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.

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.