Biotech Top Light Zero 18 User manual

PELLET AND WOOD CHIP HEATING
Innovative
Quality
Ecient
Sustainable
Know-how
CO2-neutral
User manual
Top Light Zero
Please read these instructions in full before operating the system.
940000192018 / EN / 40s / V1.0

Important
Caution
Please note that even when the system is switched o, various functions are still operational!
(e.g.: the rust prevention unit: Pumps and mixers move periodically during the night hours in order to prevent the
formation of deposits)
In order to be sure that no current is flowing through the system, your heating system must be disconnected from
the mains!
When contacting customer services, please have the serial number and the precise system model ID to hand. These
details can be found on the identification plate, which is located on the system’s day tank.
„The Clean Air Act 1993 and Smoke Control Areas“
Under the Clean Air Act local authorities may declare the whole or part of the district of the authority to be a smoke
control area. It is an oence to emit smoke from a chimney of a building, from a furnace or from any fixed boiler if
located in a designated smoke control area. It is also an oence to acquire an „unauthorised fuel“ for use within a
smoke control area unless it is used in an „exempt“ appliance („exempted“ from the controls which generally apply
in the smoke control area).
The Secretary of State for Environment, Food and Rural Aairs has powers under the Act to authorise smokeless
fuels or exempt appliances for use in smoke control areas in England. In Scotland and Wales this power rests with
Ministers in the devolved administrations for those countries. Separate legislation, the Clean Air (Northern Ireland)
Order 1981, applies in Northern Ireland. Therefore it is a requirement that fuels burnt or obtained for use in smoke
control areas have been „authorised“ in Regulations and that appliances used to burn solid fuel in those areas (other
than „authorised“ fuels) have been exempted by an Order made and signed by the Secretary of State or Minister in
the devolved administrations.
Further information on the requirements of the Clean Air Act can be found here: http://smokecontrol.defra.gov.uk/
Your local authority is responsible for implementing the Clean Air Act 1993 including designation and supervision of
smoke control areas and you can contact them for details of Clean Air Act requirements”
“The Biotech PZ65RL and PZ100RL has been recommended as suitable for use in smoke control areas when burning
Wood Pellets.”
“The Biotech Pellet Boilers have been recommended as suitable for use in smoke control areas when
burning Wood Pellets”
2014
18,5 kW
85° C
75 ltr.
Symbol (may not match the type plate on the boiler)
System Model Serial number

3
Contents
01 Information about the handbook 4
1.1 Symbols 4
1.2 Concept explanation 4
02 General information 4
03 Safety information and instructions 6
04 Boiler 8
05 Using the controller 8
5.1 Cleaning 8
5.2 Overview of controls and indicators 9
5.2.1 Basic controls 9
5.2.2 Numerical keypad 10
5.2.3 System ON/OFF 10
5.2.4 Time settings 11
5.3 Menu structure 12
5.3.1. User level 12
5.3.1.1 Start page 13
5.3.1.2 Overview page 13
5.3.1.3 Boiler 15
5.3.1.4 Buer 15
5.3.1.5 Hot water 16
5.3.1.6 Heating circuit 17
5.3.1.7 Solar 19
5.3.1.8 Storage 19
5.3.2 Technical level 20
5.3.2.1 Messages 21
5.3.2.2 Maintenance 21
5.3.2.3 System info 21
5.3.2.4 Hours of operation 21
5.3.2.5 Boiler log 22
5.3.2.6 Energy log 23
5.3.2.7 Components 23
5.3.2.8 Settings 23
5.4 Remote access 29
5.4.1 Web server 29
5.4.2 VNC-Server 29
5.4.3 E-Mail 29
06 Annex 30
A. Module assignment 30
B. Frost protection 36
C. Seizing protection 36
07 Regular maintenance 36
7.1 Empty out the ash compartment / clean the combustion chamber 36
08 Notes 38

4
01 Information about the handbook
Important information
iImportant information/instructions are highlighted in this way
(with lines above and below the text).
1.1 Symbols
Heat distribution
Indicates all components of the heating system used to store heat (buffer / hot water tank) or distribute it (the hot
water circuit itself), as well as connections to alternative energy sources (solar system, external boiler).
1.2 Concept explanation
02 General information
• The system may only be commissioned by our customer service department or a technician certified by us to do
so.
• Pellet heating systems with nominal power of more than 50 kW must be equipped with a buer storage tank
sized to provide sucient hot water for 1.5 hours operation once the daily service tank has been filled. The system
switches itself o automatically at least once a day for cleaning (heat exchanger and grate cleaning). Depending on
the amount of pellets remaining in the reservoir, along with its size and system power, the process (burning out /
filling / ignition) may take up to 1.5 hours to reach nominal power output (100% power) – the buer storage tank is
not filled during this time.
• Recommendation: For long burner run times, to generate a constant chimney draft, to reduce start/stop emis-
sions and maintenance requirements: Equip the heating system with a conventional buer storage tank, thermo-
siphon buer storage tank or combination storage tank. In practice, buer storage tanks rated at 40 to 75 l/kW
have proved to be eective solutions. Observe all local legislation regarding the use of buer storage tanks. The
system may only be operated when it can be guaranteed that running it for a period of no less than 2 hours draws
50% of the nominal boiler heat.
• Use only the type fuels we recommend- wood pellets atoccording EN 14961-2, Class A1+ A2 (Ø 6 mm). Only in
this way will your pellet heating system operate with low emissions, cost eectively and without malfunctions. Fail-
ure to observe this rule may be dangerous, and voids the warranty/guarantee!
• Clean the pellet heating system at regular intervals, as specified in this handbook. Maintenance must be done by
our customer service department or a certified partner. This not only ensures that the system and its safety equip-
ment are safe to operate, but also that it runs eciently and with low emissions. We strongly recommend that you
stipulate a service contract. The specified cleaning and maintenance intervals are mandatory. Please note that
damage caused by failure to observe the maintenance instructions is not covered by the warranty.

5
• Your pellet heating system has a thermal capacity that varies from 30% to 100% of nominal power, and is automati-
cally self-regulating in relation to demand. The equipment should be run as far as possible at moderate to high
power (depending on heating demand), in order to avoid unnecessary emissions in low power mode. It is best
combined with a modulating room or heating controller to prevent unnecessary restarts and provide long com-
bustion cycles.
• The manufacturer is not liable for any damage caused by unauthorised technical modifications to the system.
• Any work done on the system by unauthorised persons, and failure to observe these general instructions and the
safety information given below, immediately voids the warranty.
• Only use original spare parts to replace damaged parts and components.
• Make sure to keep this handbook to hand in the boiler room.
• The pellet heating system described in the following instructions has been constructed and tested according to
EN303-5.
• Observe the standard heating system regulations for the prevention of Legionella.
• IMPORTANT: When using a pellet heating system with 2 suction turbines (e.g. 100kW pellet heating boiler) the
storage space is unevenly emptied (it cannot be emptied completely). Please plan for this eventuality by dividing
the storage space by 60% to 40%.
• The system must be serviced at least once a year, and no less frequently than every 1500 hours of operation (for a
power range of 80 - 100% ) by a certified technician. If the system is NOT serviced, the warranty becomes void.
• The boiler is guaranteed for 5 years against leaks, and the electronics are guaranteed for 2 years; seals and
consumable parts e.g. vacuum brushes are not covered.
• If necessary, all seals and consumable parts will be replaced during maintenance (at a cost). The system can only
be serviced when it is cold. If the system has not been shut down suciently in advance and is still hot when the
technician arrives, the resulting lost time will be charged separately in the invoice.
• Foreign objects in the fuel can damage the system.
• Please follow the UK Pellet Council guidelines for pellet delivery and storage (http://www.r-e-a.net/upload/
ukpc_storage_guide.pdf), but always consult your local delivery company for advice.
• Applications with a high level of safety in relation to heating (hotels, process heating, etc.) must be implemented
with bivalent or dual boiler configurations of a suitable size. In case of failure to observe these requirements we
decline all liability due to damage caused by insucient heat supply. Biomass heating systems must be super-
vised, depending on the system (by the building porter, maintenance sta, etc.), to ensure that the prescribed
maintenance is done at the specified intervals!
• To ensure optimal operation of the heating system, sucient combustion air must be available in the boiler room.
Local regulations must be observed. Note that insucient oxygen supply (ventilation) can result in malfunctions
that are not covered by the warranty/guarantee. Ventilation openings must not be closed or obstructed in any
way.
Data sheet for EN 14961-2, Class A1+ A2 (Ø 6mm) compliant wood
pellets
Parameter (unit) ENplus-A1 ENplus-A2
Length (mm) 3.15 to 40 13.15 to 40 1
Dust content (%, weight) ≤ 1 2≤ 1 2
Ash content (%, weight) ≤ 0.7 3≤ 1.0 3
Ash reduction temperature (°C) ≥ 1200 ≥ 1100
1) No more than 5% of the pellets may be longer than 40 mm, max. length 45 mm.
2) Particulates < 3.15 mm, dust content at last loading station.
3) Waterfree state (wf)

6
03 Safety information and instructions
Read the safety information before operating the system!
Failure to observe the safety information can result in injury, danger to life and damage to the system and the
building!
The current draw of the system-side equipment (boiler circuit pump, circulation pump, heating circuit pump, etc.)
cannot exceed 1800 W.
A heating system emergency switch which cuts o heat generation while continuing the operation of the heating
circuit must be installed outside the boiler room! (Not mandatory in Germany, but recommended) Disable this
switch before running maintenance or repairs!
• The manufacturer is not liable for damage due to incorrect connection of the delivery and return circuits – do not swap
the fittings. The connections must be removable and unstressed. Make sure the boiler can be vented when installing the
pipes. Fit the system with shut-o equipment at suitable points to facilitate maintenance (e.g. Isolation valves, (ball cocks
are a very specific valves fitted in a water resevoir tank) etc.).
• Before connecting the boiler to the heating circuit: Flush all pipes and free them of any residual foreign matter.
• Caution: The safety valve can be hazardous when it discharges! Convey the discharged water to a suitable drainage
point.
• Before starting up the system, check that the boiler is watertight. Charge the boiler to the safety valve's trip pres-
sure. Over pressurizing the system may cause damage to the pressure relief valve and other safety equipment. Run
water-tightness tests as required by local regulations.
• Only fill the boiler when it is cold. The flow temperature may not exceed 40° C.
• The pellet heating system may only be operated when in perfect working order. Malfunctions and damage which com-
promise or threaten to compromise its safe operation must be resolved by our service department or a technician cer-
tified by us to do so.
• The system may only be installed by our customer service department or a technician certified by us to do so. The
system has electrical components and rotating parts that could cause crushing hazard if not operated safely.
• Live cables (240volts) are routed under the panels and behind inspections hatches do not open unless authorised to do
so.
• Never open the boiler's service hatches while it is operating; hot flue gas and ash may issue from them.
• Before cleaning the system, shut it down. Switch it o with its ON/OFF switch. Wait for the system to cool down (the
boiler temperature is shown on the display). Emergency shut-o not always fitted. Should say 'do not work on the boiler
until the boiler is suitable isolated from the mains electrical supply' or disconnect it form the mains.
• Before sweeping the combustion gas pipe/flue, the chimney sweep must switch the system o with the ON/OFF switch
and wait for the remaining pellets to burn out (around 20 minutes). Possible hazard due to explosion risk from flue gas
build up.
Electrical connection: 230 V, 50 Hz; 16 A fuse, delayed trip.
Disconnection via ground fault circuit interrupter (voltage limits per EN-50160).
CAUTION: ISO 60364 must be observed!
Operating limits: Max. ambient temperature 0-45° C; max. humidity 0-95 %
Only use original Biotech Energietechnik GmbH spare parts!
Biotech Energietechnik GmbH guarantees repairs and supply of spare parts for at least 10 years after the date of
purchase!

7
• Never use flammable fluids inside the combustion chamber.
• Never attempt to repair our systems yourself; contact our technical department when necessary.
• The system must be fitted with a "No smoking or open flames" notice (danger when filling the pellet reservoir).
• A certified fire extinguisher must be kept in the boiler room / installation room.
• Make sure the room is properly ventilated with fresh air.
• Shutting down the system over a certain period of time (e.g. summer time). Clean the system and remove all ash before
shutting the system down. In order to prevent damage due to condensation, leave the boiler doors open to ventilate it.
• Lock the boiler room against unauthorised access, especially against children.
• Once a month, check the tightness and condition of the boiler doors and water fittings.
• Once a year, check the safety temperature limiter (STL) (this is done during maintenance or service).
• Do not remove, bypass or disable any safety or control equipment in any way.
• When cleaning the system, and when removing the ash, wear a dust mask, in order to prevent health hazards and
potential damage.
• Before filling the fuel storage with a delivery truck, shut the system down (wait for 20 minutes).
• If the domestic hot temperature is set higher than 60° C, a thermostatic mixing valve must be installed (scalding
hazard).
• The pellet heating system may only be installed and operated in proper structural sound and water tight room. The
pellet boiler is not designed for use outdoors. It may only be used in machine rooms out of the way of water (drop,
spray and jet).
• A air release valve must be installed at the top of the boiler.
• The heating system must be filled with heating water according to BS 7593, Code of practice for: Treatment of water
in central heating systems.
• The pellet boiler must be fitted with safety equipment to protect it against water overpressure when connecting it to
the water supply/heating circuit (e.g. pressure relief valve).
• The pellet boiler must be fitted with safety equipment to prevent non-potable water being sucked back into the water
supply. Must incorporate a stop valve to BS1010, double check valve, and flexible pipe.
• The heating water must be inspected annually based on Standard BS 7593, Code of practice for: Treatment of water in
central heating systems.
• The safety valve must be checked annually by a technician.
• The expansion tank must be checked by a technician on a regular basis .
• The ash discharge, automatic furnace and feeding device must be inspected regularly per No idea what this is could
you please explain.
• The customer must implements fire safety regulations as required by the authorities!
• Please note that a variety of functions are still active even when the system is switched o! (This includes the frost
protection system; the pumps and mixers are run from time to time at night to prevent the bearings from locking). The
only way to be absolutely sure that no parts of the system are live is to disconnect it from the mains!
• Is this a low pressure switch cut-o. There are no legal reasons in the uk for this, do we need to fit one for warranty?

8
04 Boiler
05 Using the controller
The controller is equipped with a pressure sensitive "resistive touchscreen". It therefore must be used differently
from a smartphone with capacitive touchscreen, which responds to even a very light touch.
Do not use pointed or sharp objects on the touchscreen.
The touchscreen may only be cleaned with a soft cloth. To wet the cloth, use a monitor cleaning product (e.g.
antistatic foam cleaner), water with detergent or alcohol. In order to prevent humidity from entering the device,
spray the cleaning product onto the cloth and not directly onto the screen itself. Do not use abrasive products,
chemicals, scouring agents or hard objects, as they can scratch and damage the screen.
Reservoir  Burner
Vacuum flap  Ignition device
Separator  Air mass sensor
Vacuum generator  Grate cleaning drive
Worm drive  Heat exchanger cleaning
Lambda sensor  Controller
5.1 Cleaning
 









9
1 Date Press to change/set the date
2 Time Press to change/set the time
3 Outdoor temperature -10° C, if no exterior temperature sensor is connected
4 Chimney sweep function Only to be activated by authorised personnel
5 Settings/technician level Opens the system page – the icon is displayed highlighted in
white.
6 Overview page Opens the overview page – the icon is displayed highlighted in
white. Press again to switch between the overview page and the
homepage
7 Main controller switch
5.2 Overview of controls and indicators
1 Current message Displays information, warnings and faults which have not been acknowledged. Pressing the
message opens the acknowledge dialogue.
2 Navigation path Indicates which page is currently being displayed.
5.2.1. Basic controls
Close Closes the current selection/indicator window
iIf a window is open with the "close" button in the top right hand corner (e.g. the numerical keyboard) - the contorls
outside the window are disabled including the main on/o function.
Back Returns to the previous page
Scroll up Displays values higher up a list.
Scroll down Displays values further down a list.
Temperature setting: Right arrow = increase - left arrow = decrease
      



10
5.2.1.1 Numerical keypad








1 Left arrow Decrease value by one unit
2 Minus Assigns a negative sign to an existing (entered) value.
3 Point Decimal point for non-integer numbers
4 Maximum value Indicates the upper limit for an entry
5 Right arrow Increase value by one unit
6 Minimum value Indicates the lower limit for an entry
7 Cancel Cancels the current value / deletes the most recently entered digit.
8 Accept Accepts the entry and closes the keypad
5.2.2. System ON/OFF
Red: The system is OFF. Green: The system is
ON.
Yellow: Either the boiler or
the heating circuit are on, but
not both.
1 Separate main switch Pressing this switch turns the boiler and heating circuit ON/OFF independently.
2 ON/OFF Press to turn the system ON/OFF
Press the main switch button to open the ON/OFF dialogue.


11
5.2.3. Time settings
Grey: Opens the time settings page (on the component detail pages)
Red: The time settings page is open
Up to three time windows can be set for each day of the week (Mon–Sun), in which the corresponding component
is activated
In order to apply a given setting to multiple days, mark the days in question (left) by touching/swiping them (e.g. Mon-
Fri with white background) BEFORE making the settings themselves. All settings made thereafter will apply to all the
marked days.
Active: Inactive:

1 Time window status (active/inactive) Press to turn the time window ON/OFF
2 Start time
3 End time
iThe start time must precede the end time. For 24-hour ("round the clock") operation, set the start time to
00:00 and the end time to 23:59.

12
5.3 Menu structure
5.3.1. User level
Start page
Overview
Boiler Buer Heating circuit Hot water Solar Storage

13
5.3.1.1. Start page
1Eco Shows the combustion eciency. It is normal for the indicator to move in the left (grey) zone during
ignition, and does not indicate a defect.
2 Power Shows the boiler power (percent of nominal power)
3 Pellet Shows the day container filling level (left = empty, right = full)
5.3.1.2. Overview page
Up to six components with their status and principal parameters are displayed on the overview page.
Pressing a component field opens the respective detailed page, where settings can also be made.
1 Navigation arrows Used to switch between overview pages when more than six components are
present
2 Component
3 Status display The status of each component is displayed at the top right.
4 Component designation The name is used to identify the component, especially when the system has
multiple components of the same type (e.g. heating circuit). The name can be
modified in module configuration (see component designation, page 27)

 





14
Status display
The following symbols apply to multiple component types. Component-specific symbols are detailed below for
each component separately.
OFF The entire system/boiler/power distribution or component is switched o.
None
Symbol
Ready The component is in standby. When all start conditions are satisfied, it goes into active
mode.
Active See description of component (below)
Warning The component cannot operate properly. Messages (see page 21) are accompanied by
a corresponding entry.
Frost
protection
Components
Boiler with current boiler
temperature
Fill day container, prepare for ignition, ignition,
STL process
Burn, heat, burn out, post-ventilate
Buer with upper and
lower temperature
Buer charging in progress
i
Even though buer loading is shown to be active, the charging pump is not necessarily running.
The buer charging pump is only activated when the boiler temperature is at least 3° C greater than
the upper buer temperature. When the boiler temperature is less than 1° C greater than the upper
buer temperature, the charging pump is switched o.
Hot water with current
temperature
Hot water charging active (see buer information above)
Heating circuit with current
flow temperature
Day operation (within the set time window) The flow
calculation is done in relation to the "Day temperature"
setting
Lowering mode (outside the set time window). The
flow calculation is done in relation to the "Reduced
temperature" setting
Summer mode. The heating circuit is switched o (pump
o, mixer closed)
Solar with current collector
temperature
Solar charging active (pump running)

15
5.3.1.3 Boiler
   

1 Current status / phase of boiler
2 Remaining duration of current phase (e.g. burning)
3 Next phase of boiler
4 Phase after next phase of boiler
5 Cause of termination of most recent heating phase, with time of occurrence
5.3.1.4 Buer
Charging starts when the time is within an active time window and the upper buer temperature is below the "Switch
on temperature" setting. If the lower buer temperature rises to above the "Switch o temperature" setting, charging
stops.
If the time window expires during a charge cycle, the cycle is continued until the deactivation temperature is reached.
1 Current upper buer temperature (activation criterion)
2 Mode
O The buer is never charged (exception: see frost protection page 36)
On Charging is controlled as described above
Automatic Like On with summer mode:
When all users connected to the buer are O or in summer mode
(in case of heating circuits), the buer itself is switched o until heat is
required once more.
If no users are assigned, it behaves as in On mode.
3 Current lower buer temperature (deactivation criterion)




16
5.3.1.5 Hot water
Charging starts when the time is within an active time window and the hot water tank temperature is below the
"Switch on temperature" setting. If the temperature rises to above the "Switch o temperature" setting, charging stops.
If the time window expires during a charge cycle, the cycle is continued until the deactivation temperature is reached.
1 Current hot water temperature (activation/deactivation criterion)
2 Mode
O The hot water is never heated (exception: see frost protection page 36)
On Charging is controlled as described above
3 Circulation time
like hot water The same time settings apply as for hot water
own Specific circulation pump time settings can be applied (clock field
displays)
4 Current circulation temperature acts as activation/deactivation criterion (only displays when a
temperature sensor is connected)
iThe circulation settings are only displayed when this option is enabled in module configuration.



Circulation
Without a temperature sensor, the circulation pump runs continuously during the activated time windows (according
either to the hot water time settings or to its own circulation time settings). If a temperature sensor is present, the
circulation pump runs during the activated time windows when the measured temperature is below the activation
temperature setting. If the circulation temperature remains equal to / higher than the activation temperature for at
least one minute, the pump stops running once more.


17
Basic settings
Mode Heating circuit operating mode
O Pump o, mixer closed.
Automatic The flow temperature is calculated from the characteristic curve and the
day/lowering time settings are observed. Switching between summer/
winter modes is active.
Day The flow temperature is calculated from the day temperature characteristic
curve. Lowering is deactivated. Switching between summer/winter modes
is active.
Set back
temperature
The flow temperature is calculated from the lowering temperature
characteristic curve. Switching between summer/winter modes is active.
Room
thermostat
The mode (day/lowering/auto) can be set on the room controller. If no
room controller is connected, the heating circuit runs in auto mode.
Fix The flow temperature is regulated to the fixed temperature setting (see
fixed flow temperature, page 25). The time settings have no eect.
Switching between summer/winter modes is not active.
Day temperature The target room temperature during the heating phases enabled with the time settings.
In order for this temperature to actually be achieved in the room, the flow temperature
characteristic curve must be set properly in relation to the building and the heating system
(floor heating, wall-mounted radiators, etc.)
Reduced temperature The target room temperature outside the heating phases enabled with the time settings.
iTo make the heating circuit switch o during the lowering phase, the lowering temperature
must be set so low that the flow temperature characteristic curve gives a target flow
temperature below the minimum flow temperature.
5.3.1.6 Heating circuit
The heating circuit is controlled by the ambient temperature, i.e. the flow temperature is determined in relation to the
outdoor temperature. Up to three time phases can be set per day, in which the target temperature is given by the "Day
temperature" (in the living space). Outside these phases, the lower "Reduced temperature" takes eect.
Once the outdoor temperature exceeds the summer temperature (see summer temperature, page 25) for the duration
of the switching delay (see switching delay, page 25), the heating circuit switches to summer mode. Switching to
heating (Day/Lowering) happens in a similar way when the temperature drops below the winter temperature (see
winter temperature, page 25).
A special summer deactivation occurs when the calculated target flow temperature lies below the minimum flow
temperature setting.

18
Flow temperature characteristic curve
The flow characteristic determines the relationship between the flow temperature and the outdoor temperature.
1 Up arrow Increases the flow target temperature, left -20° C, right +20° C outdoor
temperature
2 red value (left) Day flow target temperature at -20° C outdoor temperature
3 blue value (left) Lowering flow target temperature at -20° C outdoor temperature
The dierence between the day and lowering flow target temperatures is given by the
dierence between the day and lowering temperatures (see basic settings, page 17)
multiplied by the "room influence"
4 Down arrow Decreases the flow target temperature
5 dashed line (top) Maximum flow temperature
6 red value (right) Day flow target temperature at +20° C outdoor temperature
7 blue value (right) Lowering flow target temperature at +20° C outdoor temperature
8 dashed line (bottom) Minimum flow temperature









19
5.3.1.8 Storage
The specified consumption is only a guide, and is not intended to be the only criterion for ordering pellets. The
storage filling level must be necessarily checked at regular intervals.
Once the storage has been refilled, the calculated consumption can be reset to 0.0 tons.
Time settings
In order to assure ecient operation, the filling of the day container should interrupt the heating cycle as little as
possible, and occurs at the following conditions:
Boiler start during an active time window and filling level under 90 %, or
end of an active time window and filling level under 70 %.
Basically, the container should only be filled during an active time window. In order to assure hot water supply even
at periods of peak demand or during a too short time window, the container is filled when the filling level lies below
minimum level, even outside an active time window.
Filling can be started independently of the time settings on the maintenance page (see page 21).
If the automatic heat exchanger cleaning cycle is required (depending on the duration of heating), it runs at the same
time as the daily bin is being filled.
1 Mode
O The solar pump never runs
Automatic Solar heating system running
2 Target temperature buer 1 If the tank 1 temperature (e.g. hot water tank) lies below this value, the
valve switches to tank 1. The temperature of tank 1 is combined with
that of the collector as an activation/deactivation criterion for the solar
pump.
3 Current buer 1 temperature
4 Maximum temperature buer 1 If the tank 1 temperature is higher than this value, the valve switches to
tank 2 (e.g. buer storage tank). The temperature of tank 2 acts as an
activation/deactivation criterion for the solar pump.
5.3.1.7 Solar
The solar pump runs when the collector exceeds the minimum temperature and is hotter than the tank. The controller
can switch between two tanks.


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5.3.2 Technical level
System page
Messages Maintenance System info Hours of operation Boiler log Energy log Components Settings