Greenheck Fan SEDFD Merkblatt

Part Number 471602 

Fusible Link Replacement on

 

FD, DFD, ODFD, OFD, SSFD, SSDFD, 

SEDFD and KFD Series 

Curtain Fire Dampers

 

FSD, SEFSD, SSFSD, CFSD, and OFSD 

Series 

Combination Fire Smoke Dampers

INSTALLATION INSTRUCTIONS

1

3

4

2

Side cross-section view of

Curtain Fire Damper in wall

Replacing fusible link on a curtain fire damper:

1)  Bend metal straps so they are straight (Fig. 1, item 3). Remove 

separated fusible link (Fig. 1, item 4).

2)  Push bottom of curtain blades to the top of the damper such that 

the blades fold up like an accordion. (If the damper blades have 
coil springs, use additional care when pushing the blades to the 
top of the damper as the springs are strong and may cause injury 
if blades are released.)

3) Slide the replacement fusible link onto the metal straps.
4) Bend the metal straps up to hold the fusible link in place.

Replacing fusible link on a combination fire smoke 
damper:

1)  If fail closed, disconnect power and/or air pressure from damper. 

If fail open, apply power and/or air pressure to damper. Damper 
should be in the full closed position. 

2)  Remove and discard the existing retaining clips (Fig.2, item 1) 

and fusible link (Fig.2, item 2).

3)  Install replacement fusible link as shown in the diagram 

(temperature rating facing outward). The crankarm secured with 
a bolt may require some minor rotation to align link with pins.

4)  Install retaining clips in the groove of each of the pins holding the 

fusible link.

5) Reconnect power.

Item #

Description

1

Damper

2

Sleeve

3

Metal strap

4

Fusible link

Fig.1 

1

2

Important!

Fusible link must be put 
on with temperature rating
facing outward as shown

Fig. 2

Item #

Description

1

Retaining clips

2

Fusible link

Note: When replacing fusible link, make sure it is the 
same temperature. If a different temperature, consult 
factory.