User's Manual

Installation
P/N 81-CO2MAN-001 4-49 September 2013
4-5.3.2 N
2
PRESSURE OPERATED SIREN
The N
2
pressure operated siren (Figure 4-39) shall be located in accordance with the
installation plan. Connect the N
2
siren in accordance with requirements corresponding to the
siren driver cylinder noted in Table 4-6:
• Never connect a pipe supplying CO
2
to the N
2
pressure operated siren.
•The N
2
siren supply line shall start from a dedicated siren driver cylinder, which is separate
from the system nitrogen pilot cylinder.
• Typically located inside the protected space.
• Install a dirt trap and union as shown in Figure 4-39.
Table 4-6. Siren Driver Cylinder Actuation Limits
Pilot Cylinder
Size
Siren Part
Number
Number of
Sirens per
Siren Driver
Maximum
Length of 1/4
in. Sch. 80
Pipe
Maximum
Length of 1/4
in. Sch. 40
Pipe
Maximum Length
of 5/16 in. x
0.032 in. Wall
Tubing
108 cu. in. 90-981574-001 1 90 ft. 90 ft. 90 ft.
1040 cu. in. 90-981574-001 4 500 ft. 500 ft. 500 ft.
2300 cu. in. 90-981574-001 10 500 ft. 500 ft. 500 ft.
2 x 2300 cu. in. 90-981574-001 20 500 ft. 500 ft. 500 ft.