Operating instructions
VENTILATOR HOOD 
9 
SV504 SvcManual WV-4H(RW) 
HOOD SECTION - OPERATIONAL NOTES (continued) 
FIRE DAMPER INSTRUCTIONS 
1.  The FIRE DAMPER is accessible by removing the TOP PANEL 
  The FIRE DAMPER sets in the DAMPER SUPPORT and may be 
  removed by lifting straight up. 
2.  The FIRE DAMPER normally needs no maintenance. If it 
  becomes heavily contaminated with dust and/or grease, it must 
 be replaced. 
3.  If the FIRE DAMPER malfunctions or if the fusible link releases, 
  the manufacturer recommends that the entire FIRE DAMPER 
 ASSEMBLY be replaced. 
4.  Reinstall the FIRE DAMPER with the “THIS SIDE UP FOR 
  HORIZONTAL MOUNTING” arrow pointing away from the 
 BLOWER. 
IMPORTANT: 
Replace the entire fire damper 
assembly if the link trips, or if the 
damper mechanism becomes 
heavily contaminated with dust 
and/or grease. 
While the fusible link alone may be 
replaced, once the damper has 
tripped it may no longer function 
reliably. 
Contact factory for pricing and 
availability. 
LABEL
SHUTTER
FUSIBLE LINK
280ºF
ACCESS DOOR
THIS SIDE
THIS SIDE UP
FOR HORIZONTAL
MOUNTING
¬ ®
AIR FLOW
THIS
SIDE UP
FOR VERTICAL
MOUNTING
FIRE
DAMPER
DAMPER
SUPPORT










