FloAire Non-Welded Grease Duct Systems - Manual (Page 14)

14
Grease Duct Assembly Examples
Fig. 10 - Grease Duct Installation Guide
Grease Duct Installation:
The illustration shown provides useful information
on the installation of grease duct systems. Each
installation is specific to the application and the job
site. When duct systems are installed outside,
welded seams must be painted with corrosion
resistant high temperature paint. If you encounter a
situation not covered by this illustration, refer to the
guide or consult the factory. Remember, if the
distance to a combustible surface is less than 18
INCHES you will need to wrap the duct in a listed
duct
wrap to get “ZERO CLEARANCE TO
COMBUSTIBLES”.
Adjustable ducts and standard
ducts can be used to terminate
at the transition plate. The duct
is fully welded to the transition
plate at the factory.
Standard duct
Fan adapter plate
with ceramic gasket
First vertical support
at joint #1 after change
in direction
Tee - Access door
45 degree elbow
3/8" Threaded Rod
Minimum.
Adapter
Offset collar used to
pictch horizontal duct runs
The vertical support assembly is
designed for 2" to 18" clearance
from duct to non-combustable
surface.
This duct is designed to be installed
in application where the duct system
is a minimum of 18" to combustible
surfaces, duct installations that cannot
maintain 18" minimum clearance to a
combustible surface must be insulated
using a clearance reducing, listed grease duct
insulation, see details in this guide.
Adjustable duct
Adustable
collar
Riser
See table 2
Offset collar
Tee assembly with access door
has been used due to offset in
the duct. Access doors are used
when there is a change in direction
or where areas of duct are not accessible.
IMPORTANT INFORMATION
PLEASE READ BEFORE INSTALLING
See table 3
Adjustable duct
Adustable
collar
Y Tee
Standard duct
Riser
Standard duct
Tee - Access door
Offset collar
Adjustable ducts are used
on runs over 100 ft to compensate
for thermal expansion. The duct will
grow approximately 1" per 100 ft of
duct length for each 100 °F exhaust vapor
temperature above the surrounding air temperature.
Standard duct
Adustable
collar
Adjustable duct
Vented curb per NFPA-96
Exhaust fan
Offset collar
Unistrut / Angle