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.

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Settings
Email configurations
Here we have the option to set the parameters for sending email notifications. If you simply
want to receive a notification, enter the email address where you want to receive the
notification in the Destination email address field. Then we need to check both boxes:
Default SMTP and Notifications enable. Finally, save your changes with the Save button
at the bottom of the page.
Other changes to this menu item are only necessary in special cases.
E-mail notifications only work if the device is connected to our internal network
based on the instructions described under the Wifi configurations menu item!
If you have set the email sending parameters correctly, you can check them with the Test
email button.
Language
Default button: by clicking this, you can reset the language of the user interface to the
default. By default, the menu is in English (EN).

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Changing the language
The controller menu is available in three languages:
ŸEnglish
ŸHungarian
ŸRomanian
By default, the menu is displayed in English and you can easily change it by following the
steps below.
Step 1
Find and connect to the Wi-Fi network of the
controller - Solar_control
The password is: password
Step 2
Scan the QR code at the bottom of the
product or type the IP address "192.168.4.1"
into your browser (Chrome/Google/Safari).
Step 3
Enter the LAN Setup menu
Username: admin
Password: password
Step 4
You can select the language under the
Language menu item, which you can save
with the Save button. In the same place, we
can reset the language with the Default
button.
After making a change, if the language is not
updated, reload the page.

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If you want to restore the factory settings, you can easily do it by following the steps
below. After the reset, the parameters of the control and the network settings are also
reset to the factory values. You can find these values in the Default settings chapter.
The controller can be restored to its factory state by following these steps:
Factory reset
Step 1
Turn off the device. Simply unplug the power cord. Confirm that the device is not working
by checking the status of the Power ON LED. If it is not lit, the device has been properly
switched off.
Step 2
Press and hold the AP button (Button 2). While the button is pressed, reconnect the
device's plug to the mains socket.
Step 3
After connecting, keep the button pressed for 5 seconds. Then a zero flashes on the
display and a segment starts rotating on the display, as shown in the figure below. After
the flashing ends, the current temperature value is displayed. When you see this, you can
release the button. After that, the current temperature values will be read again on the
display, alternately.
1
3
2
Pow er ON
Pump O N
Err or
WATER TANK
TEMP
COLLECTOR
TEMP
SOLAR CONTROL
Power ON
Pump ON
Error
WATER TANK
TEMP
COLLECTOR
TEMP
SOLAR CONTROL
Power ON
Pump ON
Error
WATER TANK
TEMP
COLLECTOR
TEMP
SOLAR CONTROL
Release the
button

Alarms
If any sensor wire is broken, the buzzer will sound and the pump will start
until the controller receives a readable value from the sensor again. The sound
signal can be turned off by pressing Button 1 on the bottom of the controller. After
the beep stops, the pump continues to operate until the problem is resolved.
The display indicates which sensor has a problem and what the error is.
These can also appear in combination.
EO-- the sensor of the water tank is not connected (open loop)
ES-- the sensor of the water tank is shorted
E--O the sensor of the collector is not connected (open loop)
E --S the sensor of the collector is shorted
Sensor failure alarm
Overheat alarm (by default)
Once the solar collector temperature exceeds the Over Temperature of
105°C, the Error LED will light up and the pump will start. They remain on until
the temperature drops below 100°C.
If the temperature exceeds the Dangerously High Temperature, 115°C,
the light signal and the sound signal will be active in addition to the pump
operation.
The alarms are also displayed in detail if you are connected to the Wi-Fi
user interface of the controller.
If the email notification sending function is activated, the controller will
also send the error message to the specified email address.
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Operation
Under normal conditions, the controller measures the temperature in the solar collector
(T1) and the water tank (T2). If the temperature difference between the solar collector and the
tank is greater than the preset value, the pump starts and runs until the temperature in the solar
collector (T1) is less than T1+ half of the set value.
Example:
Temperature difference = 10 degrees (difference between T1 and T2)
T1 => reaches 60°C and T2 = 50°C
The controller starts the pump and runs it until T1 cools below 55°C (50 + (10 / 2)).
Normal mode
Without antifreeze mode
The controller starts the pump at the Temperature Without Antifreeze of 4°C, thus
preventing freezing. If the temperature in the solar collector exceeds 5°C, the controller will
return to normal mode. Antifreeze mode is enabled by default, so if your system is loaded
with antifreeze, uncheck the box.
Pump protection
If the pump has not been in operation for 8 days, the controller will start it and run it
for 3 minutes.
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T2 T1
Pow er ON
Pump O N
Err or
WATER TANK
TEMP
COLLECTOR
TEMP
SOLAR CONTROL
This mode can be used to keep the tank temperature at 50 degrees Celsius. It does
this so that when the temperature of the solar collector drops below 18 degrees Celsius
during the night, the controller starts the pump and runs until the temperature of the tank
drops below 50 degrees Celsius.
Holiday mode

Dimensions
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67.57 mm
129.92 mm
92.84 mm
141.64 mm
36.79 mm

Connectors
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Pt1000 sensor
from the water
tank
Pt1000 sensor
from the solar
collector
Pump
connector
(Max 4A/220V)
Power
supply150-
240V AC
By default, the two temperature sensors and the power cable are
connected to the controller. Before use, it is only necessary to connect the
motor wires properly. If the wires of one of the sensors need to be extended, it
is justified to dismantle, splice and reassemble them. The sensors can be
extended to a length of up to 300 m without affecting the accuracy of the
measurement.
The polarity of the Pt1000 sensors does not matter, their conductors are
interchangeable.
A 3-polarity connector is available for connecting the pump. This means that a
three-conductor pump can be connected using protective earth (G), neutral (N)
and phase (M).
The power supply is also connected based on the picture. Based on the image,
the phase (L) is at the bottom, neutral (N) is above it, and the protective ground
(G) is above it.

Technical data
Power supply
150 - 240V AC 50Hz
Consumption
1W
Controller operating temperature
-20 °C to 60 °C
Dimensions (H x L x W)
147 x 96 x 38 mm
Weight
185g (515g with accessories)
Display
3-character 7-segment display
The pump max. current consumption
4A
Type of sensors
Pt1000 / Pt1000
Sensor wire length
3m / 3m
Measuring range
-50 °C to 180 °C
Temperature setting accuracy
+/- 0.5 °C
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Holiday mode
Off
Without antifreeze
On
Dangerously high temperature alarm
with sound
115 °C in the collector
Over temperature
105 °C in the collector
Antifreeze operating mode
Pump starts at -20 °C and stops at -
15 °C
Fagyásgátló nélküli mód
Pump starts at 4°C and stops at 5°C
Pump shutdown delay
0 sec
Temperature difference
2°C
Starting temperature
40°C
Access point
Enable
IP address
192.168.4.1
SSID
Solar_control
Password
password
Default settings
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Attention!
Before starting any work on the supply (wiring,
installation of equipment, etc.), make sure that
the device is not connected to the electrical
network. The connections must be made by a
qualified electrician. Before using the controller,
check the connections and check the insulation
of the wires!
In the event of a lightning strike, the device
may be destroyed!
Make sure that the device is not connected to
the network during a storm!
We are committed to protecting the environment.
The production of electronic devices requires the
safe disposal of used parts and electronic devices
for the sake of environmental safety. The
recycling of waste helps to protect the
environment. The user is obliged to return the
used equipment to a collection point, where all
electrical and electronic components are
recycled.
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