Aerovent ES-3-09 - Manual (Page 2)

Duct Connections
Fans.with.duct.connections.must.allow.for.inspection.of.
critical.clearances.between.rotating.and.stationary.parts.
and.must.allow.for.cleaning..Inlet.and.outlet.ducts.must.
have.sufficient.access.doors.to.allow.for.inspection.iden-
tified.in.this.bulletin.as.well.as.in.ES-2-06.
. The.layout.of.the.inlet.ducting.must.assure.that.the.
air.entering.the.fan.is.sufficiently.mixed.with.regards.to.
temperature.. Localized. hot. sections. of. the. air. stream.
could.become.a.hazard.if.they.are.at.a.higher.tempera-
ture.than.the.equipment.was.evaluated.for.
. Ducting.shall.be.so.arranged.that.the.fan.is.not.posi-
tioned.at.a.“low.point”.where.it.is.possible.for.foreign.
objects. or. liquid. to. lodge.. See. ES-2-06. for. additional.
duct.connection.requirements.
Guards and Enclosures
ATEX. fans. must. be. protected. to. at. least. IP20. of.
EN. 60529. against. the. ingress. of. foreign. particles.. To.
achieve.this,.the.mesh.size.used.for.guarding.must.not.
allow.particles.greater.than.12.5.mm.to.pass..A.mesh.
of. this. size. can. negatively. impact. fan. performance.. If.
it.is.possible.to.achieve.this.protection.for.the.fan.by.
using.a.mesh.located.away.from.the.fan.inlet.and.in.a.
lower.velocity.section.of.ductwork,.then.losses.due.to.
the.added.mesh.can.be.minimized...
. See. ES-2-06. for. additional. guard. and. enclosure.
requirements.
Electrical Supply and Controls
Electrical. equipment. for. ATEX. fans. must. comply. with.
an. equipment. group,. category. and. zone. according. to.
EN.60079-0.or.EN.50281-1-1.that.is.appropriate.for.the.
fan.it.is.driving./.monitoring.and.is.appropriate.for.the.
specific.environmental.conditions.at.the.place.of.instal-
lation.
. Any.monitoring.devices.used.must.be.checked.regu-
larly.to.assure.proper.operation.
. The.manufacturers’.instructions.for.all.electrical.sup-
ply,. controls. and. equipment. must. be. followed.. This. is.
particularly.important.in.the.case.of.thermally.protected.
motors.
. See.ES-2-06.for.additional.electrical.supply.and.con-
trol.requirements.
Vibration
Vibration. monitoring. is. mandatory. for. fans. that. are.
Category. 2D. in. the. airstream.. Alarm. shutdown. levels.
shall.meet.the.requirements.of.ISO.14694.
. See.ES-2-06.for.additional.vibration.considerations.
Maintenance
Safe.operation.of.ATEX.fans.rely.on.clearances.between.
rotating. and. stationary. parts. being. maintained.. These.
clearances.can.be.reduced.due.to.layers.of.combustible.
or.non-combustible.materials..Every.fan.must.be.inspect-
ed.regularly.and.cleaned.as.needed.to.avoid.a.buildup.
of. materials.. The. required. frequency. of. inspection. and.
cleaning. will. vary. based. on. application;. therefore. the.
user. must. determine. the. frequency. of. inspection. and.
cleaning.required.to.avoid.a.buildup.of.materials.
. Belt.drives.may.become.a.source.of.hazardous.tem-
peratures.if.they.are.not.tensioned.or.aligned.properly...
Drives. must. be. aligned. as. indicated. in. ES-2-06. and.
tensioned.as.indicated.on.datasheet.SF.5003.supplied.
by. Aerovent.. Replacement. belts. must. be. identical. to.
those.originally.supplied.
. Rotating.components.may.be.grounded.through.anti-
friction.bearings..Bearings.must.be.checked.and.if.nec-
essary.replaced.after.a.voltage.spike.or.similar.electrical.
incident.
. See. ES-2-06. for. additional. maintenance. require-
ments.
Fan Operation
Proper Use and Application
It. is. critical. that. ATEX. fans. are. used. as. intended. and.
in.accordance.with.the.limits.and.markings.of.the.fans...
ATEX. fans. are. supplied. with. a. datasheet. indicating. the.
operation. limits.. Operation. outside. of. these. limits. may.
cause.an.explosion.hazard.
. Operating. within. acceptable. vibration. levels. is. critical.
to.obtain.the.expected.life.of.the.fan.and.components..
Vibration.levels.must.be.in.conformance.with.ISO.14694..
In.addition,.fans.must.not.be.subject.to.external.vibration.
either.while.at.rest.or.during.operation.
. See.ES-2-06.for.additional.information.on.proper.use.
and.application.
Sound
See.ES-2-06.for.considerations.regarding.sound.
Operation Checklist
Required.clearances.between.rotating.and.stationary.parts.
must.be.verified.before.starting.the.fan..Clearances.indi-
cated.in.“ATEX.–.FAN.CLEARANCES.CHECKLIST”.must.
be. verified. with. the. fan. and. ductwork. installed. before.
startup..Form.“ATEX.–.FAN.CLEARANCES.CHECKLIST”.
is. specific. to. each. fan. and. is. included. with. the. ship-
ment. of. each. fan.. The. measured. clearances. should. be.
recorded. and. compared. to. the. design. minimum. values.
to.verify.that.the.design.requirements.are.met.before.the.
fan.is.started.
. See. ES-2-06. for. additional. items. in. the. operation.
checklist.
Troubleshooting Guidelines
See.ES-2-06.for.troubleshooting.guidelines.
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