16
5.6.2 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.
Fig. 22
Elimination of "alternating operation" and
"standby operation"
5.6.3 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
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
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.
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 electricity 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
.
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 10 sec.
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 figs. 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 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.
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
6.3 Control mode
The pump can be set to two control modes, i.e:
•
controlled
•
uncontrolled
.
In control mode
controlled
, the pump will adjust its performance
to the desired setpoint for the control parameter (pressure,
differential pressure, temperature, differential temperature or
flow).
In control mode
uncontrolled
, the pump will operate according to
the constant curve set.
Fig. 24
Pump in control mode controlled (differential pressure
control) and in control mode uncontrolled
The pumps have been factory-set to control mode uncontrolled,
see section
.
TM
04
54
96
33
09
Operating modes
Normal
Stop
Min
Max
Control modes
Uncontrolled
Controlled
Constant
curve
Constant
pressure
1)
TM
00
55
47
09
95
Jumper
White label
Master end
Slave end
Q
H
Max.
Min.
Note
Both pumps should be set to the same setpoint
and control mode. Different settings will result in
different operation when changing between the
two pumps.
TM
0
0
7
668
0
404
Q
H
set
H
Q
H
Controlled
Uncontrolled
