FumeJet
®
Fume Exhaust Fans
5
®
Installation
Move the fan to the desired location. Check and tighten
fasteners throughout the unit and then fasten securely
through mounting holes provided in the base angles.
The unit must be set level (shimming may be necessary).
Flexible duct connections and vibration isolators should
be used where noise is a factor.
The motor voltage and ampere rating must be checked
for compatibility with the electrical supply prior to final
electrical connection. Supply wiring to the fan must
be properly fused, and conform to local and national
electrical codes.
CAUTION
When installing a fan, ensure the proper protective
devices are used to protect personnel from moving
parts and other hazards.
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 (motor cover and
weatherhood) and check the access doors to ensure
that they are installed and secure.
Ducted Outlet Installations
Discharge Duct Turns
- Duct turns located near the
fan discharge should always be in the direction of the
fan rotation.
Fan performance is reduced when duct turns are
made immediately off the fan discharge.
To achieve cataloged fan performance
there should be at least
three equivalent
duct diameters of
straight ductwork
between the fan
discharge and
any duct turns.
Rotat
io
n
R
ot
ati
on
R
ot
ati
on
Rotat
io
n
Turning
Vanes
Turning
Vanes
POOR
POOR
GOOD
POOR
GOOD
Length of Straight Duct
GOOD
Three fan wheel diameters
One fan
wheel
diameter
3/4 to
one fan
wheel
diameter
One fan
diameter
3/4 to
one fan
wheel
diameter
SYSTEM EFFECT FACTORS CURVES
ST
ATIC PRESSURE LOS
S
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
5
10
15
20
25
30
35
40
45
FPM X 100
OUTLET VELOCITY
CUR
VE
1
CUR
VE
2
CUR
VE
3
CUR
VE 4
Free Discharge
- Free or abrupt discharge into a
plenum results in a reduction in fan performance. The
effect of discharge static regain is not realized.
Rotat
io
n
R
ot
ati
on
R
ot
ati
on
Rotat
io
n
Turning
Vanes
Turning
Vanes
POOR
POOR
GOOD
POOR
GOOD
Length of Straight Duct
GOOD
Three fan wheel diameters
One fan
wheel
diameter
3/4 to
one fan
wheel
diameter
One fan
diameter
3/4 to
one fan
wheel
diameter
SYSTEM EFFECT FACTORS CURVES
ST
ATIC PRESSURE LOS
S
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
5
10
15
20
25
30
35
40
45
FPM X 100
OUTLET VELOCITY
CUR
VE
1
CUR
VE
2
CUR
VE
3
CUR
VE 4
