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ESL 500N Series

ESL 500N Series
Smoke Detector

Installation Instructions

WARNING

This document is intended for licensed electricians/
alarm installers. GE Interlogix cannot provide technical
support to unqualified persons.

If you have questions, call GE Interlogix at 1-800-648-7424.

Description

The ESL 500N Series conventional 2-wire and 4-wire photoelectric
smoke detectors have intelligent software and digitally processed
sensing capabilities. This intelligence coupled with the ESL patented
optical sensing chamber means the ESL 500N Series quickly and
accurately detects smoke. CleanMe® compatible software, self-
diagnostics, and dust (drift) compensation are standard in every unit.
The ESL 500N Series offers application flexibility with optional
auxiliary relays, rate-of-rise/fixed temperature heat sensors, isolated
heat sensors and/or 85dBa temporal 3 sounders.
All models ship standard with the following features:

Detector/base lock
Discourages unauthorized removal of the smoke detector by requiring
a screwdriver to remove the detector from the base.

Self-diagnostics
Includes automatic sensitivity testing. Once a day and immediately
upon first power up, each 500N 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.

Drift compensation  (dust compensation)
The detectors automatically adjust sensitivity, up to a maximum of
1.0%/ft., as the detectors become dirty.

Automatic voltage range selection for UL 2-wire compatibility
The 2-wire 500N Series detectors automatically determine if the
detector is connected to a 6/12V panel or a 12/24V panel. There are
no switches to set.

Depending on the model, the smoke detector provides the
following features:

CleanMe®
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 500N
Series 2-wire detectors only.

The 500N Series 2-wire detectors enable the CleanMe function by
recognizing voltage polarity at installation. If the + and - terminal
connections are reversed, the CleanMe function is enabled. New
500N Series detectors are compatible on the same loop with previous
500 Series detectors if proper wiring is observed. See Figure 5.

Integral Temporal 3 Sounder
In the 500N models with sounder, a piezoelectric horn produces an
interrupted 85dBa tone when the detector alarms or when the polarity
is reversed. Sounder follows input voltage in reverse polarity.

In order for all sounders to activate when the panel alarms, the panel
must reverse the supply voltage polarity to the loop on alarm. If the
panel does not implement polarity reversal, an ESL 405 Polarity
Reversal Relay Module must be used. (Refer to the installation
instructions for the ESL 405 Polarity Reversal Relay Module.)

Auxiliary and end-of-line relays
Auxiliary relays are form C and operate at 1A 

@

 30VDC to

allow for the addition of auxiliary notification devices to the
smoke loops. Products with an “R” in the suffix signify the
auxiliary relay feature.

An end-of-line relay operates as a power supervision relay and
is normally energized and will release with the loss of power.
Products with an “E” in the suffix signify the end-of-line
feature.

Heat sensors
Some models come with both a rate-of-rise and fixed tempera-
ture heat sensors which allows the unit to detect changes in
temperature that may signal a fire event. Models with an “XT”
in the suffix have a heat sensor included.

Some models are available with an isolated heat sensor. If the
unit senses a temperature change it will alert the panel and
signal an alarm independent of smoke in the photoelectric
chamber. The heat alarm output is on the alarm relay and the
smoke alarm output is on the auxiliary relay. Models with an
“H” in the suffix have an isolated heat sensor which is both rate-
of-rise and fixed temperature.

Convertible inputs
The 2-wire 500N Series can be converted using the ESL 505
module to a 4-wire input on the control panel. The 500N 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. Up to 20 ESL 500N
Series smoke detectors can be accomodated on each 505
module. See the 505 module installation instructions for more
information.

Compatibility

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
www.sentrol.com for a copy to download. Remember,
4-wire smoke detectors do not require a  compatibility listing.

Figure 1. Detector placement

= Required smoke detectors
= Additional smoke detectors required for new construction

1 A

Dining
Room

Kitchen

Bedroom

Bedroom

Bedroom

Living Room

TV Room

Dining
Room

Kitchen

Bedroom

Bedroom

Bedroom

Living Room

Dining 

Room

Basement

Bedroom

Bedroom

Living 

Room

1 B

1 C

UL

¤

C

LISTED

US

Summary of Contents for 521NB

Page 1: ...odels with sounder a piezoelectric horn produces an interrupted 85dBa tone when the detector alarms or when the polarity is reversed Sounder follows input voltage in reverse polarity In order for all sounders to activate when the panel alarms the panel must reverse the supply voltage polarity to the loop on alarm If the panel does not implement polarity reversal an ESL 405 Polarity Reversal Relay ...

Page 2: ...allways 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 de...

Page 3: ...le simulta neously turning the detector counterclockwise 15 degrees See Figure 7 Figure 5 Wiring diagrams 500N Series 2 wire wiring diagram 2 wire Initiating Circuit Listed Alarm Control First Detector Last Detector EOL Device Model 521NCRXT 521NCSRXT Model 521NB 521NBXT 521NCSXT Note The 500N Series 2 wire detectors are polarity sensitive WARNING The system may not operate if the detector is not ...

Page 4: ...6 Testing the detector Figure 7 Unlocking the detector Figure 8 Removing the detector cap 7 Test the detector sensitivity See Testing the Detector Sensitivity 8 Reconnect all alarm notification appliances service release devices and extinguishing systems Important The control panel alarm and all auxiliary functions should be verified for a complete test of the system Testing the Detector Sensitivi...

Page 5: ...e 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 detector and may be enforced only by such person During the warranty period if the detector or any warranted components thereof becomes defective at the manufacturer s discretion it will be replaced or repaired withou...

Page 6: ...cm deep Reset time 1 second minimum Listings CSFM MEA State of Maryland C UL US UL 268 ULC S531 GE Interlogix Product Ordering 521NBXT Series Listing Features Wiring New Style Model Description Alarm Reverse Current mA Polarity mA 521NB 2 wire photoelectric 6 33 VDC S09A S10A 20 521NBXT 2 wire photoelectric 6 33 VDC fixed temp and rate of rise heat S09A S10A 20 521NCRXT 2 wire photoelectric 8 5 33...

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