Service (User Manual)

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Service

• Band heaters must not be operated without control, as the risk of overheating is too great.
• Band heaters must be in full contact with the cylinder. Insufficient contact leads to partial overheating on the heating wire. This damages the insulation and can lead to a breakdown. The overstressed heating wire becomes brittle and breaks or burns through directly. For this purpose, tighten the fastening screws well.
• For diameters larger than 200 mm, we recommend using steel springs on the screw connections to ensure a permanently tight fit on the cylinder.
• Band heaters must not be operated in humid environments.
• The leads must not be strained (danger of tearing the leads off).
• The max. working temperature according to insulation given in the catalogue resp. internet must not be exceeded.
• Our heating elements are designed for being operated at defined voltages. Operation at higher voltages may reduce lifetime considerably or result in immediate failure (15% more voltage = 32% more power!).
• Install electric heating elements in systems, machines, and devices in such a way that they are easily accessible at all times and can be easily replaced if necessary. Heating elements are wear parts: they age due to temperaturerelated structural changes in the heating conductor material and can fail due to operational and applicationrelated influences (e.g., thermal expansion, vibration, corrosion, contact with aggressive media) as well as due to incorrect operation or control errors. In the event of a malfunction, replacement is necessary.
• In every practice application there are working and environmental parameters which cannot be calculated exactly in theory. That is why we recommend generally to test our flat heating elements in the application under real working conditions before series use.



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