English (GB)
42
14.18
Predefined setpoints
This function is only available if an advanced functional module is
fitted in the pump:
* See section
22. Identifying the functional module
You can set and activate seven predefined setpoints by
combining the input signals to digital inputs 2, 3 and 4 as shown
in the table below.
Set the digital inputs 2, 3 and 4 to "Predefined setpoints" if all
seven predefined setpoints are to be used. You can also set one
or two of the digital inputs to "Predefined setpoints" but this will
limit the number of predefined setpoints available.
Example
Figure
shows how you can use the digital inputs to set seven
predefined setpoints. Digital input 2 is open and digital inputs 3
and 4 are closed. If you compare with the table above, you can
see that "Predefined setpoint 6" is activated.
Fig. 68
Principle sketch showing how predefined setpoints
function
If all digital inputs are open, the pump will either stop or run at the
normal setpoint. Set the desired action with Grundfos GO or with
the advanced control panel.
Factory setting
See section
.
14.19 Temperature influence
When this function is enabled in proportional- or
constant-pressure control mode, the setpoint for head will be
reduced according to the liquid temperature.
Temperature influence can be set to function at liquid
temperatures below 80 or 50 °C. These temperature limits are
called T
max.
. The setpoint is reduced in relation to the head set (=
100 %) according to the characteristics below.
Fig. 69
Temperature influence
In the above example, T
max.
= 80 °C has been selected. The
actual liquid temperature, T
actual
, causes the setpoint for head to
be reduced from 100 % to H
actual
.
The temperature influence function requires the following:
• proportional-pressure or constant-pressure control mode
• pump installed in flow pipe
• system with flow-pipe temperature control.
Temperature influence is suitable for the following systems:
• Systems with variable flows, for example two-pipe heating
systems, in which the enabling of the temperature influence
function will ensure a further reduction of the pump
performance in periods with small heating demands and
consequently a reduced flow-pipe temperature.
• Systems with almost constant flows (for example one-pipe
heating systems and underfloor heating systems) in which
variable heating demands cannot be registered as changes in
the head as is the case with two-pipe heating systems. In such
systems, the pump performance can only be adjusted by
enabling the temperature influence function.
Selecting the maximum temperature
In systems with a dimensioned flow-pipe temperature of:
• up to and including 55 °C, select T
max.
= 50 °C
• above 55 °C, select T
max.
= 80 °C.
Factory setting
See section
Pump variant
Predefined setpoints
TPE3, TPE3 D
●
*
TPE2, TPE2 D
●
*
Function (terminal)
FM 200*
(standard)
FM 300*
(advanced)
Predefined setpoints
-
●
Digital inputs
Setpoint
2
3
4
0
0
0
Normal setpoint or stop
1
0
0
Predefined setpoint 1
0
1
0
Predefined setpoint 2
1
1
0
Predefined setpoint 3
0
0
1
Predefined setpoint 4
1
0
1
Predefined setpoint 5
0
1
1
Predefined setpoint 6
1
1
1
Predefined setpoint 7
0: Open contact
1: Closed contact
TM
06
42
69
18
15
0
1
2
3
4
5
6
7
Digital input 4
Setpoint 1
Setpoint 2
Setpoint 3
Setpoint 4
Setpoint 5
Setpoint 6
Setpoint 7
Digital input 3
Digital input 2
Actual setpoint
Stop
Normal
setpoint
Pump variant
Temperature influence
TPE3, TPE3 D
●
TPE2, TPE2 D
-
T
M
05
79
11
1
6
1
3
Note
You cannot use the temperature influence function in
air-conditioning and cooling systems.
H
T [°C]
30 %
20
50
80
100 %
H
actual
T
actual
H
Q
