12
HELIX™ Manual
(P/N 26291)
Chapter 2: System Components
Rev A (February 2018)
HELIX™
PCU Fire Suppression System
2.4 System Actuation Control Heads
The following control heads can be used for actuation of the
Agent Cylinder Valve, releasing the Dry Chemical Agent
from the Agent Cylinder.
2.4.1 Electric Control Head (P/N 14032
-
R)
The Electric Control Head is used in all electrically only
actuated Amerex Dry Chemical System installations. This
device is constructed of machined brass and bolts directly
to the top of the Agent Cylinder Valve. The body of the
Electric
Control Head is threaded to accept the Linear
Actuator (P/N 20500
-
R) and threaded for electrical conduit
box mounting (3/4” NPT). The base retains the actuator
piston and locking ring. The
Linear Actuator, when
activated, will force the piston inside the Electric Control
Head down to depress the Agent Cylinder Valve stem,
releasing the Dry Chemical Agent. See Section 4.3.1 for
installation instructions.
2.4.2 Pneumatic Control Head (P/N 10147
-
R)
The Pneumatic Control Head is used in all pneumatic only
actuated Dry Chemical System installations using a remote
Electric Nitrogen Actuator through the Pneumatic Actuation
Network. This device is constructed of extruded brass and
bolts directly to the top of the Agent Cylinder Valve. When
supplied with nitrogen actuation pressure from the
Pneumatic Actuation Network through 1/4” NPT female
ports on either side, the piston inside the Pneumatic Control
Head extends and depresses the Agent Cylinder Valve
stem, releasing the Dry Chemical Agent. See Section 4.3.2
for installation instructions.
2.5 System Actuation Accessories
2.5.1 Vent Check (P/N 10173
-
R)
The Vent Check is a safety device that installs into the last
Pneumatic Control Head in a Pneumatic Actuation Network. Its
function is to relieve any slowly accumulating pressure that could
cause the control head to open the Agent Cylinder Valve
prematurely. A Vent Check must be used on all systems that utilize
nitrogen pressure for activation of the Amerex HELIX Fire
Suppression System. The body of the Vent Check is constructed of
machined brass. The inside of the Vent Check contains a spring
and nylon ball. The Vent Check is supplied with a plastic Dust Cap
(P/N 13761), which must be installed on the Vent Check after
installation into the Pneumatic Control Head. See Section 4.3.2 for
installation instructions.
Figure 2.4.1
ELECTRIC CONTROL
HEAD (P/N 14032
-
R)
LINEAR ACTUATOR
(P/N 20500
-
R)
Figure 2.4.2
PNEUMATIC
ACTUATION
NETWORK
PNEUMATIC CONTROL
HEAD (P/N 10147
-
R)
Figure 2.5.1
(3/4” NPT)
