
⁄
8
" below the lip of the overflow.
If tower is equipped with a side or end suction connection, vent ac-
cumulated air from the top of the suction hood by removing one or
both tap screws provided at that location. Replace these tap screws
when venting is complete.
The system pumps and piping connected to the cooling tower must
be configured such that the flowrate supplied to the water inlet of
each tower cell does not exceed the maximum design flowrate per
cell during startup, commissioning or operation. Overpumping will
result in elevated pressure levels in the tower’s water distribution
system - spray pressures exceeding 8.0 psi may damage the distri-
bution system.
5. Completely open all hot water flow control valves. Start your pump(s) and
observe system operation. Since the water system external to the tower
will have been filled only to the level achieved in the cold water basin, a
certain amount of “pump-down” of the basin water level will occur before
water completes the circuit and begins to fall from the fill. The amount
of initial pump-down may be insufficient to cause the float valve to open.
However, you can check its operation by pressing down on the operating
lever to which the stem of the float valve is attached.
Note
Caution
installation
