Specifications

151051 2-1
Section 2
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Requirements
2.1 FCC Warning
This device has been verified to comply with FCC Rules Part 15. Operation is subject to the
two following conditions: (1) This device may not cause radio interference, and (2) This
device must accept any interference received, including interference that may cause undesired
operation.
2.2 Underwriters Laboratories (UL)
The SK-2224 is UL listed as a control unit for use in NFPA 72 systems. If the SK-2224 and
its accessories are to be used as part of a UL installation, carefully read the UL requirements
in this section. For more information on NFPA 72 standards, refer to the NFPA National Fire
Alarm Code, 1996 Edition.
2.2.1 Requirements for All Installations
General requirements are described in this section. When installing an individual device,
refer to the specific section of the manual for additional requirements.
1. All field wiring must be installed in accordance with NFPA 70 National Electric Code.
2. Use UL listed smoke detectors and notification appliances compatible with the SK-2224
from those specified in the Appendix to this manual.
3. If you are using the smoke verification feature:
• Do not use smoke detectors with built-in alarm verification.
• Select "Enhanced Mode" if the installation includes pull stations or water flow
switches.
4. A full system checkout must be performed any time the panel is programmed.
5. UL installations require use of Model 7628 EOL resistor assembly.
2.2.2 Requirements for Local Protected Fire Alarm
Systems
At least one UL listed supervised notification appliance must be used.