Page 1
READ AND SAVE THESE INSTRUCTIONS
Part #469003
®
Model Vektor™-H
Installation Operation and Maintenance Manual
for Vektor-H Laboratory Exhaust System
Receiving
Greenheck model Vektor-H 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.
Lifting
Lugs
Lifting
Lugs
Single Blower
System
Handling & Installation
The Greenheck Vektor-H laboratory exhaust system is shipped in subassembly sections for easy rigging
and installation. Depending on the options ordered, the sections can include: Roof Curb, Bypass Air Plenum
Assembly, Blower Assembly, Stack Extension, and Discharge Nozzle.
The Vektor-H is designed to be self-supporting and standing (without the use of guy wires) when assembled per
the instructions provided within this manual. The roof curb must be securely fastened to the roof structure in
accordance with the contract documents. All subassembly sections have lifting lugs as shown.
Lifting lugs on each subassembly are designed to handle the weight of the subassembly section only.
Do not attempt to lift the entire system as a complete assembly.
Single Blower System with
Bypass Air Plenum
NOTE!
Multiple Fan System with
Bypass Air Plenums
Page 2
NOTE!
Be sure to rig each section separately using the lifting lugs provided.
Installation Instructions
Note: When installing each section, be sure to rig each piece
separately using the lifting lugs provided.
1. Mount roof curb to roof deck in accordance with local codes.
2. Install 3/16-inch thick x 1/2-inch wide, closed-cell neoprene gasket
on the top edge of the curb, adhesive side down (gasket provided).
Leave no gaps between gasket sections to ensure tight seal.
3. Place the bypass air plenum (BAP) onto the previously installed
gasket and secured roof curb. If a BAP is not provided for the unit,
skip to Step 5. Pre-drill pilot holes into the roof curb and attach
the BAP to the roof curb using the provided 5/16-inch self-tapping
screws. Screw fasteners are to be installed in all pre-punched curb
holes.
4. Install 3/16-inch thick x 1/2-inch wide, closed-cell neoprene gasket
on the top edge of BAP, adhesive side down (gasket provided).
Leave no gaps between gasket sections to ensure a tight seal.
5. Place the curb cap of the fan housing onto the gasket and BAP
(onto roof curb if BAP is not provided). Attach the curb cap
using the provided 5/16-inch self-tapping screws. If a BAP is not
provided, pilot holes must be drilled into the roof curb.
6. Install the final nozzle subassemblies as shown in the submittal
drawing. Align flange bolt holes and fasten sections using the 316
stainless steel bolts, washers, and lock washers provided.
7. Follow electrical connection and pre-start-up checks as listed on
page 3.
Bolt / Washer
Detail
5/16 in.
Self-tapping
Screws
Neoprene
Gasket
Duct Connection to Curb
The end of the customer supplied duct is secured between the roof curb’s top edge and the curb cap of either
the Vektor-H or bypass air plenum. If an isolation damper is present in the roof curb, the duct is located between
the roof curb and the damper adapter tray.
Vektor-H
Vektor-H or
bypass air
plenum
Vektor-H with or without by-
pass air plenum & no isolation
damper in roof curb
Vektor-H without bypass
air plenum & with isolation
damper in roof curb
Adapter Tray
Isolation Damper
Duct to Bypass Air Plenum
Vektor-H with Option B - Side Air Intake
Bypass Air Plenum
Laboratory Exhaust Duct
Duct flange and gasketing
by others
Roof Curb
2
®
Page 3
Vektor Installation
The
figures below illustrates four 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.
Weatherhood
w/ birdscreen
(optional)
Bypass Air
Plenum
3/16 in. silicone gasket
3/8 in. bolt
(typical)
(by Greenheck)
Bolt or weld in field
(by others)
(by Greenheck)
Structural Support
(by others)
Fan, Plenum, and Curb to Structural Steel Fan and Plenum (no Curb) to Channel Base
5/16 in. self-tapping screws
(by Greenheck)
5/16 in. bolt
(typical)
(by Greenheck)
Fiberglass
Insulation
Roof Curb
5/16 in. bolt
(typical)
(by Greenheck)
Weatherhood
w/ birdscreen
(optional)
Field drilled and bolted
(by others)
Bypass Air
Plenum
3/16 in. silicone gasket
(by Greenheck)
Structural Support
(by others)
Weatherhood
w/ birdscreen
(optional)
3/8 in. bolt
(typical)
(by Greenheck)
Bolt or weld in field
(by others)
Bypass Air
Plenum
3/16 in. silicone gasket
(by Greenheck)
Exhaust Duct
(by others)
Fiberglass
Insulation
Roof Curb
Roof Line
(Roofing felt & material
by others)
3/8 in. bolt
(typical)
(by Greenheck)
Bolt or weld in field
(by others)
3/16 in. silicone gasket
(by Greenheck)
Exhaust Duct
(by others)
(Roofing felt & material
Fan
Fiberglass
Insulation
Roof Curb
Roof Line
by others)
Fan, Plenum, and Curb to Roof Deck Fan and Curb (no Plenum) to Roof Deck
Plenum Drainage Piping / Trap Detail (By Others)
There are multiple locations for pipe connections, one on each plenum section and another on each tubular fan
housing. Each drain should be properly connected to a drainage system to ensure proper disposal of any water
or condensate that may occur.
• Installed piping to have a downward angle to allow for drainage
• Fill trap to recommended level before start-up
Detail of
Bypass Air
Plenum and
Blower
Housing
1 in. drain coupling in Blower Housing
and Bypass Air Plenum
Y
X
Y Dim > System Pressure
X Dim > 1/2 System Pressure
1 inch of water
*Dimension of X and Y
are inches
3 4
Clean out location
®
Page 4
Electrical Connections
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.
Motor - Disconnect Wiring / Isolation Damper Wiring Diagram
208 / 230 / 460 / 575 V 3 PHASE
DISCONNECT
208 / 230 / 460 / 575 V 3 PHASE
208/230/460/575/60/3
FIELD WIRING
FACTORY WIRING
LINE IN
MOTOR
DISCONNECT IS MOUNTED TO FAN HOUSING. TRANSFORMER IS MOUNTED
TO MIXING BOX (BYPASS AIR PLENUM) WITH DAMPER ACTUATOR MOTOR.
FOR SYSTEMS THAT SHIP UNASSEMBLED BECAUSE OF PHYSICAL SIZE,
THIS CONNECTION AT DISCONNECT FROM TRANSFORMER MUST BE FIELD
INSTALLED. WIRE WITH CONDUIT AND FITTING IS PROVIDED PRE-CONNECTED
TO TRANSFORMER.
OPTIONAL FACTORY
MOUNTED AND WIRED
ISOLATION DAMPER
TRANSFORMER
208 / 230 / 460 / 575 V 1 PHASE
115V 1 PHASE
ISOLATION
DAMPER
ACTUATOR
POWER OPEN/SPRING CLOSE
MOTOR
ACTUATOR
Applications with Variable Frequency Drive (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 diagram
above.
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.
®
Page 5
Pre-Start-Up Checks
1. Check all fasteners for tightness.
2. The wheel should be aligned as shown. Although the wheel position is preset and the unit is test run
at the factory, movement may occur during shipment.
The radial gap should be consistent at all
locations between the centrifugal wheel and
the inlet cone. Centering may be accomplished
by loosening the inlet cone bolts and
repositioning the inlet cone.
To obtain the optimum performance, the
centrifugal wheel must overlap the inlet cone.
Adjustments can be made by loosening the set
Radial Gap
screws in the wheel and moving the wheel to
the desired position.
3. Wheel rotation should be in the same direction as the rotation decal affixed to the unit. For 3-phase
installations, fan rotation can be reversed by simply interchanging any two of the three electrical
leads. For single phase installations, follow the wiring diagram located on the motor.
4. Adjustable motor pulleys are preset at the factory for the specified fan RPM. Fan speed can be
increased by closing or decreased by opening the adjustable pulley. Two or three groove variable
pitch pulleys must be adjusted an equal number of turns open or closed.
Wheel
Overlap
Direction
of Airflow
Inlet Cone
Note: Any increase in fan speed represents a substantial increase in horsepower required from
the motor. Always check motor load amperage and compare to nameplate rating when
changing fan speed.
Maintenance
WARNING
DISCONNECT ALL ELECTRICAL POWER TO THE FAN AND SECURE TO THE “OFF” POSITION
PRIOR TO INSPECTION OR SERVICING. FAILURE TO COMPLY WITH THIS SAFETY
PRECAUTION COULD RESULT IN SERIOUS INJURY OR DEATH.
Once the fan has been put into operation, a periodic maintenance program should be set up to preserve
the reliability and performance of the fan. Items to be included in this program are:
• BEARINGS • SET SCREWS
• BELTS • MOTORS
• FASTENERS • REMOVAL OF DUST/DIRT
Bearings
Bearings are the most critical moving part of the fan and should be inspected at periodic intervals.
Locking collars and set screws, in addition to fasteners attaching the bearing to the bearing plate, must
be checked for tightness. In a clean environment with temperatures above 32º F and below 200º F, fan
shaft bearings with grease fittings should be lubricated semi-annually using a high quality lithium based
grease. If unusual environmental conditions exist such as temperatures below 32º F or above 200º F,
moisture or contaminants, more frequent lubrication is required.
With the unit running, add grease very slowly with a manual grease gun until a slight bead of grease
forms at the seal. Be careful not to unseat the seal by over lubricating or using excessive pressure.
Bearings without grease fittings are lubricated for life.
5
®
Page 6
Belts
Premature belt failures are frequently caused by improper belt tension (either too
Deflection =
Belt Span
64
tight or too loose) or misaligned pulleys. The proper tension for operating a V-belt is
the lowest tension at which the belts will not slip at peak load conditions. For initial
tensioning, the proper belt deflection half-way between pulley centers is 1/64 inch for
each inch of belt span. For example, if the belt span is 64 inches, the belt deflection
should be one inch using moderate thumb pressure at midpoint of the drive.
Belt Span
Check belt tension two times during the first 24 hours of operation and periodically
thereafter. To adjust belt tension, simply loosen four fasteners (two on each side of
the motor plate) and slide the motor plate away from the fan shaft until proper belt
tension is attained. On some fans, fasteners attaching the motor to the motor plate
must be loosened in order to adjust the belt.
It is very important that the drive pulleys remain in proper alignment after
adjustments are made. Misalignment of pulleys will result in premature belt wear,
noise, vibration and power loss.
Fasteners and Set Screws
A periodic inspection should include checking all fasteners and set screws for tightness. Particular attention
should be paid to set screws attaching the propeller to the shaft and the shaft to the bearings. Loose bearing
set screws will lead to premature failure of the fan shaft.
Motors
Many fractional horsepower motors installed on the smaller fans are lubricated for life and require no further
attention. Motors supplied with grease fittings should be greased according to directions printed on the motor.
Removal of Dust and Dirt
Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant, and collects on the impeller
causing severe imbalance if left unchecked. The exterior surface of the motor and impeller should be thoroughly
cleaned periodically. Use caution and do not allow water or solvents to enter the motor or bearings. Under no
circumstances should motors or bearings be sprayed with steam or water.
Exhaust Fans Part List
Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information
in addition to the parts list shown, will assist the local Greenheck representative and the factory in providing
service and replacement parts.
Side View Top View
MOTOR
PLATE
MOTOR
COVER
(OPTIONAL)
BEARING
SUPPORT
MOTOR
PULLEY
MOTOR
BELT
WHEEL
BELT
TUBE
SHAFT
PULLEY
BEARING
COVER
INLET CONE
(VENTURI)
BEARINGS
SHAFT
Our Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year
from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at
our option when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer
for a period one year. Should motors furnished by Greenheck prove defective during this period, they should be
returned to the nearest authorized motor service station. Greenheck will not be responsible for any removal or
installation costs.
As a result of our commitment to continuous improvement,
Greenheck reserves the right to change specifications without notice.
#469003 Vektor-H IOM
Copyright © 2006 Greenheck Fan Corp.
Rev. 2, August 2006
Loading...