2. Safety information
3
GB
Installation must be carried out and inspected by a specialist or
under his supervision.
For assembly:
• Suitable for use in ambient conditions with normal
contamination levels
• Use the appropriate Grässlin accessories for wall
surface-mounting.
If correctly installed in accordance with VDE 0100, Part 40,
the parts with which contact is still possible can be regarded
as double-insulated (protection class II).
For operation:
• We place high demands on the EMC interference resistance of
the electronics when developing our products. The interference
immunity achieved significantly exceeds the currently valid
requirements of the appropriate EN standards.
• In individual cases, check whether additional protection
measures are still necessary, e.g. the installation of appropriate
components (varistor, suppresser diode, RC element).
• In extreme cases, it is recommended to install another module,
e.g. isolating relay or switching contacter, mains interference
suppresser filter.
For operation:
• No metallic pointed objects (e.g. needles) may be used on keys
pressed with a tool.
Important:
• Only safety extra-low voltage may be connected for operating
the clock with safety extra-low voltage.
• When operating the clock with function extra-low voltage, either
the mains voltage (230 V AC) or function extra-low voltage may
be connected. In these cases, it is not permissible to connect
safety extra-low voltage.
