Biokaitra BIO 20 User manual

/Translation from the Lithuanian language/
BIO 20
STEEL PELLET BOILER WITH BURNER AND AUTOMATIC
FUEL FEEDER
BIO 20 (POWER - 20kW)
CONTROLLER ST-560
BOILER PASS, USER MANUAL, INSTALLATION, USAGE
AND MAINTENANCE

1. Introduction
UAB “Biokaitra” says thank you and congratulates you with your new purchase –the heating device. Your
purchased multifunctional boiler is fired with straw, wood sawdust and other agro-pellets.
The modern construction and the most advanced methods of steel manufacturing have allowed us to create a
cheap heat energy source for your home, commercial or agricultural buildings with the area of up to 240 m2.
While designing the Bio series boilers, we focused on satisfying your needs and paid attention to long term
observations and customer feedback. This allowed us to manufacture an easy-to-use boiler with the
efficiency ratio of 91.5 %.
Recommendations
Before use
-Please check the device and its contents.
-Please read the safe operation manual carefully.
- Before installation, it is necessary to familiarise with the boiler installation section carefully.
NOTES!
- During the transportation of boiler, it is necessary to take care of the protection of boiler and its
components from mechanical damage.
- Before installation the boiler has to be stored in a dry place.
- For connection of boiler to the power network, water supply system and chimney please refer to the valid
norms, requirements and the user manual.
- The manufacturer is not liable for any losses resulting from improper installation of the device.
- In case of emergency, it is necessary to contact the authorised service as soon as possible.
- Intervention of persons without an adequate qualification may result in the damage to the boiler.
- Use only genuine spare parts for the repair works.
- The boiler and the bunker frame are subject to 3 year warranty, provided that the annual inspection of
boiler is performed and the respective information is recorded in the warranty sheet. A warranty of one year
is provided to the moving parts that are subject to wearing, i.e. screw conveyor, motoreducers and motor,
ventilator, controller and insulation rope. The warranty does not apply to the boiler deflector!
- A warranty sheet and warranty conditions are enclosed to this manual.
Purpose of boiler with burner
-Bio boilers with automatic fuel feeder and burner are used for the combustion of straw, wood sawdust and
other agro-pellets of the diameter of 6-10 mm.
-Bio boilers are modern water heating boilers used for the production of heat and hot water (with bulk
household water heaters - boilers) used for heating residential and industrial buildings.
-Bio boilers are fitted with an automatic screw fuel feeder (conveyor), burner and fuel tank to store fuel for
several days upfront (3-7 days). Boiler’s screw fuel feeder, ventilator and circulatory pump are controlled by
modern automation. Fuel control system allows to program the combustion process according to the
maintenance conditions, weather and fuel quality.
-Bio boilers do not require constant combustion, because the fuel is dosed by the automatic screw conveyor,
whereas the burning takes place thanks to the ceramic heating element.
1

Suitable fuel
Main fuel
Straw pellets / wood sawdust pellets / sunflower husk pellets / peat pellets
Diameter of pellets: 6 - 10mm, length: diameter x4.
Calorific value 15 -18MJ
Moisture content: up to 12%
Ash content: up to 6%
Dust: up to 2% of the fuel mass
IMPORTANT! The boiler may only be used in a closed heating system with the expansion vessel.
Boiler specifications
1. Boiler construction
Boiler Bio is made of high-quality certified steel. The frame is made of the galvanised tip coated with a layer of
powder paint.
2. Composition
All boilers of Bio series made by Biokaitra consist of two individual active parts. The front part of frame is
occupied by the fire chamber, whereas the top and back parts of boiler frame contain a heat exchanger with the
water contour passing to the flue. The front part of boiler contains two doors: the upper - for burner and burning
chambers for visual inspection, the lower - bottom - for the removal of ashes. The opening on the top of boiler is
planned for the cleaning of heat exchanger which is hidden under the finishing.
3. Combustion
In Bio boilers, the burning takes place in the burner to which the fuel is fed with the screw conveyor connecting
the fuel tank with burner. The fuel is loaded through the tank hatch with a lock.
IMPORTANT! When the boiler is operating, the tank should always be tightly closed.
Afterwards, the fuel is fed to the burner via screw conveyor powered by electric motor connected with
motoreducers. In the burner, the fuel is pushed to the top to form the hump. The burning takes place in the upper
part of the burner when the ventilator blows the air to the burner. The air passes to the heated pellets through the
burner channels via the ceramic heating elements and causes burning. From the burner the ashes fall
spontaneously to the box of ashes located at the bottom of boiler combustion chamber.
4. Water supply
The water is supplied to the boiler through the external screw connections G 1 ¼ “, the forced water discharge is
performed with ½” outlet located in the back bottom part of the boiler.
5. Boiler flue
Flue socket of 150mm is installed in the back part of the boiler.
6. Protection against overheating
If the temperature in the boiler reaches 95°C, the emergency thermostat is activated, the fuel feed is
deactivated as well as air ventilator and the sound alarm is activated. The unblocking of the emergency
thermostat is performed manually –it is necessary to open the cap and to press the button under the cap.
Unblocking is possible when the water temperature in the boiler drops below 60°C. In case of unblocking of
the emergency thermostat, no sound alarm will be heard. When the boiler starts to operate again, it is
necessary to find out the reason of activation of emergency thermostat by continuing to monitor the work of
the device.
2

The main boiler dimensions and technical characteristics
Boiler model
BIO 20
Boiler type
Automated central heating boiler
Power adjustment range, kW
6 - 20
Nominal power, kW (when burning pellets with the calorific value
of 4.2 kWh/kg)
20
Efficiency ratio working on nominal power, %
91.5
Exhaust fumes temperature °C
60 - 150
Heating area, m2
60 - 200
Used fuel
Automated fuel feed: 6 - 10 mm straw, wood
and other agro-pellets
Chimney connection opening, mm
ø 150
Fuel costs kg/h (Q min –Qn), when heating pellets of the calorific
value of 4.2 kWh/kg
1.5 –5.5
Maximum working water pressure in a boiler
2 bar
Water volume in a boiler, l
63
Minimum boiler return water temperature during the operation, °C
60
Maximum permissible operating water temperature, °C
85
El. power, 230V/50Hz no more than, W
350
Maximum draught in the fire, Pa
25
Overall dimensions with
fuel tank, mm
Height
1350
Width
1150
Depth
980
Fuel tank capacity, l
220
Boiler’s weight, kg
380
3

Bio boiler profile
4
INSULATION MATERIAL
CONTROL DESK
DEFLECTOR
INSULATION MATERIAL
BURNER
WATER CONTOUR
FLUE
BOX OF ASHES

Burner profile
20kW
Content
- boiler frame;
- fuel tank;
- fuel transporter with burner, fan, motoreducers and electric motor;
- boiler controller (automation);
- boiler pass, user manual and warranty sheets.
Boiler installation
-Boiler installation works must be performed by the authorised persons having the respective qualifications.
-It is necessary to prepare a project of the boiler-house where the boiler is to be installed according to the
effective laws and requirements in the Republic of Lithuania.
-The boiler must be installed pursuant to the effective requirements. The manufacturer assumes the liability
for direct and indirect losses that emerged in case of improper installation of the boiler.
Selection of boiler power
-Properly selected size of boiler, i.e. its thermal power, conditions the efficiency and effectiveness of the
boiler.
-The boiler shall be selected so that its heating power would meet the thermal losses of the object.
Boiler installation place
-The boiler shall be installed in a place the conditions of which meet the effective requirements.
-The smallest distance of the boiler contour from the walls is 300 mm. It is also necessary to leave a safe
distance from combustible materials, electricity and gas pipeline.
-It is recommended to store the boiler on a ground of non-combustible materials which is by 100 mm wider
than the contours of the boiler and 300 mm wider than the front part of the boiler. The height of the
foundation shall be approx. 100 mm.
IMPORTANT! The boiler-house shall be fitted with a gravitational ventilation and it is necessary to
ensure the passing of sufficient fresh air to the room of the boiler house to meet the costs of the certain
boiler, in view of its power. This pre-condition is necessary to ensure proper use of boiler and
security.
5
Burner
Fan
Electric motor
Burner frame
Screw conveyor

Installation of boiler
-The boiler can be fitted only in the premises the conditions of which meet the requirements applicable to the
boiler houses.
-The outlets of the supplied and return water have an external screw G 1 ½“.
-The power supply of the heating network must be connected to the nozzle which is in the back upper part of
the boiler frame. The return of water from the network must be connected to the outlet that is located in the
back bottom part of boiler frame.
-The system must be fitted with the protective valve (diameter ½), which does not allow to exceed the
operating pressure more than 0.2 MPa (2.0 kgf/cm2) in the heating system. The operation of valve must be
periodically checked by turning the handle of the valve. The protective valve must be fitted on the piping of
the fed hot water.
Place of installation of the protective valve (example)
Heating
-In order to extend the service time of boiler Bio, it is recommended to keep a temperature of at least 65°C.
-The return temperature to boiler shall be at least 60oCin order to avoid condensation process and resin
liquefaction in the combustion chamber. This would allow to extend the period of use of boiler and to
improve its effectiveness.
-For proper adjustment of properly fed and return temperature, it is recommended to use 4-way manual or
electrified mixing valve with a gear.
-In order to ensure the highest efficiency, it is recommended to use the mixing valves in the heating system
as well.
-Clean soft water is recommended to be used for the heating medium. It is best to use special filters for the
preparation of water.
-Maximum permissible height of water pillar cannot exceed 20 m.
Connection to the flue
-The boilers in the central heating system should be connected into a separate flue channel.
-The works of connection to the flue must be performed by the persons with respective qualifications
according to the valid requirements.
-The flue section is selected according to the capacity of the boiler. It ensures effective and economic
performance of the boiler.
-It is recommended to install traction regulator valve in the flue.
Installation of boiler with equipment
The boiler is delivered in separate parts, i.e. the boiler, fuel transporter with burner, motoreducers and electric
engine, fuel tank, ventilator, fuel control automation.
6
Protective valve
Fed hot water from
boiler

Boiler assembly procedure
-Fuel transporter frame with burner is placed inside the boiler and fitted with screws to the boiler frame (the
place of connection of fuel transporter frame flange with boiler frame should be hermetic.
-Fuel tank is placed on and attached to the external fuel transporter frame flange part (the rubber insert is
placed between the flanges).
-Fuel control automation is connected together with the emergency thermostat (emergency thermostat
capillary is placed into a tube on the upper part of the boiler under the finish).
ATTENTION!!! All flange connections should be tightened and their tightness should be checked.
ATTENTION!!! The works of boiler automation equipment can be performed by an installer who has
a respective qualification. Complete information about the settings of automation equipment is
provided in Section 2 of this Manual (description of the controller).
Connection to the power network
For correct connection of boiler, it is necessary to plan and to install two electricity sockets to the boiler installation
place with earthing. Ventilator, automation equipment and fuel transporter engine with the entire boiler electric
equipment should be connected to an orderly power network that meets all the valid requirements. Electric socket with
earthing should be fitted in the same distance from the boiler so that in case of need it would be possible to disconnect
the boiler from the power network.
7

I. Description of the device
ST-560 controller is used for boilers fired with CH pellets with a feeder and ventilator. Due to the advantageous
software, the controller performs many diverse functions:
 Controls the burner
 Controls the feeder
 Controls air supply ventilator
 Controls central heating pump –CH
 Smoothly controls the mixing valve
 Controls two additional valves (optionally by using additional module)
 Adjusts DHW pump
 Adjusts additional pump (additional pump: CH, DHW, circulator pump or base pump)
 Floor heating
 Weekly control
 Interaction of two operation status regulators as well as controller that ensures RS communication.
 Possibility to connect ST-65 GSM module allowing the user to adjust certain functions of the controller
by mobile phone
 Possibility to connect ST-505 Ethernet module allowing the user to monitor and regulate certain controller
functions by internet
 Possibility to connect two additional control modules (e.g.: ST-61 or ST-431N) –it helps to adjust two
additional valves.
II. Installation
The controller must be installed by a qualified specialist.
WARNING
The risk of electric shock in case of touching the powered connections. Before working with a controller, make
sure to disconnect the power supply and avoid its disconnection.
III. How to use the controller?
Phases of use
The user shall configure special CH boiler operation phases. Ignition and extinguishing –the multi-stage process
as described below. In case of proper ignition process, the controller is set at the operating or modulation mode –
subject to the usage algorithm chosen by the user –Fitter’s menu / Operation algorithm select.
Ignition
The ignition procedure may be different subject to the chosen operation algorithm. This stage is activated by the
user in the main menu.
In case of selection of the ignition function, the following message is shown on the monitor: “Is there
sufficient fuel on the grating?”. The user confirms by moving to a next stage. In case of lack of fuel, the monitor
shows the command to fill the fuel manually in order to activate the feeder.
During the next stage, the controller turns on the heater and the fan –they remain turned on until the
increase in the temperature of flue gas.
Then they move to the next stage –deferral of ignition when the heater is turned off and the fan
functions for a pre-determined period of time (default parameter: 20 min.).
Next, the controller is set to the operation mode. If the controller cannot determine that flue gases
increased after 10 min., the heater is turned off and the fan functions for 5 min. only. It is then possible to
perform the next test - the heater was active on for 10 min.
8

The fan operates for 5 min. The controller will try to ignite the boiler 3 times. In case of failure to start the boiler in all
attempts (the controller does not determine the flue gas temperature increase), the monitor shows the report of failure
to ignite.
Algorithm of the entire modulation operation
In case of successful ignition, the controller is set to the modulation mode. It consists of five stages subject to the
operating temperature.
The following modulation stages are set one after another: 100%, 80%, 60%, 40% and 30% (the user sets the
specific parameters). The transfer from one stage to another is related to CH boiler temperature difference and pre-
determined value as stipulated below:
A- Pre-set temperature interval 100%
B- Pre-set temperature interval 80%
C- Pre-set temperature interval 60%
D- Pre-set temperature interval 40%
When the pre-set temperature is reached, the controller functions according to the 30% modulation of the stopping
mode parameter.
The user defines the operation duration, the feeder activation frequency and the blowing force for the
specific modulation stage (“Modulation settings” main menu).
In case of selection of 100%, 80%, 60% and 40% modulation, the user also configures “Range form set temp.”. The
parameter used to define the value when the controller moves to another modulation stage.
For example:
Pre-set CH boiler temperature: 60⁰C;
temperature setting interval 100%: 30⁰C;
temperature setting interval 80%: 25⁰C;
temperature setting interval 60%: 15⁰C;
temperature setting interval 40%: 10⁰C
Result: in case of successful ignition of boiler, the controller moves to the next modulation stages, when the CH
boiler temperature increases:
 CH boiler temperature 30⁰C –transfer to 80% stage
 CH boiler temperature 35⁰C –transfer to 60% stage
 CH boiler temperature 45⁰C –transfer to 40% stage
 CH boiler temperature 50⁰C –transfer to 30% stage
9

When the pre-set temperature is reached, the controller functions according to the 30% modulation of the stopping
mode parameter.
Operation algorithm modulation 100%, 80%, 60%, 40%, 30%
If the user selects specific CH boiler usage modulation parameters in the menu, the CH boiler operates according to
the parameters of the set modulation stage (feeding time, feeding pause, blowing force) and in case of achievement
of the pre-set temperature, according to the parameters of each modulation stage (support mode, number of cycles
on the support mode, fan support mode).
Extinguishing
Extinguishing procedure does not depend on the selected functioning algorithm. This stage is activated by the user
in the controller’s main menu. When the extinguishing is activated, the heater and the fan are deactivated.
IV. Controller’s functions – Main Menu
Due to various functions performed by the controller, the menu is classified into the main menu and maintenance
menu. The main menu provides the basic options such as operation parameters, weekly control parameters, etc.
Main menu flow chart
• Main menu
• Ignition
• Filled fuel tank
• Temperature parameters
• Pre-set CH boiler temperature:
• CH boiler hysteresis
• Pre-set DHW temperature
• DHW hysteresis
• Pump starting temperature
• Manual ignition
• Modulation settings
• Modulation 30%
• Modulation 40%
• Modulation 60%
• Modulation 80%
• Modulation 100%
• Selection of fuel
• Straw pellets 1
• Straw pellets 2
• Wood pellets
• Manual mode
• Burner
• Blower
• Blower force
• Feeder
• CH pump
• DHW pump
• Auxiliary contact
• Installed valve 1
• Installed valve 2
• Weekly control
• Weekly control of CH boiler
• Weekly control of DHW boiler
• Operation modes
10

• Domestic heating
• Water tank priority
• Parallel pumps
• Summer mode
• Floor heating
• Disinfection
• Screen settings
• Screen view
• Screen brightness
• Screen blinking
• Blinking time
• Software updates
• Metalworker’s menu
• Maintenance menu
• Language
• Software version
• Factory settings
V.a) Ignition
The selection of this option starts the ignition process. Other stages are described in Section IV.
V.b) Filled fuel tank
This function is applied when the fuel tank is fully filled to restore 100% fuel consumption percentage (the value is
shown on the right corner of the main screen below the stopwatch).
NOTE. Before using this function for the first time, it is necessary to calibrate the fuel feeder “Fitter’s
menu/Calibration”
V.c) Temperature parameters
Press the “Temperature settings” icon to pre-set CH boiler and DHW tank temperature and hysteresis.
V.c.1) Pre-set CH boiler temperature:
This option is used to pre-set CH boiler temperature. The setting interval reaches 65OC to 80OC (factory setting –CH
boiler manufacturer can change the settings interval).
V.c.2) CH boiler hysteresis
This option is used to set the pre-determined CH temperature hysteresis. It is a difference of temperatures of support
mode entry and restoration maintenance mode (e.g. when the pre-determined temperature reaches 65ºC, hysteresis –
3ºC, because the support mode is entered under 60oC temperature when the operation mode return procedure is
performed under 62ºC).
V.c.3) Pre-set DHW temperature
This function is used to pre-set water temperature. When the water in DHW tank reaches the pre-set temperature, the
controller disconnects the DHW pump. It is activated when the temperature drops below the pre-set DHW hysteresis
value (DHW sensor reading).
V.c.4) DHW hysteresis
This option is used to set the hysteresis of pre-set water tank temperature.
It is a maximum difference between the pre-set temperature (desired DHW tank temperature) and operation
restoration temperature.
11

E. g.: if the pre-set temperature reaches 55°C and the hysteresis value is 5°C, DHW pump is deactivated, when the
pre-set temperature of 55oC is reached and activated again when the temperature drops down to 50oC.
V.c.5) Pump starting temperature
This option is used to define CH pump and DHW pump starting temperature (the temperature is measured in the CH
boiler). When the temperature is lower, both pumps are inactive, when this temperature is higher, the pumps are
turned on and operate according to the selected operation mode (see Pump operation mode).
V.d) Manual ignition
This function should be activated when CH boiler is used without fuel feed. When this mode is set, the feeder is
deactivated and ventilator operates according to the parameters set in the maintenance menu. This function is
planned for the firewood mode for 30kW and 50kW boilers.
V.e) Modulation settings
Press this icon to configure the CH boiler operation parameters of specific modulation stage. The parameters should
be configured at the same stage (except for Range from set temp. parameter which is not applied when the
modulation reaches 30%).
V.e.1) Feeding time
This parameter defines the feeder operation time having selected the specific modulation stage.
V.e.2) Temporary suspension of feed
This parameter defines the duration of temporary stopping of feeder when a specific modulation stage is performed.
V.e.3) Blower force
This parameter defines the force of the fan at the specific modulation stage.
V.e.5) Pre-set temperature interval
Note
This parameter does not apply in case of 30% modulation.
This parameter defines the time of passing to the next modulation stage (applied for CH boiler operation according to
the entire modulation algorithm). When CH boiler temperature reaches the pre-set value minus the pre-set
temperature interval value, the controller switches to the next modulation stage.
V.e.6) Support mode
This parameter defines the feeder operation time on the support mode (i.e. when the pre-set temperature was
reached).
V.e.7) Number of support mode cycles
This parameter defines the feeder actuation mode on the support mode. It is connected when the pre-set number of
fan operation cycles is reached. The number of cycles is set by the user.
V.e.8) Fan support mode
This auxiliary mode is used to set the operating parameters of the fan on the support mode: duration of operation,
duration of temporary stopping and blowing power.
12

V.f) Selection of fuel
This option is used to select one of the following types of fuel: straw pellets 1, straw pellets 2 or wood pellets.
V.g) Manual mode
The manual mode function is planned in the controller for more convenient operation of the device. Irrespective of
other devices, this function can be used to activate and deactivate each operated device. It is easy to check if the
device functions properly, i.e. burner, feeder, air blower (fan), CH pump, DHW pump, additional contact and valves
(valves can be opened or closed manually).
Furthermore, the user can regulate the speed of ventilator on the manual operation mode by using “blow force”
function.
V.h) Weekly control
This function allows the user to program the weekly CH boiler operation schedule and to define the pre-set changes
of CH boiler and DHW temperature. The controller can be used to set three weekly control modes.
V.h.1) Weekly control of CH boiler
Weekly control function allows the user to program the pre-set CH boiler temperature changes on specific hours and
days of the week.
In order to activate this function, please select Mode 1 or Mode 2. Detailed settings of each mode are available in the
auxiliary menu: “Set mode 1” and “Set mode 2”.
Having selected the necessary mode, in the main screen you will see the operating temperature deviation value
(below the pre-set CH temperature, contrary than with the advance setting button), which shows to the user that this
function has been activated.
How to change the weekly control settings?
ST-560 controller allows the user to program the weekly control function on two modes: “MODE 1” – the user sets
temperature deviations for all days of the week individually; “MODE 2” – the user sets temperature deviations for all
business days (Monday - Friday) and for weekends (Saturday and Sunday) individually.
How to configure mode 1?
In order to configure mode 1, please select “Set mode 1” –the monitor shows the point of the specific days of the
week.
When the specific day of the week is selected, the screen shows the editing post - the upper row shows the current
deviation, the bottom row shows the time-period.
Please use and to change the time-period. In order to edit the value of deviation, use and .
In order to copy the parameter of the other time-period, please use .
When the temperature changes for the prepared specific day, please press “CONFIRM” icon – the screen will show
the screen allowing to copy the settings on other days.
For example:
Monday
Set: 300, temp. -100C (weekly control parameter –100C) setting: 400,
temp. -100C (weekly control parameter –100C) setting: 500 , temp. -100C
(weekly control parameter –100C)
In this case, if the advance CH boiler setting temperature is 600C, from 300 to 600
13

On Monday, the pre-set temperature drops down to 100C, for the temperature to reach 500C.
How to configure mode 2?
In order to configure mode 2, please select “Set mode 2” –the monitor shows the desk of two-days group –
Monday - Friday and Saturday - Sunday. Please choose the group you want to edit and follow the same procedure as
shown in Mode 1.
For example:
Monday- Friday
Set: 300, temp. -100C (weekly control parameter –100C) setting: 400, temp.
-100C (weekly control parameter –100C) setting: 500, temp. -100C (weekly
control parameter –100C)
Saturday-Sunday
Set: 400, temp. 50C (weekly control parameter –+50C) setting: 500,
temp. 50C (weekly control parameter –+50C) setting: 600, temp. 50C
(weekly control parameter –+50C)
In such case, if the advance CH boiler setting temperature is 600C on each day of the week (Monday-Friday) from 300
to 600, the pre-set temperature drops by 100C, when the temperature reaches 500C. On the weekend from 400 to 700, the
pre-set CH boiler temperature increases by 50C, therefore, the temperature reaches 650C.
Note
For proper operation of the weekly control, it is necessary set the current time and day of the week in
technical maintenance menu >> “Time settings”.
Remove
This function allows the user to eliminate all weekly control settings.
V.h.2) Weekly control of DHW boiler
This function allows the user to program everyday DHW temperature changes. Temperature deviation setting
interval +/-10⁰C. In order to configure DHW weekly control settings, please follow the steps indicated in CH boiler
weekly control manuals.
V.i) Operation modes
The user can select one of the following modes:
V.i.1) Domestic heating
When this function is selected, only the house is heated. CH pump is activated when the temperature exceeds the
pump activation threshold. In case of lower temperature, (minus 2oC –hysteresis), the pump is disconnected.
V.i.2) Water tank priority
By this mode, the water tank (DHW) pump is activated first and then it functions until the pre-set DHW temperature
is reached (the valve is closed in case of achievement of the maximum temperature and valve pumps are
disconnected). (Together with pumps - according to their settings).
The valves are functioning continuously until the temperature of the water tank drops below the pre-set
value minus hysteresis. Then the valve pumps are disconnected and the DHW pump is connected.
14

V.i.3) Parallel pumps
According to this mode, all connected pumps and valves are functioning at the same time. The valves support the
pre-set temperature and the water tank is heated until the pre-set temperature.
V.i.4) Summer mode
When this mode is connected, CH valves are closed to prevent from additional heating of home. If the CH boiler
temperature is too high, the valve is opened at emergency mode (it is necessary to activate the reverse protection!).
When this mode is set, the water tank pump and base valves function according to the settings.
V.i.5) Floor heating
This function is used to disconnect the control of underfloor heating system.
When this option is rejected, the control function closes all the valves attributed to this underground type (see valve
parameters technical maintenance menu). The default settings –function is activated.
V.i) Thermal disinfection
Thermal disinfection covers DHW and can be activated only in the “Water tank priority” mode or “Parallel pump”
mode.
During this disinfection the water temperature in DHW chain reaches min. 60°C (necessary disinfection
temperature).
It is necessary to set DHW device when the thermal disinfection would be performed at least at 60°C (recommended
temperature: 70°C). Piping, reinforcement and technological DHW system design should meet the requirements.
DHW disinfection is aimed at removing Legionella pneumophila - bacteria that weakens the immunity system. Such
bacteria usually proliferates in hot water tanks (optimum temperature: 35°C), it usually happens in water tanks.
When this function is activated, the water boiler is heated until the pre-set temperature is reached. The temperature is
maintained throughout the entire disinfection time (e.g. 10 min.). The standard operation mode is restored.
Disinfection temperature should be reached within 60 min. from the start of activation (default parameter).
Otherwise, this function would be automatically disconnected.
Any changes of this system could be entered only at the time of technical maintenance.
V.j) Screen settings
The main screen settings can be adjusted according to the needs of the user.
V.j.1) Screen view
The user can change the main screen view by choosing the desk to show the current controller parameters.
V.j.2) Screen brightness
This function is used to adjust the brightness of the screen in 10 - 100% interval.
V.j.3) Screen blinking
This function can be used to regulate the brightness of empty screen in 0 –50% interval.
V.j.4) Suppression time
This function allows the user to set the screen suppression time.
V.k) Adjustment menu
All settings in the adjustment menu are described in detail in the sections of this manual.
15

V.l) Maintenance menu
Access to the technical maintenance menu is restricted to the qualified personnel, therefore, it is protected with a
security code that can be provided by the technical maintenance company.
V.m) Language
This function is used to select language.
V.n) Software version
This function provides access to the controller’s software data.
V.o) Factory settings
This function allows the user to restore factory settings saved by the manufacturer.
V. Controller functions - Adjustment menu
Adjustment menu can be accessed by qualified personnel only. It is used to adjust the additional controller functions
such as CH boiler parameters, additional valves, additional pumps, etc. It also permits the user to achieve expanded
settings of basic functions (e.g. Parameters of installed valves).
Below is the simplified adjustment menu block diagram.
• Adjustment menu
• Operational algorithm option
• Full modulation
• Modulation 30%
• Modulation 40%
• Modulation 60%
• Modulation 80%
• Modulation 100%
• Buffer parameters
• Buffer
• OFF
• ON
• Pre-set temperature top
• Pre-set temperature bottom
• DHW function
• From the buffer
• From CH boiler
• Valve settings
• Installed valve 1
• Installed valve 2
• Valve 1
• Valve 2
• Auxiliary contact
• Device type
• CH pump
• DHW pump
• Circulator pump
• Floor pump
• Room regulator
• TECH RS regulator
• Standard regulator 1
• Standard regulator 2
• CH pump station regulator
• Time settings
• Clock settings
16

• Date settings
• Fuel level calibration
• Full tank
• Empty tank
• External temperature correction
• Correction values
• Average
• GSM module
• ON
• OFF
• Ethernet module
• ON
• OFF
• DHCP
• IP address
• IP mask
• Lock address
• DNS address
• Module version
• Restore module password
• Factory settings
VI.a) Operational algorithm option
This function allows to choose the controller operation algorithm: full modulation or one of modulation stages.
Controller operation on each mode is described in detail in Section IV.
VI.b) Buffer parameters
These parameters are used to regulate controller’s operation in the heating system with a buffer.
 Buffer
When the buffer is activated (ON is selected) in the controller’s menu, CH pump is used as amortisation equipment
with two sensors: top (C1) and bottom (C2). The pump remains connected until the pre-set temperature bottom of the
buffer is reached. When the temperature drops below the pre-set temperature top, the pump is activated once again.
 Pre-set temperature top
This function allows the user to set the pre-set buffer temperature top. When this value is reached, the pump is
disconnected (provided that pre-set buffer temperature bottom was reached.
 Pre-set temperature bottom
This function allows the user to set pre-set buffer temperature bottom.
 DHW function
If a buffer is installed in the heating system, it is necessary to indicated how to connect the water tank:
- From CH boiler - heating system where DHW tank is connected directly to CH boiler (separate chain).
- From buffer - heating system where the DHW tank is fitted to or connected to the buffer.
17

VI.c) Valve settings
The module fitted in ST-560 controller regulating the mixing valve. For control valves (e.g. ST-431N), it is possible
to connect two additional modules. The interval of parameters allows the user to adjust the performance of the valve
according to the individual needs. When a specific valve is activated, the monitor shows additional menu where it is
possible to configure valve parameters.
The parameters of both installed valves and additional valve are similar as provided in the flowcharts:
• Installed valve
• ON
• Valve disconnected
• Pre-set valve temperature
• Opening time
• Type of valve
• CH
• floor
• Room regulator
• Control without room regulator
• RS regulator - reduction
• RS regulator - proportional
• Standard regulator
• Room reg. temperature is lower
• Room regulator CH pump
• Valve closing
• Air basis control
• Valve pump
• Always turned on
• Always turned off
• Turned on above the threshold valve
• Turn on the temperature
• Reverse flow protection
• ON
• OFF
• Minimum temperature
• CH boiler protection
• ON
• OFF
• Maximum temperature
• Opening direction
• Left
• Right
• Single stroke
• Minimum opening
• Proportionality coefficient
• CH sensor option
• CH sensor
• Additional sensor 1
• Calibration
• Measurement stopping
• Factory settings
• Additional valve 1, 2
• Registration
• Valve disconnected
• Pre-set valve temperature
18

• Opening time
• Type of valve
• CH
• floor
• Room regulator
• Control without room regulator
• RS regulator - reduction
• RS regulator - proportional
• Standard regulator
• Air basis control
• Valve pump
• Always turned on
• Always turned off
• Turned on above the threshold valve
• Turn on temperature
• Reverse flow protection
• ON
• OFF
• Minimum temperature
• Single stroke
• Minimum opening
• Proportionality coefficient
• CH sensor option
• CH sensor
• Additional sensor 1
• Sensor option
• Calibration
• Measurement stopping
• Factory settings
• Valve dismantlement
VI.c.1) Registration
In case of additional valves, it is necessary to register the valve by entering the number of module (indicated on the
module frame, e.g.: ST-431N) in order to configure its parameters.
VI.c.2) Valve activation/deactivation
This function allows the user to deactivate the control.
VI.c.3) Pre-set valve temperature
This parameter defines the necessary temperature to be maintained by the valve. In case of proper operation, the
water temperature behind the valve comes closer to the pre-set value.
VI.c.4) Opening time
This parameter defines the time necessary for the valve solenoid to open the valve in the 0% to 100% position. This
valve should be adjusted by the value according to solenoid nominal value.
VI.c.5) Type of valve
With this parameter the user selects the type of controlled valve:
19