Safety Information; Application / Functional Description; Operating Instructions - STIEBEL ELTRON RTU-S UP Stiebel Bedienungs- Und Installationsanleitung

1. Safety information

Expert electricians only may open this device in due compliance with the wiring diagram
shown in the housing cover / on the housing / represented in the corresponding
operating instructions. All expert electricians charged with the execution of such works
must comply with the relevant safety regulations currently operative and in force.
Caution: The operation of the controller in the vicinity of other devices that do not comply
with the EMC directives may affect its functions. The company charged with the
installation of the device must, after the completion of the installation works, instruct the
user of the control system into its functions and in how to operate it correctly. These
operating instructions must be kept at a place that can be accessed freely by the
operating and/or servicing personnel in charge.

2. Application / functional description

The controller described in these instructions is provided for flush installation and has
been specially devised for the time-dependent control of the floor temperatures
produced by electric floor heating systems. An error message appears on the display
and an indicator lamps starts blinking red if no remote sensor has been connected or if
it is defective. An emergency operation function will be activated if such a fault is
detected and a 30% duty cycle maintained to prevent the related room from cooling
down thoroughly and protect it against frost damage. The activation time divides into a
3 minute ON and a 7 minute OFF time.

3. Operating instructions

The device is equipped with 4 touch keys, all of which have been marked by the
symbol . The functions allocated to them may vary in dependence on the operation
requirements. The related function is being indicated on the display which exists above
the corresponding keys. A special protective function helps prevent an inadvertent
activation of the touch keys. This function is activated 20 seconds after any of the touch
keys has last been activated. Actuating any of the touch keys deactivates this function
again for 2 seconds.
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