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

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APPENDIX A
3-1-2010 Page A-3
DESCRIPTION (Continued)
Design and Limitations
When designing a system using selector valves, some
unique criteria must be considered:
• Where multiple hazards are solely protected by an
AQUSONIC system without a reserve, all hazards must
be shut down upon system activation and cannot be
restarted until the system is recharged.
• Where multiple hazards are protected by an AQUSONIC
system without a reserve, operations in unaffected zones
may continue as long as a secondary fire suppression
system, such as a fixed sprinkler system, is in place and
functioning.
• See requirements for connected reserve in the Main and
Reserve Appendix of this manual.
• When using pneumatic selector valve assemblies, one
solenoid operated valve must be installed on the supply
actuation line for each pneumatic selector valve
assembly.
• For each hazard enclosure, a manual release device
(pneumatic remote actuator or manual electrical pull
station) shall be installed in accordance with NFPA 750.
• To minimize water volume in piping, selector valves
should be as close to the main supply piping as possible.
• When applying selector valves to hazards of different
sizes, the system supply quantities should be based on
the requirements for largest hazard.
Note:
This will produce an extended discharge in the
smaller hazards.
System Calculation Procedure
System calculations are modified as follows when designing
a selector valve system.
Note:
All standard calculations detailed in the design
section of this manual must also be completed along with
the following additional steps:
WATER 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. The volume of the manifold and all water branches up
to the inlet side of the selector valves must be included
in the water volume calculation for each branch of the
system.
3. When calculating the acceptable system pressure loss,
combine the supply line (A) with the branch line (either
B, C, and D or E, F, and G) that has the most pressure
loss.
4. When calculating a potential system, the smallest pipe
size that meets the maximum pressure loss require-
ments will be the optimal size for system performance.
Note: Calculations must be repeated for each zone.
See Figure 5 for an example of a typical calculation.
FIGURE 5
008527
Table 1 – 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 16.17 FT
(4.929 m)
D1 17 FT
(5.2 m)
A2 2 FT
(0.610 m)
A3 3.75 FT
(1.143 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)
3/4 IN.
SELECTOR
VALVE
A5 4 FT
(1.219 m)
A4 12 FT
(3.658 m)