Maintenance
Seasonal Shutdown Instructions
When the system is to be shut down for an extended period of time, it is recommended that the entire system (cooling tower, system piping, heat exchangers, etc.) be drained. Leave the basin drains open.
During shutdown, clean the tower (see Warning, page 20) and make any necessary repairs. Pay particular attention to mechanical equipment.
Following each year’s shutdown and cleaning, inspect the tower’s metal surfaces for evidence of the need to apply a protective coating. Do not misinterpret
To the extent that the galvanizing (zinc coating) still exists, paint will not adhere to it readily. Contact the manufacturer of the coating you intend to use for instructions.
Tower framework: Check structural bolted connections and tighten as required.
Fans: Check fan assembly bolting and tighten as required. Use torque settings prescribed in the fan manual.
Fiberglass Components: Check all fiberglass parts for exposed glass fibers. If found, the affected surfaces should be recoated using a two- part polyamide epoxy primer to promote adhesion and a
Fan shaft bearings: Lubricate fan shaft bearings at close of each operat- ing
Electric motors: Clean and lubricate motor at close of each operating season (refer to motor manufacturer’s recommendations.) Check motor anchor bolts and tighten as required.
Do not start motor before determining that there will be no interfer- ence with free rotation of the fan drive.
The motor should be operated for three hours at least once a month. This serves to dry out windings and
At start of new operating season, make sure bearings are adequately
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