User manual
33
Maintenance
Draining the coil is not recommended—draining promotes corro-
sion inside the coil tubes. See protecting coil in Freezing weather
on page 18.
During shutdown, clean the fluid cooler (see Warning, page 21) and make any
necessary repairs. Eliminators and louvers are easily removed to gain access
to the coil. Pay particular attention to mechanical equipment supports and
sheaves or coupling (or drive shafts).
Following each year’s shutdown and cleaning, inspect the fluid cooler’s metal
surfaces for evidence of the need to apply a protective coating. Do not misin-
terpret grime as a need to have the tower painted. If relatively bright metal can
be exposed by cleaning, consider that the galvanizing has remained effective.
Unless there is evidence of a generalized failure of the galvanizing, localized
touch-up should be all that is required.
Totheextentthatthegalvanizing(zinccoating)stillexists,paint
will not adhere to it readily. Contact the manufacturer of the coating
you intend to use for instructions.
Fluid cooler framework: Check structural bolted connections and tighten
as required.
Fans: Check fan assembly bolting and tighten as required. Use torque values
prescribed in the Fan User Manual.
Fans shaft bearings: If equipped, lubricate fan shaft bearings at close of
each operating season—see page 26.
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. See Page 28 for fluid coolers with motor located
outside the plenum option.
Do not start motor before determining that there will be no interfer-
ence with free rotation of the fan drive.
The motor(s) should be operated for three hours at least once a month.
This serves to dry out windings and re-lubricate bearing surfaces (refer to
the Marley “Electric Motor User Manual” Manual 92-1475 available at
spxcooling.com.
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Caution
Note
Caution