Twin City Modular Plenum Fans - MPLFN / MPLFS / MPLQN / MPLQS - IM-495 - Manual (Page 3)

Twin City IM-495 3
Fan Installation – Factory Assembled Units
Follow.proper.handling.instructions.given.earlier.
1..Move.the.fan.to.the.final.mounting.position.
2..Remove.skid,.crates,.and.packing.materials.carefully.
3..If.supplied,.place.vibration.pads.or.isolation.base.on.
mounting.bolts..Line.up.holes.in.fan.base.with.bolts.
4..Place.fan.on.mounting.structure..Carefully.level.unit.
using. shims. as. required. at. all. mounting. hole. loca-
tions..Bolt.down.the.unit.
Assembly of Fans
1..Fans.must.be.securely.bolted.to.a.base.either.directly.
through.the.factory.mounting.holes.or.with.a.properly.
designed.clip..Final.bolting.of.each.individual.row.of.
fans.to.the.support.structure.or.base.should.be.done.
after.the.individual.fans.are.bolted.together.as.a.row.
. NOTE: A.thin.gasket.or.caulk.may.be.used.to.prevent.
undesired.air.leakage.and.noise.
2..The.bolts.to.be.snugged.up.on.vertical.sections.for.the.
first.row..Once.all.fasteners.are.in.place,.the.bolts.shall.
be.tightened.to.torque.values.in.table..See.Table.1.
3..The.bolts.holding.the.fan.to.the.supporting.structure.
can.now.be.torqued.
4..The.second.row.and.succeeding.rows.can.be.installed.
using.the.same.assembly.steps.as.the.first.row.
5..Sealing.around.the.perimeter.should.be.accomplished.
using.a.flexible.material.
Electrical Wiring of Fans
The. customer. is. required. to. investigate. and. install.
equipment. in. compliance. with. all. local. electrical. and.
safety.codes.for.the.equipment.location..Twin.City.Fan.&.
Blower.requires.all.power.cabling.be.located.away.from.
the. rotating. impeller. and. fastened. to. the. inside. of. the.
fan.housing..Wiring.must.be.routed.away.from.the.motor.
to.reduce.potential.contact.with.hot.or.greasy.surfaces.
When. a. fan. is. supplied. with. an. outlet. damper,. wiring.
the. electrical. supply. to. the. motor. requires. routing. the.
supply.through.the.damper.housing.frame..Knockouts.of.
various.sizes.are.provided.in.the.damper.housing.frame.to.
accommodate.cable.connectors.or.raceway.(see.figure.3).
Fan Operation - Safety
For. general. safety. practices. for. air. moving. equipment,.
see.AMCA.Catalog.410.
.
Twin. City. Fan. &. Blower. has. many. safety. accessories.
available.. These. safety. devices. include. (but. are. not.
limited.to).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. accessibil-
ity.and.location..How.easily.can.non-service.personnel.
access. the. unit?. Is. the. fan. in. a. hazardous. duty. envi-
ronment?. Was. the. unit. ordered. for. this. duty?. Other.
concerns. 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.
accidental.power.of.the.fan.while.service.is.in.process.
Figure 2.
Table 1. Torque Values MPLFN/MPLFS/MPLQN/MPLQS
Fasteners
Size Net Type
Torque Values
(ft lbs)
3/8.–.16.UNC Nylock 16.–.17
3/8-16 x 0.75 Screws & Nuts
front and back flanges
3/8-16 x 0.75 Screws & Nuts
axial flanges where accessable