Install Instructions

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The signal relay is operated as follows:
• Not active
The signal relay is deactivated.
• Ready
The signal relay is active when the pump is running or has
been set to stop, but is ready to run.
• Alarm
The signal relay is activated together with the red indicator
light on the pump.
• Operation
The signal relay is activated together with the green indicator
light on the pump.
13.7 Setpoint influence
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Setpoint influence
• External setpoint function
• Temperature influence.
13.7.1 External setpoint function
The external setpoint function is an external 0-10 V or 4-20 mA
signal that will control the pump speed in a range from 0 to 100 %
in a linear function. See fig. 32.
Fig. 32 External setpoint function, 0-10 V
13.7.2 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 +176 °F or +122 °F (80 °C 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. 33 Temperature influence
In the above example, T
max.
= +176 °F (+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, constant-pressure or constant-curve
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.
Selection of T
max.
In systems with a dimensioned flow-pipe temperature of:
• up to and including +131 °F (+55 °C),
select T
max.
= +122 °F (+50 °C)
• above +131 °F (+55 °C), select T
max.
= +176 °F (80 °C).
3.1.15.0.0.0 Setpoint influence
Range
4-20 mA [0-100 %]
0-10 V [0-100 %]
Control
0-20 % (e.g. 0-2 V) Setpoint = Min.
20-100 % (e.g. 2-10 V) Setpoint = Min. ↔ setpoint
Note
Note
Before the " External setpoint function " can be
enabled, the analog input must be set to
"
External setpoint influence " via the " Assist " menu.
See section 5.5.3 Analog input.
TM05 3219 1212
rpm
V
Min.
02
Max.
10
TM05 7946 1613
Note
Note
The temperature influence function cannot be
used in air-conditioning and cooling systems.
H
T [°F]
30 %
68 122 176
T [°C]
20 50 80
100 %
H
actual
T
actual
H
Q