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

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APPENDIX A
3-1-2010 Page A-7
6j – Calculate Total Atomizer Pressure (TAP)
(Continued)
TAP = 115 psi (7.929 bar) – 14.13 psi (.974 bar) + 6.93 psi
(0.478 bar))
TAP = 115 psi (7.929 bar) – (21.06 psi (1.452 bar))
TAP = 93.94 psi (6.477 bar)
When the atomizer is located below the water piping outlet
on the system skid:
Total Atomizer Pressure (TAP) = 115 psi (7.929 bar)
(pressure available at outlet on skid) + (Elevation Head
Loss (EHL) – Total Pipe Pressure Loss (TPPL))
TAP = 115 psi (7.929 bar) – (TPPL – EHL)
For example, assume a system similar to Figure 17 in
which the atomizers are instead installed 12 ft (3.7 m)
below the water supply outlet. Then the TAP calculation
would proceed as follows:
TAP = 115 psi (7.929 bar) – (14.13 psi (.974 bar) - 6.93 psi
(0.478 bar))
TAP = 115 psi (7.929 bar) – (7.20 psi (0.496 bar)
TAP = 107.80 psi (7.433 bar)
STEP NO. 7 – SELECT APPROPRIATE ATOMIZER
ASSEMBLY:
With Total Atomizer Pressure (TAP) calculated, find the
range and corresponding Atomizer Assembly Part No. from
Table 3. From the example in Figure 13, the TAP is 93.94
psi (6.477 bar) (See Step 6j). Referring to the Atomizer
Assembly Selection, the pressure is between 85 to 98 psi
(5.81 to 6.70 bar). Therefore, the correct Atomizer is Part
No. 437333.
Table 3 – Atomizer Assembly Selection
STEP NO. 8 – DETERMINE VOLUME OF WATER SUPPLY
REQUIRED
8a – Determine Volume of Water Piping to Each Hazard
Example:
Supply Line (A) = 38.17 ft (11.634 m) of 3/4 in. pipe to
hazard 1 plus 2 ft (0.610 m) of 3/4 in. pipe in the branch
up to the selector valve for hazard 2 = 40.17 ft (12.247 m)
total.
Branch Line (B) = 15.84 ft (4.828 m) of 1/2 in. pipe
Branch Line (C) = 2.92 ft (.890 m) of 1/2 in. pipe
Branch Line (D) = 19.92 ft (6.072 m) of 1/2 in. pipe
Branch Line (E) = 18.25 ft (5.563 m) of 1/2 in. pipe
Branch Line (F) = 2.92 ft (.890 m) of 1/2 in. pipe
Branch Line (G) = 19.92 ft (6.072 m) of 1/2 in. pipe
Table 4 – Pipe Volume
A. 40.17 ft of 3/4 in. linear pipe length x 0.0278 (from Table
2) = 1.12 gal total volume (12.247 m x 0.344 = 4.213 L
total volume)
B. 15.84 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.26 gal total volume (4.828 m x 0.196 = 0.946 L
total volume)
C. 2.92 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.05 gal total volume (0.890 m x 0.196 = 0.174 L
total volume)
D. 19.92 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.32 gal total volume (6.072 m x 0.196 = 1.190 L
total volume)
E. 18.25 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.29 gal total volume (5.563 m x 0.196 = 1.090 L
total volume)
F. 2.92 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.05 gal total volume (0.890 m x 0.196 = 0.174 L
total volume)
G. 19.92 ft of 1/2 in. linear pipe length x 0.0158 (from Table
2) = 0.32 gal total volume (6.072 m x 0.196 = 1.190 L
total volume)
Nominal US
Pipe Size Gallons/foot Liters/meter
__________ __________ __________
1/2 0.0158 0.196
3/4 0.0277 0.344
1 0.0449 0.558
1 1/4 0.0777 0.965
1 1/2 0.1058 1.314
2 0.1744 2.165
Atomizer Atomizer Assembly
Pressure Range Part No.
_____________ _______________
73-84 psi (5-5.80 bar) 437332
85-98 psi (5.81-6.70 bar) 437333
99-115 psi (6.80-7.9 bar) 437334
116-136 psi (8.00-9.4 bar) 437335
137-163 psi (9.4-11.2 bar) 435877
Selector Valves