PROPELLER UPBLAST IO&M
B51071-005
4
Fan Installation
The fan support (roof curb) should provide a level surface
for installation. If the roof is pitched more than 1/2:12, a sloped
curb must be used to correct for the incline. If the unit is in-
stalled on a non-level surface, the damper door pivot should
be positioned perpendicular to the peak of the roof. Consult
factory for additional details.
• Place fan over roof opening
•
Secure the fan with lag screws, anchor bolts, or other suit
-
able fasteners
Final Installation Steps
1.
Inspect fasteners and setscrews, particularly fan mount
-
ing and bearing fasteners, and tighten according to the
recommended torque shown in the table,
Recommended
Torque for Setscrews/Bolts
.
2. Inspect for correct voltage with voltmeter.
3. Ensure all accessories are installed.
4. Test the fan to be sure the rotation is the same as indicat-
ed by the arrow marked
Rotation
.
Do not allow the fan to run in the wrong direction. This
will overheat the motor and cause serious damage.
For 3-phase motors, if the fan is running in the wrong
direction, check the control switch. It is possible to
interchange two leads at this location so that the fan is
operating in the correct direction.
Smoke Control Units Additional Installation Steps
The damper actuator arms are safety bolted at the factory
to prevent damage or personnel injury during handling and in-
stallation. The bolt must be removed for the damper actuator
to operate correctly. Refer to
Figure 4
.
• Remove Bolt “A” from each of the damper arms
• Be sure that linkage hook “B” is in contact with bolt “C” to
prevent excessive load on the fusible link
The damper arms will not operate unless this bolt is re-
moved. This bolt should be replaced before any maintenance
or repair work is started.
Bolt C
Linkage
Bolt A
Figure 4 - Safety Bolt Removal
Hook B
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power sources.
Inspect fasteners and setscrews, particularly those used
for mounting the unit, and tighten if necessary.
2.
Inspect belt tension and pulley alignment. (Remember, if belt
tension is correct, a loud squeal occurs as the fan increases
to full power.)
3. Inspect motor wiring.
4. Ensure the belt touches only the pulleys.
5.
Rotate the propeller to ensure it does not rub against the
base.
6. Ensure fan and ductwork are clean and free of debris.
7. Test the fan to ensure the rotation of the propeller is the
same as indicated by the rotation label.
8. Close and secure all access doors.
9. Restore power to unit.
Recommended Torque for Setscrews/Bolts (IN-LB)
Setscrews
Hold Down Bolts
Size
Key Hex
Across
Flats
Recommended
Torque
Size
Recommended
Torque
Min.
Max.
#8
5/64”
15
21
3/8”-16
324
#10
3/32”
27
33
1/2”-13
780
1/4
1/8”
70
80
5/8”-11
1440
5/16
5/32”
140
160
3/4”-10
2400
3/8
3/16”
250
290
7/8”-9
1920
7/16
7/32”
355
405
1”-8
2700
1/2
1/4”
560
640
1-1/8”-7
4200
5/8
5/16”
1120
1280
1-1/4”-7
6000
3/4
3/8”
1680
1920
-
-
7/8
1/2”
4200
4800
-
-
1
9/16”
5600
6400
-
-
Start Up
Turn the fan on. In variable speed units, set the fan to its
lowest speed. Inspect for the following:
• Direction of rotation
• Excessive vibration
• Unusual noise
• Bearing noise
• Improper belt alignment or tension (listen for a continuous
squealing noise)
• Improper motor amperage or voltage
If a problem is discovered, immediately shut off the
fan. Lock out all electrical power and check for the
cause of the trouble. Refer to Troubleshooting.
Inspection
Inspection of the fan should be conducted at the first
30-minute
,
8-hour
and
24-hour
intervals of satisfactory op-
eration. During the inspections, stop the fan and inspect as
per the information below.
30-Minute Interval:
Inspect bolts, setscrews, and motor mounting bolts. Adjust
and tighten as necessary.
8-Hour Interval
Inspect belt alignment and tension. Adjust and tighten as
necessary.
24-Hour Interval
Inspect belt tension. Adjust and tighten as necessary.
Maintenance
Establish a schedule for inspecting all parts of the fan. The
frequency of inspection depends on the operating conditions
and location of the fan.
Inspect fans exhausting corrosive or contaminated air within
the first month of operation. Fans exhausting contaminated air
(airborne abrasives) should be inspected every three months.
Clean the propeller and air inlets if material build-up is exces-
sive. Excessive build-up can cause imbalance and failure of
the propeller.
