Default Suppression Release Applications; Suppression Release Triggered By Single Pull Station Or Automatic; Initiating Device; Suppression Release Triggered By Dual Automatic Initiating Devices - Simplex 4010 Applications Manual

Default Suppression Release Applications

Suppression Release
Triggered by Single Pull
Station or Automatic Initiating
Device
Suppression Release
Triggered by Dual Automatic
Initiating Devices
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The application described in this section is used in situations that require the
release of the suppression agent immediately (or slightly delayed by a timer)
after alarm activation. A typical use is for a fueling station equipped with a
manual release station and flame detectors. An important point to note with this
application is that it does not use either an abort switch or a NAC pre-signal that
indicates imminent release of the agent.
As shown in Figure 3-1, activation of a single initiating device – typically a
manual release station or an automatic initiating device such as a flame detector
– triggers a Suppression Release Delay Timer. This optional delay timer, which
is a system option having a range of zero to 30 seconds for a manual release
station or zero to 60 seconds for an automatic initiating device, delays the
activation of the NAC signals and prevents suppression dump. When the timer
expires, both of these actions – NAC signal activation and suppression dump –
occur. (Important Note: If the delay timer is not selected, both NAC signal
activation and the release of the agent immediately follow alarm activation.)
Timer
0-30 for Pull
0-60 for Auto.
DISCHARGE SIGNALS
Pull
Timer
Station or
Expires
Automatic
Initiating
Device
Activated
Figure 3-1. Timeline for Single Device Suppression Release
Some situations require additional verification of an alarm condition (i.e., two
automatic initiating devices must activate) before the release of the suppression
agent can occur.
As shown in Figure 3-2, activation of the second automatic initiating device
triggers an optional timer, which has a range of 0-60 seconds for an automatic
initiating device. When this timer expires, the discharge signals sound and the
solenoid activates, releasing the suppression agent. As with the previous
application, it is important point to note that this application does not include
either an abort switch or pre-signal.
3-2
ALARM ACTIVATION
SOLENOID ACTIVATION
Alarm
Silence
Continued on next page
System
Reset