DuroZone
INSTALLATION INSTRUCTIONS
SPRD110 SPRING RETURN DAMPER
DuroZone SPRD110 Spring Return Dampers can be configured for either Spring Open or Spring Closed opera-
tion. A mounting plate, with quick release clips is attached to both sides of the damper. The Spring Closed side
is identified S.C. and the Spring Open side is identified S.O. All SPRD110 dampers are shipped in the Spring
Closed (S.C.) position. To change to Spring Open (S.O.) operation, simply unclip motor from damper housing,
open damper blade and then clip the motor on the Spring Open (S.O.) side mounting bracket.
Black and White leads: 110 volt input (Black = hot / White = common) Green lead: Ground
All DuroZone Spring Return Dampers are listed with UnderWriters Laboratories (UL); File#E146462 Vol.2
Energizing the Black and White leads with 110 volts will open the damper.
Removing power from the Black and White leads will cause the damper
110 VAC
SPRD110 Dampers are equipped with Flow Adjustment Screws to limit the opening and closing of the blade,
thus limiting air flow. The adjustment Screws are factory set to the full open and closed position.
To adjust:
1. Loosen the adjustment screw locknut
2. Turn the adjustment screw clockwise to desired setting.
3. Tighten the adjustment screw locknut.
4. Subsequent adjustments can be made by turning the adjustment screw clockwise to decrease air flow or
counterclockwise to increase air flow. A second screw, located on the side of the damper motor, allows limited
adjustment of the open position of the damper. Adjustment is the same as above.
Duro Dyne East • Bay Shore, NY 11706 • Phone: 631-249-9000 • Fax: 631-249-8346
Duro Dyne Midwest • Fairfield, OH 45011 • Phone: 513-870-6000 • Fax: 513-870-6005
Duro Dyne West • Santa Fe Springs, CA 90670 • Phone: 562-926-1774 • Fax: 562-926-5778
Duro Dyne Canada • Lachine • Quebec • Canada • Phone: 514-422-9760 • Fax: 514-636-0328
©2009 Duro Dyne Corporation
Printed in USA 06/2009
BI035418
®
MOTOR LEAD IDENTIFICATION
- IMPORTANT -
This motor is designed for use with 110-120 VAC power source.
- WIRE ACCORDING TO LOCAL CODE -
Spring Closed Operation
(see next page for Spring Open operation)
to return to a fully closed position.
Switch or Relay
Contacts
www.durodyne.com
E-mail: durodyne@durodyne.com
(110 volt)
Wire
Connectors
Black
White
ALL DuroZone DAMPERS FEATURE:
• 5 year limited warranty • Maintenance
free operation • 100% factory testing •
Motor
Green