Acer 471558 - Manual

1

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 m

3

/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 m

3

/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.