Regulation Type - Vemer Mithos RF User Manual

Emergency regulation
During winter operation, in case of sensor failure, in order to avoid problems
regarding freezing, the chronothermostat activates the relay for 10 minutes every 4
hours and field (16) will display the "---" symbol.
Restoring default parameters
Simply pressing the "R" key will not cause a total reset of the instrument. To do so
and allow the loading of the default values, it is necessary to press the "R" key and
then, within 3 seconds, the " " key. The display will show the writing "dEF".
• ON/OFF regulation
The default regulation type is ON/OFF with deactivation in correspondence with the
setpoint and with differential set to 0.3°C.
During on/off operation mode, the relay of remote actuator follows the following
logic:
heating mode
relay ON
relay OFF
SET-DIFF
Temperature
increasing
• Proportional regulation
During heating mode the proportional regulation can be chosen; in certain types
of systems, this allows to improve the regulation, in order to obtain a constant
temperature.
This regulation activates the ON or OFF relay within a predefined regulation cycle on
the basis of the gap of the temperature measured by the setpoint value.
The necessary parameters for the definition of this mode are:
- the regulation band
- the regulation period

REGULATION TYPE

cooling mode
relay ON
relay OFF
Temperature
increasing
- 56 -
Mithos Chronothermostat User Manual
SET SET+DIFF