Harvia Sentiotec Concept R CP-RCB-090 Instructions For Installation And Use Manual page 8

Instructions for installation and use p. 8/26
Never touch the sauna heater while it is operating. The surfaces
of the sauna heater and sauna stones become extremely hot.
the evaporator tank each time before starting combi mode. If the
overheating protection has switched off evaporator heating, or if
your sauna control unit reports a lack of water, allow the evaporator
to cool down BEFORE you pour water into the evaporator tank.
For your own safety, consult your supplier in the event of problems