Twin City TSL & QSL; Inline Centrifugal and Mixed Flow Fans - ES-895 - Manual

Introduction
This bulletin has been prepared to guide the users of
TSL Inline Centrifugal Fans and QSL Mixed Flow Fans
in the proper installation, operation and maintenance
procedures to insure maximum equipment life with
trouble-free operation.
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 be consistent with safe
handling practices. Verify the lift capacity and operating
condition of handling equipment. Maintain handling
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 (see Figure 1). On most units,
lifting lugs are fashioned to protect the fan and fan
housing from damage. Never lift a fan by the inlet or
discharge flange, shafting or drives, wheel, motor or
motor base, or in any other manner that may bend or
distort parts.
If 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. Wrap loosely so air
may circulate around the fan and moisture does not
collect, or use a desiccant. 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 sup-
plied with the bearings.
Foundations and Supporting Structures
The TSL and QSL series can be mounted horizontally,
vertically, or at any angle if ordered accordingly. Mounting
brackets are available to accept both vibration isolating
hangers or pads. Typical mounting arrangements are
shown in Figures 2 through 8. Floor or wall mounted
fans may be installed on a flat, rigid foundation.
When mounting to concrete, anchor bolts should be
“L” or “T” shaped with sufficient length for nuts, wash-
ers, shims, and threads for draw-down. Each bolt should
be placed in a sleeve or pipe with diameter larger than
the bolt to allow for adjustment. When the mounting
surface and the surface of the fan base do not match,
shim level. Do not distort the fan when tightening the
anchor bolts.
A fan mounted to or within a structure should be
placed as close as possible to a rigid member such as
a wall or a column. The structure must be designed for
rotating equipment. Static design for strength is not suf-
ficient to insure operation at low vibration levels. 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 may help
block the transmission of vibration into a structure.
Any ducting should have independent support; do not
use the fan to support ducting. Flexible connections are
required whenever the fan is supported on vibration iso-
lators.
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. Attach vibration isolators (if used) to appropriate
mounting clips on fan. Locate fan in position using
lifting instructions above.
4. Carefully level unit using shims (on rigid mounted
fans) at mounting hole locations. Fans mounted with
vibration isolators may be leveled by adjusting the
hardware.
5. Continue with Operations Checklist.
Motor Maintenance
The three basic rules of motor maintenance are:
1. Keep the motor clean.
2. Keep the motor dry.
3. Keep the motor properly lubricated.
Blow dust off periodically (with low pressure air) to
prevent motor from overheating.
Some smaller motors are lubricated for life. Lubrication
requirements are normally attached to the motor. Use
the motor manufacturer’s recommendations for relubrica-
tion. If this information is not available, the following
schedule may be used. 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 40
HP, every three years. For motors in dusty or dirty
environments or running 24 hours a day: divide the
service interval by 4. Do not over lubricate.
Drive Maintenance and Installation
V-belt drives need periodic inspection, retensioning, and
occasional belt replacement. When inspecting drives,
look for dirt buildup, burrs or obstructions that can
Figure 1.
Lifting With Lifting Lugs Lifting With Straps &
(Standard) Spreader Bar (Not Provided)
©2014 Twin City Fan Companies, Ltd.
ES-895
August 2014
TSL and QSL Inline Centrifugal
and Mixed Flow Fans
INSTALLATION, OPERATION & MAINTENANCE MANUAL