Page 1
Document 464652
®
Model Vektor
®
-MH, Vektor ®-MD
and Vektor
Laboratory Exhaust System
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!
Vektor-MH, Vektor-MD, and Vektor-MS
General Safety Information
Only qualified personnel should install this fan system.
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.
Table of Contents
General Safety Information ......................1
Receiving / Unpacking / Handling / Storage .....2-3
General Information
Unit and System Identification ..................3
Pre-Installation Information ....................3
Electrical Disconnects / Moving Parts / Guards ....3
Air Pressure and Suction ......................3
System Components .........................4-5
Roof Curb and Mounting Details .................5
Bypass Air Plenum
Rigging, Lifting and Installation ...............6-7
Fan Housing
Rigging, Lifting and Installation ...............6-7
Nozzle, Windband, Silencer, Weatherhood ........8
Duct Connections - Side Inlet ...................9
Bottom Inlet .................9
Plenum Drainage Piping / Trap Detail ..............9
Bypass Air Plenum - Isolation Damper and
Actuator Mounting ..........................10
Field Coating Touch-Up .......................10
Electrical Connections ........................11
Start-Up ....................................12
Vibration ...................................13
Routine Maintenance
Fan / V-Belt Drive / Motors / Bearings / Nozzle 14-15
V-Belt Drive Installation ........................15
Bearing Replacement - Belt or Direct Drive .....16-17
Jib Crane Assembly (Optional) ..................17
Motor Change-Out Procedure ..................18
High Strength Metal Disc Coupling. . . . . . . . . . . . . . .18
Troubleshooting ..............................19
Nozzle Parts and Assembly .............Backcover
Our Commitment ......................Backcover
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 Electrical 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 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.
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 power before working on or near a
fan. Lock and tag the disconnect switch or breaker to
prevent accidental power up.
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.
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-MS
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Laboratory Exhaust Systems
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Page 2
Receiving
Greenheck model Vektor-MH, Vektor-MD and Vektor-MS
fans are thoroughly inspected, test run at the factory,
and shipped on a skid or packaged to minimize damage
during shipment. The transportation carrier has the
responsibility of delivering all items in their original
condition as received from Greenheck. The individual
receiving the equipment is responsible for inspecting the
unit for obvious or hidden damage and recording any
damage on the bill of lading before acceptance of the
equipment. All claims (if necessary) shall be filed with
the final carrier.
Unpacking
Verify that all required parts and the correct quantity
of each item have been received, including accessory
kit containing gasketing, etc. 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
The Vektor-MH, Vektor-MD and Vektor-MS laboratory
exhaust system is shipped in subassembly sections
for easy rigging and installation. Depending on the fan
size, the sections can include: Blower Assembly, Stack
Extension, and Discharge Nozzle.
The Vektor-MH, Vektor-MD and Vektor-MS are designed
to be self-supporting and standing (without the use
of guy wires) when assembled per the instructions
provided within this manual. If additional components
are supplied, contact factory or reference submittal
if additional supports or guy wires are required. All
subassembly sections have lifting lugs as shown.
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 - The ideal environment for the storage of
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° and 110°F.
(-1°C and 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 get rid of 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 in. (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
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 fan 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.
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; see
backcover.
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 on motor and
bearings. Bearings should be lubricated at three month
intervavls. The quantity of grease should be per the
lubrication label.
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 coating
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. Wipe
clean thoroughly 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.
Laboratory Exhaust Systems
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Page 3
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 Vektor fan 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(s) 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 (see page 18).
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 Greenheck
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.
Vektor fan systems may arrive in component pieces
due to shipping restrictions. Individual components of a
system have matching identification tags which should
be used to identify and assemble the complete system.
Assembling systems with different identification tags
can cause reductions in the fan(s) performance.
Prior to fully assembling and installing the VektorMH, Vektor-MD or Vektor-MS fans, inspect bypass air
plenums and the fan assembly to make sure they are in
working order.
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.
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.
Guards (Motor Cover, Weatherhoods,
Actuator Cover)
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.
Plenum 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.
®
Laboratory Exhaust Systems
3
Page 4
System Components
Date: 02/14/2013Job: CAPS DRAWING
Revision: 00
GFC SO:
Project #: VXXXXMark:
Vektor-MH Assembly View - Belt Drive
Belt and direct drive units share similar system
components and assembly configuration.
Nozzle
Blower Housing
Bypass Air Plenum
Roof Curb or
Structural Support
Vektor-MD Assembly View - Direct Drive
Belt and direct drive units share similar system
components and assembly configuration.
Windband
Nozzle
Blower Housing
Bypass Air Plenum
Roof Curb or
Structural Support
Motor Cover
Lifting Lug
Motor Cover/Access
Isolation Damper
Isolation Damper
Actuator Cover
Weatherhood
with Birdscreen
Bypass Damper
Actuator Access Door
Access Panel
Bolted / Gasketed
(all sides)
Blower Housing
Access Door
Panel Lifting
Lugs
NOTE
Actual component pieces may vary from these
images. Refer to your project submittal drawing.
Fan
Shaft
Direct Drive
Isolation Damper
Isolation Damper
Actuator Cover
Weatherhood
with Birdscreen
Bypass Damper
Actuator Access Door
Motor
Flex Coupling
Shaft Bearing
Drain
Blower Housing
Access Door
Panel
Lifting
Lugs
Access Panel
Bolted / Gasketed
(all sides)
Laboratory Exhaust Systems
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Page 5
A A
VEKTOR ROOF CURB INSTALLATION GUIDE
Install 3/8 inch (9.525 mm) SS power wedge bolts
2.5 inch (63.5 mm) maximum spacing from curb corners
4.5 inch (114.3 mm) maximum bolt spacing
3.5 inch (88.9 mm) minimum embedment
4.5 inch (114.3 mm) minimum edge
distance centered in flange
ALL HARDWARE BY OTHERS
Greenheck Roof Curb
Greenheck Roof Curb
Install 3/8 inch (9.525 mm) SS lag or thru-bolt with
1 inch (25.4 mm) O.D. washer
2.5 inch (63.5 mm) maximum spacing from curb corners
4.5 inch (114.3 mm) maximum bolt spacing
3.5 inch (88.9 mm) minimum tread engagement,
not including tapered tip
2 inch (50.8 mm) minimum edge distance,
centered in flange
Pre-drill holes 40-60% of lag diameter
ALL HARDWARE BY OTHERS
STEEL CONCRETE
WOOD
A A
WOODEN STRUCTURAL SUPPORT
(BY OTHERS, SEE NOTE ABOVE)
Greenheck Roof Curb
Install 3/8 inch (9.525 mm) SS lag or thru-bolt with
1 inch (25.4 mm) O.D. washer
2.5 inch (63.5 mm) maximum spacing from curb corners
4.5 inch (114.3 mm) maximum bolt spacing
3.5 inch (88.9 mm) minimum tread engagement,
not including tapered tip
2 inch (50.8 mm) minimum edge distance,
centered in flange
Pre-drill holes 40-60% of lag diameter
ALL HARDWARE BY OTHERS
WOOD
Vektor-MS Assembly View - Direct Drive
Belt and direct drive units share similar system
components and assembly configuration.
SAVVE Nozzle
Blower Housing
NOTE
Steel, concrete or wood roof support is per structural
engineer and in accordance with load requirements
and applicable building codes.
Refer to stand-alone Vektor Roof Curb Assembly
Instruction found on greenheck.com within the
Laboratory Exhaust section. Chose applicable product
model.
The figures illustrates three common methods used to
install Vektor systems. Methods used to attach a Vektor
unit are dependent on local codes, roof construction
design and roof construction materials. Consult an
architect or structural engineer for proper means of
attachment.
Bypass Air Plenum
Roof Curb or
Structural Support
Isolation Damper
Blower Housing
Access Door
Isolation Damper
Actuator Cover
Panel
Lifting
Lugs
Weatherhood
with Birdscreen
Access Panel
Bolted / Gasketed
(all sides)
Bypass Damper
Actuator Access Door
Roof Curb and Mounting Details
Steel
Continuous weld or stitch weld.
Minimum 6 inch (152.4 mm) stitch weld by
3.25 inch (82.5 mm) spacing minimum.
Minimum 6 inch (152.4 mm) weld on each corner.
OR
Install 5/16 inch (7.9375 mm) 24 Dril-Flex® Self-Drilling
Tapping Screws. 3/16 inch (4.7625 mm) minimum thread
engagement into A36 steel, centered in flange.
4.5 inch (114.3 mm) spacing
5/8 inch (15.875 mm) minimum edge distance
ALL HARDWARE BY OTHERS
STEEL STRUCTURAL SUPPORT
(BY OTHERS, SEE NOTE ABOVE)
Greenheck Roof Curb
Concrete
Greenheck Roof Curb
Install 3/8 inch (9.525 mm) SS power wedge bolts
2.5 inch (63.5 mm) maximum spacing from curb corners
4.5 inch (114.3 mm) maximum bolt spacing
3.5 inch (88.9 mm) minimum embedment
4.5 inch (114.3 mm) minimum edge
distance centered in flange
ALL HARDWARE BY OTHERS
CONCRETE STRUCTURAL SUPPORT
(BY OTHERS, SEE NOTE ABOVE)
Wood
Install 3/8 inch (9.525 mm) SS lag or thru-bolt with
1 inch (25.4 mm) O.D. washer
2.5 inch (63.5 mm) maximum spacing from curb corners
4.5 inch (114.3 mm) maximum bolt spacing
3.5 inch (88.9 mm) minimum tread engagement,
not including tapered tip
2 inch (50.8 mm) minimum edge distance,
centered in flange
Pre-drill holes 40-60% of lag diameter
ALL HARDWARE BY OTHERS
WOODEN STRUCTURAL SUPPORT
(BY OTHERS, SEE NOTE ABOVE)
Greenheck Roof Curb
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Laboratory Exhaust Systems
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Page 6
Bypass Air Plenum - Rigging,
Each plenum section has four (4) lifting points.Each plenum section has four (4) lifting points.
Plenum is lifted by using all lifting points on
Plenum is lifted by using all lifting points on
all plenum sections.
all plenum sections.
Lifting PointsLifting Points
Each plenum section has four (4) lifting points.Each plenum section has four (4) lifting points.
Plenum is lifted by using all lifting points on
Plenum is lifted by using all lifting points on
all plenum sections.
all plenum sections.
Lifting PointsLifting Points
Lifting and Installation
Prior to lifting any components, verify the weights on
the project submittal drawings for each component
or contact factory. Do not lift weights beyond the
capacities of the on-site lifting equipment. Proper
handling of the equipment is critical to avoid damage to
the unit.
Prior to setting the bypass air plenum (BAP), secure
1/4-inch thick by 3/4-inch wide EPDM gasket (provided)
around the perimeter of the roof curb top edge, if
mounting on a roof curb.
Bypass Air Plenum - Rigging and Lifting
Each section
will have four
(4) lifting points.
All lifting points
must be used
when lifting.
Spreader bars
of sufficient
length need to be used to
prevent damage to BAP walls and
components mounted to the BAP.
1. Always use all lifting lugs provided by
manufacturer. Lifting lugs are located around the
perimeter of each section.
2. A spreader bar must be used when lifting each
section to distribute the weight evenly and to
prevent the unit from being over-torqued. Avoid
unnecessary jarring or rough handling.
Chains
Spreader Bar
Bypass Air Plenum Installation
Bypass air plenums (BAP) are delivered fully assembled
unless shipping restrictions require multiple sections.
If delivered in sections, all materials required to join
plenum sections together are provided.
Bypass air plenums are modular in construction and can
be disassembled to provide allowances for lower on-site
lifting capacities. Plenum sections are joined using
stainless steel fasteners. These are removed to separate
sections for lifting purposes. Save hardware as these
will be required to join the BAP sections together again.
If moving separate sections onto a roof curb or support
structure, each section should be joined to its mating
section after moving into position and before lifting any
additional section(s) into position.
Steps for joining multiple BAP sections together:
1. Lift / place first BAP section making sure that
mounting holes are positioned with curb mounting
holes or to structure BAP will be secured.
2. Attached provided gasket to plenum section using
the pattern shown in the image.
3. Ensure bolts are removed from both mating
sections to being joined together. Plenum will ship
with hardware in one section’s bolt holes or were
removed to disassemble BAP to reduce lifting load.
4. Lift / place next section into position using similar
lifting procedure.
5. Align holes between two mating sections.
6. Use fasteners (provided) to join the two sections
together, this will involve utilizing the nutserts in
each section on the inside perimeter. The fasteners
are tightened until the sections are pulled together
and the gasket material is compressed.
7. Caulk joint (provided) on the top and two sides
between sections for enhanced water protection.
8. Repeat steps 1 – 7 until all plenum sections are
lifted and joined together.
Any side panels removed to gain access to the interior
of the plenum should be reattached.
Plenums may be single sections or up to six in length
Two fan bypass air plenum shown.
3. Care must be taken to keep the unit in the upright
position during rigging.
4. Care must be taken to not damage the watertight
seams in the unit casing.
5. Avoid damage to the curb and curb gasketing when
rigging onto a curb.
6. Only use trained professional riggers when moving
equipment.
Laboratory Exhaust Systems
6
Plenum Section
Gasket Material
each plenum section
Bolt Holes
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Page 7
Securing the Bypass Air Plenum
After bypass air plenum (BAP) has been lifted into
position, plenum should be secured to roof curb,
structural steel or concrete pad. Bottom of the BAP
has a removable skirt section with pre-punched holes.
These holes will align with holes and nutserts in the roof
curb if the roof curb was provided by Greenheck. If the
roof curb is from another supplier use the holes in the
skirt as a template.
Allow gasketing to compress before securing. When
securing BAP to curb install using moly-coated 316
stainless steel screws (provided) in all holes.
If BAP is not being mounted on a roof curb, it can
be secured to either structural steel or concrete pad.
Full perimeter and cross support under the BAP is
required. Method used to secure the BAP to either
structural support(s) or concrete pad is determined by
site or structural engineer. If BAP is welded to support
structure repair the area where coating was burnt off.
See coatings repair section of this manual for details
involving touch-up of damaged surfaces.
Fans – Rigging, Lifting and
Installation
CAUTION
Fans should never be lifted by the shaft, motor, motor
cover or accessories.
Prior to setting fan(s) on plenum, place 1/4-inch thick
x 3/4-inch wide EPDM gasket around the perimeter of
top edge of BAP where fans mount, adhesive side down
(gasket provided).
Fans - Rigging and Lifting
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.
Vektor-MD fans size 40 and larger and all MH and MS
fans are shipped with the nozzle separate from the main
housing. For these sizes the nozzle should be lifted
separate from the fan. For MD models with the nozzle
attached the main fan housing can be lifted using the
brackets on the nozzle.
• Use standard lifting and rigging practices.
• ALL lifting lugs (brackets) on each component must
be utilized at the same time.
• Fan to be kept level during lifting and installation.
Vektor MD - sizes 36 and smaller
Lifting Brackets
Vektor MD - sizes 40 and greater
Vektor MH and MS - all sizes
Lifting Lugs
Motor Cover
Lifting Lug
Fan Housing Installation
Lower Vektor fan housing into place. Allow gasket to
become compressed before securing to plenum.
Install moly-coated 316 stainless steel screws (provided)
in all holes in plenum cap.
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Laboratory Exhaust Systems
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Page 8
Nozzle and Windband Lifting and Installation
Lifting
Lug
Windband
Windband
Support Brackets
• Vektor MD-36 and smaller, attached to fan
• Vektor MD-40 and greater, shipped loose
NozzleNozzle
Lifting
Lug
Lifting
Lug
for Vektor-MD
Lifting
Lug
Windband
Lifting
Lug
Support Brackets
Windband
Nozzle Lifting and Installation for Vektor-MH
Using the nozzle lifting lugs, place
nozzle over blower discharge,
aligning support bracket holes with
bolt holes in blower housing. Attach
nozzle to blower discharge using
moly-coated 316 stainless steel
bolts and nuts provided through the
flange.
NozzleNozzle
Vektor MD - sizes 36 and smaller, nozzle is attached to the
fan housing
• Vektor MD-36 and smaller, attached to fan
• Vektor MD-40 and greater, shipped loose
Using the windband lifting lugs, lift and place over
the nozzle attached to the fan housing discharge. The
windband has support brackets welded around the
interior perimeter. Align the windband support bracket
bolt holes with the bolt holes in the nozzle. Using the
provided moly-coated 316 stainless steel bolts and
nuts, securely attach these pieces together.
Vektor MD - sizes 40 and greater, windband and nozzle
ship as individual pieces
Using the nozzle lifting brackets, lift and place over
the fan discharge. Secure nozzle
using moly-coated stainless steel
Windband
hardware (provided). Align support
bracket holes with bolt holes in the
nozzle. Attach windband using the
provided moly-coated 316 stainless
steel bolts through the support
Nozzle
Nozzle
brackets welded to the inside of the
windband.
Silencer and Stack Extension Lifting and
Installation for Vektor-MH / Vektor-MD
Nozzle Lifting and Installation for Vektor-MS
Using the nozzle lifting lugs, place nozzle over blower
discharge, aligning support bracket holes with bolt holes
in blower housing.
Attach nozzle to
blower discharge
using moly-coated
Lifting
Lugs
316 stainless steel
bolts and nuts
provided through
the flange.
Weatherhood Installation
Shipping constraints may require weatherhoods to be
delivered separate from the BAP. The weatherhood bolt
hole pattern matches the side panel bolt pattern. Use
supplied hardware to secure the weatherhood to the
BAP over the bypass air damper.
Lifting
Points
Systems supplied with inline discharge silencers always
have the nozzle section ship separate. The silencer is
installed between the fan housing and nozzle.
Lift the silencer with provided lifting points. When
systems are supplied with silencers, guy wires or
independent supports are recommended (by others).
Refer to project specific submittal drawings for details.
Laboratory Exhaust Systems
8
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Page 9
Duct Connections to the Bypass Air
RECOMMENDED DRAIN TRAP DESIGN
(TRAP BY OTHERS)
ENERGY RECOVERY
PLENUM
SUBFLOOR
SUBFLOOR
1.25 NPT
.75 NPT
*BASED ON STANDARD
VEKTOR ERS CURB HEIGHTS
*
*
ROOF
CURB
P.O.BOX 410 SCHOFIELD, WISCONSIN 54476-0410
TITLE
DRAWN BY
ECO
B
ENG. REF.
DATE
SUPERSEDES
SCALE
CAD DRAWING NO.
FAUST
06/29/2009
1/8
VK-ERS
Note: A conservation method of trap design is to set
N = TSP and P = TSP (TSP = Total Static Pressure)
NEGATIVE PRESSURE TRAP
14.750
14.000
NOTE: INSULATION OR OTHER MEANS
OF FREEZE PROTECTION MAY BE
REQUIRED IN CERTAIN CLIMATES
ERS DRAIN SUBMITTAL
(TRAP BY OTHERS)
ENERGY RECOVERY
PLENUM
SUBFLOOR
1.25 NPT
.75 NPT
*BASED ON STANDARD
VEKTOR ERS CURB HEIGHTS
*
*
ROOF
CURB
P.O.BOX 410 SCHOFIELD, WISCONSIN 54476-0410
TITLE
DRAWN BY
ECO
B
ENG. REF.
DATE
SUPERSEDES
SCALE
CAD DRAWING NO.
FAUST
06/29/2009
1/8
VK-ERS
N = Negative fan pressure (inches W.C.)
H = N - 0.5 inches minimum
H/2
H/2
H
1.25 inch minimum
N
FAN ON
FAN OFF
14.750
14.000
NOTE: INSULATION OR OTHER MEANS
OF FREEZE PROTECTION MAY BE
REQUIRED IN CERTAIN CLIMATES
RECOMMENDED DRAIN TRAP DESIGN
(TRAP BY OTHERS)
NOTE: A conservative method of trap design is to set
N = Total Static Pressure and P = Total Static Pressure
POSITIVE PRESSURE TRAP
ERS DRAIN SUBMITTAL
Plenum (BAP)
Connecting primary inlet exhaust air ducts is allowed
through the roof curb or through one or more of the
side access panels. To reduce the potential for system
effects in the plenum, the duct connection should be
sized to have no more than a maximum air velocity of
1500 fpm when entering. When attaching ductwork
to the plenum, care should be taken to ensure a
tight fit and proper seal to prevent leakage from the
contaminated airstream.
Side Inlet Duct Connections
Ductwork that has a different size than the removable
access panel(s) can either have a transition to the
plenum’s opening size or the access panel can be
field modified by cutting an opening to the size of the
ductwork.
Bottom Inlet Duct Connections
Bottom inlet duct connects should be made by
attaching the duct to the inside panel edge of the
plenum. Ducting to multiple fan plenums may either
be split below the roof level and connected to duct
drops from the inside the plenum or having the ducting
notched for fitting around roof curb and plenum cross
support members.
Bolt-On
Mounting
Skirt
Gasket/Seal
(by others)
Plenum bottom section view for single fan system.
Repeated for multiple fan plenums.
Duct connections are to be sealed from air leakage and
water penetration.
Duct Drop
(by others)
Flanged
Bottom Inlet
Roof Curb or
Structure
Plenum Drainage Piping / Trap
Detail (By Others)
There is a location for a pipe connection on each tubular
fan housing and bypass air plenum. Each drain may
need to be connected to a drainage system to ensure
proper disposal of any water or condensate that may
occur.
• Drain connections are 0.5 inch FNPT and
1.0 inch MNPT
• Installed piping to have a downward angle to allow
for drainage
• Fill traps to recommended level before start-up
Note: A conservative method of trap design is to set N
Positive Pressure Trap on Tubular Fan
Housing
Connect
this end
to fan drain.
N = Negative fan pressure (inches W.C.)
H = N - 0.5 inches minimum)
Negative Pressure Trap on Bypass Air
Plenum
Fan Drain
Connection
= total static pressure.
H/2 H/2
H
Plenum Drain
Connection
1.25 inch
minimum
N
FAN ONFAN OFF
1.25 inch minimum
®
N
H
FAN OFF
H/2
H/2
FAN ON
N = Negative fan pressure (inches W.C.)
H = N - 0.5 inches minimum
Check local codes for proper disposal of drain water
which has been in contact with the exhaust air.
Laboratory Exhaust Systems
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Page 10
Bypass Air Plenum (BAP) and
Isolation Damper Access and
Actuator Mounting
Depending on the configuration and intended operation
of the system supplied, every Vektor plenum section
may not have a weatherhood and bypass air damper.
Typically systems that include a fan which is on standby
will have one less weatherhood and BAP damper
assembly than plenum sections. Refer to submittal
drawings for additional information. The appropriate
guard / cover needs to be removed for installation,
inspection and maintenance.
For Vektor fans with weatherhood - Access to the BAP
damper and the isolation damper, actuator(s) (optional
from factory) and voltage transformer (optional from
factory) mounting location, is gained through the
removal of the weatherhood guard / cover. The isolation
damper assembly can be removed from its location by
sliding it through the opening.
For Vektor fans without a weatherhood - A guard / cover
is located on the side of the plenum section. Removal of
the guard / cover gains access to the damper linkages,
actuator (optional from factory) and transformer
(optional from factory). The entire isolation damper
assembly can be removed through this opening.
If the Vektor units were not supplied with optional
actuators, the dampers have an extended jackshaft for
field mounting a customer supplied actuator.
Field Coating Touch-Up Procedure
for Scratched Areas
Standard coating and color for the Vektor laboratory
exhaust system is Greenheck’s LabCoat™. The dark
gray (041) procedure below details the correct method
for repairing minor scratches in the coating.
TOUCH-UP PAINT REPAIR KIT CONTENTS
• One pint of Kem Kromik primer
- including a technical data sheet
• One pint of industrial enamel (041 Dark Gray)
- including a technical data sheet
• Four disposable foam brushes
• One sheet sandpaper
• Repair procedure details
1. Scuff affected area to be repaired using medium
sandpaper (provided) or medium scotch brite pad.
Feather the edges.
2. Clean affected area to be touched up using an
alkaline based cleaner and rinse.
3. Apply Kem Kromik primer using 1 inch foam brush
(provided). Follow technical data sheet instructions.
4. Allow primer to dry a minimum of 2 1/2 hours before
top coating.
5. Apply topcoat with industrial enamel using 1 inch
foam brush (provided). Follow technical data sheets
instructions. Allow painted units to air-dry and cure
before putting into service. See enclosed Technical
Data sheets for detailed drying and cure schedules
at different temperatures.
To order additional coating repair kits please reference
Greenheck’s part number HAZ2203 HI-PRO 041 GRAY
FIELD DAMAGE REPAIR kit. Please contact factory
with your fan’s serial number for colors other than our
standard Dark Gray (041).
Laboratory Exhaust Systems
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Page 11
Electrical Connections
LINE IN
115/208/230/277 volt, single phase
MOTOR
DISCONNECT
115/208/230/277 volt
Single phase
TRANSFORMER
208/230/277 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
115/208/230/277 volt
Single phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
Field Wiring
Factory Wiring
LINE IN
115/208/230/277 volt, single phase
MOTOR
DISCONNECT
115/208/230/277 volt
Single phase
TRANSFORMER
208/230/277 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
115/208/230/277 volt
Single phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
LINE IN
208/230/460/575 volt, three phase
MOTOR
DISCONNECT
208/230/460/575 volt
Three phase
TRANSFORMER
208/230/460/575 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
208/230/460/575 volt
60 cycle, three phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
Field Wiring
Factory Wiring
Field Wiring
Factory Wiring
LINE IN
115/208/230/277 volt, single phase
MOTOR
DISCONNECT
115/208/230/277 volt
Single phase
TRANSFORMER
208/230/277 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
115/208/230/277 volt
Single phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
LINE IN
208/230/460/575 volt, three phase
MOTOR
DISCONNECT
208/230/460/575 volt
Three phase
TRANSFORMER
208/230/460/575 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
208/230/460/575 volt
60 cycle, three phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
LINE IN
208/230/460/575 volt, three phase
MOTOR
DISCONNECT
208/230/460/575 volt
Three phase
VFD
supplied and wired
by others
TRANSFORMER (if required)
208/230/460/575 volt, single phase
Transformers must be wired independent
from VFD control.
24/115 volt, single phase
isolation damper actuator motor
power open/spring close
208/230/460/575 volt
60 cycle, three phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper,
refer to CAPS file selection
Field Wiring
Factory Wiring
Field Wiring
Factory Wiring
Field Wiring
Factory Wiring
Before electrical connections are made, the supply
voltage, phase and ampere capacity must be checked
for compatibility with the fan motor. In addition, the
supply wiring must be properly fused and conform to
local and national electrical codes. If the unit is supplied
with a safety disconnect switch, ensure proper wiring
to the fan motor. Be sure the disconnect is switched to
the “OFF” position before connecting supply wires. If
no disconnect is supplied, ensure the supply wire is not
live before connection. Supply wires are then connected
to the optional safety disconnect switch (if supplied) or
motor.
Vektor-MH and Vektor-MD Motor Disconnect
and Isolation Damper Wiring Diagram
Disconnect is mounted to fan housing. Transformers are
mounted to bypass air plenum with damper actuator
motors. For systems that ship unassembled because
of physical size, this connection at disconnect from
transformers must be field-installed. Wires with conduit
and fittings are provided pre-connected to transformers.
Vektor-MH and Vektor-MD Applications with
Variable Frequency Drives (VFD)
For Vektor systems with single-point, three-phase
wiring per blower, the isolation damper actuator will be
powered via a step-down transformer, which is wired
to the fan disconnect, as shown in the appropriate
diagram.
If fan flow (motor speed) is to be controlled using a
variable frequency drive with this wiring, the reduced
voltage and frequency supplied to the fan will cause
control problems with the isolation damper actuator.
When a project’s Vektor control sequence requires the
use of a VFD, it is suggested that the control contractor
supply the isolation damper actuator voltage —
independent of the power supplied to the Vektor fan
motor.
For Vektor-MS fans refer to the Vektor SAVVE controls
Installation, Operation and Maintenance Manual for
electrical wiring and connection information.
NOTE
DISCONNECT
115/208/230/277 volt
Single phase
DISCONNECT
208/230/460/575 volt
Three phase
DISCONNECT
208/230/460/575 volt
Three phase
DISCONNECT
208/230/460/575 volt
Three phase
Single Phase Layout
LINE IN
115/208/230/277 volt, single phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
MOTOR
115/208/230/277 volt
Single phase
Transformers must be wired independent
isolation damper actuator motor
Three Phase Layout
LINE IN
208/230/460/575 volt, three phase
Disconnect is mounted to fan housing
Optional transformer and isolation damper, refer to CAPS file selection
208/230/460/575 volt, single phase
Transformers must be wired independent
MOTOR
208/230/460/575 volt
60 cycle, three phase
isolation damper actuator motor
Three Phase with
Variable Frequency Drives Layout
LINE IN
208/230/460/575 volt, three phase
VFD
supplied and wired
by others
Disconnect is mounted to fan housing
Optional transformer and isolation damper,
refer to CAPS file selection
TRANSFORMER (if required)
208/230/460/575 volt, single phase
Transformers must be wired independent
MOTOR
208/230/460/575 volt
60 cycle, three phase
isolation damper actuator motor
Three Phase Motor Starter
with Integral Damper Control Layout
LINE IN
208/230/460/575 volt, three phase
Motor Starter
with Intergral
Damper Control
isolation damper actuator motor
Disconnect is mounted
to fan housing
Field Wiring
Factory Wiring
TRANSFORMER
208/230/277 volt, single phase
from VFD control.
24/115 volt, single phase
power open/spring close
Field Wiring
Factory Wiring
TRANSFORMER
from VFD control.
24/115 volt, single phase
power open/spring close
Field Wiring
Factory Wiring
from VFD control.
24/115 volt, single phase
power open/spring close
Field Wiring
Factory Wiring
Optional isolation damper,
refer to CAPS file selection
24/115 volt, single phase
power open/spring close
MOTOR
208/230/460/575 volt
60 cycle, three phase
®
Laboratory Exhaust Systems
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Page 12
Start-Up
WARNING
Disconnect and secure to the OFF position all
electrical power to the fan prior to inspection or
servicing. Failure to comply with this safety precaution
could result in serious injury or death.
Visual Inspection of Equipment
The equipment type and arrangement should be
verified as ordered at once when it arrives at the jobsite.
When a discrepancy is found, the local Greenheck
Fan Corporation Sales Representative must be
notified immediately so that corrective action may
be investigated, also verify electrical conformance
to specifications. Unauthorized alterations and
unauthorized backcharges will not be recognized by
Greenheck Fan Corporation.
After the unit has been assembled, installed and all
utilities have been hooked up, the unit is now ready for
operation.
Check
Before starting the unit, check the following:
1. Confirm that building supply voltage matches the
voltage for which the unit is wired.
2. Check all piping and wiring penetrations made by
contractors for water tightness. All penetrations
must be made watertight to prevent water damage
to the unit and building.
3. Rotate the fan wheel manually to be sure that it is
free to operate. Remove any dirt or debris that may
have accumulated during installation.
4. Check the fan bearing setscrews for tightness.
5. Check alignment of sheaves and V-Belts (See
maintenance section).
6. Inspect all fasteners to ensure that none have
loosened during shipment.
7. Check flex coupling for proper alignment and
connect between motor shaft and fan shaft (direct
drive).
8. Check all guarding to ensure that it is securely
attached and not interfering with rotating parts.
9. Check operation of isolation and bypass dampers (if
supplied) for freedom of movement.
10. Check all electrical connections for proper
attachment.
11. Check housing and ductwork, if accessible, for
obstructions and foreign material that may damage
the fan wheel.
12. Fill drainage piping trap.
Additional steps for initial start-up
1. Check for proper wheel rotation by
momentarily energizing the fan.
Access to view the wheel can
be gained through the blower
housing access panel located
on the side of the fan’s tubular
housing.
One of the most frequently
encountered problems
are motors that are wired
to rotate the wheel in the
wrong direction. This is
especially true with 3-phase
installations where the motor will run in either
direction, depending on how it has been wired. To
reverse rotation of a 3-phase motor, interchange any
two of the three electrical leads. Single phase motors
can be reversed by changing internal connections as
described on the motor label or wiring diagram.
2. Fans with multi-speed motors should be checked on
low speed during initial start-up.
3. Check for unusual noise, vibration or overheating of
bearings. Refer to the “Troubleshooting” section of
this manual if a problem develops.
4. Grease may be forced out of the bearing seals during
initial start-up. This is a normal self-purging feature
for the type of bearing used on this product.
Blower Housing
Access Panel
Direction of
wheel rotation
Airflow
Laboratory Exhaust Systems
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Page 13
Vibration
On start-up and during operation, the unit should
operate smoothly with minimal vibration. It is possible
that a higher degree of vibration may be experienced.
Excessive vibration if left unchecked, can cause a
multitude of problems, including structural and/or
component failure.
1. Wheel Unbalance
2. Drive Pulley Misalignment
3. Incorrect Belt Tension
4. Bearing Misalignment
5. Mechanical Looseness
6. Faulty Belts
7. Drive Component Unbalance
8. Poor Inlet/Outlet Conditions
9. Foundation Stiffness
for corrective actions. If observation cannot locate the
source of vibration, a qualified technician using vibration
analysis equipment should be consulted. If the problem
is wheel unbalance, in-place balancing can be done
through the access panel located on the side of each
fan’s tubular housing. Any correction weights added to
the wheel should be welded to either the wheel back
(single-plane balance) or to the wheel back and wheel
cone (two-plane balance).
The most common
sources of vibration
are listed.
Many of these
conditions can be
discovered by careful
observation. Refer to
the troubleshooting
section of this manual
®
Laboratory Exhaust Systems
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Page 14
Routine Maintenance and
Operation
CAUTION
When performing any service to the fan, disconnect
the electrical supply and secure fan impeller.
Once the unit has been put into operation, a routine
maintenance schedule should be set up to accomplish
the following:
1. Lubrication of bearings and motor.
2. Bypass air dampers should be checked for freedom
of operation and wear.
3. Wheel, housing, bolts and set screws on the entire
fan should be checked for tightness.
4. Any dirt accumulation on the wheel or in the housing
should be removed to prevent unbalance and
possible damage.
5. Inspect fan impeller and housing looking for fatigue,
corrosion, or wear.
Fan Operation
All fans should be run every thirty (30) days, or at least
“bumped” every thirty days. It is preferred that each
fan is run as this causes all electrical and mechanical
components to get up to temperature, displacing any
formed condensation, redistributes load on bearings,
and redistributes grease in the bearings (motor and
shaft bearings).
CAUTION
When operating conditions of the fan are to be
changed (speed, pressure, temperature, etc.), consult
manufacturer to determine if the unit can operate
safely at the new condition.
V-Belt Drive
V-belt drives must be checked on a regular basis
for wear, tension, alignment and dirt accumulation.
Premature or frequent belt failures can be caused by
improper belt tension (either too loose or too tight)
or misaligned sheaves. Abnormally high belt tension
or drive misalignment will cause excessive bearing
loads and may result in failure of the fan and/or motor
bearings. Conversely, loose belts will cause squealing
on start-up, excessive belt flutter, slippage and
overheated sheaves. Either excessively loose or tight
belts may cause fan vibration.
When replacing V-belts on multiple groove drives all
belts should be changed to provide uniform drive
loading. Use a set of matched belts whenever possible.
Do not pry belts on or off the sheave. Loosen belt
tension until belts can be removed by simply lifting the
belts off the sheaves. After replacing belts, ensure that
slack in each belt is on the same side of the drive. Belt
dressing should never be used.
Do not install new belts on worn sheaves. If the sheaves
have grooves worn in them, they must be replaced
before new belts are installed.
The proper tension for operating a V-belt drive is
the lowest tension at which the belts will not slip at
peak load conditions. Belts are adjusted by raising or
lowering the motor pivot plate. For initial tensioning, the
proper belt deflection halfway between sheave centers
is 1/64 inch for
each inch of belt
Deflection =
Belt Span
64
span. For example,
if the belt span is
64 inches, the belt
deflection should
be 1 inch using
moderate thumb
pressure at mid-
Belt Span
point of the drive.
Check belt tension two times during the first
24hours of operation and periodically thereafter.
Motors
Motor maintenance is generally limited to cleaning
and lubrication. Cleaning should be limited to exterior
surfaces only. Removing dust and grease buildup on
the motor housing assists proper motor cooling. Never
wash-down motor with high pressure spray.
Greasing of motors is only intended when fittings are
provided. Many fractional motors are permanently
lubricated for life and require no further lubrication.
Motors supplied with grease fittings should be
greased in accordance with the manufacturer’s
recommendations. When motor temperature does not
exceed 104ºF (40ºC), the grease should be replaced
after 2000 hours of running time.
Direct drive systems have extended grease lines to
lubricate the motor without removal of any guarding.
Laboratory Exhaust Systems
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Page 15
Bearings
MOTOR
FAN
MOTOR
The bearings for Greenheck fans are carefully selected
to match the maximum load and operating conditions
of the specific class, arrangement, and fan size. The
instructions provided in this manual and those provided
by the bearing manufacturer will minimize any bearing
problems. Bearings are the most critical moving part
of the fan, therefore, special care is required when
mounting them on the unit and maintaining them.
Refer to the following chart and the manufacturer’s
instructions for grease types and intervals for various
operating conditions. Never mix greases made with
different bases. This will cause a breakdown of the
grease and possible failure of the bearing.
Recommended Bearing Lubrication Schedule
Relubrication Schedule in Months*
Synthetic Grease
Fan
RPM
To 250 12 12 12 12 12 12 12 12
500 12 12 12 12 12 12 12 12
750 12 12 12 12 12 12 10 7
1000 12 12 12 12 12 9 6 4
1250 12 12 12 12 9 6 4 2
1500 12 12 12 10 7 4 2
2000 12 10 8 6 3 1.5 .5
2500 12 7 5 4 1 .5
3000 12 5 3 2 .5
3500 12 3 2 .75
4000 12 2 .5
5000 12 1
Number
of shots**
1
⁄2 - 111⁄8 -
11⁄2
4 8 8 10 16 25 41 57
* Lubrication interval is based on 12 hour day operation and
maximum 160˚F housing temperature. For 24 hour per day
operation, the interval should be cut in half.
** Lubricant should be added with the shaft rotating and
until clean grease is seen purging from the bearing. The
lubrication interval may be modified based on the condition
of the purged grease. If bearing is not visible to observe
purged grease, lubricate with number of shots indicated for
bore size.
• For conditions including high temperatures, moisture, dirt
or excessive vibration, consult the factory for a specific
lubrication interval for your application.
• Lubricant should be a high quality lithium complex synthetic
grease conforming to NLGI Grade 2. Factory recommends
synthetic Mobilith SHC100.
• The use of non-synthetic lubricants will decrease lubrication
intervals by approximately three times.
• Storage periods of three months or longer require monthly
rotation of the shaft and purging grease prior to storage and
start-up.
Bearing Bore (inches)
15⁄8 -
115⁄16 -
17⁄8
23⁄16
27⁄16
- 3
33⁄16 -
31⁄2
315⁄16 -
41⁄2
415⁄16 -
51⁄2
V-Belt Drive Installation
Belt Drive
1. Remove the protective coating from the end of the
fan shaft using mineral spirits or another similar
solvent. Check to ensure that the shaft is free of
nicks and burrs.
2. Slide sheaves on shafts - do not drive
sheaves on as this may result in
bearing damage.
3. Align fan and motor sheaves
with a straight-edge or
string and tighten.
4. Place belts over sheaves.
Do not pry or force belts,
as this could result in
damage to the cords in
the belts.
5. Adjust the tension until the belts appear snug. Run
the unit for a few minutes and allow the belts to
“Set” properly.
6. With the fan off and disconnect locked out, adjust
the belt tension by moving the motor pivot plate.
When in operation, the tight side of the belts should
be in a straight line from sheave to sheave with a
slight bow on the slack side.
Aligning Sheaves with
a Straight Edge
Vektor-MS Nozzle Bearings
The bearings for the MS nozzle assembly are
permanently lubricated and do not require additional
grease.
®
Laboratory Exhaust Systems
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Page 16
Bearing Replacement
The intent of this Vektor fan design with its large side
access openings is to allow a field service technician
to replace bearings with the fan remaining in place in
its intended application. All work can be conducted
by accessing the bearings through the blower housing
side access openings. This procedure assumes power
source has been locked out prior to removing guards
and covers, belts and pulleys have been loosened and
removed properly and extended lubrication lines have
been disconnected at the bearing. In some cases it may
be necessary to remove the motor and mounting plate.
It may also be necessary to remove the fan inlet cone
and wheel if the bearings cannot be removed due to
corrosion or damage. See Radial Gap and Alignment
section to realign wheel upon installation.
Belt Drive
This procedure assumes proper safety measures have
been taken and the driven sheaves and belts have
already been removed. Shaft black coating can be
removed with a solvent similar to brake cleaner. Read
through these directions completely prior to starting this
procedure.
1. Scribe line at the top of both the top and bottom
bearings. These marks are used to locate the proper
mounting position for the new bearings
2. Loosen and remove top bearing from fan shaft. Use
spanner wrench or blunt punch to loosen bearing.
finish removing bottom bearing.
7. Install new bottom bearing in reverse of this
procedure. Remember to re-install top set of shaft
collars prior to removing lower shaft collars.
8. Align the top of the bearing with the scribed mark
indicating the correct mounting location. Secure
lower bearing to bottom support plate. Do not
secure the bearing to the fan shaft.
9. Turn the wheel approximately 20 – 30 rotations
to allow the shaft to properly set in the bottom
bearing.
10. Finish installing bearing on fan shaft according
to bearing manufacturer’s installation procedure.
Rotate the wheel again for 20 rotations. If resistance
is felt the bearing did not set properly. Reset the
shaft in the bearing.
11. Remove top set of shaft collars and install top
bearing according to bearing manufacturer’s
instructions making sure the top of the bearing
lines up with scribed mark indicating the correct
mounting location.
12. Connect extended lube lines to new bearings. Zerk
fittings from old bearings may need to be installed
in replacement bearings
13. Reinstall drive sheave and belts. Check for
alignment.
14. Caulk around bottom bearing flange for an
improved water tight seal.
EQUIPMENT REQUIRED
• Four shaft collars
• Emery cloth
• Caulk
• Replacement bearings
• Spanner wrench and sockets
Follow bearing manufacturer’s instructions on
removal. An emery cloth may be required to clean
and remove burrs off shaft. Finish removing top
bearing.
3. Install two shaft
collars flush with
the top support
plate to hold and
support the shaft
when removing
bottom bearing.
4. Loosen bottom
bearing. Caulk
seal may need
to be broken
around perimeter
of flange housing and bottom support plate. Use
emery cloth to clean shaft and remove any burrs.
5. Install second set of shaft collars flush with top of
bottom support plate.
6. Remove shaft collars on top support plate and
Top
Bearing
Support
Plate
Bottom
Bearing
Direct Drive
This procedure assumes proper safety measures have
been taken and power locked out prior working on fan
shaft / motor assembly. Shaft black coating can be
removed with a solvent similar to brake cleaner. Read
through these directions completely prior to starting this
procedure.
EQUIPMENT REQUIRED
• Blocking materials
• Emery cloth
• Caulk
• Replacement bearing
• Spanner wrench and sockets
1. Scribe line at the top of the shaft bearing and
also under the lower coupling halve on the fan
shaft. These marks are used to locate the proper
mounting positions when reassembling the fan.
2. Open side access panel and place blocking
materials under wheel to prevent it from shifting
down during bearing replacement.
Laboratory Exhaust Systems
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Page 17
3. Remove coupling
assembly from
fan shaft. Upper
coupling bushing
may need to be
Coupling
removed and /
or motor might
also need to be
tilted to remove
Shaft
Bearing
old bearing
and install new
bearing. Coupling
mounting locations should be scribed on any
component loosened or removed.
4. Loosen and remove bearing from fan shaft. Follow
bearing manufacturer’s instructions on removal.
Caulk seal may need to be broken around perimeter
of flange housing and bottom support plate. Use an
emery cloth to clean and remove any burrs on fan
shaft.
5. Slide new bearing onto fan shaft, but do not tighten
to fan shaft
6. Reinstall coupling bushings and flex pack to
fan shaft and motor shaft. This should be done
according to manufacturer’s instructions making
sure the components line up with scribed mark(s)
indicating the correct mounting location.
7. Remove blocking from under fan wheel.
8. Turn the wheel approximately 20 – 30 rotations to
allow the shaft to properly set in the bearing and
alignment between motor shaft and fan shaft.
9. Finish installing bearing on fan shaft according
to bearing manufacturer’s installation procedure.
Rotate the wheel again for 20 rotations. If resistance
is felt the bearing did not set properly. Reset the
shaft in the bearing.
10. Connect extended lube lines to new bearings. Zerk
fittings from old bearings may need to be installed
in replacement bearings. Purge non-synthetic
grease from new bearing.
11. Caulk around bottom bearing flange for an
improved water tight seal.
Jib Crane Assembly
(Optional Accessory)
NOTE
Complete assembly instructions for the jib crane are
documented in Assembly Instruction #472081, Jib
Crane for Vektor. Instructions are shipped with the jib
crane or can be found on greenheck.com
The jib crane is mounted
to sockets provided on
the plenum housing.
When assembling the jib
crane, use the socket
closest to the fan
which is to be serviced
(multiple sockets are on
plenums consisting of
three or more fans). Jib
crane is designed to
lift windband and
motor only. Any
other use may
result in serious
injury. Jib crane
must not be
used to lift the
fan from the
plenum.
®
Laboratory Exhaust Systems
17
Page 18
Motor Change-Out Procedure
Direct Drive
To remove the motor:
1. Install jib crane* in plenum mounting socket using
Greenheck supplied hardware.
2. Position jib crane boom above windband.
3. Utilizing windband lifting lugs, rig windband to jib
crane cable.
4. Remove all bolts used to secure windband to
nozzle.
5. Lift off windband and lower to rooftop.
6. Reposition jib crane boom above fan.
7. Lower jib crane cable through center of fan until it
reaches the motor.
8. Remove bolts securing the motor to its horizontal
mounting plate.
9. Decouple motor shaft from wheel shaft by
disassembling coupling.
10. Rig motor to jib crane cable.
11. Lift motor out of fan body and lower to rooftop.
To install the new motor:
1. Rig new motor to jib crane cable.
2. Attach coupling half to motor shaft. Make sure
coupling hub is flush with the end of the motor
shaft.
3. Position motor above fan body and carefully lower
to its intended mounting position.
4. Ensure motor is positioned correctly so mounting
bolts can be re-installed.
5. Install all coupling bolts to attach the motor shaft to
the fan wheel shaft.
6. Install all bolts to attach motor to fan body
mounting plate.
The Vektor fan was designed to ensure that when the
new motor is installed, the relative angular alignment
of the motor shaft to fan wheel shaft will be within
+/-1degree.
*If jib crane was not supplied with the Vektor system, a
portable crane or hoist can be used.
High Strength Metal Disc Coupling
Installation and Alignment
Direct Drive
Check for misalignment between the two coupling
hubs. The three types of misalignment (parallel, angular,
and separation gap) are illustrated below. To minimize
misalignment between the hubs, a straight edge can be
used as a quick guide in aligning the shafts.
The Vektor direct drive
single shaft bearing permits
the shaft to swivel and
essentially eliminates parallel
misalignment.
But an excessive angle in
the fan shaft will cause a
higher degree of angular
misalignment. It is best to have
the motor shaft and fan shaft
as close to parallel as possible.
The coupling provided allows
up to one degree of angular
misalignment between the two
joining hubs. No lubrication of
the coupling is required.
Refer to the coupling
manufacturer’s information / installation instruction
sheet provided with the fan for additional details.
Coupling should not be installed to support the weight
of the fan shaft and wheel.
Parallel
Angular
Separation
Radial Gap and Alignment
Efficient fan performance can be maintained by having
the correct radial gap and alignment. These items
should be checked before start-up when the unit has
been disassembled.
Straight Edge
Wheel Cone
Laboratory Exhaust Systems
18
Radial Gap
Inlet Cone
Radial Gap: Adjust inlet cone position such that the
radial gap between the wheel cone and inlet cone is
evenly distributed around the wheel.
Alignment: If necessary, adjust wheel position by
loosening the wheel hub from the fan shaft so that a
straight edge held tight to the wheel cone just touches
the inlet cone.
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Page 19
Troubleshooting
Problem Cause Corrective Action
Adjust wheel and/or inlet cone.
Tighten wheel hub or bearing collars on shaft.
Tighten sheaves on motor/fan shaft. Adjust belt tension.
Align sheaves properly (see procedure).
Replace worn belts or sheaves.
Replace defective bearing(s). Lubricate bearings.
Tighten collars and fasteners.
Check wheel for correct rotation. Check blade position of
BAP damper, increase fan speed.*
Increase BAP damper blade open position. Resize
ductwork. Access door, filters, dampers not installed.
Remove obstructions in system. Use correction factor to
adjust for temperature/altitude. Adjust set point used to
control BAP damper modulation. Resize ductwork. Clean
filters/coils. Change fan speed.*
Resize ductwork. Check proper operation of isolation and
bypass dampers. Check filters and access doors.
Check fuses/circuit breakers. Check for switches turned
off or disconnected. Check for correct supply voltage.
Assure motor is correct horsepower and not tripping
overload protector.
Replace damaged bearing. Relieve excessive belt tension.
Align bearings. Check for bent shaft.
Adjust tightness of belts. Replacement belts should be a
matched set.
Check alignment of shaft, motor and pulleys. Adjustable
pitch pulleys with motors over 15 hp are especially
prone to unbalance. Check wheel balance, rebalance if
necessary.
Excessive
Noise
Low CFM
High CFM
Static Pressure Wrong
High Motor Amp Draw
Fan Doesn’t Operate
Overheated Bearing
Excessive Vibration
Wheel Rubbing Inlet
V-Belt Drive
Bearings
Wheel Unbalance Clean all dirt off wheel. Check wheel balance.
Fan
Duct System Higher pressure than design. Filters need replacement.
Fan Decrease fan speed.
Duct System
Duct system has more
or less restriction than
anticipated
Fan Check rotation of wheel. Reduce fan speed.
Duct System
Electrical Supply
Drive Check for broken belts. Tighten loose pulleys.
Motor
Lubrication Check for excessive or insufficient grease in the bearing.
Mechanical
Belts
System Unbalance
* AIways check motor amps and compare to nameplate rating. Excessive fan speed may overload the motor and
result in motor failure. Do not exceed the maximum cataloged rpm of the fan.
®
Laboratory Exhaust Systems
19
Page 20
DESCRIPTION
QTY
ITEM
TRANSITION WELD2
1
TRANSITION SIDE COVER22
WIND WRAP ROUND23
WIND WRAP FLAT2
4
FRAME BOTTOM BAR25
FRAME TOP BAR26
FRAME WELD2
7
BLADE WELD28
ACTUATOR MOUNT2*9
LIFT LUG
4
10
ACTUATOR COVER2*
11
BLADE SEAL RIGHT212
BLADE SEAL LEFT613
FLEX BACKING
414
VEKTOR BACKING215
ACTUATOR2*16
ELECTRICAL BOX
1
17
BEARING
4
18
BLADE SEAL
4
19
FLEX SEAL220
*Quantity 1 for sizes 9 thru 13
Quantity 2 for sizes 16 thru 36
September 2013 -
Dan Jore instructed to use the Vektor-HS Nozzle Drawing for the Vektor-MS Installation Instruction.
Changed item 9, 11, and 16 quantity from 1 or 2 to 2 or 4
Vektor-MS Nozzle Parts and Assembly
7
3
4
15
18
16
17
11
1
10
6
13
8
12
19
14
20
5
9
2
Item Quantity Description
1 2 Transition Weld
2 2 Transition side cover
3 2 Wind wrap round
4 2 Wind wrap flat
5 2 Frame bottom bar
6 2 Frame top bar
7 2 Frame weld
8 2 Blade weld
9 2 or 4* Actuator mount
10 4 Lifting lug
11 2 or 4* Actuator cover
12 2 Blade seal, right
13 6 Blade seal, left
14 4 Flex backing
15 2 Vektor backing
16 2 or 4* Actuator
17 1 Electrical box
18 4 Bearing
19 4 Blade seal
20 2 Flex seal
* Quantity 2 for sizes 15 thru 24
Quantity 4 for sizes 27 thru 40
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the
Library under Warranties.
Greenheck Vektor MD and MH catalog provides additional
information describing the equipment, fan performance,
available accessories, and specification data.
®
Phone: 715.359.6171 • Fax: 715.355.2399 • Parts: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
464652 • Vektor-MH, MD and MS, Rev. 5, October 2013 Copyright 2013 © Greenheck Fan Corporation
20
AMCA Publication 410-96, Safety Practices for Users and
Installers of Industrial and Commercial Fans, provides
additional safety information. This publication can be obtained
from AMCA International, Inc. at www.amca.org.
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