164
9. HEATING
Sen. source
Sen. sink
(optional)
If the temperature at the temperature sensor selected exceeds the adjusted DHW maximum
temperature, the speed decreases by the Increment value. The interval to the next measure-
ment and adaptation can be adjusted by means of the parameter Delay.
If the DHW maximum temperature is not reached after the delay time has elapsed, the speed is
increased by the increment value. The speed is not increased or decreased respectively within
the hysteresis.
If the DT function is activated, the pump switches on only if DTOn is exceeded, and switches
off if the temperature difference falls below DTOff.
Sen. flow rate
If the Valve option is activated, the output selected is activated when the pump is activated.
Temp. sensor
Circulation
Heating / Opt. functions / Add new function / Circulation
Adjustment
channel
Output
Type
Sensor
TOn
TOff
Timer
Delay
Runtime
Break time
Funct.
Sensor
The Circulation function can be used for controlling a circulation pump.
For the control logic, 5 variants are available:
• Thermal
• Timer
• Thermal + Timer
• Demand
• Demand + Timer
Thermal
The temperature at the allocated sensor is monitored. The allocated output switches on when
the temperature falls below the adjusted switch-on temperature. If the temperature exceeds the
switch-off temperature, the output switches off.
Timer
The output switches on during the adjusted time frames, outside of them it switches off.
Thermal + Timer
The output operates when the switch-on conditions of both above-mentioned variants are
fulfilled.
Demand
The allocated flow switch is monitored for circuit continuity. If circuit continuity is detected at
the flow switch, the output switches on for the adjusted runtime. After the runtime has ended,
the output switches off. During the adjusted break time, the output remains switched off even if
continuity is detected at the allocated sensor.
Adjustment range /
Description
selection
Output selection
Variant
Circulation sensor selection
Switch-on temperature
Switch-off temperature
Timer function
Demand switch-on delay
Circulation pump runtime
Circulation pump break time 10 ... 60 min
Activation / Deactivation
Switch input selection
Factory setting
system dependent
system dependent
Demand, Thermal, Timer,
Thermal
Therm.+Timer, Dem.+-
Timer
system dependent
system dependent
10 ... 59 °C
40 °C
11 ... 60 °C
45 °C
Yes, No
No
0 ... 3 s
0 s
01:00 ... 15:00 min
03:00 min
30 min
Activated, Deactivated,
Activated
Switch
-
-