Information On Settings - KSB CalioTherm Pro 25 Installation & Operating Manual

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7 Operation
Symbol Description
DUAL Dual-pump Operation operating mode
▪ Symbol lights up when this operating mode is active.
▪ Symbol flashes when this operating mode sends a stop
command.
SERVICE General fault message
▪ An error code (E01 - E17) is shown on the display.
7.2 Operating modes

7.2.1 Information on settings

The pump set is fitted with a hydraulic controller for setting the head setpoint, based
on which the pump set's speed is calculated and adjusted. The head setpoint is
determined by the set operating mode and the selected setpoint. The functionality of
the hydraulic controller and its settings via the KSB ServiceTool are described in the
KSB ServiceTool supplementary operating manual (reference number 1157.801).
For common applications such as two-pipe systems Proportional-pressure Control (Δp-
v) is the recommended operating mode. This operating mode offers an extended
control range with additional potential savings compared to Constant-pressure
Control (Δp-c). Depending on the balancing of branch circuits, undersupply may
occur at a consumer installation.
The Constant-pressure Control operating mode (Δp-c) can be selected as an option
(e.g. for underfloor heating systems). If noises are audible at low flow rates, select
the Proportional-pressure Control operating mode (Δp-v).
The setting of the discharge head setpoint depends on the piping curve of the system
and on the heat requirements. As standard the operating mode is set to Constant-
pressure Control (Δp‐k) and a setpoint of 60 %.
CalioTherm Pro
Unit
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