EUROSTER 1100Z – USER MANUAL
3
d. DHW priority
•
for switching the DHW priority on/off simultaneously press the two switches under the
display until the right outermost dot on the LED display changes its status. The DHW
priority is on when the light comes up, and off - when the light is off.
e. cylinder cooling protection
•
the function is active by default and indicated by continuous (not blinking) display at
controller start up.
•
for deactivating the cooling protection press either of the presetting switches while
powering up the controller with the mains switch (~). Deactivation of the function is
indicated by blinking of display (figures 88) two times before displaying the current
temperature.
•
for activating the cooling protection repeat the above described procedure.
f. setting the temperatures
•
setting the temperature for the DHW circulating pump: press the left-hand switch under
the display – the figures will start blinking indicating that the current DHW temperature
setpoint is being displayed,
•
use the right-hand or left-hand switches to increase/ decrease the displayed
temperature setpoint, as appropriate,
•
after ca. 4 sec. the display will stop blinking indicating that the preset temperature has
been stored. The display will return to displaying the current temperature, as measured
by the sensor on the heating circuit.
•
setting the temperature for the heating water circulating pump: press the right-hand
switch under the display – the figures will start blinking indicating that the current DHW
temperature setpoint is being displayed,
•
use the right-hand or left-hand switches to increase/ decrease the displayed
temperature setpoint, as appropriate,
•
after ca. 4 sec. the display will stop blinking indicating that the preset temperature has
been stored. The display will return to displaying the current temperature, as measured
by the sensor on the heating circuit.
g. automatic operation mode
•
set the right hand switch (
►
) to 0
Cooling protection on:
•
the DHW pump is operated as follows: the pump is switched on when the temperature
measured by the DHW sensor has dropped below the setpoint and the heating water
temperature is higher by 6°C than the cylinder temperature, as a protection against
excessive cooling. With active cylinder cooling protection the controller will switch off
the heating water circulating pump. The DHW circulating pump will be switched off
when the temperature on the hot water cylinder has risen 1°C above the setpoint or the
temperature difference between the boiler and the DHW cylinder has reached 4°C. The
pump will be restarted when the temperature on the DHW cylinder has dropped by 2°C
below the setpoint.
•
the heating water circulating pump is operated as follows: the pump is switched on
when the temperature measured by the heating water sensor has risen by 2°C above
the setpoint and it is switched off when the temperature has dropped by 3°C below the
setpoint. With active DHW priority the heating water circulating pump will be switched
on only when the DHW pump is off.
Cooling protection off:
•
heating of water in the cylinder is governed solely by the temperature measured by the
DHW sensor. The pump is switched on when the temperature has dropped below the
setpoint and switched off when it has risen by 1°C above that setting. The operation of
the heating water pump is the same as described for operation with active cooling
protection.
