User's Manual

Operation
September 2013 5-4 P/N 81-CO2MAN-001
5-5.2 Local Manual Operation
1. Unwind hose from reel or rack. Verify that the horn valve is in the "closed" position.
Note: If a reel is used, it is not necessary to remove or unwind the entire length of hose.
However, if a rack is used, the hose must be completely removed before charging the
line.
2. Proceed to carbon dioxide cylinder(s).
3. Remove the locking pin from the cylinder control head, and rotate the local manual release
lever to the “released” or “open” position.
4. Approach fire carefully. Do not allow hose to lie in the path of the flames. Point horn at
hazard. Open horn valve by pushing stirrup handle forward.
5. Direct carbon dioxide discharge at base of the flames. As flames recede, follow slowly.
Follow detailed instructions below.
Surface Fires:
a. Direct carbon dioxide discharge close to the edge of the fire nearest you. DO NOT
point the horn at the center of the flame. If the hose horn must be aimed into an
inaccessible fire, the horn must be in the OPEN position.
b. Sweep the horn slowly back and forth across the base of the flames. Chase flames
slowly as the fire is extinguished. For vertical fires, direct the discharge at the
bottom and gradually work upward as the fire recedes.
c. Continue discharging carbon dioxide until all smoldering material is covered with
carbon dioxide "snow".
Electrical Fires - Switchboards, Motors, Etc.
a. Discharge carbon dioxide into all openings on burning substances.
b. Continue to discharge carbon dioxide until flames have been extinguished and the
burned material is coated with carbon dioxide "snow". This will prevent any
incandescent material from re-igniting.
6. After the fire has been extinguished, leave the horn valve open to relieve all pressure from
the hose.
7. Perform post fire maintenance. Refer to Chapter 7 for details.
WARNING
Except when in use, pressure shall not be permitted to remain in the hose line.
CAUTION
While it is not necessary to de-energize equipment before discharging carbon
dioxide onto electrical fires, equipment must be de-energized as soon as
possible after system discharge to prevent the fire from spreading.
WARNING
Except when in use, pressure shall not be permitted to remain in the hose line.