EIO
-55
5
Temperature Modes
The thermostat controls to the target temperature by switching the relay ON/OFF as required. The
control logic has hysteresis i.e. in the heating mode the temperature has to exceed the target setpoint
plus the hysteresis to switch the relay OFF to prevent fast on/offs. In cooling mode this operates in
reverse. The diagram below illustrates the temperature control operation.
The target temperature is typically adjusted by the user by pressing UP & DOWN buttons. The target
temperature is changed in different operating situations;
•
COMFORT MODE; target temperature as adjusted by the user (or via the networked
system) and displayed on the screen
•
ECONOMY MODE; target temperature switched to the ECONOMY setpoint
•
OFF MODE; the thermostat is OFF, but FROST setpoint is active protecting the building
Centigrade to Fahrenheit
ECO Mode
EIO
-55 Series has Fahrenheit to Celcius icons on the top
of the Home Screen. From this icon it is possible to change
the units by touching this icon.
This option is particularly useful in hospitality applications
where the client base is expected to be international.
NOTE:
EIO
-55 series has all configuration parameters
displayed in Fahrenheit only.
The thermostat is switched to ECO mode via network
or via digital input. The thermostat operates also in the ECO
mode when the Holiday mode has been activated.
In the ECO mode the thermostat controls to the ECO
heating/cooling setpoint and the current target setpoint is
displayed on the screen.
When in the ECO mode, the ECO mode can be cancelled by
pressing the ECO icon on the front screen. Last command
controls the thermostat state i.e if the thermostat has been
switched to ECO mode via a digital input or over the network, the
user can cancel the mode through the touchscreen.
OFF Mode
The thermostats can be switched to OFF mode via
the touchscreen, digital volt-free input (e.g. time
clock) or via the communication network (system
configuration). The thermostat switches also to OFF
mode when the cleaning mode has been activated.
In the OFF mode the current Frost Setpoint is
displayed as the target temperature.
When in OFF mode if room temperature drops below
the Frost Setpoint, the frost protection is activated,
the SNOWFLAKE icon is displayed on the screen
and the relay output is switched ON. When the
thermostat has been overridden to OFF mode via the
network, or a digital input transition, the user can
cancel the OFF mode by pressing the OFF icon.
Similarly, a networked thermostat driven to OFF
mode by the user can be overridden back to
COMFORT mode using the network master.
Boost
Holiday Mode
Cleaning Mode
The thermostat relay can be switched ON for a timed period by activating the BOOST function. The
BOOST overrides the automatic temperature control and switches the output ON. As default the boost
time is set to 0 (deactivated).
After entering FURTHER INFORMATION screen, by selecting the HOLIDAY icon, it is possible to set
the number of days of holidays. The available range is 0-31 days. After setting the holiday, the
thermostat immediately switches to OFF mode (alternatively
EIO
can switch to ECO MODE during
holidays, see configuration parameters).
By setting holiday to 0 or just by pressing ENTER button the thermostat switches to permanent
HOLIDAY MODE. The HOLIDAY MODE can be cancelled by pressing the HOLIDAY ICON.
After entering FURTHER INFORMATION screen, by selecting the CLEANING icon, it is possible to
