HSK Heizstab 4 Mode D'emploi page 36

24. Regularly check if the radiator is filled with an adequate amount of heat-
ing medium. Regularly check the device for damage to ensure it is safe
to use.
25. Make sure that no water can enter the heating element housing.
26. The device must be disconnected from the mains during cleaning and
maintenance.
27. The pressure in the radiator should not exceed 1 MPa (10 bar). Ensure
that an air cushion of ca.8% of its volume is preserved.
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User manual — Heizstab 4