Avtec AX Installation Manual
Document 464664
Model AX
®
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!
Model AX
Standard Long Casing
Optional Short Casing
AX
Optional Vane Section
AX-S
Optional Roof Upblast
Table of Contents
Receiving, Unpacking Handling and Storage ........2
Removing from Storage ........................2
Lifting .......................................3
Effects of Installation on Performance .............3
Typical Installation .............................4
Operation and Unit Start-Up .....................4
Performance Adjustments
Field Performance Adjustments .................5
Adjusting Performance with a Variable
Frequency Drive ...........................5
Adjusting Performance through Blade
Pitch Adjustments ..........................5
Torque Specifications for Bushing and
Propeller Bolts ............................5
Maintenance .................................6
Parts List ....................................6
Maintenance Log ..............................7
Our Commitment ..............................8
AX-V
AX-U
General Safety Information
Only qualified personnel should install this unit.
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 high winds or seismic
activity are 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), the National
Fire Protection Agency (NFPA), where applicable.
Follow the Canadian Electric Code (CEC) in Canada.
2. The rotation of the propeller 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 propeller faster than the maximum
cataloged fan rpm. Adjustments to fan speed with
Variable Frequency Drives (VFD) may affect 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.
DANGER
Always disconnect power before working on or near a
unit. Lock and tag the disconnect switch or breaker to
prevent accidental power up.
CAUTION
When servicing the unit, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
®
Axial Fan
1
Receiving
Upon receiving the product, check the bill of lading to
ensure all items were received. Inspect each crate for
shipping damage before accepting delivery. Notify the
carrier if any damage is noticed. The carrier will make
notification on the delivery receipt acknowledging any
damage to the product. All damage should be noted on
all the copies of the bill of lading which is countersigned
by the delivering carrier. A Carrier Inspection Report
should be filled out by the carrier upon arrival. If
damaged upon arrival, file claim with carrier. Any
physical damage to the unit after acceptance is not the
responsibility of Greenheck Fan Corporation.
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
Handle in such a manner as to keep from scratching
or chipping the coating. Fans should not be lifted by
the motor shaft, motor housing or fan accessories.
Damaged finish may reduce ability of unit to resist
corrosion.
Storage
Units 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 unit 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 — The ideal environment for the storage of
units 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°F (-1°C)
and 110°F (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. 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 — Units 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 unit. The unit should be
elevated on an adequate number of wooden blocks so
that 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 unit parts on blocking
supports so that 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.
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 fan propeller by hand ten to fifteen
revolutions to distribute lubricant on motor. Every three
months, the fan motor should be energized. 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. Wipe thoroughly
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 or
WD-40
® or the equivalent.
REMOVING FROM STORAGE — As units are removed
from storage to be installed in their final location, they
should be protected and maintained in a similar fashion,
until the equipment goes into operation.
Prior to installing the unit and system components,
inspect the unit assembly to make sure it is in working
order.
1. Check all fasteners on the fan, propeller, motor base,
and accessories for tightness.
2. Rotate the fan propeller by hand and assure no parts
are rubbing.
3. Fans should not be lifted by the motor shaft, motor
housing or fan accessories.
2
Axial Fan
®
Lifting Effects 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
uneven loading of the fan propeller yielding large system
losses and increased sound levels. Free discharge or
turbulent flow in the discharge ductwork will also result
Standard
Long Casing
Optional
Vane Section
Fan models AX, AX-V or AX-S are to
be lifted using a minimum of four (4)
points on the fan housing or attach
two suitable chains/straps around
the entire fan housing, one near each
duct flange.
For flange mounted fans, attach
suitably sized chains or lifting straps
to two locations on the inlet and
outlet flanges as shown.
For fans with Universal Mounting
brackets, use brackets for lifting
connection points.
Optional
Short Casing
in system effect losses.
The most common inlet and discharge conditions which
affect fan performance are:
Inlet Duct Turns
1 Fan
Dia.
Turning
Vanes
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 prop. To achieve full fan
performance there should be at least one to two fan
diameters between the turn or elbow and the fan inlet.
Optional
Roof Upblast
Fan model AX-U are to be lifted
using the four (4) windband gussets
located between the butterfly
damper section of the fan and the
exterior windband unless welded
lifting lugs are provided on fan
housing. Welded lifting lugs are
present on AX-113 thru AX-160.
A spreader bar is recommended
to prevent damage to the damper
section when lifting.
Discharge Duct Turns
Poor
3 Diameters 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 three
equivalent fan diameters of straight ductwork between
the fan discharge and any duct turns.
®
Axial Fan
3
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