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Vemer SRG.4 User manual

  • Hello! I've reviewed the user manual for the Vemer SRG.4 gas detection system, including the SRG.4 control unit, CH4, LPG and CO sensors. The document covers installation, operation, and maintenance, along with key features such as alarm relays, LED indicators, and different sensor types. I'm ready to answer any questions you have about the device or its functionality, for example about how to set up operation logic or what to do in case of alarm or failure.
  • What gases can the system detect?
    What kind of power supply is needed for the control unit?
    How often should the system's operation be checked?
    What is the average lifespan of the probes?
    What should I do if the probe has been disconnected?
ON
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
+ –
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20
8A / 250V 8A / 250V
1
2
V
a
c
/
d
c
FaultAlarm
Power supply
Description
g 
h
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
 Ledpowersupply
Led signaling general failure
 Reset/Testbutton
Led signaling failure probes
Led signaling gas alarm
 Powersupplyterminals
g
Connection probes terminals
h
 Protectionfuse1A
 Set-upjumper
j
 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.
A
Position A
Positive logic
Position B
Negative logic
B
A
B
E1
E1
E1
A
B
 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:
A
Position A
Alarm relay
Permanent control
Position B
Alarm relay
Impulsive control
B
A
B
E2
E2
E2
A
B
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
/