Modes; Overview Of Modes; Operating Mode; Control Mode - Grundfos TPE 2000 Series Installation And Operating Instructions Manual

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.

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

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 ist 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
Slave end
Jumper
Stop Min. Max.
Controlled
Constant Prop.
pressure pressure
6.3 Control
Max.
Q
9. Setting by means of R100.
6.2.1 Additional operating modes - TPED pumps
The TPED pumps offer the following additional operating modes:
• Alternating operation
Pump operation alternates every 24 hours. If the duty pump
stops due to a fault, the other pump will start.
• Standby operation
One pump is operating continuously. In order to prevent
seizing-up, the other pump is started for 10 seconds every 24
hours. If the duty pump stops due to a fault, the other pump
will start.
Select the operating mode by means of the selector switch in the
terminal box. See figures 5, 9 and 15.
The selector switch enables changeover between the operating
modes "alternating operation" (left position) and "standby
operation" (right position).
The switches in the two terminal boxes of a twin-head pump must
be set to the same position. If the switches are positioned
differently, the pump will be in standby operation.
Twin-head pumps can be set and operated in the same way as
single-head pumps. The duty pump uses its setpoint setting,
whether it is made by means of the control panel, via the R100 or
via bus.
Both pumps should be set to the same setpoint and
Note control mode. Different settings will result in different
operation when changing between the two pumps.
If the power supply to the pump is disconnected, the pump setting
will be stored.
The remote control R100 offers additional possibilities of setting
and status displays. See section

6.3 Control mode

The pump can be set to two primary control modes, i.e.
• proportional pressure
• constant pressure.
Furthermore, the pump can be set to constant curve.
Controlled operation
H H
H
H
set set
H
set
2
Q
Proportional Constant
pressure
pressure
Fig. 24 Controlled and uncontrolled operation
Proportional-pressure control
The head is reduced at falling water demand and increased at
rising water demand. See fig. 24.
Constant-pressure control
The pump maintains a constant pressure, irrespective of water
demand. See fig. 24.
Constant curve mode
The pump is not controlled. The curve can be set within the range
from min. curve to max. curve. See fig. 24.
The pumps have been factory-set to proportional pressure. See
section 6.4 Factory setting. In most cases, this is the optimum
control mode, and at the same time it consumes the least energy.
9. Setting by means of R100.
Uncontrolled
operation
H
Q Q
Constant
curve
15