Fume Exhaust Fans
8
Stack Installation
NOTE
Fans should never be lifted by the shaft, motor, motor
cover or accessories.
NOTE
When provided with isolators, Venco supplies
information identifying isolator location and separate
installation instructions.
Curb Cap with Inlet Box
- Connecting primary inlet
exhaust air duct is allowed through the curb cap and
inlet box. Bottom inlet connection is by others and
should be made by attaching the duct drop to the inside
panel edge of the curb cap and duct support. Duct
connection is to be sealed from air leakage and water
penetration.
Duct Support
- Adjustable spacer bar is used for
the installation of the duct drop. Duct support will be
supplied with roof curb from Venco or by others.
Equipment Supports
Model GESS equipment supports are designed for use
on flat roof decks, to be mounted directly to the roof
deck structure, then roofed and flashed for weather
tightness. The orientation of the equipment support
should run perpendicular to the fan shaft.
Duct Drop and Connection
by others
Duct Spacing
VJC-200 VJC-300
VJI
Duct Support
inches
(mm)
206
306
11
(279)
207
307
7
208
308
8
9
10
212
312
12
12
(305)
215
315
15
14
(356)
18
17
(432)
20
18
(457)
24
21
(553)
Remove flange collar from fan outlet and discard. Slip
stack end with prepunched holes down over outlet
opening, fasten with twelve #12 sheet metal screws
or equivalent.
1. Remove the outlet flange collar
and save the screws. Discard
outlet collar pieces.
2. Slip-fit stack over the fan outlet
with prepunched holes at the
bottom of the stack.
3. Align holes in stack with holes
on the fan outlet and fasten
with the twelve (12) sheet metal
screws.
4. Seal all stack field connections
with application appropriate
sealant or tape.
1
2
3
4
4
