Operation Controlled By External Input - KSB Calio SI Dual Installation & Operating Manual

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7 Operation

7.2.6 Operation controlled by external input

PWM signal
The pump set communicates with an external control system via a pump-integrated
2-way PWM interface. The pump control system sends the estimated flow rate Q to
the external control system and, in return, receives the maximum required
differential pressure. Based on the value received, the pump control system adjusts
the speed.
More information:
▪ PWM profile A (heating applications) (ð Section 7.2.6.1, Page 35)
▪ PWM profile C (solar applications) (ð Section 7.2.6.2, Page 37)
Analog signal 0 - 10 V
The pump set speed can be adjusted via an analog signal.
The pump set starts up with the minimum speed for its size at 3 V DC. The pump set
increases the speed in a linear fashion with the increasing input signal up to the
maximum readable voltage (10 V DC). When the input signal drops down to the
threshold value of 3 V DC, the pump set switches to its minimum speed. When the
input voltage drops below 1.5 V DC, the pump set stops. This prevents unnecessary
stopping and starting of the pump set at fluctuating input signals around the stop
threshold value (hysteresis).
More information:
▪ Operation controlled by analog signal 0 - 10 V (ð Section 7.2.6.3, Page 39)
Setting
Table 16: Selecting the application under External Input
Step 1: Activating the setting mode
▪ Press and hold the control button (●) for 3 seconds
– This will activate the display backlighting.
– The flashing symbol indicates the active operating mode.
Step 2: Selecting the External Input
▪ Press the control button (●) for a minimum of 0.5 seconds until
the symbol for External Input flashes.
Step 3: Selecting the application
▪ Select the application by pressing the control buttons (+) or (-).
– The bar diagram shows the active speed level.
PA = heating applications
PC = solar applications
AN = analog signal 0 - 10 V
- Step 4: Confirming the current setpoint
▪ Press and hold the control button (●) for a minimum of 3
seconds.
– The set setpoint flashes and is saved.
Calio SI Dual / Calio SI Therm