Simplex 4098 Instructions for use

4098 Detectors, Sensors, and Bases
Application Manual
574-709
Rev. H
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Copyright 2000 Simplex Time Recorder Co. All rights reserved.
Printed in the United States of America.
Copyright 2000 Simplex International Time Equipment Co.,Ltd.,
Mississauga, Ontario L4V 1H3 Canada.
All specifications and other information shown were current as of
publication, and are subject to change without notice. No part of this
document may be reproduced or transmitted in any form or by any
means, electronic or mechanical, for any purpose, without the express
written consent of Simplex Time Recorder Company.
Suffix “C” or “CA” following an eight-digit Product ID number denotes
ULC-listed product.
Suffix “E” following an eight-digit Product ID number denotes Global
product. The 2nd suffix identifies market country, models with this suffix
are not UL Listed.
IDNetis a trademark of the Simplex Time Recorder Company.
MAPNETII Communication Net is protected by US Patent No. 4,796,025.
TrueAlarmAnalog Detection is protected by US Patent No. 5,155,468.
TrueAlarmDetector Base is protected by US Patent No. 5,173, 683.
Printed in the United States of America – 980110.
All illustrations of actual detectors, sensors, and bases shown in this publication
are artist’s renditions.
DO NOT INSTALL ANY SIMPLEX PRODUCT THAT APPEARS
DAMAGED. Upon unpacking your Simplex product, inspect the contents
of the carton for shipping damage. If damage is apparent, immediately
file a claim with the carrier and notify Simplex.
ELECTRICAL HAZARD - Disconnect electrical power when making any
internal adjustments or repairs. Servicing should be performed by
qualified Simplex Representatives.
STATIC HAZARD - Static electricity can damage components. Therefore,
handle as follows:
1. Ground yourself before opening or installing components.
2. Keep uninstalled component wrapped in anti-static material at all times.
Copyrights and Trademarks
Cautions and Warnings
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INTRODUCTION.......................................................................................1
Special Considerations for Smoke Detectors and Sensors...................1
Smoke Detector/Sensor Applications ....................................................1
WHERE TO PLACE DETECTORS/SENSORS ........................................2
WHERE NOT TO PLACE DETECTORS/SENSORS ...............................6
PRINCIPLES OF OPERATION.................................................................9
Heat Detector Operation ........................................................................9
Photoelectric Smoke Detectors/Sensors .............................................10
Ionization Smoke Detectors/Sensors...................................................10
4098 SMOKE DETECTORS ...................................................................11
Specifications.......................................................................................12
General Mounting Notes ......................................................................13
4098 HEAT DETECTORS.......................................................................14
Specifications.......................................................................................14
4098 BASES............................................................................................17
Mounting ..............................................................................................17
Wiring...................................................................................................19
4098 TrueAlarm SENSORS ....................................................................24
General Notes......................................................................................24
Specifications.......................................................................................25
Special Applications.............................................................................25
Mounting ..............................................................................................25
4098 TrueAlarm SENSOR BASES .........................................................26
General Notes......................................................................................26
Specifications.......................................................................................26
Setting the Base’s Address..................................................................26
Address Setting for the 2120 CDT System..........................................28
Address Setting for the 4010, 4020, 4100+, or 4120 System ..............28
Multi-Sensor Bases 4098-9795 and 4098-9796 ..................................31
Wiring...................................................................................................31
4098 TrueAlarm QuickConnect SMOKE SENSORS ..............................34
Overview ..............................................................................................34
General Notes......................................................................................34
Specifications.......................................................................................34
Setting the Sensor’s Address...............................................................35
Mounting ..............................................................................................36
Wiring...................................................................................................37
ACCESSORIES.......................................................................................38
Relay Modules .....................................................................................38
Remote LED Module............................................................................40
COMPATIBILITY .....................................................................................41
4098 Detectors and Detector Bases....................................................41
4098 Sensors and Sensor Bases ........................................................42
MAINTENANCE AND TESTING .............................................................43
Maintenance ........................................................................................43
Testing .................................................................................................43
Cleaning...............................................................................................47
Trouble Indications for TrueAlarm Sensors .........................................49
Fire Alarm Trouble & Maintenance Log...................................................51
Table of Contents
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The purpose of this publication is to provide information concerning the proper
application of both heat and smoke detectors and sensors in conjunction with fire
alarm systems.
The information in this publication is intended to be used only as a technical
guide. The requirements of applicable codes and standards, as well as directives
of Authorities Having Jurisdiction (AHJs), should be followed.
Before installing detectors/sensors, make a survey of the area to be covered in
accordance with information provided in NFPA 72, Chapter 5 (an excerpt of
which is provided below). For specific applications, refer to Simplex
publication Common Code Requirements For Fire Alarm Systems (Publication
No. FA2-91-010). For additional information, refer to NFPA 72 and the NEMA
Guide for Proper Use of System Smoke Detectors.
Refer to each individual section shown in the Table of Contents for information
on specific products.
• Is there human occupancy?
• Contents to be protected.
• Type of construction and use.
• Burning characteristics of contents.
• Air movement - stratification.
• Deflections and obstructions.
• Height of ceilings.
• Surface conditions of ceilings.
• Type of ceiling construction.
• Total area.
• Vent locations - velocities - dilution.
Each detector/sensor is capable of providing up to 900 square feet (84 square
meters) of coverage, depending on:
1. Requirements of local codes.
2. Results of engineering evaluation.
3. Physical characteristics of protected area. For examples refer to the
following paragraphs of NFPA 72, National Fire Alarm Code 1999:
• 5-2.4.3 Beam Construction (for heat detector/sensors)
• 5-3.4.6.1 Flat Ceilings and 5-3.4.6.2 Sloped Ceilings
• A-5-3.4.6
INTRODUCTION
Special Considerations for
Smoke Detectors and Sensors
Smoke Detector/Sensor
Applications
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Important: The guidelines in this section are adapted from standards published
by the National Fire Protection Association, Quincy,
Massachusetts, U. S. A. These standards include NFPA 72,
“National Fire Alarm Code”; NFPA 70, “National Electrical
Code”, Article 760; and NFPA 90A, “Standard for the Installation
of Air Conditioning and Ventilating Systems.”
To provide effective early warning of a developing fire situation, smoke
detectors/sensors should be installed in all areas of the protected premises. Total
coverage as defined by NFPA 72 should include all rooms, halls, storage areas,
basements, attics, lofts, and spaces above suspended ceilings including plenum
areas utilized as part of the HVAC system. In addition, this should include all
closets, elevator shafts, enclosed stairways, dumbwaiter shafts, chutes and other
subdivisions and accessible spaces.
Fire detection systems installed to meet local codes or ordinances may not be
adequate for early warning of the fire. Some codes or ordinances have minimum
objectives such as capturing elevators or preventing circulation of smoke
through HVAC systems instead of early detection of fire.
You should weigh the costs against the benefits of installing a complete fire
detection system when any detection system is being installed. The location,
quantity and zoning of detectors/sensors should be determined by what
objectives are desired rather than the minimum requirements of any local codes
or ordinances.
Detectors/sensors may be omitted from combustible blind spaces when any of
the following conditions prevail:
• Where the ceiling is attached directly to the underside of the supporting
beams of a combustible roof or floor deck.
• Where the concealed space is entirely filled with noncombustible insulation.
(In solid joist construction, the insulation need only fill the space from the
ceiling to the bottom edge of the joist of the roof or floor deck.)
• Where there are small concealed spaces over rooms, provided the space in
question does not exceed 50 square feet (4.6 square meters).
• In spaces formed by sets of facing studs or solid joists in walls, floors, or
ceilings where the distance between the facing studs or solid joists do not
exceed 6 inches (15 cm).
Continued on next page
WHERE TO PLACE DETECTORS/SENSORS
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Detectors/sensors may also be omitted from below open grid ceilings where all
of the following conditions are met:
• The openings of the grid are at least 1/4 inch (6 mm) in the smallest
dimension.
• The thickness of the material does not exceed the smallest of the grid
openings.
• The openings constitute at least 70% of the area of the ceiling material.
Detectors/sensors are usually required or recommended underneath open loading
docks or platforms and their covers, and in accessible underfloor areas in
buildings without basements. Detectors/sensors may be omitted from
combustible blind spaces when all of the following conditions prevail:
1. The space is not accessible for storage purposes, it is protected against the
entrance of unauthorized persons, and it is protected against the
accumulation of windblown debris.
2. The space contains no equipment/structures (such as steam pipes, electrical
wiring, ducts, shafts, or conveyors) that could potentially ignite or conduct
the spread of fire.
3. The floor over the space is tight.
4. Non flammable liquids are processed, handled, or stored on the floor above
the space.
“Total coverage,”as described in NFPA 72, is the definition of a complete fire
detection system. In some of the specified areas of coverage, such as attics, closets,
under open loading docks or platforms, a heat detector may be more appropriate
than a smoke detector. Careful consideration should be given to the detector
manufacturer’s instructions and the following recommendations in this guide.
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WHERE TO PLACE DETECTORS/SENSORS, Continued
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In general, when only one detector/sensor is required in a room or space, the
detector/sensor should be placed as close to the center of the ceiling as possible.
Central location of the detector/sensor is best for sensing smoke and/or fire in any
part of the room. If a center location is not possible, it may be placed no closer
than 4 inches (10 cm) from the wall, or if listed for wall mounting, it may be
mounted on the wall. Wall mounted detectors/sensors should be located
approximately 4 to 12 inches (10 to 30 cm) from the ceiling to the top of the
detector, and at least 4 inches (10 cm) from any corner wall junction (see Figure 1).
4 in
(10 cm)
Minimum
12 in
(30 cm)
Maximum
Never here
Top of the detector
acceptable here
Side
wall
Acceptable here
Ceiling
Note:
Measurements shaown are to the
closest edge of the detector.
4 in
(10 cm)
Figure 1. Wall and Ceiling Mounted Detector/Sensor
When an air supply and/or an air return duct opening is present in a room or
space, the detector/sensor(s) should be placed in the path of the air flow toward
the return air duct opening (see Figure 2).
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WHERE TO PLACE DETECTORS/SENSORS, Continued
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Return
air Correct Supply air Incorrect
Figure 2. Detector Placement - Air Supply and/or Return Ducts
Smoke tests are helpful in determining proper placement. Special attention
should be given to smoke travel directions and velocity, since either can affect
detector/sensor performance.
Placement of a detector/sensor near air conditioning or incoming air vents can
also cause excessive accumulation of dust and dirt on the detector/sensor. This
dirt can cause the detector/sensor to malfunction and cause nuisance alarms.
Detectors/sensors should not be located closer than 3 feet (0.9 m) from an air
supply diffuser.
Spot type detectors/sensors, in properly engineered systems, may also be placed in
return air ducts, or in approved duct detector housings designed for this application.
Although duct detectors are not a substitute for open area detectors, they can provide
an effective method of initiating building control functions to prevent smoke from
being transported from the fire area to other parts of a building.
WHERE TO PLACE DETECTORS/SENSORS, Continued
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One of the major causes of nuisance alarms is improper placement of
detectors/sensors. The best way to avoid nuisance alarms is to not install
detectors/sensors in environments that can cause them to malfunction. See Table 1
and examples given below.
Table 1. Environmental Conditions that Influence Detector Response*
Detection
Protection
Air Velocity
>300′(91.4m)
/min.
Atm. Pressure
3000′(914m)
Above Sea
Level
Humidity
>93%RH
Temp. <32°F (0°C)
>100°F (38°C)
Color
of
Smoke
Ion X X X X O
Photo O O X X X
Beam O O X X O
Air
Sampling
O O X X O
* See Table A-5-3.6.1.1 in NFPA 72
X = May affect detector/sensor response
O = Generally does not affect detector/sensor response
DO NOT PLACE DETECTORS/SENSORS:
• In excessively dusty or dirty areas, such as feed rooms, steel mills, etc. Dust
and dirt can accumulate on the detector/sensor’s sensing chamber and make it
overly sensitive, or block the air entrances to the sensing chamber and make the
detector/sensor less sensitive to smoke. Be especially careful to avoid areas
where fumigants, fog or mist-producing materials, or sweeping and cleaning
compounds are used. These substances may cause nuisance alarms.
• Outdoors, in stables, open storage sheds, or other open structures affected
by dust, air currents, or excessive humidity and temperature.
• In damp or excessively humid areas, or next to bathrooms with showers.
Water droplets can accumulate inside the sensing chamber and make the
detector/sensor overly sensitive. A tremendous amount of humid air is
produced during a hot shower. The moisture in this humid air can enter the
sensing chamber as water vapor, then cool and condense into droplets that
can cause a nuisance alarm.
• In elevator lobbies over ashtrays or where people will smoke while waiting
for the elevator.
Continued on next page
WHERE NOT TO PLACE DETECTORS/SENSORS
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DO NOT PLACE DETECTORS/SENSORS:
• In very cold or very hot environments, or in unheated buildings or rooms
where the temperature can fall below or exceed the operating temperature
range of the detector/sensor. At temperatures below 32°F (0°C), ice
crystals or condensation can appear inside the sensing chamber and make it
overly sensitive or cause a nuisance alarm. At temperatures above the
operating range of the detector/sensor, greater than 120°F (49°C), its
internal components may not function properly.
• In or near areas where combustion particles are normally present, such as in
kitchens or other areas with ovens and burners; in garages, where particles
of combustion are present in vehicle exhausts; within 15 feet (4.5 meters) of
any type of furnace, hot water heater, or gas space heater; or in welding
shops or other types of work areas where some form of combustion is used
in the activity normally conducted in that area. When a detector must be
located in or adjacent to such an area, a fixed temperature heat detector may
be appropriate.
• In air streams passing by or through kitchens. Air often enters a residence
or a residential unit of an apartment building through cracks around the front
and/or back doors. If the air return is in the bedroom hallway or in the
bathroom, and if air from the kitchen easily enters the air stream going from
the door to the air return, combustion particles from cooking can cause
nuisance alarms. Install detectors/sensors so that they protect the bedrooms,
but so they are out of the air stream.
• In or near manufacturing areas, battery rooms, or other areas where
substantial quantities of vapors, gases or fumes may be present. Strong
vapors, like excessive humidity, can make detectors/sensors overly sensitive
or less sensitive than normal. In very large concentrations, gases heavier
than air, such as carbon dioxide, may make detectors/sensors more sensitive,
while gases lighter than air, such as helium, may make them less sensitive.
Aerosol particles may collect on detector/sensor chamber surfaces and cause
nuisance alarms.
• Insect-infested areas. If insects enter a detector/sensor’s sensing chamber,
they can cause a nuisance alarm. Take proper insect eradication procedures
before installing detectors/sensors in such locations. If spraying is done, do
not allow insect spray to enter the detectors/sensors.
• Near fluorescent light fixtures. Electrical noise generated by fluorescent
light fixtures may cause nuisance alarms. Install detectors/sensors at least
1 foot (0.3 meters) away from such light fixtures.
Continued on next page
WHERE NOT TO PLACE DETECTORS/SENSORS, Continued
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Underwriters Laboratories (UL) has three standards for smoke detectors: one for
duct detectors/sensors, UL 268A; one for single and multiple station
detectors/sensors, UL 217; and one for system type detectors/sensors, UL 268.
Detectors/sensors should only be used in the applications for which they are
specifically listed.
The 1997 NFPA 101 Life Safety Code notes in Section 7-6.2.10, that single
station smoke detectors shall sound an alarm only within an individual living
unit or similar area and shall not actuate the building fire alarm system.
Section 7-6.1.5 states, “All systems and components shall be approved for
the purpose for which they are installed.”
In addition to possible code noncompliance, the following deficiencies would
exist in a series of residential smoke detectors connected in a fire alarm
system mode:
• Since the fire alarm system is not supervised, vandals or others could
disconnect a detector or the entire system, leaving a building without
protection. The residents would be unaware of the serious life threatening
condition.
• Residential detectors do not latch in alarm. In other words, the detector
self-resets. One detector in alarm will sound all the detectors connected
together. It would be difficult to identify or locate a specific detector that
initially put the system into alarm after the alarm condition was cleared.
System detectors/sensors latch in alarm. They do not reset until power is
momentarily disconnected. This makes it convenient to identify the location of
the detector/sensor that caused the control panel to alarm. In addition, system
detectors are specifically designed to connect to a supervised control panel.
Two-wire detectors require a UL compatibility review to verify that the detector
and panel properly operate together. A typical life safety fire alarm system for
an apartment complex would be to use system detectors/sensors and manual fire
alarm stations in the hallways and common areas of the complex and residential
single station type detectors and heat detectors in the individual apartments. The
system detectors/sensors, manual stations and heat detectors would be connected
to a supervised control panel, sound a general alarm and automatically notify the
proper authorities that a fire condition exists. The residential detectors located
in the apartments would be interconnected only within the individual living
quarters of each apartment. These residential units would sound an alarm only in
the apartment unit.
WHERE NOT TO PLACE DETECTORS/SENSORS, Continued
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This section describes how the different types of detectors and sensors work.
For additional information on TrueAlarm sensor operation, refer to the
TrueAlarm Concepts publication (PER-91-024).
The heat detector senses the heat or the rate-of-rise in the air temperature of the
environment in which it is located. The heat detector is comprised of electronic
circuitry and a mechanical package that is designed to sense the rate-of-rise of
the air temperature in an expedient and reliable fashion. Upon detection of an
abnormal increase in air temperature, or rate-of-rise in air temperature, the
electronics indicate an alarm by increasing the amount of current draw from the
monitor zone it is connected to. The monitor zone is a supervised detection
circuit that is tied back to a main control panel that takes appropriate action to
indicate an alarm has been reported, if the zone current is substantially increased.
Being of an electronic design, the temperature of the air is sensed by using two
negative temperature coefficient thermistors. The resistance of the thermistors
goes down with an increase in temperature. One thermistor is placed in a
position such as to sense the open air temperature very rapidly (RT1). The
second thermistor is positioned in a small cavity that protrudes out from the main
body of the detector (RT2). The location of RT2 allows for fast detection of a
quick change in the air temperature, but yet for a slow or medium rate of
temperature change, the detector will not trip due to the rate-of-rise feature. For
a slower change in temperature, the detector trips into alarm due to a set fixed
temperature that is sensed by RT1. For a fast temperature rise, when a
difference in temperature sensed by RT1 and RT2 has reached a predetermined
amount, the detector trips into alarm.
Continued on next page
PRINCIPLES OF OPERATION
Heat Detector Operation
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These devices operate on a light scattering principle. The smoke sensing
chamber contains an infrared LED source with a peak spectral emission of 880
nanometers. This source is placed at an angle from a spectrally matched
photodiode receiver. During a NO SMOKE condition, only light reflected from
the chamber walls enters the receiver and shows up as a small photocurrent. As
smoke particles enter the sensing chamber and cross the light beam of the LED,
more light reaches the receiver due to scattering. The receiver circuitry converts
this photocurrent into a signal voltage. In a detector, when this voltage reaches a
preset level, an alarm is produced. In a sensor, this signal voltage goes into an
8-bit, A to D (analog to digital) converter. A digital representation of this signal
voltage is then transmitted to the fire alarm panel for further processing.
These devices use a small radiation source, Americium-241, which emits alpha
particles that ionize air molecules between two electrically charged electrodes.
With the application of a DC voltage to these electrodes, a small ionization
current flows within the chamber. As smoke enters the chamber, a decrease in
ionization current results. This current is converted into a signal voltage by a
transimpedance circuit. In a detector, when this signal voltage drops below a
preset level, an alarm is produced. In a sensor, this signal voltage goes into an
8-bit A to D (analog to digital) converter. A digital representation of this signal
voltage is then transmitted to the fire alarm panel for further processing.
PRINCIPLES OF OPERATION, Continued
Photoelectric Smoke
Detectors/Sensors
Ionization Smoke
Detectors/Sensors
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This section contains specification and mounting information for the smoke
detectors shown in Table 2.
CAUTION: Install the detectors described in these instructions in accordance
with applicable NFPA standards, local codes, and the Authorities
Having Jurisdiction (AHJs). Failure to follow these instructions
may result in failure of the detector to initiate an alarm condition.
Simplex is not responsible for detectors that have been improperly
installed, tested, or maintained.
Limitations of Smoke Detectors: The smoke detectors used with these
bases are designed to activate and initiate emergency action, but will do so only
when used in conjunction with other equipment. They are designed for
installation in accordance with NFPA 72 National Fire Alarm Code 1999.
Smoke detectors will not work without power. AC or DC powered smoke
detectors will not work if the power supply is cut off for any reason.
Smoke detectors will not sense fires when smoke does not reach the detectors.
Smoke from fires in chimneys, in walls, on roofs or on the other side of closed
doors may not reach the smoke detector and alarm it.
A detector may not detect a fire developing on another level of a building. For
this reason, detectors should be located on every level of a building.
Smoke detectors have sensing limitations, too. Ionization detectors are better at
detecting fast, flaming fires than slow, smoldering fires. Photoelectric detectors
sense smoldering fires better than flaming fires. Because fires develop in
different ways, and are often unpredictable in their growth, neither type of
detector is always best, and a given detector may not always provide warning of
a fire. In general, detectors cannot be expected to provide warning for fires
resulting from inadequate fire protection practices, violent explosions, escaping
gases, improper storage of flammable liquids like cleaning solvents, other safety
hazards, or arson.
Smoke detectors cannot last forever. Smoke detectors contain electronic parts.
Even though detectors are made to last for many years, any of these parts could
fail at any time. Therefore, test your smoke detector system per NFPA 72 at
least annually. Clean and take care of your smoke detectors regularly.
Continued on next page
4098 SMOKE DETECTORS
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Table 2. Smoke Detector Specifications
Specifications Smoke Detector Data
Detector PID
(4098) -9601, -9605, -9602 -9603
Type of Detector Photoelectric Photoelectric
with Heat Ionization
Working Voltage
(2-wire) 8.5 –33 VDC 8.5 –33 VDC 8.5 –33 VDC
Rated Voltage
(4-wire) 15 –32 VDC 15 –32 VDC 15 –32 VDC
Input Ripple
Voltage 25% Max. 25% Max. 25% Max.
Max. Alarm
Current 86 mA 86 mA 86 mA
Surge Current <200 µA <200 µA <200 µA
Standby Current <100 µA <100 µA <100 µA
Heat Element
Rating N/A 135°F N/A
Humidity Range
(Non-Condensing) 10-95% RH 10-95% RH 10-95% RH
Air Velocity
Range 0-2000 FPM 0-2000 FPM
0-300 FPM: UL
0-200 FPM :
Recommended
Continued on next page
4098 SMOKE DETECTORS, Continued
Specifications
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All smoke detectors identified in Table 2 mount to a detector base (refer to the
4098 Detector Bases section of this publication for more information). Use the
following considerations and Figure 3 when mounting smoke detectors.
IMPORTANT: Smoke must enter the chamber of the detector. Thus, air flow,
air stratification, air velocity, air stagnation, and air migration
will affect detector efficiency. Therefore:
• Do not install detectors in areas where temperatures are likely to exceed
100°F (38°C) or fall below 32°F (0°C).
• Because the 4098-9602 detector combines heat sensing, DO NOT install
this detector in locations where the ambient temperatures exceed 100°F
(38°C) or where temperature fluctuations above 6°F/min. occur.
• Do not install detectors on a ceiling within 4 inches (10 cm) of a wall.
• Do not install detectors where forced air ventilation may dilute the
smoke before it reaches the detector.
• Do not install detectors in areas where smoke is normally present
(kitchens, furnace rooms, laundry rooms, loading docks, rooms with
fireplaces, rooms with candles, soldering rooms, etc.).
• Do not install detectors in areas where there is likely to be steam (in
hospital patient rooms with vaporizers, near shower rooms, above large
sinks, etc.).
• Do not install detectors above ashtrays in elevator lobbies.
• Wall-mounted detectors should be located 4 to 12 inches (10-30.5 cm)
from the ceiling to detector head.
• Protect all detector heads during construction to avoid infiltration of
construction debris! Remove any protective covers before activating
the system.
• If using the adapter plate, tighten the mounting screws without warping
the adapter plate.
4098 SMOKE DETECTORS, Continued
General Mounting Notes
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This section contains general notes, specifications, and mounting information for
the heat detectors shown in Table 3.
WARNING: Heat detectors are NOT life-safety devices; USE HEAT
DETECTORS FOR PROPERTY PROTECTION ONLY! For
life-safety requirements, use smoke detectors.
General Notes:
1. For all heat detectors, provide electronic supervision with battery back-up at
the fire alarm control panel.
2. 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.
3. Refer to NFPA 72 for application, test, and maintenance requirements.
Fixed Temperature Heat Detectors
Simplex 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
will replace both mechanical fixed as well as mechanical ROR heat detectors.
ROR Temperature Heat Detectors
Simplex electronic rate-of-rise heat detectors detect fixed temperature alarm
thresholds the same as the fixed temperature heat detectors, plus detect a rate-of-
rise alarm with a patented rate-of-rise 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. Rate-of-rise 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.). Rate-of-rise
detectors should not be installed where more then 12 deg. F per minute
temperature changes can normally occur.
FEATURES:
• Rate-of-Rise and Fixed Temperature (see Table 3)
• Alarm LED
• Compatible with 2-Wire Initiating Device Circuits
• Current-Limited Alarm State
ELECTRICAL SPECIFICATIONS:
• 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%
Continued on next page
4098 HEAT DETECTORS
Heat Detector Types
Specifications
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