Aerovent IM-160 - Manual (Page 2)

2 Aerovent IM-160
SPINNER
FACTORY ADJUSTED
BLADES
CAPSCREW (3 REQ'D.)
SPINNER
BUSHING
SETSCREW
(7 REQ'D.)
HUB
BLADE
(7 REQ'D.)
The blade angle of the adjustable pitch Type W vane-
axial wheel has been set at the factory to deliver a
particular performance. However, the performance of
the fan can be changed by adjusting the blade to a
different angle, either higher or lower, depending on
the volume of air required. Blades may be adjusted
for low angles without concern of overloading motors.
When adjusting to higher angle settings, check motor
current to be sure the motor is not overloaded. Keep
motor current within nameplate and service factor
ratings. See Catalog 456 for Type W vaneaxial fan
performance data.
Type W - Adjustable Pitch Wheel
W7 Adjustable Pitch Wheel
BUSHING
DIAMETER
LENGTH TORQUE
NO. (IN.) FT. LBS.
H 1 ⁄ 4 -20 1 1 ⁄ 4 7 1 ⁄ 2
P-1 5 ⁄
16
-18 1 1 ⁄
2
13
P-2 5 ⁄ 16 -18 1 3 ⁄ 4 13
Q-2 3 ⁄
8
-16 2 1 ⁄
2
24
R-2 3 ⁄
8
-16 3 24
Bushing Bolt Torque Values
SETSCREW TORQUE (FT.-LB.)
SIZE SOCKET HEAD SQUARE HEAD
5/16 14 18
3/8 16 24
1/2 34 45
5/8 64 85
Setscrew Torque Values
The blades are held in place by a high strength
specially designed steel bolt cast into the blade and
threaded into the hub. It is locked by one setscrew.
There is a scale on the hub which indicates the posi-
tion in degrees. An index mark needs to be made on
the blade before adjusting.
To change the angle, simply loosen the setscrew
with an Allen wrench, adjust the index mark on the
blade to the proper angle setting on the scale on
the hub and tighten. The angle cannot be thrown off
once the locking setscrew is tightened. When increas-
ing the angle, turn the propeller by hand to check tip
clearance before startup.
FAN
ACCESS DOOR
(OPTIONAL) VANE
SECTION
AIRFLOW
Belt Driven – Type T
The guide vanes are built into a removable section
of duct adjacent to the propeller and can be taken
completely out for cleaning without disturbing the fan.
Removing the vane section also provides access to
the cast solid aluminum propeller. The construction of
this fan lends itself to high temperature or corrosive
applications. As an alternative, an optional access
door can be provided in the fan housing for inspec-
tion and cleaning of the propeller. Type T Belt Driven & Type B High Temperature