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The necessary basic settings required for
the control function of the 2nd heating cir-
cuit are made in menu “6. Settings DHW”.
The menu is closed by pressing “esc” or
selecting “Exit settings”.
DHW settings
6. DHW settings
Danger
This does not under any cir-
cumstances replace the safety
facilities to be provided by the
customer!
Minimum domestic hot water temperature
If outside the time periods set in the „Times“ menu (see 8.4), i.e. the DHW is disabled,
the temperature at the DHW sensor S3 drops below the one set here, the domestic hot
water pump (relay 4) and the additional heating (relay 5) is switched on.
Settings range: 10 °C to 60 °C / Default: 45 °C
6.1 DHW min
Minimum DHW temperature
If the temperature at the DHW sensor S3 drops below the temperature set here and
the DHW charging is enabled, the DHW charging (relay R4) and the additional heating
(relay R5) are activated.
Settings range: 10 °C to 60 °C / Default: 45 °C
6.2 DHW reference
Hot water hysteresis
The domestic hot water pump (relay R4) and and additional heating (relay R5) is swit-
ched off when the temperature at DHW sensor S3 reaches the temperatures set in the
menus „DHW min“ and „DHW reference“ plus the temperature difference set here.
Settings range: 2K to 20K / Default: 10K
6.3 DHW
hysteresis
Charge DHW from the buffer storage
DHW charging via relay R4 directly from the buffer storage is activated when the tem-
perature at buffer sensor S4 is at least 8 °C warmer than the DHW sensor S3. DHW
charging is deactivated again when the temperature difference drops to 4 °C or when
the temperature at DHW sensor S3 reaches the values set in „DHW min“ and „DHW
reference“
Settings range: On, Off / Default: Off
6.4 Buffer HW load
If this function is active during a DHW heating the reference
fl
ow temperature is set to
the minimum
fl
ow temperature to ensure that the mixer is closed.
Settings range: Yes, No / Default: No
6.5 DHW priority