EB 3018 EN 9-1Servicing9 ServicingThe regulator does not require any mainte-nance. Nevertheless, it is subject to naturalwear, particularly at the seat, plug and oper-ating diaphragm and electric actuator. De-pending on the operating conditions, checkthe regulator at regular intervals to avoidpossible malfunctions. Plant operators areresponsible for drawing up an inspectionand test plan. Details on faults and how toremedy them can be found in the 'Malfunc-tions' section.The work described in this section is only tobe performed by personnel appropriatelyqualified to carry out such tasks.We recommend removing the regulator fromthe pipeline before performing any mainte-nance or service work.Risk of fatal injury due to electric shock.Î Upon installation of the electric cables,you are required to observe the regula-tions concerning low-voltage installationsaccording to DIN VDE 0100 as well asthe regulations of your local power sup-plier.Î Use a suitable voltage supply whichguarantees that no dangerous voltagesreach the device in normal operation orin the event of a fault in the system orany other system parts.Î Only perform the electrical connectionafter switching off the supply voltage.Make sure the supply voltage cannot beswitched on again unintentionally.DANGER!Risk of burn injuries due to hot or cold com-ponents and pipeline.Regulator components and the pipeline maybecome very hot or cold. Risk of burn inju-ries.Î Allow components and pipelines to cooldown or warm up to the ambient tem-perature.Î Wear protective clothing and safetygloves.Risk of personal injury due to residualprocess medium in the regulator.While working on the regulator, residualprocess medium can escape and, dependingon its properties, may lead to personal in-jury, e.g. (chemical) burns.Î Wear protective clothing, safety glovesand eye protection.Risk of regulator damage due to exces-sively high or low tightening torques.Observe the specified torques when tighten-ing regulator components. Excessive tighten-ing torques lead to parts wearing out morequickly. Parts that are too loose may causeleakage.Î Observe the specified tightening torques(see 'Tightening torques' in Annex).WARNING!WARNING! WARNING!NOTICE!