Greenheck DFD Series User Manual (English)

Other manuals for Greenheck DFD Series

Questions and Answers:

C
chavezisaacJul 28, 2025
How to fix a Greenheck Fire and Smoke Damper that doesn't fully open or close?
- J
  Jacqueline ClarkJul 28, 2025
  If your Greenheck Fire and Smoke Damper doesn't fully open or close, there could be several reasons. First, the frame might be racked, causing the blades to bind on the jamb seals; adjust the frame to ensure it is square and plumb. Second, screws in the damper linkage might be the problem; the damper may be installed too far into the wall, so move it out to the line designated on the damper label. Finally, contaminants on the damper could be the cause; clean it with a non-oil based solvent, as detailed in the Damper Maintenance section.
A
aryanAug 2, 2025
How to fix Greenheck Fire and Smoke Dampers that don't fully open or close?
- J
  James HillAug 2, 2025
  If your Greenheck Fire and Smoke Damper doesn't fully open or close, several factors could be at play. First, the frame might be 'racked,' causing the blades to bind. In this case, adjust the frame to ensure it's square and plumb. Another potential cause is a loose actuator linkage; to resolve this, close the damper, disconnect the power, and then adjust and tighten the linkage. A defective motor could also be the culprit, requiring replacement. If screws are present in the damper linkage, it may be installed too far into the wall; move it out to the designated line on the damper label. Finally, contaminants on the damper can impede its function; clean it with a non-oil-based solvent.
J
James TrujilloAug 6, 2025
What to do if the link separated in my Greenheck Fire and Smoke Dampers?
- T
  tanyaaliAug 6, 2025
  If the link in your Greenheck Fire and Smoke Damper has separated, it is likely due to heat. The solution is to replace the link.
W
wilkinsteresaAug 12, 2025
Why Greenheck Air Conditioner damper does not fully open or close?
- J
  jbergAug 12, 2025
  The damper may not fully open or close due to several reasons. The frame might be 'racked,' causing the blades to bind on the jamb seals. In this case, adjust the frame to ensure it is square and plumb. Another cause could be screws in the damper linkage, or the damper may be installed too far into the wall. Move it out to the designated line on the damper label. Finally, contaminants on the damper can also cause this issue; clean the damper with a non-oil based solvent, following the Damper Maintenance guidelines.
H
Heather ThompsonAug 17, 2025
What to do if the link separated in Greenheck Air Conditioner?
- J
  Jamie BonillaAug 17, 2025
  If the link has separated, this may be due to heat. Replace the link.
P
petersphilipAug 21, 2025
Why is the RRL or TOR sensor tripped on my Greenheck DFD?
- J
  Jeremy DoyleAug 21, 2025
  If the RRL or TOR sensor has tripped in your Greenheck Fire and Smoke Damper, it's likely due to heat. To fix this, push the reset button located on the backside of the RRL or TOR.

Greenheck DFD Series Specifications

General

Application	Fire and smoke control
Maximum Velocity	4000 fpm
Temperature Rating	350°F (177°C)
UL Standard	UL555S
Blade Type	Opposed or parallel
Blade Material	Galvanized steel
Frame Material	Galvanized steel
Installation	Vertical or horizontal
Type	Dynamic