Accurex XRUBS Owner’s Manual

Document 470311

Model XRUBS

Steel Grease Fan

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.

Steel Grease Fan

These belt drive upblast centrifugal exhaust fans are specifically
designed for high grease applications.

The maximum continuous operating temperature is 400°F (204.4°C).
Fan is available in nine sizes, 140-200 HP with nominal wheel diameter
ranging from 14 to 20inches (356 to 508 mm). Each fan shall bear
a permanently affixed manufacturer’s embossed metal nameplate
containing the model number and individual serial number.

General Safety Information

Only qualified personnel should install this fan.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity is present. If more information is needed,
contact a licensed professional engineer before moving
forward.

1. Follow all local electrical and safety codes, as well as
the National Electrical Code (NEC) and the National
Fire Protection Agency (NFPA), where applicable.
Follow the Canadian Electric Code (CEC) in Canada.

2. The rotation of the wheel is critical. It must be free
to rotate without striking or rubbing any stationary
objects.

3. Motor must be securely and adequately grounded.

4. Do not spin fan wheel faster than max cataloged fan
RPM. Adjustments to fan speed significantly affects
motor load. If the fan RPM is changed, the motor
current should be checked to make sure it is not
exceeding the motor nameplate amps.

5. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces or chemicals.
Replace cord immediately if damaged.

6. Verify that the power source is compatible with the
equipment.

7. Never open access doors to a duct while the fan is
running.

DANGER

Always disconnect, lock and tag power source before
installing or servicing. Failure to disconnect power
source can result in fire, shock or serious injury.

CAUTION

When servicing the fan, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.

CAUTION

Precaution should be taken in explosive atmospheres.

DANGER

Pour écarter les risques d’incendie, de choc électrique
ou de blessure grave, veiller à toujours débrancher,
verrouiller et étiqueter la source de courant avant
l’installation ou l’entretien.

ATTENTION

Lors de toute intervention sur la soufflante, le moteur
peut être suffisamment chaud pour provoquer une
douleur voire une blessure. Laisser le moteur refroidir
avant toute maintenance.

ATTENTION

Faire preuve de précaution dans les atmosphères
explosives.

Steel Grease Fan 1

Table of Contents

General Safety Information ...................... 1

Receiving, Unpacking, Handling, Storage,

Inspection and Maintenance During Storage,

Removing from Storage ......................2-3

Dimensional Data ............................. 3

Installation

Typical Roof Mounting ........................4

Commercial Kitchen .......................... 5

Grease Trap ............................... 5

Pre-Starting Checks ........................... 6

Operation .................................... 7

Inspection ...................................7

Maintenance .................................8

Belt and Bearing Maintenance ..................8-9

Recommended Bearing Lubrication .............. 9

Fan Inlet Conditions ........................... 9

Troubleshooting .............................. 10

Parts List ................................... 11

Our Commitment .......................Backcover

Figure 1

Screw

Figure 2

Hook with Safety Latch
(Supplied by others)

(2) Bearing Plate
Lifting Points

(4) Drive Frame Lifting Points

Screw

Receiving

Upon receiving the product, check to ensure all
items are accounted for by referencing the delivery
receipt or packing list. Inspect each crate or carton
for shipping damage before accepting delivery. Alert
the carrier of any damage detected. The customer will
make notation of damage (or shortage of items) on
the delivery receipt and all copies of the bill of lading
which is countersigned by the delivering carrier. If
damaged, immediately contact your representative. Any
physical damage to the unit after acceptance is not the
responsibility of the manufacturer.

Unpacking

Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative to
arrange for obtaining missing parts. Sometimes it is not
possible that all items for the unit be shipped together
due to availability of transportation and truck space.
Confirmation of shipment(s) must be limited to only
items on the bill of lading.

Handling

When lifting the unit onto the roof, use either the four
lifting points on the drive frame or the two lifting points
on the bearing plate if present, see Figure1 for lifting
points. Access to the drive frame is accomplished by
removing the screws pointed out in Figure 2. The cover
can then be removed and placed on a flat surface in an
area protected from strong winds.

When the unit is on the roof, move fan to desired
location using lifting points and fasten securely
according to mounting details outlined in the Installation
section pertaining to your application. Shims may be
necessary depending upon roofing material thickness.

IMPORTANT

Do not lift by the fan hood. Avoid lifting fans in a way
that will bend or distort fan parts. Never pass slings or
timbers through the venturi of fan. Fans with special
coatings or paints must be protected in handling to
prevent damage.

The motor amperage and voltage ratings must be
checked for compatibility to supply voltage prior to
final electrical connection. Wiring must conform to local
and national codes. Consult local code authorities for
specific requirements.

Storage

Fans are protected against damage during shipment. If
the unit cannot be installed and operated immediately,
precautions need to be taken to prevent deterioration of
the unit during storage. The user assumes responsibility
of the fan and accessories while in storage. The
manufacturer will not be responsible for damage during
storage. These suggestions are provided solely as a
convenience to the user.

Indoor - The ideal environment for the storage of

fans and accessories is indoors, above grade, in a
low humidity atmosphere which is sealed to prevent
the entry of blowing dust, rain or snow. Temperatures
should be evenly maintained between 30° to 110°F

(-1° to 43°C)

condensation and “sweating” of metal parts). All
accessories must be stored indoors in a clean, dry
atmosphere.

Remove any accumulations of dirt, water, ice, or snow
and wipe dry before moving to indoor storage. To avoid
“sweating” of metal parts, allow cold parts to reach
room temperature. To dry parts and packages, use
a portable electric heater to get rid of any moisture
buildup. Leave coverings loose to permit air circulation
and to allow for periodic inspection.

(wide temperature swings may cause

Steel Grease Fan2

The unit should be stored at least 3½ inches (89 mm)
off the floor on wooden blocks covered with moisture
proof paper or polyethylene sheathing. Aisles between
parts and along all walls should be provided to permit
air circulation and space for inspection.

Outdoor - Fans designed for outdoor applications

may be stored outdoors, if absolutely necessary.
Roads or aisles for portable cranes and hauling
equipment are needed.

The fan should be placed on a level surface to prevent
water from leaking into the fan. The fan should be
elevated on an adequate number of wooden blocks so
that it is above water and snow levels and has enough
blocking to prevent it from settling into soft ground.

Locate parts far enough apart to permit air circulation,
sunlight and space for periodic inspection. To minimize
water accumulation, place all fan parts on blocking
supports so that rain water will run off.

Do not cover parts with plastic film or tarps as these
cause condensation of moisture from the air passing
through heating and cooling cycles.

Fan wheels should be blocked to prevent spinning
caused by strong winds.

Inspection and Maintenance During
Storage

While in storage, inspect fans once per month. Keep a
record of inspection and maintenance performed.

If moisture or dirt accumulations are found on parts,
the source should be located and eliminated. At each
inspection, rotate the wheel by hand ten to fifteen
revolutions to distribute lubricant in motor. If paint
deterioration begins, consideration should be given to
touch-up or repainting. Fans with special coatings may
require special techniques for touch-up or repair.

Machined parts coated with rust preventive should be
restored to good condition promptly if signs of rust
occur. Immediately remove the original rust preventive
coating with petroleum solvent and clean with lint-free
cloths. Polish any remaining rust from surface with
crocus cloth or fine emery paper and oil. Do not destroy
the continuity of the surfaces. Thoroughly wipe clean
with Tectyl

®

506 (Ashland Inc.) or the equivalent. For
hard to reach internal surfaces or for occasional use,
consider using Tectyl

®

511M Rust Preventive, WD-40®

or the equivalent.

Removing From Storage

As fans are removed from storage to be installed in their
final location, they should be protected and maintained
in a similar fashion until the fan equipment goes into
operation.

Dimensional Data

B

C*

D

1¾ in. (44 mm)

A

Fan Size A B *C D

140, 140HP

160, 160HP,
160XP

180, 180HP

200, 200HP

• All dimensions are in inches (millimeters).

• Dimension “A” is the inside dimension of the curb cap. The roof
curb should be 1½ in. (38 mm) less than the curb cap to allow for
roofing and flashing.

* Dimension “C” may vary depending on motor size.

^ Approximate weight shown in pounds (kilograms) is the largest

cataloged open drip proof motor.

• Roof opening is a square dimension.

26

(660)

30

(762)

287⁄8

(733)

353⁄8

(899)

293⁄4

193⁄8

(756)

(492)

285⁄8

(727)21(553)

Roof

Opening

181⁄2

(470)

201⁄2

(521)

^Approx.

Weight

125

(57)

131

(59)

190

(86)

213

(97)

Steel Grease Fan 3

Installation

Typical Roof Mounting Installation

IMPORTANT

Installation, troubleshooting and parts replacement
are to be performed only by qualified personnel.
Consult and follow all applicable national, state and
local codes as they will supercede this document.

1. On the roof surface, cut an appropriate sized hole
and follow manufacturer’s instructions on curb
installation. Caulk and flash the curb to ensure a
water tight seal.

2. Remove motor cover. Access to the motor
compartment is accomplished by removing the
screws as shown on page 2, Figure 2.

3. Use the lifting lugs on the drive frame to lift and
place the unit on top of roof curb. Refer to page 2,
Figure1.

4. Secure fan to curb using a minimum of suitable
fasteners. Shims may be required depending upon
curb installation and roofing material.

5. Verify power line wiring is de-energized before
connecting fan motor to power source.

6. For commercial kitchen applications, the electrical
supply must enter the motor compartment through
the breather tube. For other non-flammable
applications, the electrical supply should also be
routed through the breather tube.

7. Connect power supply wiring to the motor as
indicated on the motor nameplate or terminal box
cover. Check the power source for compatibility
with the requirements of your equipment.

8. Check fan wheel for free rotation, recenter if
necessary. Check set screw(s) for tightness.

9. Check all fasteners for tightness.

10. Mount and wire safety disconnect switch under
motor cover. Wire control switches at ground level,
refer to Figure 3.

11. Replace motor cover.

MOTOR

J-BOX

SUPPLY VOLTAGE
115/208-230/60/1

L1
L2

MOTOR

J-BOX

SUPPLY VOLTAGE

208-230/460/60/3

L1

L2

L3

12. A drain trough is provided on all fans for single­point drainage of water and residue. Some means
for collection of this residue must be provided,
either a container directly under the trough or use
of an adapter and pipe to carry the residue to a
remote collection point. An optional grease trap
with water separator baffle is available from your
representative.

13. A clean-out port and hinged base are also provided
on all units. They aid the cleaning process through
additional access to the wheel. The fan is designed
for the worst cooking conditions, such as char
broilers, solid fuel cooking or oriental cooking.

Table 1 shows the suggested exhaust system

inspection schedule published in NFPA 96.

Table 1: Exhaust System Inspection Schedule

Type or Volume of Cooking

Systems serving solid fuel cooking
operations

Systems serving high-volume cooking
operations, such as 24 hour cooking,
char broiling, or wok cooking

Systems serving moderate-volume
cooking operations

Systems serving low-volume cooking
operations, such as churches, day camps,
seasonal business, or senior centers

Frequency

Check

Monthly

Quarterly

Semiannually

Annually

14. Clean-Out Port:
Position the
clean-out port so
it is on the side of
unit when hinged
open, see Figure4.

Figure 4

15. Hinged Base:
During installation
of the hinged base,
it is important not
to allow the fan to
go beyond 90º, see
Figure 5.

Figure 5

Figure 3 - Typical Wiring Diagram

Steel Grease Fan4

Commercial Kitchen Installation

Commercial kitchen installations must comply with
NFPA 96. Check local and national codes for these
installations and consult local code authorities for other
specific requirements.

Perform steps 1-15: Typical Roof Mounting Installation.

NEMA 3R
Disconnect
wired to
motor
through
breather tube

Minimum 40 in.

(1016 mm)

Discharge

Height

Grease
Trap

8 in. (203 mm)

minimum

Roof Deck

Welded Duct

(by others)

Minimum of

18 in. (457 mm)

above roof deck

per NFPA

Recommended

Roof Opening

Hinged Base

Optional Vented
Curb Extension

External Wiring
Liquid Tight
Flexible Conduit

(by others)

Figure 6 - Typical Roof Mounting Installation

IMPORTANT

The size of the duct must be equal to or larger than
the inlet opening of the fan.

To comply with NFPA 96, the fan discharge must be a
minimum of 40 in. (1016 mm) above the roof surface
and a minimum of 10 ft. (3048 mm) from any building
air intake.

Per NFPA 96, ductwork to an upblast discharge
exhaust fan must be constructed of and supported by
carbon steel not less than No. 16 MSG (1.52mm) or
stainless steel not less than No.18 MSG (1.21 mm) in
thickness. Duct must also extend a minimum of 18 in.
(457 mm) above the roof surface.

Ensure that a minimum of 500 ft/min of air velocity
through the duct is maintained per NFPA 96, clause

8.2.1.1, 2014 edition and UL 762, Issue #7, clause 6.2,
October 14, 2013.

The following accessories may be required by NFPA
96 depending upon installation: Grease Trap and
Vented Curb. 8.2.1.1, 2014 edition and UL 762, Issue
#7, clause 6.2, October 14, 2013.

The following accessories may be required by NFPA
96 depending upon installation: Grease Trap and
Vented Curb.

IMPORTANT

Minimum duct velocities must be maintained in
kitchen exhaust applications. If a speed controller is
used, ensure compliance with all applicable codes.

–Important–

461546

Representation of

UL Listed

Power Ventilator

Restaurant

Exhaust

Appliances

label

Power
Ventilator
Restaurant
Exhaust
Appliances
13G3
Maximum
Operating
Temperature
400°F

ELECTRICAL – If fan motor is NOT thermally protected, remote
overload protection must be installed having adequate rating as to
voltage, frequency, horsepower, and full load current per phase.
Where connected to a circuit protected by fuses, use time delay fuses.
For supply connection use wires rated for at least 90°C (194°F).

INSTALLATION – When connecting electrical power to this fan,
do not restrict motor movement for possible future belt or wheel
adjustment.

Must be installed in accordance with the requirements to NFPA 96 or
must have minimum clearances of zero inches to non-combustibles,
3 inches to limited combustibles, 18 inches to combustibles.

CAUTION – Mount with the lowest moving part at least 8 ft

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ventilators or duct mounted ventilators provided with belt guards.
ATTENTION – Monter la pièce mobile la plus basse à au moins

2,5 m au-dessus du niveau du sol. Non requis pour les ventilateurs
montés sur un toit ou pour les ventilateurs montés sur gaine avec
protège-courroie.

Grease Trap Installation

The polypropylene grease trap is designed to collect
grease residue and avoid drainage onto roof surface.
Follow all local codes, as well as the National Fire
Protection Agency (NFPA) where applicable.

NFPA 96:

readily accessible and visible grease receptacle not to
exceed 1 gal. (3.8L)

Refer to Document 476370 - Grease Trap Installation,
Operation and Maintenance Manual for parts listing and
specific installation instructions.

Grease Trap Maintenance

Regular inspection of grease trap is recommended.
Depending on the amount of grease discharged through
the fan, the grease trap should be cleaned regularly to
ensure proper operation.

• Check grease absorber (if included) every month.

• Replacement grease absorbers (Part No. 476084)

Upblast fans shall have a drain directed to a

Replace grease absorber after every cleaning and/
or as needed between cleanings.

can be ordered from your local representative.

Steel Grease Fan 5

Pre-Starting Checks

1. Check all fasteners and setscrews for tightness.
The wheel should rotate freely and be aligned as
shown in Figure 8.

Fan Size

Overlap

140-160 1/4 (6)

180-200 1/2 (13)

Figure 8

Overlap
in. (mm)

2. Wheel position is preset and the unit is test run at
the factory. Movement may occur during shipment
and realignment may be necessary.

3. Centering can be accomplished by loosening
the bolts holding the drive frame to the vibration
isolators and repositioning the drive frame.

4. Wheel and inlet cone overlap can be adjusted
by loosening the setscrews in the wheel hub and
moving the wheel to the desired position.

5. Check wheel rotation (viewing from the shaft side)
by momentarily energizing the unit. Rotation should
be clockwise as shown in
Figure 9 and correspond to the
rotation decal on the unit.

6. If wheel rotation is incorrect,
reverse two of the wiring leads
or check motor wiring for single
phase. Fan RPM should be
checked and verified with a
tachometer.

Clockwise Rotation

Figure 9

WARNING

Correct direction of wheel rotation is critical. Reversed
rotation will result in poor air performance, motor
overloading and possible motor burnout.

AVERTISSEMENT

La turbine doit impérativement tourner dans le bon
sens. Une rotation en sens inverse entraînerait de
mauvaises performances de soufflage, une surcharge
du moteur voire un grillage du moteur.

7. Always loosen tension enough to install belts
without stretching. Do not force belt(s). Forcing the
belts will break the cords and cause belt failure.
See Figure 10.

Figure 10

8. For units with two groove pulleys, adjust so the
tension is equal in both belts.

9. If adjustments are made, it is very important to
check the pulleys for proper alignment. Misaligned
pulleys lead to excessive belt wear, vibration, noise
and power loss. See Figure 11.

CORRECT WRONG WRONG WRONG

Figure 11

10. Belt tension can be adjusted by loosening four
fasteners on the drive frame. See Figure 12. The
motor plate slides on the slotted adjusting arms
and drive frame angles in the same manner.

Four (4) fasteners in total.

Identical fasteners
on opposing
side must also be
loosened.

Figure 12

11. Belt tension should be adjusted to allow 1/64inch
(0.397 mm) of deflection per inch of belt span. For
example, a 15 inch (381 mm) belt span should have
15/64 inch (5.95 mm)
(or about 1/4 inch
(6 mm)) of deflection
with moderate
thumb pressure at

Deflection =

Belt Span

64

Belt

Span

mid-point between
pulleys. See

Figure 13

Figure13.

12. The adjustable motor pulley is factory set for the
RPM specified. Speed can be increased by closing
or decreased by opening the adjustable motor
sheave. Two groove variable pitch pulleys must be
adjusted an equal number of turns open or closed.

13. Any increase in speed represents a substantial
increase in the horsepower required by the unit.

14. Motor amperage should always be checked to
avoid serious damage to the motor when speed is
varied.

IMPORTANT

The fan has been checked for mechanical noises at
the factory prior to shipment. If mechanical noise
should develop, suggested corrective actions are
offered in the Troubleshooting section.

IMPORTANT

Over tightening will cause excessive bearing wear and
noise. Too little tension will cause slippage at startup
and uneven wear.

Steel Grease Fan6

Operation

Inspection

1. Before starting up or operating fan, check all
fasteners for tightness. In particular, check the
setscrews in wheel hub and pulleys.

2. While in the OFF position or before connecting the
fan to power, turn the fan wheel by hand to be sure it
is not striking the venturi or any obstacle.

3. Start the fan and shut it off immediately to check
rotation of the wheel with directional arrow in the
motor compartment. See Figure 9 on page 6.

4. When the fan is started, observe the operation and
check for any unusual noises.

5. With the system in full operation and all ductwork
attached, measure current input to the motor and
compare with the nameplate rating to determine if
the motor is operating under safe load conditions.

6. Keep inlets and approaches to fan clean and free
from obstruction.

IMPORTANT

Adjust (tighten) belt tension after the first 24-48 hours
of operation.

Inspection of the fan should be conducted at the
first 30 minute and 24 hour intervals of satisfactory
operation.

30 Minute Interval: Inspect bolts, setscrews and motor
mounting bolts. Adjust and tighten as necessary.

24 Hour Interval: Check all internal components.
Inspect belt alignment and tension. Adjust and tighten
as necessary.

Steel Grease Fan 7

Maintenance

Belt and Bearing Maintenance

DANGER

Disconnect and secure to the “off” position all
electrical power to the fan prior to inspection or
servicing. Failure to comply with this safety precaution
could result in serious injury or death.

DANGER

Pour écarter les risques de blessure grave ou de mort,
débrancher et verrouiller l’alimentation électrique en
position « Arrêt » avant tout contrôle ou entretien.

WARNING

This unit should be made non-functional when
cleaning the wheel or housing (fuses removed,
disconnect locked off).

AVERTISSEMENT

L’appareil doit être rendu non opérationnel lors du
nettoyage de la turbine ou du caisson (fusibles retirés,
sectionneur verrouillé).

IMPORTANT

Uneven cleaning of the wheel will produce an out of
balance condition that will cause vibration in the fan.

Installation and maintenance are to be performed only
by qualified personnel who are familiar with local codes
and regulations and who are experienced with this type
of equipment.

Motor maintenance is generally limited to cleaning
and lubrication (where applicable). Cleaning should be
limited to exterior surfaces only. Removing dust buildup
on motor housing ensures proper motor cooling.

Greasing of motors is only intended when fittings are
provided. Many fractional horsepower motors are
permanently lubricated and should not be lubricated
after installation. Motors supplied with grease fittings
should be greased in accordance with manufacturer’s
recommendations. Where motor temperatures do not
exceed 104ºF (40ºC), the grease should be replaced
after 2,000 hours of running time as a general rule.

Wheels require much attention when moving air
in grease applications. Grease, oil and dust may
accumulate causing imbalance. When this occurs, the
wheel and housing should be cleaned to ensure smooth
and safe operation.

All fasteners should be checked for tightness each time
maintenance checks are performed prior to restarting
unit.

When installing fans for restaurant exhaust applications
follow NFPA 96 for cleaning fans.

Grease containers must be emptied at regular intervals
to prevent overflow.

A proper maintenance program will help these units
deliver years of dependable service.

1. Belts tend to stretch after a period of time. They
should be checked periodically for wear and
tightness. When replacing belts, use the same type
as supplied with the unit.

2. Matched belts should always be used on units with
multi-groove pulleys.

3. For belt replacement, loosen the tensioning device
enough to allow removal of the belt by hand. Do not
force belts on or off.

4. Once installed, adjust belts as shown in
“Pre-Starting Checks.”

5. To ensure tightness, check pulley setscrews. Proper
keys must be in keyways.

6. Fan RPM should not be readjusted. Only use
pulleys of identical size and type when replacing
pulleys.

7. On steel grease fans, the standard cast pillow block
bearings are factory lubricated and are provided
with external grease fittings. Annual lubrication
is recommended, or more frequently if needed.
See Table 2 on page 9. Do not over-grease. Use
only one or two shots of lubricant with a hand
gun. Maximum hand gun rating is 40 psi. Rotate
bearings during lubrication where good safety
practice permits. Caution should be employed to
prevent over packing or contamination.

8. Units installed in hot, humid or dirty locations
should be equipped with special bearings. These
bearings will require frequent lubrication. Caution
should be employed to prevent over packing or
contamination.

9. Grease fittings should be wiped clean. The unit
should be in operation while lubricating bearings.
Extreme care should be used around moving parts.

10. Grease should be pumped in very slowly until a
slight bead forms around the seal. A high grade
lithium base grease should be used. See Table 3 on
page 9.

11. During the first few months of operation, check
bearing setscrews periodically to ensure tightness.

12. If unit is to be left idle for an extended period,
remove belts and store in a cool, dry place to avoid
premature belt failure.

Steel Grease Fan8

Recommended Bearing Lubrication
Frequency in Months

Note: If unusual environment conditions exist (extreme
temperature, moisture or contaminants), more frequent
lubrication is required.

A good quality lithium base grease, conforming to NLGI
Grade 2 consistency, such as those listed in Table 3
may be used.

Table 2: Suggested Fan Bearing Lubrication Intervals

Interval

(months)

1 to 3

3 to 6

6 to 12 8 to 16 hours per day in clean, relatively dry atmosphere

12 to 18 Infrequent operation or light duty in clean atmosphere

Heavy duty in dirty, dusty locations; high ambient
temperatures; moisture laden atmosphere; vibration.

12 to 24 hours per day, heavy duty, or if moisture is
present

Type of Service

Fan Inlet Connections

In order to ensure proper fan performance, caution
must be exercised in fan placement and connection to
the ventilation system. Obstructions, transitions, poorly
designed elbows, improperly selected dampers, etc.,
can cause reduced performance, excessive noise and
increased mechanical stress. For performance to be as
published, the system must provide uniform and stable
airflow into the fan.

Poor

Poor

Table 3: Grease Manufacturers

Manufacturer Grease (NLGI #2)

U.S. Electric Motors Grease No. 83343

Chevron U.S.A. Inc Chevron SRI Grease #2

Mobil Oil Corporation

Texaco, Inc.

Amoco Oil Co. Rykon Premium #2

Exxon Unirex N2

Shell B Shell Alvania #2

Mobilith

Mobil 532

Premium BRB #2

Texaco Multifak #2

Dampers must open fully.
Use motorized dampers in
low airflow applications to
reduce losses.

Good

Provide uniform airflow at
fan inlet and through the
damper to ensure optimum
performance. Curb cap
should be three wheel
diameters from the radius.
Use turning vanes in duct
when possible.

Avoid sharp turns or
entrance conditions which
cause uneven flow. Use
turning vanes in elbows to
reduce adverse effects.

Good

Provide uniform airflow at
fan inlet to ensure optimum
performance.

Steel Grease Fan 9

Troubleshooting

WARNING

Before taking any corrective action, make certain unit
is not capable of operation during repairs.

PROBLEM CAUSE CORRECTIVE ACTION

Wheel rubbing inlet Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.

Tighten pulleys on motor/fan shaft. Adjust belt tension. Align pulleys properly,
see page 6, Figures 10 and 11. Replace worn belts or pulleys.

Replace defective bearing(s). Lubricate bearings. Tighten collars and
fasteners.

Center wheel on inlet, page 6, Figure 8.

Remove objects, check for damage or unbalance.

Replace motor with same frame size, RPM-HP.

Resize ductwork. Check proper operation of face and bypass dampers. Check
filters and access doors.

Check fuses/circuit breakers. Check for switches off. Check for correct supply
voltage.

Replace damaged bearing. Relieve excessive belt tension. Align bearings.
Check for bent shaft.

Check drives or slow down fan by opening variable pitch pulley on motor
shaft.

Check system: Proper operation of backdraft or control dampers, obstruction
in ductwork, clean dirty filters.

Excessive
noise or
vibration

High
horsepower

Fan doesn’t
operate

Motor
overloads or
overheats

Reduced
airflow

V-belt drive

Bearings

Wheel unbalance Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.

Belts too tight or too loose Adjust tension, see page 6, Figures 12 and 13.

Wheel improperly aligned and
rubbing

Loose drive or motor pulleys Align and tighten. See Pre-Starting Checks, page 6.

Foreign objects in wheel or
housing

Fan base not securely anchored Secure properly.

Motor hood loose and rattling Tighten fasteners to secure motor hood.

Defective or loose motor
bearings

Fan Check rotation of wheel, see page 6, Figure 9. Reduce fan speed.

Duct system

Electrical supply

Drive Check for broken belts. Tighten loose pulley or belts.

Motor Ensure motor is correct horsepower and not tripping overload protector.

Lubrication Check for excessive or insufficient grease in the bearing.

Mechanical

Belt slippage Adjust tension or replace bad belts, see page 6.

Over/Under line voltage Contact power company.

Incorrect wheel rotation Check motor wiring, see page 4, Figure 3.

Wheel RPM too high

Undersized motor Check motor ratings with catalog speed and air capacity chart.

Motor wired incorrectly Check motor wiring to wiring diagram located on fan motor.

System resistance too high

Unit running backwards Correct as shown on page 6, Figure 9.

Excessive dirt buildup on wheels Clean wheel.

Improper wheel alignment Center wheel on inlets, see Pre-Starting Checks, on page 6.

Dampers closed Inspect and repair.

Blocked duct/clogged filter Clean or replace.

Belt slippage Replace and adjust tension.

Speed to slow Check for correct drives.

Avant d’entreprendre toute action corrective, s’assurer
que l’appareil ne pourra pas fonctionner durant les
réparations.

AVERTISSEMENT

Steel Grease Fan10

Parts List

Each fan bears a manufacturer’s nameplate with model
number and serial number embossed. This information
will assist the local representative and the factory in
providing service and replacement parts. Before taking
any corrective action, make certain unit is not capable
of operation during repairs.

NOTE

For replacement, the windband, vertical supports,
drain trough and curb cap with mounting holes comes
as one complete assembly.

Belt(s)

Shaft Pulley

Fan Shaft

Bearings

Vibration Isolators (4)

(not visible)

Clean-Out Port

CAUTION

A fan manufactured with an explosion resistant motor
does not certify the entire unit to be explosion proof.
Refer to ULListing mark for the fans approved usage.

CAUTION

La présence d’un moteur antidéflagrant sur un
ventilateur ne garantit pas que tout l’appareil est
antidéflagrant. Pour connaître les emplois autorisés
de l’appareil, voir son marquage de conformité UL.

Motor Pulley

Motor

Motor Cover

Hoodband

Windband

Disconnect Switch

Horizontal Supports

Non-Stick Wheel

Breather Tube

Vertical Supports

Curb Cap with
Mounting Holes

Steel Grease Fan 11

Our Commitment

Our Commitment

As a result of our commitment to continuous improvement, Accurex reserves the right to change specifications
without notice.

Product warranties can be found online at accurex.com, either on the specific product page or in the Warranty
section of the website at Accurex.com/Resources/Warranty.

P.O. Box 410 Schofield, WI 54476
Phone: [phone] • Fax: [phone]
Parts: 800.355.5354 • accurex.com

12

470311 • XRUBS, Rev. 5, July 2019 © 2019 Accurex, LLC12