Vemer SRG.4 User manual

Brand: Vemer

Model: SRG.4

Type: User manual

Vemer SRG.4 is a control unit that can be used to create gas detection systems in areas such as boiler rooms, workshops, warehouses, laboratories, etc. It can work with probes such as CO Sensor, CH4 Sensor and LPG Sensor to detect the presence of carbon monoxide, methane, and LPG. The control unit has an alarm relay that can be used to control a solenoid valve or an auxiliary device, and it also has LED indicators to display the alarm or failure status. The SRG.4 is designed to be installed in an electrical panel and can be used to protect against the risks of gas leaks.

SRG.4

1 2 3 4

TEST

RESET

Mod. SRG.4

V3IS00460–010

86.7

159.5

50.5

12.0

58.0

86.7

50.5 50.5

C1 S1 A1 C2 S2 A2 C3 S3 A3 C4 S4 A4

1 2 34

SENSORS

+ –

2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20

8A / 250V 8A / 250V

FaultAlarm

Power supply

Description

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

g 







j 

User manual

SRG.4 - CONTROL UNIT FOR GAS DETECTOR

Read all the instructions carefully

 TheSRG.44isacontrolunitforthecreationofgasdetectionsystemsinareas

suchasboilerrooms,workshops,warehouses,laboratories,etc.Itisdesignedto

workwithprobessuchasCOSensor,CH4SensorandLPGSensor.Itoffersthe

possibilitytocontrolasolenoidvalveoranauxiliarydevice(siren,flasher,etc.)

usinganalarmrelaycontainedinside.ThealarmorfailureisdisplayedbyLED.

SAFETY WARNINGS

To ensure correct installation, you must comply with the following

indications:

1) The device must be installed by a competent person

2) The device must be installed in a panel where, after installation, the terminals

can no longer be accessed

3) In the electrical system up the line from the energy meter there must be a

device to protect against overloads

4) Connect the instrument following the diagrams shown in this sheet and in the

product marking

5) Before accessing the terminals, make sure the leads to connect to the

instrument are not electrically live

6) Do not power and connect the instrument if any part of it is damaged or

missing.

Codice Model Description

VE203600 SRG.4 Gasdetectorwith4connectingsensor

VE205100 CH4 SENSOR Methanedetectionsensor

VE206900 LPG SENSOR LPG sensor

VE207700 CO SENSOR Carbonmonoxidesensor

TECHNICAL CHARACTERISTICS

Control unit SRG.4

• Powersupply:

 −Voltage:12Vac/dc±10%

 −Powerconsumptionwith1probe:~160mA

 −Powerconsumptionwith4probes:~280mA

 −Connection:terminalsof2.5mm2

 −Protection:fuse1A5x20mm

• Inputs:

 −4inputsforCH4Sensor(methane),LPGSensor(LPG),COSensor(CO).

 −Connectionofprobes:terminalsof2.5mm2 per probe

 −Max.connectionlength:50mforeachprobe

 −Cross-sectionoftheleads:1.5mm2

• Output:

 −Alarm:relaywithexchangecontact8A/250VAC

 −Failure:relaywithexchangecontact8A/250VAC

 −Connection:terminalsof2.5mm2forrelayC-NC-NO

• Luminoussignals: 1greenLED:powersupplied

 1yellowLED:generalfailure

  4yellowLED’s:failureforeachprobeline

  4redLED’s:gasalarmforeachprobeline

• Reset/testbuttonforalarmresetandprobetestfunctions

• Degreeofprotection:IP20;IP40whencorrectlyinstalledinanelectricalpanel

• Ambienttemperature:0÷+50°C

• Humidity:≤90%R.H.withoutcondensation

• Productforassemblyon9-moduleDINrails

Sensors for SRG.4 control units

• Powersupply:fromthecontrolunitSRG.4

 −Currentinput(at6.5V):40mA

 −Connections:terminalsof2.5mm2forprobeC(common),S(signal),A(power6.5Vdc)

• Modelsandcalibration:

 −Methanegas:CH4Sensor,(default)10%LIEofmethane

 −LPG:LPGSensor,(default)12%LIEofisobutene

 −Carbonmonoxide:COSensor,(default)200ppmofCO

• Container:inself-extinguishingplasticmaterial

• Fastenedtowallusingscrewsandplasticplugs

• Protection:IP30

• Ambienttemperature:0÷+50°C

• Humidity:≤90%R.H.withoutcondensation

INSTRUMENT DESCRIPTION

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 Ledpowersupply



Led signaling general failure



 Reset/Testbutton



Led signaling failure probes



Led signaling gas alarm



 Powersupplyterminals

Connection probes terminals

 Protectionfuse1A



 Set-upjumper

 Terminalsforalarmoutputrelay



 Terminalsforfailureoutputrelay

INSTALLATION

Do not use the device in excess of the limits set forth in the technical data. The installer is

responsible for correct, safe installation of the product. Use care during shipping, storage

and handling.

1) Protectionofthedevice.

 Toensuretheproperdegreeofprotectionoftheunit,itisnecessarytoinstallthecontrol

unitinanelectricalpanelconstructedinaccordancewithcurrentstandardsforthe

workplace,andinsideofwhichthepowersupplysystemcanalsobehoused.Thecontrol

unitcanbeinstalledatthebottomofthepanelorinDINmodularpanels.

 TheLPG,COandCH4Sensorsaredesignedtobewall-mounted(vertically),usingscrews

andplasticplugs.Toproceedwithinstallation,openthecontainerbyunscrewingthe

screwlocatedontheside.Makesurenottodamagethesensorandnottotouchthe

calibration devices.

2) Installationoftheproduct.

 Thecorrectinstallationoftheprobeisessentialtoproperoperationofthesystem.

Therefore,itmustbeinstalled:

 –Inareaswithcirculationofnaturalair;

 –Inareasthatarenotsubjecttodustordirtthatmayrenderthesensorinoperative;

 –Nearjetsofwater,intakegrilles,openings,etc.

 –Atanadequatedistancefromusersofgassoastopreventthesystemfromintervening

improperlyduetofunctionalleakage.

 Also,positioningdependsonthetypeofgastobedetected,specifically:

 –CH4:Methanegas-attop,about20-30cmfromtheceiling

 –LPG:LPG-atbottom,about20-30cmfromthefloor

 –CO:carbonmonoxide–about1.5mfromthefloor

 Fornewsystems,theprobemustbeinstalledaslateaspossible,sothattypical

constructionsiteactivitiesdonotdamagethedetector.

Attention: make sure you check operation at least once a year, and in any case

whenever there is an extended period of disuse or in the event of replacement.

Any tampering may compromise correct operation of the system.

3) Connectionsanduseoftheproduct.

 Normalelectricalcablescanbeusedforconnections.Inanycase,wheninstallationis

inplacesthatarestronglyexposedtoelectromagneticdisturbances,itisadvisableto

useshieldedcables.Thedetectionsystemmustalwaysbeinoperation.Therefore,the

electricalpowersupplyofthedetectormustnotincludeswitchesorotherdevicesthat

mayaccidentallyshutitoff.Thepowersupplyofthecontrolunitmustcomplywiththe

requiredvaluesandthecurrentinputofanydeviceconnecttotheterminalsoftherelay

mustbelessthanorequaltothemaximumcapacityofthecontacts.Theaveragelifespan

oftheprobesis5yearsfromthedateofinstallation.Therefore,attheendofthattime

theywillneedtobereplaced.

Attention: in the case in which in every single terminal block of the control

unit missed the probes, there must be a resistence of 18KOhm 1/4 W 5%

between C ans S furnisced in the box.

OPERATION

 Oncethedevicehasbeeninstalled,youwillneedtoselecttheoperatinglogicusing

jumperE1.Itcanbeeitherpositiveornegative.Thecontrolunitsignalsitsoperating

statusbymeansofLED’s.

Position A

Positive logic

Position B

Negative logic

 DependingonthelogicselectedusingjumperE1,inanormalsituation(noalarms),the

LED’sandtherelaywillbe:

 –positivelogic:LEDon,relayenergized

 –negativelogic:LEDoff,relayde-energized

 Ifnegativeoperatinglogicisselected,thealarmrelaymaybecontrolledinpermanentor

impulsivemode,dependingonthepositionofjumperE2:

Position A

Alarm relay

Permanent control

Position B

Alarm relay

Impulsive control

Dimensions

Connection diagram

 Oncepoweredon,thecontrolunitperformsthefollowingphasesinsequence:

• Buzzertest(durationabout5seconds)whichcausessequentiallightingoftheLED’sand

abriefringingofthebuzzer.

• Pre-heatingoftheprobe(whichlastsabout1minute),duringwhichthedetection

systemisnotoperationalbecausethisallowstheprobestoreachthecorrectoperating

temperature.

• Operationaltest(whichlastsabout3minutes)duringwhichthepowersupplyLED

flasheswithafrequencyof2Hzandalltimesettingsareresettozerotomakeiteasierto

checktheprobes.PresstheReset/Testforaboutonesecondtointerrupttheoperational

testphaseandchecktheprobes.

• Gasalarmtest,whichoccursbyplacingthetestspraycanneartheprobeandreleasing

asmallamountofgas.Donotdirectthespraydirectlyontothesensoroftheprobe,

asitmaydamageitirreparably.Thecontrolunitwillsignalthealarminthefollowing

manner:

Interface Positive logic Negative logic

Led (red) for alarm

of concerned probe

Off On

Alarmbuzzer Continuous sound Continuous sound

Alarmrelay De-energized Energized(permanentlyor

in impulsive mode)

 PresstheReset/Testkeyforonesecondtosilencethealarm(ifthegasisnolonger

present)andendthetestphase.Torestartthetestphase,pressthecorrespondingbutton

for about 6 seconds.

• Probeanomalytest,whichistobesimulatedsimplybydisconnectingtheconcerned

probecableandcheckingthefollowingsignals:

Interface Positive logic Negative logic

Led (yellow) for failure

of concerned probe

Off On

Alarmbuzzer Intermittent sound Intermittent sound

Failurerelay De-energized Energized

 Oncethetesthasbeenmade,re-connecttheprobeandpresstheReset/Testbuttonto

restorethecontrolunittonormaloperation.

Normal operation

 Duringnormaloperationofthecontrolunit,boththemonitoringforgasalarmand

theself-diagnosisforplantanomalies(probes)andsystemsanomalies(controlunit)are

active.Inthisphaseandwithnoalarmsorfailures,thecontrolunitstatusisasfollows:

Interface Positive logic Negative logic

Led (green)forpowersupply On On

Led (yellow) for general failure On Off

Led (yellow) for probe failure (4) On Off

Led (red) for general alarm and

line failure (4)

On Off

Alarmbuzzer No sound No sound

Alarmrelay Energized De-energized

Failurerelay Energized De-energized

 Inpresenceofgasalarmorprobefailure,thecentralunitgoesintothesameconditions

describedintherelativestestphase.

REFERENCE STANDARDS

ConformitytotheEUdirectives

2006/95/EC(LowVoltage)

89/336/ECmodifiedby92/31/ECCand93/68/EEC(E.M.C.)

isdeclaredwithreferencetothefollowingharmonisedstandard:

EN 61779-1, EN 50270

Vemer SRG.4 User manual

Vemer SRG.4 User manual

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