Acer 471558 User's Manual

Acer Grill User's Manual - 471558.
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Model G/GB Centrifugal Roof Exhaust Fans

Installation, Operation and Maintenance Manual

Please read and save these instructions. 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 instructions 
could result in personal injury and/or property damage! Retain instructions for future reference.

®

PN 471558

Downblast Centrifugal Roof Exhaust Fans

Model G

Direct Drive
Model G is a direct drive downblast 
centrifugal exhaust fan. These 
fans are specifically designed 
for roof mounted applications 
exhausting relatively clean air. 
Performance capabilities range 
up to 4,300 cfm (7,305 m3/hr) and 
up  to  1 in. wg  (249 Pa) of static 
pressure. The maximum continuous 
operating temperature is 180°F 
(82ºC)

. G 

models are available 

in 27 sizes with nominal wheel 
diameter ranging from 8 to 24 inches (203 to 610 mm) 
(060 - 243 unit sizes). Each fan shall bear a permanently 
affixed manufacturer’s engraved metal nameplate 
containing the model number and individual serial 
number. All fans are UL/cUL listed Standard 705.

  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.

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 are 
present. If more information is needed, contact a licensed 
professional engineer before moving forward.

Model GB

Belt Drive
GB Model Fans are belt drive 
downblast centrifugal exhaust fans. 
These fans are specifically designed 
for roof mounted applications 
exhausting relatively clean air. 
Performance capabilities range up 
to 44,700 cfm (75,950 m3/hr) and 
up  to  2.5 in. wg  (623 Pa) of static 
pressure. The maximum continuous 
operating temperature is 180°F 
(82ºC)

. GB models are available in 

twenty sizes with nominal wheel 

diameters ranging from 11 to 54 inches (279 to 1372 mm) 
(071-540 unit sizes). Each fan shall bear a permanently 
affixed manufacturer’s nameplate containing the model 
number and individual serial number. All fans are 

 

UL/cUL listed Standard 705.

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