Larkin XUEF-300 Installation Manual
Document 480081
Model XUEF-200, 300 and 400
Utility Fans
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble,
install, operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property damage!
XUEF-200
XUEF-300 XUEF-400
General Safety Information
Only qualified personnel should install this fan.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards.
Other considerations may be required if seismic
activity is present. If more information is needed,
contact a licensed professional engineer before
moving forward.
1. Follow all local electrical and safety codes, as
well as the National Electrical Code (NEC) and the
National Fire Protection Agency (NFPA), where
applicable. Follow the Canadian Electric Code
(CEC) in Canada.
2. The rotation of the wheel is critical. It must be free
to rotate without striking or rubbing any stationary
objects.
3. Motor must be securely and adequately grounded.
4. Do not spin fan wheel faster than max cataloged
fan RPM. Adjustments to fan speed significantly
effects motor load. If the fan RPM is changed, the
motor current should be checked to make sure it is
not exceeding the motor nameplate amps.
5. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces or chemicals.
Replace cord immediately if damaged.
6. Verify that the power source is compatible with the
equipment.
7. Never open access doors to a duct while the fan is
running.
DANGER
Always disconnect, lock and tag power source
before installing or servicing. Failure to disconnect
power source can result in fire, shock or serious
injury.
CAUTION
When servicing the fan, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
CAUTION
Precaution should be taken in explosive
atmospheres.
DANGER
Pour écarter les risques d’incendie, de choc
électrique ou de blessure grave, veiller à toujours
débrancher, verrouiller et étiqueter la source de
courant avant l’installation ou l’entretien.
ATTENTION
Lors de toute intervention sur la soufflante, le moteur
peut être suffisamment chaud pour provoquer
une douleur voire une blessure. Laisser le moteur
refroidir avant toute maintenance.
ATTENTION
Faire preuve de précaution dans les atmosphères
explosives.
Utility Fans 1
Receiving
Upon receiving the product, check to ensure all
items are accounted for by referencing the delivery
receipt or packing list. Inspect each crate or carton
for shipping damage before accepting delivery. Alert
the carrier of any damage detected. The customer
will make a notation of damage (or shortage of items)
on the delivery receipt and all copies of the bill of
lading which is countersigned by the delivering
carrier. If damaged, immediately contact your Larkin
Representative. Any physical damage to the unit after
acceptance is not the responsibility of manufacturer.
Unpacking
Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative
to arrange for obtaining missing parts. Sometimes it
is not possible that all items for the unit be shipped
together due to availability of transportation and truck
space. Confirmation of shipment(s) must be limited to
only items on the bill of lading.
Handling
Fans are to be rigged and moved by the lifting
brackets provided or by the skid when a forklift is
used. Location of brackets varies by model and size.
Handle in such a manner as to keep from scratching
or chipping the coating. Damaged finish may reduce
the ability of the fan to resist corrosion. Fans should
never be lifted by the shaft, fan housing, motor, belt
guard, windband or accessories.
Storage
• Rotate fan wheel monthly and purge bearings once
every three months
• Energize fan motor once every three months
• Store belts flat to keep them from warping and
stretching
• Store unit in location which does not have vibration
• After storage period, purge grease before putting
fan into service.
If storage of fan is in a humid, dusty or corrosive
atmosphere, rotate the fan and purge the bearings
once a month. Improper storage which results in
damage to the fan will void the warranty.
Fans are protected against damage during shipment.
If the unit cannot be installed and operated
immediately, precautions need to be taken to prevent
deterioration of the unit during storage. The user
assumes responsibility of the fan and accessories
while in storage. The manufacturer will not be
responsible for damage during storage. These
suggestions are provided solely as a convenience to
the user.
INDOOR -
fans and accessories is indoors, above grade, in a
low humidity atmosphere which is sealed to prevent
the entry of blowing dust, rain or snow. Temperatures
should be evenly maintained between 30° to 110°F
(-1° to 43°C), wide temperature swings may cause
condensation and “sweating” of metal parts. All
accessories must be stored indoors in a clean, dry
atmosphere.
Remove any accumulations of dirt, water, ice, or snow
and wipe dry before moving to indoor storage. To avoid
“sweating” of metal parts allow cold parts to reach
room temperature. To dry parts and packages use a
portable electric heater to remove any moisture build
up. Leave coverings loose to permit air circulation and
to allow for periodic inspection.
The unit should be stored at least 3½ inches
off the floor on wooden blocks covered with moisture
proof paper or polyethylene sheathing. Aisles between
parts and along all walls should be provided to permit
air circulation and space for inspection.
The ideal environment for the storage of
(89 mm)
OUTDOOR - Fans designed for outdoor applications
may be stored outdoors, if absolutely necessary.
Roads or aisles for portable cranes and hauling
equipment are needed.
The fan should be placed on a level surface to prevent
water from leaking into the fan. The fan should be
elevated on an adequate number of wooden blocks
so it is above water and snow levels and has enough
blocking to prevent it from settling into soft ground.
Locate parts far enough apart to permit air circulation,
sunlight and space for periodic inspection. To
minimize water accumulation, place all fan parts on
blocking supports so rain water will run off.
Do not cover parts with plastic film or tarps as these
cause condensation of moisture from the air passing
through heating and cooling cycles.
Fan wheels should be blocked to prevent spinning
caused by strong winds.
Inspection and Maintenance During
Storage
While in storage, inspect fans once per month. Keep a
record of inspection and maintenance performed.
If moisture or dirt accumulations are found on parts,
the source should be located and eliminated. At
each inspection, rotate the wheel by hand ten to
fifteen revolutions to distribute lubricant in motor and
bearings. If paint deterioration begins, consideration
should be given to touch-up or repainting. Fans with
special coatings may require special techniques for
touch-up or repair.
Utility Fans2
Machined parts coated with rust preventive should be
restored to good condition promptly if signs of rust
occur. Immediately remove the original rust preventive
coating with petroleum solvent and clean with lintfree cloths. Polish any remaining rust from surface
with crocus cloth or fine emery paper and oil. Do not
destroy the continuity of the surfaces. Thoroughly
wipe clean with Tectyl® 506 (Ashland Inc.) or the
equivalent. For hard to reach internal surfaces or for
occasional use, consider using Tectyl® 511M Rust
Preventive, WD-40® or the equivalent.
Removing from Storage
As fans are removed from storage to be installed
in their final location, they should be protected and
maintained in a similar fashion until the fan equipment
goes into operation.
Prior to assembly and installation of the unit and
system components, inspect the fan assembly to
make sure it is in working order.
1. Check all fasteners, set screws on the fan, wheel,
bearings, drive, motor base and accessories for
tightness.
2. Rotate the fan wheel by hand and assure no parts
are rubbing. Access to the wheel is obtained
through a bolted panel located on the side of the
fan housing.
3. Ensure proper wheel settings for radial gap and
alignment. Refer to Radial Gap, Overlap and Wheel
Alignment section on page 9.
Table of Contents
General Safety Information .................... 1
Receiving ................................ 2
Unpacking ............................... 2
Handling ................................. 2
Storage .................................. 2
Inspection and Maintenance During Storage ...2-3
Removing from Storage ..................... 3
General Information
Unit and System Identification Tags ........... 4
Pre-Installation Information .................. 4
Electrical Disconnects ...................... 4
Moving Parts ............................. 4
Guards - Motor Cover, Weatherhood, Shaft,
Belt, Inlet or Outlet Guard .................. 4
Access Doors ............................. 4
Air Pressure and Suction .................... 4
Fans - Rigging and Lifting ..................... 5
Installation
Discharge Positions ........................ 5
Ducted Inlet Installations .................... 6
Ducted Outlet Installations ................... 6
Non-Ducted Installations .................... 6
Fan Drainage Piping and Trap Detail ........... 7
UL/cUL 762 Listed Fans for Restaurant Exhaust . 8
V-Belt Drives
Installation ............................... 8
Alignment of Pulleys and Belts ............... 8
Radial Gap, Overlap and Wheel Alignment
Radial Gap and Alignment ................... 9
Method for Centering Wheel ................. 9
Wheel Rotation ............................ 9
Field Coating Touch-Up Procedure for
Scratched Areas .......................... 10
Electrical Connections ...................... 10
Unit Start-Up
Visual Inspection of Equipment .............. 11
Check .................................. 11
Additional Steps for Initial Start-Up ........... 11
Vibration ................................. 12
Routine Maintenance and Operation
Fan Operation ........................... 12
Motors ................................. 12
Belt Drive Maintenance .................... 13
Variable Frequency Drive Operation .......... 13
Bearing Lubrication Schedule ............... 13
Wheel and Fastener Maintenance ............ 14
Bearing Replacement
Bearing Removal ......................... 14
Bearing Installation ....................... 15
Parts List ................................. 16
Troubleshooting ............................ 17
Maintenance Log .........................18-19
Our Commitment .....................Backcover
Utility Fans 3
General Information
To ensure a successful installation, the instructions in
this manual should be read and adhered to. Failure to
comply with proper installation procedures may void
the warranty.
Unit and System Identification Tags
Each fan has a permanently affixed manufacturer’s
engraved metal nameplate containing the model
number and individual serial number.
The tag shown
is an example of
an identification
nameplate on the
fan. The information
provides general
details about the fan,
as well as containing specific information unique to
the unit. When contacting your Larkin representative
with future needs or questions, please have the
information on this label available. Tags are mounted
in an area which is clearly visible, usually on the side
of the fan cabinet.
Pre-Installation Information
Before installation, it is important to be certain the
mounting surface will bear the operating weight of the
unit. For proper unit operation, it is also important that
it be operated in a completely level position.
For further details on safety practices involving
industrial and commercial fans, please refer to AMCA
Publication410.
Guards – Motor Cover, Weatherhood,
Shaft, Belt, Inlet or Outlet Guard
Do not operate fans without proper protective devices
in place. Failure to do so may result in serious bodily
injury and property damage. Check local codes to
ensure compliance for all protective devices.
Access Doors
Before opening access doors, ensure the fan wheel
has stopped moving and that the wheel has been
secured from being able to rotate. Do not operate fan
without access door in its fully closed position.
Air Pressure and Suction
In addition to the usual hazards associated with
rotating machinery, fans also create a dangerous
suction at the inlet. Special caution needs to be used
when moving around a fan, whether it is in operation
or not. Before start-up, make sure the inlet area is
clear of personnel and loose objects.
Electrical Disconnects
All fan motors should have disconnects located in
close visual proximity to turn off electrical service.
Service disconnects shall be locked-out when
maintenance is being performed.
Moving Parts
All moving parts must have guards to protect
personnel. Refer to local codes for requirements as to
the number, type and design. Fully secure fan wheel
before performing any maintenance. The fan wheel
may start “free wheeling” even if all electrical power
has been disconnected. Before the initial start-up or
any restart, check the following items to make sure
that they are installed and secure.
• Do not spin fan wheel faster than the maximum
cataloged fan rpm.
• Adjustments to fan speed significantly affects
motor load. If the fan RPM is changed, the motor
current should be checked to make sure it is not
exceeding the motor nameplate amps.
Utility Fans4
Fans – Rigging and Lifting
Installation
CAUTION
Fans should never be lifted by the shaft, motor,
motor cover or accessories.
Fans are to be rigged and moved by the lifting
brackets provided or by the skid when a forklift is
used. Location of brackets varies by model and size.
Handle in such a manner as to keep from scratching
or chipping the coating. Damaged finish may reduce
ability of fan to resist corrosion. See coating repair
section of this manual for details involving touch-up of
damaged surfaces.
• Use standard lifting and rigging practices.
• ALL lifting brackets on each component must be
utilized at the same time.
• Fan to be kept level during lifting and installation.
Shading indicates lifting point locations
XUEF-200 and XUEF-300
Lifting bracket on opposing side
Lifting bracket on opposing side
(not shown in this view)
(not shown in this view)
CAUTION
When installing a fan, ensure the proper protective
devices are used to protect personnel from
moving parts and other hazards. A complete line
of protective accessories are available from Larkin
including: inlet guards, outlet guards, belt guards,
shaft guards, protective cages and electrical
disconnects.
Move the fan to the desired location. Check and
tighten fasteners throughout the unit and then fasten
securely through mounting holes provided in the base
angles. The unit must be set level (shimming may be
necessary). Flexible duct connections and vibration
isolators should be used where noise is a factor.
The motor voltage and ampere rating must be
checked for compatibility with the electrical supply
prior to final electrical connection. Supply wiring to the
fan must be properly fused, and conform to local and
national electrical codes.
Discharge Positions
XUEF-200
CW UB
CW TH
XUEF-400
CCW UB
XUEF-300 and XUEF-400
CW BH
CCW BH
CCW TH
CW BAU
CCW BAU
CW UB
CCW UB
CW TAU
CCW TAU
CW TH
CCW TH
The discharge is factory set as specified by customer
order, however, certain sizes can be rotated to other
discharge positions in the field if necessary. If rotating
the fan housing, accommodations may need to be
made for the fan to drain properly. The XUEF-200,
all sizes and XUEF-300, sizes 24 and less, have field
rotatable housings. For the XUEF-400, rotatable
housings are standard sizes 30 and less, arrangement
10, and Class 0, I and II. Removal of the housing bolts
allows the discharge to be rotated to the clockwise
positions above. For DB discharge position, a portion
of the frame angle must be removed.
Fan rotation is always specified from the drive side of
the housing.
Utility Fans 5
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Turning
Vanes
POOR
POOR
GOOD
Length of Straight Duct
GOOD
One fan
wheel
diameter
One fan
diameter
3/4 to
one fan
wheel
diameter
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Turning
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POOR
POOR
GOOD
Length of Straight Duct
GOOD
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Turning
Vanes
POOR
POOR
GOOD
Length of Straight Duct
3/4 to one
fan
wheel
diameter
3/4 to one
fan
wheel
diameter
One fan
diameter
3/4 to one
fan
wheel
diameter
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Turning
Vanes
POOR
POOR
GOOD
POOR
Length of Straight Duct
GOOD
One fan
wheel
diameter
3/4 to
one fan
wheel
diameter
One fan
diameter
3/4 to
one fan
wheel
diameter
SYSTEM EFFECT FACTORS CURVES
STATIC PRESSURE LOSS
1.2
1.0
0.8
0.6
0.4
0.2
0.0
CURVE 1
CURVE 2
CURVE 3
CURVE 4
Installations with inlet or discharge configurations
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Turning
Vanes
POOR
POOR
GOOD
Length of Straight Duct
GOOD
3/4 to
one fan
wheel
diameter
SYSTEM EFFECT FACTORS CURVES
STATIC PRESSURE LOSS
1.2
1.0
0.8
0.6
0.4
0.2
0.0
CURVE 1
CURVE 2
CURVE 3
CURVE 4
that deviate from this manual may result in reduced
fan performance. Restricted or unstable flow at the
fan inlet can cause pre-rotation of incoming air or
uneven loading of the fan wheel yielding large system
losses and increased sound levels. Free discharge
or turbulent flow in the discharge ductwork will also
result in system effect losses. Refer to the following
diagrams for the most efficient installation conditions.
Ducted Inlet Installations
Inlet Duct Turns - Installation of a duct turn or elbow
too close to the fan inlet
reduces fan performance
because air is loaded
unevenly into the fan
wheel. To achieve full
fan performance, there
should be at least three
fan wheel diameters
between the turn or
elbow and the fan inlet.
POOR
Ducted Outlet Installations
Discharge Duct Turns - Duct turns located near the
fan discharge should always be in the direction of the
fan rotation.
Fan performance is reduced when duct turns
are made immediately off the fan
discharge. To achieve cataloged fan
performance there should be at least
three equivalent
duct diameters of
straight ductwork
between the fan
discharge and
any duct turns.
Three fan wheel diameters
Turning
Vanes
GOOD
Inlet Spin - Inlet spin is a frequent cause of reduced
fan performance. The change in fan performance is a
function of the intensity of spin and not easily defined.
The best solution is proper duct design and airflow
patterns. Turning vanes reduce the effects of inlet
spin.
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Turning
Vanes
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Utility Fans6
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Non-Ducted Installations
Inlet Clearance - Installation of a fan with an open
inlet too close to a wall or bulkhead will cause
reduced fan performance. It is desirable to have
a minimum of three-fourths of a wheel diameter
between the fan inlet and the wall.
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Free Discharge - Free or abrupt discharge into a
plenum results in a reduction in fan performance. The
effect of discharge static regain is not realized.
3/4 to one
fan
wheel
diameter
Single Fan Installation
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