Greenheck Centrifugal (CSW, BIDW, AFDW), Industrial (IPA, IPO, IPW) and Filtered Supply (LSF) (463687) - Manual (Page 4)

4 Centrifugal, Industrial and Filtered Supply
Upblast Discharge
40 in.**
Weatherhood
** Per NFPA 96 the fan discharge
must be a minimum of 40 inches
(1016 mm) above the roof surface.
Duct
from
Kitchen
Hood
18 in.*
* Per NFPA 96 the duct must be
all welded construction to a
minimum distance of 18 in.
(457 mm) above the roof surface
1016 mm
457 mm
Outdoor Installation for UL/cUL 762 Listed Fans
for Restaurant Exhaust
The UL/cUL 762 listing for restaurant exhaust is
available on the CSW models. Fans are listed for a
maximum operating temperature of 400°F (204°C) and
include a bolted access door and 1 inch (25 mm) drain
connection. An outlet guard is strongly recommended
when the fan discharge is accessible. An upblast
discharge is recommended. The fan discharge must
be a minimum of 40 inches (1016 mm) above the
roof line and the exhaust duct must be fully welded
to a distance of 18 inches (457 mm) above the roof
surface.
The drawing below is for dimensional information
only. See the latest edition of NFPA 96 Standard for
Ventilation Control and Fire Protection of Commercial
Cooking Operations for detailed installation
instructions, materials, duct connections and
clearances.
CAUTION
When installing a fan, ensure the proper protective
devices are used to protect personnel from
moving parts and other hazards. A complete
line of protective accessories are available from
Greenheck including: inlet guards, outlet guards,
belt guards, shaft guards, protective cages and
electrical disconnects.
Electrical Disconnects
All fan motors should have disconnects located in
close visual proximity to turn off electrical service.
Service disconnects shall be locked out when
maintenance is being performed.
Moving Parts
All moving parts must have guards to protect
personnel. Refer to local codes for requirements
as to the number, type and design. Fully secure fan
wheel before performing any maintenance. The fan
wheel may start “free wheeling” even if all electrical
power has been disconnected. Before the initial
start-up or any restart, check the guards (belt,
shaft, inlet and outlet) and check the access doors
to ensure that they are installed and secure.
NOTE
The drain connection, if supplied, will move if the
fan scroll is rotated.
Rotatable Housings
It may be necessary to rotate the scroll of the fan
to achieve a different discharge position than what
was originally supplied. Centrifugal fans models
CSW, (sizes 7 - 30, arr. 1, 4, 8, 9, and 10, class I and
II) and Industrial Process fans (sizes 5–19, standard
and heavy duty) have the flexibility to be rotated
in the field. This is accomplished by removing the
housing bolts, rotating the housing to a new discharge
position, and reinstalling the bolts.
Bases (Foundation and Isolation)
Critical to every fan installation is a strong, level
foundation. A reinforced poured concrete pad with
a structural steel base or inertia base provides an
excellent foundation. Structural bases must be sturdy
enough, with welded construction, to prevent flexing
and vibration.
To eliminate vibration and noise from being transferred
to the building, vibration isolators should be used. The
fan is mounted directly on the isolation base and must
be supported for the entire length of the fan base
angle (Refer to the installation manual for structural
bases if the base was supplied by Greenheck).
Isolators are installed between the isolation base and
the foundation.
After the fan, isolation base, and isolators are
installed, the entire assembly must be leveled.
Position the
level on the
isolation
base, not the
fan shaft, for
proper leveling.
Additionally,
the motor and
fan shafts must
be level and
parallel relative
to each other
for proper
alignment.
Typical Fan on Isolation Base