Labconco Paramoun Ductless Enclosures 69636 Series, 6' Widths - Manual (Page 19)

Chapter 3: Getting Started
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Validate the Enclosure
To determine the actual face velocity at the sash opening, airflow velocity
readings are taken. Each Paramount Ductless Enclosure has been preset at
75-80 fpm. The “average face velocity” is achieved by taking readings
across the enclosure with the readings 6" from the ends and evenly spaced
every 12". Readings are measured at 5" directly below the upper sash handle.
Refer to Chapter 2 for proper airflow volumes for your particular model.
The Paramount Ductless Enclosures have been tested at Labconco’s airflow test
facility 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 particulate powder
validation, Labconco had containment testing performed to validate the
enclosures for naproxen sodium powders. The Paramount Ductless Enclosures
demonstrated excellent containment when used by an operator using excellent
technique and good containment when used by an operator using marginal
technique. While no enclosure can compensate for improper technique, these
tests confirm that the Paramount Ductless Enclosures provide a safe working
environment. For copies of these validation reports, contact Labconco at 800-
821-5525 or 816-333-8811.
Seal the Enclosure to the Work Surface
When the enclosure has been set in place, it can 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 enclosure to the work surface.
Connecting to the Exhaust System (If Applicable)
WARNING: The weight of the exhaust ductwork system must be
supported independently of the enclosure superstructure or damage may
occur.
The exhaust system should be installed by a qualified HVAC contractor.
Normal operations with the Paramount Ductless Enclosure are exhausted into
the room and the accessory Canopy Exhaust Connection is not required. The
Canopy Exhaust Connection aids in the further removal of chemicals beyond
the filters or applications where a higher degree of powder and particulate
removal is required. However, if desired, the Canopy Exhaust Connection
(see Chapter 7) accessory has been designed to accept 6" diameter ductwork.
Review Chapter 2 for exhaust prerequisites and review Chapter 7 for ordering
blower exhaust equipment. Consult Labconco should you require help sizing
your blower for the exhaust volume and system static pressure loss. To
ensure compatibility, the selected exhaust duct material should match the
enclosure, procedures and chemical applications.