Twin City Aero Acoustic Diffuser - ES-409 - Manual (Page 3)

3 Twin.City.Engineering.Supplement.409
6..Attach.mounting.brackets.to.diffuser.using. 1 /
4
".self-
tapping.screws..Make.sure.that.the.narrower.end.is.
installed.on.diffuser.and.that.the.wider.end.is.inside.
the.fan.frame.(see.Figure.5).
7..Attach. mounting. brackets. to. fan. frame. using. the.
existing. slots. or. the. holes. drilled. in. Step. 1.. Hand-
tighten. 3 /
8
".bolts.and.nuts.(see.Figure.5).
8..Align.diffuser.as.shown.in.Figure.3.and.fully.tighten.
all.hardware..Motor.or.bearings.may.need.adjusting.
(see.Figure.3).
Aero Acoustic Diffuser™ Operation -
Safety
For. general. safety. practices. for. air. moving. equipment,.
see.AMCA.Bulletin.410.
. Twin.City.Fan.&.Blower.has.many.safety.accessories.
available..These.safety.devices.include.(but.are.not.lim-
ited. to). belt. guards,. shaft. guards,. inlet. and. discharge.
screens..The.use,.abuse.or.non-use.of.safety.devices.is.
the.responsibility.of.the.purchaser.
. Facility-related.safety.conditions.include.fan.accessi-
bility.and.location..How.easily.can.non-service.personnel.
access.the.unit?.Is.the.fan.in.a.hazardous.duty.environ-
ment?.Was.the.unit.ordered.for.this.duty?.Other.con-
cerns. must. also. be. addressed.. All. fans. should. be.
powered.through.switches.which.are.easily.accessible.to.
service.personnel.from.the.fan..Every.switch.should.have.
the.ability.to.be.“locked-off”.by.the.service.person.and.
the.key.to.be.retained.by.this.person.to.prevent.acci-
dental.power.of.the.fan.while.service.is.in.process.
WARNING: NEVER INSTALL, ASSEMBLE, ADJUST OR
REMOVE Aero Acoustic Diffuser™ while fan is in opera-
tion. Twin City Fan & Blower requires fan to be “locked-
off” while any maintenance is performed.
Operation Checklist
□.Verify.that.proper.safety.precautions.have.been...............
..followed.
□ Electrical.power.must.be.locked.off.
Check.fan.mechanism.components:
□ Aero.Acoustic.Diffuser™.connections.are.properly.
.made.and.tightened.
□ Aero.Acoustic.Diffuser™.sections.are.properly.
..assembled.and.tightened.
□ Impeller.and.Aero.Acoustic.Diffuser™.surfaces.are.
..clean.and.free.of.debris.
□ Rotate.the.impeller.by.hand.to.verify.it.has.not.shifted.
..in.transit.or.assembly.
□ Check.Aero.Acoustic.Diffuser™./.impeller.alignment..
..See.Figures.3.
□ Verify.backplate.and.frontplate.diffusers.are.on.correct.
..side.of.impeller.(not.reversed)..See.Figure.3.
□ Check.that.perforation.of.diffusers.are.on.the.airpath.
..side.impeller.
Trial.“bump”:
□ Turn. on. power. just. long. enough. to. start. assembly.
rotating.
□ Verify. the. impeller. and. Aero. Acoustic. Diffuser™.
assembly.do.not.rub.
□ Correct. any. problems. which. may. have. been. found.
(Follow. safety. guidelines. -. shut. power. off.). Perform.
checklist.again.until.unit.is.operating.properly.
□ Run.unit.up.to.speed.
Verify. fastener. tightness.. These. may. have. loosened.
during.shipment.or.installation:
□ After.one.week.of.operation,.check.all.nuts,.bolts.and.
..tighten.if.necessary.
Maintenance of Aero Acoustic Diffuser™
This. section. contains. general. maintenance. instructions.
for. your. Twin. City. Fan. &. Blower. Aero. Acoustic.
Diffuser™.
Aero Acoustic Diffuser™ Maintenance
Periodically.inspect.Aero.Acoustic.Diffuser™.for.signs.of.
excess.stress.or.fatigue..Clean.the.surfaces.when.appro-
priate..WARNING:.DO.NOT.APPLY.LIQUIDS.DIRECTLY.
TO.THE.AERO.ACOUSTIC.DIFFUSER™.AS.A.METHOD.
OF.CLEANING..DIRECT.APPLICATION.OF.LIQUIDS.CAN.
GENERATE.POTENTIALLY.HAZARDOUS.CONDITIONS.
Structural Maintenance
All.structural.components.or.devices.used.to.support.or.
attach.the.Aero.Acoustic.Diffuser™.to.the.fan.should.be.
checked.at.regular.intervals..Improper.mounting.can.lead.
to.poor.operation.characteristics.or.diffuser.fatigue.and.
failure.. Check. mounting. components. for. corrosion,.
cracks.or.other.signs.of.stress.