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Speed control
DT S
Set temperature difference
Adjustment range: 1.5 … 30.0 K [3.0 … 60.0 °Ra]
Factory setting: 10.0 K [20.0 °Ra]
RIS
Rise
Adjustment range: 1 … 20 K [2 … 40 °Ra]
Factory setting: 2 K [4 °Ra]
Note:
For pump speed control, the operating mode of the corresponding relay
must be set to Auto (adjustment channel MAN1 or slide switch position
centre respectively).
If the temperature difference reaches or exceeds the switch-on temperature dif-
ference, the pump switches on at 100 % speed for 10 s. Then, the speed is reduced
to the minimum pump speed value.
If the temperature difference reaches the adjusted set value, the pump speed in-
creases by one step (10 %). The response of the controller can be adapted via the
parameter Rise. Each time the difference increases by the adjustable rise value, the
pump speed increases by 10 % until the maximum pump speed of 100% is reached.
If the temperature difference decreases by the adjustable rise value, pump speed
will be decreased by one step.
Note:
The set temperature difference must be at least 0.5 K [1 °Ra] higher than
the switch-on temperature difference.
PUM
Pump control type
Selection: OnOF, PULS, PSOL, PHEA
Factory setting: PSOL
With this parameter, the pump control type can be adjusted. The following types
can be selected:
Adjustment for standard pump without speed control
• OnOF (pump on / pump off)
Adjustment for standard pump with speed control
• PULS (burst control via semiconductor relay)
Adjustment for high-efciency pump (HE pump)
• PSOL (PWM prole for a HE solar pump)
• PHEA (PWM prole for a HE heating pump)
Minimum speed
nMN
Minimum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 30 %
nMN, if ODB is activated: 50 %
In the adjustment channel nMN a relative minimum speed for a pump connected
can be allocated to the output R1.
Note:
The pump speed must be set to 100 % when auxiliary relays or valves are
connected.
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