8
INSTALLATION
INSTALLATION
F
Ps
Pa
Is
Ia
CN3
CN4
CN6
3
2
1
4 5 6
Ua
Us
Sensor connections
− Route probe cables through the cable guides (F), the fair-
leads (Ps), the passages on the insulation (Is), the solar
station outlets (Us/Ua) and connect them to terminal
board M4 of solar regulator (terminals S1-S2-S3-S4) mak-
ing reference to the instructions provided in the specific
regulator manual.
Upon connection, or should it be necessary to increase probe
cable length, refer to these remarks:
− Absolutely avoid laying probe cable together with mains
power cables and/or AC cables
− Absolutely avoid routing cables close to strong magnetic
fields
− Avoid any cable jointing as much as possible; solder and
duly insulate any indispensable jointing
− Use twisted and shielded wires
− Use cables having a cross-section of over 0.5 mm
2
Solar controller power connections
− Route the supply cable through the cable guides (F), the
fairleads (Pa), the passages on the insulation (Ia), the so-
lar station outlets (Ua) and connect it to terminal board
M1 of solar regulator (terminals L-N-GND) making refer-
ence to the instructions provided in the specific regulator
manual.
Once electrical connections are completed, fasten cables using
the guides supplied, close regulator cover and solar station pro-
tection housing.
Version without solar regulator (MR)
The circulator supplied with version MR needs a PWM signal con-
trol with the characteristics below.
REG
MO
230~
CONTROL
PUMP
AE 230V ~ 50Hz
C
N
GND
PWM
L
PE
L
N
PE
AE
Power supply (connections to be made by the
installer)
REG
Generic solar regulator
C
Circulator with PWM control
MO
Terminal strip
MO
230~
CONTROL
PUMP
AE
230V ~ 50Hz
C
N
GND
PWM
L
PE
L
N
PE
EVOSOL
AE
Power supply (connections to be made by the
installer)
EVOSOL
EVOSOL solar regulator
C
Circulator with PWM control
MO
Terminal strip
In the version without solar regulator, connections for circula-
tor PWM signal and power supply (solar regulator side) shall be
made by Installer.
Circulator operation depends on the presence of a solar regula-
tor allowing for PWM control. Check compatibility of the chosen
regulator with the PWM signal characteristics (refer to paragraph
"Control Signals" below).
CONTROL SIGNALS
The circulator must be controlled via a PWM (pulse width modu-
lation) low-voltage digital signal. The speed changes according
to the input signal, as indicated in paragraph "PWM input sig-
nal".
Here below are the main characteristics required of the PWM
signal output by the associated solar regulator.
9
Check the characteristics of your solar regulator PWM sig-
nal to ensure they comply with the features below. Different
signals could irreversibly damage the circulator on-board
electronics.
PWM low-voltage digital signal
The PWM square wave signal was designed for a frequency in-
terval between 100 and 4000 Hz. The PWM signal is used to set
circulator speed.