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RECTANGULAR ZONE DAMPERS
ZONE DAMPERS
Rectangular zone dampers are available for the DigiTract 4 controllers in three (3) styles:
TREC WxH for low pressure applications (5 tons or less) rated at .5” SP;
STMRTD WxH for medium pressure applications up to 7.5 tons, rated at 1” SP;
STCD WxH for heavy duty applications over 7.5 tons, rated at 1.75” SP.
RECTANGULAR LOW PRESSURE ZONE DAMPERS
(TREC W x H)
Zonex Systems rectangular low pressure dampers can be used for
systems up to 5 tons with a maximum differential static pressure of
0.5”. These are two position, spring open, power closed dampers.
They are constructed from heavy duty galvanized steel. The
damper is a single blade type that slips into a 2-1/2” wide cutout
in the existing duct and attaches with screws via a duct mounting
plate. The duct mounting plate is 5” wide. The drive assembly
supports a sychronous 24V AC 60Hz 12VA motor and terminal
board. The motor is designed for continuous full stall operation.
Special winding and heavy duty gearing provide for long motor
life and easy spring open operation. A cross pin on the motor
shaft provides positive direct drive to the damper shaft without a
coupling or set screws. Motor drive time from full open to full
close is 30 seconds. A red LED will illuminate on the damper
terminal board to indicate when the damper is being powered
closed. The LED will remain on when the damper is fully closed
and cycle off when the damper is opening or in the full opened
position. Since this is a spring open damper, in the event of power
failure the damper fails to the full open position.
RECTANGULAR MEDIUM PRESSURE ZONE DAMPERS
(STMRTD W x H)
Zonex Systems rectangular medium pressure dampers are recom-
mended for systems under 7.5 tons with maximum differential
static pressure of 1”. These are power open, power close dampers.
They are constructed from heavy duty aluminum and stainless
steel. The dampers is an opposed blade type that slips into a
3-1/4” wide cutout in the existing duct and attaches with screws via
a duct mounting plate. The duct mounting plate is 5” wide. Power
consumption is 2VA. The motors are designed for continuous full
stall operation. Special winding and heavy duty gearing provide
for long motor life.
RECTANGULAR HEAVY DUTY ZONE DAMPERS
(STCD W x H)
Zonex Systems rectangular heavy duty dampers are recommend-
ed for systems 7.5 tons or larger with a maximum differential static
pressure of 1.75”. These are power open, power close dampers
made of 20 gauge “snap-lock” steel frame with S and drive duct
connections. Allow a 16” gap in the duct for the damper. Formed
steel blade stops incorporate a gasket for quiet operation and
improved structural rigidity. Rectangular dampers under 10” in
height incorporate a single blade design. Dampers 10” or over use
opposed blade design. Power consumption is 2VA. The motors are
designed for continuous full stall operation. Special winding and
heavy duty gearing provide for long motor life.
MEDIUM PRESSURE (STMRTD W x H)
HEAVY DUTY (STCD W x H)
LOW PRESSURE (TREC W x H)
