Romlair V User manual

SHIPPING INSPECTION
Romlair Model V, VS, and VAfans are thoroughly
inspectedand testrun atthe factory.However,damage
mayoccur duringhandlingand shipping. Upon
receivingunit,check forany damageand reportit
immediately to the shipper. Also check to see that all
accessory items are accounted for.
INSTALLATION
LIFTING
When lifting the fans into place, attach an acceptable
chainorstrap tothe fourwindband mountingbrackets.
It is important not to lift the fan by the motor,
windband, or accessories.
Carefullymove thefan tothedesiredlocationand
fasten securely to the roof curb. Use fasteners to suit
construction and material. Fasteners are not supplied
byRomla VentilatorCompany.
ELECTRICALCONNECTIONS
The motor’s amperage and voltage rating must be
checked for compatibility to the supply voltage prior to
final electrical connection. Consult local and national
electrical codes regarding supply wiring requirements.
PRESTART-UPCHECKS
Checkallfastenersfortightness. Movementmay
occur during shipment and it is very important that all
fastenersaresecure, Thisis veryimportant onthe
bearingsand propellers. Manuallyrotate thepropeller
by hand to make sure it turns freely and does not
make contact with the fan housing.
1
9668-D Heinrich Hertz Drive, San Diego, CA 92154
PH: 619-946-1224
READ AND SAVE THESE INSTRUCTIONS
MODEL V, VS, & VA
UPBLASTPROPELLERROOF FANS
INSTALLATIONAND MAINTENANCE INSTRUCTIONS
Lifting Lug
Damper Lid
Directionof propellerrotationiscritical. Reversed
rotationwill resultinpoorairperformance, motor
overloadingand possibleburnout. Rotation should
correspondto therotationarrow locatedon thefan
propeller.
SERVICEACCESS
REMOVABLEWINDBAND FOR FANACCESS
Bysimplyremoving thebolts fromthe windband
mountingbrackets, thewindband canbe removed.
With the windband removed, access to the fan can be
gainedthrough thebutterfly dampers. Thisservice
feature applies to models VS,VA, & V.
Step 1:
Removethe 1/4-20bolts fromthewindband mounting
brackets, and then left up and placeto the side.
One person can do this on the smaller sizes, however,
on the larger sizes twomen may be required.
SeeFigure 1.
Figure 1

Goodfan maintenancerequires regularand systematic
inspection of all fan parts. Severity of the application
shoulddetermine frequencyof inspection.
FASTENERSAND SETSCREWS
Normalfan vibrationcan loosenfastens. Periodic
inspectionshouldinclude checkingall fastenersand
set screws. Check the propeller fasteners for tight-
ness.
2
CAREANDMAINTENANCE
Recommended Torque for Setscrews/Bolts (IN/LB.)
Step 2:
Withthewindband removedyou canaccessthe fan
components with the dampers in place or you can
choose to remove the dampers for full access. To
removethedampers, pullthe 2damper rodsoutas
shownin Figure2 andremove thedampers.
Step 3:
Withthedampers removedyou havefull accessto
thepropeller andother drivecomponents asshown
inFigure3
Step 4:
When fan maintenance is complete , reinstall the
damperhalves, andthewindband.
Figure 2
REMOVABLE WINDBANDFORFANACCESS(CONT’D)
SWERCSTES STLOBNWODDLOH
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.NIM.XAMEZIS HCNERW EUQROT
01.ON823361-"8/3042
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"61/562165
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"8/382257201-"4/30012
"61/78434839-"8/70402
"2/14050068-"10003
"8/5401100217-"8/1-10024
"4/3044100817-"4/1-10006
Figure 3
LUBRICATION-PILLOWBLOCK BEARINGS
Thebearings canbe operatedfor longtimeswithout
supplementof thegrease.See thefollowing Greasing
IntervalTable.
When lubrication is required, it is best to lubricate the
bearings while the fan is rotating. Do not unseat the
bearingseals byover lubricating.Excessive grease
can burst seals thus reducing the bearing life. Use no
morethan threeinjectionswith ahand operated
greasegun.
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Usefollowing tableas aguide forgreasing intreval.
*Normalbearingtemperature

LUBRICATION INSTRUCTIONSFORBALLBEARINGMOTORS
(WITH GREASE FITTINGS)
This is a ball bearing motor. The bearings have
been given initial lubrication at the factory, and
are adequate for a long period of operation
without relubrication.
Lubricationis intendedonly whenfittings areprovided.
Regreasingwill varydepending onmotor size,speed,
andenvironment.
PROCEDUREFORLUBRICATION
If motor is equipped withAlemite fitting, clean tip of
fitting and apply grease gun. Use 1 to 2 full strokes on
motors in NEMA215 frame and smaller. Use 2 to 3
strokes on larger motors.
CAUTION:
Keep grease clean!
LUBRICANT
Ahigh gradeball orroller bearinggrease shouldbe used.Recommended greasefor standardserviceconditions
is Polyrex EM (Exxon Mobil). Equivalent and compatible grease include:Texaco Polystar, Rykon Premium #2,
PennzoilPen 2Lube andChevronSRI.
RAEYREPECIVRESFOSRUOH LAVRETNIEBULERDETSEGGUS
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BELTSAND PULLEYS
Improperbelt tensionor misalignedpulleys frequently
causepremature beltfailures.TheV-belttension
should be at the lowest tension where the belts will not
slip at peak load. For proper tension, a deflection of
approximately1/4”perfootof centerdistance should
be obtained by firmly pressing the belt. Refer to
Figure3
Belt tension should be checked during the first 24
hoursof operationand re-adjustedif required. Loosen
or tighten the nuts on the threaded motor supports to
makethe requiredtensionadjustments.
Figure 3
3

Drivepulleys mustremain inproper alignmentafter
adjustments are made. Figure 4 illustrates correct and
incorrectpulley alignment.
Figure 4
BELTSANDPULLEYS(CONTINUED)
BEARINGREPLACEMENT(BELTDRIVEONLY)
1.Accessfrom underneathis preferable. Howeverif
this is not available, access to the fan from the roof
canbe doneby removingthewindbandanddamper
assembly.
2. Loosen the mounting bolts on the motor plate so
that the motor can be moved to lessen the tension on
the belts. Remove the belts.
3.Remove thepropellerfrom thefan shaft.This is
doneby remvingall threecapscrews fromthe propeller
and hub assembly. Start the capscrews into the
threadedholes inthe bushingflange.Tighteneachbolt
partofa turnsuccessively to forcethe propelleroffthe
taperedbushing. Pullthe bushingoffthe fanshaft.
4.Removethe bearinghold downbolts. This willallow
youto removehefan shaft,fan bearings,and the
drivensheave fromthe fanas oneassembly.
5. To aid the reassembly, measure and record the
locationof thebearingsand sheaveon thefan shaft.
7. Place the new bearings on the shaft loosely. Drop
mounting bolts in place, snug them and adjust the
positionofshaft.
8. Center both shaft ends in housing using the clear-
anceinthe mountingholes forhorizontal adjustment
andshimsif necessaryfor verticaladjustment.
9.Tightenthe bearingson thepropeller endfirst, then
tightenthe otherbearing.
10. Tap the locking collar lightly at the end away from
thepropeller.The shaftshould slidefreely endto end.
11. The final step is to align the shaft with the motor
sheaveandtighten thelocking collars.
12. If the fan is supplied with a lubrication line, attach
it to the grease connection.
13.Install thepropeller (Seeinstallation forpropellers
in this manuel) on the fan shaft and adjust bearing
position to center the propeller in the fan housing.
PROPELLERANDSHAFTREPLACEMENT CAUTION.
• If the fan shaft is dropped, it may get bent and cause
unbalancedoperation ofthefan.
• Place a support through the hub for lifting, making
surenot todamagethe finishedbore ofthe propeller.
• Do not allow the propeller to rest it’s entire weight on
thefan blades.
• Use caution if lifting the propeller by chain. Use
sufficientprotectiontopreventthe scoringof theshaft
orinjuryto thepropeller.
6. Install the pulley in the correct location on the shaft.
4

ManyRomlair beltdriven fansare furnishedwith
variable-pitchmotor sheaves. Onsome ofthese fans
sheavesmay beadjusted forlower fanspeeds without
concernof over-loadingmotors. When adjusting
sheavestoincrease fanspeed,check motorcurrentto
besuremotor isnot overloaded. Keepmotor current
withinnameplate andservice factorratings.
The sheaves used are the VL,VM, and the VPType.
Thesesheaves areeasilyadjusted andcome in
variousstyles dependingupon thesize driveand motor
shaft.
The following steps should be taken to adjust the
pitchdiameter:
1. Release the belt tension and remove belt or belts
fromthesheave.
ADJUSTINGVARIABLEPITCHSHEAVES
2. Loosen the set screw and remove key holding
adjustablehalf ofthegroove.
3. Screwadjustablehalf ofsheave outfora smaller
pitchdiameter (decreasedspeed),orinfor alarger
pitchdiameter (increasedspeed). Eachone-halfturn
will change the pitch diameter one tenth of an inch.
Adjusttwo-groove sheavesthe sameamount oneach
groove. 4LorAbelts will operate satisfactory with the
sheavefullyclosed toa maximumof fivefullturns
open. 5L or B belts will operate satisfactory with the
sheave one full turn open to a maximum of six full
turnsopen.
4. Replace the key and tighten set-screw to lock
sheave half in position.
5. Replace the belts and tighten to proper tension.
INSTALLATIONINSTRUCTIONS FORPROPELERSEQUIPPED
WITH BROWNING MALLEABLE IRON SPLIT TAPER BUSHING
Romlaircast aluminum andsteelfabricated propellers
arefurnished withsplittaper bushingsfor mountingthe
propellertothe shaft.When properlyassembled, the
bushings grip the hub with a positive clamping action.
A. Bushingbarrrel andbore ofpropeller aretapered-
this assures concentric mounting and a true running
propeller.
B. Capscrews, when tightened, lock bushing in
propeller.Use platedcap-screws threadedfull length.
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C. Bushing is split so that when the locking
capscrewsforcethe bushinginto thetapered bore,the
bushing grips the shaft with a positive clamping fit-this
willwithstand vibrationand punishingloads without
beingloosened.
D. Propeller and bushing assembly is keyed to shaft
and held in place by compression.
Put bushing loosely into propeller. Do not press or
drive. Start cap-screws by hand, turning them just
enoughto engagethreads intappedholes onpropeller.
Do not use a wrench at the time. The bushing should
belooseenough inthe propellerto moveslightly.
Be sure shaft and keyway are clean and smooth.
Check key size with both shaft and bushing.
Slidepropellerand bushingassembly ontothe shaft,
makingallowance forend playof shaftto prevent
rubbing. Donot forcepropellerandbushingonto shaft.
If it does not go on easily, check shaft, bushing and
key sizes.
Tightencapscrews progressivelywithwrench. Dothis
evenlyasin mountinganautomobile wheel. Take a
part turn on each capscrew successively until all are
tight. These capscrews force the taper bushing into
the hub which in turn compresses the bushing onto
the shaft. This makes a positive clamping fit. The
torque must not exceed that shown in table at left.
WARNING: Do not attempt to pull bushing flange flush
with hub end. There should be 1/8” to 1/4” clearance
when tightened.
5

9668-D Heinrich Hertz Drive, San Diego, CA 92154 PH: 619-946-1224
VENTILATIONPRODUCTS
TheRomla VentilatorCompanywarrants thisequipment tobe freefrom defectsinmaterialandworkmanship
undernormal useandserviceforaperiodof oneyear fromdate ofdelivery. Duringthe warrantyperiod ifany
partsprovetobedefective, theywill berepaired orreplacedfreeofcharge atfactory option: Ifupon receiptof
writtenauthorization theyaredeliveredprepaid tothe factory. This guaranteedoes notcover anydamage
causedbyneglect oflubrication, accidentoroverload, improperinstallation, nordoesit coverthe costofrepairs
madeorattempted outsidethefactory, without authorizationfrom RomlaCo. Electric motorsareguaranteed
onlytothe extentof the motormanufacturer’swarranty.
Romla Co., is not responsible for the cost of removal of the defective product or part, or the installation of the
repaired or replaced products or part. Correction of any verified defects by repair or replacement shall consti-
tute fulfillment of this warranty.
WARRANTY
6
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