Laboratory Exhaust System
9
®
Fan and Plenum Drainage Piping / Trap Detail (By Others)
There is a location for a pipe connection on each tubular
fan housing and bypass air plenum. Each drain may
need to be connected to a drainage system to ensure
proper disposal of any water or condensate that may
occur.
• Drain connections are 1/2-inch NPT
• Installed piping to have a downward angle to allow
for drainage
• Fill traps to recommended level before start-up
Note: A conservative method of trap design is to set N
= total static pressure.
Fan Drain
Connection
Plenum Drain
Connection
H = 1 in. for each inch of maximum negative static pressure plus 1 in.
J = 1/2 of H
L = H + J + Pipe diameter
L
H
J
• Connect this end to the optional BAP drain
•
L
H
J
• Connect this end to the fan drain
•
* A trap is needed for each fan
