Twin City Fans With CE Mark - ES-2-06 - Manual (Page 3)

3. Twin.City.Fan.Engineering.Supplement.2-06
sleeve. with. a. diameter. of. 2. to. 21⁄2. times. the. anchor.
bolt.diameter.should.be.provided.around.the.anchor.bolt.
for. final. adjustment. (see. Figure. 2).. The. mounting. sur-
face.of.the.foundation.should.be.smooth.for.good.shim.
contact..When.deciding.the.thickness.of.the.foundation,.
approximately.25.to.40mm.height.should.be.allowed.for.
shimming,.grouting,.leveling,.washers,.nuts,.etc.
. The.foundation.plan.on.the.customer.submittal.draw-
ing. indicates. the. mounting. hole. size. and. locations. on.
the.fan.
.
If.a.structural.steel.base.or.platform.is.to.be.used,.the.
structure. must. be. designed. for. the. weight. of. the. fan,.
live.loads.imposed.by.rotation.of.the.rotor.and.driver,.
and. any. external. live. loads.. The. structure. should. be.
designed.to.ensure.that.no.natural.frequency.will.occur.
within.30%.of.the.fan.speed..This.is.especially.true.if.
the.structure.supports.more.than.one.fan.
. Any. ducting. should. have. independent. support.. Do.
not. use. the. fan. to. support. ducting.. The. fan. frame.
can.be.designed.to.carry.some.external.loads..Consult.
the. factory. if. this. is. a. concern.. Isolating. the. fan. from.
ductwork. with. flex. connections. eliminates. transmission.
of.vibration..Fans.handling.hot.gases.require.expansion.
joints.at.both.the.inlet.and.discharge.to.prevent.exces-
sive. loads. caused. by. thermal. growth.. Refer. to. AMCA.
Publication.201.for.good.practices.in.ductwork.geometry.
and. configuration.. When. possible,. ductwork. shall. be.
located. where. there. is. least. risk. of. personnel. tripping,.
walking.into.or.falling.over.the.ductwork..If.not.possible,.
warnings.shall.identify.this.hazard.
. See. Appendix. A. Commercial. Ventilator. Installation.
Instructions.for.commercial.ventilator.foundation.details.
. Fans.should.not.be.located.underneath.other.machin-
ery.where.there.might.be.a.risk.of.harmful.liquid.falling.
onto.fans.from.above.
. Fans.should.be.installed.where.they.are.readily.acces-
sible.to.maintenance.personnel,.so.that.such.personnel.
are.not.required.to.stoop.or.crawl.to.access.fans.
Figure 2. Typical Foundation Section
Fan Installation - Factory Assembled Units
General instructions for industrial centrifugal fans – For Axial
fans and commercial ventilators, follow steps below noting
instructions specific to those fan types in Appendix A and B.
Follow.proper.handling.instructions.as.given.earlier.
.1.. Move.the.fan.to.the.final.mounting.position.
.2.. Remove.skid,.crates.and.packing.materials.carefully.
.3.. If. vibration. isolation. is. to. be. used,. place. isolation.
base.on.mounting.bolts..Line.up.holes.in.fan.base.
with. bolts. as. indicated. on. the. foundation. plan. of.
the.customer.submittal.drawing.
.4.. Consult. each. specific. fan’s. submittal. drawing. for.
proper.installation.arrangement.and.mounting.dimen-
sions..Place.the.fan.on.mounting.structure..Carefully.
level. the. unit. (checking. the. level. on. the. shaft). on.
the.foundation.and.shim.as.necessary.using.stain-
less.steel.shims.on.both.sides.of.each.anchor.bolt..
Anchor.bolts.are.to.be.pre-tensioned.per.Table.1..
For. metric. grade. bolts. or. materials. not. shown. in.
Table.1,.check.with.bolt.manufacturer.for.the.proper.
torque.. (See. details. specific. to. commercial. ventila-
tors.in.appendix.A.for.this.step).
.5.. Check. the. alignment. of. the. bearings.. Shim. or.
reposition. the. bearings. if. necessary.. In. many. split.
housing. roller. bearings,. the. gap. between. the. seal.
carrier.and.housing.can.be.measured.with.a.feeler.
gage..The.variation.in.this.gap.should.be.less.than.
half.of.the.maximum.gap.measured..In.roller.bear-
ings. where. this. gap. is. not. visible,. alignment. can.
be. verified. by. verifying. the. bearing. is. square. with.
the.pedestal.top..In.ball.bearings,.the.bearing.outer.
ring.swivels.in.the.housing.to.accommodate.a.small.
amount.of.misalignment..Verify.bearing.set.screws,.
cap.bolts,.and.collars.are.tightened.per.Tables.2a,.
2b.and.2c.
.6.. Check.face.alignment.of.sheaves.on.belt.driven.fans..
Parallel.alignment.should.be.within.5mm.per.meter.of.
center.distance..Angular.Misalignment.should.be.less.
than. 1. degree.. Check. and. record. tension. of. belts.
to.see.if.it.is.sufficient..Proper.belt.tension.is.speci-
fied.on.the.included.datasheet..If.belt.tension.needs.
adjustment,. instructions. on. belt. tensioning. are. given.
in.the.Drive.Mounting.section.of.this.manual..Sheaves.
on.belt.driven.fans.are.often.provided.with.taperlock.
bushings..When.tightening.bushing.bolts,.proceed.in.a.
progressive.manner.to.avoid.cocking.the.tapered.sur-
faces.between.the.bushing.and.the.sheave..Bushing.
bolt.torque.specifications.are.indicated.in.Table.3.
.7.. Check. alignment. of. factory. mounted. couplings,. as.
they. are. subject. to. misalignment. during. shipment..
Realign.if.necessary.in.accordance.with.the.instruc-
tions.which.are.included.with.the.shipment.. NOTE:
Most.couplings.need.lubrication.
.8.. Make.sure.there.is.no.rubbing.or.binding.and.that.
the.wheel-inlet.cone.or.wheel.to.fan.housing.clear-
ances. and. overlap. are. correct.. Overlap. values. or.
other.dimensions.to.verify.proper.wheel.location.are.
given.in.the.included.documentation.specific.to.the.
fan.. Wheel. clearance. should. be. verified. to. match.
the.specified.value.and.be.uniform..The.measured.
values.should.be.recorded.
.9.. Check.the.tightness.of.the.wheel.on.the.shaft.per.
Table.4..The.measured.torque.should.be.recorded.
10..Check. the. tightness. of. foundation. bolts,. motor.
mounting. bolts,. and. bearing. mounting. bolts. per.
Table.1..For.metric.bolts.or.grades.not.specified.in.
Table. 1,. check. proper. torque. values. per. the. bolt.
manufacture.
NOTES:
1..
Temporary.form.for.grout.pouring.
2.. Hex.nut,.split.ring.lock.washer.and.tapered.or.flat.washer.
3.. 1".to.1.5".grout.allowance.to.be.filled.with.nonshrinking.machin-
ery.grout.
4.. Pipe-bolt.sleeve.diameter.2.to.2 1 / 2 .times.bolt.diameter.for.cor-
rection.of.alignment.errors.
5.. Care. should. be. taken. that. anchor. bolt. sleeves. are. filled. with.
grout.
6.. J-Bolt.leg.should.be.fastened.to.foundation.rebar.
7.. Shimming.surface.to.be.smooth,.level,.dressed.if.necessary.
8.. Full.width.stainless.steel.shims.
9.. Fan.base.angle.or.structural.steel.
10.. Leveling.nut,.if.used,.should.be.backed.off.after.shimming.for.
final.tightening.of.hex.nuts.