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2012-11-14
EN_Englisch
Log Boiler
20-60 kW
Operation
Contents
Contents
2
Conditions for warranty, guarantee, liability ........4
Emission measurement ...................................6
Chimney renovation .......................................7
Boiler functionality ........................................8
Start-up ..................................................... 10
Checking water pressure, suitable fuel ................ 10
Correct quantity of wood ................................ 11
Water pressure, heating lines, cleaning lever ........ 12
Charging status of buffer storage tank ................ 13
Adding wood .............................................. 14
Ignition, closing doors ................................... 15
Closing ignition and insulation doors ................. 16
Adding fuel ................................................. 17
Safety ........................................................ 18
Safety devices to prevent overheating ................ 18
Maintenance ............................................... 20
Overview of activities .................................... 20
Each time the boiler is filled ............................ 21
Every 1 - 2 weeks ........................................ 22
Annually .................................................... 24
Every 3 years ............................................... 28
Approval, antifreeze, pressure equalisation, venting
Softened water, safety valve .......................... 33
Return riser and safety devices ....................... 34
Minimum heat consumption, buffer storage tank 35
Split wood will dry out in just one summer ......... 36
Heating value of wood .................................. 37
User interface .............................................. 38
Adjusting the date and time ............................ 38
Changing the language .................................. 39
Changing function block names ........................40
Alarm, error, warning, message ........................ 41
Opening the text menu .................................. 42
Buffer [Buffer] ............................................. 46
Overview, buttons, functions ...........................46
Buffer with solar .......................................... 47
Combination tank with solar ...........................48
"Buffer bottom max." for solar heating systems .... 49
Heating circuit [HC1] ..................................... 50
Overview, buttons and functions ...................... 50
Operating states ........................................... 52
Setting heating time slots ............................... 54
The heating curve ......................................... 56
Adjusting the heating curve ............................ 58
Setting the "enable temperature" .....................60
Adjusting the "Set-back" ................................ 61
Service and maintenance records ..................... 62
Meanings of symbols
Important NOTICES for operation.
CAUTION: Failure to observe these notices can
result in property damage.
STOP: Failure to observe these notices can result in
personal injury.
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Preface
Preface
Dear Customer,
We are delighted to count you among our customers.
To ensure satisfactory operation of your new boiler, you need to know how to operate, clean and maintain it. This manual contains information and advice on much more than just the boiler itself.
Warranty and guarantee
You should also read the "Conditions for warranty, guarantee, liability" ( page 4 ) carefully. As a rule, these conditions will be satisfied by a professional heating technician. Nevertheless, inform the technician of our warranty conditions. All of the requirements we impose are intended to prevent damage that neither you nor we wish to occur.
Information worth knowing in this regard can also be found starting on page 32 .
Optimum use of the control systems installed in our boilers
There are two different access levels for the control system:
At the CUSTOMER level, you can adjust the control system to your wishes and needs without any risk of altering the system configuration set by the heating system expert.
Only your technician or a customer service employee should change settings at the SERVICE level. Before making any adjustments to these settings yourself, it is essential that you consult an expert.
Read this manual
carefully before starting up the system. This is the only way to ensure that you can operate your new boiler efficiently and with minimum environmental impact.
Take advantage of the knowledge and skills of an expert.
Only allow an expert to assemble, install and commission the equipment and make the basic boiler settings. Insist on receiving an explanation and training on how your new boiler functions and how to operate and maintain it.
Extended warranty for commissioning performed by an authorised partner company
If your newly installed boiler is commissioned by an authorised partner company or one of our customer service employees, we offer an extended warranty. Refer to our warranty conditions in effect at the time of purchase.
Service agreement
You can ensure the best care for your heating system by taking out a service agreement with one of our certified heating system contractors or our own customer service.
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Conditions for warranty, guarantee, liability
Conditions for warranty, guarantee, liability
We can only guarantee and accept liability for the function of our boiler if it is properly installed and operated.
Requirement for warranty, guarantee and liability is that this boiler be used in accordance with its intended purpose,
only for heating and hot water supply with no more than 2,000 full-
load hours annually, and, in particular, that the following general conditions be observed during installation and operation:
For set-up, a
dry room is required. In particular, only condensation dryers may be used as clothes dryers in the same room.
Local building and fire protection regulations must be observed.
The log wood boiler is suitable for use with air-dried
split logs with no more than 20%
water content and wood briquettes. Use with unsuitable fuels, especially refuse, coal and coke, and also wet wood, is not permitted.
The
combustion air must be free of aggressive
substances such as chlorine and fluorine from solvents, cleaning agents, adhesives and propellants, or ammonia from cleaning agents, to prevent corrosion of the boiler and chimney.
Water is the intended heat-transfer medium. For special anti-frost requirements, up to 30% glycol may be added.
Softened water is required for the initial fill-up of the heating system and for
refilling after repairs. For the initial fill-up, the value of 20,000 lt°dH for the system volume in litres multiplied by the hardness (in degrees of
German hardness) may not be exceeded. The
pH value should be set between 8 and 9.
Addition of hard water should be minimised to limit limescale build-up in the boiler. Set enough shut-off valves to avoid bleeding large amounts of water during repairs. Any leaks in the system must be repaired at once.
Ensure a
minimum return temperature of 60°C to the boiler.
A
safety valve (3 bar) as protection against excess pressure and a
thermal relief valve (95°C) to protect against overheating must be installed by the contractor.
To protect against air suction if the system cools off, an expert must provide a
sufficiently large
expansion tank or a pressure maintenance system. Sufficient air venting must also be ensured.
Open expansion tanks or underfloor
heating with permeable piping also have a high air intake, resulting in above-average boiler corrosion. Corrosion damage to the boiler due to improper air venting or high air intake is excluded from warranty, guarantee and liability.
Operation at lower power than the lowest power specified on the type plate is not permitted.
Only components provided by us may be used for expansion of the control system, except for commonly used units such as thermostats.
Cleaning and maintenance are required as specified in the user manual.
Repairs are only
permitted with spare parts
provided by us. The only exceptions are common standardised parts such as electrical fuses or fastening materials, as long as they possess the required features and do not restrict the functionality of the system.
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The
installing contractor is liable for proper installation according to the boiler's installation instructions and the relevant rules and safety regulations. If you as customer have installed the heating system partly or entirely without relevant training and in particular without up-to-date practical experience, without
having the installation checked by a trained and
responsible expert, we exclude defects in our delivery and consequential damages resulting from this cause from our warranty, guarantee and liability.
For
repair of defects carried out by the
customer or by third parties, ETA only bears the costs or remains obligated by warranty if this work was approved in advance by the customer service of ETA Heiztechnik GmbH.
Conditions for warranty, guarantee, liability
Subject to technical alterations
We reserve the right to make technical modifications without notice. Printing and typesetting errors or changes of any kind made in the interim are not cause for claims. Individual configurations depicted or described here are only optionally available. In the event of contradictions between individual documents regarding delivery scope, the information in our current price list applies.
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Emission measurement
Emission measurement
Why measure emissions?
It is a requirement for the carbon monoxide (CO) emissions of every boiler to be measured periodically. In Germany, this periodical measurement must also include a dust measurement.
There are several aspects of this that could go wrong, resulting in incorrect measurements even though the boiler fully and consistently complies with these limits when operating in accordance with the relevant standards.
Boiler and flue tube must be cleaned thoroughly
3 days before measurement
The chimney sweep will contact the owner of the boiler when the measurement is due to take place. The boiler and the flue tube must be cleaned thoroughly 3 days before the measurement takes place. The remaining charcoal stays in the fuel chamber.
Heat up the boiler after cleaning
After cleaning, the boiler must be heated up again.
This allows dust that was stirred up during cleaning to settle.
Under no circumstances clean the boiler and flue tube on the day of the measurement!
Cleaning on the day of measurement should be avoided as the chimney sweep's measuring probe would measure the unsettled dust, resulting in a falsely high dust reading.
The buffer must be empty at the start of the measurement
The boiler and the buffer should be shut down before the measurement. This is best done the night before to prevent the boiler from switching to partial load during the emission measurement.
Use half-metre logs for the emission measurement
For the emission measurement,
split half-metre
logs are to be used, stacked as tightly as possible in the boiler (no round logs). The fuel chamber should be filled as full as possible and the burnthrough openings on the grate must remain free.
Heat up boiler 1-2 hours before measurement
Heat up the boiler 1-2 hours before the chimney sweep's arrival.
Ensure sufficient heat consumption
Open all the radiator valves and turn the radiator thermostats to maximum.
Close doors at 100°C exhaust gas temperature
At 100°C exhaust gas temperature, close the ignition door and the insulation door. Do not open any doors before and during the emission measurement. Also, do not stoke the fire.
Switch boiler to emission measuring mode
In the boiler overview screen, tap . This switches the boiler into
emission measurement
mode and operates it for 30 minutes at full load.
The control system ensures that sufficient heat is channelled to the buffer, the heating circuits and the hot water tank. The button shines green and a countdown for the emission measurement mode is displayed.
Wait 10 minutes, then perform emission measurement
Once emission measuring mode has been activated
( ), wait for 10 minutes until the boiler has reached the required operating temperature and stable combustion is ensured. Then carry out the
emission measurement.
After the measurement
After the measurement, emission measurement mode can be deactivated by pressing again. If this button is not pressed, the boiler will automatically switch back to normal mode after 30 minutes.
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Chimney renovation
With its controlled induced-draught fan and adjustable minimum exhaust gas temperature, your new boiler will largely adjust to existing flues without the need for any special measures. Nevertheless, you should have the suitability of your flue checked by a chimney sweep or chimney builder.
If the draught exceeds 30 Pa in very tall flues, a draught-regulating damper is required.
Modern heating boilers are more efficient than older ones and thus produce smaller amounts of exhaust gas at considerably lower exhaust gas temperatures.
Flues with "too large a cross-section" in particular are no longer heated adequately. The moisture contained in the exhaust gases condenses in the flue and leads to very slow but inexorable destruction of old masonry chimneys.
Furthermore, if the diameter of the flue is too large, the exit velocity and temperature are too low. The exhaust gas does not have enough energy to rise and, in extreme cases, the smoke can flow down the roof.
If your flue does not have a water-resistant liner or its diameter is too large, it will need to be renovated with the addition of a moisture-insensitive inner lining. If the existing flue cross-section is adequate, a ceramic liner that is also resistant to chimney fires is preferable to a stainless steel liner when burning wood.
In the case of short flues that are not resistant to moisture, it may suffice to raise the lower limit for the exhaust gas temperature to 180°C in the boiler's control system. In addition an auxiliary air damper will help to keep the flue dry. If these measures are deemed satisfactory, the flue should be inspected to check whether it actually remains dry. This is best discussed with the chimney sweep.
Also keep in mind that chimneys have a limited service life. Timely renovation before the chimney wall has been destroyed can be performed quickly and easily by inserting a tube. But if the flue gas condensates have penetrated the mortar joints, then the entire flue must be dismantled and rebuilt.
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Chimney renovation
Chimney renovation
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Boiler functionality
Boiler functionality
8
Wood gasification
Before wood can burn, it must first be converted into gas by application of heat. From 100°C, the moisture contained in the wood is driven off. From
200°C, the process of decomposition into 20% charcoal and 80% wood gas, a mixture of carbon dioxide, carbon monoxide, hydrogen, methane, methanol, various phenols, acetone and acetic acid begins. Gas is released from a temperature of
400°C. However, a temperature of at least 900°C is required to fully break down phenols (wood tar) into combustible carbon, carbon monoxide and hydrogen; 1100°C is better. In addition to a high temperature, breaking down complex compounds into wood gas also requires time; this explains why the gas flame of a wood fire lasts so long.
Large wood supply in the fuel chamber
At the base of the stack of wood in the fuel chamber, a small gasification fire is maintained through a controlled flow of air (primary air) (1).
The boiler's control system regulates the output of the gasification fire via the flow of primary air
(2). The wood gas is drawn downwards into a hot combustion chamber. This prevents the stack of wood in the fuel chamber from undergoing uncontrolled gasification and starting to burn and makes it possible to have a boiler with a large supply of wood that burns slowly for a long time.
Mixing nozzle and complete turbulence
A mixing nozzle (3) is located between the fuel chamber and the combustion chamber. Here preheated combustion air (secondary air) is mixed with the wood gas. The flame exiting the mixing nozzle hits the hot bottom of the combustion chamber with high velocity and experiences further turbulence (4), ensuring that every bit of combustible gas finds sufficient oxygen for complete burnout.
Complete burnout in the glow zone
To achieve uncooled combustion at high temperatures, the patented glow-zone combustion chamber is made from refractory brick and is also thermally insulated (5). In this glow zone, the flame has enough time at temperatures between
900°C and 1100°C to break down and burn the very last of the resistant carbon rings (phenols) from the lignin in the wood. This enables the log boiler to go below the limit of 100 mg of carbon monoxide in the exhaust gas per MJ of output.
4
3
1
7
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2
5
6
Optimum fuel efficiency with lambda control
Gasification of the wood (output) can be controlled via the flow of primary air. Through use of the lambda-controlled secondary air (6), combustion is kept clean and highly efficient. A lack of air means there is not enough oxygen for complete combustion. On the other hand, too much air also results in incomplete combustion as it cools the fire. Below 700°C, not all of the wood gas is burned. Too much air also pulls unused heat out of the boiler. The lambda probe ensures optimum combustion and maximum fuel utilisation not only with selected wood on the test stand, but also in everyday operation.
Turbulent heat exchanger with simple cleaning
The hot gas only enters the cold section of the boiler following complete combustion. Once in the cold section, it transfers its heat to the boiler water, first while smoothly flowing through a long ash collection duct (7) and then turbulently through heat exchanger tubes equipped with turbulators.
The more turbulent the flow, the more the gas comes into contact with the tube walls, thus ensuring maximum transfer of heat to the boiler water. This ensures low exhaust gas temperatures and high efficiency. Pulling the cleaning lever about 10 times prior to opening the boiler to refill with fuel moves the turbulators up and down in the heat exchanger tubes. The resulting fly ash drops into the ash collecting duct, leaving the heat exchanger clean.
Induced-draught adjusts to the flue
Thanks to the induced draught concept, the entire interior of the boiler is under a negative pressure.
This means that no smoke or low-temperature carbonisation gases can escape from the boiler regardless of the phase of operation. The induceddraught fan accommodates every flue, even those with small cross-sections. Speed control and continuously adjustable dampers for combustion air make draught limiters in the flue virtually unnecessary. Setting a minimum exhaust gas temperature prevents condensate formation in masonry flues and allows the low-temperature capability of modern flues to be fully utilised.
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Boiler functionality
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Start-up
Checking water pressure, suitable fuel
Checking water pressure, suitable fuel Start-up
Check water pressure
With a log boiler, it is no trouble to glance at the pressure gauge daily or at least regularly. In houses with up to three storeys, the water pressure in a cold system should be between 1 and 2 bar, for a warm system between 1.5 and 2.5 bar.
Suitable fuel
The firewood must be air-dry, i.e. it must have dried for at least one year and have a
water
content under 20%. We recommend using halfmetre split logs with an average diameter of 10 cm.
8 - 10 cm
7 - 9 cm
The most common defects in a heating system, i.e. leaks and boiling over, result in a low water alert.
In the event of insufficient volume compensation, water is released via the safety release valve. Either the expansion tank is too small, the diaphragm in the expansion tank is torn or a tap or valve between the heating system and the expansion tank was shut unintentionally. In this case, open the valve or tap, remove the lever or hand wheel and attach it to the valve with a wire.
Water will generally need to be added after the radiators have been bled.
Minimum pressure
To establish the minimum pressure for a cold heating system (especially when the buffer is also cold from top to bottom), determine the height of the space requiring heating above the heating system's pressure gauge and add three metres. The result is the minimum pressure in metres. Dividing the metre value by ten gives you the minimum pressure in bar, as shown on most pressure gauges.
Return temperature at least 60°C
The boiler return temperature should be at least
60°C to prevent corrosive condensation of flue gases in the heat exchanger. The control system monitors the return temperature. If the boiler return temperature is too low, a warning appears on the display.
12 - 15 cm
13 - 16 cm
Boards may only be added between the logs and in no case should they be included in the first layer as they would block the burn-through opening in the grate.
Small pieces of firewood may only be used for heating if added as a minor component to the primary fuel. The smaller the pieces of firewood, the less of them should be added.
Wood briquettes measuring 6 cm to 10 cm in diameter in compliance with ÖNORM M 7135;
Germany: 1.BimSchV 15 July 1988 Fuel Class 4.
Only one oversized log per boiler filling
Only 1 oversized split log or 1 stump can be placed in the top layer, but no more. Complete burning may require 2 combustion phases.
Unsuitable fuel
Wet fuel with a moisture content in excess of 20% may not be burned as it results in condensation which can lead to corrosion of the boiler's fuel chamber walls. The following may not be burned: rubbish, paper and cardboard (only for start-up), wood dust from sanding, sawdust, wood chips smaller than thumb-sized, coal and coke, and fuels generally prohibited by local air quality regulations, such as railway sleepers, plastic-coated plywood, impregnated wood etc.
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Correct quantity of wood
Start-up
Correct quantity of wood
When not much heating is needed only place a small amount of wood in the boiler
Absorbing all the heat from a boiler fully loaded with wood would require buffer storage tanks larger than needed for winter operation and also larger than those normally installed. When less heat is required, i.e. for hot water in the summer, or during the evening shortly before the night set-back, only load the boiler with the amount of wood actually needed.
The table below displays the amount of wood needed for summer operation for different boiler sizes (= fuel chamber capacity), wood type, buffer volume and buffer charging status. Bear in mind that an "buffer top" temperature sensor that is installed too low reduces the usable volume.
If the living space already needs some heating, start with the amount of wood in indicated in the table below. To establish the correct amount, approach the fully charged buffer state slowly, adding one or two more logs every heating
Correct quantity of wood
cycle. If too much wood is loaded, an emergency shutdown of the boiler will occur. If the boiler overheats, the flow of air is stopped. The fire will go out, but the hot wood will continue to smoulder for a while and the unburned wood gas resulting from the lack of air will create tar deposits in the boiler and flue. This happening once or twice in an emergency is not a problem. However, if this situation occurs every day, the boiler's heat exchanger will become clogged with tar.
Note the energy density of the fuel
The energy content of 50 litres of wood briquettes corresponds to 100 litres of beech wood or 150 litres of spruce.
Current buffer charging status is shown in overview
The current buffer charging status in percent is shown in the boiler [Boiler] and buffer [Buffer] overviews. The buffer charging status is the average of the three buffer temperatures (top, middle, bottom) between 30°C (=0%) and 80°C
(=100%).
SH20, SH30
Maximum fuel load
Briquettes Beech Spruce
1/4
1/2
1/4
1/2
3/4
Full
1/4
1/2
3/4
Full
Buffer charging status
25%
20%
15%
10%
5%
0%
65%
60%
55%
50%
45%
40%
35%
30%
Buffer size
3,300 l 2,200 l
90% 85%
1,650 l
80%
1,100 l
70%
85%
80%
75%
70%
78%
70%
63%
55%
70%
60%
50%
40%
55%
40%
25%
10%
48%
40%
33%
25%
18%
10%
0%
30%
20%
10%
0%
0%
SH40, SH50, SH60
Spruce
Maximum fuel load
Beech Briquettes
1/4
1/2
3/4
Full
1/4
1/2
1/8
1/4
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Water pressure, heating lines, cleaning lever
Water pressure, heating lines, cleaning lever Start-up
Boiler start-up
Check water pressure
Before starting up, check the heating system's water pressure (see also page 10 ). In houses with up to three storeys, the water pressure in a cold heating system should be between 1 and 2 bar, for a warm system between 1.5 and 2.5 bar.
Open heating lines
If the system is new or has been out of operation for some time, verify whether the
return riser
mixing valve is in "AUTO" position and all
shut-off valves in the heating lines are open.
Keep ball valves completely open to avoid ruining the seals. Open valves by turning anti-clockwise, and then turn back 1/4 turn from the fully open position to relieve pressure on the valve stem.
Operate cleaning lever
With the insulation door still closed, clean the heat exchanger by
operating (10x) the cleaning lever
on the side.
Open insulation door, draught fan starts automatically
When the insulating door is opened, the draught fan starts automatically and the on/off button in the boiler overview shines green. The operating mode changes to "Insulation door open".
10x
12
Afterwards, leave the lever pointing towards the rear of the boiler. Then the turbulators remain in position in the water-cooled heat exchanger.
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Buffer charging status
Start-up Buffer charging status
Check fuel chamber
Use the poker to distribute ashes and charcoal evenly throughout the fuel chamber. In the panels,
the two upper openings for primary air must
be free. Also, the 3 burn-through openings in
the grate must stay open so that the fire reaches the combustion chamber during ignition.
Primary air openings
If the draught fan does not start, it has been deactivated by the safety temperature limiter due to boiler overheating and a corresponding warning appears on the display. The safety temperature limiter can be manually released as soon as the boiler temperature has fallen below 70°C.
Open fuel chamber door
The draught fan must be running before the fuel chamber door is opened so that any combustion gas can be extracted from the fuel
chamber. If the boiler has not safely cooled, no boiler doors may be opened without an operating draught fan. A sudden inflow of air in the presence of smouldering wood may result in an explosion.
Fuel chamber door
Burn-through openings
Check buffer charging status
Before starting the boiler, check the current
buffer charging status to avoid adding too much
wood. The table on page 11 shows how much wood should be added. The buffer charging status is shown in percent values in the boiler overview.
Combustion chamber door
The fuel chamber door is always closed during both start-up and heating operation. It is opened only when ash is removed from the boiler.
Pay particular attention to the
different energy
densities of the fuels.
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Adding wood
Adding wood Start-up
Place logs close together in fuel chamber
Add the required amount
of closely spaced logs
to the fuel chamber. Stack the logs instead of throwing them in at random. Always place the first layer of logs lengthwise.
Place only 1 oversized log on top
Only 1 oversized split log or 1 stump can be placed in the top layer, but no more. Two combustion phases may be needed for complete burning.
Adjust log over burn-through opening
Lift the bottom log above the burn-through
opening with the poker and place pieces of charcoal (from the fuel chamber) or small pieces of wood under it so that
the burn-through
openings in the grate remain clear. To make ignition easier, next to the log
on the left and right there should be a small gap separating it
from the neighbouring logs.
Brushwood, coarse wood chips or carpentry waste should be added only as a secondary fuel among the split logs
First place half of the required amount of logs in the fuel chamber (at least 3 layers). Then alternately add the secondary fuel (brushwood, coarse wood chips or carpentry waste) and additional logs.
The smaller the pieces of secondary fuel are,
the more logs must be added between them.
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Start-up
Ignition, closing doors
Ignition, closing doors
Ignite the fire with cardboard and newspaper
Place crumpled paper or a few pieces of cardboard in front of the first layer of wood and ignite it.
The draught fan sucks the flame over the tightly stacked logs, causing them to ignite more quickly.
For heavy, smooth hardwood, larger pieces of kindling may be needed for ignition.
Never use petrol, turpentine or similar
materials as an "ignition aid": risk of explosion!
Under no circumstances should brushwood, coarse wood chips or carpentry waste be used
for the bottom layer. Such fine material burns too quickly, resulting in incomplete combustion in the combustion chamber, which is still cold during start-up. As a result, soot builds up in the heat exchanger.
Close fuel chamber door, open ignition door
Close the fuel chamber door and then open the ignition door.
The
ignition door should be kept open after
ignition to monitor the progress of the fire. It should only be closed once the boiler's exhaust gas temperature has reached 100°C. How long it takes the fire to start depends on the type of wood used; rough spruce may need only 2 minutes, smooth beech may require 5 minutes until the required exhaust gas temperature of 100°C is reached.
If the boiler is not to be started up yet, close both doors and in the boiler overview,
press the on/off button
so that it shines red.
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Closing ignition and insulation doors
Closing ignition and insulation doors Start-up
At 100°C exhaust gas temperature, close ignition door and insulating door.
Once a few logs are burning well and the
exhaust gas temperature is over 100°C, close
the ignition door and the insulating door. The exhaust gas temperature is displayed in the boiler overview. At over 100°C, an arrow appears to indicate that the ignition door should be closed.
Avoid opening boiler doors unnecessarily
Avoid opening the insulating door and the fuel
chamber door unnecessarily in heating mode.
That disrupts the boiler control and increases fuel consumption. Also keep the ignition door and the combustion chamber door closed.
Never open the insulating door and the fuel
chamber door when the boiler is in "Calibrating
lambda probe" or overtemperature mode.
Completion of heating mode with ember burnout
Once the wood in the boiler has been burned
(residual oxygen content below 15% for more than
5 minutes) or the exhaust gas temperature falls below 80°C, the boiler automatically starts burnout
("Ember burnout" mode). If the
de-ash button
was not pressed, the boiler frees the secondary air ducts of ash with fresh air.
Charcoal and
embers remain in the boiler by design so that newly added wood can be ignited more easily.
Complete ember burnout for cleaning
For cleaning after the last heating operation, in the overview
press the de-ash
button (which then shines green).
When the insulating door is closed, the boiler automatically switches to ignite mode and, once the residual oxygen content is below 15%, to heating mode. The boiler is now in heating mode and regulates the combustion of the wood independently.
Ember retention is then deactivated and the boiler performs a complete ember burnout (duration
~1 hour), burning most of the charcoal in the fuel chamber to make subsequent cleaning of the boiler easier.
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Start-up
Adding fuel
You should
only add fuel when the buffer
charging status is below 30% and the fuel
chamber has burned to empty.
If wood has been added and there are still embers in the boiler, it automatically tries to ignite the wood again. If the wood is hard to ignite and there are only a few remaining embers, it may help to push the charcoal together in the middle before refilling. If the remaining embers do not ignite the wood, light it with paper and cardboard through the ignition door.
Adding fuel
Adding fuel
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Safety
Safety devices to prevent overheating
Safety devices to prevent overheating Safety
Safety devices to prevent overheating
The following safety chain takes effect if the boiler exceeds the operating temperature for any reason:
• over 87°C -> pump safety run
• over 90°C -> draught fan switched off
• over 95°C -> thermal emergency cooling valve
• over 105℃ -> safety temperature limiter
• over 3 bar water pressure -> safety valve
Pump safety run
If the boiler temperature exceeds 87°C (=factory setting [Pump safety run]), the pump safety run starts.
All heating pumps and boiler pumps that are connected to the boiler control are
switched on to dissipate heat from the boiler.
This action prevents the boiler temperature from rising further and triggering further safety devices such as the safety temperature limiter and thermal emergency cooling valve. This emergency cooling is indicated on the display by "heat dissipation".
The heat dissipation is limited with the
maximum flow temperature set in the
heating circuits and the hot water setpoint
temperature.
Boiler overheating
If 90°C boiler temperature (factory setting [Boiler max.]) is reached,
the control system switches
the draught fan off and a warning message appears on the display. Reasons for a boiler temperature increase include:
• too much wood added (see page 11 )
• heating circuits unexpectedly switched off
• heating pump failed
• heating line inadvertently shut off
Once the boiler temperature has fallen below 86°C, heating resumes automatically.
During such emergency shutdowns
the wood
continues to emit gas and the unburned wood
gas causes tar deposits in the boiler and
chimney.
Thermally actuated drain valve (to be supplied by technician)
Independent of the other safety devices, the thermal emergency cooling valve
is non-electrically triggered at boiler temperatures between
92°C and 97°C. The thermal emergency cooling valve is opened by means of a sensor system containing a liquid that expands when heated (no electricity required). It causes the
boiler's safety heat exchanger to be flooded with drinking
water, dissipating the excess heat out of the boiler into the sewer.
If the thermal emergency cooling valve activates frequently, check whether it activates at a temperature below 92°C and replace it if necessary.
Safety temperature limiter
For additional safety against boiler overheating, a
safety temperature limiter is built into the boiler.
When a boiler temperature of 105°C (tolerance
100°C to 106°C) is reached, the
power supply to
the draught fan is switched off.
If the boiler temperature falls below 70°C, the safety temperature limiter can be manually reset.
The reset button is recessed into the door frame above the fuel chamber door. To reset, press it deeply into the recess.
Safety temperature limiter
Safety valve against excess pressure (to be supplied by technician)
The most common cause of safety valve activation is either an undersized expansion tank or heating lines that have been shut off. The safety valve also serves as a backup safety device to prevent boiler overheating in the event that all other devices in the safety chain fail.
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Safety
The
safety valve must be installed in the flow
line right where it leaves the boiler, as it cannot dissipate any heat if installed in the return line.
In rare cases when neither the thermal emergency cooling valve nor the safety temperature limiter trips, the pressure and temperature will increase until the safety valve opens. If this occurs, it is crucial to check that the thermal emergency cooling valve and the safety temperature limiter are working properly. If cold water is drawn from an on-premises well with its own pump, a power failure may be the reason for failure of the thermal emergency cooling valve. If this occurs frequently, a larger air chamber in the building's water supply or a separate air chamber for the thermal emergency cooling valve is required.
Safety devices to prevent overheating
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Maintenance
Overview of activities
Overview of activities Maintenance
Regular cleaning and servicing
To ensure that the boiler operates optimally and reliably, it must be cleaned and serviced at regular intervals.
Maintenance and cleaning of the boiler must be performed within the specified periods (see table).
Cleaning and maintenance overview
The table provides an overview of the required cleaning and maintenance.
The "To be done by" column indicates which activities you as customer can deal with and which must be performed by an expert.
Activity
Operate cleaning lever
Check water pressure
De-ash boiler
Check walls of ash collection duct
Check safety valves and thermal emergency cooling valve
Clean casing and display
Remove ash behind panels
Clean primary and secondary air duct
Check and clean flue tube
Clean heat exchanger box
Check turbulators for tar deposits
Clean draught fan
Check safety valves
Check door seals
Check safety devices
Clean the lambda probe
Inspect seal on heat exchanger cover
Perform emission measurement
Calibrate lambda probe
Perform heating test
Reset maintenance counter
Every 1 - 2 weeks
X
X
X
X
X
X
Frequency
Annual maintenance
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Every
3 years
X
X
X
X
X
X
X
X
X
X
X
X
To be done by
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Customer
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Each time the boiler is filled
Maintenance
Operate cleaning lever
The heat exchanger's cleaning lever must be operated 10x before every boiler start-up.
10x
Each time the boiler is filled
Check water pressure
In houses with up to three storeys, the pressure in a cold system should be between 1 and 2 bar, for a warm system between 1.5 and 2.5 bar.
If the boiler pressure is too low, fill the cold heating system to approx. 2.0 bar. This will keep the pressure below the activation pressure of the safety valve (3.0 bar) even though it rises when the water expands with increasing temperature while heating up to operating temperature.
Afterwards, leave the lever pointing towards the rear of the boiler. Then the turbulators remain in position in the water-cooled heat exchanger.
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Every 1 - 2 weeks
Every 1 - 2 weeks Maintenance
De-ash boiler
Perform complete ember burnout
During final heating operation, in the overview
press the de-ash
button (which then shines green).
Scrape ash and charcoal from fuel chamber into combustion chamber
The insulating layer of ash in the fuel chamber is necessary for ember retention, so there should be
approximately 5 cm of ash left in the fuel
chamber. Scrape the remaining ash from the fuel chamber into the combustion chamber. Some pieces of charcoal will drop into the combustion chamber during this process; these are best left there. The charcoal will burn during the next combustion cycle and the ash will protect the bottom of the combustion chamber against premature wear.
Ember retention is then deactivated and the boiler performs a complete burnout (duration ~1 hour), burning most of the charcoal in the fuel chamber.
Clean combustion chamber and ash collection duct
Once the boiler has cooled off, rake the ash out of the fire box and the ash collection duct into the ash collection pan. The rear end of the ash collection duct must also be cleared out so that there is no ash in front of the lambda probe head. If the draught fan is running while you are removing the ash, remove it from the boiler slowly and gently to avoid stirring it up too much and having it blown out through the flue.
Combustion chamber
No embers in the rubbish bin
If there are still embers in the ash, leave the ash in a closed, non-flammable container for at least 2 days. Only put it in the rubbish bin when there are really no more embers present.
Do not slide the ash collection pan into the boiler
Although the ash collection pan can be pushed into the ash duct of 40 - 60 kW boilers, it is not intended for this purpose and would be destroyed by the high temperatures there.
Ash collection duct
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Maintenance
Check walls of ash collection duct
The walls of the ash collection duct
may be white
to brown in appearance. If they are black with soot, either too much wood was burned at too low a heat consumption ( page 11 ), the fire was not lit correctly at start-up or, in very infrequent cases, the lambda measurement gave incorrect values.
Every 1 - 2 weeks
Clean casing and display
Clean the boiler casing with a damp cloth and
(if necessary) a commonly available household cleaner (no scouring agents). Clean the display only with a damp cloth (no cleansing or scouring agents).
Check safety valves and thermal emergency cooling valve
The safety valve and the thermal emergency cooling valve
may not drip. Dirt may be stuck in the seal seat.
Safety valve
Thermal emergency cooling valve
Only perform further steps on weekdays, never check on weekends in a cold winter as there will probably be no heating technician available if the seal is defective. If the valve drips, open the safety valve with a quarter turn of the red cap and rinse it out (danger of scalding). If the valve still cannot be closed tightly after being rinsed several times, it must be cleaned by a plumber or replaced.
If a solar heating system is to be connected to the buffer storage tank, the safety valve installed there must also be inspected.
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Annually
Annually Maintenance
Annual maintenance
In preparation, perform weekly maintenance
Before annual maintenance, all steps of the weekly maintenance must be performed.
Before starting work, let the boiler cool off and switch it off with the mains switch.
Remove ash behind panels
The panels are hung from a bolt at the top. Lift the panels slightly, pivot them out and remove them from the fuel chamber. Remove the ash behind them.
After removing the front panels, remove the guard plate between the fuel chamber and ignition doors so it cannot fall down.
Clean secondary air openings
Remove both parts of the grate and remove the ash beneath them. Then
remove the ash from
both secondary air openings at the sides.
When inserting the grate, take care that the seal
(above the secondary air opening)
is in the semi-
circular groove on the grate.
Panels
Guard plate
Clean primary air openings
The openings for primary air are behind the panels around 10 cm above the floor of the fuel chamber. Clean these openings with a vacuum cleaner.
Check and clean flue tube
Check that the flue tube from the boiler to the chimney is
air-tight. The points at which dust or flue gas escape can be identified by discolouration.
The exhaust gas pipe can be sealed with heatresistant silicone (400°C) and aluminium sealing tape. Since there are many different alternatives for connecting the exhaust gas pipe to the chimney, it is best to consult the chimney sweep regarding leaks in the connection.
Flue pipes with a horizontal run longer than 1 metre must be brushed out.
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Maintenance Annually
Clean heat exchanger box
Open the heat exchanger cover (at the top of the boiler in front of the exhaust gas pipe) and
remove
the ash from the heat exchanger box with a vacuum cleaner. Do not close the chamber again until the draught fan has also been cleaned.
Clean draught fan
Disconnect the power supply, remove the 3 wing screws and pull out the fan. Clean the fan wheel with a soft brush, toothbrush (no wire brush) or compressed air so that the motor shaft does not get bent.
If there
are tar deposits on the draught fan's
wheel, that is a sign that too much wood is always being added (see table on page 11 ), or the lambda probe is defective and providing false measurements.
Check turbulators for tar deposits
Check the turbulators in the heat exchanger for
tar deposits.
The turbulators must be removed as soon as
the cleaning lever becomes difficult to move.
If the turbulators and their supporting brackets have tar deposits, the cause is often the addition of more wood than is needed to meet the actual heating requirements (see page 11 ).
SH Operation
Check seal
Before installing the draught fan,
check the
seal. Make sure that the plug connection on the installed draught fan is pointing to the right (as seen from the back of the boiler).
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Annually Maintenance
Check door seals
Check the seals on the 3 boiler doors (fuel chamber door, ignition door, combustion chamber door). The door handles must close firmly (with force), and the sealing edges of the door frames must leave a clear impression on the sealing cord.
In particular, check the seal between the carbonisation gas extraction duct and the fuel chamber door.
0.5 - 1 mm
The boiler door hinges are adjusted in the same manner. Loosen the two hexagonal nuts next to the hinges and move the mount by 0.5 - 1 mm towards the rear of the boiler.
Leaks can be identified by variations in the colouring on the seal or by using a cigarette lighter while the draught fan is running. The flame will be drawn toward the leak. If leaks are found, it is usually sufficient to
adjust the hinges and the
closing roller mount. It is not always necessary to replace the sealing cords.
To adjust, open the door and lift it from its hinges.
Loosen the two hexagonal nuts next to the closing roller mount and move the mount by 0.5 - 1 mm towards the rear of the boiler.
0.5 - 1 mm
Then tighten the hexagonal nuts, reattach the boiler door and check that it closes tightly.
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Maintenance Annually
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Every 3 years
Every 3 years Maintenance
Maintenance by expert, every 3 years or after alert by control system
In preparation, perform weekly and annual maintenance
Before this maintenance, all steps of the weekly and annual maintenance must be performed.
Before starting work, let the boiler cool off and switch it off with the mains switch.
Check safety devices
Check safety valves, thermal emergency cooling valve and safety temperature limiter
See page 23 .
Clean the lambda probe
Use a pipe wrench to unscrew the lambda probe's retaining tube.
Clean the
lambda probe's seal seat in the boiler.
It must be absolutely clean. Inspect it with a torch and clean out the coupling with a vacuum cleaner.
Clean
The copper washer for sealing the lambda probe's metal flange and the seat in the boiler must be replaced when installing the probe.
Tighten the lambda probe securely (with 20 kg and
20 cm lever arm).
28
Let the lambda probe cool off and clean it with a vacuum cleaner. Take special care to clean the openings in the head of the lambda probe.
Excessive wear on the combustion chamber is often due to leaky installation of the lambda probe. Leak air penetrates the boiler and the control system reduces the air intake too much and the temperatures in the combustion chamber reach forbidden levels.
Inspect seals on heat exchanger cover
Check the heat exchanger cover's seals and replace as needed.
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Maintenance Every 3 years
Calibrate lambda probe
After every 500 hours of full-load operation, the boiler performs an automatic calibration of the lambda probe. This always occurs after an ember burnout and only at night between 23:00 and 04:00. This calibration can also be initiated manually by opening the primary and secondary air valves and flushing the boiler with fresh air using the draught fan.
If the boiler has not been in use for over 48 hours, this calibration takes only 30 minutes. If the boiler was in operation until recently, the calibration can take up to 3 hours. If the boiler is started up during calibration, the calibration is aborted and started again 9 days later.
Using the Service access level, open the text menu by pressing [Boiler] and . Tap the [Inputs] line.
In the submenu, tap the [Residual O2] line.
In the submenu, scroll down and double-tap the
[Additional calibration] line.
2 x
In the selection window that appears, select
[On] button and confirm with [Accept]. The control system will now automatically calibrate the lambda probe. The boiler is now in
Calibrating lambda probe mode. When calibration is complete, the boiler returns to "Ready" status.
After 100 hours at full load, the control system will automatically perform a re-calibration.
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Every 3 years Maintenance
Perform emission measurement
Perform the emission measurement with a measuring device on the boiler; see page 6 .
Perform heating test
Place logs in the fuel chamber, ignite them and wait 15 minutes. Then switch the boiler to emission measurement mode by pressing .
The control system ensures that sufficient heat is channelled to the buffer, the heating circuits and the hot water tank.
After around 10 minutes, a
residual oxygen value
of 4.5 to 7% should be reached. The current residual oxygen content is displayed in the boiler's text menu under [Boiler] at [Residual O2].
If the value
does not drop below 12% residual
oxygen, the boiler is receiving leak air. The reason (leaky boiler doors, heat exchanger cover, lambda probe installation etc.) must be identified and corrected.
Reset maintenance counter
After expert maintenance, the maintenance counter must be reset to zero. "Service" level access is required to do this.
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SH Operation
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Approval, antifreeze, pressure equalisation, venting
Approval, antifreeze, pressure equalisation, venting
Approval
Every heating system must be approved.
Inquire at you building authority and ask your chimney sweep.
Operation only by trained personnel
The system may be operated only by trained personnel. Instruction can be given by the heating installer or our customer service. Please read this user manual to be assured of avoiding errors in operation and maintenance of the boiler.
Fire extinguisher
In Austria at least a powder extinguisher ABC 6 kg is required. Better is a foam extinguisher AB 9 litre, which causes less damage when extinguishing.
The fire extinguisher should be kept outside the boiler room, easily visible and easily accessible.
In Germany and Switzerland, no fire extinguishers are required for heating systems in private residences. In spite of this, we recommend having one in the house.
Children must be kept away from the boiler room and pellet store.
Antifreeze
If a house with average insulation is unoccupied in winter at low temperatures for more than five days, check once a week (twice a week for very low temperatures) to make certain that the boiler is operating properly.
If the building is unoccupied in winter for longer intervals, up to 30% antifreeze can be added to the heating water. To compensate for the disadvantage of reduced heat capacity and increased flow resistance, only slightly higher flow temperatures are needed.
Insulate contact sensors
If the pipe in the vicinity of a contact temperature sensor is not insulated (e.g. in externally installed heating circuit groups), lower than actual temperatures will be measured. For this reason, pipe insulation may not be recessed or weakened for heating circuit flow sensors. For uninsulated piping systems, the measurement area must be insulated with mineral wool at least 20 mm thick over a length of at least 20 cm of pipe.
Pressure equalisation
For pressure equalisation in the system, a diaphragm expansion tank with a gross capacity of around 10% of the system volume is needed (see conditions for guarantee and warranty).
All shut-off valves along the path from the expansion tank to the boiler and to the buffer storage tank must be capped valves, or the hand wheels or levers must be removed from the valves
(hang on the valve with a wire) to ensure that they cannot be closed by accident.
If the pressure difference between cold and warm heating system (buffer fully loaded if installed) is greater than 1.0 bar for a single-floor system or 0.5 bar for a three-storey system, then the expansion tank is too small and absolutely must be replaced with a larger one. If the installed expansion tank is not large enough, the system sucks in air when cooling and the air is absorbed by the cold water and transported to the boiler.
At the point of highest temperature, the air separates from the water again. This is the usual situation in the boiler, and the inevitable result is that the boiler wall will rust through at these places.
Venting
Automatic venting valves in the boiler outlet, at the highest point in the distribution network and at the top of the buffer significantly reduce the danger of rust and also the frequency of radiator venting.
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Softened water, safety valve
Initial fill-up with softened water and enough shut-off valves
All relevant standards demand softened water for heating systems with larger water volumes.
For the boiler a value of 20,000 lt°dH for system volume in litres multiplied by the hardness
(in degrees of German hardness) may not be exceeded.
A system volume of 300 litres (boiler and heating elements) and very hard water with 30°dH yields a value of 9,000 lt°dH. In this case, the system can still be filled with unsoftened water.
For a heating system with a 1000-litre buffer, for example, the total volume is 1300 litres. Even with water that is not very hard, such as 20°dH, a value of 26,000 lt°dH results; that is too high. For a volume of 1300 litres, the water must be softened to less than 15°dH (20,000 divided by 1,300).
Around 0.25 kg of limescale will precipitate from a cubic metre of water with 15°dH, resulting in a limescale layer 0.2 mm thick on a quarter of a square metre of the boiler's heat exchanger surface; this small area in the boiler is where the lime build-up is concentrated. This may not seem serious, but with 2 m³ of buffer storage and a system volume of 0.5 m³, a thickness of 0.5 mm is reached. Thicker layers hinder the heat flow through the boiler wall to the extent that it is no longer cooled sufficiently and heat stress cracks can form.
In practice, that means the boiler can tolerate a buffer filled with unsoftened water as long as no repairs and no leaks in the system (defective air valves or safety valves that fail to close) force water to be refilled during the further course of the system's service life.
To have a sufficient safety reserve for additions, the new system must be filled with softened water, meaning that the empty system must really be filled exclusively with softened water before starting the boiler for the first time. Changing the water after the boiler has already been in operation is too late since the limescale from the unsoftened water has already precipitated in the boiler.
To reduce the amount of water replacement for later repairs, it must be possible to shut off all large volumes such as buffers, boiler and heating circuits to keep the lime content to a minimum during water additions.
SH Operation
Softened water, safety valve
Protection against corrosion
To limit corrosion with softened water, the pH value should be adjusted to between 8 and 9 using suitable inhibitors (trisodium phosphate).
Safety valve against overpressure
Install a safety valve with 3 bar opening pressure on the boiler (is already installed for PU and
PC boilers). No shut-off valve may be installed between the boiler and the safety valve. If solar or other heat sources provide energy to the buffer storage tank via a heat exchanger, a safety valve
(3 bar maximum) is also required on the buffer storage tank. Normally an expansion tank that is too small or defective, or blocked heating lines, are the cause for activation of the safety valve.
The safety valve must be on top of the boiler in the flow in order to also discharge heat in an emergency. Only this way can it discharge heat when it blows out hot water and also steam.
The discharge must be directed to the sewer via an easily visible, open flow path (siphon funnel) so malfunctions and, above all, a non-closing valve can be recognised. If no sewer is available, the discharge must be directed into the ground in a pipe so nobody is endangered by hot water or steam.
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Return riser and safety devices
Return riser and safety devices
Return riser
Wood contains water. If the temperature in the boiler is too low, steam condenses from the flue gas onto the heat exchanger surfaces. Corrosion and a leaky heat exchanger are the result. To prevent this, the water temperature at the boiler inlet must be at least 60°C. Since the return temperatures are usually lower, a return riser is needed - preferably with a mixer that provides controlled, heated flow to the boiler return.
The return riser mixing valve controls the buffer charging output. To reduce the output, the return temperature is raised over 60°C to reduce the spread compared to the boiler's setpoint temperature. With the spread the output that can be consumed from the boiler is limited.
Thermal emergency cooling valve against overheating
The safety heat exchanger built into the boiler must be connected by the heating technician to the house's cold water supply via a thermal outlet valve (opening temperature 95 °C) to protect the boiler against overheating if the pump fails. The minimum pressure in the cold water line must be
2 bar.
Connect the supply line to the lower connector of the safety heat exchanger; the upper connector is for outlet to the sewer. To prevent the supply line from being shut off accidently, remove the levers from shut-off valves or the hand wheels from valves and hang them there with a piece of wire.
The discharge must be have an easily visible, open flow path so malfunctions can be recognised.
Direct the discharged water to the sewer via a siphon funnel or at least with a pipe into the ground so that nobody can be scalded if the valve is activated.
Even for cold water coming from a domestic well with its own pump, a thermal emergency cooling valve must be installed on the boiler. With a generously dimensioned air vessel, enough water for cooling will come even if there is a power failure. If the electricity supply is very uncertain, a dedicated air vessel for the thermal emergency cooling valve is required.
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Minimum heat consumption, buffer storage tank
Minimum heat consumption, buffer storage tank
A minimum power level is necessary to achieve clean and complete combustion
The smaller the fire in the boiler, the lower the temperature will be in the combustion chamber.
At about a third to a quarter of the full load, the combustion temperature drops below 700°C and the tar components in the wood gas no longer burn completely. This drastically reduces the efficiency (it can drop to below 50%), causes tar build-up in the boiler's heat exchanger and in the chimney and also results in unacceptable pollution due to unburned hydrocarbons.
To maintain a clean-burning wood fire with maximum fuel efficiency, a minimum power level must be maintained and the best way to achieve this is to use a buffer storage tank.
Why a buffer storage tank?
Many old log boilers that do not have buffer storage tanks are still in use, so why do we need them with today's wood-burning systems? The answer to this frequently asked question is as follows: In the days before heating control systems, the boiler used the thermal mass of the entire house as a buffer. If the boiler is replaced, and the radiators are fitted with new thermostat valves and/or a weather-dependent mixing system, the log boiler is forced to operate at too low an output level in autumn and spring when the heating requirements are minimal. At low output levels, the temperature in the combustion chamber drops, but production of wood gas doesn't. Hard-to-burn components of the wood gas, such as tar or acetic acid no longer combust; instead, they condense
(create tar deposits) either in the boiler's heat exchanger or in the flue. The materials that are not deposited pollute the environment.
A buffer storage tank is necessary to control this low-load operation, which inevitably occurs with a modern, energy-saving heating system. Heat produced by the boiler for which there is no immediate use within the building is offloaded into a buffer storage tank and retrieved by the heating system as needed, for example, when the boiler is not operating.
As a log wood boiler cannot simply be switched off once it has been started up and while there is still wood burning in it, it must be possible to store in the buffer the energy content of the wood that is still in the combustion chamber. to hot water tank
Flow from boiler
" Buffer top" temperature sensor just under the connection
The boiler controls its output based on the reading from the "Buffer middle" temperature sensor.
Enough to provide sufficient heat to start a consumer. Not too much to ensure that the buffer is still able to store heat after the heating circuits have been switched off.
" Buffer bottom" temperature sensor just above connection
Return to boiler
No external timer thermostats
The factory-standard controls include weekly timers for two heating circuits.
If the heating pumps are controlled by the boiler control, heat can be drawn from the boiler during periods when the temperature setting has been lowered as long as there is wood in the boiler.
This is especially important if you accidentally put too much wood on in the evening, or if you intentionally heat up the boiler to its full extent in anticipation of a cold night.
Timer thermostats will switch off the heating pumps punctually at the preset time, even if wood is still burning in the boiler, and even if the
(undersized) buffer is incapable of storing more heat. The only solution for the boiler is to stop its air intake. Although this puts the fire out without the boiler overheating, the wood will continue to emit gas and the unburned wood gas resulting from the lack of air will create tar deposits in the boiler and flue.
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Split wood will dry out in just one summer
Split wood will dry out in just one summer
Why use dry split logs?
The moisture content of split logs intended for a log boiler should be below 20% (air dry).
Damp wood with a moisture content of above 20% creates a moist climate in the fuel chamber. Wood that is not sufficiently dry can cause the boiler's fuel chamber to rust through.
One summer is sufficient to dry out split firewood
Unsplit logs stacked as metre-long pieces in the forest will generally take two summers to dry.
However, it can be done faster. If the timber is felled in winter (before the end of January) and split immediately, a moisture content of 15% can be reached by September through air drying. Split logs also burn far better than unsplit logs.
Unsplit logs take two months longer, and thus a second summer, to dry.
The best approach is to split the wood in lengths of 1 m immediately after felling: split in half for a log diameter of up to 15 cm; into quarters for a diameter up to 20 cm, into sixths for a diameter up to 25 cm, and into eighths for a diameter up to 30 cm.
Store the split wood in a windy place on a dry surface; ideally stack crosswise on two logs or concrete pipes and cover only the top. Of course a sunny location is preferable, but it is more important to find a dry, windy place. Leave a gap between stacks as well. If you stack wood along the wall of a house, leave an air gap of at least 10 cm between the wall and the stack of wood.
Wood stored outside in winter will absorb moisture from precipitation. For this reason either move the wood to a covered location in September or, as a minimum, temporarily store it in a warm room for a week before burning.
During storage the heating value is reduced by processes similar to decay; depending on how dry storage conditions are, the loss can be between
1% and 3% per year. For this reason, only store firewood for longer than 3 years in exceptional circumstances.
Split the wood and store it in a dry, windy place, one percent moisture more or less will not make a big difference
To sum up: the heating value changes by only 2% between 20% and 10% moisture content. It is easy to achieve less than 20%—even if you cut the wood in summer—if you split the wood and store it outdoors with protection against the rain for a year.
36
60
%
50
40
30
Buche
Fichte
20
Buche
Fichte
10
0
De z0
2
Feb
03
Ap r03
Jun
03
Au g0
3
Ok t03
De z0
3
Feb
04
Ap r04
Jun
04
Au g0
4
Ok t04
Quelle: “Rationelle Scheitholzbereitstellungsverfahren” Bericht 11 TFZ Straubing, von ETA mit Heizwertangabe ergänzt
82,4
%
89,0
93,5
96,6
97,7
99,0
100,0
100,9
101,7
102,4
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Heating value of wood
Heating value of wood
Heating value of wood
Split wood is typically sold in stacks by the cubic meter. The energy content depends not only on the type of wood. The amount of heat a cubic metre contains also depends on whether the wood is unsplit round logs, metre-long split logs, or readyto-burn split logs, and on whether it is fresh from the forest or dried for firewood.
The wood volume stays constant from when it is freshly cut with a moisture content of 60% to the fibre saturation point at 25%. The wood starts to contract if dried below this point. It reduces in size, and this is why air-dried wood (moisture content of 15%) has more wood substance than freshly cut wood per cubic metre. The difference is typically 5% to 6% for softwood, and 6% to 9% for hardwood.
Logs are not straight. The longer the logs are, the less wood and the more air is present per cubic metre. There is typically more air in "crooked" hardwood than in "straight" softwood.
There is one further difference: round logs can typically be stacked in a far more compact way than metre-long split logs. If you split the wood yourself, buying round logs will give you up to
15% more wood per cubic metre.
In practice, deviations on the order of +/-10% compared with theoretical values are to be expected. Up to 20% is possible in extreme cases: not only if the wood is particularly straight or crooked, but also because the density of the wood mass itself can vary.
Incidentally, if you order a cubic metre of ready-toburn beech firewood as 50 cm split logs from your wood dealer, the dealer is entitled under current law to supply 0.85 m³ of half-metre split logs cut from 1 m³ of 1 metre long split logs. To avoid any unpleasant surprises, when ordering ask how your dealer measures a cubic metre (if the price is good, you may find 0.85 m³ acceptable).
Estimating your wood requirements
Each kilowatt of heat output requires 0.9 cubic metres of half-metre split beech logs, or 1.3 m³ of split spruce per year.
In other words, 8 m³ of half-metre split spruce logs or 5.5 m³ of beech will replace 1000 litres of heating oil.
Energy content of one cubic metre of wood in kilowatt hours
The table assumes that the firewood used is split and air-dry (after one year's storage) with a moisture content of around
15% when burned even if it was moist when bought.
Softwood
Fir
Spruce
Douglas fir
Pine
Larch
Hardwood
Poplar
Willow
Alder
Maple
Birch
Ash
Oak
Beech
Hornbeam
Black locust
Round logs 1 m freshly cut w=30-60%
1 stere contains 0.65 m³
1,205
1,299
1,402
1,542
1,573
Round logs 1 m dry w=15%
1,269
1,373
1,478
1,625
1,656
1 stere contains 0.59 m³
958
1,107
1,191
1,472
1,475
1,658
1,664
1,655
1,743
1,743
1,020
1,200
1,270
1,550
1,570
1,760
1,760
1,800
1,920
1,920
Logs 1 m freshly cut w=30-60%
1,038
1,119
1,208
1,329
1,355
1 stere contains 0.50 m³
812
938
1,009
1,247
1,250
1,405
1,410
1,403
1,477
1,477
Logs 1 m dry w=15%
1 stere contains 0.56 m³
1,093
1,183
1,274
1,400
1,427
864
1,017
1,076
1,314
1,331
1,492
1,492
1,525
1,627
1,627
Logs 50 cm freshly cut w=30-60%
Logs
50 cm dry w=15%
1 stere contains 0.62 m³
1,149
1,239
1,337
1,471
1,501
1,210
1,310
1,410
1,550
1,580
1 stere contains 0.59 m³
958
1,107
1,191
1,472
1,475
1,658
1,664
1,655
1,743
1,743
1,020
1,200
1,270
1,550
1,570
1,760
1,760
1,800
1,920
1,920
Logs 33 cm freshly cut w=30-60%
Logs 33 cm dry w=15%
1 stere contains 0.64 m³
1,186
1,279
1,380
1,519
1,549
1 stere contains 0.62 m³
1,007
1,163
1,252
1,547
1,550
1,742
1,749
1,739
1,832
1,832
1,249
1,352
1,455
1,600
1,631
1,072
1,261
1,335
1,629
1,650
1,849
1,849
1,892
2,018
2,018
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User interface
Adjusting the date and time
Adjusting the date and time
Getting to know the control system
Instead of buttons, the touchscreen is operated using icons directly on the screen.
In order to familiarise yourself with how to operate the system, tap once on the icon on the left of the screen.
The touchscreen only displays those function blocks that are required and configured to work with your heating system.
You can use the horizontal buttons [Boiler],
[Buffer], [HC], [HWT] ... to flick between the individual function blocks (FUBs).
These instructions contain descriptions of all the function blocks of the ETAtouch software.
User interface
Adjusting the date and time
Tap on the date or time at the bottom right-hand corner of the touchscreen.
A screen appears for adjusting the date and time:
Moving on the touchscreen
Use the horizontal buttons to select the individual
function blocks (FUBs) of the heating system.
Overview
of the selected function block.
Text menu
for adjusting the parameters of the selected function block
I/O list
allowing experts to assign inputs and outputs
Error messages
for the selected function block
Toolbox
for experts
INFO
Help
Tap on the [Day], [Month], [Year] or [Time] fields to alter the settings.
Once a field has been filled in by entering numbers, the cursor automatically moves to the next field.
[DEL] deletes the number to the left of the cursor.
[Cancel] closes the screen without saving the changes.
[Accept] saves changes and closes the screen.
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Changing the language
User interface
Changing the language
It is possible to change the language on the screen.
Changing the language
Switching to the toolbox
Press the button to switch to the toolbox.
Selecting a language
Select the language you require and confirm by pressing the [Accept] button.
Tapping the button with the flag symbols
Tap the button with the flag symbols to go to the language selection screen.
Back to overview
Press to return to the boiler overview screen.
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Changing function block names
Changing function block names
Changing the names of the function blocks
The names of the function blocks can be changed at any time in order to make them clearer to you.
For example, the names of the heating circuits HC,
HC2 etc. can be changed to ground floor, upper floor, parents, living room or similar.
Example: Renaming HC1 "Ground floor"
Even though this example uses a long name, it is best to choose short names so that you can reach all the function blocks without having to use the arrow buttons.
Selecting heating circuit 1
Double-tap [HC] to rename this function block.
2 x
Changing the name using the keyboard cancel
User interface
save
Use the keyboard to enter the new name for heating circuit 1, in this example: FLOOR.
Then press the [ENTER] button to save the new name.
The [ESC] button cancels the renaming process and changes back to the previous name.
HC has now been renamed "FLOOR".
The names of all the function blocks can be changed at any time.
A small screen appears for this function block.
40
Tap the [Change Name] button. An on-screen keyboard appears.
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Alarm, error, warning, message
User interface Alarm, error, warning, message
Message
This icon in the function block buttons indicates a message. Messages do not interrupt operation of the boiler, nor must they be acknowledged.
For example, they may indicate that the cleaning lever should be operated or inform the user of events outside normal operation, e.g. in summer, the pump anti-blocking protection begins every Saturday at noon.
Warning
This icon indicates a warning. Warnings are issued when a function that is not essential to active operation fails. A warning can be acknowledged before the error is resolved. However, it will continue to be displayed until the cause of the error has actually been dealt with.
Error, alarm
This icon indicates errors or alarms. Alarms are issued for errors that halt operation. Some can be acknowledged before the error is resolved. However, they continue to be displayed until their cause has actually been dealt with.
Some errors and alarms cannot be acknowledged until they have been successfully resolved. These messages can be deleted with the [Confirm later] button.
Displaying errors
Press to view the list of errors for the currently selected function block.
If an error, alarm or warning occurs in any
function block, the icon on the button changes to (alarm) or (warning).
By selecting a line, you can view a help text at the bottom of the screen.
Acknowledging errors
Select the line and
double-tap it or press [Conf.].
A confirmation window appears.
Press "OK" to acknowledge the message and delete it from the list. Press [Cancel] to close the window without acknowledging the error.
or
2 x
Acknowledging all errors
Double-tap a function block to display a menu where you can acknowledge all errors by tapping
[Confirm error].
!!! Restart after an alarm !!!
Once the errors have been resolved and the errors and alarms have been acknowledged, the boiler or the affected heating circuit must be switched back on using the on/off button .
Once they are switched on, the button lights up green.
2 x
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41
Opening the text menu
Opening the text menu
Function block text menus
There is a "text menu" for each function block. This view shows the current parameter settings. It also allows the user to make changes.
Opening the text menu
Select the desired function block, e.g. by tapping
[Boiler]. Next, change the view to "text menu" by pressing the button.
The text menu for the selected function block appears. The individual parameters for the selected function block are displayed.
Lines preceded by have a submenu, which can be opened by tapping the line. The submenu can be closed again by tapping the upper-level line that is marked with .
Modifying parameters
It is possible to modify certain parameters in order to adapt the heating to your needs. Tap these parameters to select them. The [Value] field changes and the [Change value] button appears.
Change the parameters by double-tapping on the line, or
select the line and press the [Change value] button.
User interface
Example: Displaying the boiler counters
Tap the [Boiler] button to open the "Boiler" function block.
From the overview screen, press the button to go to the text menu.
The boiler text menu appears.
Tap the [Counters] line. The submenu opens and the boiler counters are displayed.
or
2x
In case of doubt, consult an expert before making any changes.
Only modify parameters if you know what their function is. Read through the corresponding section of the user manual before making changes.
If the explanation of the relevant function given in the manual is not sufficient for your purposes, confer with an expert.
Press the button to return to the overview.
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Log boiler [Boiler]
Overview, buttons, functions
Overview, buttons, functions
Boiler overview
Press and [Boiler] to open the Boiler overview screen. The overview screen shows you the boiler mode and buffer charging status at a glance.
Log boiler [Boiler]
Exhaust gas temperature
Boiler flow temperature
Boiler return temperature
44
On/off button
The on/off button
serves only to switch off the
boiler. The boiler is switched on by opening the insulating door.
Green = On
Red = Off
De-ash button
If this button is pressed during boiler operation, the boiler will perform a complete ember burnout
(duration ~1 hour). All embers and ash are burned to make subsequent cleaning easier. Pressing this button again during operation ends the burnout.
Emission measurement
The boiler must already have started up in order to operate this button. This switches the boiler into
emission measurement mode and operates it
for 30 minutes at full load. The control system ensures that sufficient heat is channelled to the buffer, the heating circuits and the hot water tank.
In emission measurement mode, the button shines green and a countdown for the emission measurement mode is displayed. After 30 minutes, all pumps and valves are automatically switched back to automatic mode.
Buffer storage tank and charging status
The buffer storage tank and the pump icon are displayed as soon as the boiler pump is switched on and heat is being supplied to the buffer storage tank. The percent display shows the current buffer charging status.
Outside temperature
The current outside temperature is measured by the installed outside temperature sensor.
Operating mode
This line shows the boiler's current operating mode. The possible modes are listed below.
Ready
The boiler is switched off. The on/off button shines red. The boiler can be started up at any time.
Ignite
See "Start-up" chapter. In ignite mode, the boiler can also be switched off with the on/off button.
Heating
The boiler is switched on and the insulating door is closed. The boiler is supplying heat to the buffer storage tank.
Ember burnout
The fuel in the boiler is almost consumed and the exhaust gas temperature is below 80°C. If the ash button was pressed during boiler operation, the boiler will perform a complete ember burnout for subsequent cleaning.
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Log boiler [Boiler]
Malfunction
There is a malfunction in the draught fan, the exhaust gas temperature sensor or the boiler temperature sensor.
The boiler may not be started up in this mode.
Calibrating lambda probe
After every 500 hours of full-load operation, the boiler performs an automatic calibration of the lambda probe. This always occurs after an ember burnout and only at night between 23:00 and 04:00. This calibration can also be initiated manually by opening the primary and secondary air valves and flushing the boiler with fresh air using the draught fan. If the boiler has not been started up for over 48 hours, this calibration takes only 30 minutes. If the boiler was in operation until recently, the calibration can take up to 3 hours. If the boiler is started up during calibration, the calibration is aborted and started again 9 days later.
Insulation door open
The insulation door is open. If the boiler was previously in heating mode, it switches back to heating mode after the insulation door is closed. For all other modes, the boiler switches to ignite mode after "Insulation door open". If the insulation door stays open for more than 30 minutes, an error message is displayed and (depending on setting) an audible signal emitted.
Overtemperature
The boiler temperature is over the temperature of 90°C set for [Boiler max]. The draught fan is switched off and an error message indicates that less fuel should be added in future. Once the boiler has cooled below 86°C, the draught fan switches on again and heating resumes.
TWIN in operation
This is only displayed if a TWIN burner (pellets) is installed on the log boiler.
"TWIN in operation" mode displayed as soon as the buffer needs heat and the log boiler is unable to provide it. Then the control system starts the TWIN burner to supply heat to the buffer. The current status of the TWIN burner is shown in the [TWIN]
FUB.
If the log boiler's insulation door is open for more than 1 minute, the TWIN burner is automatically
SH Operation
Overview, buttons, functions
switched off because the control system assumes that the log boiler is to be started up. A corresponding message is displayed.
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45
Buffer [Buffer]
Overview, buttons, functions
Overview, buttons, functions Buffer
Buffer overview
Press and [Buffer] to open the Buffer overview screen. The overview shows the current temperatures, the operating mode and charging status of the buffer.
If the buffer is a combination tank (buffer with built-in hot water tank), the hot water temperature is also displayed. The display also shows the charge from a solar heating system.
How the buffer works
The current charging status is calculated using the
3 temperature sensors on the buffer. It is needed to determine the correct amount of firewood to add. The table on page 11 shows how much wood should be added.
Buffer charging status
Operating mode Buffer top
Buffer middle
Buffer bottom
[Buffer top] temperature
[Buffer middle] temperature
[Buffer bottom] temperature
Buffer charging status
Charging by boiler
This icon is displayed when the buffer is being charged by the log boiler.
With a
"combination tank", the icon is shown at the top of the buffer when hot water rapid charge is active. If the buffer is only being charged below the hot water section, this icon appears in the middle of the buffer.
Charging by solar heating system
This icon for solar charging indicates that the buffer is being charged by the solar heating system. The current solar panel temperature is shown above the icon.
Current operating mode
This line shows the current operating mode of the buffer. Below is a list of the possible modes:
Demanding
The buffer is demanding heat from the boiler. If the boiler is switched on, this causes it to start up.
Charging
The boiler is supplying heat to the buffer.
Charged
The buffer switches to charged mode when the log boiler is supplying heat and 80°C has been reached at the top of the buffer (= [Target temperature] factory setting).
If the log boiler is not supplying heat, the buffer can also reach the charged state if the [Buffer target 1] temperature is exceeded in the buffer.
Heat dissipation
After a combustion phase, residual heat from the boiler is channelled to the buffer or, if the boiler overheats, heat from the boiler is transferred to the buffer so the boiler can be cooled.
Freeze protection
A temperature sensor in the buffer has fallen below the freezing protection temperature (factory setting: 10°C).
Sensor failure
A temperature sensor in the buffer is defective.
View the list of error messages to find out which sensor is affected.
46 www.eta.co.at
Buffer with solar
Buffer
Different overviews depending on configuration
The way the buffer and the temperatures are displayed on the screen differs depending on the configuration of the heating system.
Buffer with a solar heating system
If the current solar panel temperature is 5°C
(factory setting) higher than the Buffer bottom
solar temperature, the solar heating system begins to charge the buffer. The icon for solar charging
appears together with the current solar panel temperature.
If the
solar panel temperature falls below the
Buffer bottom solar temperature, the solar coll-
ector pump is switched off.
Buffer top Solar panel temperature
Buffer with solar
Buffer with solar heating system and stratified charging valve
The stratified charging valve
toggles solar charging between the top and bottom sections
of the buffer. With this function, the temperatures
"Buffer top solar" and "Buffer bottom solar" are continually compared with the current solar panel temperature.
First the
top is always charged as soon as the solar
panel temperature is higher than the Buffer top
solar temperature.
After reaching the Buffer target temperature, charging switches to
Bottom until the Buffer
target temperature has also been exceeded at the
bottom.
The icon for solar charging is shown at the top or in the middle of the buffer, depending on the position of the stratified charging valve.
Buffer top Buffer top solar Solar panel
Buffer bottom Buffer bottom solar
Solar panel is charging buffer
Buffer bottom Buffer bottom solar
Solar panel is charging top section of buffer.
The stratified charging valve is in the top
position.
Icon in the middle: buffer is being charged in
bottom section. The stratified charging valve is in the
bottom position.
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Combination tank with solar
Combination tank with solar Buffer
Combination tank with a solar heating system
There are different types of combination tank. A hot water tank can be installed in the top section of the buffer, an internal water heat exchanger may be integrated throughout the entire height of the buffer, or a third-party fresh water module may be installed.
For all these variants, the overview always shows
an internal water heat exchanger and the hot
water temperature at the top of the buffer is displayed.
Buffer bottom
Buffer top
Temperature of hot water tank
Switching times for circulation pump for combination tanks only adjustable in text menu
With combination tanks, there is also the option of controlling a circulation pump. No timer for the circulation pump is displayed in the overview.
Switching times for the circulation pump must be adjusted in the text menu.
In the Buffer overview, press to open the text menu. Tap the [Hot water tank] line and, in the submenu, tap the [Circulation] line.
Tap the [Circulation times] line. Time slots for the circulation pump can only be set on an individual basis for each day of the week.
2 x
Double-tap the desired time slot. A screen appears for setting the time slot:
Buffer bottom solar
48
Time slots for the circulation pump can now be changed.
Press [Accept] to save the new settings. Use the same method to adjust the time slots for all other days of the week.
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"Buffer bottom max." for solar heating systems
Buffer "Buffer bottom max." for solar heating systems
"Buffer bottom max." switch-off temperature
(solar heating systems only)
The "Buffer bottom max." switch-off temperature can only be set when the
solar heating system is
charging the buffer. This adjustable temperature sets a
threshold for how much the buffer can
be charged by the solar heating system in order to prevent the buffer from overheating.
If the
Buffer bottom solar sensor reaches the adjustable Buffer top max. temperature, the solar
collector pump on the solar heating system is
switched off.
The factory setting for the "Buffer bottom max." temperature is 90°C.
Changing the "Buffer bottom max." temperature
Press the buttons [Buffer] and to open the text menu. Tap the [Buffer] line and then, in the submenu, tap [Buffer bottom solar].
Double-tap the [Buffer bottom max.] line.
2 x
A settings screen opens:
Enter the new temperature and press [Accept]. The text menu display appears again.
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Heating circuit [HC1]
Overview, buttons and functions
Overview, buttons and functions
"Heating circuit" overview
Press and [HC] to open the "Heating circuit 1" overview screen.
Each heating circuit has its own function block
(HC2, HC3...).
In the overview of the selected heating circuit, the on/off button can be used to switch the heating circuit on and off.
The timer can be used to set 3 different time slots for each day of the week. If there is a room sensor installed, you can also adjust the desired room temperature.
If not, a slider on the overview screen allows you to adjust the room temperature.
"Day" and "Night" mode
During the time slots, the heating circuit is in
"Day" mode.
Outside the time slots, the heating circuit is in
"Night" mode.
Heating circuit on/off
This button is used to switch the heating circuit on and off.
The boiler has a separate on/off button.
Green = Heating circuit on
Red = Heating circuit off
Heating circuit
Slider
The slider is
only shown if there is no room
temperature sensor installed. The slider can be used to change the room temperature by approx.
+/- 5°C.
Please bear in mind that this substitute function cannot replace the precision of a room sensor.
Timer
The timer shows the set
heating time slots for
the current day of the week. Tapping this timer brings up a screen where it is possible to set
3 time
slots for each day of the week.
If a
room sensor is installed, the desired room
temperature can be set for each time slot.
Likewise, the reduced room temperature (set-back temperature) between the heating time slots can also be adjusted.
Within a set time slot, the heating circuit will be in
"Day" mode. Outside of the time slots, it will be in
"Night" mode.
If the heating circuit is operated in
"Auto"
mode ( button),
this button changes
the icon depending on whether the heating circuit is running at
"Day"
or
"Night"
temperature.
Current room temperature
(room sensor only)
Only displayed if a room sensor is installed
for this heating circuit. This displays the current room temperature as measured by the room sensor.
Current flow temperature
The current target flow temperature for the heating circuit is only displayed if the heating circuit is switched on and in operation.
50 www.eta.co.at
Heating circuit Overview, buttons and functions
Outdoor -13°C
Current outside temperature
The current outside temperature is measured by the built-in outside temperature sensor.
Constant "Day" mode
This button can be used to switch the heating circuit to constant "Day" mode (button lights up ).
If a room sensor is installed, the temperature will be regulated to the highest room temperature set for that day in the timer. If there is no room sensor, the heating circuit runs using the
heating
curve "Day".
0 3 6 9 12 15 18 21 24 pressing the button.
Das Drücken von „Gehen“ in einer Heiz-Pause überspringt das nächste Heiz-Zeitfenster.
Constant "Night" mode
Come
This function is only available in "Auto" mode.
Regardless of the current time slot, pressing the
button (when you come home)
switches the
heating circuit to "Day" mode (button lights up
) until the next set time slot.
If the unit has a built-in room sensor, the heating circuit is regulated to the set room temperature. If there is no room sensor, the heating circuit runs using the heating curve "Day".
Das Drücken von „Kommen“ in einer Heiz-Pause heizt bis zu Ende des folgenden Heiz-Zeitfensters.
0 3 6 9 12 15 18 21 24
Das Drücken von „Kommen“ während eines Heiz-Zeitfensters überspringt die folgende Absenkphase (heizt durch).
0 3 6 9 12 15 18 21 24 temperature (button lights up ).
If there is a built-in room sensor, the temperature is regulated to the set-back temperature that is set in the timer. If the unit does not have a room sensor, the heating circuit runs using the
heating
curve "Night".
"Auto" and "Day" modes can be ended by pressing the button.
"Auto" mode
"Auto" mode automatically switches between
"Day" and "Night" mode.
Within a set time slot, the heating circuit will be in
"Day" mode. Outside of the time slots, it will be in
"Night" mode.
The
"Auto" display changes the icon depending on whether the heating circuit is currently in "Day" or "Night" mode.
"Day" mode
"Night" mode
Go
This function is
only available in "Auto" mode.
Regardless of the current time slot, pressing the button (when you go out) switches the heating circuit to "Night" mode (button lights up ) until the next set time slot.
If the unit has a built-in room sensor, the heating circuit is regulated to the stored set-back temperature. If there is no room sensor, the heating circuit runs using the heating curve "Night".
Das Drücken von „Gehen“ während eines Heiz-Zeitfenster senkt ab bis zum Beginn des nächsten Zeitfensters.
0 3 6 9 12 15 18 21 24
Das Drücken von „Gehen“ in einer Heiz-Pause überspringt das nächste Heiz-Zeitfenster.
0 3 6 9 12 15 18 21 24
Das Drücken von „Kommen“ in einer Heiz-Pause heizt bis zu Ende des folgenden Heiz-Zeitfensters.
0 3 6 9 12 15 18 21 24
Das Drücken von „Kommen“ während eines Heiz-Zeitfensters überspringt die folgende Absenkphase (heizt durch).
0 3 6 9 12 15 18 21 24
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Operating modes
Operating modes
Holiday mode
The "Holiday" button is used to set a period for which the selected heating circuit will run in
"Night" mode.
Any adjustments made to the room temperature also influence the "Day" temperature, and thus the temperature for heating up at the end of the holiday. As such, it is best not to adjust the room sensor for holiday set-back.
If you wish to reduce the room temperature, you can set an individual "set-back temperature" in the timer. During
"Holiday" mode, the lowest of all the "set-back temperatures" in the timer is the
one that applies.
On Day
Current operating mode
This line shows the current operating mode of the heating circuit. Below is a list of the possible modes:
On Day
The heating circuit is
within one of the timer’s
time slots and in “Day” mode.
The flow temperature of the heating circuit is regulated using the “Heating curve day”.
If the unit has a built-in room sensor, the temperature is regulated to the highest room temperature set for the time slot. The switch can be in either the “Auto” or the “Day” position.
Heating circuit
On Night
The heating circuit is
outside of the timer's time
slots and in "Night" mode.
The flow temperature of the heating circuit is regulated using the "Heating curve night".
If the unit has a built-in room sensor, the temperature is regulated to the stored "set-back temperature". The switch can be in either the "Auto" or the "Night" position.
Holiday On
The heating circuit is switched on and in holiday mode (= constant "Night" mode). It remains in this state until the "End of holiday" date.
On Delay
The heating circuit is no longer demanding any heat and is in delay mode. The boiler pump is still running for a short time in order to channel the heat out of the boiler.
On Freezing room
The heating circuit is in operation because the current room temperature is below the freezing protection temperature (10°C).
On Freezing flow
The heating circuit is in operation because the current flow temperature is below the freezing protection temperature (10°C).
On Heat dissipation
The heating circuit is in operation in order to cool the boiler by dissipating excess heat. Also displayed during emission measurement.
On Overtemperature
The heating circuit is in operation because the boiler is running at overtemperature. The heating circuit is running at the highest set flow temperature in order to dissipate the heat from the boiler
(overheating protection).
52 www.eta.co.at
Heating circuit
On Screed
The heating circuit is in operation; the screed drying program is being run.
Off Enable temp.
The heating circuit is still switched off because the boiler is not yet able to supply sufficient heat. The enable temperature for the heating circuit has not yet been exceeded.
Off Target day
The heating circuit is switched off. The target flow temperature calculated from the heating curve
"Day" is below the room temperature as measured by the room sensor.
If the unit does not have a room sensor, the calculated target flow temperature is below 18°C.
Off Target night
The heating circuit is switched off. The target flow temperature calculated from the heating curve "Night" is below the room temperature as measured by the room sensor.
If the unit does not have a room sensor, the calculated target flow temperature is below 18°C.
Off Target holiday
The heating circuit is within the set holiday time, and thus switched off.
The target flow temperature calculated from the heating curve "Night" is below the room temperature as measured by the room sensor.
If the unit does not have a room sensor, the calculated target flow temperature is below 18°C.
Off Room day
The heating circuit is within a time slot, but switched off. The current room temperature is higher than the set "Room target" temperature by at least the "RoomOffDiff" temperature.
Off Hot water
The heating circuit is switched off because the hot water is currently being heated.
Operating modes
Off Room night
The heating circuit is switched off and outside the set time slots. The current room temperature is higher than the stored set-back temperature by at least the "RoomOffDiff" temperature.
Off Room holiday
The heating circuit is within the set holiday time, and thus switched off. The current room temperature is higher than the stored set-back temperature by at least the "RoomOffDiff" temperature.
Off Outside day
The heating circuit is switched off. The current outside temperature is higher than the set temperature for "Day Heating threshold".
Off Outside night
The heating circuit is switched off. The current outside temperature is higher than the set temperature for "Night Heating threshold".
Off Outside holiday
The heating circuit is within the set holiday time, and thus switched off. The current outside temperature is higher than the stored set-back temperature.
Off Summer
The heating circuit is switched off. The only active functions are the freezing protection and the boiler pump's "anti-blocking protection", which runs at midday every Saturday.
Off Sensor failure
The heating circuit is switched off due to a defect in the flow temperature sensor.
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Setting the heating time slots
Setting the heating time slots
Setting the heating time slots
The heating circuit timer can be used to set 3 different time slots for the heating for each day of the week.
If the unit has a room sensor, a target room temperature can also be set for each time slot.
Likewise, the reduced room temperature (set-back temperature) between the heating time slots can also be adjusted for each day of the week.
"Day" mode
During a set time slot, the heating circuit is in
"Day" mode.
If a room sensor is installed, this regulates the heating circuit to the set target room temperature for the time slot.
If there is no room sensor, the flow temperature of the heating circuit is calculated using the heating curve.
"Night" mode
Outside the time slots, the heating circuit is in
"Night" mode.
If a room sensor is installed, this regulates the heating circuit to the stored "set-back temperature" for the time slot.
If there is no room sensor, the flow temperature of the heating circuit is calculated using the heating curve.
Adjusting the timer (with room sensor)
In the overview for the selected heating circuit, tap the timer. The screen for setting the timer opens.
Heating circuit
Overview of current time slots
The current day of the week is selected automatically. The set time slots for the current day of the week are shown on the screen.
Days of the week
Room temperature only
Set-back temperature between time slots
3 adjustable time slots for each day of the week
Target room temperature
room sensor only
Selecting a time slot
Tap the [Time slot 1] line. The time slot setting screen opens.
The times for “Day” mode can now be altered.
If the unit has a built-in room sensor, the target room temperature can also be set.
Room sensor only
Press [Accept] to save the new settings. Use the same method to adjust the other time slots.
54 www.eta.co.at
Heating circuit
Copying time slots to other days of the week
Once the time slots have been adjusted, they can also be adopted for other days of the week.
In the time slot overview screen, tap the [Copy] button. A screen appears for selecting a day of the week:
Tap to select the desired day of the week or [All] and then press [Accept]. The time slots are adopted for the selected days.
The new time slots are displayed.
Setting the heating time slots
"Holiday" function
With this function, the button can be used to switch the heating circuit
to constant "Night"
mode for an adjustable time period. This setting only ever applies for the selected heating circuit.
The hot water supply from the hot water tank or the fresh water module is
not affected by the
"Holiday" function.
For "Holiday" mode, the heating circuit is regulated to the lowest set-back temperature set in the timer.
If you wish to reduce the temperature for the
"Holiday" time period, you can set an individual set-back temperature in the timer.
Adjusting the room sensor also affects the "Day" temperature when heating up at the end of the holiday. As such, it is best not to adjust the room sensor for holiday set-back.
Setting a "Holiday" time period
In the "Heating circuit" overview screen, tap the
button. A screen opens:
Finally, press [Close].
The heating circuit overview reappears.
Enter the time for the beginning of your holiday.
The button can be used to switch between the
"Start" and "End" of the holiday.
Enter both times and press [Accept].
The heating circuit overview reappears.
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The heating curve
The heating curve
The heating curve
The heating curve controls the flow temperature for the "Day" and "Night" modes of the heating circuit in question. During a set time slot, the heating circuit is in "Day" mode. Outside the time slots, the heating circuit is in
"Night" mode.
Each heating circuit has its own heating curve, as underfloor heating requires different settings to radiator heating.
The
diagram shows a heating curve for radiator heating. If the control settings have been adapted to your system, lower heating curves may be set for underfloor heating and higher heating
curves for radiator heating.
80
70
Maximum flow temperature
(adjustable with SERVICE permission)
60
Day
50
40
44°C Day
Nigh t
30
29°C Night
20
10
Freezing protection
0
-20 -15 -10 -5 0 +5 +10
Outside temperature (°C)
+15 +20
Maximum flow temperature
This limit protects your heating system.
Underfloor heating is usually limited to 45°C, while radiators with metal pipes can take temperatures up to 85°C.
Heating circuit
Heating curve "Day"
During a set time slot, the heating circuit is in "Day" mode. The heating curve for "Day" mode can be adjusted using the parameters "Flow at -10°C" and
"Flow at +10°C". The control system uses these parameters to plot a line: the heating curve "Day".
The heating curve "Day" and the current outside temperature are used to calculate the required flow temperature for the heating circuit. Example:
at +3°C outside temperature => 44°C flow
at -5°C outside temperature => 54°C flow
If the unit has a room sensor, the calculated flow temperature is corrected. The actual flow temperature may be higher or lower.
Heating curve "Night"
Outside the set time slots, the heating circuit is in
"Night" mode.
The heating curve "Night" is set back from the heating curve "Day" by the adjustable value "Setback". The heating curve "Night" and the current outside temperature are used to calculate the required flow temperature.
Factory settings for the heating circuit
With software versions 1.20.0 and higher, the system configuration for the heating circuit offers the user a choice between
underfloor and
radiator heating.
This choice pre-sets some of the parameters in the heating circuit. For information on these parameters and their factory settings, see page <?> .
.
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"Day Heating threshold" and "Night Heating threshold"
Heating circuit "Day Heating threshold" and "Night Heating threshold"
The parameter "Day Heating threshold"
With the "Day Heating threshold" parameter, an outside temperature is set which, when exceeded, will result in the heating circuit being switched to
"Day" mode.
The factory setting for this parameter is 18°C.
The "Day Heating threshold" can be set
differently for each heating circuit.
Changing the parameter "Day Heating threshold"
Press to open the text menu for the selected heating circuit.
Tap the [Heating circuit] line to open the submenu.
Double-tap on the [Day Heating threshold] line
(or select the line and press the [Change value] button).
The parameter "Night Heating threshold"
If the heating circuit is in "Night" mode, an outside temperature is set which, when exceeded, will result in the heating circuit being switched off.
The factory setting for this value is 2°C.
The "Night Heating threshold" can be set
differently for each heating circuit.
Changing the parameter "Night Heating threshold"
Press to open the text menu for the selected heating circuit.
Tap the [Heating circuit] line to open the submenu.
Double-tap on the [Night Heating threshold] line
(or select the line and press the [Change value] button).
A settings screen opens:
2 x
A settings screen opens:
2 x
Enter the new heating threshold for "Day" mode.
Press [Accept] to save the new value.
Press to open the "Heating circuit" overview.
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Enter the new heating threshold for "Night" mode.
Press [Accept] to save the new value.
Press to open the "Heating circuit" overview.
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Adjusting the heating curve
Adjusting the heating curve
Adjusting the heating curve
If the heating circuit is always too warm or too cold, the flow temperature must be adjusted. This can be done using two parameters:
"Flow at -10°C" and "Flow at +10°C".
No large jumps in temperature
Do not set any large jumps in temperature when adjusting "Flow at +10°C" and "Flow at -10°C":
You may need to alter the flow temperatures again after one or two days, but working in small steps will help you to set the heating circuits more precisely, thus saving energy.
During the transition period -> "Flow at +10°C"
If the heating circuit is always too warm or too cold during the
transition period (spring and autumn),
only the flow temperature for "Flow at +10°C" is
reduced or increased.
80
50
40
30
20
70
60
Nigh t
Day
10
0
-20 -15 -10 -5 0 +5 +10
Outside temperature (°C)
+15 +20
Do not change the flow temperature "Flow at
-10°C" during the transition period.
Heating circuit
Factory settings for the heating circuit
With software versions 1.20.0 and higher, the system configuration for the heating circuit offers the user a choice between
underfloor and
radiator heating.
This choice pre-sets some of the parameters in the heating circuit. These parameters and their factory settings can be seen in the table below:
Preset
Max flow
Flow at -10°C
Flow at +10°C
Set-back
Enable temperature
Room effect
Underfloor Radiator
45°C
33°C
25°C
3°C
25°C
1°C
65°C
55°C
35°C
15°C
40°C
4°C
In winter -> "Flow at -10°C"
If the heating circuit is always too cold or too warm
in winter, only the flow temperature
"Flow at -10°" is increased or reduced.
80
50
40
30
70
60
Nigh
Day t
20
10
0
-20 -15 -10 -5 0 +5 +10
Outside temperature (°C)
+15 +20
Do not change the flow temperature "Flow at
+10°C" in winter.
58 www.eta.co.at
Heating circuit
Adjusting the heating curve for outside temperatures above 0°C -> Changing
"Flow at +10°C"
If the heating circuit is always too cold or too warm in the
transition period, the flow temperature
"Flow at +10°C" is increased or reduced.
No large jumps in temperature
For underfloor heating, never more than 2°C
For radiators, never more than 4°C
Press to open the text menu for the selected heating circuit.
Tap the [Heating circuit] line and, in the submenu, tap the [Heating curve] line.
Double-tap on the [Flow at +10°C] line (or select the line and press the [Change value] button).
Adjusting the heating curve
Adjusting the heating curve for outside temperatures below 0°C -> Changing
"Flow at -10°C"
If the heating circuit is always too cold or too warm
in winter, the flow temperature "Flow at -10°C" is
increased or reduced.
No large jumps in temperature
For underfloor heating, never more than 2°C
For radiators, never more than 4°C
Press to open the text menu for the selected heating circuit.
Tap the [Heating circuit] line and, in the submenu, tap the [Heating curve] line.
Double-tap on the [Flow at -10°C] line.
A settings screen opens:
2 x
A settings screen opens:
2 x
Enter the new flow temperature for this heating circuit. Press [Accept] to save the new value.
The text menu for the selected heating circuit is displayed. Press to open the "Heating circuit" overview.
SH Operation
Enter the new flow temperature for this heating circuit. Press [Accept] to save the new value.
The text menu for the selected heating circuit is displayed. Press to open the "Heating circuit" overview.
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Setting the "enable temperature"
Setting the "enable temperature"
Setting the parameter "enable temperature"
The heating circuit pump does not start until the energy source (buffer or boiler) has exceeded the
"enable temperature". You can give a heating circuit priority by setting the "enable temperature" lower than that for all the other heating circuits in the system.
Opening the heating circuit text menu
Press to open the text menu for the selected heating circuit.
Tap the line [Heating circuit] and, in the submenu, double-tap the line [Enable temperature].
2 x
A settings screen opens:
60
Enter the new enable temperature for this heating circuit. Press [Accept] to save the new value.
The text menu for the selected heating circuit is displayed. Press to return to the heating circuit overview.
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Heating circuit
Adjusting the "Set-back"
Heating circuit
The parameter "Set-back"
If the unit does not have a room sensor, the parameter "Set-back" is used to adjust the night mode. The control system subtracts the "Set-back" parameter from the heating curve "Day" to get the heating curve "Night".
Outside the time slots set in the timer, the heating circuit is in "Night" mode, and runs using the heating curve "Night".
The factory setting for this "Set-back" is 15°C.
The
"Set-back" can be adjusted for each
heating circuit. The following steps are the same for all heating circuits.
Adjusting the "Set-back"
Changing the parameter "Set-back"
Press to open the text menu for the selected heating circuit.
Tap the [Heating circuit] line and, in the submenu, tap the [Heating curve] line.
Double-tap on the [Set-back] line.
2 x
Do not use large set-backs
Do not overuse "set-back", as much higher air temperatures will be required to ensure comfort in the morning if the walls have cooled down too much overnight. In addition to reducing comfort, this also wastes the energy saved overnight.
Depending on the "Flow at -10°C" temperature and the type of heating circuit used (radiator or underfloor heating), the following guidelines apply for the set-back:
Temperature
Radiator Underfloor
Flow at -10°C
40°C 60°C 80°C
Set-back 5-8°C 10-15°C 15-22°C
30-40°C
3-5°C
A settings screen opens:
Enter the new temperature difference for the "Setback". Subtracting the "Set-back" from the heating curve "Day" gives you the heating curve "Night".
Press [Accept] to save the new value. The text menu for the selected heating circuit is displayed once more.
Press to return to the heating circuit overview.
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Service and maintenance records
Service and maintenance records
Keep records for service, maintenance or repairs
We recommend that you keep records about all service and maintenance work, as well as malfunctions. These records can be entered in the following pages.
Then you and our customer service will always have an overview of the work performed on the system.
Date
Performed by
Service / maintenance / cleaning
Worked performed / parts replaced
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Date
Performed by
Service and maintenance records
Service / maintenance / cleaning
Worked performed / parts replaced
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Artikel Nr. der Anleitung SH_Bedienung_Touch_EN
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Key Features
- Automatic adjustment of operation to user needs
- Control via app or display
- External heat source control module
Related manuals
Frequently Answers and Questions
What is the required environment for a boiler setup?
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