压力开关说明书共14页文档

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, the manufacturer, hereby declare that the products DG.., marked with product ID No. CE 0085AP0467, comply with the essential requirements of the following Directives:– 90/396/EEC in conjunction with EN 1854,– 73/23/EEC in conjunction with the relevant standards.The relevant products correspond to the type tested by the notified body 0085.Comprehensive quality assurance is guaranteed by a certified Quality System pursuant to DIN EN ISO 9001 according to annex II, para-graph 3 of Directive 90/396/EEC.Elster Kromschröder GmbH, 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..U switch with rising pressure.➔ DG..H switches and locks off with rising pressure –with manual reset.➔ DG..N switches and locks off with falling pressure –with manual reset.➔ Fit an upstream restrictor if the system is subject to greatly fl uctuating pressures (see acces-sories).➔The service life will be shorter if subject to ozone concentrations exceeding 200 µg/m3.Installation➔Fitting position as required, pref-erably with diaphragm vertical, with unobstructed view of the adjustment dial. Ensure that no dirt or moisture can penetrate open ventilation ports.➔ The housing may not contact masonry. Minimum clearance 20 mm.➔ Avoid subjecting the DG to strong or violent vibrations.➔ Condensation must not be allowed to get into the housing. At subzero temperatures malfunctions/failures due to icing can occur.➔ When using silicone tubes, only use silicone tubes which have been suffi ciently cured.➔ Continuous operation at high temperatures accelerates the ageing of elastomer materials.➔ Protect from direct sunlight (even with IP 65).DG..B..S➔ Do not connect gas but only O2 or NH3 to the positive pressure port 1.Ensure that no grease is used during installation.DG1 Flush the pipework.2 Use suitable sealing material.3 If dirt can accumulate at port3 or 4, use the fi lter, Order No. 74916199.4 Fit the DG.Tightness testAdjusting the switching pressure ps1Disconnect the system from the electrical power supply.WiringDG➔ 24–250 V AC:I = 0.05–5 A, cos ϕ = 1,I = 0.05–1 A, cos ϕ = 0.6;DG..G➔ 12–250 V AC:I = 0.01–5 A, cos ϕ = 1,I = 0.01–1 A, cos ϕ = 0.6;12–48 V DC:I = 0.1–1 A.➔ If the DG..G has switched a voltage > 24 V and a current > 0.1 A once, the gold plating on the contacts will have been burnt through. It can then only be operated at this power rating or higher powerrating.➔ Contacts 3 and 2 close when subject to increasing pressure. Contacts 1 and 3 close when subject to falling pressure.1Disconnect the system from the electrical power supply.2 3 4567 8 92 3 4567 8 9Function check➔ We recommend a function check once a year. AccessoriesFastening setConnecting set➔ For monitoring the minimum/maximum inlet pressure pe.External adjustmentPIA test keyRestrictor orificeTube set➔ for air onlyStandard coupler plugPilot lamp red or greenfor 110/120 V AC or 220/250 V ACLED red/green for 24 V DC/ACGas pressure switchDG..T, DG..HT, DG..NTfor natural gas, clean cokeoven gas, LPG, biologicallyproduced methane and airOperating instructionsInstallingwiringadjustingby authorized trained personnel only!WARNING! Improper installation, adjustment, modification, operation or maintenance could lead to injury or damage. Alladjustments must be made by a qualifiedtechnician.Wiring must comply with local codes and theNational Electrical Codes. To prevent thepossibility of property damage turn off electrical power,depressurize installation, ventfluid to a safe area before servicing.DG..T, DG..HT, DG.. NT for➔excess pressure, connection 1 or 4,➔negative pressure, connection 2,➔differential pressure, connection 1 or 4 and 2pmax to atmosphere or max. differential pressure between upper and lower chamber: 8.5 psi (600 mbar)Ambient and gas temperature:-40 to +140 °F (-40 to +60 °C)(DG..S: +5 to +140 °F (-15 to +60 °C))At an ambient temperature resp. gas temperature below -22 °F (-30 °C) the adjustedswitch point may change perceptibly.➔The service life will be shorter if subject to ozone concentrations exceeding 200 µg/m3.Accessories see back page. Installing pressure switch into the pipework➔Mounting position arbitrary, but preferably with horizontal or vertical diaphragm – with clear view to graduated ring – please make sure that dirt or humidity does not get into the connections open for aeration –➔the housing must not touch its surrounding walls –minimum distance 1" (25 mm) –➔avoid subjecting the gas pressure switch to strong or violent vibrations.➔When using silicone tubes, only use silicone tubes which have been sufficiently after baked.➔Protect gas pressure switch from direct sunlight.➔If dirt can accumulate at connection 4, use the filter, Order No. 74916199.● Use suitable jointing compound.Excess pressure testType of gas: gas, air, fumes● Connect excess pressure to connection 1 or 4, 1/4 NPT –➔max. +8.5 psig (+600 mbar) –➔connection 2 must stay open.Negative pressure test Type of gas: air, fumes● Connect negative pressure to connection 2, 1/8 NPT, flat gasket –➔max. -8.5 psig (-600 mbar) –➔connection 1 or 4 must stay open –➔connection 2 joins the upper chamber with the microswitch, therefore, do not connect to gas carrying pipes! Differential pressure test Type of gas: air, fumes● Connect the higher pressure to 1 or 4, 1/4 NPT –● connect the lower pressure to 2, 1/8 NPT –➔connection 2 joins the upper chamber with the microswitch,therefore, do not connect gas carrying pipes!Check for soundness when testing the system as a whole –● test pressure: 1.5 times the operating pressure – max. 29 psig(2 bar) for a period of less than 15 minutes,● use detergent at pipe connections.Wiring of pressure switchWARNING! Ensure that there is no voltage in the supply line when you make terminal connections.● Unscrew cover.● Remove cover plate.● Pass wires through 1/2 NPT conduit and connect – terminals 2 x AWG 18 (2 x 1.5 mm2).➔Ensure good ground connection via terminal .➔Microswitch:NO 2 –COM 3 closes on pressure increase NC 1 –COM 3 opens on pressure increaseElectrical DataSwitching capacity: for voltages 30 –240 V AC use pressure switch with silver-plated plated contacts (standard version);I = 5 A resistive, I = 0.5 A with cos ϕ = 0.6.Contact rating: 6 A, For small voltages < 30 V AC or DC use special version with gold-plated contacts –DG..TG –I = 0.1 resistive, I = 0.05 A with cos ϕ = 0.6.Short-circuit proof: quick-action fuse up to 8 A acc. to UL 198 G Type of enclosure: NEMA 3 (IP 54) 1/2 NPT conduit connection Connection: screw terminals 2 x AWG 18 (2 x 1.5 mm2)Adjusting pressure switch to the required switching pressureThe set switching pressure is obtained: with ambient temperature 32 °F to 140 °F (0 °C to60 °C) with increasing pressure➔with vertical diaphragm: accurately,➔with horizontal diaphragm: the switching pressure is approx. 0.08 " W.C. (0.2 mbar) higher than the reading➔with suspended diaphragm: the switching pressure is approx. 0.08 " W.C. (0.2 mbar) less than the reading. The readings are approximations. Adjustment –example DG 50 T3 = pressure test point The setting of 6 " W.C. (15 mbar) applies for➔excess pressure of +6 " W.C (+15 mbar),➔negative pressure of -6 " W.C. (-15 mbar) or➔differential pressure of 6 " W.C. (15 mbar) (+10 " W.C. (+25 mbar) at connection 1 or 4, +4 " W.C. (+10 mbar) at connection 2) Setting of switching pressure:● turn required value on the scale disk over the pointer. Checking of set switching pressure● Measure exact switching point: using a manometer at test point3 for excess pressure and by metering the voltage at NC 1 or NO 2●if necessary, re-adjust scale disk the readings are approximations!● Put cover plate on and press firmly, put cover back on and screw tight – first the two screws beside the scale disk.Gas pressure switches DG..T require little servicing.➔Conduct a function check once a year, or every six months for biologically produced methane.Accessories for DG..TCover with external adjustmentFit nipple with external hexagon into hexagon socket on the graduated disk. Screw on cover with seal and gland.Control lamp green220 V AC/240 V AC110 V AC/120 V AC (standard)48 V AC or DC24 V DC LED➔Connection to NO 2:lamp lights up with pressure➔Connection to NC 1:lamp lights up without pressure➔with 24 V DC LED note polarityControl LED red/green24 V DC LED red/greeen➔Connection to NO 2:LED lights up red or green with pressure➔Connection to NC 1:LED lights up red or green without pressure ➔note polarityFastening set with holding angle bracketsfor the various fastening e self-tapping screws for fixing the holding angle bracket to the switch.希望以上资料对你有所帮助，附励志名言3条：1、宁可辛苦一阵子，不要苦一辈子。