Instruction Manual &Technical Bulletin ofExplosion-proof Photoelectric Smoke Detector
FLS-02EC(-H2)

Thank you very much for purchasing. This
Instruction manual contains the important points inpreventing accidents and how to handle it. Please doread thoroughly and comprehend this manual.
After reading it, please keep it in a convenient placefor reference.

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Contents
1.

OVERVIEW ................................................................................................................................ 3

2.

FEATURE ................................................................................................................................... 33.

SPECIFICATION ....................................................................................................................... 3

4.

STRUCTURE.............................................................................................................................. 4

5.

OPERATION .............................................................................................................................. 5
5.1.

Status LED ............................................................................................................................. 5

5.2.

Relay ....................................................................................................................................... 5

5.3.

Automatic Test Function......................................................................................................... 5

6.

INSTALLATION ......................................................................................................................... 5
6.1.

Installation Environments...................................................................................................... 66.2.

Mounting ................................................................................................................................. 6

6.3.

Wiring ..................................................................................................................................... 7

6.3.1.

Specification .................................................................................................................... 7

6.3.2.

Procedure ......................................................................................................................... 77.

MAINTENANCE AND INSPECTION ......................................................................................10

8.

ORDERING INFORMATION.................................................................................................... 119.

CONTACT US............................................................................................................................ 11ES1666

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Warranty Period and Warranty Scope【Warranty Period】
Warranty of the product is valid for only malfunctions occurring in the course of normal and correct
use of the product as per the Instructions Manual, and warranty period is 1 (one) year after the
product is delivered to the consignee specified at the time of order placement.
【Warranty Scope】
For the malfunctions occurring in the product due to reasons attributable to the supplier in the
aforementioned warranty period, supplier will repair the returned product at its own responsibility.
However, the following cases are excluded from the warranty scope.
1.

Malfunctions and loss due to fire, earthquake, flood, lightning, and other natural disasters.

2.

Malfunctions and loss due to inappropriate handling during movement and transportation atcustomer’s side after the product delivery.

3.

Root cause of the malfunction is not attributable to the product.

4.

Malfunction and loss due incorrect use of the product, or if repair, remodeling, erroneousconnection etc by other vendor.

5.

Wear and tear of relay connections, and life span of relay parts due to welding.

Also, warranty here refers to warranty for the delivered product only, and does not cover damages
resulting from the malfunction of the product.

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1.

OVERVIEW

FLS-02EC(-H2) Explosin Proof Smoke Detector has Division and Zone explosion-proof ratings. Thisdetector is a sensor of the smoke using the scattered light, detecting the scattering of the lightreflected by the smoke. There are light emitter (Infrared LED) and the detector (photo-diode) inside,
the former emits the light through the lens, and the latter detects the light scattered by smoke todetect the smoke in the hazardous area. This detector outputs include a localized LED, and relays.
An example of the installation location of this detector is as follows:Battery rooms

Combustible storage facilities



Chemical plantsEngine room, etc

2.

FEATURE

Since the structure is pressure-resistant, explosion-proof, it can be fitted in a hazardous areaIt also tolerates the hydrogen explosion.

FM Approved for use in Class I, Division 2 hazardous locations. and FM Approvals for smoke
detector.

IECEx & ATEX Zone approved

LED provides detector status.

3.

SPECIFICATION
Type
RatingRange of the voltage
Alarm Level
Status LED
Electronic
specification
Output Relay
OperatingStorge
Range of the operation
humidity
external dimensions
materialcolor
WeightRange of thetemperature

Mechanicalspecification

Certification(Standard)
FLS-02EC(Hydrogen gas compatible) FLS-02EC-H2
DC24V,5mA(Standby),10mA(Alarm)
DC24V±10%
1.8 to 3.1 %/ft
Color : Red
Normal : Blinks once in 10 seconds
Alarm : Blinks once in 2 seconds
Trouble : Light out
Alarm Relay : Form A, DC24V 1A.
Trouble Relay:Form B, DC24V 1A.
0 to +50 degree C-20 to +70 degree C
30 to 85 %RH (no condensation)
136×136×100
aluminum alloy (ADC12)
BlackApprox 3kg
For complete approval details, refer to theAppendix A.

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STRUCTURE

Figure 1 : FLS-02EC(-H2) Structure

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5.

OPERATION

5.1.

Status LED

Status LED indicates the state of equipment. Table 1 indicates the condition of the LED for eachstatus. Alarm condition takes priority over trouble condition.
Table 1 - Status LED Operation
Status of detector
LED Indicator
NormalBlinks once in 10 seconds- Blinks once in 2 seconds
Alarm- this indication latching until power-cycle asystem.
- Light out
Trouble- this indication non-latching.
5.2.

Relay

FLS-02EC(-H2) has alarm and trouble relays. All relays are rated to DC24V / 1A. Table 2 indicatesthe operation of each relays.
Table 2 - Relays Operation
Relay
Name5.3.

Condition
PowerOFF

NormalAlarm

TroubleAlarmOpen

Open

Close

Open

Trouble

Open

Close

Close

Open

Note
this relay latching until
power-cycle a system.
this relay non-latching.

Automatic Test Function

Every hour, detector supervises changes of smoke signal due to aging and dirt of sensor. Whenchanges of smoke signal reaches to the limit, it will result in Trouble condition.
And, detector supervises the light emission state of detection area every 24 hours (and after 60
seconds since turning on the power). When detection area is light out, it will result in Trouble
condition.
6.

INSTALLATION！ WARNING
・FLS-02EC(-H2) must be properly installed and used according to this manual and thespecific approval certificates. Improper installation and use will invalidate warranty andproduct certifications.
・Do not disassemble or repair the detector without permission. Detector repair should beperformed only by the manufacturer.

・Be certain that installation complies with all local codes. If you have questions, consult
the authority having jurisdiction before installation the system.
・Please install the detector after turning off the power.
・The FLS-02EC and FLS-02EC-H2 include flameproof joints, consult Fenwal Control ofJapan if repair of the flameproof joints is necessary.

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6.1.

Installation Environments

1.

Temperature: 0 to +50 degree C

2.

Humidity: 30 to 85%RH（However, no condensation）

3.

Caution :・Installed Indoors
・Avoid drops of water, moisture, corrosive gases, and vapors of organic solvents.
・Avoid direct sunlight and radiation by high temperature.
・The Dust Cover (see Figure 2) keeps dust and particles out of the smoke chamber that mayenter. Don't remove it until installation is over.

Figure 2 : Dust Cover
6.2.

Mounting1 ) Fix the FLS-02EC(-H2) to the wall with four M5 or M6 bolts using base 4-φ7 hole (See Figure 3) .
bolt length more than 11 (eleven) mm. It must be mounted on a ceiling or wall of sufficientstrength to support the weight.
2 ) It is normally mounted on the ceiling no less than 0.6 m ( twenty-four inch ) from a side wall, andvice versa (See Figure 3).

Figure 3 : Mounting[NOTE] FLS-02EC(-H2) separates the base and cover and packs itES1666

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6.3.

Wiring！ WARNING
Be certain that wiring complies with all local codes. If you have questions, consult
the authority having jurisdiction before wiring the system.

6.3.1.

Specification
Table 3 shows the pin assignments of the terminal blocks



CN4 and CN5 (See Figure 4 for exterior view).
Table3 - Pin assignments of Terminal Board
Pin NoFigure 4 - Terminal Board external view
Function

1+24V

20V

3

Alarm contact-Normal Open4Alarm contact-Common5Trouble contact-Normal Close

6

Trouble contact-Common

The diameter of usable wiring is as follows.
Wiring Diameter : (Minimum) 0.2mm2(Maximum) 2.5mm2

Case of AWG(Maximum) 12: (Minimum) 24

The screws must be tightened down with a torque 0.5 to 0.6 N•m.



The environmental specification of the cable should be sufficient to withstand the surrounding
environment.

6.3.2.

Procedure1 ) Install the base according to "6.2 Mounting", and complete the installation of the system conduit.
Insert the external cable within the base and close the unused NPT1/2 or M20 entry with theplug (See Figure 5). Conductor insulation of external wiring should be stripped off with a bareconductor length of about 0.3 inch (7 mm)

Figure 5 - Install BaseES1666

8／132 ) Connect the external wiring to the appropriate terminals according to "6.3.1 Specification". Refer
to Figure 6 for the earth terminal location and Figure 10 for the wiring diagram.

Figure 6 - Earth terminal
3 ) Hang the cover with a cable tie on the base, and main board connector connect to CN3 of terminalboard (See Figure 7).

Figure 7 - Connection between main board and terminal board4 ) Attach the cover to the base and align the binding band insertion slot (See Figure 8).

Figure 8 - Attaching the cover

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9／135 ) Fix the 4 places with the attached M6 screw. And, close the unused NPT1/2 or M20 entry withthe plug.

Figure 9 - Fix the cover！ WARNING
・Please use the plug attached to the detector or one that has been certification to withstandexplosion-proof (Ex d). An example of explosion-proof plug is shown below.
NPT1/2 : CMP-757-D-T1-5 (R.STALL, INC.)
M20×P1.5 : CMP-757-D-M2-5 (R.STALL, INC.)
・Consult with Fenwal Controls of Japan, Ltd. for genuine replacement cover fasteners:
M6X20 hexagon bolts of A2-70 strength class SUS304 stainless steel or better are
acceptable alternatives.

Figure 10 - Wiring Diagram

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7.

MAINTENANCE AND INSPECTION

In order to check that the system is functioning correctly, it is recommended to perform maintenanceand inspection according to environment (Standard once a year).
FLS-02EC(-H2) can be tested using the same methods employed for any photo-electric detector. For
example, test smoke can be used.
If the detector are in fails condition (do not responding to the operation test, the status indicatordoes not light up, etc), please turn off. Then contact us. The detector is not designed to be repaired in
the field.
[Note]
If signal transfer output of an error or alarm to external devices is likely to occur during maintenance,
ensure to inform the Customer’s department in-charge in advance, and then conduct the inspection.
Moreover, when buzzer is going to ring, notify the people in surrounding area beforehand.
Since in many cases it is necessary to move furniture and equipments of customer during
maintenance, discuss closely with the customer in advance and ensure that operators are not injured
and other equipments are not damaged.

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8.

ORDERING INFORMATION

When ordering, please specify. Refer to FLS-02EC(-H2) Model Matrix for details.
FLS-02EC(-H2) Model Matrix
MODELFLS-02EC

DESCRIPTION
Explosion Proof Smoke Detector-H2

Support to hydrogen gas-(None)

No support to hydrogen gas-M-N

9.

Metric thread (M20)
NPT thread (NPT1/2)
1
Plug:1
2
Plug:2
3
Plug:3NOTE

See Appendix for details.

Quantity of attached plug

CONTACT US

Please contact our authorized distributors, or the head office or sales offices of the Fenwal Controlsof Japan, Ltd. in inquiring about the product.
Fenwal Controls of Japan, Ltd.
2nd floor, Kyouhan Kudan Bldg., 1-5-10, Iidabashi, Chiyoda-ku, Tokyo, Japan, 102-0072
Tokyo Head Office :(+81)-3-3237-3565

Web Inquiry : http://www.fenwal.co.jp/en/form/ES1666

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APPENDIX A
FM Certification
FM18US0151X
FLS-02ECClass I, Division 1, Group C,D T6
Class I, Zone 1, AEx db IIB T6 Gb

FLS-02EC-H2

Class I, Division 1, Group B,C,D T6
Class I, Zone 1, AEx db IIB+H2 T6 Gb

Approval Standards
ANSI / ISA 60079-0:2013

Explosive atmospheres - Part 0: Equipment - General Requirements

ANSI / UL 60079-1:2015

Explosive atmospheres - Part 1: Equipment protection by flameproof
enclosures “d”

FM 3600(2018)

Electrical Equipment for Use in Hazardous (Classified) Locations General Requirements

FM 3615(2018)

Explosionproof Electrical Equipment General Requirements

FM 3230(2019)

Smoke Actuated Detectors For Automatic Fire Alarm Signaling

IECEx Certification
IECEx FMG 16.0040X
FLS-02EC

Ex db IIB T6 Gb

FLS-02EC-H2

Ex db IIB+H2 T6 Gb

Approval Standards
IEC 60079-0:2011 (Ed.6)

Explosive atmospheres - Part 0: Equipment - General Requirements

IEC 60079-1:2014 (Ed.7)

Explosive atmospheres - Part 1: Equipment protection by flameproof
enclosures “d”

ATEX Certification
FM16ATEX0107X
FLS-02EC

II 2 G Ex db IIB T6 Gb

FLS-02EC-H2

II 2 G Ex db IIB+H2 T6 Gb

Approval Standards
EN 60079-0:2012+A11:2013
EN 60079-1:2014Explosive atmospheres - Part 0: Equipment - General Requirements

Explosive atmospheres - Part 1: Equipment protection by flameproof
enclosures “d”

Special Conditions For Safe Use X:
1.

The FLS-02EC and FLS-02EC-H2 include flameproof joints, consult Fenwal Controls of Japan,
Ltd. if repair of the flameproof joints is necessary.

2.

Consult with Fenwal Controls of Japan, Ltd. for genuine replacement cover fasteners: M6X20
hexagon bolts of A2-70 strength class SUS304 stainless steel or better are acceptable
alternatives.

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APPENDIX B

FLS-02EC Nameplate

FLS-02EC-H2 Nameplate
NOTE
1.

Mfg.No. is unique number of product.

2.

ENTRY is thread size (M20×P1.5 or NPT1/2).

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