Motorized Rectangular Dampers
Old Fashioned Reliability With NEW State of the Art Technology
- Heavy Duty Frame
- Nylon Bushings for Quieter Operation
- Revolutionary Motor with greater Reliability
- LED’s to Show Damper Operation
- Low Leakage
- Simple 3-wire Hook-up
- Easier Ordering
- Motor is always mounted on second dimension specified
ND SERIES DAMPERS
The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind.
This damper is easy to install and easy to checkout. The LED display allows
the installer to visually check the damper operation. With a sturdier frame,
the damper installs in the duct much faster and easier and the nylon
bushings insure quieter operation. This is a feature that homeowners will
never hear about! Quieter operation and a longer life motor equals NO call
The motor for the ND damper is driven by 17 in. lbs.
of torque, possesses a manual gear release, 3 wire power open/power closed
operation and fail-safe LED’s for quick diagnostic checks. The motor is UL
listed and NEMA Class 2 certified. The easy access, quick connecting
terminal block eliminates the need for wire nuts and allows for trouble free
The ND damper has a 97% leak
proof rating. Overlapping blades and a strong positive off motor insures
accurate control of all zones. The ND dampers combined with the Ultra-Zone
zoning system provides the most comfortable and reliable system in the
The ND is available in 8" x
6" thru 30" x 30" in even inch increments.
The motor will be mounted on
the second dimension when ordered. For example, a 16" x 8" damper will
have the motor mounted on the 8" dimension, while an 8" x 16" will have the
motor mounted on the 16" dimension. This will alleviate the confusion
between side mount and bottom mount dampers.
For added flexibility, ND
dampers can also be provided with a spring return style motor , Model
ND-RSD. The ND-RSD does not have LEDs.
Please specify the unpowered state of ND-RSD dampers as "normally
closed" or "normally open" when ordering.
The MA-ND5 (power open/power close) motor actuator
cannot be used to replace an existing MA-RSD (spring return) motor actuator,
nor can an MA-RSD replace an MA-ND5.
3/8" hex shaft - no motor
Manual Quadrant - no motor
35 in/lbs 24 volt motor
15 Second Motor
24V Spring Return
120V Spring Return
Duct Board Adapters
These brackets are used to mount ND and ND-RSD style dampers to fiberglass
duct boards. The brackets are 1" thick. Add the number "5" to the part
number for 1.5" thick duct board (EX: DBA-10-5). Sizes range from 6" -
24" in 2" increments.