English
- 56 -
Orus Programmable Thermostat User Manual
- 57 -
Orus Programmable Thermostat User Manual
REGULATION TYPE
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 output relay follows the
following logic:
relay ON
SET-DIFF SET
relay OFF
relay ON
SET+DIFFSET
relay OFF
Temperature
increasing
heating mode cooling mode
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
The regulation band represents the temperature interval, centered on the
setpoint, in which the proportional regulation is checked.
Emergency regulation
During winter operation, in case of sensor failure, in order to avoid
problems regarding freezing, the programmable thermostat 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”.
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