Wilo Stratos ECO Serie Instrucciones De Instalación Y Funcionamiento página 25

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Control mode (Fig 2):
Variable differential pressure ( p-v): The differential pres-
sure setpoint levels being proportionally increased between
½H and H over the permissible flow range. The pump-gener-
ated differential pressure will thus be controlled to the
respective level.
The pump automatically responds to the night setback of
the central heating installation by electronic evaluation from
a temperature sensor. The pump will then switch to the min-
imum speed. On renewed boiler heat up the pump will switch
back to the previously adjusted setpoint level. The night set-
back control can be switched off (Fig. 1, Item 2):
• auto: Night setback ON, control operation to the preselected
setpoint value and automatic, temperature-activated night
setback (additional power savings).
setpoint value.
Factory setting: Night setback OFF.
NOTE:
In the case of insufficient heating/cooling capacity of the
installation (too low a heat transfer) it must be checked
whether the night setback control is on. In this case it must be
switched off.
Operating elements (Fig 1):
• Dial knob for the differential pressure setpoint (Fig. 1, Item 2).
• Setting range:
• Stratos ECO 25(30)/1-3: H
• Stratos ECO 25(30)/1-5: H
• Stratos ECO-Z 25/1-5: H
22
: Night setback OFF, control operation to the preselected
= 1 m, H
min
max
= 1 m, H
min
max
= 1 m, H
= 5 m
min
max
= 3 m
= 5 m
Wilo AG 06/2005

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