Setting The Pump; Control Modes; Operating Modes; Additional Operating Modes - Single-Phase Tped Pumps - Grundfos LME Series Installation And Operating Instructions Manual

Communication cable for single-phase TPED pumps only:
Connect the communication cable between the two pump heads.
A good frame connection near the cable clamp must be made.
See also the above description.
Fig. 14
When connecting the communication cable, the following must be
observed:
If one sensor is connected, insert the communication cable plugs
into the sockets in the terminal boxes as shown in fig. 15.
Fig. 15
If two sensors are connected, cut the red wire, see fig. 16.
Fig. 16
If one sensor is connected, it is connected to the master pump to
the left of the flow direction.
If two sensors are connected, one sensor is connected to the
master pump (to the left of the flow direction) and the other to the
slave pump, see fig. 17.
Fig. 17
Master
Master

3. Setting the pump

3.1 Control modes

E-pumps can be set to two control modes, i.e:
• controlled-operation or
• uncontrolled-operation.
In controlled-operation mode, the pump will adjust its perform-
ance to the desired setpoint for the control parameter (pressure,
differential pressure, temperature, differential temperature or
flow). Figure 18 shows a differential-pressure controlled pump as
an example of controlled operation.
In uncontrolled-operation mode, the pump will operate accord-
ing to the constant curve set.
Fig. 18
Controlled operation
H
H
set
Q
The pumps have been factory-set to uncontrolled operation, see
section 3.3 Factory setting.

3.2 Operating modes

The following operating modes can be selected:
• Stop,
• Min.,
• Normal (controlled or uncontrolled operation),
• Max.
The operating modes can all be set on the pump control panel.
Fig. 19
H
Min.
The min. curve can be used in periods in which a minimum flow is
required.
The max. curve can for instance be used in connection with the
venting procedure during installation.
If the electricity 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 5. Setting by means of R100.
3.2.1 Additional operating modes – single-phase TPED
pumps
The single-phase TPED pumps offer the following additional op-
erating 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 10 sec.
every 24 hours. If the duty pump stops due to a fault, the other
pump will start.
The operating mode is selected by means of a selector switch in
each terminal box, see fig. 9.
Uncontrolled operation
H
Q
Max.
Q
9