4098 Heat Detectors; Introduction; Heat Detector Types; Specifications - Simplex 4098 Applications Manual

4098 Heat Detectors

Introduction

This section contains general notes, specifications, and mounting information for the heat
detectors shown in Table 2-2.
WARNING:
Notes:




Heat Detector Types

Fixed Temperature Heat Detectors:
Electronic fixed temperature heat detectors use a fast response, thermistor based design to provide
temperature sensing that quickly, accurately, and consistently identifies when fixed temperatures are
exceeded. For this reason, the fixed temperature detectors are recommended for most applications.
With a UL spacing distance of 60 X 60 feet, the fixed temperature electronic heat detectors replace
both mechanical fixed as well as mechanical ROR heat detectors.
ROR Temperature Heat Detectors:
Electronic Rate-of-Rise (ROR) heat detectors detect fixed temperature alarm thresholds the same as
the fixed temperature heat detectors, plus detect a ROR alarm with a patented ROR detection design
that can quickly respond to sudden temperature variations. Due to the nature of the fast response to
temperature changes, care must be taken for proper installation of ROR heat detectors. ROR heat
detectors should be installed in stable environmentally controlled areas. These detectors must not be
installed where hot or cold air can be blown on them (near ductwork, industrial equipment, air vents
etc.). ROR detectors should not be installed where more then 6 F per minute temperature changes
can normally occur.

Specifications

Features:




Electrical Specifications:





Heat detectors are NOT life-safety devices; USE HEAT DETECTORS
FOR PROPERTY PROTECTION ONLY! For life-safety requirements,
use smoke detectors.
For all heat detectors, provide electronic supervision with battery back-up at the fire alarm
control panel.
Where the possibility of positive airflow from the electrical conduit/junction box exists, seal
the conduit openings with 3M Weatherban #606 (or equivalent), a non-flammable sealing
compound.
Refer to NFPA 72 for application, test, and maintenance requirements.
Rate-of-Rise and Fixed Temperature (see Table 2-2)
Alarm LED
Compatible with 2-Wire Initiating Device Circuits
Current-Limited Alarm State
Typical Standby Current - 80 Microamps
Typical Alarm Current - 40 Milliamps
Maximum Current - 80 Milliamps while in alarm state
Operating Range - 15-32 VDC
Maximum Ripple Voltage Allowed - 30%
firealarmresources.com
2-5
Continued on next page