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Special functions
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7.3.4. - Thermostat
Thermostat is used for time and temperature controlled additional heating.
Settings range: On, Off
Temperature values which are set too high can lead to scalding or damage to the system. Scalding pro-
tection must be provided by the customer!
Danger!
Caution
In Energy savings mode, different settings may apply, see e.g. T eco.
7.3.4.1. - Thermostat
Settings range: On, Off
7.3.4.2. - TH Set
Taget temperature at thermostat sensor 1. Below this temperature, additional heating is switched on, till
TH set + hysteresis is reached.
Settings range: 0-100°C / Default setting: 50
7.3.4.3. - TH hysteresis
Hysteresis of setpoint temperature.
Settings range: -20-+20K / Default setting: 10K
7.3.4.4. - Thermostat sensor 1
T set is measured with thermostat sensor 1.
When thermostat sensor 2 is connected, the relay switches on when T set is undershot at thermostat Sensor
1, and switches off when T set + hysteresis at thermostat sensor 2 is exceeded.
Settings range: S1-S8, VFS1-2, active storage / Default setting: none
7.3.4.5. - Thermostat sensor 2
Optional switch off sensor
When T set + hysteresis is exceeded at the optional thermostat sensor 2, the relay is switched off.
Settings range: S1-S8, VFS1-2, active storage / Default setting: none
7.3.4.6. - T eco
For Energy saving mode
When Energy saving mode is active: During solar loading T eco is used instead of TH set. When the tempera-
ture drops below T eco at thermostat sensor 1, the relay is switched on and heats up to T eco + hysteresis.
Settings range: 0-100°C / Default setting: 40°C
7.3.4.7. - Energy saving mode
Energy saving mode switches the heating on when T eco is undershot und heats up to T eco + hysteresis
when solar charge or solid fuel boiler is active.
Settings range: On, Off / Default setting: Off
7.3.4.8. - Periods
Thermostat activity times
Set the desired periods of time when the thermostat should be active. 3 periods can be set per day, settings
can also be copied to other days. Outside the set times the thermostat is switched off.
Setting range: from 00:00 to 23:59 /default setting: 06:00 to 22:00
