Page 1
Document 474737
Model XRUD Direct Drive
Model XRUB Belt Drive
Upblast Centrifugal Roof Exhaust
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.
Direct Drive
Upblast Centrifugal Exhaust Fan
These fans are specifically designed for
roof and wall mounted applications. The
maximum continuous operating temperature
for fan sizes 099-300 is 400°F (204°C)
and for fan sizes 060-095 is 130°F (54°C).
Direct drive fans are available with nominal
wheel diameters ranging from 9 to 30
inches (229to 762 mm) (060-300 unit sizes).
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 Electrical 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.
Belt Drive
Upblast Centrifugal Exhaust Fan
These fans are specifically designed for
roof and wall mounted applications. The
maximum continuous operating temperature
is 400°F (204°C). Belt drive fans are available
with nominal wheel diameters ranging
from 10 to 48 inches (254 to 1219 mm)
(099-480 unit sizes). Each fan shall bear
a permanently affixed manufacturer’s
embossed metal nameplate containing the
model number and individual serial number.
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.
Upblast Centrifugal Roof Exhaust 1
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Table of Contents
Receiving, Unpacking, Handling . . . . . . . . . . . 2-3
Storage. . . . . . . . . . . . . . . . . . . . . . . . . 3
Inspection and Maintenance During Storage . . . . . 3
Removing from Storage . . . . . . . . . . . . . . . . 3
Dimensional Data . . . . . . . . . . . . . . . . . . . 4
Installation
General Ventilation Installation . . . . . . . . . . . 4
Sidewall Mounting Installation . . . . . . . . . . . . 5
Commercial Kitchen Installation . . . . . . . . . . . 5
Grease Trap Installation . . . . . . . . . . . . . . . 6
Hinge Installation. . . . . . . . . . . . . . . . . . . 6
Mounting for Severe Duty Installation . . . . . . . 6-7
Pre-Starting Checks . . . . . . . . . . . . . . . . . 7-8
Operation. . . . . . . . . . . . . . . . . . . . . . . . 8
Inspection . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . 8-9
Tapered Bushing Hub Installation
and Removal . . . . . . . . . . . . . . . . . . . . . 9
Bushing Installation . . . . . . . . . . . . . . . 9-10
Belt and Bearing Maintenance. . . . . . . . . . . .10
Bearing Lubrication Schedule . . . . . . . . . . . .10
Parts List . . . . . . . . . . . . . . . . . . . . . . . .11
Fan Inlet Connections . . . . . . . . . . . . . . . . .11
Troubleshooting . . . . . . . . . . . . . . . Backcover
Our Commitment. . . . . . . . . . . . . . . Backcover
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.
Handling
Direct and Belt Drive Units
Lift Direct Drive unit on to the roof utilizing hooks under
the horizontal supports. Evenly space the hooks using
a minimum of four lifting straps. Use a spreader bar to
ensure the straps do not come in contact with the unit,
see Figure 1.
Figure 1
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.
Figure 2
Figure 3
Screw
Hook With
Safety Latch
(Supplied by others)
(2) Bearing Plate
Lifting Points
(4) Drive Frame
Lifting Points
Screw
Upblast Centrifugal Roof Exhaust2
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When lifting a Belt Drive 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 Figure2 for
lifting points. Access to the drive frame is accomplished
by removing the screws pointed out in Figure 3. The
cover can then be removed and placed on a flat surface
in an area protected from strong winds.
When the Direct and/or Belt Drive unit is on the roof,
move fan to desired location using lifting points and
fasten securely through mounting holes in base. Shims
may be necessary depending upon roofing material
thickness.
The motor amperage and voltage ratings must be
checked for compatibility to supply voltage prior to
final electrical connection. For Direct and/or Belt Drive
installations, the electrical supply should be routed
through the conduit chase located between the curb
cap and the bottom of the motor compartment or
through the breather tube. Wiring must conform to local
and national codes.
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)
(wide temperature swings may cause 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.
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
hard to reach internal surfaces or for occasional use,
consider using Tectyl® 511M Rust Preventive, WD-40®
or the equivalent.
®
506 (Ashland Inc.) or the equivalent. For
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.
IMPORTANT
Installation, troubleshooting and parts replacement
are to be performed only by qualified personnel.
Consult and follow all applicable national, state and
local codes. They will supercede this document.
Upblast Centrifugal Roof Exhaust 3
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Dimensional Data
Direct Drive
Model Size Curb Cap Damper
060, 070 17 (432) 8 (203) 101⁄2 (267) 17 (432) 29 (13)
080, 090, 095 19 (483) 10 (254) 12
099, 101,
121, 131
141, 161 22 (559) 16 (406) 18
180, 200,
200HP
240, 240HP 34 (864) 24 (610) 26
300, 300HP 40 (1016) 30 (762) 321⁄2 (826) N/A 313 (142)
• All dimensions are in inches (millimeters). *Approximate weight shown in
lbs. (kg.) is the largest cataloged open drip proof motor.
• “Curb Cap” 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.
• Roof/wall opening is a square dimension.
19 (483) 12 (305) 14
30 (762) 18 (457) 20
Roof/Wall
Opening
1
⁄2 (318) 19 (483) 40 (18)
1
⁄2 (368) 19 (483) 67 (30)
1
⁄2 (470) 22 (559) 90 (41)
1
⁄2 (521) 30 (762) 142 (64)
1
⁄2 (673) N/A 175 (79)
Wall Opening
with a curb
*Approx.
Weight
Belt Drive
Model Size Curb Cap
099, 101,
101HP, 121,
131
141, 141HP,
161, 161HP
161XP 22 (559) 1 (25) 16 (406) 18
180 30 (762)3⁄4 (19) 18 (457) 201⁄2 (521) 30 (762) 126 (57)
180HP 30 (762) 1 (25) 18 (457) 201⁄2 (521) 30 (762) 126 (57)
200 30 (762)
200HP 30 (762) 1 (25) 18 (457) 201⁄2 (521) 30 (762) 142 (64)
220, 220HP,
240, 240HP,
240 XP
300, 300HP,
300XP
360, 360HP,
360XP
420 52 (1321) 11⁄4 (32) 42 (1067) 441⁄2 (1130) N/A 578 (262)
480 58 (1473) 1
• All dimensions are in inches (millimeters). *Approximate weight shown in
lbs. (kg.) is the largest cataloged open drip proof motor.
• “Curb Cap” 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.
• Roof/wall opening is a square dimension.
19 (483)
22 (559)3⁄4 (19) 16 (406) 181⁄2 (470) 22 (559) 87 (39)
34 (864) 1 (25) 24 (610) 26
40 (1016) 1 (25) 30 (762) 32½ (826) 40 (1016) 313 (142)
46 (1168) 11⁄4 (32) 36 (914) 381⁄2 (978) N/A 440 (200)
Shaft
Bearings
3
3
Damper
⁄4 (19) 12 (305) 141⁄2 (368) 19 (483) 66 (30)
⁄4 (19) 18 (457) 201⁄2 (521) 30 (762) 142 (64)
1
⁄2 (38) 48 (1219) 501⁄2 (1283) N/A 675 (306)
Roof/Wall
Opening
Wall Opening
with a curb
1
⁄2 (470) 22 (559) 87 (39)
1
⁄2 (673) 34 (864) 175 (79)
*Approx.
Weight
Installation
General Ventilation Installation
Screw
Conduit
Chase
3/4 in.
(19 mm)
8 or 12 in. min.
(203 or 305 mm)
Roof Deck
(32 mm)
1¼ in.
Wiring by
Others
Damper
Recommended
Duct and
Damper Size
Recommended
Roof Opening
Screw
Factory Wired
Motor to
Disconnect
1¼ in.
(32 mm)
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. If unit is equipped with
a backdraft damper, it
should be installed now.
3. Remove motor cover.
Access to the motor
compartment is
accomplished by
Figure 5 - Roof Curb Installation
removing the screws as shown in Figure 3, page 2.
4a. On belt drive fans, use the lifting lugs on the drive
frame or bearing plate to lift and place the unit on
top of roof curb. Refer to Figure 2, page 2.
4b. On direct drive fans, lift and place the unit on
top of roof curb using hooks under the horizontal
supports. Refer to Figure 1, page 2.
5. Secure fan to curb using a minimum of eight lag
screws, metal screws or other suitable fasteners.
Shims may be required depending upon curb
installation and roofing material.
6. Verify power line wiring is de-energized before
connecting fan motor to power source.
7. For commercial kitchen and UL Listed emergency
smoke control applications, the electrical supply
must enter the motor compartment through
the breather tube. For other non-flammable
applications, the electrical supply can be routed
through the conduit chase between the curb cap
and the bottom of the motor compartment.
8. 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.
9. Check fan wheel for free rotation, recenter if
necessary. Check setscrew(s) for tightness.
10. Check all fasteners for tightness.
11. Mount and wire safety disconnect switch under
motor cover. Wire control switches at ground level,
refer to Figure 6.
MOTOR
SUPPLY VOLTAGE
115/208-230/60/1
J-BOX
L1
L2
Figure 6 - Typical Wiring Diagram
MOTOR
J-BOX
SUPPLY VOLTAGE
208-230/460/60/3
L1
L2
L3
12. Replace motor cover.
Figure 4 - Typical Roof Mounting Installation
Upblast Centrifugal Roof Exhaust4
Page 5
Vari-Green
®
Wiring
For Vari-Green wiring refer to the Vari-Green Motor
and Controls Installation, Operation and Maintenance
Manual for complete wiring and operation instructions.
Sidewall Mounting Installation
1. Cut an appropriate sized hole in the wall and follow
manufacturer's instructions on curb installation.
Mount the curb to the interior of the wall with
a minimum of eight 3/8-inch fasteners around
the flange. Caulk and flash the curb to ensure a
watertight seal.
2. If unit is equipped with a backdraft damper, it
should be installed now.
3. Lift the fan into place. Do NOT support the unit by
the hoodband during installation.
4. Orient fan so the grease trough is downward and
secure fan to curb using a minimum of eight lag
screws, metal screws or other suitable fasteners.
5. Follow steps 6 through 12 of General Ventilation
Installation instructions on page 4.
Standard
Wall
Unit
Grease Trough
Hoodband
Grease Trough
Standard Roof Curb
Pointed Down
Wall
Unit
Figure 7 - Typical Sidewall Mounting Installation
Roof Curb
Wall Opening
Secure standard
roof curb flange
to wall opening
Minimum of
(8) 3/8 inch
fasteners around
the flange
Commercial Kitchen Installation
Commercial
Screw
kitchen
installations
must comply
with NFPA 96.
Check local
and national
codes for these
installations
and consult
local code
Minimum 40 in.
(1016 mm)
Discharge Height
(per NFPA)
Optional
Grease
Trap
8 in. min.
(203 mm)
Roof Deck
Welded Duct
by others
minimum of
18 in. (457 mm)
above roof
deck
(per NFPA)
authorities for
other specific
requirements.
Figure 8
Typical Roof Mounting Installation
Recommended
Roof Opening
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
watertight seal.
2. If unit is equipped with a backdraft damper. DO NOT
install it.
Perform steps 3 - 12 of General Ventilation 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.6MSG (1.52mm) 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 NFPA96, clause
8.2.1.1, 2014 edition and UL762, Issue #7, clause 6.2,
October 14, 2013.
The following accessories may be required by
NFPA96 depending upon installation: Grease Trap,
Hinge Kit or Hinged Base, Clean-Out Port, and Vented
Curb.
Minimum duct velocities must be maintained in
kitchen exhaust applications. If a speed controller is
used, ensure compliance with all applicable codes.
Screw
Optional
NEMA 3R
Disconnect
wired to
motor through
the breather
tube
Optional
Vented Curb
Extension
Liquid Tight
Flexible Conduit
by Others
Representation of
UL Listed
Power Ventilator
label
Power
Ventilator
565L
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,
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movement for possible future belt or wheel adjustment.
CAUTION – Any fan inlet or outlet that is non-ducted must be
protected by an appropriate guard.
ATTENTION – Tout ouverture d’admission ou de refoulement
du ventilateur non raccordée à une gaine doit comporter une
protection adaptée.
–Important–
460420
Representation of
UL Listed
Power Ventilator
Restaurant
Exhaust
Appliances
label
–Important–
461546
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
PDERYHÀRRURUJUDGHOHYHO1RWUHTXLUHGRQURRIPRXQWHG
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.
Upblast Centrifugal Roof Exhaust 5
Page 6
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:
Upblast fans shall have a drain directed to a
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 list 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.
Replace grease absorber after every cleaning and/
or as needed between cleanings.
• Replacement grease absorbers (P/N 476084) can
be ordered from your local representative.
Hinge Installation
NFPA 96: Upblast exhaust fans shall be supplied with a
hinge.
Refer to listed Installation, Operation and
Maintenance Manuals for parts list and specific
installation instructions:
Document 481937 - Sidewall Mount Hinge Kit
Document 481366 - Bracket Hinge Kit
Document 462865/462866 - Hinge Kit
Mounting for Severe Duty Installation
IMPORTANT
Only qualified installers should perform this work.
Manufacturer assumes no liability for damages
resulting from installation.
Installation instructions for seismic ratings are only
recommendations. Final design must be determined
by Structural Engineer of Record (SEOR) including
requirements for curb construction, mounting of unit
to curb and mounting of curb to structure.
Fan to Curb Mounting: 5/16-inch (7.9 mm) self-drilling
fasteners are to be installed on each side of fan with
one fastener 4-inches (102 mm) from each edge and
one fastener in the center, Figure 9. Fasteners are to be
equally spaced.
Fan Size
≤ 161 3
180 to 240 5
≥ 300 9
Roof Curb Models
GPF, GPFHL,
GPFHD or Equilvalent
18 ga. min.
High Wind Ratings
42 in. Tall Max
Seismic Ratings
24 in. Tall Max
Welded Steel Construction
Figure 9 - Fan to Curb Mounting
Fasteners
per Side
Unit
1¼ in.
Curb Corner
Anchor Detail
in
1¼
Optional Hinged Base Mounting: For installations
that include the optional hinged base accessory, the
fan must be secured to the hinged base and curb using
the correct number of fasteners as shown in the “Fan to
Curb Mounting” section. All fasteners must be installed
through the curb cap of the fan, the hinged base, and
the curb. All fasteners must be reinstalled after each
time the fan is hinged open, see Figure 10.
All fasteners
must penetrate
curb and must
be reinstalled
after each
service.
Figure 10 - Fasteners
Upblast Centrifugal Roof Exhaust6
Page 7
Curb to Deck Mounting: Fasteners need to be located
on all four sides of the curb, Figures 11a and 11b.
Figure 11a
Roof Curb Roof Curb
3/8 in. (10 mm) S.S. Hilti Kwik Bolt 3
Expansion Anchors
Min. 2-1/2 in. (64mm) Engagement
3000 Min. PSI
Concrete
Concrete Anchoring Steel Anchoring
Figure 11b
Roof Curb
Wood Timber
Min. 4 in. (102 mm)
Nominal Thickness
Min. G=0.42
G = specific gravity
of lumber
Timber Anchoring
1/4 in. - 14 Self-Drilling Screw Min.
1/2 in. (13 mm) of Threads Through
Roof Truss
1/8 in. (3 mm)
Thick or 12 ga. Min.
3/8 in. (10 mm) Lag Bolt (Zinc Plated)
Min. 3 in. (76 mm) Thread Engagement
High Wind Ratings Seismic Ratings
Fasteners Fasteners
Fan
Size
≤
161
>
Steel
161
≤
161
>
161
Concrete
≤
161
>
Wood
161
All dimensions are in inches
Curb Cap Size
inches (millimeters)
17x17 to 22x22
(432x432 to 559x559 mm)
26x26 to 40x40
(660x660 to 1016x1016 mm)
17x17 to 22x22
(432x432 to 559x559 mm)
26x26 to 40x40
(660x660 to 1016x1016 mm)
17x17 to 22x22
(432x432 to 559x559 mm)
26x26 to 40x40
(660x660 to 1016x1016 mm)
(millimeters)
Per
Total Fan Size
Side
3 12 060-240 2 8
4 16 300-360 3 12
420-480 5 20
3 12 060-240 2 8
3 12 300-360 3 12
420-480 5 20
3 12 060-240 2 8
4 16 300-360 3 12
.
420-480 5 20
Per
Side
Total
Pre-Starting Checks
1. Check all fasteners and setscrews for tightness.
The wheel should rotate freely and be aligned as
shown in Figure 12.
Model Type
Direct Belt
X – 060-095 – 3/32 (2)
X X 099-161 1/4
X X 180-300 1/2 (13) –
– X 360-480 3/4 (19) –
G
Model
Size
G - Overlap
inch (mm)
(6) –
H
H - Gap
inch (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.
Centering the wheel can be accomplished by
loosening the bolts on the support pan and moving
support pan until wheel is properly aligned. For
units with drive frame mounting, loosen the bolts
holding the drive frame to the vibration isolators
and reposition the drive frame if additional
movement is needed for wheel alignment.
Wheel and inlet cone overlap can be adjusted
by loosening the setscrews in the wheel hub and
moving the wheel to the desired position. For
direct and belt drive models with wheel hubs and
shaft pulleys utilizing tapered bushing interface,
reference page 9 for tapered bushing removal and
move the wheel to the desired position.
3. Check wheel rotation (viewing from the shaft side)
by momentarily energizing the unit. Rotation should
be clockwise as shown in
Figure 13 and correspond to
the rotation decal on the unit.
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.
Figure 13
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.
Belt Drive Pre-Starting Belt Tension Checks
4. Always loosen tension
enough to install belts
without stretching.
Do not force belt(s) see
Figure 14. Forcing belts
will break the cords and cause belt failure.
5. For units with two groove pulleys, adjust so the
tension is equal in both belts.
6. 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 15.
CORRECT WRONG WRONG WRONG
Figure 14
Figure 12
Wheel Overlap and Gap Dimension
Figure 15
Upblast Centrifugal Roof Exhaust 7
Page 8
7. Belt tension can be adjusted by loosening four
fasteners on the drive frame, see Figure 16.
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.
8a. Sizes 099-161: Belts should be tensioned just
enough to prevent slippage at full load. Belts
should have a slight bow on the slack side while
running at full load; see Figure 17a.
8b. Sizes 180-480: Belt tension should be adjusted to
allow 1/64 in. (0.397 mm) of deflection per inch of
belt span. For example, a 15 in. (381 mm) belt span
should have 15/64 in. (5.95 mm) (or about 1/4 in.
(6 mm)) of deflection with moderate thumb pressure
at mid-point between pulleys, see Figure 17b.
Figure 17a
Figure 16
Figure 17b
Operation
1. Before starting up or operating fan, check all
fasteners for tightness. In particular, check the
setscrews in the wheel hub (or the tapered bushing
and pulleys if applicable).
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, reference Figure 13.
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 24-48hours
of operation.
Slack
Side
9. The adjustable motor pulley is factory set for
the RPM specified. Speed can be increased by
closing or decreased by opening the adjustable
motor pulley.
10. Any increase in speed represents a substantial
increase in the horsepower required by the unit.
11. 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 belts will cause excessive bearing
wear and noise. Too little tension will cause slippage
at startup and uneven wear.
Inspection
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. On
belt drive unit only, inspect belt alignment and tension.
Adjust and tighten as necessary.
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.
WARNING
This unit should be made non-functional when
cleaning the wheel or housing (fuses removed,
disconnect locked off).
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.
AVERTISSEMENT
L’appareil doit être rendu non opérationnel lors du
nettoyage de la turbine ou du caisson (fusibles retirés,
sectionneur verrouillé).
Upblast Centrifugal Roof Exhaust8
Page 9
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 very little attention when moving clean
air. Occasionally, 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.
Tapered Bushing Hub Installation
and Removal
For wheel hubs and shaft pulleys utilizing a tapered
bushing interface, follow this procedure for installation
and removal. There are two possible set ups for the
tapered bushing, both have the same procedure, but
orientation of the hub varies.
Tapered Bushing Removal:
1. If present, loosen the setscrew holding the bushing
and shaft key in place.
2. Loosen and remove the socket head cap screws
which fasten the bushing to the hub as shown in the
section views and examples of Figures 18-21.
3. Standard Mounting: Take the two socket head cap
screws that were removed and install them into the
visibly threaded holes on the wheel hub.
Reverse Mounting: Install the two socket head cap
screws into the visibly threaded holes of the bushing
flange.
4. Once both socket head cap screws are installed,
tighten them an eighth of a turn at a time, alternating
between the two until the hub comes loose from the
bushing.
Standard Mounting Reverse Mounting
Bushing
Hub
Washers
Cap Screws
Figure 18 Figure 19
Figure 20
Standard Bushing Orientation
Hub
Bushing
Washers
Cap Screws
Figure 21
Reverse Bushing Orientation
Bushing Installation
1. Clean all surfaces of hub and bushing to remove any
oil or residue present and do not use any lubricant to
install bushing into the hub. For both standard and
reverse mounting styles, the socket head cap screws
are adjustable from the inlet of the fan.
2. Standard Mounting: Slide the bushing and shaft
key onto the fan shaft followed by the wheel and hub
assembly. If present, use the keyway setscrew to
hold the shaft key and bushing in place but DO NOT
overtighten as this can damage the bushing. Align
the unthreaded holes of the hub with the threaded
holes of the tapered bushing.
Reverse Mounting: Slide the wheel and hub
assembly onto the fan shaft followed by the bushing
and shaft key. If present, use the keyway setscrew to
hold the shaft key and bushing in place but DO NOT
overtighten as this can damage the bushing. Align
the unthreaded holes of the tapered bushing with the
threaded holes of the hub.
Upblast Centrifugal Roof Exhaust 9
Page 10
3. Install the two bushing socket head cap screws
into the aligned holes by hand (or without excessive
torque) until the heads of the socket head cap
screws are seated against the mating surface.
4. Adjust the height of the wheel in the fan relative to
the inlet venturi then tighten the two socket head
cap screws an eighth turn at a time in an alternating
fashion and to a torque of 10ft-lbs.
Belt and Bearing Maintenance
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 tensioning device
enough to allow removal of the belt by hand.
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. Shaft bearings can be classified in two groups:
relubricating and non-relubricating. All nonrelubricating bearings on belt drive fans are factory
lubricated and require no further lubrication under
normal use (between -20º to 180ºF (-29º to 82ºC) in
a relatively clean environment).
8. On belt drive 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 1. 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.
9. 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.
10. Grease fittings should be wiped clean. The unit
should be in operation while lubricating bearings.
Extreme care should be used around movingparts.
11. 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 2).
12. During the first few months of operation, check
bearing set screws periodically to ensure tightness.
13. 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.
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 2
may be used.
Table 1: Suggested Fan Bearing Lubrication Intervals
Interval
(months)
1 to 3
3 to 6
6 to 12
12 to 18 Infrequent operation or light duty in clean atmosphere
Table 2: 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
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
8 to 16 hours per day in clean, relatively dry
atmosphere
Type of Service
Mobilith
Mobil 532
Premium BRB #2
Texaco Multifak #2
Upblast Centrifugal Roof Exhaust10
Page 11
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/venturi come as one
complete assembly.
Direct Drive
Motor Cover
Hoodband
Motor
Vibration
Isolators
Wheel
Breather Tube
Birdguard in tube
Drain
Trough
Curb Cap/
Venturi
Hood Clip
Motor
Support Pan
Horizontal
Support
Vertical
Support
Windband
CAUTION
A fan manufactured with an explosion resistant motor
does not certify the entire unit to be explosion proof.
Refer to ULListing 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.
Belt Drive
Motor Cover
Hoodband
Motor
Pulley
Motor
Vibration
Isolators
Hoodband
Bracket
Horizontal
Support
Wheel
Breather Tube
Birdguard in tube
Drain
Trough
Curb Cap/
Venturi
Shaft
Pulley
Belt
Drive Frame
Assembly
Disconnect
Switch
Fan Shaft
Vertical
Support
Windband
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.
Good
Poor
Dampers must open fully. Use
motorized dampers in low airflow
applications to reduce losses.
Poor
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.
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.
Upblast Centrifugal Roof Exhaust 11
Page 12
Troubleshooting
WARNING
Before taking any corrective action, make certain unit
is not capable of operation during repairs.
Avant d’entreprendre toute action corrective, s’assurer
que l’appareil ne pourra pas fonctionner durant les
AVERTISSEMENT
réparations.
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 7, Figures 14 and 15. Replace worn belts or pulleys.
Resize ductwork. Check proper operation of face and bypass dampers.
Check filters and access doors.
Replace damaged bearing. Relieve excessive belt tension. Align bearings.
Check for bent shaft.
Check system: Proper operation of backdraft or control dampers, obstruction in
ductwork, clean dirty filters.
Excessive
noise
or vibration
High
horsepower
Fan does
not operate
Motor
overloads
or overheats
Reduced
airflow
V-belt drive
Bearings Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
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 8, Figures 17a and 17b.
Wheel improperly aligned and rubbing Center wheel on inlet, see page 7, Figure 12.
Loose drive or motor pulleys Align and tighten. See “Pre-Starting Checks”, pages 7 and 8.
Foreign objects in wheel or housing Remove objects, check for damage or unbalance.
Fan base not securely anchored Secure properly.
Motor hood loose and rattling Tighten fasteners to secure the motor hood.
Defective or loose motor bearings Replace motor with same frame size, RPM-HP
Fan Check rotation of wheel, see page 7, Figure 13. Reduce fan speed.
Duct system
Electrical supply Check fuses/circuit breakers. Check for switches off. Check for correct supply voltage.
Drive Check for broken belts. Tighten loose pulleys 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 pages 7 and 8.
Over/Under line voltage Contact power company.
Incorrect wheel rotation Check motor wiring, see page 4, Figure 6. Confirm wheel rotation, see page 7, Figure 13.
Wheel RPM too high Check drives or slow down fan by opening variable pitch pulley on motor shaft.
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 see page 7, Figure 13.
Excessive dirt buildup on wheels Clean wheel, see page 9.
Improper wheel alignment Center wheel on inlet, see “Pre-Starting Checks”.
Dampers closed Inspect and repair.
Blocked duct/clogged filter Clean or replace.
Belt slippage Replace and adjust tension.
Speed too slow Check for correct drives.
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: 800.333.1400 • Fax: 715.241.6191
Parts: 800.355.5354 • accurex.com
12
474737 • XRUD and XRUB, Rev. 12, July 2019 2019 © Accurex, LLC
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