EUROSTER UNI4
–
USER MANUAL
6
Switching off the unused zone.
◼
Mixer
◼
Mixer dynamics
Determines the time of mixer response to changes in the zone temperature. An
excessive value may cause frequent cycling of the mixer, whereas the insufficient
value may cause slowness in achieving the preset temperature.
◼
Mixer hysteresis
If the measured temperature of a zone differs from the preset one by half of the
value of preset hysteresis, then the mixer position is not corrected.
◼
Alarm temperature
CAUTION! Alarm temperatures for all zones should be selected carefully.
Incorrect setting of temperature level may cause improper operation or major
failure of the system components.
The alarm temperature should be preset as the maximum safe temperature for a
particular zone.
◼
Room thermostat
In this item, a user may switch off the inputs of room thermostats. In such a case the
central heating will be switched on regardless of the requests of thermostats.
◼
Weather compensator
Weather compensation provides a possibility to achieve thermal comfort regardless of
external temperature. The only requirement is to connect an outdoor temperature
sensor.
After switching the weather compensation on, temperatures of the CH zones for three
outdoor temperatures should be set. Based on those the controller calculates the
currently required zone temperatures every 10 minutes.
CAUTION! Temperatures must meet the condition of
T10ºC ≤ T0ºC ≤
T-
20ºC
otherwise, the control will not work properly.
◼
Maintenance operation
–
if a given zone does not require heating (the schedule is
not selected or room thermostat contact is open) the controller will respond in the
following way:
◼
stop
–
the pump will be switched off and the mixer closed,
◼
time-based
–
the zone will be switched on for a preset time with the preset idle
time, the zone temperature will be decreased by the value of the "
Reduction
”
setting,
◼
continuous
–
the pump does not switch off, the mixer reduces the zone
temperature by the value of the "
Reduction
” setting.
Settings for DHW circuit
◼
Switching the circuit on/off
In this item, a user may switch off the DHW circuit if not used.
◼
Hysteresis
It is a difference between the temperature at which the tank feeding pump is switched
off and on.
