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3. Run the motor and observe the operation of the mechanical equipment.
Operation should be stable.
4. Check belt tension and torque on the fan and motor sheave after 10
to60hoursofoperation.SeeBushingFastenerTorqueValueson
page 25.
If the water supply system is not being operated—or if there is no
heat load on the system—motor amps read at this time may indicate
an apparent overload of as much as 10–20%. This is because of the
increased density of unheated air owing through the fan. Determi-
nation of an accurate motor load should await the application of the
design heat load.
Tower Start-Up
Among other sources, outbreaks of Legionnaires’ Disease have
reportedly been traced to cooling towers. Maintenance and water
treatment procedures that prevent amplication and dissemination
of Legionella and other airborne bacteria should be formulated and
implemented BEFORE systems are operated and continued regularly
thereafter to avoid the risk of sickness or death.
Water System:
1. New installations should be cleaned and treated with biocides by a
water treatment expert before startup.
2. Removeanyandallaccumulateddebrisfromtower.Payparticular
attention to inside areas of cold water basin, louvers and drift elimina-
tors. Make sure that cold water suction screens are clear and properly
installed.
3. 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 oat valve so that it
is 75% open at that level. Continue lling the system until the water
reaches a level approximately
1
⁄8" below the lip of the overow.
Installation
Note
Warning