Tyco Fire Suppression & Building Products ANSUL AQUASONIC, Design, Installation, Recharge, And Maintenance Manual

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APPENDIX A
3-1-2010 Page A-8
STEP NO. 8 – DETERMINE VOLUME OF WATER SUPPLY
REQUIRED (Continued)
8a – Determine Volume of Water Piping to Each Hazard
(Continued)
(A + B + C + D + E + F + G = Total Volume)
1.12 gal (4.213 L) + 0.26 gal (0.946 L) + 0.05 gal (0.174 L)
+ 0.32 gal (1.190 L) + 0.29 gal (1.090 L) + 0.05 gal
(0.174 L) + 0.32 gal (1.190 L) = 2.41 gal (8.977 L)
Note: Do not include equivalent lengths of fittings.
8b – Determine Volume of Water to be Discharged
Determine total volume of water discharged by multiplying
the number of atomizers required by the maximum flow to
each atomizer, multiplied by the duration of the discharge in
minutes.
Example:
4 atomizers X 2.7 gpm (10.22 lpm) X 10 minutes
= 108 gallons (408.8 liters).
8c – Determine Volume of Water Supply Required
Volume of water disc Volume of water pipe to
hazard = Total water required.
Example:
108 gallons (408.8 liters) + 2.41 gallons (8.9
liters) = 110.41 gallons (417.7 liters)
STEP NO. 9 – DETERMINE NUMBER OF WATER TANKS
REQUIRED
Total water required / 50 Gal per tank = Equals number of
tanks
Example:
110.41 gallons (417.7 liters) / 50 gallons (189.28
liter) = 2.21 tanks
Round up to nearest whole number of tanks.
Example: 2.21 tanks round up to 3 tanks
NITROGEN CALCULATION PROCEDURE
PIPING and FITTING NOTES:
1. Lengths A, B, C, D, E, F, and G are determined by
combining linear lengths of Schedule 40 pipe plus
equivalent lengths of schedule 40 fittings.
2. When calculating the acceptable system pressure loss,
combine the supply line (A) with the branch line (either
B and C, or B and D, or E and F, or E and G) that has
the most pressure loss.
3. The maximum difference in pressure loss from the
atomizer with the greatest pressure loss to the atomizer
with the least pressure loss is 20 psi (1.4 bar).
Note:
Calculations must be repeated for each zone.
See Figure 14 for an example of a typical calculation.
FIGURE 6
008526
Table 5 – Equivalent Pipe Length (in feet) For Fittings
Selector
Pipe 90° Elbow 45° Elbow Tee Valves
Size ft (m) ft (m) ft (m) ft (m)
_____ ________ ________ _______ _______
1/2 in 1 (0.305) 0.5 (0.15) 3 (0.91) —
3/4 in 2 (0.61) 1 (0.305) 4 (1.22) 66.5 (20.3)
1 in 2.5 (0.76) 1 (0.305) 5 (1.52) —
1 1/4 in 3 (0.91) 2 (0.61) 6 (1.83) —
1 1/2 in 4 (1.22) 2 (0.61) 8 (2.44) 75.5 (23)
2 in 5.5 (1.68) 3 (0.91) 10 (3.05) —
Selector Valves
G2
2 FT. 11 IN.
(0.9 m)
D2
2 FT. 11 IN.
(0.9 m)
BRANCH TO
HAZARD 2,
2 FT (0.610 m)
A1 20 FT
(6.096 m)
D1 17 FT
(5.2 m)
A2 2 FT
(0.610 m)
A3 4.5 FT
(1.372 m)
B1 9 FT 3 IN.
(2.8 m)
E2 6 FT 7 IN.
(2 m)
B2 6 FT 7 IN.
(2 m)
G1 17 FT
(5.2 m)
E1 11 FT 8 IN.
(3.6 m)
1 1/2 IN.
SELECTOR
VALVE
A5 4 FT
(1.219 m)
A4 12 FT
(3.658 m)
C1
2 FT. 11 IN.
(0.9 m)