BAC 3872C User Manual

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17
Detailed Component
Maintenance
Procedures
Fan Drive System
Optional Gear Drive System
Fan Motors
Inspection & Maintenance
Adjustable Motor Base
Fan Shaft Bearings
Inspection & Maintenance
Fan Motors
Series3000CoolingTowersusecoolingtowerduty,premiumefcient,totallyenclosed,
motor(s).
Inspection & Maintenance
• Cleantheoutsideofthemotoratleastquarterlytoensurepropermotorcooling.
• Afterprolongedshutdowns,checkthemotorinsulationwithaninsulationtesterprior
torestartingthemotor.
• Checkthemotorvoltageandcurrentfollowingstart-upandeverythreemonthswhile
inoperation.
Adjustable Motor Base
Coatthemotorbaseslidesandadjustingscrewspriortostart-up,everythreemonthswhile
inoperation,andfollowingshutdown.Usegoodqualitycorrosioninhibitinggreasesuchas
oneofthoserecommendedforlubricatingthefanshaftbearingsonpage 17.
Fan Shaft Bearings
Twopillowblockballbearingssupportthefanshaft.Eachbearingisequippedwitha
lubricationttingandaslinger/lockingcollartokeepoutmoisture.
Inspection & Maintenance
• OnlylubricatethebearingswithamanualgreasegunorBAC’soptionalAutomatic
BearingGreaser.Donotusehigh-pressuregreasegunssincetheymayrupturethe
bearingseals.
• Onlylubricatethebearingswithoneofthefollowingcompatiblewaterresistant
greaseswhicharesuitableforambienttemperaturesrangingfrom-65ºF(-53.9ºC)to
+250ºF(121.1ºC).
– Amoco-RyconPremium#3
– Chevron-SRI
– Citgo-PolyureaMP2™
– Conoco-Polyurea2™
– Exxon-Polyrex
®
EM
– Exxon-UnirexN™
– MobilGrease
®
-AW2
– Shell-AlvaniaRL3™
– Shell-Alvania#3
– Shell-Dolium“R”
– SKF-LGHP2™
– Unocal76-UnilifeGrease™
ATTENTION: Check to ensure the
controls for the fan motor are set
to allow a maximum of six on-off
cycles per hour to prevent motor
overload.
NOTE: Gear oils containing extreme
pressure (EP) additives are not
recommended, and should never be
used on cooling towers with gear
drives.
NOTE: For programming, operation,
and trouble shooting of the greaser,
consult the user manual shipped
with the greaser. This manual is
also available through your local
BAC Representative.

BAC 3872C Specifications

General

Brand	BAC
Model	3872C
Category	Air Conditioner
Language	English