Other Energy-Saving Operating Modes; General Pump Functions; Double Pump Mode - Wilo Stratos 1.5x3-40 Instrucciones De Instalación Y Funcionamiento

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6.1.2 Other energy-saving operating modes

• Speed regulation mode operation: The speed of the pump is kept at an
externally set constant speed between minimum and maximum speeds (fig. 9).
The speed regulation mode deactivates the differential pressure control.
• In the "auto" operating mode (factory default setting) the pump is able to
recognize a minimum system heat output requirement due to a sustained drop
in the system temperature and then automitically switch to "Autopilot" night
setback mode. If the heat output requirement rises, the pump automatically
switches to standard mode. This setting ensures that the pump's energy
consumption is reduced to a minimum and in most cases is the optimum setting.

6.1.3 General pump functions

• The pumps are fitted with an electronic overload protection system which
switches the pump off should it become overloaded.
• The control module is equipped with a non-volatile memory for data storage.
What this means is that data is saved, even during long periods of down time.
Once the voltage returns the pump starts operating again with the values set
before the power outage.
• Pump kick: If the pump has been switched off externally by the IF (interface)
device (Ext.Off, 0...10 V) or IR module it will automatically run for a short time
once every 24 hours to exercise the pump.
Connections to the building management system (BMS)
• FC: A collective fault contact FC (potential-free closed contact) can be
connected to a control point (building management system) as standard. The
internal contact is closed if the pump is turned off, or there are no problems or
failures on the part of the control module. The faults are described in detail in
chapter 10.
• IF(Interface) modules (accessory):
Analog interfaces are available in the form of add-on IF modules for connecting
to external control system (e.g. DDC/BMS).

6.1.4 Double pump mode

Two corresponding single pumps in a parallel pump installation can be fitted
with built-in double-pump management.
• Stratos IF module: Two IF modules connected via the DP (double pump)
interface are required for communication between pumps. In addition to double
pump management, the IF modules provide other interfaces for the double
pump.
This double pump management has the following functions:
• Master/Slave: Both pumps are controlled by the master. All settings are made
by the master.
12 Subject to technical alterations! WILO AG 05/2007