Wilo Stratos ECO Notice De Montage Et De Mise En Service page 22

English
ing the socket head screws securing the housing, the con-
nection can be turned so that the ventilation valve can be
brought to the vertical position regardless of the installation
position of the pump.
Control mode (Fig. 2 a, b):
Variable differential pressure ( p-v): The differential
pressure setpoint is increased linearly over the permitted
volume flow range between ½H and H. The differential pres-
sure generated by the pump is adjusted to the corresponding
differential pressure setpoint (Fig. 2a).
Constant differential pressure ( p-c): Only in the case of
Stratos ECO-ST and BMS: The differential pressure gener-
ated by the pump is kept constant over the permitted volume
flow range at the differential pressure setpoint set on the
control knob (Fig. 2b).
The pump automatically follows the night reduction of the
heating system through electronic evaluation of a tempera-
ture sensor. The pump then switches to minimum speed.
When the heating boiler heats up again, the pump switches
back to the pre-set setpoint stage. The automatic night
reduction system can be switched off (Fig. 1, item 2):
auto
NOTE:
If there is insufficient supply to the heating/air conditioning
system (heat output too low), check whether the night
reduction is switched on. Switch off the night reduction if
necessary.
22
Night reduction on, control mode at setpoint and
automatic temperature controlled night reduction
(further energy saving).
Night reduction off, control mode at setpoint.
Wilo AG 07/2006