14
Damper Options and Operation
The AstroHood
™
S-l unit is supplied standard with an ESD (Energy-Saving Damper); the AstroHood
S-2 unit is available with a Guillotine, Split Butterfly, and ESD damper options. All damper adjustment
control is accessed from the room side by removing the damper adjustment port plug and making
adjustments with a Phillips head screwdriver.
The ESD utilizes a proprietary, pressurized
plenum design that minimizes system
resistance to industry lows while also
providing superior airflow uniformity. The
ESD is operated and adjusted from the room
side with a Phillips head screwdriver via
mechanical rod and rack & pinion control,
affording infinite fine-tuning adjustment over
a minimum of ten (10) full turns and making it
inherently self-locking (see Fig 23).
The Guillotine Damper is operated from
the room side by a mechanical rod linkage
assembly of stainless steel construction
with a control rod. It is adjusted from fully
open to fully closed position with a quarter
revolution using a Phillips head screwdriver
(see Fig. 24). The guillotine damper is locked
in position with a set screw.
Fig: 22 Damper Adjustment
Fig: 23 ESD Energy-Saving Damper
Fig: 24 Guillotine Damper
