Advertisement
Before Installing Damper in the Duct
1. If damper has more than one blade, determine which blade axle will be driven by the extended control shaft.
Always attach extended control shaft to a blade axle which is directly connected to the main linkage tiebar. DO
NOT attach extended control shaft to a crossover blade axle.
2. Cut hole approximately 1 in. diameter in the duct where damper drive blade axle will be located. Hole must
provide clearance for enlarged portion of the extended control shaft.
After Damper is Installed in Duct
1. Push extended control shaft through the hole in the duct and onto drive blade axle. Retainer clip should "click"
into groove on the drive blade axle and hold shaft into place. Standard control shaft location is the third blade
from the bottom on dampers with three or more blades. Control shaft location is the first blade from the bottom
on dampers with one or two blades.
2. Install the stand off bracket with provided cap screws, nuts, and Tek screws.
3. Attach mounting plate to stand off bracket with (2) #10 Tek screws, as shown.
4. Attach cable operator to mounting plate with (2) #10 Tek screws, as shown.
5. Insert the end of the cable into the coupling on the cable operator. Tighten the set screw.
6. Use
⁄
in. bit driver to rotate cable until set screws on cable operator gear are orientated such that they are
1
4
accessible with a hex key. Tighten set screws.
7. Run the cable to termination point and secure the cable at 3 ft. intervals and every change in direction. Cables
should be taut or nearly taut with a 4 in. minimum turn radius. For cable runs longer than 20 ft., use of conduit is
recommended on straight run sections.
8. Fasten ceiling/wall plate to framing at the termination point, aligning the depth so that the box is properly aligned
with the finished surface. (Illustration B)
9. For ceiling mount applications, use a
10. For wall mount applications, move guide and bushing to
top knockout. Pull the cable out towards you to allow driver
access, then balance damper. Push the cable back in place
once balancing is complete.
11. Install cover plate.
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the
literature section of the website at Greenheck.com/Resources/Library/Literature.
®
Phone: 715.359.6171 • Fax: 715.355.2399 •
GFC
464599 • MBD-15, Rev. 9, October 2022
⁄
in. bit driver to balance your damper.
1
4
: 800.355.5354 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
Illustration B
Copyright 2022 © Greenheck Fan Corporation
Advertisement
