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Centrifugal Inline Fans
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Document 483064
Models SQ-M and BSQ-M
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.
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.
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.
Model SQ-M Direct Drive
Model SQ-M is a direct drive
centrifugal inline exhaust fan. These
fans are specifically designed for inline
applications. Performance capabilities
range up to 8,500 m
3
/hr
(5,000 cfm)
and up to 498 Pa
(2.0 in. wg)
of static
pressure. SQ-M fans are available
in eight sizes with nominal wheel
diameter ranging from 211 to 406 mm
(8 to 16 inches)
(70 to 160 unit sizes). Each fan shall
bear a permanently affixed manufacturers engraved
metal nameplate containing the model number and
individual serial number.
Model BSQ-M Belt Drive
Model BSQ-M is a belt drive
centrifugal inline exhaust fan. These
fans are specifically designed for inline
applications. Performance capabilities
range up to 46,200 m
3
/hr
(27,200 cfm)
and up to 996 Pa
(4.0 in. wg)
of static
pressure. BSQ-M fans are available in
twenty-two sizes with nominal wheel
diameter ranging from 284 to 1067 mm
(11 to 42 inches)
(70 to 420 unit sizes), including High
Pressure (HP). Each fan shall bear a permanently affixed
manufacturers engraved metal nameplate containing the
model number and individual serial number.
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.
Table of Contents
Receiving, Unpacking, Handling, Storage . . . . . . . 2
Inspection and Maintenance During Storage . . . . . 2
Removing from Storage . . . . . . . . . . . . . . . . . . . . . 2
Dimensional Data SQ-M/BSQ-M . . . . . . . . . . . . . . 3
Mounting SQ-M/BSQ-M . . . . . . . . . . . . . . . . . . . . . 4
Isolator & Discharge Information SQ-M/BSQ-M . . . 5
Pre-Starting Checks . . . . . . . . . . . . . . . . . . . . . . . . 6
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recommended Bearing Lubrication . . . . . . . . . . . 8
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Our Commitment . . . . . . . . . . . . . . . . . . . . . . . . . . 12
