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Vemer SRG User manual

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ON
SRG
TEST
RESET
Mod. SRG
V3IS00461–010
86.7
106.0
50.5
58.0
86.7
50.5
12.0
C S A
+–
125 6 7 8
15 16 17 8 9 10
3 4 556 7
300mA max
12V
8A / 250V
1
2
V
a
c
/
d
c
Fault Alarm
g
h
 j
P
o
w
e
r
s
u
p
p
l
y
Power supply
User manual
SRG - CENTRAL UNIT FOR GAS DETECTOR
Read all the instructions carefully
 TheSRG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.
Code Model Description
VE204400 SRG Gasdetectorwith1connectingsensor
VE205100 CH4 SENSOR Methanedetectionsensor
VE206900 LPG SENSOR LPG sensor
VE207700 CO SENSOR Carbonmonoxidesensor
TECHNICAL CHARACTERISTICS
SRG control unit
• Powersupply:
 −Voltage:12Vac/dc±10%
 −Powerconsumption:~160mA
 −Connection:terminalsof2.5mm2
 −Protection:fuse1A5x20mm
• Input:
 −1inputforCH4Sensor(methane),LPGSensor(LPG)orCOSensor(CO)
 −Sensorconnection:terminalsof2.5mm2C(common),S(signal),A(powersupply)
 −Max.lengthofconnection:50m
 −Cross-sectionoftheleads:1.5mm2
• Output:
 −Alarm:relaywithexchangecontact8A/250VAC
 −Failure:opencollector12Vdc/300mAmax
 −Outputconnection:terminalsof2.5mm2
• Luminoussignals: greenLED:powersupplied
  yellowLED:failure
  redLED:gasalarm
• Reset/testbuttonforalarmresetandprobetestfunctions
• Degreeofprotection:IP20;IP40whencorrectlyinstalledinanelectricalpanel
• Degreeofpollution:II
• Ambienttemperature:0÷+50°C
• Humidity:≤90%R.H.withoutcondensation
• Productforassemblyon6-moduleDINrails
Sensors for SRG control units
• Powersupply:fromthecontrolunitSRG
 −Currentinput(at6.5V):40mA
 −Connection:terminalsof2.5mm2C(common),S(signal),A(powersupply)
• 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carbonmonoxide
• 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 failure
Led signaling gas alarm
 Reset/Testbutton
 Powersupplyterminals
Terminals for open collector failure
g
 Terminalsforalarmoutputrelay
h
Terminals for gas sensor connection
 Set-upjumper
j
 Protectionfuse1A
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 Sensor: Methane gas - at top, about 20-30 cm from the ceiling
– LPG Sensor: LPG - at bottom, about 20-30 cm from the floor
– CO Sensor: 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.
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: 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.
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
 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probetoreachthecorrectoperating
temperature.
Dimensions
Connection diagram
Description
• 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probe.PresstheReset/Testforaboutonesecondtointerrupttheoperational
testphaseandchecktheprobe.
• 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 probe alarm 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failuretest,whichistobesimulatedsimplybydisconnectingtheprobecableand
checkingthefollowingsignals:
Interface Positive logic Negative logic
Led (yellow) for probe failure Off On
Alarmbuzzer Intermittent sound Intermittent sound
Faulureoutput Off On
 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(probe)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 failure On Off
Led (red) for gas alarm On Off
Alarmbuzzer Nosound Nosound
Alarmrelay Energized De-energized
Faulureoutput On Off
 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
/