Vemer Iride, User Manual

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Iride Chronothermostat User Manual
• 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 instrument
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 device 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 high thermal inertia systems (cast-iron 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: the device is default configured to operate in on/off with hysteresis
set at 0.3°C. This configuration 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, dIF value (on/off regulation), band and period
(proportional regulation) see chapter “Regulation parameters” at page 29.
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