LEVTECH LSP-SC1 User manual

Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro
SOLAR CONTROL
LSP-SC1
MANUAL
Levtech Service & Prodtuction SRL

Brief description
Features
Ÿanti-freezing function
Ÿvacation mode
Ÿsound alarm
Ÿtemperature displaying
Ÿsensor fail alarm
Ÿwall mountable case
Ÿmanual control
Ÿpump saver function
The purpose of the LSP-SC1 controller
is to control a simple solar thermal
system, which consists of a solar
collector, storage tank and a pump.
Comparing the temperatures of the
collector and of the storage tank, this
device controls the pump and makes
sure that the entire system is safe and
highly efficient. It was designed for easy
installation and usage.
WATER TANK
TEMP
COLLECTOR
TEMP
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro
T2
T1
SOLAR CONTROL
Power ON
Heat pump ON
Error
LSP-SC1

Description of the controller
Display
Indication
LED
Holiday switch
Potentiometer:
adjusts the
temperature
difference
(2-22 °C)
Potentiometer:
adjusts the delay
of the pump when
switching off
(0-20 Sec)
Potentiometer:
adjusts the starting
temperature of
controlling
(0-40 °C)
Jumper:
determins
whether the
system is filled
with antifreeze
liquid
500mA safety
fuse on the
power supply Alarm reset
and pump test
button
6A safety fuse
for the pump
WATER TANK
TEMP
COLLECTOR
TEMP
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Potentiometers:
When changing the value on the potentiometers, the controller shows the value
on its display in the corresponding unit. At its basic state, it shows the temperature
measured in the solar thermal collector and water tank.
ŸThe function of the T_OFF potentiometer is to set the delay time for the pump
switch off. This starts from the moment when the temperature is equalized, in
order to achieve that hot water flows through the storage tank heat exchanger
without having it stuck in the pipe. It can be set from 0 to 20 sec.
ŸThe Diff_Temp potentiometer sets the difference between the temperatures of
the solar thermal collector and of the water tank. When this difference reaches
the given value, then the controller switches the pump on. It can be set from 0 to
22 °C.
ŸThe Start_Temp potentiometer sets the starting temperature for controlling the
system. The temperature of the collector has to be higher then the given starting
temperature in order to start the pump, even if the difference between the
temperatures of the collector and of the water tank is high enough. It can be set
from 0 to 40 °C.
The controller has no buttons and menu to avoid changing the settings by non-
technicians/non-professional personnel. However, by removing the front cover,
the technician/professional personnel can adjust the settings with the
potentiometers and jumpers.
It has two inputs. Both are PT1000 probe, one entering the solar systems, the
other one entering the water tank. It has one output to switch the heat pump. The
controller is supplied by the grid from 150V to 240V AC.
Description of the controller
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Button
The main function of the button is to switch on the pump. Pressing the button will
turn the pump on, releasing the button will switch it off. It can be actuated anytime
regardless of the controller’s function mode. It is used to test the pump. The other
function is the alarm reset, which turns the alarm sound off.
Jumper
During winter time, if the temperature drops below the given value, the collector
turns the pump on to avoid water/antifreeze to get frozen in the system. The
function of the jumper is to set whether the system is filled with antifreeze liquid or
not.
In case the controller is set to antifreeze mode, during winter time when the
temperature of the collector reaches -20 °C, it will start the pump and will run it
until the temperature of the collector reaches -15 °C. When the antifreeze mode is
off, the pump will start at -5 °C and will switch off at 0 °C to avoid the freezing of the
water in the system.
Holiday switch
By switching the vacation mode on with the holiday switch at the bottom of the
controller, it can be ensured that the system keeps the temperature of the tank on
a certain level where the water cannot be overheated while not in use. This
happens during the night, by the pump automatically switching on when the
temperature in the water tank is higher then 40 °C and the temperature in the
collector is lower then 40 °C. The pump is running until the temperature of the
water tank cools down to 40 °C.
Description of the controller
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Alarms
If any of the sensor cables are broken, the sound alarm and the pump will be
turned on until the controller can measure the temperature again. The sound
alarm can be stopped by pushing the button on the bottom of the controller. The
alarm and the pump stops only in case the problem is solved.
The display shows the sensor which is broken.
EO– means that the collector sensor is not connected.
EC-- means that the collector sensor is short.
--EO means that the water tank sensor is not connected.
--EC means that the water tank sensor is short.
Broken sensor cable alarm
High temperature alarm
It will be triggered when the temperature in the collector reaches the 115 °C. The
pump will be stopped to avoid damage in the pipe line caused by the hot water.
The sound alarm can be switched off with the button and the pump can be
controlled manually with this button. The alarm resets when the temperature in
the collector cooled back to 105 °C.
Low temperature alarm
It will be triggered when the temperature in the collector reaches the -27 °C or -1
°C degrees depending on whether the system is set to antifreeze mode or not
with the jumper. If this alarm is on, it means that the pump is not working and the
controller couldn’t warm up the system. The sound alarm can be switched off with
the button. The alarm resets when the temperature in the collector cooled back to
-15 or 5 °C.
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

In normal working condition, the controller measures the temperature in the
collector (T1) and in the water tank (T2). If the temperature in the collector minus
the temperature in the water tank is higher than the preset value, then it turns on
the pump and runs it until the temperature of the collector (T1) is lower then T1+
half of the preset value.
For example: Preset value (T1-T2) = 10 °C
T1 = 50 °C
T2 reaches the 60 °C and the controller switches the pump on and runs it until T2
cools down to 55 °C (50 + (10/2)).
Normal mode
Holiday mode
The system automatically cools down during night time to avoid damage
caused by overheating the system.
Winter mode
The controller doesn’t let the system freeze by turning on the pump when the
temperature is below a certain level.
Pump saver function
There is a pump block avoiding algorithm built in the system,
which is tracking whether the pump has been started in the past
8 days. If it hasn’t been in use, then it starts the pump for one
minute.
Working Method
Levtech Service & Prodtuction SRL
T2
T1
SOLAR CONTROL
Power ON
Heat pump ON
Error
LSP-SC1
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

37mm
150 mm
155 mm
Dimensions
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Power supply
150-240V AC
Pump connection
(Max 4A/220V)
Pt1000 Sensor
Storage Tank
Pt1000 Sensor
Collector
Connections
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Specifications
Supply voltage
150V to 240V AC 50Hz
Current consumption of the controller
<5 mA
Ambient temperature for the controller
-20 °C to 60 °C
Dimensions (W x H x D)
155 x 150 x 37 mm
Weight
65g
Display
3digit 7 segment display
Maximum load of the pump
4A
Sensor inputs
Pt1000
Measuring range
-50 °C to 180 °C
Temperature control accuracy
+/- 0.5 °C
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Default settings
Antifreeze jumper
OFF (Without antifreeze)
Holiday switch
OFF
Holiday mode
Keeping temperature of the tank
below 40 °C degrees
High temperature alarm
115 °C in collector
High temperature alarm automatic off
105 °C in collector
Antifreeze mode
Pump starts at -20 °C degrees
Pump switches off at -15 °C degrees
None antifreeze mode
Pump starts at -5 °C degrees
Pump switches off at 0 °C degrees
Pump delay potmeter
5 sec
Temperature difference potmeter
6 °C degrees
Controlling start temperature
potmeter
30 °C degrees
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

Attention
Before starting to work on the power source
(cable connection, installation of equipment,
etc.), make sure that the equipment is
disconnected from the main source of energy.
All connection links must be done by a
qualified electrician. Before activating the
controller, measure pump reset efficiency and
inspect insulation of wires!
The device may be damaged if struck by
lightning!
Make sure it is switched off during storms!
Electrical and electronic appliances often
contain materials which, if handled or
disposed of incorrectly, could be potentially
hazardous to human health and to the
environment. They are, however, essential for
the correct functioning of your appliance.
Therefore, please do not dispose of it with
your household waste. Please dispose of it at
y o u r l o c a l c o m m u n i t y w a s t e
collection/recycling centre, and ensure that it
presents no danger to children while being
stored for disposal.
Levtech Service & Prodtuction SRL
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro

INSTALLATION INSTRUCTIONS
Remove the front cover of the controller and
mount the enclosure on the wall with two screws.
Try to find a place near to the water tank.
Put the collector sensor into the collector
temperature measuring hole. Extend the
sensor cable with 0.2 mm cable if it
doesn’t reach the collector.
1
3
Put the water tank sensor inside the water
tank temperature measuring hole.
2
220 AC
T2
T2
Connect the pump to the collector.
4
Connect the power source by plugging
in the collector.
5
Done.
6
T1
T1
T2
T1
SOLAR CONTROL
Power ON
Heat pump ON
Error
LSP-SC1
INSTALLATION INSTRUCTIONS
Remove the front cover of the controller and
mount the enclosure on the wall with two screws.
Try to find a place near to the water tank.
Put the collector sensor into the collector
temperature measuring hole. Extend the
sensor cable with 0.2 mm cable if it
doesn’t reach the collector.
1
3
Put the water tank sensor inside the water
tank temperature measuring hole.
2
220 AC
T2
T2
Connect the pump to the collector.
4
Connect the power source by plugging
in the collector.
5
Done.
6
T1
T1
T2
T1
SOLAR CONTROL
Power ON
Heat pump ON
Error
LSP-SC1

1
3
2
4
5
6
CONFIGURATION INSTRUCTIONS
If the system is filled with antifreeze then
put the jumper on the upper 2 pins. If
there isn’t antifreeze filled in the
systems, then keep the default settings.
Using a screwdriver, set the delay time of
the pump switch off by turning the
potentiometer on the left.
Using a screwdriver, set the temperature
difference by turning the potentiometer in
the middle.
Turn the potentiometer on the right with a
scre w d r i v e r t o s e t the minimum
temperature collector.
Place back the front cover.
Test whether the pump is starting by
pressing the button.