Loren Cook AQB24 Installation Manual
AQ/SEP/ETE/ETS
Propeller Roof Fans
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains the installation, operation
and maintenance procedures for standard units of the
AQ/SEP/ETE/ETS - Propeller Roof Fans.
Carefully read this publication prior to any installa-
tion or maintenance procedure.
Loren Cook catalog,
tional information describing the equipment, fan performance, available accessories and specification data.
For additional safety information, refer to AMCA publication 410-96,
Industrial and Commercial Fans
All of the publications listed above can be obtained from
Loren Cook Company by phoning 417/869-6474, extension
166; by FAX at 417/832-9431; or by e-mail at info@lorencook.com.
For information and instructions on special equipment,
contact Loren Cook Company at 417/869-6474.
Safety Practices for Users and Installers of
Propeller Roof Fans
.
, provides addi-
Receiving and Inspection
Carefully inspect the fan and accessories for any damage
and shortage immediately upon receipt of the fan.
• Turn the propeller by hand to ensure it turns freely and
does not bind.
• Check dampers (if included) for free operation of all
moving parts.
• Record on the
damage.
Delivery Receipt
any visible sign of
Handling
Lift the fan by the base or by the shipping carton. Never
lift by the shaft, motor or housing.
If your fan is covered with a protective coating (e.g., phe-
nolic enamels, or other protective coatings), handle with
extreme care . Even a small chip will break the coating’s
continuity and destroy its ability to protect the metal.
Propellers are carefully balanced to give smooth, vibration-free operation. If the propeller is damaged during handling, it will require rebalancing.
WARNING
This unit has rotating parts. Safety precautions
should be exercised at all times during installation,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.
To maintain good working condition of the fan when it is
stored outdoors or at a construction site, follow the additional instructions below.
• Coat the shaft and bearings with grease or rust preventative compound to help seal out moisture.
• Periodically rotate the propeller and operate the dampers (if supplied) to keep a coating of grease on all internal bearing parts.
• Periodically inspect the fan to prevent damaging conditions.
• Block propeller to prevent natural rotation.
• Cover the unit with some type of weather cover to prevent moisture, corrosion, dirt or dust accumulation.
Personal Safety
Disconnect switches are recommended. Place
the disconnect switch near the fan in order that
the power can be swiftly cut off in case of an
emergency, and in order that maintenance personnel are provided complete control of the
power source.
Installation
Damper Installation
If your fan is supplied with dampers, follow the directions
below. If your fan does not include dampers, proceed to
Motor Installation
a. Place the damper inside the curb. Ensure the damper
will open freely for the correct direction of the airflow.
b. Secure to curb at the damper shelf by installing at least
two sheet metal screws (#10 x 1/2”) on each side of the
damper, through the tray, with the screw head catching
the flange on the damper. This will prevent the exhaust
dampers from lifting and keep the supply dampers centered.
Damper Installation continued
.
Storage
If the fan is stored for any length of time prior to installation, store it in its original shipping crate and protect it from
dust, debris and the weather.
Outdoor Storage
SEP/AQD
1
.
c. Drill a hole in the curb shelf for conduit needed for
motor wiring.
d. Operate the dampers manually to ensure the blades
move freely. Dampers should be released from full
open position to check for proper closing.
1/4 inch
1 foot
Figure 1
Motor Installation (Belt Drive fans)
To prevent damage to the fan during shipping, motors 5
HP and larger, and extremely heavy motors (cast iron or
severe duty) are shipped loose and must be field mounted.
a. Remove the motor plate mounting bolts and the motor
plate.
b. Remove the motor mounting bolts from the motor
plate.
c. Mount the motor to the motor plate aligning to the
appropriate holes.
d. Place the motor plate on the power assembly and rein-
stall the mounting bolts.
Correct
Incorrect
c. Lock the motor plate adjustment nuts
in place.
d. Ensure pulleys are properly aligned.
Refer to
Figure 2
Pulley Alignment
Pulley alignment is adjusted by loosening the motor pulley setscrew and by
moving the motor pulley on the motor
shaft or by moving the entire motor along
the motor mounting bracket.
Figure 2
illustrates correct and incorrect pulley alignment.
Figure 3
A recommended method of inspecting the pulley alignment
is shown in
Figure 3
. With the shorter leg of a carpenter’s
square or other straight edge lying along the case of the
motor, adjust the position of the motor pulley (or the motor)
until the longer leg of the square is parallel to the belt.
Wiring Installation
All wiring should be in accordance with local ordinances
and the National Electrical Code, NFPA 70. Ensure the
power supply (voltage, frequency, and current carrying
capacity of wires) is in accordance with the motor nameplate. Refer to the
Wiring Diagrams
on page 3.
Lock off all power sources before unit is wired to power
source.
Leave enough slack in the wiring to allow for motor move-
ment when adjusting belt tension.
Personal Safety
Disconnect switches are recommended. Place the
disconnect switch near the fan in order that the
power can be swiftly cut off in case of an emergency, and in order that maintenance personnel are
provided complete control of the power source.
Incorrect Incorrect
Figure 2
Belt and Pulley Installation
If your fan is a direct drive, proceed to
Wiring Installation
Belt tension is determined by the sound of the belts when
the fan is first started. The belts will produce a loud squeal,
which dissipates after the fan is operating at full capacity. If
belt tension is too tight or too loose, lost efficiency and
damage can occur.
Do not change the pulley pitch diameter to change tension. The change will result in a different fan speed.
a. Loosen the motor plate adjustment nuts on motor base
and move motor plate in order that the belts can easily
slip into the grooves on the pulleys. Never pry, roll, or
force the belts over the rim of the pulley.
b. Adjust the motor plate until proper tension is reached.
For proper tension, a deflection of approximately 1/4”
per foot of center distance should be obtained by firmly
pressing the belt. Refer to
Figure 1
.
Follow the wiring diagram in the disconnect switch
and the wiring diagram provided with the motor. Correctly label the circuit on the main power box and
always identify a closed switch to promote safety (i.e.,
red tape over a closed switch).
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.
.
Place fan over roof opening. Secure the fan with lag
screws, anchor bolts, or other suitable fasteners.
Recommended Torque for Setscrews/Bolts (IN/LB.)
Setscrews
Size
No.10 3/32” 28 33 3/8”-16 240
1/4” 1/8” 66 80 1/2”-13 600
5/16” 5/32” 126 156 5/8”-11 1200
3/8” 3/16” 228 275 3/4”-10 2100
7/16” 7/32” 348 384 7/8”-9 2040
1/2” 1/4” 504 600 1”-8 3000
5/8” 5/16” 1104 1200 1-1/8”-7 4200
3/4” 3/8” 1440 1800 1-1/4”-7 6000
2
Key Hex
Across
Flats
Recommended
Torque
Min. Max. Size
Hold Down Bolts
Wrench
Torque
Wiring Diagrams
Single Speed, Single Phase Motor
Ground A
L
T- 1
T- 4
Ground B
When ground is required, attach to ground A or B with no. 6 thread forming
screw. To reverse, interchange T-1 and T-4.
1
Line
L
2
Wiring Diagrams
3 Phase, 9 Lead Motor
Low Voltage
208/230 Volts
4
6
5
3
1
9
728
L2L
L
3
To reverse, interchange any 2 line leads.
1
High Voltage
2 Speed, 2 Winding, Single Phase Motor 2 Speed, 1 Winding, 3 Phase Motor
Ground A
T- 1
T- 4
Ground B
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-1 and T-4 leads.
High Speed
L
1
L
2
Low Speed
Line
To reverse, interchange any 2 line leads. Motors require magnetic control.
Motor
High Speed
1
Together
2
3
L
4
L
5
6
L
1
2
Line
3
Motor
Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase
Ground A
L
Line
L
1
T- 5
J-10
2
Ground B
T- 5
J-10
Ground B
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-5 and J-10 leads.
Link A
Link B
Low Voltage
Ground A
Link A & B
L
1
Line
L
2
Low Speed
T
3
Low Speed
T
2
Low Speed
T
Motor
To reverse: High Speed-interchange leads T
Low Speed-interchange leads T
line leads.
1
T
11
T
12
T
13
High Speed
High Speed
High Speed
and T
1
. Both Speeds-interchange any 2
2
Typical Damper Motor Schematic
460 Volts
456
789
12
L2L
L
1
Low Speed
and T
11
3
3
L
1
1
L
2
2
3
4
5
6
12
Line
L
3
Open
L
1
Line
L
2
L
3
.
Fan
Motor
Transformer**
Damper
Motor*
Second
Damper
Motor
Transformer**
L3
L2
L1
For 3 phase, damper motor voltage should be the same between L
L
. For single phase application, disregard L
2
available in 115, 230 and 460 volt models. The damper motor nameplate
voltage should be verified prior to connection. ** A transformer may be
provided in some installations to correct the damper motor voltage to the
specified voltage.
Final Installation Steps
a. Inspect fasteners and setscrews, particularly fan
mounting and bearing fasteners, and tighten according
to the recommended torque shown in the table below,
Recommended Torque for Setscrews/Bolts
b. Inspect for correct voltage with voltmeter.
c. Ensure all accessories are installed.
d. Test the fan to be sure the rotation is the same as indi-
cated 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.
.
and
. *Damper motors may be
3
1
Operation
Pre-Start Checks
a. Lock out all the primary and secondary power sources.
b. Inspect fasteners and setscrews, particularly those
used for mounting the unit, and tighten if necessary.
c. Inspect belt tension and pulley alignment. (Remember,
if belt tension is correct, a loud squeal occurs as the
fan increases to full power.)
d. Inspect motor wiring.
e. Ensure the belt touches only the pulleys.
f. Rotate the propeller to ensure it does not rub against
the base.
g. Ensure fan and ductwork are clean and free of debris.
h. Test the fan to ensure the rotation of the propeller is the
same as indicated by the rotation label.
i. Restore power to unit.
3
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