User's Manual

Design
September 2013 3-20 P/N 81-CO2MAN-001
Table 3-3. Volume Factors for Deep Seated Hazards
Specific Hazard
Design
Concentration
Volume Factor
1
f
2
f
(% CO
2
)
ft.
3
/lb.
m
3
/kg
ft.
3
/lb.
m
3
/kg
Dry electrical hazards in
ge
neral spaces
2
000 ft.
3
) (56.6 m
3
)
50 10 0.62 0.100 1.60
Dry electrical hazards in
ge
neral spaces
> 2000 ft.
3
) (56.6 m
3
)
50 12 .75 0.083 1.33
Record (bulk paper) storage,
du
cts and covered trenches
65 8 0.50 0.125 2.00
Fur storage vaults, dust
colle
ctors
75 6 0.38 0.166 2.66
Note that the Volume Factors given in the table will result in the specified concentration. No
Material Conversion Factor is required, as used for Surface Fire protection.
3-5.3.2 SPECIAL CONDITIONS
As with suppression systems for surface fires, suppression systems protecting potential deep-
seated hazards require additional quantities of carbon dioxide to compensate for openings in
the enclosure, forced air ventilating systems, and abnormally low or high ambient
temperatures. The compensating agent quantities are added to the minimum system agent
quantity in accordance with Paragraph 3-5.2.4.
EXAMPLE 7 - TOTAL FLOODING FOR DEEP-SEATED FIRES - Basic Carbon Dioxide
Quantity
Determine the carbon dioxide quantity required in a bulk paper storage room having
dimensions of 20 ft. by 20 ft. by 10 ft. bulk paper storage room.
From Equation (12):
Where is the Basic Quantity of Agent, is the Volume of the Enclosure, and is the
Volume Factor.
= 20 ft. x 20 ft. x 10 ft.
= 4,000
ft.
3
= 8 ft.
3
/lb. from Table 3-3 for Record (bulk paper) storage
= 4000 
= 500 lb.
L
W
H
W
C
Vf
1
=
W
C
V
f
1
V
V
f
1
W
C
W
C