User's Manual

Installation
September 2013 4-48 P/N 81-CO2MAN-001
4-5.3 Pressure Operated Sirens
Either CO
2
pressure operated sirens or Nitrogen pressure operated sirens may be used with
the CO
2
suppression system. However, the installation requirements for each siren style are
unique. Refer to the following sections for proper installation guidance for each style.
4-5.3.1 CO
2
PRESSURE OPERATED SIREN
The CO
2
pressure operated siren (Figure 4-39) shall be located in accordance with the
installation plan. Connect the CO
2
siren to the pilot piping with 1/2-inch schedule 40 pipe.
When used with a CO2 discharge delay, the siren supply line shall be installed upstream of
the CO2 discharge delay.
Typically located inside the protected space.
Install a dirt trap and union as shown in Figure 4-39.
Maximum 250 feet of 1/2-inch pipe between the Siren and the manifold.
Figure 4-39. Pressure Operated Siren
1/2 in. UNION
FILTER
NOZZLE
2-7/16 in. (62 mm)
MOUNTING HOLES
TYPICAL
DIRT TRAP
1/2 in. PIPE NIPPLE, 3 in. (76 mm) LONG
PIPE CAP