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The rectangular zone dampers come in either low pressure, medium pressure, or heavy duty. For systems 5 tons or under use low pressure.
For systems under 10 tons use medium pressure dampers. For systems 10 tons or over use heavy duty dampers. Motor drive time open and close
is 90 seconds, except for the low pressure damper which springs open.
RECTANGULAR LOW PRESSURE ZONE DAMPERS
(101EC 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 close 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 synchronous 24V AC 60Hz 12VA motor and ter-
minal board. The motor is designed for continuous full stall operation. Spe-
cial 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. 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 (101MRTD W x H)
Zonex Systems
rectangular medium pressure dampers are recommended for systems under 7.5 tons with a maximum differential static
pressure of 1”. These are power open, power close dampers. They are constructed from heavy duty aluminum and stainless steel. The damper 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. The damper supports a 35 lb./in. 24V, 6 VA power open, power closed actuator with a damper relay board interface. The actuator is designed
for full stall operation, with a magnetic clutch to protect the internal gearing. The actuator is direct coupled to the damper shaft, which provides positive
operation and offers replacement ease if required.
RECTANGULAR HEAVY DUTY ZONE DAMPERS
(101CD W x H)
Zonex Systems
rectangular heavy duty dampers are recommended 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. A full stall motor, drawing 6 VA and
a relay board control the damper position.
MEDIUM PRESSURE (101MRTD) AND
HEAVY DUTY (101CD) RECTANGULAR DAMPERS
ZONE DAMPERS
LOW PRESSURE (101EC W x H) RECTANGULAR DAMPER
RECTANGULAR ZONE DAMPERS
