Cabinet/007 Cabinet Exhaust Dampers.pdf

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From: Jim Ziaukas

Sent:   Tuesday, June 15, 1999 1:37 PM

To:        Billy Anderson; Bob Oakley; Chad Koepke; Clay Brown; David Ament; Eulie Rushton; Greg Saxon; Hal Holloway; Jim Lang; Jim Ziaukas; Karl Vanky; Keith Clay; Lewis Watford; M Warren; Matt Engelbert; Mohammad Farooq; Mohammad Naeemullah; Ray Hopkins; Ricky Teal; Robert Lawson; Ron Eberhart; Russ Fiveash; Shawn Nassiri; Tim Gray

Subject:    (7) NON-MOTORIZED RES EXHAUST DAMPERS

For NON-MOTORIZED DAMPERS Seasons-4's replacement equipment (RES) exhaust damper design guideline is as follows:

Without exhaust/return fans (Gravity Exhaust)

Up to and including 1500 FPM face velocity: Arrow model 500-CB damper

Above 1500 FPM face velocity: Arrow model 655 damper

With exhaust or return fan (Powered Exhaust)

All face velocities: Arrow model 655 damper

Where airfoil blades are required (with powered exhaust ONLY)*

All face velocities: Arrow model 800 "Arrow-Foil"

Design velocity extremes are 1000 to 1800 FPM. 1500 FPM is generally the target for the design.

*Note that this damper is not recommended. Airfoil blades are a waste on exhaust dampers. This particular damper will not open against gravity exhaust. POWERED EXHAUST IS REQUIRED.