Notifier NFS2-640/E Operation Manual

Contents

Notifier NFS2-640/E Operation Manual Manual pdf 58 page image

58 NFS2-640/E Operations Manual — P/N 52743:F1 06/16/2011Appendix B: Intelligent Detector FunctionsDescriptions for Intelligent Detector FunctionsNOTE: For instructions on selecting Intelligent Detector Functions, refer to the NFS2-640Programming Manual.Function DescriptionAnalog Display The control panel reads and displays analog information from the 318analog detectors (159 per SLC). The display shows the sensed air atthe detector as a percentage of the alarm threshold for each detector.Sensitivity Adjust Nine selections for manually setting intelligent detector alarm levelswithin the UL range. If using ionization detectors in duct applications,set Sensitivity Adjust to Level 1.Refer to the NFS2-640 Programming Manual for detector sensitivityinformation.Day/Night SensitivityOperationYou can program the system to automatically force smoke detectors tominimum sensitivity during the day. Refer to “Time, Date, and HolidayFunctions” on page 52.Maintenance Alert When compensation reaches the limit of the amount of driftcompensation that can be safely applied, the control panel reports atrouble condition, according to National Fire Alarm Code standards.This condition also activates if the detector remains at very high or verylow measured air levels for an extended time.Automatic Test OperationThe control panel performs an automatic test of each detector every320 minutes. Failure to meet the test limits causes an Auto Test Failtrouble.Type Code SupervisionThe control panel monitors hardware device Type Codes for eachinstalled device at regular intervals (an interval can take up to 40minutes for a full capacity system). If a mismatch of type compared tothe program occurs, the control panel generates a point trouble labeledInvalid Type.LED Control OperationA global program selection to prevent detector LEDs from blinking as aresult of polling during normal operation. A typical application is asleeping area where a blinking light can distract people. As a standardfunction, independent of this programming selection, the control panelallows all LEDs to turn on in alarm.Alarm Verification Timerand Verification CounterOperationThe control panel performs alarm verification on programmedintelligent smoke detectors. The Alarm Verification Timer is a globalprogram selection of 0–60 seconds (ULC installations can not exceed30 seconds). Each detector includes a Verification Counter, whichdisplays the number of times that a detector entered verification but didnot time-out to alarm. The Verification Counter increments to 99 andholds.Table B.1 Intelligent Detector Functions