Chapter 3: Getting Started
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17
Original instructions
CAUTION:
Natural gas should be used only in the service
fixture that has been pre-plumbed with brass tubing. Sulfur
content of the gas could cause deterioration of standard copper
supply lines.
PRUDENCE : Le gaz naturel devrait être seulement utilisé
dans l'accessoire de service qui a été pré soudé avec des tuyaux
de cuivre. Le contenu soufré du gaz pourrait causer la
détérioration des lignes d’alimentation en cuivre standard.
Sealing the Protector Hood to the Work
Surface
When the hood has been set in place, ducted, wired, and plumbed, it should be
sealed at the work surface to prevent spilled materials from collecting under the
walls of the hood. Materials such as silicone sealants are recommended to seal
the hood structure.
Certifying the Protector Fume Hood
The combination of your laboratory hood, exhaust ductwork, and exhaust blower
gives you the flexibility to change the airflow at the sash opening of your hood.
To determine the actual face velocity at the sash opening, airflow velocity
readings will need to be taken. This should be done across the sash opening of
the hood in accordance with the
Industrial Ventilation Manual
section on
laboratory hoods (see
Appendix E: References
). Labconco recommends an
average face velocity at the sash opening of 60 to 100 feet per minute. Consult
Chapter 2 for proper airflow volumes for your particular model.
Your Protector Fume Hood has been tested at the factory per ASHRAE 110-1995.
All hoods 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
fume hood ratings). For “field use” ASHRAE testing contact Labconco Sales
Engineering Team or Customer Service for a certified on-site contractor.
NOTE: Face velocity profiles and smoke testing should be
done periodically to ensure safe performance
.
NOTE : Les profils de flux frontal et les tests de fumée
devraient être régulièrement faits pour garantir une utilisation
en toute securité.
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