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(if setpoint-band > environment temperature) or always off (if setpoint + band <
environment temperature).
• The regulation period which represents the duration of the regulation cycle
(activation time + deactivation time of heating) and it can have values of 10, 20 or
30 minutes.
During the operating, at the beginning of the regulation period, the chronothermostat
measures the environment temperature and it compares it with the programmed
setpoint; on the basis of this difference the activation time is calculated (and
consequently the deactivation time). The more the measured temperature is next to the
setpoint value – band, the more the activation time will be predominant in comparison
with the deactivation time; on the contrary, the more the measured temperature is next
to the setpoint value + band, the more the deactivation time will be predominant in
comparison with the activation time).
Once regulation period is passed, the chronothermostat compares again the
environment temperature with the setpoint and it updates the activation and
deactivation times for the new period.
The result of the proportional regulation is subordinated to the correct selection of the
parameters.
Select the value of the regulation type as follows:
• 10' for low thermal inertia systems (fan-coil)
• 20' for medium thermal inertia systems (aluminium radiators)
• 30' for medium thermal inertia systems (aluminium radiators)
Select the regulation band value as follows:
• broad band (5°C) for systems with high thermal gradient
• narrow band (0.5°C) for systems with low thermal gradient
Attention: in default status the chronothermostat is confi gured to operate in
on/off with hysteresis set at 0.3°C. This confi guration is suitable for the most
part of the situations and for this reason it's advisable to modify it only in
particular situations.
To modify the regulation type, hysteresis values (on/off regulation), band and
To modify the regulation type, hysteresis values (on/off regulation), band and
period (proportional regulation) see "Regulation parameters" at page 19).
period (proportional regulation) see "Regulation parameters" at page 19).
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CHRONOS Chronothermostat User Manual
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