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Installation Indications, functions and options MessagesCommissioningOperation and function
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 MAN).
If the temperature difference reaches or exceeds the switch-on temperature differ-
ence, 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, n1MN, if ODB is activated: 50 %
In the adjustment channel nMN, a relative minimum pump speed for a pump con-
nected 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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