Accurex XRUB Installation Manual

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 (229to 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

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

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 Figure2 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

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