Accurex XID Installation Manual

Document 479990

Model XID Direct Drive

Model XIB Belt Drive

Centrifugal Inline Fans

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.

Square Centrifugal Inline Fans

Fans include both direct- and belt-driven options with backward-inclined
wheels and feature rugged construction, high-efficiency and low sound
levels. These compact inline fans are the ideal selection for indoor clean
air applications including intake, exhaust, return, or make-up air systems.
The square housing design, compact size, and straight-thru airflow also
provide the system designer the flexibility to mount in horizontal and
vertical orientations. Each fan displays a permanently stamped metal
nameplate with complete model number, mark, and unique serial number
for future identification.

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 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.

Centrifugal Inline Fans 1

Table of Contents

Receiving, Unpacking, Handling, Storage ....... 2

Inspection and Maintenance During Storage .... 2

Removing from Storage ..................... 2

Dimensional Data

Direct Drive - Fan and Optional Filter .......... 3

Belt Drive - Fan and Optional Filter ............ 4

Mounting - Horizontal or Base Mount .......... 5

Mounting - Duct or Side Discharge ............ 6

Isolator Information ........................ 6

Pre Start-Up Checks ......................7-8

Operation ................................ 8

Inspection ................................ 8

Troubleshooting ........................... 8

Maintenance .............................. 9

Tapered Bushing Hub Installation & Removal . .9-10

Recommended Bearing Lubrication .......... 10

Parts Lists ............................11-12

Our Commitment ......................... 12

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
a 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 local 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

Move fan to desired location and determine position of
access panels, discharge and motor. Make sure the inlet
and outlet have at least 2½ times the wheel diameter
(duct diameter) before any obstructions like an elbow
or transition. Attach the fan to a suitable framework
as specified; hanging or base vibration isolators are
recommended. See corresponding Fan Dimensions
tables; pages 3 and 4 for physical dimensions. Mounting
dimensions and vibration isolator centerline information
is provided on pages 5 and 6. The motor’s amperage
and voltage ratings must be checked for compatibility
to supply voltage prior to final electrical connection.
Electrical lead-in wires are then connected to the factory
supplied safety disconnect switch. All 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 Storage: 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.

Inspection & 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 on 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
or the equivalent.

®

506 (Ashland Inc.) or the equivalent. For

®

511M Rust Preventive, WD-40®

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.

Centrifugal Inline Fans2

Dimensional Data

1 in. (25mm)

D

C

Figure 1: Direct Drive
Fan Dimensions

B

Direct Drive Fan Dimensions

Size A B C D Damper Weight^

60, 70

80, 90, 95

97, 98, 99

A

100

120

130 (HP)

140 (HP)

160 (HP)

All dimensions in inches (millimeters) and weight is shown in pounds (kilograms).
^Weight shown is standard galvanized construction and largest cataloged open drip proof motor.

12

(305)

15

(381)

15

(381)

17

(432)

19

(483)

21

(533)

23

(584)

26

(660)

13

(330)

16

(406)

21

(533)

21

(533)

21

(533)

21

(533)

22

(559)

26

(660)

12

(305)

15

(381)

15

(381)

17

(432)

19

(483)

21

(533)

23

(584)

26

(660)

87⁄8

(225)

117⁄8

(302)

117⁄8

(302)

137⁄8

(352)

157⁄8

(403)

177⁄8

(454)

197⁄8

(505)

227⁄8

(581)

9

(229)

12

(305)

12

(305)

14

(356)

16

(406)

18

(457)

20

(508)

23

(584)

26

(12)

41

(19)

49

(22)

56

(25)

67

(30)

67

(30)

104

(47)

160

(73)

1 in.

(25mm)

A

C

1 in.

(25mm)

C

B

Figure 2: Direct Drive
Filter Option Dimensions

Direct Drive Filter Option Dimensions

Size A B C Weight^ Filter Size Filter Quantity

60, 70

80, 90, 95

97, 98, 99

100

120

130 (HP)

140 (HP)

160 (HP)

All dimensions in inches (millimeters) and weight is shown in pounds (kilograms).
^ Weight shown is standard galvanized construction and largest cataloged open drip proof motor.
Note: 24 inch side clearance is recommended for accessing and removing filters.

221⁄8

(562)

5

45

(1159)

5

50

(1286)

1

47

(1200)

3

52

(1326)

463⁄8

(1178)

523⁄8

(1330)

513⁄8

(1305)

⁄8

⁄8

⁄4

⁄16

12

(305)

15

(381)

15

381)

(

17

(432)

19

(483)

21

(533)

23

(584)

26

(660)

87⁄8

(225)

117⁄8

(302)

117⁄8

(302)

137⁄8

(352)

157⁄8

(403)

177⁄8

(454)

197⁄8

(505)

227⁄8

(581)

40

(18)

74

(34)

80

36)

(

88

(40)

114

(52)

120

(54)

174

(79)

246

(112)

10 x 12

(254 x 305)

14 x 25

(356 x 635)

14 x 25

356 X 635)

(

16 x 20

(406 x 508)

16 x 25

(406 x 635)

20 x 20

(508 x 508)

20 x 25

(508 x 635)

20 x 20

(508 x 508)

1

1

1

2

2

2

2

4

Centrifugal Inline Fans 3

1-1/2 in.

(38mm)

D

C

Figure 3: Belt Drive
Fan Dimensions

Optional cover varies with
motor size. Recommend
24 inch (610mm) clearance.

Belt Drive Fan Dimensions

Size A B C D *E *F *G Damper Weight^

*E

*F

70, 80, 90

100

120

*G

130 (HP)

140 (HP)

A

160 (HP)

180 (HP)

B

200 (HP)

240 (HP)

300 (HP)

360 (HP)

420

All dimensions in inches (millimeters) and weight is shown in pounds (kilograms).
*Motor cover is optional. Size may be greater depending on motor.
^Weight shown is standard galvanized construction and largest cataloged open drip proof motor.

1

17

(435)

1

17

(435)

1

19

(486)

1

21

(537)

1

23

(587)

1

26

(664)

1

27

(689)

1

31

(791)

1

38

(968)

46

(1168)

52

(1321)

58

(1473)

⁄8

⁄8

⁄8

⁄8

⁄8

⁄8

⁄8

⁄8

⁄8

21

(533)

21

(533)

21

(533)

21

(533)

22

(559)

26

(660)

28

(711)

32

(813)

34

(864)

38

(965)

42

(1067)

50

(1270)

171⁄8

(435)

171⁄8

(435)

191⁄8

(486)

211⁄8

(537)

231⁄8

(587)

261⁄8

(664)

271⁄8

(689)

311⁄8

(791)

381⁄8

(968)

46

(1168)

52

(1321)

58

(1473)

117⁄8

(302)

137⁄8

(352)

157⁄8

(403)

177⁄8

(454)

197⁄8

(505)

227⁄8

(581)

237⁄8

(606)

277⁄8

(708)

347⁄8

(886)

417⁄8

(1064)

477⁄8

(1216)

537⁄8

(1368)

173⁄4

(451)

173⁄4

(451)

20

(508)

20

(508)

20

(508)

20

(508)

20

(508)

30

(762)

30

(762)

34

(864)

34

(864)

34

(864)

13

(330)

13

(330)

17

(432)

17

(432)

17

(432)

17

(432)

17

(432)

20

(508)

20

(508)

22

(559)

22

(559)

22

(559)

131⁄4

(337)

131⁄4

(337)

131⁄4

(337)

131⁄4

(337)

131⁄4

(337)

131⁄4

(337)

131⁄4

(337)

16

(406)

16

(406)

18

(457)

18

(457)

18

(457)

12

(305)

14

(356)

16

(406)

18

(457)

20

(508)

23

(584)

24

(610)

28

(711)

35

(889)

42

(1067)

48

(1219)

54

(1372)

106

(48)

107

(49)

124

(56)

131

(59)

146

(66)

188

(85)

195

(88)

246

(111)

350

(159)

537

(244)

686

(311)

789

(358)

C

1-1/2 in.

(38mm)

A

C

B

1-1/2 in.

(38mm)

Figure 4: Belt Drive
Filter Option Dimensions

Belt Drive Filter Option Dimensions

Size A B C Weight^ Filter Size Filter Quantity

70, 80, 90 537⁄8 (1368) 171⁄8 (435) 117⁄8 (302) 168 (76) 16 x 20 (406 x 508) 2

7

100 53

120 583⁄4 (1492) 191⁄8 (486) 157⁄8 (403) 194 (88) 16 x 25 (406 x 635) 2

130 (HP) 531⁄4 (1353) 211⁄8 (537) 177⁄8 (454) 197 (89) 20 x 20 (508 x 508) 2

140 (HP) 59 (1500) 231⁄8 (537) 197⁄8 (505) 231 (105) 20 x 25 (508 x 635) 2

160 (HP) 58

180 (HP) 603⁄4 (1543) 271⁄8 (689) 237⁄8 (606) 293 (133) 20 x 25 (508 x 635) 4

200 (HP) 693⁄8 (1762) 311⁄8 (791) 277⁄8 (708) 361 (164)

240 (HP) 711⁄2 (1816) 381⁄8 (968) 347⁄8 (886) 496 (225)

300 (HP) 72

360 (HP) 79

420 931⁄8 (2365) 58 (1473) 537⁄8 (1368) 1185 (538)

All dimensions in inches (millimeters) and weight is shown in pounds (kilograms).
^Weight shown is standard galvanized construction and largest cataloged open drip proof motor.
Note: 24 inch side clearance is recommended for accessing and removing filters.

⁄8 (1368) 171⁄8 (435) 137⁄8 (352) 169 (77) 16 x 20 (406 x 508) 2

3

⁄4 (1492) 261⁄8 (664) 227⁄8 (581) 285 (129) 20 x 20 (508 x 508) 4

12 x 25 (305 x 635) 3

16 x 25 (406 x 635) 3

20 x 25 (508 x 635) 4

16 x 25 (406 x 635) 4

1

⁄8 (1832) 46 (1168) 417⁄8 (1064) 759 (344) 20 x 25 (508 x 635) 8

1

⁄4 (2013) 52 (1321) 477⁄8 (1216) 957 (434)

16 x 25 (406 x 635) 10

(508 x 635) 5

20 x 25

16 x 25 (406 x 635) 5

20 x 25 (508 x 635) 10

Centrifugal Inline Fans4

A

A

A

A

C

C

C

C

F

F

E

E

Mounting

NOTE

Flex duct is recommended for mounting to the inlet
of the fan to allow for fitting adjustments. If the inlet
venturi requires adjustment, it can be detached from
the unit via the fasteners located on the inlet panel.

All fan models can be mounted horizontally, vertically
or at an angle. For ease of installation, knockouts are
provided at each location where mounting brackets
are shown in Figures 5, 6 and 7. Optional brackets are
universally adjustable to mount in any of these locations.

D

G

B

Hanging rails

D

B

B

by others

G

D

Figure 7:
Vertical Hanging or Base Mount

B

D

Mounting brackets are turned 90° for vertical mounting.
Access panels are located on the two sides adjacent to
the motor.

Direct Drive Mounting Dimensional Data

Size A B C D E F G*

60, 70

80, 90, 9513

97, 98, 99185⁄8

Figure 5:

100

Horizontal Hanging or Base Mount

120

With either a hanging or base mount the motor may
be located on either side. The base mount allows top
access panels only.

Hanging rails

by others

A

G

B

E

A

F

G

B

130 (HP)

140 (HP)

160 (HP)

Belt Drive Mounting Dimensional Data

70, 80,
90, 100

120

130 (HP)

140 (HP)

B

Figure 6:
Horizontal Hanging or Base Mount

A

B

F

E

With a hanging mount, the motor may be located on
either top or bottom. The base mount allows top motor
location only. Both options provide access panels on
two sides.

A

160 (HP)

180 (HP)

200 (HP)

240 (HP)

300 (HP)

360 (HP)

420

All dimensions in inches (millimeters).
*Hanging rails not included. Supplied by others.

5

10

(269)

1

(338)

(473)

5

18

(473)

5

18

(473)

5

18

(473)

5

19

(498)

1

23

(596)

18

(457)

18

(457)

18

(457)

19

(483)

23

(584)

25

(635)

29

(737)

31

(787)

35

(889)

3

39

(1000)

47

(1195)

⁄8

163⁄4

145⁄8

(424)

(372)

⁄4

193⁄4

151⁄8

(500)

(384)

193⁄4

151⁄8

(500)

(384)

⁄8

213⁄4

195⁄8

(551)

(499)

⁄8

233⁄4

215⁄8

(602)

(549)

⁄8

253⁄4

235⁄8

(653)

(600)

⁄8

273⁄4

255⁄8

(704)

(651)

⁄2

31

283⁄4

(789)

(730)

2113⁄16

2313⁄16

2513⁄16

2713⁄16

(554)

(605)

(656)

(707)

197⁄8

(505)

217⁄8

(556)

237⁄8

(607)

257⁄8

(657)

313⁄16

(792)

(737)

323⁄16

(817)

(762)

363⁄16

(919)

(864)

433⁄16

(1097)

(1042)

51

57

63

463⁄4

(1188)

525⁄8

(1337)

585⁄8

(1488)

(1297)

⁄8

(1449)

(1602)

29

30

34

41

87⁄8

(225)

(504)

93⁄8

197⁄8

(238)

(1093)

93⁄8

(238)

137⁄8

(352)

157⁄8

(403)

483⁄8

(1228)

433⁄4

(1112)

491⁄8

(1247)

177⁄8

(454)

(1118)

197⁄8

(505)

(1271)

227⁄8

(581)

141⁄8

(359)

161⁄8

(410)

181⁄8

(460)

491⁄2

(1257)

507⁄8

(1292)

553⁄4

(1416)

501⁄4

(1276)

201⁄8

(511)

231⁄8

(587)

241⁄8

(613)

281⁄8

(714)

351⁄8

(892)

407⁄8

463⁄4

523⁄4

(1424)

553⁄4

(1416)

573⁄4

(1467)

663⁄8

(1686)

681⁄2

(1740)

691⁄8

(1755)

765⁄8

(1948)

901⁄4

(2292)

(1038)

(1187)

(1338)

43

44

50

56

67⁄8

(176)

273⁄8

(695)

273⁄8

(695)

223⁄4

(579)

281⁄8

(715)

23

(585)

28

(713)

235⁄8

(601)

297⁄8

(758)

343⁄4

(883)

291⁄4

(743)

34

(865)

293⁄4

(756)

293⁄4

(756)

343⁄8

(873)

341⁄2

(876)

313⁄8

(797)

343⁄4

(881)

405⁄8

(1031)

See

note

See

note

Centrifugal Inline Fans 5

Duct Length

J1

The inlet and outlet duct length should be approximately
two to three wheel diameters long before and after the
fan to achieve cataloged performance.

Left Side
Discharge

Inline
Discharge

Hanging Spring Isolator

Mounting Style A

J

Hanging Neoprene Isolator

Mounting Style A Mounting Style B

Mounting Style B

K

H

J1

K

H

Height

Inlet

Width

Right Side
Discharge

Figure 8

Side Discharge

Make sure discharge is oriented in the same direction
as originally ordered, performance will change with
different discharge positions. Refer to Figure 8 for
proper side discharge definition and the Side Discharge
chart for dimensions. Consult factory for performance
corrections.

Direct Drive Side Discharge Duct Openings

Size Width Height

60, 70 97⁄8 (251) 87⁄8 (225)

80, 90, 95 127⁄8 (327) 117⁄8 (302)

97, 98, 99 137⁄8 (352) 117⁄8 (302)

100 137⁄8 (352) 137⁄8 (352)

120 157⁄8 (403) 157⁄8 (403)

130 (HP) 177⁄8 (454) 177⁄8 (454)

140 (HP) 197⁄8 (505) 197⁄8 (505)

160 (HP) 227⁄8 (581) 227⁄8 (581)

Belt Drive Side Discharge Duct Openings

70, 80, 90, 100 121⁄2 (317) 137⁄8 (352)

120 121⁄2 (317) 157⁄8 (403)

130 (HP) 121⁄2 (317) 177⁄8 (454)

140 (HP) 131⁄2 (342) 197⁄8 (505)

160 (HP) 171⁄2 (444) 227⁄8 (581)

180 (HP) 191⁄2 (494) 237⁄8 (606)

200 (HP) 231⁄2 (596) 277⁄8 (708)

240 (HP) 251⁄2 (647) 347⁄8 (886)

300 (HP) 317⁄8 (810) 417⁄8 (1064)

360 (HP) 327⁄8 (835) 377⁄8 (962)

420 347⁄8 (886) 437⁄8 (1114)

All dimensions in inches (millimeters).

J

Standing Spring Isolator

Mounting Style A Mounting Style B

5/8 inch

(16mm)

nominal

J

Standing Neoprene Isolator

Mounting Style A

J

H

Direct Drive Isolator Dimensional Data

Size H I J J1 K L

60, 70

80, 90, 95

97, 98, 99

100

120

130 (HP)

140 (HP)

160 (HP)

Belt Drive Isolator Dimensional Data

70, 80, 90

100

120

130 (HP)

140 (HP)

160 (HP)

180 (HP)

200 (HP)

240 (HP)

300 (HP)

360 (HP)

420

All dimensions in inches (millimeters).

1

(35)

1

(35)

1

(35)

1

(35)

3

⁄8

51⁄2

13⁄8

(140)

(35)

3

⁄8

51⁄2

13⁄8

(140)

(35)

3

⁄8

51⁄2

13⁄8

(140)

(35)

3

⁄8

51⁄2

13⁄8

(140)

(35)

H

63⁄4

(171)

63⁄4

(171)

63⁄4

(171)

63⁄4

(171)

J1

Mounting Style B

J1

25⁄16

(59)

25⁄8

(67)

25⁄8

(67)

25⁄8

(67)

5/8 inch

(16mm)

nominal

H

I

L

23⁄8

(60)

21⁄2

(64)

23⁄8

(60)

21⁄2

(64)

H

H

I

H

L

Centrifugal Inline Fans6

Pre Start-Up Checks

1. Check all fasteners for tightness. The wheel
should rotate freely and be aligned as shown in
Figure 9. Wheel position is preset and the unit is
tested at the factory. Movement may occur during
shipment, and realignment may be necessary.
Centering can be accomplished by loosening
the bolts holding the inlet (venturi) panel and
repositioning. Wheel and inlet cone overlap can be
adjusted by loosening the setscrews in the wheel
and moving the wheel to the desired position.

Wheel Overlap Dimensions

Size

60-95 x

97-99 x

100-160 x

70-160 x

180-240 x 3/8

300-420 x 1/2

Figure 9

Direct

Drive

Belt

Drive

G - Overlap

G

H

in. (mm)

-

1/4

1/4

1/4

H - Gap

in. (mm)

1/8

(6)

(6)

(6) -

(10)

(13)

(3)

-

-

-

3. Vibration Isolators: After fan is moved to desired
location, punch out the four knockout holes which
are located on the unit top and bottom panels.
Assemble the brackets to the unit according to
the appropriate drawings on page 6 and refer to
respective parts list on page11. Make certain all
connectors are tight and that all washers are in.

4. For Belt Drive Fans: 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; Figure 11.

CORRECT

Figure 11

WRONG

WRONG

WRONG

5. For Belt Drive Fans: Belt tension can be adjusted
by loosening four fasteners marked “R” on the drive
frame. (Refer to Figure 12). The motor plate slides on
the slotted adjusting arms. Belt tension should be
adjusted to allow 1/64 inch of deflection per inch of
belt span. For example, a 15inch belt span should
have 15/64 inch (or about 1/4 inch) of deflection with
moderate thumb pressure at mid-point between
pulleys (see Figure13). Over-tightening will cause
excessive bearing wear and noise. Too little tension
will cause slippage at start-up and uneven wear.

2. Wheel Rotation: Direction
of wheel rotation is critical.
Reversed rotation will result in
poor air performance, motor
overloading and possible
burnout. Check wheel
rotation by momentarily
energizing the unit (all direct
and belt drive fans have
clockwise wheel rotation

Figure 10

when viewed from top of fan). Rotation should be
clockwise as shown in Figure 10 and correspond
to the rotation decal on the unit. If wheel rotation is
incorrect, reverse two of the wiring leads for 3 phase
or check motor wiring for single phase. Fan rpm
should be checked and verified with a tachometer.

WARNING

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

e

s

i

w

k

c

o

l

C

Figure 12

Belt Span

Figure 13

Deflection =

R

NOTE: Identical
fasteners on
opposing side must
also be loosened.

Belt Span

64

Centrifugal Inline Fans 7

6. 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.
Any increase in speed represents a substantial
increase in the horsepower required by a unit. 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 start-up
and uneven wear.

IMPORTANT

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

Operation

1. Before starting up or operating fan, check all
fasteners for tightness. In particular, check the
setscrews in wheel hub (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, see Figure 10.

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.

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 fans only,
inspect belt alignment and tension. Adjust and tighten
as necessary.

Troubleshooting

WARNING

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

PROBLEM CAUSE CORRECTIVE ACTION

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

Center wheel on inlet, see Figure 9.

Align and tighten. See “Pre Start-Up Checks”,
on pages 7 and 8.

Remove objects, check for damage or unbalance.

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

Excessive noise
or vibration

Reduced airflow

Wheel unbalance

Bad bearings Replace.

Belts too tight or too loose Adjust tension, see Figure 12.

Wheel improperly aligned and
rubbing

Loose drive or motor pulleys

Foreign objects in wheel or
housing

System resistance too high

Unit running backwards Correct. See Wheel Rotation on page 7.

Excessive dirt buildup on wheel Clean wheel.

Improper wheel alignment Center wheel on inlet, see Pre Start-Up Checks and Figure 9.

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

AVERTISSEMENT

Centrifugal Inline Fans8

Maintenance

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 manufacturers’
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.

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 14-17.

Standard Mounting Reverse Mounting

Figure 14

Figure 15

DANGER

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

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.

IMPORTANT

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

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).

Bushing

Hub

Washers

Cap Screws

Figure 16
Standard Bushing Orientation

Hub

Bushing

Washers

Cap Screws

Figure 17
Reverse Bushing Orientation

Centrifugal Inline Fans 9

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.

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 fans 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.

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 10 ft-lbs.

Belt/Bearing Maintenance - Belt Drive

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. This may cause cords to break,
leading to premature belt failure.

4. Once installed, adjust belts as shown in

Pre-Start-Up Checks.

5. Shaft bearings can be classified in two groups:
relubricating and non-relubricating. All bearings
on standard belt drive fans are factory lubricated
and require no further lubrication under normal use
(between -20ºF and 180ºF (-29ºC and 82ºC) in a
relatively clean environment).

6. 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 overpacking or contamination.

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

8. Grease should be pumped in very slowly until a slight
bead forms around the seal. A high grade lithium
base grease should be used.

Recommended Relubrication 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 here
may be used with fan bearings.

Suggested Fan Bearing Greasing Intervals

Interval

(months)

Heavy duty in dirty, dusty locations; high

1 to 3

3 to 6

6 to 12

12 to 18

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

Infrequent operation or light duty in clean
atmosphere

Grease Manufacturers

Manufacturer Grease (NLGI #2)

Chevron U.S.A. Inc

Exxon Mobil

BP Amoco

Shell

Type of Service

Chevron SRI Grease 2

Chevron Multifak EP 2

Mobilux EP 2

Mobilith SHC 220

Mobilith AW-2

Unirex N2

Rykon Premium #2 EP

Shell Gadus S2 V220 2

Centrifugal Inline Fans10

Isolator Parts List

STANDING SUPPORT ISOLATOR HANGING SUPPORT ISOLATOR

5

7

No. Qty. Description

18

28

34

Cadmium plated
hex head bolts

Cadmium plated
hex nuts

Cadmium plated
hex head bolts

Std. mount

48

bracket with (2)
7/16 in. holes

520

612

74

84

Cadmium plated
washer

Cadmium plated
lock washer

Cadmium plated
washer

Neoprene or
Spring Isolator

2

Unit side panel

4

6

1

5

4

3

6

5

8

Direct or Belt Drive

Size 160 thru 420

1

2

6

5

5

Base fastener

by installer

Direct or Belt Drive

Size 60 thru 140

3/8 in. - 16 x 1 in. 3/8 in. - 16 x 1 1/4 in. 1 8

3/8 in. - 16 3/8 in. - 16 2 16

5/16 in. - 18 x 1 in. 3/8 in. - 16 x 1 in. 3 4

3/16 in. 1/4 in. 4 4

7/8 in. O.D. x
3/8 in. I.D. x 1/16 in.

7/8 in. O.D. x
3/8 in. I.D. x 1/16 in.

3/8 in. 3/8 in. 6 12

1 3/8 in. O.D. x
9/16 in. I.D. x
3/32 in.

1 3/8 in. O.D. x
9/16 in. I.D. x
3/32 in.

Reference appropriate table below for
replacement Isolator(s)

NOTE: Top bracket
is reversible for
mounting unit 90º
from indicated.

1

5

7

5

6

2

3

4

2

No. Qty. Description

Cadmium plated
hex head bolts

Cadmium plated
hex nuts

Std. mount
bracket with (1)
1/4 in. hole

Std. mount
bracket with (2)
7/16 in. holes

524

Cadmium plated
washer

Cadmium plated
lock washer

712

84

Cadmium plated
washer

Neoprene or
Spring Isolator

2

5

6

5

Unit side panel

Direct or Belt Drive

Size 60 thru 140

5

7

8

7

1

5

6

2

Direct or Belt Drive

Size 160 thru 420

3/8 in. - 16 x 1 in. 3/8 in. - 16 x 1 1/4 in.

3/8 in. - 16 3/8 in. - 16

3/16 in. 1/4 in.

3/16 in. 1/4 in.

7/8 in. O.D. x
3/8 in. I.D. x 1/16 in.

7/8 in. O.D. x
3/8 in. I.D. x 1/16 in.

3/8 in. 3/8 in.

1 3/8 in. O.D. x
9/16 in. I.D. x
3/32 in.

1 3/8 in. O.D. x
9/16 in. I.D. x
3/32 in.

Reference appropriate table below for
replacement Isolator(s)

Replacement Spring Isolator(s)

Model Fan Size

Belt Drive — 70-130 140-200 240-300 360-420

Direct Drive 60-100 120-140 160 — —

Base Mount

Hanging

FDS-1-35

BLUE

SH-1-35

BLUE

FDS-1-70

GREEN

SH-1-70

GREEN

FDS-1-120

GRAY

SH-1-125

GRAY

FDS-1-220

BROWN

SH-1-245

BROWN

FDS-1-370

ORANGE

SH-1-370

ORANGE

Replacement Neoprene Isolator(s)

Model Fan Size

Belt Drive 70-140 160-200 240-420

Direct Drive 60-140 160 —

Base Mount R-1 GREEN R-2 BLACK R-2 RED

Hanging 40DUR BLACK 50DUR BLACK 50DUR BLACK

Centrifugal Inline Fans 11

Parts List

Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information will
assist the local Accurex 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.

CAUTION

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

MOTOR

Direct Drive Centrifugal
Inline Exhaust Fan

Belt Drive Centrifugal
Inline Exhaust Fan

VENTURI

HOUSING

WHEEL

HOUSING

BEARING
SUPPORT

COVER

MOTOR

ATTENTION

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

ACCESS
PANEL

MOTOR

MOTOR
PULLEY

BELT

BELT
TUBE

SHAFT
PULLEY

VENTURI
PANEL

MOTOR
SUPPORT
ANGLES

MOTOR
PLATE

WHEEL

ACCESS
PANEL

MOTOR
COVER

MOTOR

MOTOR
PULLEY

BELT

BELT
TUBE

BEARING
COVER

Our Commitment

Our Commitment

VENTURI

WHEEL

SHAFT BEARINGS BEARING

COVER

ACCESS
DOOR

VENTURI PANEL

WHEEL

ACCESS
DOOR

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

479990 • XID XIB, Rev. 6, January 2019 © 2019 Accurex, LLC12