background image

Centrifugal Inline Fans

8

®

Maintenance: SQ-M / BSQ-M

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 for model BSQ-M. Motor cleaning should be 
limited to exterior surfaces only. Removing dust buildup 
on the 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.

DANGER

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

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).

Torque Specifications for Bushings

Refer to the torque values imprinted on the hub as 
shown in Figure 12 for torque specifications. If there is 
no torque value on the hub, refer to the table below.

Belt/Bearing Maintenance BSQ-M Unit

  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: 

permanent lubricated and re-lubricating bearings. 
All bearings on standard model SQ-M fans are 
permanent lubricated bearings and require no 
further lubrication under normal temperature use. 

  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.

Figure 12

Torque Values For 

SQ-M & BSQ-M

Set Screw

Torque

M8

11.3 Nm

M10

25.4 Nm

Summary of Contents for BSQ-M 100

Page 1: ...erify 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 exhaus...

Page 2: ...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...

Page 3: ...886 347 8 762 30 508 20 406 16 0 1192 x CFM 159 350 18 ga 889 x 889 35 x 35 300 300HP 1168 46 965 38 1168 46 1064 417 8 864 34 559 22 457 18 0 0826 x CFM 244 537 16 ga 1067 x 1067 42 x 42 360 360HP 13...

Page 4: ...ss panels are located on the two sides adjacent to the motor Figure 5 Vertical Hanging or Base Mount G B B D D Hanging rails by others Mounting Dimensional Data Model A B C D G SQ M 70 270 105 8 432 1...

Page 5: ...8 BSQ M 160 420 35 13 8 35 13 8 64 2 Spring Base Isolators Model H J J1 L I K SQ M 70 90 38 1 51 2 70 2 152 6 SQ M 100 160 35 13 8 51 2 150 515 16 BSQ M 70 140 35 13 8 35 13 8 60 23 8 150 515 16 BSQ...

Page 6: ...itical Reversed rotation will result in poor air performance motor overloading and possible burnout Check wheel rotation by momentarily energizing the unit all SQ M and BSQ M fans have clockwise wheel...

Page 7: ...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 8 4 When the fan is star...

Page 8: ...dition 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 Torque Speci cations for Bushings Ref...

Page 9: ...y duty in dirty dusty locations high ambient temperatures moisture laden atmosphere vibration 3 to 6 12 to 24 hours per day heavy duty or if moisture is present 6 to 12 8 to 16 hours per day in clean...

Page 10: ...l Inline Exhaust Fan VENTURI WHEEL ACCESS PANEL HOUSING VENTURI PANEL WHEEL MOTOR COVER MOTOR MOTOR COVER MOTOR ACCESS PANEL BSQ M Belt Drive Centrifugal Inline Exhaust Fan Parts List Each fan bears a...

Page 11: ...tighten See Pre Start Up Checks pages 6 7 Foreign objects in wheel or housing Remove objects check for damage or unbalance Reduced air ow System resistance too high Check system Proper operation of ba...

Page 12: ...ct area tab and in the Technical Data Library Greenheck s Centrifugal Inline Fans catalog Models SQ M and BSQ M provides additional information describing the equipment fan performance available acces...

Reviews: