Twin City Tubeaxial, Vaneaxial, & Duct Fans ES-191 - Manual

Introduction
The purpose of this manual is to provide instructions
that complement good general practices when install-
ing or operating fans manufactured by Twin City Fan &
Blower. It is the responsibility of the purchaser to pro-
vide qualified personnel experienced in the installation,
operation, and maintenance of air moving equipment.
As always, follow good safety practices when install-
ing, maintaining and operating your air moving equip-
ment. A variety of safety devices is available. It is the
user’s responsibility to determine adequate safety mea-
sures and to obtain the required safety equipment.
Shipping and Receiving
All Twin City Fan & Blower products are carefully con-
structed and inspected before shipment to insure the
highest standards of quality and performance.
Compare all components with the bill of lading or
packing list to verify that the proper unit was received.
Check each unit for any damage that may have
occurred in transit. Any damage should be reported
immediately to the carrier and the necessary damage
report filed.
Handling
Handling of all air moving equipment should be con-
ducted by trained personnel and should be consistent
with safe handling practices. Verify the lift capacity and
operating condition of handling equipment. Maintain han-
dling equipment to avoid serious personal injury.
Units shipped completely assembled may be lifted
with slings and spreader bars. Use well-padded chains,
cables or nylon straps. On most units, lifting lugs are
provided for attaching chains. Lift the fan in a fashion
that protects the fan and fan coating from damage.
Never lift a fan by the inlet or discharge flange, shafting
or drives, wheel or impeller, motor or motor base, or in
any other manner that may bend or distort parts.
If fan installation is to be delayed, store the unit in a
protected area. Protect the fan and motor bearings from
moisture and vibration (or shock loading). For extended
storage, wrap entire unit in plastic.
Extended storage requires monthly inspections. Check
for corrosion or damage to the unit and for debris within
the fan. Rotate the fan wheel a few revolutions. Stop the
wheel in a position other than the initial position. Grease
the bearings every month with a grease compatible with
the grease supplied with the bearings.
Foundations and Supporting Structures
Typical mounting arrangements are shown in Figures 4
and 5 on pages 3 and 4. Floor mounted fans should be
installed on a flat, level, rigid concrete foundation. They
require the mass of the foundation to be at least three
times that of the fan assembly. The plan area should
be no more than twice that required by the equipment.
Foundations with larger areas should have correspond-
ingly larger mass. Anchor bolts should be “L” or “T”
shaped with sufficient length for nuts, washers, shims,
and threads for draw-down. Each bolt should be placed
in a sleeve or pipe with a diameter larger than the bolt
to allow for adjustment. When the mounting surface
and the surface of the fan base do not match, shim
or make allowance for grouting. Do not distort the fan
when tightening the anchor bolts.
Fans mounted to or within a structure should be
placed as close as possible to a rigid member such
as a wall or column. The structure must be designed
for rotating equipment; static design for strength is
not sufficient to insure proper operation. Supports for
suspended fans must be cross-braced to prevent side
sway. Structural resonance should be at least 20% from
fan operating speed. Vibration isolators should be used
where applicable.
Any ducting should have independent support; do not
use the fan to support ducting. Isolating the fan from
ductwork with flex connections eliminates transmission
of vibration. Fans handling hot gases require expansion
joints at both the inlet and discharge to prevent exces-
sive loads caused by thermal growth.
Fan Installation, Factory Assembled Units
Follow proper handling instructions as given earlier.
1. Move the fan to the final mounting position.
2. Remove skid, crates, and packing materials carefully.
3. Place vibration pads or isolation base on mounting
bolts. Line up holes in fan base with bolts.
4. Place fan on mounting structure. Carefully level the
unit using shims as required at all mounting hole
locations. Bolt down the unit.
5. Any grout may now be used. Bolt the fan in position
before applying grout. Do not depend upon grout to
support rotating equipment.
6. Continue with Operations Checklist.
General Motor Maintenance
The three basic rules of motor maintenance are: keep the
motor clean, keep it dry, and keep it properly lubricated.
Blow dust off periodically (with low pressure air) to
prevent the motor from overheating.
Some smaller motors are lubricated for life. Motors
less than 10 hp running about eight hours a day in a
clean environment should be lubricated once every five
years; motors 15 to 50 hp, every 3 years; and motors
50 to 150 hp, yearly. For motors in a dusty or dirty
environment or running 24 hours a day, divide the ser-
vice interval by 2. If the environment is very dirty or
high temperatures exist, divide the service interval by
4. Lubrication requirements are normally attached to the
motor. Do not overlubricate.
Drive Maintenance
V-belt drives need periodic inspection and occasional
belt replacement. When inspecting drives, look for dirt
buildup, burrs or obstructions that can cause premature
belt or drive replacement. If burrs are found, use fine
emery cloth or a stone to remove them. Be careful
©2006 Twin City Fan Companies, Ltd.
ES-191
August 2014
Tubeaxial, Vaneaxial & Duct Fans
Type TCVA, TCTA, TCVS, TCTS, TCVX & TCDF
INSTALLATION, OPERATION & MAINTENANCE MANUAL