TM
www.trianglefans.com • 1-800-255-9014
TRIANGLE ENGINEERING
OF ARKANSAS, INC.
TRIANGLE ENGINEERING OF ARKANSAS, INC.
1101 N. Redmond Rd., Jacksonville Arkansas 72076
www.trianglefans.com • 1-800-255-9014 • Fax (501) 982-5691
Tube Axial Fans
INSTALLATION, OPERATING AND
MAINTENANCE MANUAL
Model TAD, TAB, VAD and VAB fans
are thoroughly inspected and test run at the
factory, however, damage may occur during
handling and shipping. Consequently, it is
important that the unit be carefully inspected
for visible and concealed damage before
beginning installation. Report any damage to
the shipper immediately. In addition, assure all
accessory items are accounted for.
INSTALLATION
LIFTING
Attach two suitable chains or straps
around the entire tubular fan housing,
one near each duct flange, when lifting
large horizontal mount fans. Secure the
fan housing to prevent the weight of a top
or side mounted motor from rotating the
housing while being lifted.
For vertical hanging installations, attach
a suitable lifting device to the fan housing or
inlet/outlet flange.
The fan should never be lifted by
the motor, belt tube, propeller, shaft or
accessories.
MOUNTING
Tube axial fans for horizontal base mount
are available with rotatable mounting feet as
an optional feature. By removing fasteners
attaching the mounting feet to the inlet and
outlet flanges, the tubular housing may be
rotated to position the motor on either side
or the top of the fan (belt drive units).
In applications where the fan is to be
suspended horizontally or vertically from the
ceiling, optional hanging brackets are welded
to the fan housing. Fans can be suspended
with motors on top or bottom. The installer
must provide suitable rods for hanging
installations.
Triangle Engineering recommends use
of base or hanging vibration isolators on
all tube axial installations. Do not support
ductwork, etc. on isolators designed to
support weight of the fan only.
ELECTRICAL CONNECTION
The electrical supply must be compatible
with the fan motor with regard to voltage,
phase and amperage capacity. Moreover, the
electrical supply line must be properly fused
and conform to local and national electrical
codes.
For belt drive units, the electrical supply
line is routed to the optional safety disconnect
switch (if supplied) and then to the motor.
Direct drive units have a prepunched wiring
hole in the fan housing. The electrical supply
may be connected to an optional safety
disconnect switch or a junction box may be
installed for direct connection to the motor
wires.
WARNING
DISCONNECT AND SECURE TO THE “OFF" POSITION ALL
ELECTRICAL POWER TO THE FAN PRIOR TO INSPECTION OR
SERVICING. FAILURE TO COMPLY WITH THIS SAFETY
PRECAUTION COULD RESULT IN SERIOUS INJURY OR DEATH.
Before installing the ductwork, check all fasteners and
set screws for tightness. This is especially important for
bearings and propellers. Rotate the propeller by hand
to assure it turns freely and does not rub on the tubular
housing.
Direction of propeller rotation should be checked by
turning the unit on momentarily. Rotation should be in
the same direction as the rotation decal affixed to the
unit. To reverse rotation on three phase installations,
simply interchange any two of the three electrical leads.
For single phase installations, follow the wiring diagram
located on the motor.
ROUTINE MAINTENANCE
See WARNING above.
Once the fan has been put into operation, periodic
maintenance should be scheduled to preserve its
reliability and performance.
Items to be checked are:
1. Belts
2. Bearings
can be adjusted by loosening the motor plate bolts and
adjusting the jack screws as required.
*Deflection height = 1/64" per inch of span
BELT AND PULLEY ALIGNMENT
WRONG WRONG CORRECT
It is very important that the drive pulleys remain
in proper alignment after adjustments are made.
Misalignment of pulleys will result in premature belt wear,
noise and loss of fan efficiency.
3. Fasteners and Set screws
4. Lubrication
5. Removal of dust and dirt
1. BELTS (BELT DRIVE)
Premature belt failures are most frequently caused
by improper belt tension (either too tight or too loose),
misaligned pulleys or prying belts on or off pulleys.
The proper tension for operating a V-belt is the lowest
tension at which the belts will not slip at peak load
conditions. For initial tensioning, the proper belt deflection
is 1/64" for each inch of belt span, measured half way
between pulley centers. For example, a belt span of 32
inches should have 32/64 or 1/2 inch of deflection using
moderate thumb pressure at midpoint of the drive. Check
belt tension after the first 24 hours of operation, after 100
hours of operation and periodically thereafter. Belt tension
2. BEARINGS (BELT DRIVE)
The pillow block ball bearings installed on model TAB
fans are grease lubricated, self aligning and selected
for a minimum average life in excess of 200,000 hours.
However, bearings are one of the most critical moving
parts of a fan and should be inspected at regular
maintenance intervals. Locking collars, set screws and
fasteners attaching the bearings to the fan, in addition to
general condition of the bearings, should be checked
3. FASTENERS AND SET SCREWS
Fan vibration has a tendency to loosen mechanical
fasteners. Periodic inspection should include checking all
fasteners and set screws for tightness.
4. LUBRICATION
5. REMOVAL OF DUST AND DIRT
(BELT DRIVE) Bearings operating in a clean
environment and temperatures between 32 degrees F
and 200 degrees F should be lubricated semi-annually
using a high quality lithium based grease. Bearings
operating outside these temperature parameters require
special high or low temperature grease. If contaminated
or high moisture conditions exist, more frequent
lubrication is required.
Some model TAB fans may be equipped with
extended lubrication lines as optional equipment. The
grease fittings are located on the exterior of the fan
housing next to the motor cover and should be wiped
clean before adding grease.
When adding grease to fan bearings, rotate the
fan shaft while slowly operating a manual grease gun.
Be careful not to unseat the bearing seals by overlubricating or using excessive pressure. Stop pumping
when a very slight resistance is felt at the grease gun.
(BELT AND DIRECT DRIVE) Greasing of motors is
intended only when fittings are provided. Many fractional
horsepower motors are permanently lubricated for life
and require no further lubrication. Motors supplied with
grease fittings should be greased in accordance with the
manufacturer’s directions on the motor nameplate.
Model TAD and TAB fans require very little
attention when moving clean air. If exhausting dirty
or contaminated air, the propeller should be cleaned
periodically. If left to accumulate, dirt on the propeller
blades may cause an unbalanced condition resulting
in excessive vibration and premature failure of the fan.
Some fans are supplied with an optional access door for
inspection, servicing and cleaning of fan components.
Periodically, the optional motor cover should be
removed (if supplied) and dirt removed from the
motor. Cleaning should be limited to exterior surfaces.
Removing dust and dirt accumulation on the motor
housing assists motor cooling. Motors should never be
sprayed directly with water, steam or solvents.
TRIANGLE ENGINEERING OF ARKANSAS, INC.
1101 N. Redmond Rd., Jacksonville Arkansas 72076
www.trianglefans.com • 1-800-255-9014 • Fax (501) 982-5691
WARRANTY
WARRANTY Upon payment of this invoice in full, the seller
warrants those goods manufactured by it and sold hereby to
be free of defects in material and workmanship only if properly
installed, cared for, and operated with competent supervision
under normal conditions as specified to us in writing. The seller’s
obligation under this warranty is limited to replacing or repairing
at its option and at its own factory any defective part or parts
thereof which shall, within one year after shipment by it to the
original purchaser, be returned to its factory with transportation
charges prepaid. Upon such repair or replacement all obligations
under this warranty shall be deemed fulfilled and terminated.
Triangle Engineering makes no warranty whatsoever in respect
to parts or accessories not supplied by or installed by Triangle
Engineering. The seller shall not be liable for any loss or damage
whatsoever to any person, firm, or corporation, and shall not
be liable or responsible for any repairs made outside of its own
factory. There are no other warranties or representations, express
or implied, made or effective upon this sale The above warranty
supersedes and is in lieu of all other warranties express or
implied which extend beyond the description contained herein. No
person, firm, corporation, agent, or dealer is authorized to make
any warranties on behalf of Triangle Engineering nor to assume
for Triangle Engineering any liability in connection with any of
Triangle Engineering’s products.
All quotations are subject to acceptance within sixty (60) days.
Prices in quotation covering Triangle Engineering’s manufactured
products are firm for one year from date of order. All orders are
subject to approval by Triangle Engineering of Arkansas, Inc.
All customer purchase orders are hereby made subject to the
provisions of this acceptance and the seller’s failure to object
to provisions contained in customer’s purchase orders or other
communications shall not be deemed a waiver of the terms
and conditions hereof nor acceptance of such provisions. No
representations or guarantees other than those contained herein
shall be binding upon Triangle Engineering unless made in writing
and signed by an official of Triangle Engineering.
NOTICE The Purchaser agrees, in exchange for the pricing
schedules used in this transaction, that any litigation of any
nature arising from this transaction, or in any other way related
to the relationships involved herein shall be exclusively subject
to venue, in personam and subject matter jurisdiction in any
other court or courts in any other county or state are hereby
waived; further, any transaction in which the Purchaser is a
corporation, other than a corporation with publicly traded stock,
is recognized to include the guaranty of performance from and by
the principal shareholders thereof whose authorization of such
guaranty is represented to have been secured prior to the first and
subsequent transaction and which guaranty is evidenced through
the corporation’s purchase.
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