Rotex Controller Series, Product Documentation

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EbV Product documentation THETA NORM/UNIT
8-34
8.2.4 Function Heating Limit
This parameter supplements the summer switch-off function. It deactivates the respective heating circuit as
soon as the computed flow temperature setpoint approaches the present room temperature setpoint.
The parameter heating limit can be activated separately for each heating circuit.
Function: Switch-off: Flow-set < (room-set + heating limit setting)
Switch-on: Flow-set > (room-set + heating limit s 2K)
Example: Room setpoint = 22 °C, heating limit setting = 2 K
Switch-off at flow setpoint 24 °C (22°C + 2K)
Switch-on at flow setpoint 26 °C (22°C + 2K + 2K)
Conditions: The SUMMER SWITCH-OFF function (menu SYSTEM - parameter 04) has priority
over the HEATING LIMIT function.
The FROST PROTECTION function (menu SYSTEM - parameter 05) has priority
over the HEATING LIMIT function.
8.3 Domestic hot water control (..B..)
8.3.1 DHW Tank Loading (DHW)
Function: The output controls at request a DHW loading pump during the relevant operating
times.
DHW Day: Domestic Hot Water-daytime temperature
The DHW (Domestic Hot Water-) daytime temperature is set with a key on the user
interface. The DHW daytime temperature provides for the desired hot water
temperature during DHW operating times in the AUTOMATIC and SUMMER and
during the PARTY and HEATING operating modes.
This setting is the initial value for the nominal temperatures that can be set for each
heating cycle in the switching-time programs. The temperature settings in the
switching time programs are automatically adjusted when the DHW daytime
temperature is changed.
Example:
Before: Temperature setting hot water daytime temperature: 50 °C
Temperatures in switching-time program:
5:00 - 8:00 60 °C
08:00 - 16:00 50 °C
16:00 - 22:00 60 °C
Operation:
Note on operation Key / parameter tree Parameter
Offset heating limit
UNMIXED CIRCUIT
or
MIX. VALVE-1
or
MIX. VALVE-2
PARAMETER 07