Kewaunee Supreme Air Series Manual

KEWAUNEE®
VENTURI FUME HOOD
Supreme Air Series
encouraging new discovery...Worldwide
Operation
Maintenance
Technical
Manual
Operation & Maintenance Procedures
Recommended Work Practices
Installation Instructions
VFHOMT-11/18

We’re honored that you have purchased a Kewaunee fume hood.
We take pride in many things; our families, our town, our flag and this great country — to
name a few. We also take great pride to have you as a customer. We have worked hard
to create the world’s safest and best fume hood. Why...? Because we know you are doing
important work—work that is sometimes dangerous — and we want you to be safe so you can
return home to your family.
We have spent countless hours creating this manual — it includes the latest fume hood
safety procedures and best practices. It also includes valuable installation and maintenance
information that will protect your fume hood investment. Please read this manual and practice
what it teaches. Knowing this manual will help you stay safe and help you keep your Venturi
fume hood working properly for years to come.
If you have any questions regarding your Venturi fume hood you can contact us at
[email protected] or call 704-873-7202.
Thanks again for purchasing Kewaunee.
The Kewaunee Fume Hood Assembly Group

VFHOMT-11/18 - 1
Supreme Air Venturi Fume Hoods
Operation & Maintenance
Technical Manual
Table of Contents
Operating Procedures
General Procedures
All Fume Hoods.............................................................................................2
Perchloric Acid Fume Hoods.........................................................................3
Venturi Fume Hood Features & Options
Features & Option Identification....................................................................4
Venturi Effect.................................................................................................5
LED Lighting..................................................................................................5
Electromechanical Sash Stop .......................................................................5
Belt Drive Pulley System...............................................................................6
Dynamic Barrier Bypass................................................................................6
Airfoil .............................................................................................................6
Rear Baffle Removal & Adjustment...............................................................7
Interior Access Panels ..................................................................................7
Exterior End Panels ......................................................................................7
Auto Sash......................................................................................................8
Tissue Screen ...............................................................................................9
Vent Holes.....................................................................................................9
Cord Pass Through.......................................................................................9
Safety Shield.................................................................................................9
Airflow Monitor ..............................................................................................9
Ceiling Enclosure ........................................................................................10
Maintenance Instructions
General Maintenance ........................................................................................11
Belt Drive & Pulley System Maintenance ..........................................................12
Sash Maintenance.............................................................................................12
Sash Leveling Instructions.................................................................................13
Troubleshooting Guide ......................................................................................14
Sash Glass Replacement Instructions
Vertical Sash...............................................................................................16
Combination Sash.......................................................................................18
Horizontal Sash...........................................................................................20
Recommended Work Practices...................................................................................22
Installation Instructions
Fume Hood........................................................................................................26
Base Cabinets ...................................................................................................29
Ceiling Enclosure...............................................................................................30
Wiring Diagram..................................................................................................31
Electrical - Prewired/UL Listed ..........................................................................32
Parts List............................................................................................................38

VFHOMT-11/18 - 2
Operating Procedures
General Procedures for Supreme Air Venturi Fume Hoods
Failure to follow these
Procedures may result in
overexposure to
contaminates or other
injury.
Other important
operating data
1. Do not use Perchloric Acid in a hood not specifically designed for use with
Perchloric Acid.
2. Prior to using hood, verify that the exhaust fan is operating and sufficient air
is being exhausted from hood.
3. Never put head into hood while contaminates are being generated.
4. Set up all apparatus and sources of contaminates at least 6” back from sash
opening and in recessed portion of worksurface.
5. Do not place electrical receptacles or other sources of ignition in hood when
flammables are present.
6. Use a safety shield if there is a possibility of a small explosion or runaway
reaction. This hood is not designed for explosion protection.
7. Do not obstruct slots in rear baffle.
8. Do not remove bottom deflector vane nor block off opening between the
underside of the deflector vane and the work top.
9. Place equipment with large flat surfaces parallel to hood face on legs 2” to 3”
high.
10. While working at hood, keep sash lowered to the minimum opening required
for access to working area. During other times, keep sash closed.
11. Wear gloves and other protective clothing if skin contact with airborne
contaminates is a hazard.
For more information see Recommended Work Practices on page 22
• Remove all materials from hood which are not needed for the immediate
work.
• Do not store chemicals in hood.
• Avoid making rapid movements while working at hood.
• Minimize personnel traffic past hood.
• Avoid creating air currents in the laboratory which affect the air flow patterns
into hood.
• Use good housekeeping in hood at all times. Clean up spills immediately.
• Test the performance of hood at least once every six months.
• In models with removable sash, always replace sash before operating.

VFHOMT-11/18 - 3
Operating Procedures
Procedures for Perchloric Acid Fume Hoods
When heated, Perchloric Acid becomes a strong oxidizer producing unstable
residues which contaminate the fume hood and ductwork and produce an
explosion hazard. The following additional precautions should be followed when
heating perchloric acid.
1. Use this hood only for Perchloric Acid procedures. Perchloric Acid may react
with organic materials to create an explosion hazard.
2. Operate the water wash down system for 15 minutes after each use. If the
hood is used continuously during the work day, then the wash down system
should be used at the end of the work day.
During the wash down procedure a small amount of water may drip into
the hood work area. Prior to operating the wash down system clear the
hood work area of any materials or equipment that may be damaged or
contaminated by this water.
The exhaust fan should be turned off during the operation of the wash
down system. The fan impeller wheel may be damaged by the water spray
impacting on it at a high velocity.
The valve for the hood wash down is located on the left front vertical fascia.
There may be a separate valve or switch for activating the wash down system
for the duct.
3. Approximately once a week, clean the interior surfaces of the work area with
water.
4. Place large hot plates on 2” or 3” tall metal legs to allow air flow below the hot
plate.
5. The use of other inorganic acids in the hood may adversely affect the
stainless steel liner and necessitate more frequent cleaning and operation of
the wash down system.

VFHOMT-11/18 - 4
Operating Procedures
Supreme Air Venturi Fume Hoods
Features & Options Identification
Venturi Port
Airfoil
LED Light &
Sash Stop
Control Panel
Exhaust Plenum &
Duct Collar Belt Drive
Pulley System
Rear Baffles
LED Light
Single Point
Connection
Junction Box Top Front Panel
Exterior
End
Panel
Interior
Access
Panel
Worktop
Venturi Port
ID/Serial No. Label

VFHOMT-11/18 - 5
Operating Procedures
Venturi Effect Kewaunee’s Venturi line of bench mounted fume hoods employ two Venturi ports
located at the bottom left and right corners of the sash. The Venturi ports assist
air movement and improves corner airflow. Prior to using the fume hood, ensure
these ports are not blocked and air movement is not impeded through the ports.
Do not run hoses, wires or cables through or above these ports. (see Cord Pass
rough section of this manual, page 9.)
LED Lights This hood is equipped with long life LED lights that enhance the user experience
and greatly reduces maintenance. The top three buttons of the Control Panel,
located on the hood side post, control the LED lights.
On/Off
Press once to turn the light on. Press again to turn the light off
Temperature
Three light temperature settings are offered:
Warm White 3000K
Neutral 4500K
Cool White 6000K
Pressing the Temperature button will cycle through the three settings.
Brightness
Fifteen (15) light brightness settings are offered. Each press of the brightness
button increases intensity by approximately 6.5%.
The LED light has a life expectancy is approximately 2 years and contains no
user serviceable parts.
NOTE:
If your hood is equipped with an explosion proof or vapor tight light the above
conditions may vary.
Supreme Air Venturi Fume Hoods Features
Light/Sash Stop Control Panel
Temperature
On/Off Brightness

VFHOMT-11/18 - 6
Operating Procedures
Supreme Air Venturi Fume Hoods Features
Electromechanical
Sash Stop The Venturi is equipped with a sash stop located within the sidewall of the fume
hood. A raised sash will meet the sash stop at a preset height and will stop upon
its encounter. To defeat the sash stop, press the “Sash Release” button. The sash
stop will release for 1½ seconds so the sash can be raised to full open. The sash
stop will not impede sash movement when the sash is being closed.
In the event of a power failure the sash stop may be released manually. To
manually override the sash stop, remove the protective plug button located just
behind the sash track, midway up, in the left end interior liner. Using your finger or
a probe, find the sash stop mechanism, and slide the plunger to the rear.
Belt Drive Pulley System Venturi employs a low maintenance, dual shaft, belt and gear driven sash system.
It is recommended that a user check the hood roof mounted sash support system
annually to ensure no foreign objects or obstructions have found their way into
the belt and gear path. A user should annually lubricate the pulley shaft bearings
with white lithium grease. The belt and gear has been tested to 300,000 cycles.
Dynamic Barrier Bypass The Venturi fume hood Upper Bypass is factory set and should not be modified.
In the event of a significant change in airflow application please contact
Kewaunee to see if the Upper Bypass requires modification.
Airfoil The Lower Airfoil should not be removed or altered to ensure safe fume hood
operation. Airfoils should be cleaned of all exposed chemicals in accordance to
the MSDS sheets and your laboratories safety guidelines.
Light/Sash Stop Control Panel
Sash Release

VFHOMT-11/18 - 7
Operating Procedures
Supreme Air Venturi Fume Hoods Features
Rear Baffle Removal
and Adjustment The Venturi fume hood is designed with rear baffles that require no user
adjustment. These baffles are intentionally non-adjustable and should not be
removed while the fume hood is in use. For cleaning or other maintenance, the
baffles can be removed (without tools) by lifting up and then pulling the bottom
out towards the user. Baffle replacement is accomplished by reversing the
removal process.
Interior Access Panels Hoods are equipped with Interior Access Panels allowing user access to the
hood sidewalls. These access panels are held in place with a gasket and are
removable (without tools) by pulling gently on the gasket perimeter until the
gasket and panel are free. Access panels are replaced by gently working the
gasket back around and into the access opening perimeter until the gasket and
panel sits flush with the hood interior sidewall.
Exterior End Panels The left and right exterior fume hood sides are removable without the use of any
tools by lifting the end panel up and away. Depending on the size of the hood a
user may want to employ a second person to safely remove the panel. To replace
the end panel, insert the tabs on the end panel in the slots in the hood frame,
press the panel in, and press down.

VFHOMT-11/18 - 8
Operating Procedures
Supreme Air Venturi Fume Hood Options
Auto Sash Auto Sash Return
The Auto Sash Return option is a passively balanced system that lowers the
open sash to an 18” operating height. When the sash is raised to the full open
position, a sash lock holds the sash open for set-up purposes. By pressing the
electronic sash stop release button, the sash automatically closes to the 18"
operating height.
Push Button Sash
The Push Button Sash, located within the light control panel, is a motorized
sash controller that opens or closes the sash. From the closed position, a single
push of the up button will open the sash to a preprogrammed sash stop height
and another push of the up button will then fully open the sash. From the open
position, a single push of the down button will fully close the sash. At any time
a user may interrupt the mechanism, and stop sash travel, by pushing the stop
button. In the event of a sash obstruction the sash will stop and retract a few
inches so the object can be removed. When the mechanism is not in operation,
the sash can be manually opened or closed. The standard electromechanical
sash stop is not provided when this option is chosen. The push button sash
mechanism is supplied installed and prewired to a junction box located on the top
of the hood.
Split sash hoods are equipped with two sash controllers-one for each sash.
Auto Sash Operator
The Proximity Sash is designed to close the sash after it has been left open
for a set period of time. Using an Overhead Motion Sensor the system senses
operator absence and then closes the sash after a programmable time period
(0-3600 seconds). At any time a user can override this function and manually
adjust the sash.
The system also includes a photoelectric sensor which scans the sash plane for
obstructions. Any obstruction will halt sash descent and issue a warning. Once
the obstruction is removed the system will reset and sash operation will continue.
All control variables are user programmable. See supplemental Proximity Sash
manual for more information.
The Automatic Sash Operator is supplied factory installed and prewired to a
junction box located on the top of the hood.
NOTE: The Proximity Sash Operator can be programmed to open or close a
sash. As it is possible that an occurrence in a fume hood could be complicated
by opening the sash, Kewaunee recommends this system to be used only for
closing the sash. Therefore, the choice of opening of a sash should be manually
performed.