Functions
Grundfos CUE
20
Setting the direction of rotation
The start-up guide begins the first time the CUE is con-
nected to supply voltage. While going through the start-
up
guide, the CUE tests and sets the correct direction
of rotation without changing the cable connections to
the motor.
The correct direction of rotation can be set in these
w
ays:
• automatic setting
• manual setting when the direction of rotation is visi-
ble
• manual setting when the direction of rotation is not
visib
le.
Automatic setting
The CUE automatically tests and sets the correct direc-
tion of rotation without changing the cable connections.
This feature is activated only if a flow or pressure sen-
sor is installed.
This test is not suitable for all pump types and will in
cert
ain cases not be able to determine for certainty the
correct direction of rotation. In these cases, the CUE
changes over to manual setting where the direction of
rotation is determined on the basis of the installer’s
observations.
Manual setting when the direction of rotation is
vi
sible
The correct direction of rotation is set manually without
changin
g the cable connections. This requires that it is
possible to observe the motor fan or shaft.
Manual setting when the direction of rotation is not
vi
sible
The correct direction of rotation is set manually without
changin
g the cable connections. This requires that it is
possible to observe the head or flow rate.
Status functions
The CUE shows these data:
• power consumption
• operating hours
• accumulated flow
• energy per m
3
or gallon (requires flow meter).
The status information can be shown in the display.
Power consumption
The value of the power consumption is an accumulated
value
calculated from the pump’s birth and cannot be
reset. No additional sensor is required.
Operating hours
The value of operating hours is an accumulated value
calcul
ated from the pump’s birth and cannot be reset.
No additional sensor is required.
Accumulated flow
The value of accumulated flow is calculated by means
of
a flow measurement from either a digital pulse input
or an analog input.
When using a digital input, the number of pulses is
count
ed and multiplied by the litre/pulse parameter in
order to get the accumulated flow.
When using an analog input, the accumulated flow
value
is updated every 10 seconds with the volume
pumped in that period.
Energy per m
3
or gallon
The actual energy per m
3
(kWh/m
3
) is calculated as
actual power consumption divided by actual flow rate.
Logging functions
Alarm and warning log
The latest five alarms and five warnings are logged with
a timestamp corresponding to the power on time after
the fault has occurred. The alarm and warning log can
be shown directly on the display.
See the warning and alarm list page 38.
Correlated histogram (setting via PC Tool)
The correlated histogram is a way to examine the joint
dist
ribution of two parameters. The logging for a corre-
lated histogram are count of the number of samples that
at
the same time are within a given interval of variable
1 and variable 2.
To Next Page
Loading...
Need help?
General
