What are the pre-discharge and discharge sequences on the FenwalNET-6000 suppression system, and how does the abort function work?

The FenwalNET 6000 follows a three-stage progression for suppression: Pre-Alarm, Pre-Release, and Release. The Pre-Alarm state is a warning triggered by a single detector exceeding a low-level threshold (Page 149) [1].

The Pre-Release state, or countdown state, begins when two automatic detectors in a counting or cross-zoned configuration issue an alarm; this typically triggers a 30-second countdown (Page 112, 149) [1].

The Release state occurs when the countdown expires or a manual-release station is activated, triggering the agent discharge (Page 149) [1].

Abort Functionality Abort switches are momentary, dead-man-type devices that require constant force to remain engaged (Page 112) [1].

They are typically assigned to monitor modules with addresses 106 through 110 (Page 112) [1].

Depending on configuration, the abort function can operate in several ways:

1. Reset the countdown timer to the full initial delay period (Page 112) [1].

2. Hold the timer at the remaining time and resume when released (Page 9) [1].

3. Count down to 10 seconds and hold, resuming at 10 seconds upon release (Page 9) [1].

4. Special NYC operation modes (Page 9) [1].