User's Manual

Design
September 2013 3-24 P/N 81-CO2MAN-001
3-5.4 System Design
3-5.4.1 OCCUPANCY
Carbon dioxide total flooding systems shall not be installed in normally occupied enclosures.
Note: NFPA 12, 2005 Edition, allows use under specified conditions.
Consideration shall be given to the possibility of carbon dioxide drifting and settling into
adjacent places outside the protected area and to the possibility that personnel could be
trapped in or enter into an atmosphere made hazardous by a carbon dioxide discharge.
Safeguards shall be provided to ensure prompt evacuation, to prevent entry into such
atmospheres and to provide means for prompt rescue of any trapped personnel. Personnel
training shall be provided.
= 0 lb.
= 0 lb.
= 0 lb.
=
= 500+0+0+0
= 500 lb.
From Equation (13):
Where is the Minimum Flow Rate to Achieve 30% Within 2 Minutes.
= 0.0214 x
= 0.0214 x 3,000
= 64.2 lb./min
From Equation (14):
Where is the Discharge Time.
= 
= 500 64.2
= 7.8 min
Since > 7 min, the minimum discharge rate must be increased.
From Equation (15):
Where is the Minimum Flow Rate.
= 7
= 500  7
= 71.4 lb./min
W
L
W
V
W
T
Wmin
W
C
W
V
W
L
W
T
+++
Wmin
Wmin
q
30
0.0214 V=
q
30
q
30
V
q
30
q
30
t
d
W
min
q
30
=
t
d
t
d
Wmin
q
30
t
d
t
d
t
d
q
min
W
min
7=
q
min
q
min
Wmin
q
min
q
min