PAW FC3.10 - Modulating Hot Water Temperature

16 Description of function
36 99E13331xx-mub-en - V07 2021/03
NOTICE
If the three-way valve was not activated in the last 24 hours, it is opened and closed
automatically. This prevents that the valve seizes up after a longer downtime.
Parameters
Meaning
Adjustment range
Factory setting
Stratification of return Activates the function On, Off Off
Relay selection Selects the relay Relay 1,
Relay 2
Relay 2
Thermostat mode Submenu for settings of
the thermostat mode
On, Off On
Switch-on
temperature
Switch-on temperature 20 ... 60 °C 35 °C
Hysteresis Hysteresis 1 ... 20 K 5 K
Differential mode Submenu for settings of
the differential mode
On, Off Off
ΔT on Switch-on temperature
difference
1 ... 20 K 10 K
ΔT off Switch-off temperature
difference
1 ... 20 K 6 K
Sensor selection Selects the sensor T-CW, external
sensor (S2 (only for
FriwaMini), S3)
T-CW
16.3 Modulating hot water temperature
This function adapts the defined nominal temperature of the hot water if the temperature level in
the storage tank is not sufficient.
The temperature is decreased when the flow temperature (T-VL) is lower than the nominal
temperature (D.H.W. set temperature) + 5 K.
The decreased nominal temperature is dynamically defined as follows:
Nominal temperature (new) = nominal temperature – 5 K.
After a new withdrawal, the controller starts with the decreased nominal temperature.
Only when the flow temperature (T-VL) is 12 K higher than the decreased nominal temperature,
it is increased again by 5 K.
Parameters
Meaning
Adjustment range
Factory setting
Modulating hot water
temperature
Activates the
function
On, Off Off