38
probes probes with range -50 ° C .. + 110 ° C can be used (probes
supplied with blue cable).
If systems with 2 solar panels are created, the probes
corresponding to S1 and S4 must be exclusively with a range of
-50 °C .. +200 °C.
The relay outputs relating to loads 1, 2, 3 and 4 are voltage free
(230V ~); the output of the auxiliary alarm relay is a voltage free
changeover contact.
It is advisable to insert a 10A 250V ~ fuse on the power supply
line of the control unit, which intervenes in the event of shortì
circuits on the loads.
TO VERIFY CORRECT OPERATION OF THE DEVICE IT IS
NECESSARY THAT THE LOADS ARE CONNECTED.
EARTH TERMINAL BLOCK:
On the base of the control unit
there is a brass terminal block to connect the earth protection
conductors of the various devices connected to the control unit.
EXAMPLE OF CONNECTION ONLY FOR CIRCULATORS
COMPLYING WITH THE ErP 2015 DIRECTIVE, WITH
EXTERNAL PWM SIGNAL
10.5 START-UP
ON AND OFF
To turn the control unit on or off, hold down the ‘esc’ button for at
least 3 seconds.
When switched on, the control unit will carry out a diagnosis of
the internal circuit to verify its correct functioning and the red LED
will emit three flashes.
If the control unit does not detect any anomalies, the red LED will
remain on, otherwise the LED will continue to flash quickly and
the type of error will be shown on the display.
BACKLIGHT
Pressing any key activates the backlighting of the display which
will turn off automatically after about 20 seconds.
ACOUSTIC SIGNALS
The control unit has an internal buzzer that allows it to emit
acoustic signals each time the keys are pressed or in the event
of an alarm or fault.
The acoustic signals can be excluded by setting the appropriate
‘Installer Parameter’.
CONNECTED LOADS TEST FUNCTION
Through this function, which can be activated from the installer
parameter
Fig. 10
in fig. 10, there is an example of the closing of the control unit
WARNING!
When closing the control unit, make sure that the
removable terminal blocks have been inserted correctly (the
screws of the terminal blocks must be facing upwards).
P7, the control unit activates the connected loads in order to
allow the installer to verify the correctness of the connections
made.
10.6 DISPLAY OF TEMPERATURE, SPEED AND ENERGY
PRODUCED
The control unit will normally show on the alphanumeric display
the temperature detected by the connected probes, the speed
(in%) of the collector pumps connected to the PWM outputs (E
and W) and the quantity of energy produced.
The speed of the EAST manifold PWM pump is shown on the
display with% EFX, while that of the WEST manifold is shown on
the display with% WFX.
The energy display will be expressed in KWh + MWh. The KWh
count, when it reaches 1000 KWh, will reset to zero and the MWh
counter will increase by 1.
The total energy produced will be given by the sum of the two
meters (for example 815 KWh + 12 MWh = 12.815 MWh).
The display of the temperatures detected and the speed of the
PWM pumps is contextual to the hydraulic diagram set in the
installer parameter P1.
By pressing the ‘
’ or ‘
’ keys, you can cyclically select the data
whose value you want to view:
S_1
S_2
S_3
S_4
%EFX
%WFX
KWh
MWh
ATTENTION
The calculation of the energy produced is carried out on thebasis
of the pumps controlled with the ON / OFF type command.
If PWM pumps are connected, the calculation remains valid, but
the value is calculated with an approximation up.
10.7 SUN / ANTIFREEZE DISPLAY
In normal operation, the ‘SUN’ icon will always be on on the
display.
When the control unit detects a condition that activates the
collector pump, the ‘SUN’ icon will flash.
When the Antifreeze function is activated, in addition to the ‘SUN’
icon, the ‘SNOW’ icon will also light up; when the control unit
detects a temperature such as to activate the antifreeze, the
‘SNOW’ icon will also flash.
AUTOMATIC OPERATION / ABC (Automatic Boiler Control)
The control unit can manage the selected system in 2 different
ways:
AUTOMATIC (Normal operation of the control unit)
In this mode the control unit automatically manages and controls
the operation of the system according to the set data.
ABC (Automatic Boiler Control)
By pressing the key ‘
L
’ it is possible to activate or deactivate the
ABC function of the control unit.
If the ‘ABC’ function is activated, the icon will light up on the
display ‘
L
’.
The conditions that cause the collector pump to activate are
indicated below EST:
S_1≥TABC+Hysteresis value
and
S_1≥S_2+ Hysteresis value
The following are the conditions that cause the collector pump
to shut down:
S_1<TABC
or
S_1<S_2
