10
operation
Starting and Operating Instructions
Microorganisms including Legionella bacteria can exist in premise
plumbing including cooling towers. The development of an effective
water management plan (WMP) and implementation of maintenance
procedures are essential to prevent the presence, dissemination and
amplification of Legionella bacteria and other waterborne contami-
nants throughout premise plumbing. Before operating the cooling
tower, the water management plan and maintenance procedures
must be in place and regularly practiced.
1. Consult a knowledgeable water treatment professional to clean and treat
your new cooling tower prior to startup. Cooling towers must be cleaned
and disinfected regularly in accordance with local public health services
and recommendations.
2. Do NOT attempt any service unless the fan motor is locked out.
3. Clean all debris, such as leaves and dirt from the cooling tower fill and
basin.
4. Fill the circulating system with water. The cold water basin should be filled
with water until level is at the rim of the overflow.
The water conditions during the initial tower operation are crucial in pre-
venting premature corrosion of galvanized steel (white rust). For at least
the first eight weeks of operation, pH should be controlled between 6.5
and 8.0 with hardness and alkalinity levels between 100 and 300 mg/L
(expressed as CaCO
3
).
If tower is equipped with a standard side-suction connection, vent
any accumulated 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.
5. Start your pump(s). Observe system operation. Since the water system
external to the tower will have been filled only to the level in the cold water
basin, some “pump-down” of the basin water level will occur before water
completes the circuit and begins to fall from the fill. The initial pump-down
may not be enough to cause the float valve to open. However, you can
check its operation by pressing down on the operating lever. Adjust the
Warning
Note
