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FCP-75 Manual —
P/N LS10147-003FK-E:A 3/17/2021
System Operation
Smoke Alarm Verification
10.7.2 Double Interlock Zone Releasing
A Double Interlock Zone uses a minimum of two addressable detectors, a designated manual release switch, and an interlock switch input.
An interlock switch is typically a dry-contact pressure switch and will be referred to as an interlock/pressure switch in this document.
Conditions Required for a Pre-Alert Output Activation
If any single addressable detector is activated, the “Pre-Alert” output will activate. This alerts the user that the initial stages required for a
release condition are present. (Also refer to Table 10.4.)
Conditions Required for a General Alarm Output Activation
If two addressable detectors, a manual release switch is activated, or an interlock switch is active, the “Pre-Alert”, and “General Alarm” out-
puts will activate.
Conditions Required for a Release Output Activation
Any release requires the activation of an interlock switch, and either a manual release switch or 2 activated addressable detectors. When
these conditions are met, the “Release” and “General Alarm” outputs will activate, and the “Alert” output will deactivate.
10.8 Smoke Alarm Verification
Figure 10.2 illustrates how the Smoke Alarm Verification cycle operates.
Figure 10.2 Smoke Verification Cycle
During the Confirmation Period, if there is no alarm indication, then the system will return to normal operation.
!
CAUTION: DETECTOR SPACING
DETECTORS MUST BE INSTALLED AT 0.7 TIMES THE LINEAR SPACING AS DESCRIBED IN NFPA 72
NOTE:
Refer to Table 10.2 for approved releasing solenoids and rating.
Important!
•
Only addressable detectors can be used. No conventional detectors can be used.
•
Each Single Interlock Zone input requires at least one manual release switch.
•
Each Double Interlock Zone input requires at least one Interlock/pressure switch.
Inputs
Output Results
Normal
Pre-Alert
Pre-Alert and General Alarm
Release and General Alarm
1st Addressable
Detector
X
X
X
X
X
X
X
X
2nd Addressable
Detector
X
X
X
X
X
X
X
X
Manual Release
Station
X
X
X
X
X
X
X
X
Interlock/Pressure
Switch
X
X
X
X
X
X
X
X
Table 10.4 Conditions Required for Release Output Activation
