Grundfos CRE Serie Instrucciones De Instalación Y Funcionamiento página 13

6.3 Control mode
6.3.1 Pumps without factory-fitted sensor
The pumps are factory-set to control mode uncontrolled.
In control mode uncontrolled, the pump will operate according to
the constant curve set, see fig. 15.
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Fig. 15 Pump in control mode uncontrolled (constant curve)
6.3.2 Pumps with pressure sensor
The pump can be set to one of two control modes, i.e. controlled
and uncontrolled, fig. 16.
In control mode controlled, the pump will adjust its performance,
i.e. pump discharge pressure, to the desired setpoint for the
control parameter.
In control mode uncontrolled, the pump will operate according to
the constant curve set.
Controlled
H
H
set
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Fig. 16 Pump in control mode controlled (constant pressure)
or uncontrolled (constant curve)
7. Setting up the pump
7.1 Factory setting
Pumps without factory-fitted sensor
The pumps have been factory-set to control mode uncontrolled.
The setpoint value corresponds to 100 % of the maximum pump
performance (see data sheet for the pump).
Pumps with pressure sensor
The pumps have been factory-set to control mode controlled.
The setpoint value corresponds to 50 % of the sensor measuring
range (see sensor nameplate).
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Uncontrolled
H
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8. Setting by means of control panel
The pump control panel, see fig. 17, incorporates the following
buttons and indicator lights:
• Buttons, and , for setpoint setting.
• Light fields, yellow, for indication of setpoint.
• Indicator lights, green (operation) and red (fault).
Light fields
Indicator lights
Fig. 17 Control panel, three-phase pumps, 1.1 - 22 kW
8.1 Setting of operating mode
Settings available:
• Normal
• Stop
• Min.
• Max.
Start/stop of pump
Start the pump by continuously pressing
setpoint is indicated. This is operating mode Normal.
Stop the pump by continuously pressing
fields are activated and the green indicator light flashes.
Setting to Min.
Press continuously to change to the min. curve of the pump
(bottom light field flashes). When the bottom light field is on,
press for 3 seconds until the light field starts flashing.
To return to uncontrolled or controlled operation, press
continuously until the desired setpoint is indicated.
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Fig. 18 Min. curve duty
Buttons
until the desired
until none of the light
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