Twin City Fans With CE Mark - ES-2-06 - Manual (Page 14)

14. Twin.City.Fan.Engineering.Supplement.2-06
Axial Fans - Securing the Wheel to the Shaft
If.the.propeller.is.removed.for.any.reason,.make.sure.that.
it.is.securely.attached.to.the.shaft.before.restarting.the.
fan..If.the.propeller.is.attached.to.the.shaft.by.means.of.
a. Trantorque. bushing,. use. the. tightening. torque. values.
shown.in.Table.6.below..For.other.bushings,.see.table.3.
for.proper.torque.values.
Axial Fans with Adjustable Blade Angles
The.blades.are.set.at.the.factory.to.the.blade.angle.that.
gives.the.performance.specified.on.the.order..This.angle.
should. be. checked. prior. to. start-up.. The. blade. angle.
should. not. be. changed. from. that. stated. for. the. order.
without. assuring. that. a. change. in. blade. angle. will. not.
overload.the.motor,.any.controls,.or.other.items..Vibration.
levels. shall. also. be. checked. in. accordance. with. ISO.
14694:2003,.“Industrial.Fans.–.Specifications.for.Balance.
Quality.and.Vibration.Levels”.if.any.change.is.made.to.
blade.angles.
Appendix B – Axial Fans
Blade Adjustment on Adjustable Pitch Vaneaxial
Type TCVX, VJ
The. patented. wheel. construction. uses. friction. and. cen-
trifugal.force.to.hold.the.blades.in.place..No.disassembly.
of.the.wheel.is.required.to.change.the.blade.angles..If.
it.is.necessary.to.change.the.blade.angle,.the.following.
procedure.should.be.used:
1..Work.safely..Make.sure.that.proper.safety.precautions.
have.been.followed..Electrical.power.must.be.locked.
off.
2..The.adjustment.can.be.made.through.the.inlet.on.open.
inlet.fans..On.fans.with.ducted.inlets,.open.the.wheel.
area.access.door.
3..Place.adjustment.tool.around.end.of.blade.(see.Figure.
10)..If.necessary,.apply.“cheater.bar”.around.the.11/4".
(31.75mm). diameter. end. for. additional. leverage.. The.
blades.can.be.turned.by.hand.on.open.inlet.fans..If.
additional.leverage.is.needed,.place.a.wrench.on.the.
leading.edge.of.the.blade.near.the.hub..Take.care.not.
to.mar.the.surface.of.the.blade.
Blade Adjustment on Type "E" Adjustable Pitch
Propeller
Preferred Method (more Accurate)
1..Lay.the.hub.on.a.horizontal.surface.with.the.concave.
(air.leaving).surfaces.of.the.blades.facing.upwards.
2..Loosen.the.blade.retaining.bolts.until.they.are.finger-
tight.. At. this. point,. the. blades. should. rotate. in. their.
sockets.when.grasped.firmly.and.twisted,.but.not.turn.
on.their.own.
3..Place.an.angle.meter.across.the.two.blade.angle.posi-
tion.marks.on.a.blade..See.Figure.11.
4..Twist.the.blade.to.the.desired.blade.angle.
5..Repeat.steps.3.and.4.for.the.remaining.blades.
Trantorque
Size
Shaft
Diameter
Socket
Size
Torque
Ft-Lb N-m
7/8 7/8 1-1/2 71 96
1-1/8 1-1/8 1-3/4 130 176
1-3/8 1-3/8 2 141 191
1-5/8 1-5/8 2-1/4 233 316
1-7/8 1-7/8 2-1/2 325 441
2-1/8 2-1/8 2-3/4 440 597
2-3/8 2-3/8 3 470 637
2-7/8 2-7/8 3-1/2 550 746
Table 6. Trantorque Bushing Torque Values
Note:.These.torque.values.are.to.be.obtained.with.a.calibrated.
torque.wrench..DO.NOT.apply.any.lubricant.to.any.part.of.the.
Trantorque
® . hub.. DO. NOT. use. an. anaerobic. thread. adhesive.
such.as.Loctite ® .on.the.threads.
Figure 9. Typical Hooded Roof Ventilator Installations
HINGED.HOOD
BOLTED.HOOD
SIZE.12".–.42".ACCESS
DOOR.FOR.INSPECTION
SIZE.48".–.60"
ACCESS.DOOR.FOR.DAMPER.
REMOVAL
SAFETY.SCREEN.STANDARD.
OPTIONAL.DAMPER.NOT.SHOWN.
OPTIONAL.DAMPER
Appendix A – Commercial Ventilator Installation instructions (cont'd)
Hooded Ventilators
Hooded. units. sizes. 12. to. 42. use. a. one-piece. hinged.
hood.. To. lift. the. hood,. remove. the. two. bolts. located.
under.the.mushroom.cap.and.prop.the.hood.up.with.the.
supplied.safety.rods..Push.and.lock.into.place..A.screw.
is.installed.at.the.end.of.the.pin.side.of.the.hinge.in.the.
hood.angle.to.prevent.accidental.removal.of.the.hood..To.
close.the.hood,.replace.the.bolts.to.lock.in.place..For.
size.48,.a.one-piece.bolted.hood.connects.directly.to.the.
fan.stack..To.lift.the.hood.off.the.unit,.remove.the.bolts.
located.under.the.mushroom.cap..For.sizes.54–72,.a.two-
piece.bolted.hood.connects.directly.to.the.fan.stack..To.
lift.the.hood.off.the.unit,.remove.the.sheet.metal.bolts.
than. connect. the. right. and. left. sides. of. the. hood. and.
then.remove.the.bolts.located.under.the.mushroom.cap..
See.Figure.9.below.