Accurex XTIF Owner’s Manual
Document 470737
Model XTIF
Tubular Centrifugal 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 these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
XTIF Inline
Level 1 & 2
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. 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.
Tubular Centrifugal Fans 1
Table of Contents
General Safety Information .................... 1
Receiving ................................ 2
Unpacking ............................... 2
Handling ................................. 2
Storage .................................2-3
Inspection and Maintenance During Storage .... 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, Shaft, Belt,
Inlet or Outlet Guard ...................... 4
Access Doors ............................. 4
Air Pressure and Suction .................... 4
Fans - Rigging and Lifting ..................... 5
Installation
Effect of Installation on Performance .......... 5
Typical Installations ........................ 6
Installation of UL/cUL 762 Listed Fans
for Restaurant Exhaust ...................6-7
Drain Connection .......................... 7
Duct Connection .......................... 7
Sealant / Gasket / Seal Replacement .......... 7
V-Belt Drives
V-Belt Drive Installation ..................... 8
Alignment of Pulleys and Belts ............... 8
Radial Gap, Overlap and Wheel Alignment
Radial Gap and Alignment ................... 8
Method for Centering Wheel ................. 8
Radial Gap and Overlap Dimensions ........... 9
Field Coating Touch-up ....................... 9
Unit Start-Up
Visual Inspection of Equipment .............. 10
Check .................................. 10
Additional Steps for Initial Start-Up ........... 10
Electrical Connections ...................... 11
Vibration ................................. 11
Routine Maintenance and Operation
Fan Operation ........................... 12
Motors ................................. 12
Belt Drive Maintenance .................... 12
Bearing Lubrication Schedule ............... 13
Wheel, Fasteners and Set Screws ............ 13
Variable Frequency Drive Operation .......... 13
Removal of Dust and Dirt. . . . . . . . . . . . . . . . . . . 13
Cleaning Internal Components .............. 13
Parts List ................................. 14
Troubleshooting ............................ 15
Maintenance Log .....................Backcover
Our Commitment .....................Backcover
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
notification 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 Accurex Representative. Any
physical damage to the unit after acceptance is not the
responsibility of the 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 configuration 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, 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 a 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
Tubular Centrifugal Fans2
The ideal environment for the storage of
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
(89 mm)
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.
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.
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 8.
Inspection & 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 lint-free
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
hard to reach internal surfaces or for occasional use,
consider using Tectyl
or the equivalent.
®
506 (Ashland Inc.) or the equivalent. For
®
511M Rust Preventive, WD-40®
Tubular Centrifugal 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
Accurex 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 housing.
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, 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.
Provisions to open and remove the access door is
required for periodic cleaning and maintenance. The
access door is clearly labeled and indicates that access
to this location must be maintained. Any enclosure
openings required to reach the access panel shall be
large enough to allow for the removal of the panel.
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 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.
Tubular Centrifugal Fans4
Fans - Rigging and Lifting
Installation
IMPORTANT
Fans should never be lifted by 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. XTIF Inline models
have mounting brackets located at the ends of the fan
housing with which slings can be attached (Fig. 1).
Handle in such a manner as to keep from scratching or
chipping the coating. Damaged finish may reduce ability
of fan to resist corrosion.
• Use standard lifting rigging practices.
• ALL lifting brackets on each component must be
utilized at the same time.
• Fan to be kept level during lifting and installation.
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.
Effect of Installation on Performance
Any installation with inlet or discharge configurations
that deviate from these recommendations may result in
reduced fan performance. Restricted or unstable flow
at the fan inlet can cause pre-rotation of incoming air
or even 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.
The most common inlet and discharge conditions which
affect fan performance are:
INLET DUCT TURNS
Fig. 1
1 Fan
Wheel
Dia.
Turning
Van es
Good Poor
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 one to two fan
wheel diameters between the turn or elbow and the fan
inlet.
DISCHARGE DUCT TURNS
Poor
Length of Straight Duct
Good
Fan performance is reduced when duct turns are made
immediately off the fan discharge. To achieve cataloged
fan performance, there should be at least one equivalent
duct diameter of straight ductwork between the fan
discharge and any duct turns.
Tubular Centrifugal Fans 5
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