Connecting the electrical supply, Sealing to the work surface, Validating the hood – Labconco Protector Demonstration Hoods 3945021 User Manual
Page 18
Chapter 3: Getting Started
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Connecting the Electrical Supply
A standard duplex receptacle should be nearby for connecting the FilterMate
Portable Exhauster, airflow monitor and accessories. Please review Chapter
2 for electrical prerequisites.
All wiring for the building duplex outlets SHOULD be performed by a
licensed electrician and conform to all local codes.
Sealing to the Work Surface
When the hood has been set in place, ducted and wired, it may be sealed at
the work surface to prevent spilled materials from collecting under the walls.
A bead of silicone sealant is recommended to seal the hood to the work
surface.
Validating the Hood
The exhaust damper, exhaust blower or FilterMate gives you the flexibility to
change the airflow at the sash opening of your enclosure. Determine the
actual face velocity at the sash opening by taking airflow velocity readings.
These should be taken across the sash opening of the enclosure in accordance
with the Industrial Ventilation Manual. (See Appendix D) The “average face
velocity” is achieved by taking readings in two rows across the enclosure
with the readings 6" from the ends and evenly spaced every 12"; the first row
is 3" down from the upper sash foil and the second row is 3" up from the
work surface. Labconco recommends an average face velocity at the sash
opening of 60 to 100 feet per minute for Protector Demonstration Hoods.
Refer to Chapter 2 for proper airflow volumes for your particular model.
Your Protector Demonstration Hood has been tested at the factory per
ASHRAE 110-1995. All enclosures achieve an “as manufactured rating” of
less than 0.05 part per million (ppm) at 4 liters per minute (lpm); AM <0.05
(Consult Labconco for individual ratings). For “field use” ASHRAE testing
contact Labconco for a certified on-site contractor.
NOTE: Face velocity profiles and smoke testing should be performed
frequently per your organization’s quality system to ensure safe
performance.