Twin City Fans With CE Mark - ES-2-06 - Manual (Page 12)

12. Twin.City.Fan.Engineering.Supplement.2-06
Operation Checklist
□
Verify.that.proper.safety.precautions.have.been.followed.
□
. Electrical.power.must.be.locked.off.
Check.fan.mechanism.components:
□
Nuts,.bolts,.setscrews.are.tight.per.Tables.1.-.4.
□
Mounting.connections.are.properly.made.and.tightened.
□
Bearings.are.properly.lubricated.
□
Wheel,.drives.and.fan.surfaces.are.clean.and.tightened.
□
Rotating.assembly.turns.freely.and.does.not.rub.
□
Drives.on.correct.shafts,.properly.aligned,.and.prop-
. erly.tensioned.
□
Check.that.no.foreign.objects.are.in.the.fan.or..
. ductwork.
Check.fan.electrical.components:
□
Motor.is.wired.for.proper.supply.voltage.
□
Motor.was.properly.sized.for.power.of.rotating.assembly.
□
Motor.is.properly.grounded.
□
All.leads.are.properly.insulated.
□
Resistance.between.motor.windings.and.earth.is.over..
. 10.megohms.(see.motor.maintenance.section).
□
Control.equipment.is.functioning.properly.
Trial.“bump”:
□
Turn. on. power. just. long. enough. to. start. assembly.
rotating.
□
Check.rotation.for.agreement.with.rotation.arrow
□
Listen.for.any.unusual.noise.
Run.unit.up.to.speed:
□
Bearing. temperatures. are. acceptable. (<200°F,. 93°C).
after.one.to.two.hours.of.operation.
□
Check.for.excess.levels.of.vibration..Filter.in.readings.
should.be.7.2.mm/s.RMS.or.less.
□
Check. that. motor. current. draw. is. not. above. the.
nameplate.value.
After.one.week.of.operation:
□ Check. all. nuts,. bolts. and. setscrews. and. tighten. if.
necessary.
□
Readjust.drive.tension.if.necessary..(See.Table.5.for.
drive.maintenance.schedule.)
Optional Accessories
1.. Turning Gear —. A. turning. gear. is. sometimes. used.
in. high. temperature. applications. where. the. fan. is.
exposed.to.high.temperature.gases.while.not.operat-
ing..The.wheel.and.shaft.can.expand.unevenly.due.
to.the.temperature.when.sitting.idle,.which.can.cause.
vibration. at. startup. and/or. a. permanent. set. to. the.
rotor..The.turning.gear.slowly.turns.the.fan.from.the.
outboard.side.while.it.is.not.operating,.providing.for.
even.thermal.expansion..It.starts.automatically.when.
the. fan. shuts. down. and. disengages. automatically.
when.the.fan.starts.up.again..More.specific.informa-
tion.will.be.provided.for.each.application.
2.. Shaft Seals —.The.standard.shaft.seal.is.a.ceramic.
fiber. element. retained. with. an. aluminum. retaining.
plate. and. clips.. Other. configurations. of. shaft. seals.
are.available.for.special.applications,.such.as.when.it.
is.necessary.to.keep.the.shaft.seal.as.gas.tight.as.
possible..Shaft.seal.application.manuals.are.provided.
in.Engineering.Supplement.ES-595.
3.. Variable Inlet Vanes —.Variable.inlet.vanes.are.pro-
vided. as. assemblies. internally. in. the. inlet. cone. or.
externally.in.a.flanged.cylinder..The.vanes.are.used.to.
control.volume.and.save.power.in.installations.where.
different. volumetric. operating. conditions. are. used..
Installation. manuals. are. provided. in. other. engineer-
ing.supplements.for.specific.fan.types..Variable.inlet.
vanes. may. be. provided. with. powered. operators. in.
which.case.the.manufacturer’s.installation.and.operat-
ing.manuals.will.be.provided.
4.. Inlet Box and Inlet Box Dampers —.Inlet.boxes.may.
be. provided. to. allow. transition. from. a. duct. to. the.
fan.inlet..Inlet.box.dampers.may.also.be.provided.for.
volumetric.regulation.similar.to.inlet.vanes..Dampers.
are.usually.provided.as.a.complete.assembly.and.are.
installed. with. the. damper. axles. parallel. to. the. fan.
shaft..They.should.be.installed.to.pre-spin.the.air.in.
the.direction.of.fan.rotation..See.Figure.7.
5.. Outlet Dampers — Outlet.dampers.are.usually.provided.
completely.assembled.like.the.inlet.dampers..The.damp-
er.is.bolted.to.the.fan.discharge.for.volume.control.
6.. Shaft Cooler —. Also. referred. to. as. “heat. slingers”.
or.“cooling.wheels,”.these.are.small,.radially.bladed.
aluminum.wheels.that.are.split.and.bolted.for.instal-
lation.between.the.inboard.bearing.and.fan.housing..
The. backplate. usually. is. closest. to. the. fan. housing.
and.the.blades.face.the.bearing..Specific.instructions.
will.be.provided.by.application.
7.. Oil Circulating Systems —.Usually.the.following.modi-
fications. will. have. to. be. made. to. the. bearing. if. an.
oil. circulating. system. is. used.. When. an. oil. circulat-
ing.system.is.included,.a.manual.for.its.installation,.
operation,.and.maintenance.will.accompany.it.
. a..Four.drain.holes.will.be.drilled.in.the.bearing,.two.
on.each.side.of.the.bearing..Because.of.this,.the.
bearing. may. be. drained. from. either. side.. (Drain.
from.both.holes.on.one.side.of.the.bearing.)
. b..It.is.not.necessary.to.drain.the.bearing.
. c..The. bearing. will. be. packed. with. grease. to. prevent.
corrosion. until. installed. and. started. up.. The. drain.
holes.will.be.plugged.with.plastic.covers.to.make.sure.
they. are. open.. The customer MUST REMOVE most
of the grease using solvent and remove the plastic
covers prior to starting the oil circulating system.
. d..A.wet.sump.will.be.added.in.case.of.circulating.
oil.pump.failure..Seals.will.be.provided.to.accom-
modate.the.resultant.splashing.
. e..The. zerk. on. top. of. the. bearing. will. be. removed.
for.that.hole.to.be.used.as.the.oil.inlet.
Troubleshooting Guidelines
Use. current. safety. practices. when. investigating. fan. or.
system. performance. problems.. General. safe. practices.
and. performance. troubleshooting. guidelines. can. be.
found.in.AMCA.Publications.410.and.202,.respectively..
Fan. application.and. field.measurement.procedures.can.
be.found.in.AMCA.Publications.201.and.203.
. Below.is.a.list.of.possible.areas.to.check.when.air.
or. sound. values. do. not. match. expectations.. Most. fan.
problems. can. be. pinpointed. to. one. of. these. common.
causes.
RIGHT WRONG
Figure 7.Orientation of Damper Blades As Related to Fan Rotation