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en - Original instructions
This function alters the speed of the pump in order
to maintain a constant temperature of the pumped
media.
For details, refer to the advanced functions manual
on www.lowara.com
5.2.5 ∆T constant (available only on
ecocirc XLplus)
This function alters the speed of the pump in order
to maintain a constant differential temperature of the
pumped media.
For details, refer to the advanced functions manual
on www.lowara.com
5.2.6 External start/stop
The pump can be started or stopped via an external
potential-free contact or a relay that is connected to
terminal 11 and 12. See
Figure 18
The pump unit is provided by default, with the termi-
nals 11 and 12 short-circuited.
NOTICE:
• The pump provides 5 VDC through the start /
stop terminals.
• No external voltage must be provided to start /
stop terminals.
• The cables connected to terminals 11 and 12,
shall not exceed 20 m.
5.2.7
5.2.8 Analog Input
The pump integrates a 0-10 V analog input at termi-
nals 7 and 8. See
Figure 18
changing the set point.
When a voltage input is detected, the pump switch
to fix speed control mode automatically and start to
work according to the following diagram:
Speed
[rpm]
Max
Setpoint
min
1,2
1,5
Vset
5.2.9 Signal relay
17
Not available on 25-40, 25-60, 32-40, 32-60 models.
24
and
Figure 19
.
and
Figure 19
for
10
Vin[V]
The pump is equipped with a relay, terminals 4 and
5. See
Figure 18
and
Figure 19
fault signal. If there is a fault the relay is activated to-
gether with the red status light and the error code on
the user interface display,
Ratings
• Vmax < 250 VAC
• Imax < 2 A
5.2.10 External sensors
The pump can be equipped with a differential pres-
sure sensor and a temperature probe according to
the following table:
Sensor de-
Type
scription
Differential pres-
1.0 bar (PN 10)
sure sensor
2.0 bar (PN 10)
4-20mA
External tem-
KTY83
perature sensor
Pressure sensor setup
1. Install the pressure sensor on the pipe
2. Connect the cable at terminals 9 and 10 (see
section 4.6.3).
3. Power on the pump unit.
4. During startup the pump unit detects the sensor
and shows a setup menu.
5. Select the right sensor model and confirm the
selection using the parameter button (3). See
Figure 13
.
6. The pump will complete the startup sequence
and automatically start working with constant
pressure mode.
7. The setpoint can be changed using the setting
buttons (5). See
Figure 13
External temperature sensor setup (only for eco-
circ XLplus)
The setup of the sensor and control modes related
to it, is available only through communication bus.
For details refer to communication and advanced
functions manuals on www.lowara.com
NOTICE:
The sensor cables shall not exceed 20 m.
5.2.11 Communication bus (available only
on ecocirc XLplus)
The pump has two built-in RS-485 communication
channels. One is available as standard (terminals
15-16-17), while the second one is enabled only with
optional RS-485 or Wireless module (terminals
18-19-20). See
Figure 18
The pump can communicate with external BMS sys-
tems via Modbus or BACnet
plete description of the protocols, refer to the com-
munication manual at www.lowara.com.
NOTICE:
When remote control is active, the set points and
control modes are managed only through communi-
, for a potential-free
Figure 13
.
Terminals
9 - 10
13 - 14
.
and
Figure 19
.
17
protocol. For a com-
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