Labconco Protecto PVC Laboratory Fume Hoods 14181 Series - Manuel (Page 21)

Chapter 3: Getting Started
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Original instructions
The exhaust duct system for a PVC Fume Hood should be run
in a vertical position and feature horizontal runs only where it
cannot be avoided. Should a horizontal run be a part of your
exhaust system, it should be sloped downward toward the hood
to prevent the pooling of the washdown water and perchloric
acid salts or acids in the duct.
Le système de conduits d'échappement pour un PVC Hotte doit
être exécuté dans une position verticale et horizontale
fonctionnalité fonctionne uniquement lorsque cela ne peut être
évité. Si une course horizontale être une partie de votre système
d'échappement, il devrait être en pente descendante vers le
capot pour empêcher la mise en commun de l'eau de lavage à
grande eau et les sels de l'acide perchlorique ou acides dans le
conduit.
CAUTION: PVC Fume Hoods must never be manifolded into a
common exhaust system. They require a dedicated exhaust
system.
ATTENTION: PVC hottes ne doivent jamais être un tuyau
collecteur dans un système d'échappement commun. Ils exigent
un système d'échappement spécifique.
Connecting to the Exhaust Washdown
The entire exhaust duct system must have an adequate washdown system. This
includes the exhaust ductwork located between the exhaust blower and the hood
structure, the exhaust blower, and any ductwork located on the outlet side of the
blower. Wash rings are recommended to be placed in the exhaust duct system
approximately every 8 to 10 feet and after every change in direction to provide an
adequate washdown. A drain should be provided in your exhaust blower and this
washdown water and effluent material can be drained from the exhaust blower
back directly into the exhaust duct for disposal. The PVC Hood was designed with
an auxiliary port plugged at the factory, and it is to be connected to the washdown
valve system to provide water to the wash rings. The plug is located on top of the
hood near the first washdown nozzle. Plumb from the plugged connector with a
3/8" rigid polyethylene, copper, or stainless steel line.
Connecting to the Washdown Drain
The Protector PVC Hood has been supplied with a 2" nominal (2.375" OD) PVC
pipe drain. Connect the 2" pipe to your floor drain. Be sure the connection is
either fully solvent bonded or leak tight. See Figure 3-2.
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