IFP-75/IFP-75HV Installation/Operation Manual — P/N LS10147-001SK-E:D 06/25/2021 115
Releasing Operations System Operation
Conditions required for an General Alarm and Release Output Activation
If two or more addressable detectors, or a manual release switch activate, the “Alarm” and the “Release” outputs will activate.
(Also refer to Table 10.5.)
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 10.5.)
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 “Gen-
eral Alarm” outputs 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 detec-
tors. When these conditions are met, the “Release” and “General Alarm” outputs will activate, and the “Alert” output will
deactivate.
Inputs Output Results
1st Addressable Detector
X X X X
2nd Addressable Detector
X X X X
Manual Release Station
X X X X
Normal Pre-Alert Release and General Alarm
Table 10.5 Input Conditions and Output Results
CAUTION: DETECTOR SPACING:
THE DETECTORS MUST BE INSTALLED AT 0.7 TIMES THE LINEAR SPACING AS DESCRIBED IN NFPA 72.
NOTE 1: Refer to Table 10.4 for a list of the approved releasing solenoids and rating.
NOTE: 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
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
Normal Pre-Alert Pre-Alert and General Alarm Release and General Alarm
Table 10.6 Double Lock Zone Operation
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