Rectangular Medium Pressure Zone Dampers (WSTMRTD)
Heavy Duty Rectangular Dimensional Data
Part Number WCD W x H
Sizes available from 8” x 8” up to 48” x 48”
D
H
D
2 ”
Medium Pressure Rectangular Dimensional Data
Part Number WSTMRTD W x H
Sizes available from 8” x 6” up to 24” x 20”
2 ”
2 ”
5”
H
Zonex Systems rectangular medium pressure dampers are recommended for systems under
7.5 tons with a maximum differential static pressure of 1”. The damper is equipped with a
damper board designed to support and communicate with a Zonex wireless
programmable thermostat. These are fully modulating, 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
- inch wide cutout in the existing duct and
attaches with screws via a duct mounting plate. The duct mounting plate is 5 inches wide. A
hat section supports a reversing 24vac, 60Hz, 2 VA motor. A magnetic clutch allows for
continuous power to the motor and longer motor life. Two set screws connect the motor to
the damper shaft, allowing quick motor replacement if necessary. Motor drive time from
full open to full close is 90 seconds.
Rectangular Heavy Duty Zone Dampers (WCD)
Zonex Systems rectangular heavy duty dampers are recommended for systems 7.5 tons or
larger with a maximum differential static pressure of 1.75”. The damper is equipped with
a damper board designed to support and communicate with a Zonex wireless
programmable thermostat. These are fully modulating, power open / power close dampers
made of 20 gauge “snap lock” steel frame with S & 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 2 VA, drives the motor from full open to full close in 90 seconds.
The rectangular zone dampers are available in either medium pressure or heavy duty. For systems under 7.5 tons,
use medium pressure dampers, (part #WSTMRTD size). For systems 7.5 tons or over, use heavy duty dampers,
(part #WCD size). Motor drive time open and close is 90 seconds.
GEN III
– VVT
38