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A-1
Appendix A
Compatible Devices
This section of the manual lists devices (smoke detectors and notification appliances) that are
compatible with the SK-4224. Contact Silent Knight if you have a question about whether a
device not listed here is compatible.
A.1
Smoke Detectors
This section of the manual contains information about smoke detectors that are compatible
with the SK-4224.
Note: The maximum number of smoke detectors per zone is determined by both the current draw and the imped-
ance of the smoke detector. If too many smoke detectors are used on any zone, false alarms could occur.
Warning! Do not mix different models or manufacturers of smoke detectors on the input loops.
A.1.1
Enhanced Mode
Enhanced mode allows the installer to use pull stations on a circuit that has been programmed
for Enhanced Alarm Verification. If a single detector goes into alarm it will start the alarm
verification cycle. If a pull station is activated any time during the alarm verification cycle and
after the control panel re-applies circuit power (power will drop for seven seconds to restore
detector during verification), the panel will go into immediate alarm and discontinue the
verification cycle.
SK-4224
Identifier
24F for Class B zones
Voltage Range
16.2-27.3 VDC
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