Interlogix 521B install manual
ESL 500 Series
Smoke Detector
Installation Instructions
The ESL 500 Series Smoke Detectors offer 2-wire, 4-wire, 12VDC,
and 24VDC detectors for fire system applications.
Depending on the model, the smoke detector provides the following
Detector/base lock
Discourages unauthorized removal of the smoke detector by requiring
a screwdriver to remove the detector from the base.
Enables the control panel to receive a warning signal via a 505
module, or CleanMe compatible panel, indicating that the optical
chamber needs to be replaced. This feature is available on the 521/
528 Series 2-wire detectors only.
The detectors ship with the CleanMe feature turned off. To turn on
the CleanMe signal move DIP switch 2 on the back of the detector to
the “on” position. See Figure 1.
1. On=A (6-12V) range
Off=C (12-24V) range
1 2
2. On=CleanMe signal on
Off=CleanMe signal off
(521/528 Series only)
Turning the CleanMe signal
on without using the 505
module and/or compatible
panel will create a trouble
Please refer to the ESL Compatibility Index for a complete
listing of control panels and proper identifiers. For a copy
of the Compatibility Index, call 1-800-648-7424 or visit for a copy to down load. Remember,
4-wire smoke detectors do not require a
compatibility listing.
This document is intended for licensed electricians/
alarm installers. Interlogix cannot provide technical
support to unqualified persons.
If you have questions, call Interlogix at 1-800-648-7424.
Selecting a Location
Selecting a suitable location is critical to the operation of smoke
detectors. This equipment should be installed in accordance with
the National Fire Protection Association’s (NFPA) Standard 72.
A-8-1.2.1.a Where to Locate the Required Smoke Detectors in
Existing Construction. The major threat from fire in a family
living unit occurs at night when everyone is asleep. The
principal threat to persons in sleeping areas comes from fires in
the remainder of the unit. Therefore, a smoke detector(s) is best
located between the bedroom areas and the rest of the unit. In
units with only one bedroom area on one floor, the smoke
detector(s) should be located as shown in Figure 2 A.
In family living units with more than one bedroom area or with
bedrooms on more than one floor, more than one smoke detector
is required, as shown in Figure 2 B.
Relay (CRXT) unit only
Correct Incorrect
Figure 1. Switches
Includes automatic sensitivity testing. Once a day and immediately
upon first power up, each 500 Series detector performs a full
diagnostic test that includes a dynamic test of the sensing chamber
and internal electronics. This meets NFPA 72 field sensitivity testing
requirements without the need for external meters.
Living Room
TV Room
Selectable voltage range for UL 2-wire compatibility
The 500 Series 2-wire smoke detectors have a DIP switch that allows
the installer to choose between 12/24V operation and 6/12V
operation. See Figure 1 and Specifications.
Living Room
Drift compensation
The detectors automatically adjust sensitivity, up to a maximum of
1.0%/ft., as the detectors become dirty.
Using the 2-wire 521/528 Series with a panel that does not have 2wire capabilities
The ESL 505 module can convert the 2-wire 521/528 Series to a 4wire input on the control panel. The 521/528 Series is UL Listed as
compatible with the 505 module and will be fully UL compliant with
any UL listed 24 VDC control panel and panels that do not operate
below 12V. Each 505 module will accommodate up to 20 ESL 521/
528 Series smoke detectors. See the 505 module installation
instructions for more information.
Bedroom Bedroom
= Required smoke detectors
= Additional smoke detectors required for new construction
Figure 2. Detector placement
ESL 500 Series
In addition to smoke detectors outside of the sleeping areas, the
installation of a smoke detector on each additional story of the family
living unit, including the basement, is required. These installations
are shown in Figure 2 C. The living area smoke detector should be
installed in the living room or near the stairway to the upper level, or
in both locations. The basement smoke detector should be installed in
close proximity to the stairway leading to the floor above. Where
installed on an open-joisted ceiling, the detector should be placed on
the bottom of the joists. The detector should be positioned relative to
the stairway to intercept smoke coming from a fire in the basement
before the smoke enters the stairway.
A-8-1.2.1.b Where to Locate the Required Smoke Detectors in New
Construction. All of the smoke detectors specified in A-8-1.2.1.a for
existing construction are required and, in addition, a smoke detector
is required in each bedroom.
A-8-1.2.1.c Are More Smoke Detectors Desirable?
The required number of smoke detectors might not provide reliable
early warning protection for those areas separated by a door from the
areas protected by the required smoke detectors. For this reason, it is
recommended that the householder consider the use of additional
smoke detectors for those areas for increased protection. The
additional areas include the basement, bedrooms, dining room,
furnace room, utility room, and hallways not protected by the
required smoke detectors. The installation of smoke detectors in
kitchens, attics (finished or unfinished), or garages is not normally
recommended, as these locations occasionally experience conditions
that can result in improper operation.
Important: Regulations pertaining to smoke detector installations
vary from state to state. For more information, contact your local fire
department or local authority having jurisdiction.
Installing the Detector
All wiring must conform to the National Electric Code (NEC)
and/or local codes having jurisdiction. Use 12 to 24 AWG wire
to install the detector.
If you are using the detector/base lock, remove the detector
knockout and break off the tab on the mounting base. See
Figure 3.
Remove the red plastic cover from the detector. The
detector is shipped with a cover for protection against
construction site dust.
Run system wiring to the detector location and mount
electrical boxes if necessary.
Line up and attach the gasket (if the detector comes with a
gasket) and mounting base to the electrical box, wall or
ceiling using the screws provided. Use the wall anchors if
necessary. See Figure 5.
Strip the system wires and connect them to the appropriate
terminals on the detector. See Figure 6.
Attach the detector to the mounting base as follows:
- Line up the raised tab on the side of the detector with the
arrow on the mounting base. See Figure 4.
- Insert the smoke detector into the base and turn
clockwise approximately 15 degrees. It should snap
firmly into place.
Apply power.
Test the detector. See Smoke Testing the Alarm.
In addition to NFPA 72, use the following location guidelines to
optimize performance and reduce the chance of false alarms from the
Locate ceiling-mounted smoke detectors in the center of a room
or hallway at least 4 inches (10cm) from any walls or partitions.
Locate wall-mounted smoke detectors so the top of the detector
is 4 to 12 inches (10 to 30cm) below the ceiling.
Do not locate detectors in or near bathrooms or kitchens.
Locate in a suitable environment as follows:
- Temperature between 32°F (0°C) and 100°F (37°C)
- Humidity between 0 and 95% non-condensing
Locate away from air conditioners, heating registers, and any
other ventilation source that may interfere with smoke entering
the detector.
Mount smoke detectors on a firm permanent surface.
Figure 4. Mounting
Smoke Testing the Detector
Smoke detectors should be tested in place annually using smoke
or canned aerosol simulated smoke. Follow the instructions on
the canned smoke or use the following steps to test the detector
with smoke:
Figure 3. Detector/base lock
Hold a smoldering punk or cotton wick close to the smoke
entry openings.
Gently direct the smoke into the detector for 20 seconds or
until an alarm is indicated.
Be sure to extinguish the smoke source after testing! The
detector LED should stay on and an alarm should be indicated at
the control panel. Use the system reset switch to reset the
ESL 500 Series
Models with gaskets:
521CRXT, 528CRXT, 541C, 541CXT,
541AXT, 548C, 548CXT, 548 AXT
Models without gaskets:
511C, 511AFT, 518C, 518AFT, 521B,
521BXT, 528B, 528BXT
1 2
1 2
Figure 5. Detector installation
511/518/521/528 Series 2-wire wiring diagram
Listed Alarm Control
Note: The 511/518 Series are not CleanMe
- +
- +
Note: The 521/528 Series are polarity sensitive.
Model 511C/518C
Model 521CRXT/528CRXT
Warning: The system may not operate if the
detector is not connected to the control unit
initiating device circuit as specified in the
detector or control unit literature.
541/548 Series 4-wire wiring diagram
Listed Alarm Control
Note: The 541/548 Series are not
CleanMe compatible
- +
- +
Model 541C/548C
541AXT, 548AXT
Model 541CXT/548CXT
EOL Resistor
Figure 6. Wiring diagrams
Understanding the LED
Removing the Detector
The LED on the detector indicates the status of the detector as
To remove the detector from the mounting base, grasp the
detector and turn it counterclockwise approximately 15 degrees.
The detector should snap off of the mounting base.
Flashing every 9 seconds = Normal operation.
On = Detects smoke, sending an alarm.
Off or flashing once every 1.5 seconds = Trouble or maintenance
is required. Test the detector. See Testing the Detector Sensitivity.
ESL 500 Series
To remove the detector from the mounting base when the
detector/base lock is used, insert a small screwdriver into the
locking tab slot on the side of the base and press in while simultaneously turning the detector counterclockwise 15 degrees. See
Figure 8.
Testing the Detector Sensitivity
The detector provides a sensitivity test that allows you to check the
detector sensitivity using a test magnet and the LED indicator on the
detector as follows:
Hold the test magnet up to the raised TEST letters on the top of
the detector for 2 seconds. See Figure 7. Once the test starts,
the alarm LED flashes one to nine times.
Count the number of times the LED flashes and use the
following table to determine the status of the detector sensitivity
and what action to take, if any.
Unser viceable
hardware fault
Reset unit and rerun
sensitivity test. If the error
persists, replace the unit.
Detector is not
sensitive enough.
Clean the unit. Reset unit
and rerun sensitivity test.
If the error persists,
replace the unit.
Detector is within
normal sensitivity
Detector is too
Verify that the smoke
chamber is snapped
down securely. Clean unit.
After the test:
If the sensitivity is within limits and all other tests pass, the
detector goes into alarm and must be reset from the control panel.
If the sensitivity is not within limits or an unserviceable hardware
fault has been detected, the detector LED flashes every 1.5 seconds
until the detector is serviced.
Figure 7. Testing the detector
Figure 8. Unlocking the detector
Cleaning the Detector
Optical chamber
Optical chamber base
Important: The control panel alarm and all auxiliary functions
should be verified for a complete test of the system.
Figure 9. Removing the detector cap
Clean the detector cover with a dry or damp (water) cloth as needed
to keep it free from dust and dirt.
When necessary, clean the detector interior and replace the optical
chamber as follows:
1. Disconnect the alarm notification appliances, service release
devices and extinguishing systems.
2. Slide a flat-blade screwdriver into the slot on the detector cap
and gently push the handle down to pry the cap up and off. See
Figure 9.
3. Press in on the sides of the optical chamber and pull it up and
away from the detector and discard. See Figure 10.
4. Use a vacuum to remove dust and dirt from the optical chamber
5. Line the new optical chamber up with the optical chamber base
and snap it down into place.
6. Replace the detector cap as follows:
-Line the tabs on the cap with the slots on the detector.
-Insert the cap into the smoke detector and turn clockwise
approximately 15 degrees. It should snap firmly into place.
7. Test the detector sensitivity (See Testing the Detector
8. Reconnect all alarm notification appliances, service
release devices and extinguishing systems.
Detector cap
Figure 10. Removing the optical chamber
ESL 500 Series
Maintaining the Detector
Limited Warranty
These smoke detectors are designed for easy field service and
maintenance. When installed and used properly, they require
minimal maintenance.
The smoke detector should be tested monthly. See Testing the
Detector Sensitivity and Smoke Testing the Detector.
ESL is a brand name of Interlogix, Inc. The manufacturer warrants this
smoke alarm to be free from defects in material and workmanship under
conditions of normal use for a term of 3 years from the date of manufacture.
During the warranty period, if an Interlogix product or any of its components becomes defective, it will be repaired or replaced without charge.
Out-of-warranty units will be repaired at the discretion of the manufacturer,
if not, a card will be forwarded to the customer suggesting a replacement
unit and the cost of that unit.
This warranty does not apply to units which have been subject to abuse,
misuse, negligence or accident, or to which any modifications, alterations
or repairs have been made or attempted.
This warranty is extended only to the original purchaser of the smoke alarm
and may be enforced only by such person. During the warranty period, if
the alarm or any warranted components thereof becomes defective, at the
manufacturer’s discretion, it will be replaced or repaired without charge if
returned in accordance with the following instructions:
Obtain a Return Authorization Number by calling 1-800-648-7422 or 503692-4052, then carefully pack it in a well padded and insulated carton and
return, postal charges prepaid to:
Customer Service
Interlogix, Inc.
12345 SW Leveton Drive
Tualatin, OR 97062-9938
A note should be included advising the nature of the malfunction. Care
must be exercised in the proper packing of alarms returned under this
warranty as Interlogix will not be responsible for warranty repairs to
equipment damaged because of improper packing.
The above warranty is in lieu of all other express warranties, and
implied warranties of merchantability and fitness for a particular
purpose are limited in duration for a period of 3 years from the date of
manufacture. Under no circumstances shall manufacturer be liable to
the purchaser or any other person for incidental or consequential
damages of any nature, including without limitation damages for
personal injury or damages to property, and however occasioned,
whether alleged as resulting from breach of warranty by manufacturer, the negligence of manufacturer or otherwise. Manufacturer’s
liability will in no event exceed the purchase price of the product. Some
states do not allow limitations on how long an implied warranty lasts,
or the exclusion or limitation of incidental or consequential damages,
so the above limitations and exclusions may not apply to you. Unless a
longer period is required by applicable law, any action against
manufacturer in connection with this smoke alarm must be commenced
within one year after the cause of action has occurred.
No agent, employee or representative of the Manufacturer nor any other
person is authorized to modify this warranty in any respect. Repair or
replacement as stated above is the exclusive remedy of the purchase
hereunder. This warranty gives you specific legal rights and you also have
other rights which vary from state to state.
Fire Prevention and Escape
The purpose of an early warning smoke detector is to detect the presence of
fire in its early stages and sound an alarm giving the occupants time to exit
the premises safely.
Avoid Fire Hazards
No detection device can protect life in all situations. Therefore, safeguards
should be taken to avoid potentially dangerous situations as follows:
Do not smoke in bed.
Do not leave children home alone.
Never clean with flammable liquids such as gasoline.
Properly store materials. Use general good housekeeping techniques to
keep your home neat and tidy. A cluttered basement, attic, or other
storage area is an open invitation to fire.
Use combustible materials and electrical appliances carefully and only
for their intended uses. Do not overload electrical outlets.
Do not store explosive and/or fast burning materials in your home.
Even after proper precautions have been taken, fires can start.
Be prepared.
In Case of Fire
In the event of a fire, you should do the following:
Leave immediately. Don’t stop to pack or search for valuables.
In heavy smoke, hold your breath and stay low, crawl if necessary. The
clearest air is usually near the floor.
If you have to go through a closed door, carefully feel the door and door
knob to see if undue heat is present. If they seem cool, brace your foot
against the bottom of the door with your hip against the door and one
hand against the top edge. Open it slightly. If a rush of hot air is felt,
slam the door quickly and latch it. Unvented fire tends to build up
considerable pressure. Be sure all members of the household realize and
understands this danger.
Use your neighbor’s phone or a street fire alarm box to call the fire
department. The job of extinguishing the fire should be left to the
Be Prepared
Practice the following steps to prepare you and your family in the event
of a fire:
Perform fire drills regularly. Use them to assure recognition of an alarm
Draw a floor plan and show two exits from each room. It is important
that children be instructed carefully, because they tend to hide in times
of crisis.
Establish one meeting place outside the home. Insist that everyone meet
there during an alarm. This will eliminate the tragedy of someone
reentering the house for a missing member who is actually safe.
If you have children and/or physically challenged people residing in
your household, use window decals to help emergency personnel
identify the sleeping quarters of these individuals.
Smoke detectors CANNOT provide warnings for fires resulting
from explosions, smoking in bed or other furniture, ignition of
flammable liquids, vapors and gases, children playing with
matches or lighters.
Failure to properly install, test, and maintain a smoke detector
system may cause it to fail resulting in loss of life and/or
ESL 500 Series
Limitations of smoke detectors
Smoke detectors are very reliable, but may not work under all conditions.
No smoke detector provides total protection of life or property. Smoke
detectors are not a substitute for life insurance.
Smoke detectors require a source of power to work.
This smoke detector will not operate and the alarm will not sound if the
detector is not installed properly.
Smoke detectors may not be heard. A sound sleeper or someone who has
taken drugs or alcohol may not awaken if the detector is installed outside a
bedroom. Closed or partially closed doors and distance can block sound.
This detector is not designed for the hearing impaired.
Smoke detectors may not always activate and provide warning early
enough. Smoke detectors only activate when enough smoke reaches the
detector. If a fire starts in a chimney, wall, roof, on the other side of closed
doors, or on a different level of the property enough smoke may not reach
the detector for it to alarm.
Smoke detectors are a significant help in reducing loss, injury and even
death. However, no matter how good a detection device is, nothing
works perfectly under every circumstance and we must warn you that
you cannot expect a smoke detector to ensure that you will never suffer
any damage or injury.
Maximum ripple (pk to pk)
Typical average standby current
Typical alarm current (12/24V)
Aux. relay contacts
Alarm contacts
Photoelectic sensitivity
Operating termperature
Operating humidity range
RFI immunity
Field wiring size
Detector packaging
Heat detector specifications
UL 2-wire compatibility identifier:
521/528 - DIP switch 1 ON
521/528 - DIP switch 1 OFF
Drift compensation adjustment
Detector head dimensions
Mounting dimensions
Reset time
DIP switch 1 ON for standard 12V operation (6.5-20 VDC), polarity sensitive
DIP switch 1 OFF for standard 24V operation (8.5-33 VDC), polarity sensitive
10% (V p-p)
70 uA (12/24V)
up to 60mA max. if not limited by control panel
2A @ 30VDC
500mA @ 36VDC (resistive)
3.1% + 0.5 - 1.0%
32° to 100°F (0° to 37°C)
0 to 95% non-condensing
20V/m minimum; 0-1000MHz
white head and base
12-24 AWG
10 detectors per carton
rate of rise - 15 F/min and >105 F (8.3 C/min and >40.6 C)
S10A, S11A (RX models)
1.0%/ft. max
5 in. (12.7cm) diameter; 2 in. (5cm) height
4.75 in. (12.1cm) diameter; 0.3 in. (0.8cm) height
1 second minimum
UL 268
Product Ordering
2-wire, photoelectric, 6.5-33VDC
2-wire, photoelectric, 6.5-33VDC, rate of rise heat sensor
2-wire, photoelectric, 6.5-33VDC
2-wire, photoelectric, 8.5-33VDC, multi-criteria algorithms, fixed/rate of rise heat
2-wire, photoelectric, 8.5-33VDC, aux. relay, multi-criteria algorithms, fixed/rate of rise heat
4-wire, photoelectric, 8.5-33VDC
4-wire, photoelectric, 8.5-33VDC, multi-criteria algorithms, fixed/rate of rise heat
4-wire, photoelectric, 6-20VDC, multi-criteria algorithms, fixed/rate of rise heat
Module that interprets the 521/528 models CleanMe signal for panel and can convert 2-wire
521models to 4-wire inputs on the panel.
Test magnet in plastic shell for pole mounting
Smoke! in a can® (canned smoke) for functional testing of smoke detectors
Replacement optical chambers (set of 10)
1036205 Rev A 06/01
ESL 500 Series
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF