Larkin XUED Installation Manual

Document 480956

Model XUED

Centrifugal Utility Fan

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!

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.

Centrifugal Utility Fan 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 Larkin Industries, Inc.
Any physical damage to the unit after acceptance is
not the responsibility of Larkin Industries, Inc.

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.

Storage

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.

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.

Centrifugal Utility Fan2

Table of Contents

General Safety Information .................. 1

Receiving, Unpacking, Storage, Inspection ...... 2

Installation

Discharge Positions ....................... 3

Effect of Installation on Performance .......... 3

Pre-Starting Checks

Wheels and Wheel Rotation ................ 4

Mounting for Severe Duty Installation .......... 5

Maintenance

Motor Maintenance ....................... 6

Wheel and Fastener Maintenance ............ 6

Parts List ................................ 6

Troubleshooting ........................... 7

Effect of Installation on
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, increased
sound levels and structural failure of the fan wheel.
Free discharge or turbulent flow in the discharge
ductwork will also result in system effect losses.

These examples show the system layout and inlet
and discharge configurations which can affect fan
performance.

7o MAX.

Installation

Inspect the unit for any damage and report it to
the shipper immediately. Also, check to see that all
accessory items are accounted for.

Move the fan to the desired location and 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.

The discharge is factory set as specified by customer
order, however, it can be rotated to other discharge
positions in the field if necessary. Removal of the
housing bolts allows the discharge to be rotated to
the clockwise positions below. For TAD, BD and BAD
discharge positions, a portion of the frame angle must
be removed.

Clockwise rotation shown. Counterclockwise
discharge positions are a mirror image of those
shown. Fan rotation is always specified from the drive
side of the housing.

Discharge Positions

POOR

POOR

POOR

POOR

POOR

Turning

Varies

FAIR

POOR

FAIR

FAIR

POOR

One

Impeller

Dia.

GOOD

FAIR

Should be at least
1/2 Impeller Dia.

GOOD

GOOD

Not Greater than

o

60

Including Angle

FAIR

CW BH CW BAU CW TAUCW UB

CW TH CW TAD

CW DB

CW BAD

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