Controller Settings - EUROSTER 11Z User Manual

EUROSTER 11Z – USER MANUAL
8. RESTORING FACTORY SETTINGS / PERMANENT SCREEN LIGHT-UP
If it is needed to restore factory settings, the following steps should be taken:
• Keep the knob pressed and turn the controller on and off. "Fd" (Factory defaults) will
appear on the screen, once the knob is released, 0 will appear.
• Use the knob to select 0 or 1 and confirm.
• By selecting 0 you will be able to change screen backlight functions without restoring
factory defaults. By selecting 1 you will restore factory defaults.
• Next, "bl" (Backlight) will appear on the screen, once the knob is released, 0 will
appear.
• Use the knob to select 0 or 1 and confirm. Selecting 0 will result in automatic screen
backlight switch off after 1 minute of finishing controller operation, and selecting 1 will
result in permanent screen backlight.
• control and possibly correct the remaining controller settings.
In case of lack of confirmation within 5s the controller resumes operation as if no changes
have been introduced.

9. CONTROLLER SETTINGS

After being switched on the controller shows system condition. Turning the knob right result in
entering setting overview and change mode.
Controller configuration follows a method specified below: Chose the required parameter by
turning the knob. The controller will show the value (at the top) and number (at the bottom).
In order to change value of the shown parameter, push the knob (parameter value will start
pulsing), set the required value and confirm selection by pressing the knob. If the value should
not be changed (cancellation of changes), do not push the knob, but wait 10 seconds for the
setting to stop pulsing.
Setting windows have been number for convenience.
User can change the following parameters:
1. Central heating circulation temperature
This is medium temperature for central heating pump to switch on.
2. Central heating circulation hysteresis
Temperature difference at which central heating pump is switched on and off.
Conditions for pump switching on and off have been described in detail in chapter 10.
3. Hot water tank temperature
This is tank temperature that the controller is trying to keep.
REMARK: Keeping low tank temperature (about 35-40ºC) facilitates development of
bacteria including Legionella.
4. Tank temperature regulation hysteresis.
Hysteresis is equal to temperature difference at which the controller switches the pump
on and off. Conditions for pump switching on and off have been described in detail in
chapter 10.
5. Temperature difference between heat source and the tank
Heat source should have a higher temperature than the tank for two reasons: First, to
guarantee appropriate heating efficiency and second, to compensate heat losses
resulting from imperfect insulation of pipes connecting the boiler and the tank. If heat
source temperature is not high enough, hot water tank loading pump will not be
switched on.
6. Hot water heating priority
If hot water heating priority is switched on, the controller directs all the available power
for heating the tank. Therefore, till the moment the tank is heated up, central heating
circuit is switched off.
7. Reading correction - heat source temperature
This is the value which is added or deduced from the measured temperature. it allows
for correction of readings between the sensor placed on the pipe and the thermometer
on the boiler.
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