Spring Air Systems Rev Low Engineering Manual page 13

When the signal reaches the control panel the exhaust fan is shut off, the building fire alarm
contact close and the hot water solenoid valve is energized, flooding the interior of the grease
extractor with water. The water spray and closed fire damper provide an effective barrier to
impede the spread of fire into the exhaust ductwork.
After the fire has been extinguished, the fire damper must be reset. Open the front access door
of the grease extractor and replace the fusible link.
Arrangement "D": Fusible Link Activated, Dead Weight.
The arrangement "D" hood and damper assembly system consists of a fusible link damper
mounted in the exhaust duct collar.
In the event of a fire within the grease extractor the fusible link melts closing the fire damper
against the force of a dead weight mounted on the damper blade. The closed damper impedes
the spread of fire into the exhaust ductwork. After the fire has been extinguished the fire damper
must be reset. To reset the fire damper the fusible link is replaced. Open the access door on the
front of the ventilator. Pull the fire damper open and replace the fusible link to secure the damper
in place. The fusible link should be examined periodically in accordance with the NFPA-96
(SPRING AIR SYSTEMS recommends inspection every six months.)
______________________________________________________________________
Spring Air Systems REV LOW Engineering Manual Revision 2.0 -021902
1
DAMPER END SWITCH
2
Arrangement "F" Fire Damper ENS Enclosure
Figure 13
Arrangement "D" Fire Damper cross Section
Figure 13B
_
ARRANGEMENT "F" FIRE DAMPERS:
TWO (2) WIRES TO EACH ENS ENCLOSURE LOCATED
AT EACH EXHAUST DUCT COLLAR ON EVERY HOOD
120V/1/60 - 1 AMPS. WIRE EACH ENS IN PARALLEL.
11