Twin City Centrifugal Fans - ES-52 - Manual (Page 3)

Twin City Engineering Supplement ES-52 3
Additional.instructions.may.be.given.for.some.fan.models,.
components.and.accessories.in.the.appendix.
Fan Installation – Disassembled Units
A. unit. is. considered. “disassembled”. if. any. component.
required.for.proper.operation.is.shipped.or.supplied.sepa-
rately.or.in.pieces..Reference.earlier.instructions.concerning.
proper.handling.of.fan.components.
Instructions.for.Mounting.and.Assembly.of.Unit:
1..Move.lower.housing/framework.to.mounting.location.
2..If.vibration.pads.or.bases.are.used,.place.on.bolts.first..
Place.lower.housing.assembly.onto.bolts.
3..Level.and.shim.if.required..Bolt.into.place.
4..If.separated.pedestal.or.bearing.pedestal:
a..Bring.bearing.pedestal.to.desired.location.
b..Place. any. vibration. base. or. pads. into. place.. Set.
bearing.pedestal.on.bolts.
c..Never.distort.bearing.pedestal.by.forcing.it.to.align.
with.a.non-level.surface..Shim.beneath.the.pedestal.
as.required.
d..Check. bearing. centerline. height.. Change. centerline.
height. to. match. centerline. height. of. housing.. High.
temperature.units.may.require.the.housing.centerline.
to. be. lower. when. cold. so. that. it. will. be. centered.
when.hot.
e..Measure. from. housing. to. bearing. pedestal. to. bring.
bearing. pedestal. into. square. with. housing. (a. large.
square.may.also.suffice).
f... Bolt.into.position.
5..Shaft.and.wheel.assembly.preparation:
a..Clean. protective. coating. off. shaft. with. solvent.. Do..
not.touch.clean.areas.of.shaft.with.hands..Perspiration.
can.cause.rust.or.pitting.over.time.
b..Remove.keys.from.shaft.
c..Clean.inside.of.wheel.bore.with.solvent..Make.sure.
setscrews.will.not.interfere.when.inserting.shaft.into.
wheel.bore.
6..Arrangement. 1,. 9. or. 10:. Drive. Component. Assembly.
(See.Figure.3):
a..Insert.shaft.into.wheel.from.back.side.of.wheel.
b..When. shaft. is. flush. with. wheel. hub,. put. key. into..
keyway.and.tighten.wheel.setscrews.
c..Insert. shaft. through. opening. in. drive. side.. (If. split.
housed.unit,.lower.into.position.)
d..Install. bearings. onto. shaft.. Do. not. tighten. bearing.
setscrews. at. this. time.. The. bearing. housing. should.
be.perpendicular.and.the.bearing.base.parallel.to.the.
axis.of.the.shaft.to.prevent.loads.caused.by.misalign-
ment.
e..Mount.assembly,.bolt.bearings.to.drive.stand..Shaft.
Figure 3. Drive Component Assembly
must. be. parallel. with. side. of. bearing. pedestal..
Precision. shim. bearings. as. required.. After. aligning.
and.bolting.bearings.to.pedestal,.lock.bearings..Be.
sure. expansion. bearing. (if. supplied). is. set. to. allow.
for.growth..Continue.with.step.8.
7..Arrangement.3.(Split-housed).units.(See.Figure.4):
a..Parts.on.DWDI.units.are.assembled.in.the.following.
order. as. viewed. from. opposite. drive. side:. Bearing.
bar. assembly. and. opposite. bearing,. funnel,. (hous-
ing. side),. wheel,. (housing. side),. funnel,. drive. side.
bearing. bar. assembly,. drive. bearing. and. sheaves..
Mount. bearing. bar. assembly. to. housing.. Center.
wheel.in.funnels.
b..Parts.on.SWSI.units.are.assembled.in.the.following.
order. as. viewed. from. opposite. drive. side:. Bearing.
bar.assembly.and.opposite.bearing,.funnel,.(housing.
side),. wheel,. (housing. side),. drive. side. bearing. bar.
assembly,.drive.bearing.and.sheaves..Mount.bearing.
bar. assembly. to. housing.. (See. Figure. 7. for. wheel-
funnel.overlap.)
c..Assemble.parts.in.above.order.on.shaft.
d.. Move. assembly. into. position.. Lightly. bolt. bearings.
into.place.
e.. Shaft. should. be. parallel. with. discharge. of. housing..
Move.bearings.to.accommodate.
f... Level.shaft;.shim.bearings.if.required..Lock.bearings..
Be.sure.expansion.bearing.(if.supplied).is.set.to.allow.
for.shaft.growth.
8..Install. motor. on. base.. Carefully. align. shafts. for. drive.
installation.
9..Mount.drives.as.follows:
a..Slip.(do.not.pound).
proper.sheave.
onto.correspond-
ing.shaft..CAUTION:.
PLACING.FAN.
SHEAVE.ON.MOTOR.
CAN.OVERSPEED.
WHEEL.AND.CAUSE.
STRUCTURAL.
FAILURE.
b..Position. sheaves.
so. they. are. placed.
on. motor. shaft. and.
fan. shaft. as. close.
as. possible. to. the.
motor. and/or. bear-
ing.. Sheave. must. be.
placed. so. that. it. does. not. rub. on. the. bearing,.
motor.guard.or.other.structures..On.keyed.shafts,.
Shaft
Centerline
Bearing
Pedestal
Sheave
Bearing
Inlet Funnel
Housing Side
Wheel
Assembled Bearing,
Shaft, Funnel, and
Housing. Frame
Angles Not Shown.
Figure 4. Split-housed Drive Component Assembly
SHEAVE LINED
UP WITH END
OF KEYWAY
RUN OUT
RUN OUT OF
KEYWAY
KEYWAY LENGTH
Figure 5. Sheave Position