Trane Q Fan User manual

Installation QFNA-IOM-1

ServiceLiterature

AirHandling

Fans

QFanandSuperQIIFan

Installation/Operation/Mainteance

QFNA-IOM-1

August1997

SV-AH-FAN-QFNA-IOM-1-897

FAN-IM-3-975

ModelQFanand

SuperQIIPlus™

X39640481-01

Subject Page

Model Number ............................3-7

General Information ..........................8

Literature Change History ......................8

About this Manual ..........................8

Warnings and Cautions .......................8

Shipping, Rigging and Handling ...................9

Storage ................................9

Installation - Q Fan

......................

Provide a Foundation ........................10

Isolate the Fan ...........................10

Arrangement 9: For units size 16-44, Class I and II ......10

Arrangement 9: For units size 49-60, Class I and II ......10

Arrangement 1: For units size 27-44, Class I and II .......10

Arrangements 1 and 9: For units size 16-44 Class III ......10

Clearances .............................10

Installation of Motor and Beltguard When NOT Factory Installed..12

Arrangement 9..........................12

Arrangement 1..........................12

Installation of Drives When Motor NOT Factory Installed......14

Arrangements 1 and 9......................14

Wheel Alignment ..........................15

Arrangements 1 and 9......................15

Q Fan Duct Connections ......................17

Super Q II Duct Connections ....................17

Installation - Super Q II ....................18

Preparation for Mounting ......................18

Ceiling Mounting ..........................18

Floor Mounting ...........................18

Accessories Installation .......................19

Inlet Vanes .............................19

Silencer ...............................19

Start-Up Q Fans and Super Q Fans .................20

Start-Up Procedures ........................20

Determining Fan RPM .......................20

Maintenance ..........................21

Establishing A Schedule ......................21

V-Belt Drive .............................21

Variable Inlet Vanes.........................21

Isolation Base ............................21

Wheel and Housing .........................21

Scheduled Preventive Maintenance Services ...........21

Bearing Service ............................25

About Bearings ...........................25

Sealmaster, SFT, MSF, SF and MSFT Bearings ..........25

Link-Belt P-300 Bearings ......................26

Link Belt Series 6800 Spherical Roller Bearing Pillow Blocks ...27

Troubleshooting............................29

Vibration and Noise .........................30

Other Noise and Vibration Services.................30

HP Too High

............................

Overheated Bearing

........................

High Temperatures

.........................

2 QFNA-IOM-1

Table of Contents

ModelNumberDescription

AnexampleofatypicalservicemodelnumberforaQFanisshownbelow.Thefanmodelnumberislocatedonthe

unitnameplate.Table1providesmodelinformationonbothQFansandSuperQIIFans.

ServiceModel

Number

QFCA4092HE0RE11NFFCAN000000000L

Table1

ModelNumberInformationforQFansandSuperQIIFans

QFNA-IOM-1 3

ModelNumber

Continuedonnextpage

ProductDescription

MODELQFNA TYPESQ2 SIZE40 ARRG9 CLAS2

UORTH DSEQE0 MTRSTT MTYPPO18 MSHP30

VOLT460 MOLOR GRSLN DTYPC1.5 WBALFACT

IOPTIB OOPTSH STPR2.5 FCFM30000 RPMF1421

BHPF22.4

4 QFNA-IOM-1

ModelNumber

Table1

ModelNumberInformationforQFansandSuperQIIFans (Continued)

Continuedonnextpage

QFNA-IOM-1 5

ModelNumber

SelectionCategory

Continuedonnextpage

Table1

ModelNumberInformationforQFansandSuperQII Fans(Continued)

6 QFNA-IOM-1

ModelNumber

Table1

ModelNumberInformationforQFansandSuperQIIFans(Continued)

None

Special

Continuedonnextpage

QFNA-IOM-1 7

ModelNumber

Table1

ModelNumberInformationforQFansandSuperQIIFans(Continued)

LiteratureChangeHistory

QFNA-IOM-1 (August 1997)

ManualsupersedesFAN-IM-3

(975),reflectingABUsupportof

theQfansandSuperQfans.

Generalupdate.

AboutthisManual

Thismanualdescribesproper

installationofModelQFansand

SuperQIIFans.

Note: Theinstallationand

servicingoftheequipment

referredtointhisbookletshould

bedoneonlybyqualified,

experiencedtechnicians.

ModelQfansareshipped

assembledexceptforsomemotor

anddriveselectionsthatarenot

mountedforshippingreasonsor

areintendedforfieldinstallationat

customerrequest.

Accessoriesaremountedtothe

fanatthefactorywiththefollowing

exceptions:

A. InletVaneOption(Shipped

frommfg.tojobsite)

B. SilencerOption(Shippedfrom

mfg.tojobsite)

C. FlexDuctOption(Shippedwith

fan)

D. VerticalMountingLeg

Option(Shippedwithfan)

E. IsolatorOption

(Shippedwithfanorfrommfg.)

Theseaccessorieshavetheirown

installationinstructionswhichare

shippedwiththeaccessory.

TraneModelQfansandSuperQ

IIFansaredynamicallybalanced,

properlyaligned,andlubricated

beforeleavingthefactory.These

Procedures,however,donot

guaranteethatthefanwillbe

readytooperateonreceipt.

Damageandmisalignmentcan

occurduetoroughhandling

duringshipmentandinstallation.

Followallinstructionsinthis

manualtoassureasuccessful

installation.Failuretofollow

theseinstructionsmayvoidthe

warranty.

THISMANUALSHOULDBE

KEPTWITHTHEFANUNIT

SINCEITCONTAINS

INFORMATIONFORPROPER

MAINTENANCEAND

TROUBLESHOOTING.

WarningsandCautions

NoticethatWARNINGSand

CAUTIONSappearsat

appropriateintervalsthroughout

thismanual.WARNINGSare

providedtoalertinstalling

contractorstopotentialhazards

thatcouldresultininjuryordeath,

whileCAUTIONSaredesignedto

alertpersonneltoconditionsthat

couldresultinequipmentdamage.

Yourpersonalsafetyandthe

properinstallationofthisunit

dependuponthestrictobservance

oftheseprecautions.

Observethefollowingwarnings,

cautionsandallwarninglabelson

theunit:

WARNING!

ROTATINGPARTS

DISCONNECTALLELECTRIC

POWERINCLUDINGREMOTE

DISCONNECTSBEFORE

SERVICING.SECUREDRIVE

SHEAVESTOENSUREROTOR

CANNOTFREEWHEEL.

Failuretodisconnectpower

beforeservicingcancause

severepersonalinjuryordeath.

Note: Re-connectallgrounding

devices.Allpartsofthisproduct

capableofconductingelectrical

currentaregrounded.Ifgrounding

wires,screws,straps,clips,nuts

orwashersusedtocompletea

pathtogroundareremovedfor

service,theymustbereturnedto

theiroriginalpositionandproperly

fastened.

8 QFNA-IOM-1

GeneralInformation

AllModelQandSuperQIIfans

areshippedonskidstominimize

possibledamageintransit.

Caution:

NEVERLIFTAUNITBYTHE

BEARINGBRACKETS,MOTOR

BRACKETS,OROTHER

ACCESSORIES.NEVER

FORKLIFTTHEUNITBYTHE

HOUSING.Failuretohandle

properlywilldamagetheunit.

Fansizes16-44canbelifted

usingtheliftingholesinthe

squareouterframe.Ifaforkliftis

used,liftonlyundertheskidsor

frame,beingespeciallycarefulfor

unitswithspecialprotective

coatings.

Fansizes49-60shouldberigged

forliftingandhandlingbysecuring

chainsorcablesthroughthefront

andrearmostmountingsupports

andunderthehorizontalstiffening

anglesasshowninFigure1.

Storage

Thefollowingcriteriashouldbe

metwhenstoringtheunit.

Note: Protecttheunitfromthe

elements.

Whereoutsidestorageis

necessary,severalprecautions

areneeded.

• Firstcovertheinletbearingand

driveopening,thenplaceunitin

anareawithgooddrainageand

coverwithatarpifpossible.

• Donotuseplastictocompletely

covertheunitattheriskof

trappingcondensation.This

typeofcoveringcancause

excessmoisture,condensation

andrusting.

• DONOTSTACKFANS.

FANSIZES49-60THATSHIP

WITHANINLETBELLMUST

REMAINONTHESHIPPING

SKIDUNTILREADYTOBE

INSTALLEDONISOLATORS.

Theinletbellextendsbelowthe

bottomframeofthefanandcan

bedamagedifsetonthefloor

withoutskids.

Forextendedstorageorstorage

undersevereconditions:

• Asoftenasonceamonth,

purgethebearingswithfresh

greasetopreventmoistureor

dirtfromaccumulatinginthe

bearing.

• SeeMaintenanceSectionof

thismanual.

QFNA-IOM-1 9

Shipping,RiggingandHandling

Figure1—TypicalFanUnitShippedwithRigging

(Sizes49-60)

ProvideaFoundation

Mostunitswillbemountedtoor

hungfromaconcretestructure.If

mountedtoasteelstructure,the

mountingstructureshouldbe

welded.Table2referstounit

weights.

IsolatetheFan

Isolationshouldbeusedto

preventnoiseandvibrationfrom

beingtransmittedtothebuilding.

Arrangement9: Forunitssize

16-44,ClassIandII

Mountdirectlytofourflexible

isolatorsforeitherfloororceiling

mounting.Userailsforwall

mounting.Forvertically-mounted

fans,providemountinglegsto

whichisolatorsaremounted.

Arrangement9: Forunitssize

49-60,ClassIandII

Mountdirectlytoeightisolators

whenusedwithasteelor

concretebase.Eightboltsare

usedtomountthefantothebase

inholespre-drilled.Thesesizes

mustbemountedhorizontally.

Whenceilingsuspensionis

required,thefanmustbeseton

anintegralbasewhichishung

fromtheceiling.

Arrangement1: Forunitssize

27-44,ClassIandII

Useanintegralsteelorconcrete

baseratherthanindividual

isolators.Mountthefan

horizontallyasshowninFigure2.

Arrangements1and9:For

unitssize16-44,ClassIll

Providearigidintegralsteelbase

or,preferably,aninertiapad.

Mountthesefanshorizontally.

Note: Forsomeapplications

involvinglargefansandhigh

pressures,thrustrestraintsmay

berequired.Whenused,mount

themonthefansexteriorframe

membersatthehorizontal

centerline.

Clearances

Allowsufficientclearancearound

theequipmenttoprovideample

roomforservicingand

maintenance.Inletscreenmaybe

usedifthefanhasanunducted

inlet.Recommendedminimum

clearanceisnolessthan1/2the

fanwheeldiameterawayfroma

wallorobstruction.

Installation—QFan

10 QFNA-IOM-1

Installation—QFan

QFNA-IOM-1 11

Table2-UnitWeight(LessMotor,Drive,AccessoriesandShippingPackage)

UnitSize

Note: *NA-Thiscombinationofarrangement,classandsizeisnotavailable.

Figure2—IntegralBaseforArrangement1

TopView

Caution:

Whenthecustomerisproviding

drivesand/ormotor,theTrane

Companywillnotassumeany

responsibilityfordamages

occurringduetoselected

drivesormotors.

InstallationofMotorand

BeltguardWhenNOT

FactoryInstalled

Arrangement9

1. Removethebeltguardfrom

theshippingposition.Remove

thescrewsontwosidesalong

theedge(thenumbervaries

withthefansize).Lifttheguard

off.

2. Ifneeded,repositionthebelt

tightenertocorrespondtothe

specificbeltlengthandmotor

frame(drivecenterline).(See

Figure3).

3. Tomountthemotor,firstturn

theadjustingscrewsforthe

belttightener(anglesorbase

plate)downasfaraspossible.

4. Boltthemotortothebelt

tightener.Beforefinal

tightening,centerthemotoron

thebelttightener.

5. Checkthemotorrotationtobe

surethefanwillrotateinthe

directionshowninFigure4

whenthedriveisinstalled.

6. Disassemblethebeltguardby

removingtheclipsorscrews

thatholdthefrontandrear

panelstogether.SeeFigure5.

Sliptherearpanelassemblyof

thebeltguardovertheshaftso

thattheshaftprotrudes

throughtherubberblock-offto

beltguard.Onfanssizes

49-60,securetherubber

block-offbyputtingacrimpin

theslotsholdingblock-offto

beltguard.SeeFigure6.

Locatetheedgeoftherear

panelassemblyongasketing

approximately1/4"fromthe

drivehole.RefertoFigure7.

Centertherearpaneloverthe

driveholeintheshelland

securewiththeself-drilling

screwsprovidedasshownin

Figure8.

Arrangement1

Removethemotorpedestal

supportandbeltguardfromthe

topoftheunitandboltthe“F”

shapedpedestalsupporttothe

unitasillustratedinFigure2.

Mountsliderailbasetopedestal.

Boltthemotortothesliderail

base.Disassemblethebeltguard

byremovingtheself-tapping

screws.Sliptherearside

assemblyofthebeltguardover

themotorshaftsothattheshaft

protrudesthroughtherubber

block-off.SeeFigure6.Locatethe

edgeoftherearsideassemblyof

thebeltguardongasketing

approximately1/4"fromtheedge

ofthedriveholeinthefanshell.

Themotorshouldbeascloseto

thefanshaftcenterlineasthe

sliderailbasewillpermit.

Fastenthefrontsideassemblyof

thebeltguardtotherearside

assemblyalreadyinplaceonthe

unitwiththeself-tappingscrews

provided.Thepolyurethane

gasketmustremaininposition

duringthisoperation.Drillpilot

holesintheshellusingthefront

sideassemblyasatemplateand

attachtotheshellwithscrews

provedinFigure8.Attachsupport

legandanglewithscrews

provided.

Installation—QFan

12 QFNA-IOM-1

Installation—QFan

QFNA-IOM-1 13

Figure3—ShowsMotorMount

AngleAdjustment

Figure4—MotorRotationInletEnd

Figure5—BeltGuard

Disassembled

Figure6—MotorandSheave

Arrangement

Figure7—RearSideAssemblyof

BeltGuard

Figure8—FanDischarge

Airflow

InletSideView

InstallationofMotorand

BeltguardWhenNOT

FactoryInstalled

Arrangements1and9

Removethedischargecone

coveringthefanshaft.Checkthe

sheaveboreforburrsand

lubricateforeasiermounting.Do

notuseexcessiveforcewhen

mountingsheaves,asthismay

damagethebearings.Besurethe

fanandmotorshaftsareparallel.

SeeFigure9.

Setthemotorsheavewitha1/2"

spacebetweenblock-offretainer

andbackofsheaveasshownin

Figure6.Alignthesheaveswitha

straightedgeasinFigure9and

tightenthesetscrews.Whenthe

sheavesarenotthesamewidth,

placeastringinthecentergroove

ofbothsheavesandpulltight.The

stringshouldgostraightthrough

thecenterofbothgrooves.

Movethemotorinasclosetothe

fanshaftcenterlineasthe

adjustingangleswillpermit.

Slipthebeltsoverthesheaves

withoutforcingthem.Forcingthe

beltsmaycausedamage.

Tightenthebeltsslightlyand

manuallyrotatethedriveseveral

times.Asacheck,onmultiplebelt

drives,determinethattheforceof

deflectionisapproximatelythe

samebypushingeachbeltinan

equaldistanceatapointhalfway

betweenthesheaves.

Afterrealignment,tightenthebelts

toareasonabletension.Operate

theunitafewminutestoallow

beltstoseat(SeeStart-Up).Belts

shouldnotslipwhenrunning,but

aslightsquealatstartupis

normal. Donotover-tensionbelts.

Belttensionshouldberechecked

aftereighthoursofoperationand

monthlythereafter.Whenthebelt

isinoperation,thetightsideofthe

beltshouldformastraightline

fromsheavetosheavewithonlya

slightbowontheslackside.

Attachthefrontsideofthebelt

guardtotherearpanelassembly

alreadyinplaceontheunitusing

clipsorscrewsprovided.Keepthe

polyurethanegasketinposition

duringthisoperation.

Replacetheendconeusingthe

screwsand/orclipsoriginally

used.Besurebeltsdonotscrape

theedgeofthecutoutintheend

conewhentheunitisinoperation

Installation—QFan

14 FNA-IOM-1

Figure9—AligningSheavesWithAStraightEdge

ForSheavesOfTheSame

WheelAlignment

Arrangements1and9

Manuallyrotatethefanwheeltobe

surethatitturnsfreely.Thetip

clearancesaresetinthefactoryand

normallydonotrequirereadjustment.

todetermineifadjustmentis

required,measureandrecordthe

clearancesbetweenwheeland

housingatsixequallyspaced

intervalsaroundtheinsideofthefan

housing.Clearancesshouldbe

measuredattheleadingandlagging

edgeofthebladetip.Ifadjustmentis

necessaryloosenthefrontbearing

boltsandreadjustbearinglocation.

SeeFigure10.Onsizes16through

44,additionaladjustmentcanbe

obtainedbylooseningfrombearing

bracketandreadjustingposition.

Retightenallfastenersandtorque

perTables4and5.

TipclearancesaregiveninTable3

andbolttorquesinTable4and5.

Checkthespacingbetweentherear

edgeofthefanwheelanddiffuser

cylinder.Ifthisspacingisnotas

showninFigure11,movethefan

wheelontheshaftforproper

measurement.Toachievethis,

loosenthesetscrew(s)andmovethe

fanwheeloutsufficientlytoinserttwo

piecesofthecorrectthicknessbar

stock,oneateachsideofthewheel.

Movewheelgentlyagainstbarstock

pieces.Tightensetscrewandremove

barstockpieces.SeeFigure11.

Installation—QFan

QFNA-IOM-1 15

Figure11—ClearanceFanWheelDiffuser

Figure10—FrontBearingBracket

Installation—QFan

16 FNA-IOM-1

Unit

Size

TipClearance

(Inches)

.030to.075

.035to.080

.040to.085

.045to.090

.050to.095

.055to.100

.065to.110

Table3—TipClearanceBetween

WheelandHousingClass1,2

and3

BoltDia.

(Inches)

TorqueFt/Lb

1/4 6

5/16 12

3/8 24

7/16 52

1/2 69

9/16 99

5/8 150

Table4—RecommendedTorquesfor

WheelBolts(WheelBoltsareonFanSizes

(49-60Only)

BoltDia.

(Inches)

TorqueFt/Lb

1/4 6

5/16 12

3/8 20

7/16 43

1/2 58

9/16 76

5/8 115

3/4 195

Table5—NutandBoltTorque

RequirementsforFanHousing

andBearingSupports

QFanDuctConnections

Tomaintaincatalogperformance

theremustbeaminimumofthree

fandiametersofstraightductonthe

faninletandminimumofonefan

diameterofstraightductonthefan

discharge.A90°elbowatthe

dischargeshouldbeaminimumof

twofandiametersfromthefan

discharge.Anopenfaninletshould

neverbecloserthanonefan

diameterfromabulkhead.Usean

inletBELLforopeninletapplications

tomaintainratedperformance.

Inletductsshouldbethesame

diameterasthefaninlet.Outletducts

maybethesamediameterasthefan

outletorinlet.Iftheoutletductis

equaltotheinlet,eithertheduct

equalizeraccessoryorflexible

connectionshouldbeusedtomake

thetransition.Theinletandoutletare

thesamesizeonfansizes49-60".

SeeTables6and7forinletand

outletdiameters.

Flexibleconnectionsare

recommendedforquietoperationan

andarerequiredforunitsmounted

onvibrationisolators.Flexible

connectionsshouldbefastenedto

theinletoroutletsothattheydonot

extendintoeitheropening.Flexible

connectionsshouldnotbestretched

tight.Iftheconnectionstendtosag

oraremisalignedattheinlet,a

sectionofductwhoselengthisequal

toone-halfthewheeldiameter

shouldbeattachedtothefaninlet

aheadoftheflexibleconnection.

Inahorizontalruninwhichan

Arrangement9fanisboltedtoa

floor,wall,orsuspendedfroma

ceiling,ductworkmaybeflangeor

slipconnectedaslongasthereisno

distortionofthefanshellduetothe

ductweight.Thesameapplies to

Arrangement1fanswhichare

alwaysfloormounted.

Note:Flangedconnectionsrequire

inletoroutletflangeaccessory.

Accessdoorsshouldbeprovidedin

theinletandoutletductsifthe

flexibleconnectionsdonotpermit

sufficientaccesstothefan.The

accessdoorsshouldbelarge

enoughtomakepossiblevisual

inspectionofthebearingatthefan

inletandremovaloftheendcone

accesstothedriveandrearbearing.

SuperQ11Duct

Connections

Connectinletandoutletductworkto !

SuperQ11ductcollars.DONOT

SUPPORTEXTERNALDUCT

FROMTHEDUCTCOLLARS.

Externalductworkshouldbe

supportedindependentlyfromthe

floortotheceiling.

Tomaintaincatalogperformance,

theremustbeaminimumofthree

diametersofstraightductontheinlet

andminimumofonediameterof

straightductonthedischarge.A90°

elbowatthedischargeshouldbea

minimumoffandiametersfromthe

fandischarge.Anopenfaninlet

shouldneverbecloserthanonefan

diameterfromabulkhead.Usean

inletBELLforopeninletapplications

tomaintainratedperformancefor

sizes49through60only.

Installation—QFan

QFNA-IOM-1 17

Table6-InletandOutlet

DiametersforQFan

Unit

Size

Inlet Outlet

19-5/16

21-25/32

17-25/32

20-7/16

24-5/8

28-1/32

23-1/8

26-5/16

30-7/8

34-5/16

32-3/16

37-23/32

41-11/16

35-13/32

29-5/32

45-31/32

50-13/16

43-5/32

47-11/16

52-3/8

58-1/32

52-3/8

58-1/32

60 64-1/16 64-1/16

Table7-InletandOutlet

DiametersforSuperQIIFan

Unit

Size

Inlet Outlet

20-5/32

22-5/32

25-7/8

27-7/8

26-5/32

28-5/32

22-7/8

25-7/8

32-5/32

34-5/32

28-7/8

31-7/8

38-5/32

42-5/32

38-5/32

42-5/32

46-5/32

48-5/32

46-5/32

48-5/32

PreparationforMounting

Lifttheunitintopositionwitha

craneorforklift.Craneliftfromthe

endsofthesupportrailsusinga

spreaderbar.Whenusingafork,

liftfromunderbothsupportrails.

Ceiling Mounting

Hangceilingsupportedunitswith

four3/4-inchsteelrods,one

connectedtoeachcornerofthe

supportrail.Uselargeheavy

gaugewasherstoinsuretheunit

remainsattachedtotherods.

FloorMounting

Beforeunitstartup,always

removetheshippinghold-down

screwsfromthebottomoftheunit

tofreetheisolators.Thereisone

screwateachendofthehat

section.Usetheplugbuttons

(providedinthebagattachedto

theunit)tocovertheholes.

18 QFNA-IOM-1

Installation—SuperQII

Figure11a—InletVaneInstallation

InletVanes

Caution:

Due to the size of the equipment,

reasonable care must be taken

when loading, unloading,

handling and installing the inlet

vane assembly to avoid over

stressing and possible permanent

damage to the frame and related

components by excessive racing,

skewing, twisting etc.

1. Bracketangles,isolators,and

fastenersarecommon

procurementitemstobe

suppliedbythecustomer.See

Figure11a.

2. Usinganinletvaneanglering

asatemplatedrilleight(8)

holesofC(two(2)per

quadrantinQFanframe.

AssemblewithsizeDbolts,

nutsandlockwashers.

3. Positionsupportbracketunder

inletvaneassemblyasshown.

Usebrackettodrillsix(6)

holesinangleringonflow

enteringside.Usesamedrill

andfastenersizeasabove.

4. Weldorfastencornersofthe

brackettogetherandattach

isolator(s).

5. Usetwoisolatorsforsize49

through60only.Size16

through44usesoneisolator

mountedinthecenter.

Silencer—

QFanandSuperQIIFan

PlusDuctSilencers,when

ordered,areshippedloosefrom

themanufacturerandarefield

installed.

TheymustbeconnectedtotheQ

fanusingtheflexibleduct

connectorbuttheycanbeeither

rigidorflexconnectedtothe

SuperQfans.Silencersaresized

forQFanandSuperQFan

collars.Thesupportstructurefor

silencersandflexconnectorsare

providedbytheinstaller.

Inletsilencer— hasafixedcenter

bodyandshouldbeattachedas

perabovedescription.Theairflow

arrowonthesilencershouldfollow

thedirectionoftheairflow

indicatedontheQFan.

Outletsilencer— hasamovable

cylinder.Theinnercylinderhas

eithersheetmetalscrewsoris

spotwelded.Removethesheet

metalscrewsfromthesilencer

centerbodyorbreakthespot

weldswithachiselandhammer.

Thecenterbodymustthenbe

repositionedclosetotheendcap

ofthefan(nomorethanoneinch

fromtheendcap).Securethe

silencercenterbodywithsheet

metalscrewsandconnectwiththe

fanusingconnectorsasperabove

description.

Theairflowarrowonthesilencer

shouldfollowthedirectionofthe

airflowindicatedontheQFan.

QFNA-IOM-1 19

AccessoriesInstallation

Figure11b—TypicalSilencer

Start-UpProcedures

Thefollowingitemsmustbe

checkedbeforeinitialstart-upof

thefan:

1. Checkallbolts,setscrews,and

lockingcollarsonthefan,

bearings,drive,motormount,and

accessoriesfortightness.See

Tables4,5,10,11and13.

2. Turnthefanwheelbyhandtobe

sureitdoesnotstrikeanyportion

ofthehousing.SeeTable3fortip

clearancefortipclearance.

3. Recheckbearingalignmentand

lubrication.

4. Operatethevariableinletvanes

tobesuretheymovefreelyand

positionproperly.

5. Repairanycoatingflawsinunits

withspecialprotectivecoatings.

6. Checkswitchesandwiringto

motor.

7. Checkfanandductfordirtand

debrisandcloseallaccessdoors.

Foreignmaterialintheinletcone

cancausewheelimbalance.

8. Checkbeltalignmentandtension

asfollows:

• Tightenthebeltsslightlyand

manuallyrotatethedriveseveral

times.

• Onmultiplebeltdrives,determine

thattheforceofdeflectionis

approximatelythesameby

pushingeachbeltinanequal

distanceatapointhalfwayfrom

eachsheave.Ifthisforceisnot

thesameforeachbelt,themotor

andfanshaftarenotparallel.

Realignasrequired.

• Afterrealignment,tightenthebelts

againtoareasonabletension.

• Operatetheunitafewminutesto

allowbeltstoseat.Beltsshould

notslipwhenrunning,butaslight

squealatstart-upisnormal.DO

NOTOVER-TENSIONBELTS.

• Belttensionshouldberechecked

after8hoursofoperationand

monthlythereafter.Whenthebelt

isinoperation,thetightsideof

thebeltshouldformastraightline

fromsheavewithonlyaslightbow

ontheslackside.

Atinitialstart-up,checkthefanwheel

forproperrotation.Whenfacingthe

inlet,thewheelmustrotate

clockwise.

Ifthefanhasinletvanes,theycanbe

partiallyclosedtolowerpower

requirementsatstart-up.Onfans

withmulti-speedmotors,runinitial

checkoutatlowspeed.

Payparticularattentiontoany

vibration,noiseoroverheatingofthe

fanbearingsandmotor(bearings

mayrunwarmduringbreakin).

Vibrationisthemostcommon

problemencounteredduringstart-up.

Ifthevibrationissignificant,itmust

becorrectedbeforeallowingthefan

tooperatecontinuously.SeeTable8.

The“TroubleShooting”sectionof

thismanualdetailsthecommon

causesforvibration.Iftheproblemis

diagnosedasfanwheelimbalance,

useavibrationanalyzertorebalance

thefan.Theadditionofanybalance

weightscanbemadeontheinlet

cone.SeeFigure11.

DeterminingFanRPM

QFansandSuperIIFanswith

factoryinstalledmotoranddriveare

shippedwiththecorrectFanRPM.

However,ifthemotoranddriveare

fieldinstalledandtheFanRPM

needstobesetorchecked,the

followingprocedurecanbeused:

FanRPMcanbestbedeterminedby

usingastrobe-typetachometer.If

suchaninstrumentisnotavailable,

approximateRPMcanbederivedas

follows:

1. Removebeltguardandmark

motorsheave.

2. Byhand,rotatethefanwheel10

timeswhilecountingrevolutions

ofmotorsheavetothenearest

quarterturn.

3. DividethenameplatemotorRPM

bythenumberofrevolutionsof

themotorsheaveandmultiplyby

10.ThisisFanRPM.

Example: Ifmotorsheaverevolves

8-1/4turns--Motornameplate

states1750RPM.

20 QFNA-IOM-1

Start-UpQFansandSuperQII

Table8-MaximumAllowableVibrationonTraneModelQFans

FanSize FanRPM Vert,Horiz,andAxial

Fans

16-44 AllSpeeds 5Mils

49-60 Upto1000 4Mils

49-60 1000&Up 3Mils

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Trane Q Fan, QFNA-IOM-1, Super Q II Plus User manual

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