Trane QFNA-IOM-1 Fan User Manual


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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
16
19
19-5/16
21-25/32
17-25/32
20-7/16
21
24
24-5/8
28-1/32
23-1/8
26-5/16
27
30
30-7/8
34-5/16
29
32-3/16
33
36
37-23/32
41-11/16
35-13/32
29-5/32
40
44
45-31/32
50-13/16
43-5/32
47-11/16
49
54
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
16
19
20-5/32
22-5/32
25-7/8
27-7/8
21
24
26-5/32
28-5/32
22-7/8
25-7/8
27
30
32-5/32
34-5/32
28-7/8
31-7/8
33
36
38-5/32
42-5/32
38-5/32
42-5/32
40
44
46-5/32
48-5/32
46-5/32
48-5/32
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