Fike Clean Agent System - 3.2 Calculate Agent Required

SECTION 3 – SAMPLE PROBLEM
Page 2 of 17 Fike Clean Agent System w/ FM-200™ UL / ULC Ex4623
Revision Date: January, 2010 Manual P/N: 06-215 (Rev G) FM 3010715
3.2 CALCULATE AGENT REQUIRED
The 6.25% minimum design concentration has been adjusted to 6.5% due to multiple hazards being protected
from a common agent supply. The minimum expected storage temperature of the container in this example is 70°
F (21
o
C).
Note:
Adjusting the design concentration from 6.25% to 6.5% when protecting multiple hazards from a common agent
supply is to help achieve the 6.25% minimum concentration required (in each hazard) when adjusting from a
theoretical orifice size to an actual drill size. This concentration adjustment is a recommendation not a
requirement.
English Units Metric Units
Computer Room / 8613 cf: Computer Room / 243.9m
3
8613 6.5 243.9 6.5
W = 2.2075 X (100 – 6.5) = 272 lbs W = .13781 X (100 – 6.5) = 123.5 kg
UPS Room / 1350 cf: UPS Room / 38.23m
3
1350 6.5 38.23 6.5
W = 2.2075 X (100 – 6.5) = 43 lbs W = .13781 X (100 – 6.5) = 19.5 kg
Operations Room / 2565 cf: Operations Room / 53.52m
3
2565 6.5 72.63 6.5
W = 2.2075 X (100 – 6.5) = 81 lbs W = .13781 X (100 – 6.5) = 37.0 kg
Sub-Floor / 1740.0 cf: Sub-Floor / 49.27m
3
1670.4 6.5 47.30 6.5
W = 2.2075 X (100 – 6.5) = 53 lbs W = .13781 X (100 – 6.5) = 24.0 kg
3.2.1 DETERMINE CONCENTRATION AT MAXIMUM TEMPERATURE
The next step is to check the concentration level, at the maximum temperature that is anticipated within all the
hazard enclosures being protected, in order to verify the concentration achieved is not above the human
exposure limits show in Section 2.3. For this example, we are utilizing a maximum temperature of 90° F.
English Units Metric Units
Computer Room
100 (272 x 2.2994) 100 (123.5 x 0.14355)
C= 8613 + (272 x 2.2994) = 6.509% C= 243.89 + (123.5 x 0.14355) = 6.509%
UPS Room:
100 (43 x 2.2994) 100 (19.5 x 0.14355)
C = 1350 + (43 x 2.2994) = 6.511% C= 38.23 + (19.5 x 0.14355) = 6.511%
Operations Room:
100 (81 x 2.2994) 100 (37 x 0.14355)
C = 1890 + (81 x 2.2994) = 6.508% C= 72.63 + (37 x 0.14355) = 6.508%
Sub-Floor:
100 (53 x 2.2994) 100 (24 x 0.14355)
C = 1670.4 + (53 x 2.2994) = 6.521% C= 47.30 + (24x 0.14355) = 6.521%