Loren Cook TCN-D Installation Manual
TCN
Tubular Centrifugal Inline Fans
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains the installation, operation
and maintenance instructions for standard units of the
TCN-Inline Blowers
• TCN-B • TCNH-B
• TCN-D • TCNH-D
Carefully read this publication prior to any installa-
tion or maintenance procedure.
Loren Cook catalog,
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 on special equipment, contact Loren
Cook Company Customer Service Department at 417/869-
6474.
Safety Practices for Users and Installers of
.
TCN
, provides additional information
.
Receiving and Inspection
Carefully inspect the fan and accessories for any damage
and shortage immediately upon receipt of the fan.
• Turn the wheel by hand to ensure it turns freely and
does not bind.
• Inspect dampers for free operation of all moving parts.
• Record on the
age.
Delivery Receipt
any visible sign of dam-
Handling
Lift the fan by foot brackets. Never lift by the shaft, motor,
or housing.
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.
Outdoor Storage
To maintain good working condition of a TCN when it is
stored outdoors, or on a construction site, follow the additional steps below.
• Cover the inlet and outlet, and belt tunnel opening to
prevent the accumulation of dirt and moisture in the
housing.
• Periodically rotate the wheel and operate dampers (if
supplied) to keep a coating of grease on all internal
bearing parts.
• Periodically inspect the unit to prevent damaging conditions.
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
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
by bolting the motor on the motor mounting plate in the
existing mounting slots.
Storage
If the fan is stored for any length of time prior to installation, completely fill the bearings with grease or moistureinhibiting oil. Refer to
fan in its original crate and protect it from dust, debris and
the weather.
Lubricants
on page 6. Also, store the
1
Note
Extreme vibration is a serious problem that may
cause structural and mechanical failure. To help
vibration and noise from being transferred to the
building, isolators are recommended.
Isolation Installation
Floor Mounted Spring Isolators
a. Mount fan and motor on unitary base (if supplied).
b. Elevate fan (or isolation base) to operating height and
insert blocks to hold in position.
c. Position isolators under the fan and vertically align by
inserting leveling bolt through mounting holes in the
fan or the base. The isolator must be installed on a
level surface.
d. Adjust the isolators by turning the leveling nut counter
clockwise several turns at a time alternately on each
isolator until the fan weight is transferred onto the isolators and the fan raises uniformly off the blocks. Then
remove the blocks.
e. Turn lock nut onto leveling bolt and secure firmly in
place against the top of the mounting flange or frame.
f. Secure isolators to mounting surface.
Ceiling Mounted Spring Isolator
Figure 2 - Ceiling Mount Isolators
Rubber-In-Shear Ceiling Isolators
Duct Installation
Efficient fan performance relies on the proper installation
of inlet and discharge ducts. Be sure your fan conforms to
the guidelines below.
Non-Ducted Inlet Clearance
If your fan has an open inlet (no duct work), the fan must
be placed 1 fan wheel diameter away from walls and bulkheads.
MIN
1 DIA
Rubber-In-Shear Isolator
Spring Isolator
Figure 1 -Floor Mount Isolators
Floor Mounted Rubber-In-Shear (RIS) Isolators
a. Mount fan and motor on a unitary isolation base (if
supplied).
b. Elevate fan to provide room to insert isolators between
the fan and foundation and block in position.
c. Position isolators under fan and secure bolts.
d. Remove blocks and allow fan to rest on floor. Isolators
must be installed on a level surface (leveling should
not be required).
e. Secure isolators to mounting surface.
Ceiling Mounted Spring and Rubber-in-Shear (RIS) Isolators
a. Elevate fan to operating height and brace.
b. Attach threaded rod to overhead support structure
directly above each mounting hole. Rod should extend
to within a few feet of fan.
c. Attach isolator to end of threaded rod using a nut on
each side of isolator bracket.
d. Insert another section of threaded rod through the fan
mounting hole and isolator.
e. Attach two nuts to threaded rod in isolator.
f. Place adjusting nut and locking nut on threaded rod
near fan mounting bracket.
g. Alternately rotate adjusting nut at each mounting loca-
tion until the fan weight is uniformly transferred to the
isolators. Remove bracing.
Non-ducted Inlet Clearance
Free Discharge
Avoid a free discharge into the plenum. This will result in
lost efficiency because it doesn’t allow for a static regain.
Correct
Free Discharge
Incorrect
Inlet Duct Turns
For ducted inlets, allow at least 3 fan wheel diameters
between duct turns or elbows and the fan inlet.
Correct
Min 3
Dia
Incorrect
Inlet Duct Turns
Discharge Duct Turns
Where possible, allow 3 duct diameters between duct
turns or elbows and the fan outlet. Refer to the drawing at
the top of page 3.
2
.
Correct
Min 3
Dia.
Incorrect
Discharge Duct Turns
Wheel-to-Inlet Clearance
The correct wheel-to-inlet clearance is critical to proper
fan performance. This clearance should be verified before
initial start-up since rough handling during shipment could
cause a shift in fan components. Refer to wheel/inlet drawing below for correct overlap.
Adjust the overlap by loosening the wheel hub and moving the wheel along the shaft to obtain the correct value.
A uniform radial gap (space between the edge of the
cone and the edge of the inlet) is obtained by loosening the
inlet cone bolts and repositioning the inlet cone.
Size Overlap
100
120
Radial Clearance
Wheel/Inlet Overlap
Overlap
135
150
165
180
195
210
225
245
270
300
330
365
402
445
490
540
600
660
730
5/8”
3/4”
1”
1-1/4”
Belt and Pulley Installation
Belt tension is determined by the sound the belts make
when the fan is first started. Belts will produce a loud
squeal which dissipates after the fan is operating at full
capacity. If the belt tension is too tight or too loose, lost efficiency and possible damage can occur.
Do not change the pulley pitch diameter to change tension. This will result in a different fan speed.
a. Loosen motor plate adjustment bolts 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 3
.
c. Lock the motor plate adjustment nuts in place.
d. Ensure pulleys are properly aligned. Refer to
1/4 inch
1 foot
Figure 3
Figure 4
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 4
illustrates correct and incorrect pulley alignment. A recommended method of inspecting the pulley
alignment is shown in
Figure 5
. 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.
Correct
Incorrect Incorrect
Figure 4
Incorrect
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.
Lock off all power sources before unit
is wired to power source.
Leave enough slack in the wiring to
allow for motor movement when adjusting belt tension. Some fractional motors
have to be removed in order to make the
connection with the terminal box at the end of the motor. To
remove motor, remove bolts securing motor base to power
assembly. Do not remove motor mounting bolts.
Figure 5
3
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