LEVTECH LSP-SC2-WIFI User manual

SOLAR CONTROL
WiFi VERSION
LSP-SC2-WIFI
User Manual

Levtech Service & Prodtuction SRL
Short description
Features
Ÿ Temperature measurement with Pt1000 sensors
ŸHeat resistant silicon sensor cables
Ÿ Sound alarm
Ÿ Wall mountable case
Ÿ Configurable via Wifi
Ÿ E-mail notifications in case of failures
Ÿ Manually contrallable
Ÿ Algorithm preventing the pump from sticking
Ÿ Displaying of measured temperatures
The purpose of the LSP-SC2-WIFI
controller is to control a solar collector system
consisting of a solar collector and a hot water
storage tank. By comparing the collector and
tank temperatures, the device controls the
pump and assures the user that the system is
operating safely and efficiently. The controller is
configured using our smartphone or a laptop
with which we connect to the device via WiFi.
T2 T1
Pow er ON
Pump O N
Err or
WATER TANK
TEMP
COLLECTOR
TEMP
SOLAR CONTROL

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Description
Button 1 - for turning
off the sound alarm
and for testing the
pump
5A fuse for the
pump
500mA fuse for the
power supply
Display
LED
indications
Pt1000 sensor from
the collector
Pt1000 sensor from
the water tank
Pump connection
(Max 4A/220V)
Power supply
150-240V AC
Button 2 - for
activating the
Wifi and for
resetting
Button 2
Button 1

Description
The Solar Control controller is designed to control the efficient operation of
a solar collector system by controlling the pump on the closed water system of
the solar collector and the tank and by measuring the exact temperature in them.
Compared to the previous version, the innovation is the configuration from the
smartphone and the possibility to send a warning via e-mail about possible
errors. The device has two temperature measuring inputs. Both sensors are
Pt1000, one measures the temperature in the solar collector and the other in the
water tank. The controller has one output that operates the circulation pump. The
input voltage is displayed on this output, which can be 150V - 240V AC.
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Display
On the display, the displayed temperature alternates between the temperature of
the solar collector and the temperature of the tank at intervals set in the
parameter settings, which can be distinguished by the appearance of the dot.
In the case of an error, the display shows the code of the active error, which
is detailed in the error indications chapter. When connected to the device, the
error signals can be seen online with an explanation on the main page, written in
red.
Button 1
The main function of the push button is to start the pump when pressed. As
long as the button is pressed, the pump is active, when it is released it turns off. It
can be operated at any time by pressing the button, regardless of operating
mode, it can also be used to test the operation of the pump.
Another function of the button is to stop the alarm. When pressed, the sound
signal stops, only the light signal remains.
Button 2
By long pressing button number 2, we can turn on WiFi on the device, if it
has been turned off under the network settings tab.
Also, with this button, we can reset the controller, the process can be found on
the "Restore factory settings" page.
Temperature of the
water tank
(Dot)
Temperature of the
collector
(No dot)

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The controller comes ready-to-use from the factory and provides safe control of the
given system immediately after connection. In addition, personalization is possible, which
can be carried out on the device through the Wifi connection of a smartphone or a laptop.
To access the settings, use your device to find the Solar_control WiFi availability and
connect to it.
Password of the wifi: password
After a successful connection, by scanning the QR code on the device, the main
page of Solar Control opens in our browser or we enter the following IP address in the
address bar of the browser (e.g.: Chrome/Google/Safari): 192.168.4.1
If the browser has successfully opened the main page, here we can see the main
data about the system, such as the current temperatures, the state of the pump, and from
here we can choose between the group of parameters to be modified. It is possible to
change the control (Setup) and network parameters (LAN Setup). *
Also, here is the firmware version (lower right corner) and the icon for the manual
(upper right corner).
Attention! Internet access is required when trying to access the manual.
Therefore, it is necessary to disconnect from the controller and provide Internet access.
Settings
* By default, the subtitles are displayed in English. The language can be changed by following the
steps described in the chapter Changing the language.

Setup
Here we can change or set the parameters of the controller to the default position. You
must enter a password to enter.
Username: admin
Password: password
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Settings

Start Temperature: specifies the minimum temperature value of the collector from which the
control starts. The unit of measurement is degrees Celsius.
Differential Temperature: specifies how many degrees the water in the collector must be
warmer compared to the tank in order for the rotary pump to start. The unit of measurement
is degrees Celsius.
Motor Overrun Sec: we can set the pump running time after the temperatures have
equalized so that the hot water does not get stuck in the pipes. The unit is seconds.
Display Time Internal Temp Sec: the value measured by the two sensors alternates on the
display and with this parameter we can set how many seconds the temperature in the tank is
displayed. At this value, a dot appears on the display. The unit is defined in seconds.
Display Time External Temp Sec: the value measured by the two sensors alternates on
the display and with this parameter we can set how many seconds the temperature in the
solar collector is displayed. The unit is defined in seconds.
Low Temperature (Filled with antifreeze): if the temperature in the solar collector falls below
this value, the controller starts the pump to circulate the liquid to prevent freezing. This value
is taken into account if the system is loaded with antifreeze and the “Without antifreeze”
mode is not checked in the parameters.
Low Temperature Hysteresis(Filled with antifreeze): this value determines by how many
degrees the system must warm back up from the value specified in the Low temperature
parameter, in order for the freezing error signal to disappear.
Temperature Without Antifreeze (Without antifreeze): the same as the Low temperature
parameter, only in this case the system is not filled with antifreeze, because of this there is
already a risk of freezing below 0 degrees. Even with the value set here, we receive an error
message and the pump will run continuously until the specified value plus its hysteresis
value is reached.
Temperature Hysteresis Without Antifreeze (Without antifreeze): in the case that the
system is not filled with antifreeze liquid, the temperature of the Without Antifreeze mode
and its sum will be the value that, if the temperature of the solar collector is reached, the
pump will turn off.
Dangerously High Temperature: is the value that, when the temperature of the solar
collector is reached, the controller sounds an alarm and the Error LED lights up. Together
with these, the pump also comes into operation. Furthermore, if the email notification is
enabled and set, the controller will send the error signal to the specified email address. Its
unit is degrees Celsius.
Dangerously High Temperature Hysteresis: the Dangerously High Temperature and the
difference of this value gives the value where the sound signal stops, but the Error LED and
the pump still work.
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Beállítások

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Settings
Over Temperature: if the temperature of the solar collector has reached this value, the
Error LED will light up and the pump will start. The controller also sends a notification if the
notification sending function is activated.
Over Temperature Hysteresis: the value given by the Over Temperature and the
difference of this value is the point below which, when the temperature of the solar collector
drops, the controller stops the alarm and the pump.
Without antifreeze: It is activated when the system is not filled with antifreeze liquid. If it is
not checked, the system will operate on the basis of Low Temperature values and it should
be filled with antifreeze.
Holiday: this mode can be used to keep the tank temperature at 50 degrees Celsius. The
system does this in such a way that when the temperature of the solar collector drops below
18 degrees Celsius (mostly during the night), the controller starts the pump and it works
until the temperature of the tank drops below 50 degrees Celsius.
Default button: by clicking on this, we can restore the control parameters separately to the
factory state. When you press it, the system will ask if you want to execute it for sure.
Load button: by pressing it, we can read the currently loaded parameters. After saving, we
can use this to test whether the changes have been saved.
Save button: with this button we can save the changed parameters in the controller's
memory. If we changed one of the parameters, we have to press it so that the desired
values are stored. After pressing it, a window will pop up asking if you are sure you want to
save the changes.
Logut button: we can use this to return to the home screen. After clicking on it, you will be
asked to confirm whether you really want to exit the settings and save the changes.
Furthermore, when pressed, the WiFi communication of the device restarts, after which we
have to reload the page, if our phone or laptop does not load it automatically.

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Settings
LAN Settings
Here we can change or reset the network parameters of the controller. For easier
navigation, the menu is divided into 5 parts. You must enter a username and password to
log in.
Username: admin
Password: password
Wifi configurations
Here we can connect the controller to our own home Wi-Fi network, setting the appropriate
parameters. For this, we need to tick the Enable window.
We can search for our network with the Scan button, and then enter the password of our
network in the Wifi password field.
By checking DHCP, we can access the controller automatically, without entering the
following IP address and other datas.
Save with the Logout, then Save and Exit button so that the controller can function
properly. It is absolutely necessary to restart the Wi-Fi communication, which is
automatically performed by the controller.
Attention! Once the controller has been connected to our own network, it can only be
accessed via the Solar_control wifi network at the address http://solar.local.

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Settings
Access point configurations
Access Point Enable: with the help of this we can make the controller visible (checked) or
invisible (not checked) for other devices. If the device is currently invisible, you can use
Button 2 on the controller to display it in the list of Wi-Fi devices when searching.
AP SSID: here we can change the name of the device so that it appears in the list of
available devices when searching.
AP Password: we can change the connection password of our device.
IP Address: we can change the IP address of our device.
Attention!
Save the changes made here with the Logout, then Save and Exit button!
User configurations
With this menu item, we can change the username and password used to enter the two
menus on the main page, separately.