Greenheck CUE/CUBE (471560) - Manual (Page 5)

5 Upblast Centrifugal Roof Exhaust Fans
WARNING
Minimum duct velocities must be maintained in
kitchen exhaust applications. If a speed controller is
used, ensure compliance with all applicable codes.
General Ventilation Installation
Fig. 5 - Typical Roof Mounting Installation
8 or 12 in. min.
(203 or 305 mm)
Recommended
Roof Opening
1 1 1 /
4 in.
Recommended
Duct and
Damper Size
Wiring by
Others
Factory Wired
Motor to
Disconnect
Roof Deck
Damper
1 /
4 in.
Screw Screw
Conduit
Chase
(32 mm) (32 mm)
3/4 in.
(19 mm)
Commercial Kitchen Installation
Fig. 6 - Typical Roof Mounting Installation
Liquid Tight
Flexible Conduit
by Others
Recommended
Roof Opening
Roof Deck
Minimum 40 in.
(1016 mm)
Discharge Height
(per NFPA)
8 in. min.
(203 mm)
Screw Screw
Optional
NEMA 3R
Disconnect
factory wired
from motor to
disconnect
through the
breather tube
Welded Duct
by others
minimum of
18 in. (457
mm) above
roof deck
(per NFPA)
Optional
Vented Curb
Extension
Optional
Grease
Trap
Kitchen Roof Mounting Installation
1. The size of the duct must be equal or larger than inlet
opening.
2. Secure the fan to curb at all four corners using a
minimum eight anchor bolts, lag screws or other
suitable fasteners.
3. Area codes may require a continuous weld between
duct and inlet.
4. To comply with NFPA 96 the fan discharge has to be a
minimum 40 in. (1016 mm) above the roof surface
and a minimum of 10 ft. (3048 mm) from any building
air intake.
5. Ductwork to an upblast discharge exhaust fan is
constructed of carbon steel not less than 16 MSG
(1.6 mm) and extend a minimum of 18 in. (457 mm)
above the roof surface.
6. Ensure that a minimum of 500 ft/min of air velocity
through the fan is maintained per NFPA 96,
clause 8.2.1.1, 2008 edition and UL 762, Issue #5,
December 19, 2003, clause 6.2.
7. The following accessories may be required by
NFPA-96 depending upon installation; Grease Trap,
Hinge Kit or Hinged Base, Clean-out Port, and
Vented Curb.
IMPORTANT
Power
Ventilator
Restaurant
Exhaust
Appliances
13G3
Maximum
Operating
Temperature
400˚F
ELECTRICAL - If fan motor is NOT thermally protected,
remote overload protection must be installed having
adequate rating as to voltage, frequency, horsepower, and
full load current per phase. Where connected to a circuit
protected by fuses, use time delay fuses. For supply
connection use wires rated for at least 194˚F (90˚C).
INSTALLATION - When connecting electrical power to this
fan, do not restrict motor movement for possible future belt
or wheel adjustment.
Must be installed in accordance with the requirements of
MFPA 96 or must have minimum clearances of zero inches
to non-combustibles, 3 inches to limited combustibles,
18 inches to combustibles.
CAUTION - Mount with the lowest moving part at least
8 ft (2.5m) above floor or grade level. Not required on roof
mounted ventilators or duct mounted ventilators provided
with belt guards.
®