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8.9. WEEKLY CONTROL
Once weekly control function is selected, the user configures contact activation schedule.
Setting Operation schedule is described in section 7.9.
8.10. DHW BUFFER
The device will operate until the pre-set temperature values of buffer 'top' and ‘bottom' are reached – in order for the
pump to be switched off, both sensors must reach the pre-set temperature. After the pre-set temperature of buffer 'top'
is reached, the pump will still operate for the period of time set by the user as the delay time.
Moreover, the device may operate according to weekly program (described in detail in section 9), which controls the
temperature of the upper sensor. The user may choose which sensors will serve as top and bottom sensors.
Pre-set buffer temp. top - this function enables the user to define the pre-set temperature for the upper part of
the buffer (sensor should be placed in the upper part of the tank). Once this value is reached and the delay time
elapses, the pump is disabled (provided that the pre-set buffer temperature bottom has also been reached).
Pre-set buffer temp. bottom – this function enables the user to define the pre-set temperature for the lower
part of the buffer (sensor should be placed in the lower part of the tank).
Top hysteresis – this option is used to set the hysteresis for the top sensor. After pre-set buffer temp. top and
pre-set buffer temp. bottom have been reached, the device is switched off. It is activated again when the sensor
temperature drops to the pre-set value minus top hysteresis. (for example: if the pre-set buffer temp. top is 70°C
and the hysteresis value is 5°C, the device will be switched off when the temperature reaches 70 ºC whereas its
operation will be restored when the temperature drops to 65°C).
Bottom hysteresis – This option is used to set the hysteresis for the bottom sensor.
Delay – this device enables the user to define how long the device should remain active after the pre-set buffer
temp. top has been reached.
Weekly control - This function is described in detail in section 9.
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