《压力开关说明书》word版.docx
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《压力开关说明书》word版
DG型气体压力开关
使用说明书
●请阅读和保持一个安全的地方
解释符号
●,1,2,3...=功能
➔=用法说明
所有工作必须在阅读操作说明后才能进行！
警告！
不正确的安装、调整、修改、操作或维护可能导致伤害或物质损失。
使用前先阅读说明书。
这个单位必须安装依照本条例的实施。
标准声明
We,themanufacturer,herebydeclarethattheproductsDG..,markedwithproductIDNo.CE0085AP0467,complywiththeessentialrequirementsofthefollowingDirectives:
–90/396/EECinconjunctionwithEN1854,
–73/23/EECinconjunctionwiththerelevantstandards.
Therelevantproductscorrespondtothetypetestedbythenotifiedbody0085.
ComprehensivequalityassuranceisguaranteedbyacertifiedQualitySystempursuanttoDINENISO9001accordingtoannexII,para-graph3ofDirective90/396/EEC.ElsterKromschröderGmbH,Osnabrück
测试
➔电源电压、环境温度和外壳——看类型的标签。
➔最大介质温度:
-15+80°C。
在系统暴露于更高的热应力、热设备上时压力开关必须安装在上游。
DG..B型
➔正压时1号位置为进气
DG..U型,DG..H型,DG..N型
➔正压时1号或者2号位置为进气，气体为空气、天然气或者烟气（其他位置密封），通风时气体从3号或者4号位置离开。
➔负压时3号或者4号位置为进气，气体为空气、天然气或者烟气（其他位置密封），通风时气体从1号或者2号位置离开。
➔对于压差时，用1号或2号和3号或4号，气体为空气、天然气或者烟气，其他位置密封。
➔在连接3号和4号位置时使用过滤垫，防止气体中的杂质弄脏电触点。
➔DG..B,DG..Uswitchwithrisingpressure.
➔DG..Hswitchesandlocksoffwithrisingpressure–withmanualreset.
➔DG..Nswitchesandlocksoffwithfallingpressure–withmanualreset.
➔Fitanupstreamrestrictorifthesystemissubjecttogreatlyfluctuatingpressures（seeacces-
sories）.
➔Theservicelifewillbeshorterifsubjecttoozoneconcentrationsexceeding200µg/m3.
Installation
➔Fittingpositionasrequired,pref-erablywithdiaphragmvertical,withunobstructedviewoftheadjustmentdial.Ensurethatnodirtormoisturecanpenetrateopenventilationports.
➔Thehousingmaynotcontactmasonry.Minimumclearance20mm.
➔AvoidsubjectingtheDGtostrongorviolentvibrations.
➔Condensationmustnotbeallowedtogetintothehousing.Atsubzerotemperaturesmalfunctions/failuresduetoicingcanoccur.
➔Whenusingsiliconetubes,onlyusesiliconetubeswhichhavebeensufficientlycured.
➔Continuousoperationathightemperaturesacceleratestheageingofelastomermaterials.
➔Protectfromdirectsunlight（evenwithIP65）.
DG..B..S
➔DonotconnectgasbutonlyO2orNH3tothepositivepressureport1.Ensurethatnogreaseisusedduringinstallation.
DG
1Flushthepipework.
2Usesuitablesealingmaterial.
3Ifdirtcanaccumulateatport
3or4,usethefilter,OrderNo.74916199.
4FittheDG.
Tightnesstest
Adjustingtheswitchingpressureps
调整范围（调整区间=±15%调整范围最大值）
微分切换在最大值和最小值之间设置
切换压力和可能被重置之间的区别
在测试过程中设定的偏差,根据EN1854气体压力开关
在测试过程中设定的偏差,根据EN1854空气压力开关
DG6B,DG6U
0,4–6mbar
0,2–0,3mbar
±15%
±15%oder/or/ou/of/oppure/ó±0,1mbar
DG10B,DG10U
1–10mbar
0,25–0,4mbar
±15%
±15%
DG30B,DG30U
2,5–30mbar
0,35–0,9mbar
±15%
±15%
DG50B,DG50U
2,5–50mbar
0,8–1,5mbar
±15%
±15%
DG150B,DG150U
30–150mbar
3–5mbar
±15%
±15%
DG500B,DG500U
100–500mbar
8–17mbar
±15%
±15%
DG10H,DG10N
1–10mbar
0,4–1mbar
±15%
±15%
DG50H,DG50N
2,5–50mbar
1–2mbar
±15%
±15%
DG150H,DG150N
30–150mbar
2–5mbar
±15%
±15%
DG500H,DG500N
100–500mbar
4–17mbar
±15%
±15%
1Disconnectthesystemfromtheelectricalpowersupply.
Wiring
DG
➔24–250VAC:
I=0.05–5A,cosϕ=1,
I=0.05–1A,cosϕ=0.6;
DG..G
➔12–250VAC:
I=0.01–5A,cosϕ=1,
I=0.01–1A,cosϕ=0.6;
12–48VDC:
I=0.1–1A.
➔IftheDG..Ghasswitchedavoltage>24Vandacurrent>0.1Aonce,thegoldplatingonthecontactswillhavebeenburntthrough.Itcanthenonlybeoperatedatthispowerratingorhigherpowerrating.
➔Contacts3and2closewhensubjecttoincreasingpressure.Contacts1and3closewhensubjecttofallingpressure.
1Disconnectthesystemfromtheelectricalpowersupply.
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
Functioncheck
➔Werecommendafunctioncheckonceayear.
Accessories
Fasteningset
Connectingset
➔Formonitoringtheminimum/maximuminletpressurepe.
Externaladjustment
PIAtestkey
Restrictororifice
Tubeset
➔foraironly
Standardcouplerplug
Pilotlampredorgreen
for110/120VACor220/250VAC
LEDred/greenfor24VDC/AC
Gaspressureswitch
DG..T,DG..HT,DG..NTfornaturalgas,cleancokeovengas,LPG,biologicallyproducedmethaneandair
Operatinginstructions
Installing
wiring
adjusting
byauthorizedtrainedpersonnelonly!
WARNING!
Improperinstallation,adjustment,modification,operationormaintenancecouldleadtoinjuryordamage.Alladjustmentsmustbemadebyaqualifiedtechnician.WiringmustcomplywithlocalcodesandtheNationalElectricalCodes.Topreventthepossibilityofpropertydamageturnoffelectricalpower,depressurizeinstallation,ventfluidtoasafeareabeforeservicing.
DG..T,DG..HT,DG..NTfor
➔excesspressure,connection1or4,
➔negativepressure,connection2,
➔differentialpressure,connection1or4and2
pmaxtoatmosphereormax.differentialpressurebetweenupperandlowerchamber:
8.5psi（600mbar）Ambientandgastemperature:
-40to+140°F（-40to+60°C）（DG..S:
+5to+140°F（-15to+60°C））Atanambienttemperatureresp.gastemperaturebelow-22°F（-30°C）theadjustedswitchpointmaychangeperceptibly.
➔Theservicelifewillbeshorterifsubjecttoozoneconcentrationsexceeding200µg/m3.Accessoriesseebackpage.
Installingpressureswitchintothepipework
➔Mountingpositionarbitrary,butpreferablywithhorizontalorverticaldiaphragm–withclearviewtograduatedring–pleasemakesurethatdirtorhumiditydoesnotgetintotheconnectionsopenforaeration–
➔thehousingmustnottouchitssurroundingwalls–minimumdistance1"（25mm）–
➔avoidsubjectingthegaspressureswitchtostrongorviolentvibrations.
➔Whenusingsiliconetubes,onlyusesiliconetubeswhichhavebeensufficientlyafterbaked.
➔Protectgaspressureswitchfromdirectsunlight.
➔Ifdirtcanaccumulateatconnection4,usethefilter,OrderNo.74916199.
●Usesuitablejointingcompound.
Excesspressuretest
Typeofgas:
gas,air,fumes
●Connectexcesspressuretoconnection1or4,1/4NPT–
➔max.+8.5psig（+600mbar）–
➔connection2muststayopen.NegativepressuretestTypeofgas:
air,fumes
●Connectnegativepressuretoconnection2,1/8NPT,flatgasket–
➔max.-8.5psig（-600mbar）–
➔connection1or4muststayopen–
➔connection2joinstheupperchamberwiththemicroswitch,therefore,donotconnecttogascarryingpipes!
DifferentialpressuretestTypeofgas:
air,fumes
●Connectthehigherpressureto1or4,1/4NPT–
●connectthelowerpressureto2,1/8NPT–
➔connection2joinstheupperchamberwiththemicroswitch,therefore,donotconnectgascarryingpipes!
Checkforsoundnesswhentestingthesystemasawhole–
●testpressure:
1.5timestheoperatingpressure–max.29psig（2bar）foraperiodoflessthan15minutes,
●usedetergentatpipeconnections.
Wiringofpressureswitch
WARNING!
Ensurethatthereisnovoltageinthesupplylinewhenyoumaketerminalconnections.
●Unscrewcover.
●Removecoverplate.
●Passwiresthrough1/2NPTconduitandconnect–terminals2xAWG18（2x1.5mm2）.
➔Ensuregoodgroundconnectionviaterminal.
➔Microswitch:
NO2–COM3closesonpressureincreaseNC1–COM3opensonpressureincrease
ElectricalData
Switchingcapacity:
forvoltages30–240VACusepressureswitchwithsilver-platedplatedcontacts（standardversion）;
I=5Aresistive,I=0.5Awithcosϕ=0.6.
Contactrating:
6A,Forsmallvoltages<30VACorDCusespecialversionwithgold-platedcontacts–DG..TG–
I=0.1resistive,I=0.05Awithcosϕ=0.6.
Short-circuitproof:
quick-actionfuseupto8Aacc.toUL198G
Typeofenclosure:
NEMA3（IP54）1/2NPTconduitconnectionConnection:
screwterminals2xAWG18（2x1.5mm2）
Adjustingpressureswitchtotherequiredswitchingpressure
Thesetswitchingpressureisobtained:
withambienttemperature32°Fto140°F（0°Cto60°C）withincreasingpressure
➔withverticaldiaphragm:
accurately,
➔withhorizontaldiaphragm:
theswitchingpressureisapprox.0.08"W.C.（0.2mbar）higherthanthereading
➔withsuspendeddiaphragm:
theswitchingpressureisapprox.0.08"W.C.（0.2mbar）lessthanthereading.Thereadingsareapproximations.Adjustment–exampleDG50T3=pressuretestpointThesettingof6"W.C.（15mbar）appliesfor
➔excesspressureof+6"W.C（+15mbar）,
➔negativepressureof-6"W.C.（-15mbar）or
➔differentialpressureof6"W.C.（15mbar）（+10"W.C.（+25mbar）atconnection1or4,+4"W.C.（+10mbar）atconnection2）Settingofswitchingpressure:
●turnrequiredvalueonthescalediskoverthepointer.
Checkingofsetswitchingpressure
●Measureexactswitchingpoint:
usingamanometerattestpoint3forexcesspressureandbymeteringthevoltageatNC1orNO2
●ifnecessary,re-adjustscalediskthereadingsareapproximations!
●Putcoverplateonandpressfirmly,putcoverbackonandscrewtight–firstthetwoscrewsbesidethescaledisk.GaspressureswitchesDG..Trequirelittleservicing.
➔Conductafunctioncheckonceayear,oreverysixmonthsforbiologicallyproducedmethane.
AccessoriesforDG..T
Coverwithexternaladjustment
Fitnipplewithexternalhexagonintohexagonsocketonthegraduateddisk.Screwoncoverwithsealandgland.
Controllampgreen
220VAC/240VAC
110VAC/120VAC（standard）
48VACorDC
24VDCLED
➔ConnectiontoNO2:
lamplightsupwithpressure
➔ConnectiontoNC1:
lamplightsupwithoutpressure
➔with24VDCLEDnot
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