Modes; Overview Of Modes; Operating Mode - Grundfos E Serie Instrucciones De Instalación Y Funcionamiento

The communication cable has a master end and a slave end as
shown in fig. 20.
Master end
White label
Fig. 20 Master end and slave end
On pumps with factory-fitted sensor, the master end and the
sensor are connected to the same terminal box.
When the power supply to the two pumps has been switched off
for 40 seconds and switched on again, the pump connected to the
master end will start up first.
5.7.1 Connection of two sensors
The sensor signal is copied to the other pump through the red
wire of the communication cable.
If, optionally, two sensors are connected (one sensor to each
terminal box), cut the red wire. See fig. 21.
Master end
White label
Fig. 21 Elimination of copied sensor signal
5.7.2 Elimination of alternating operation and standby
operation
If alternating operation and standby operation are not desired, but
the copied sensor signal (one sensor signal to two pumps) is
desired, cut the green wire. See fig. 22.
Master end
White label
Fig. 22 Elimination of alternating operation and standby
operation
5.7.3 Elimination of TPED function
If alternating operation and standby operation as well as the
copied sensor signal are not desired, remove the communication
cable completely.
14
Slave end
Jumper
Slave end
Jumper
Slave end
Jumper

6. Modes

Grundfos E-pumps are set and controlled according to operating
and control modes.

6.1 Overview of modes

Operating modes Normal
Control modes Uncontrolled
Constant
curve
1) In this example the pump is equipped with a differential
pressure sensor. The pump may also be equipped with e.g. a
temperature sensor in which case the description would be
constant temperature in control mode controlled.

6.2 Operating mode

When the operating mode is set to Normal, the control mode can
be set to controlled or uncontrolled. See section
mode.
The other operating modes that can be selected are Stop, Min. or
Max.
• Stop: The pump has been stopped.
• Min.: The pump is operating at its minimum speed.
• Max.: The pump is operating at its maximum speed.
Figure 23 is a schematic illustration of min. and max. curves.
H
Min.
Fig. 23 Min. and max. curves
The max. curve can for instance be used in connection with the
venting procedure during installation.
The min. curve can be used in periods in which a minimum flow is
required.
If the power supply to the pump is disconnected, the mode setting
will be stored.
The remote control R100 offers additional possibilities of setting
and status displays. See section
Stop Min. Max.
Controlled
Constant
1)
pressure
6.3 Control
Max.
Q
8. Setting by means of R100.