ST-408N – user's manual
IV.c.4) Weekly control
When this option is selected, the device connected to the additional contact operates
according to the weekly program – the user sets time intervals (with the accuracy of
30 minutes) at which the contact will close.
IV.c.5) Buffer
This option should be selected when buffer is connected to the additional contact.
The device will operate until the set temperature of buffer 'down' has been reached.
After the temperature drops below the set value of the buffer 'up', the device is
switched on again. The user may choose the sensors which will serve as upper and
lower sensors.
IV.c.6) DHW buffer
This option should be selected when DHW buffer is connected to the additional
contact. The device will operate until the set temperature of buffer 'up' and 'down'
are reached – in order for the pump to be switched off, both sensors must reach the
set temperature. After the set temperature of buffer 'up' 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 IV.d.17), which controls the temperature of the upper sensor. The user
may choose which sensors will serve as upper and lower sensors.
IV.c.7) Operation control
If the user selects this option, the additional contact will control the operation of
another contact. If the device which is connected to the controlled contact fails to
switch on and the selected sensor fails to reach the set temperature within the delay
time, the controller activates the device which is connected to the controlling
contact. For this function to work correctly, the following settings need to be
configured:
•
set temperature – this function is used to define the set temperature which
must be reached by the selected sensor. If the temperature is reached, it
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