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Revised 1-8-2007
12
• The maximum operating inlet water temperature should not exceed 140° F.
CAUTION:
When stepping on top of the fill, distribute the body weight by means of two plywood plates as
described earlier in these instructions.
Fan and Mechanical Drive System and Its Maintenance
Safety
Follow all safety instructions previously discussed.
Motor:
• The standard motor is a totally enclosed motor , Class F insulation, 1.15 minimum service
factor, epoxy coating on outside frame, and is specifically designed for cooling tower duty to
the exclusive specifications of Delta Cooling Towers.
• Should there be a problem with the motor, which may be covered under our standard
warranty, the motor must only be inspected and serviced by an authorized motor
manufactures warranty shop, and Delta Cooling Towers, Inc. must be notified, otherwise the
warranty is void.
• If the motor bearings have grease fittings, follow the lubrication recommendations as
outlined in instructions from motor manufacturer. The majority of motors do not require
greasing.
Start-up Instructions
Complete all start-up instructions before applying heat load.
• Clean any accumulated debris or packaging material from inside tower sump.
• Check to be sure that the fan motor is properly wired for correct rotation as viewed from the
top of the fan. Reverse leads will cause incorrect rotation and reverse direction of airflow.
Note: Fan rotation should always agree with rotation labels. Standard fan rotation is
clockwise, (C.W.) however; non-standard fans may be designed to rotate counter
clockwise, (C.C.W.)
• Check for free rotation of the fan and fan blade tip clearance.
• Fill the cooling tower sump or the cold water storage reservoir on gravity drain applications.
• Water recirculation pump should be primed and all piping below the tower sump filled with
water. Check pump for proper shaft rotation.
• Start water recirculation pump and adjust flow to design. A flow metering device installed in
the inlet is recommended but if not available, use the pressure differential across the pump in
conjunction with the pump curve.