《压力开关说明书》(参考Word)

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.
DG
1 Flush the pipework.
2 Use suitable sealing material.
3 If dirt can accumulate at port
3 or 4, use the fi lter, Order No. 74916199.
4 Fit the DG.
Tightness test
Adjusting the switching pressure ps
1Disconnect the system from the electrical power supply.
Wiring
DG
➔ 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 power rating.
➔ 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 4
5。