Description And Function; Description Of The Pump; Operation Of The Pump; Infrared Interface - Wilo Stratos Betriebsanleitung

6 Description and function

6.1 Description of the pump

The high-efficiency pumps Wilo-Stratos are glandless pumps with integrated
differential pressure control and ECM technology (Electronic Commutated
Motor). The pump can be installed as single (Fig. 1a) or double pump (Fig. 1b).
1 Control module

1.1 Infrared interface

1.2 LC display
1.3 Control button
2 Direction-of-flow symbol
3 Thermal insulation
6.2 Function of the pump
There is a control module (Fig. 1a, item 1) in axial design on the motor housing,
which controls the differential pressure of the pump to a setpoint within the
control range. Depending on the control mode, the differential pressure follows
different criteria. In all control modes, however, the pump adapts itself contin-
uously to the changing power requirements of the unit, which is the case espe-
cially when thermostatic valves, zone valves or mixers are used.
The main advantages of the electronic control are the following:
• Energy savings and hence reduction of the operating costs,
• Reduction of flow noises,
• Reduction of the number of differential pressure valves required.
The high-efficiency pumps of the Wilo-Stratos-Z/-ZD series are specially
adapted to the operating conditions in drinking water circulation systems due
to the choice of material and design.
If pumps of the Wilo-Stratos-Z/-ZD series in grey cast iron version (pump hous-
ing made of grey cast iron) are used in drinking water circulation systems, the
national regulations and guidelines should be complied with as applicable.

6.2.1 Operating modes

The Stratos series can be operated in "Heating" or "Cooling/air-conditioning"
operating modes. The two operating modes are distinguished from one another
in terms of their tolerance for faults in the handling of fault signals that occur.
"Heating" operating mode:
Faults are handled in a tolerant fashion (as is normally the case), e.g. depending
on the type of fault, the pump does not indicate a fault until the same fault has
occurred repeatedly within a particular period. See Chapter 10.1 and flow dia-
gram - fault / warning signal during "HV operation".
Installation and operating instructions Wilo-Stratos/-D/-Z/-ZD
English
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