3. Locateaninstallationsitethatwillmeettherequirementslisted in Step 3 of
the wall mounting instruction.
4. Firmlysecurefour lengths of 3/8”threadedrodto a firm structuralsupport.
Spacerodsto match patternmadebyholes in topofceilingmountbrackets.
5. Thread one nut onto each rod.
CAUTION: Thesizeand weightof the OM500 requires twopersons
or mechanicalmeans tolift andhold duringmounting.
6. Raise the unit up to threaded rods and insert rods through ceiling mount
brackets. Threadasecondnut onto each rod from below bracket.
7. Level unit by tightening the nuts against the ceiling mount bracket.
8. Thread a third nut onto each rod and tighten against the second nut to
preventlooseningof nuts due tovibration.
9. Connecttheunittothe oil mist source as explained in Step 6 of the wall
mountinginstructions.
OIL DRAINAGE
NOTE: Shouldcapturedoil be disposed of,makesure to follow local codes.
Provision for draining oil from unit is provided for by a 1” NPT pipe coupling on the
bottomoftheunit. Drainagecanbepipedtoacentralcollectionsystemorcollectedin
abucketplaced under the unit. In all cases a shut-off valve or drain trapisrequired to
preventairbypassthroughthe drain opening. One of thedrainsystemsshowninFig.
4 shouldbeused. Drainconnectionand lines are not provided.
NOTE: Shutoffvalve isinstalledin thedrainsystem,theunitmustbeemptied regularly
topreventoilfromoverflowingintotheintakeduct.
FIG. 3
ELECTRICAL CONNECTIONS
A. SINGLEPHASE 120VOLT
Becertainthat thesystemON/OFFswitchis intheOFFposition. Plug thepower
cordintothenearestoutletratedfor120volts.
B. THREE PHASE 208-230/460 VOLT
1. Conduit electrical connections should be made by a qualified electrician,
and must comply with local electrical codes.
CAUTION: Besurethat thedesignated circuit breakeris off untilall
wiringhasbeencompleted.
NOTE: Itis recommended that a 1 HPmotor starter/protector be used in
the supply circuit to this unit. See Wiring Diagram (FIG.6).
2. Remove the front motor compartment access cover.
3. Removetheelectricalwiringboxcover.
4. Makeelectricalconnectionsto the input wires as shown in Wiring Diagram
(FIG. 6)forthreephasewireconnections.
NOTE: The filter change indicator light circuit must be supplied with no
morethan270V. If a 460V,3-wiresourceis used, a transformerreplacement
kit(PartNo.30171-01)mustbeinstalledtoprovidepropervoltagetothe
indicatorlight.
5. Afterwireconnectionsarecompleted,affixconduittosideof unit via the 7/
8”diameterholethatisprovided.
6. Check blower for proper rotation direction. The blower should rotate
clockwisewhenviewedfrom the pulley end.Iftheblowerrotates backwards,
interchangetwoof the motor connectionwires.
PRE-OPERATION CHECKLIST
Beforeplacingunitinservice,checkthefollowingitems:
•Checkblowerdrivebelt for proper tension. (Belt should deflect approximately
1/2”whenfirmpressureisappliedmidway between the pulleys.)
•Checkthatmotor,blower,anddrivepulleys are mounted securely.
•Makesurethatbothcornersofeverypocketinthe filter bag are supported
bythefilter support rod and that the filter support rodsarefully engaged in
their support brackets.
•Airflowdirection arrows on theoilimpingermust point toward theblower.
•Checkthatairintakeandoildrainconnectionsareairoroiltight.
•Makesurethatallaccess panels, removed during installation,arereplaced,
and the filter access door is closed.
Unitisnowreadytobeplacedinservice.
AIR FLOW ADJUSTMENT
The OM 500 is equipped with variable diameter pulleys on the motor and blower to
allowtheairflow to be adjustedtotheinstallationrequirements. Thepulleys are set for
maximumairflowatthe factory. The air flow rate can be reduced as follows:
1. Removemotorcompartmentaccess cover. Be careful to avoid tearing gasket
material between the door and the cabinet.
2. Removebeltfrommotorpulley.
3. Loosenmotorpulleyadjustment set screw andscrewadjustableshiveout away
fromfixedshive. Each turn will reduce the air flow by approximately50CFM.
Tighten set screw onto flat (see FIG.5).
3
FIG.4
