Operating Manual
PWS 0601-A and PWS 1201-A
(Models Twist 6 + Twist 12)
English
Version: mst 110208 PWS 0601-A & PWS 1201-A BA_EN
Article number: 102471
From SW 2.03
All information subject to change. All rights reserved.
1
Table of Contents
1 Preface ............................................................................................................ 2
2 Important notes ............................................................................................... 2
2.1 Safety ......................................................................................................................................2
2.2 Identification ............................................................................................................................3
2.3 Liability ....................................................................................................................................3
2.4 Notes on legal regulations .........................................................................................................3
2.5 Stove-related hazards ...............................................................................................................4
3 Approved fuel................................................................................................... 4
3.1 Storage of pellets......................................................................................................................4
4 Construction of the stove .................................................................................. 5
4.1 Standard accessory ................................................................................................................... 5
4.2 Front view ................................................................................................................................5
4.3 Rear view .................................................................................................................................6
5 Installation....................................................................................................... 7
5.1 Minimum distances ................................................................................................................... 7
5.2 Flue ......................................................................................................................................... 8
5.3 Connecting piece, pellet stove - chimney....................................................................................8
5.4 Combustion air .........................................................................................................................8
5.4.1 Intake from external source (preferred) ..................................................................................... 8
5.4.2 Intake from internal source .......................................................................................................9
5.5 Flue with air intake system (AIS) ...............................................................................................9
5.6 Non-dependence on ambient air ................................................................................................9
5.7 Backflow system .......................................................................................................................9
6 Control system max3 ...................................................................................... 10
6.1 Operating modes .................................................................................................................... 10
6.2 Overview of user and service menus ........................................................................................ 11
6.3 External requirement............................................................................................................... 12
7 Start-up, operating mode................................................................................ 13
7.1 Filling the pellet bin................................................................................................................. 13
7.2 Functional characteristics of the heating operation .................................................................... 13
7.2.1 Self-test ................................................................................................................................. 13
7.2.2 Starting phase, pre-heating phase ........................................................................................... 13
7.2.3 Heating phase ........................................................................................................................ 13
7.2.4 Cleaning phase ....................................................................................................................... 13
7.2.5 Cool-down phase: ................................................................................................................... 13
7.2.6 Standby.................................................................................................................................. 13
7.3 Heating mode......................................................................................................................... 14
7.4 Performance-regulated heating mode....................................................................................... 14
7.5 Setting date / time.................................................................................................................. 15
7.6 Setting timer switch ................................................................................................................ 15
7.7 External control with internal timer switch ................................................................................ 16
7.8 Activating the timer switch ...................................................................................................... 16
7.9 Resetting to factory settings .................................................................................................... 16
8 Cleaning and maintenance .............................................................................. 17
8.1 After 200 kg or 14 days........................................................................................................... 17
8.2 After 800 kg or annually .......................................................................................................... 18
9 Errors - causes - remedies .............................................................................. 20
9.1 Service request....................................................................................................................... 21
10 Technical data................................................................................................ 22
10.1 Dimensions............................................................................................................................. 23
11 Conformity..................................................................................................... 25
12 Notes............................................................................................................. 27
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1 Preface
Thank you for choosing one of our products.
Please inspect the pellet stove upon arrival very carefully for damage and completeness of the accessory
equipment included with delivery.
2 Important notes
2.1 Safety
Before installing your appliance and starting it, please take care to read the operating manual in detail. This
will ensure that you avoid damage caused by incorrect installation or operation.
To carry your pellet stove only approved conveying equipment with a sufficient load rating may be used.
When burning pellets, heat energy is released causing intensive heating of the stove surface and glass door.
If these parts are touched without using appropriate protective clothing, or aids such as e.g. suitable gloves,
there is a risk of burns.
Draw your children's attention to this specific danger and keep them away from the heating appliance whilst
it is operating.
Placing inflammable objects on or close to the heating appliance is prohibited.
The pellet stove may only be connected to the mains supply after it has been connected to the flue by an
approved specialist.
Do not place items of washing on the stove to dry.
When drying items of clothing and suchlike, they must be positioned sufficiently well away from the stove
(fire risk)!
Using or working with highly combustible or explosive materials in the same room or adjoining rooms whilst
your stove is in operation, is prohibited.
Filling the pellet bin:
The opening of the pellet bin is sufficiently large to allow it to be easily filled.
Take care to ensure that no pellets fall onto the grill of the vent, or the body of the hot stove. This could
cause formation of dense smoke.
Never operate the stove with the glass door or the pellet bin open. A flash fire or misfire could be caused.
Never remove the safety equipment such as grills etc..
Always remove the mains plug before doing any work.
Make certain that there is always sufficient combustion air in the room where the stove is set up in.
The pellet stove is only designed to use standard low-dust wood pellets according to EN 14961-2 (class 1).
If weather-related conditions, such as positive pressure in the chimney for example, are prevalent, the stove
must not be started.
The stoves are designed to be used in domestic living spaces with normal humidity and temperatures of 0 °C
to 30 °C. Stoves are not protected against water splashing and must not be installed in wet rooms.
3
Suitable antifreeze (approved for use in solar systems) must be used for stoves with water heat exchangers
where room temperatures are < 5 °C.
2.2 Identification
The documentation included with delivery will assist with:
• operating the pellet stove safely
• exploiting all potential for use of the stove
• performing cleaning and maintenance work
This operating manual should be kept in good condition and in an easily accessible location until the stove is
disposed of. It should be given to any new owner(s).
If the operating manual is lost or destroyed, a new copy can be requested any time from your specialist
dealer.
The illustrations and sketches are intended as basic information only. They are not to scale.
Directional information such as „right/left, front/back“ always relates to the position facing the front of the
pellet stove.
ISO units of measurement are used for dimensions, which are given in mm unless otherwise indicated.
2.3 Liability
In the event of personal injury or property damage, the manufacturer shall be responsible for the building
standard and safety of the machine only if design defects can be verified.
No liability for:
• inappropriate use
• inappropriate operation
• inadequate maintenance
• use of non-original spare parts
• structural modifications
Non-intended use
Inappropriate use of the pellet stove can result in life-threatening injuries and other major property damage
as well as in loss of warranty.
Uses not conforming to the intended use are:
• any structural modification of the pellet stove
• operation without proper connection to the flue
• operation with open doors and covers
• operation without knowledge of the operating manual
• installation of non-original spare parts
• use of wood pellets that are not approved by the manufacturer
2.4 Notes on legal regulations
Please observe local, national and European regulations and standards applicable for the installation and
operation of combustion appliances.
4
2.5 Stove-related hazards
Danger of fire / burn injuries
• The pellet stove must never be used with open doors or covers; sparks or flames could be released.
• Never cover the stove with blankets, towels or similar items. During operation, various surfaces reach
temperatures of over 65 °C. The materials could catch fire.
• If required, please use suitable protective equipment.
Chimney fire or burnback
• Never pull the power plug and keep closed all doors and covers. Open windows and doors.
Poisoning and suffocation hazard
• The flue gases contain harmful constituents, including carbon monoxide. This gas is odourless and
poisonous.
• Self-protective action for rescuing unconscious persons: thoroughly ventilate closed rooms before
entering.
Electrocution hazard
• For power supply voltages of 50 Hz and an exposure time of more than one second, the following
applies:
Currents higher than 50 mA and voltages of 50 V or higher are extremely dangerous.
Power cut
• Never open the doors or the bin lid during a power cut. Poisonous gases could be released.
• Following a short power cut, the heating mode is automatically continued.
• After a longer power cut, the stove first switches to cool-down mode and subsequently to starting
phase.
3 Approved fuel
The requirements for approved fuel are defined in the
EN 14961-2 (class A1), EN plus (class A1) or
ÖNORM M7135, DIN 51731, DIN Plus standards. Low-dust wood pellets are to be used.
Length 10 - 30 mm
Diameter 6 mm or 8 mm*)
Bulk density 650 kg/m³
Calorific value 5 kWh/kg
Residual moisture < 10 %
Ash content < 0.5 %
Density 1.12 kg/dm³
*) Manual adjustments by the service engineer are necessary!
ATTENTION: Waste materials and liquids are not to be burned in the stove!
3.1 Storage of pellets
To ensure combustion of pellets without any problems, it is necessary to store them in dry condition and
free of contaminants.
5
4 Construction of the stove
4.1 Standard accessory
Operating manual, burn pot brush, power lead, multi-functional tool.
4.2 Front view
Transition period / summer use.
1. Dismount deflector plate,
2. Pull out insulating plate.
Door opener
a Control panel max3
b Pellet bin lid
c Door-opening mechanism
d Glass door
e Side panel
f Insulating plates for summer use
c
f f
a
c
d
e f
b
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4.3 Rear view
a Voltage rating 230 V
b Safety temperature limiter (STL)
c Air-intake pipe
d Flue pipe connection Ø 100
e Opening for safety valve overflow
f Opening for heating flow or respectively return
b a
f
c
d
e
b
7
5 Installation
5.1 Minimum distances
Minimum permissible distances to
combustible materials:
Rear (x): 5 cm
Sides (y): 15 cm
Front (z): 80 cm
Recommended permissible
distances to combustible materials:
Rear (x): 25 cm
Sides (y): 50 cm
Front (z): 80 cm
Wall
Front
Floor protection:
Because the temperature in the lower areas of the pellet stove increases only minimally during operation,
installation of a fireproof plate under the stove is not required.
Z
y X y
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5.2 Flue
The flue system is to configured according to EN 13384-1 . Before starting the pellet stove, a positive
conformance report regarding the chimney must have been obtained.
Flue draught limitation:
If there is a strong flue draft (>30 Pa), a suitable auxiliary air facility is to be fitted. The local regulations
must be followed!
Multiple-stove arrangements with one chimney:
Pellet stoves PWS 0601-A or PWS 1201-A with max3 controls and integral air sensor, are suitable for
multiple-stove arrangements with one chimney.
Prerequisites:
• The chimney is to be dimensioned according to EN 13384-1 and it must be ensured that there is a
negative pressure (greater than 1Pa).
• There is a positive report on the chimney issued by the relevant authority.
• Regional regulations must always be followed!
• The operator is to ensure that the stoves do not operate simultaneously.
• That as far as the construction of the pellet stoves are concerned, it is not a just burner, but an
automatically loaded stove with a day feed bin for burning solid biomass fuel (pellets) and with a fluegas fan. This flue-gas fan conveys the flue gases into the chimney.
• That no positive pressure can be caused in the connecting piece or in the chimney.
Danger! Incorrect operation can result in emission of flue gases (carbon monoxide poisoning).
5.3 Connecting piece, pellet stove - chimney
The connecting piece between pellet stove and entry into the chimney, is to be designed so that the flue
gases enter the chimney with negligible loss of pressure or cooling (see DIN 18160). Inspection and cleaning
must be possible. An external sleeve is sufficient to ensure tightness of the connecting piece.
5.4 Combustion air
5.4.1 Intake from external source (preferred)
It is highly recommended that combustion air be taken in from an external source. By this means you ensure
that operation of the stove is independent of the ambient air, reduce energy consumption and avoid possible
dirtying of the air sensor. Where room ventilation or fume extractor is fitted, air intake from an external
source is mandatory.
• Maximum tube lengths and diameters are to be taken from the table.
• The end of the air extraction pipe needs to be located outside or in a well-ventilated room inside the
building.
• The air pipe must be designed so that no formation of condensation is possible and that no water can
enter the stove. See DIN V 18160 standard.
• The internal surface of the air pipe must be smooth e.g. Geberit tubing
• A filter is to be attached across the entrance of the air intake (mesh size 1 mm) to prevent small animals
or foreign matter entering and impeding the intake of air.
• The air-intake pipe is to incorporate a 90° downward elbow where it enters the building, so that gusts of
wind do not affect the air supply.
9
Table: Diameters and tube lengths of the flue-gas pipe
Max. length Max. number of 90° elbows
*Extension pipe Ø 75 4 m 3
or
*Extension pipe Ø 110 9 m 4
*External dimensions in mm
5.4.2 Intake from internal source
The combustion air can also be taken in from the installation room. The operator of the stove must ensure
without fail that sufficient combustion air is available (approx. 30 m³/h). Never exceed the maximum
ambient negative pressure of 4 Pa!
5.5 Flue with air intake system (AIS)
• The AIS flue system is approved and certified for solid fuels.
• The cross-section of the connection the combustion air intake connection from stove to chimney is equal
to at least the circular area of a 100 mm tube.
• The air duct is insulated from the flue-gas duct. This means that no transmission of heat from flue gas
to combustion air occurs.
• The cross-sectional area of the air intake is at least equal to the circular area of a 100 mm tube.
• There must be no contact between flue gas and air intake at the point of entry to the chimney or along
its length.
5.6 Non-dependence on ambient air
The tightness of the stove conforms to German requirements for solid fuel combustion appliances nondependent on ambient air. The approval allows use in passive houses, low-energy houses and rooms with
controlled ventilation and external combustion air intake.
• The test was carried out by TÜV Southern Germany.
• Approval has been applied for to the DIBt (Deutsches Institut für Bautechnik).
• The pellet stove’s installation must be inspected by the regional master chimney sweep before being
used for the first time (valid certificate of chimney sweeping).
5.7 Backflow system
ATTENTION: It should be ensured that the return temperature at the intake connection to the heat
exchanger does not fall below 50 °C during heating mode. Undercutting this temperature results in corrosion
and soot formation and thereby, destruction of the heat exchanger.
To ensure safe operation the stove is to be properly connected to a reliable heat take-out facility (buffer
tank). The requisite water quality is stipulated in Ö NORM H 5195 and is to be observed.
Without a regulation return riser the guarantee is invalidated!
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6 Control system max3
a - Operating display with current operating mode
b - Present flow temperature
c - Start/Stop and menu display (-/+)
d - Action pads (intuitive operation)
e - Day of week and time of day
f - Display for required type of operation: (hand for manual operation)
• Manually, temperature, or performance controlled
• Timer switch
• External 0-10 V
• External 0/1
g - Required flow temperature (target temperature)
6.1 Operating modes
The stove can be operated in one of two different operating mode options:
• Temperature regulated 65 – 75 °C (select in menu: manual temperature)
• Automatic operation: Heating performance is selected automatically
• Performance regulated 30 % – 100 % (menu manual performance)
• Manual mode: Heating performance is selected manually
The stove is supplied temperature regulated ex factory.
a b
c d
e f g
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6.2 Overview of user and service menus
MENU
Fow temperature
Manual-Power
65 - 75°C
30 - 100%
22.7.2011
Ext. control
Ext. analog signal
Manual-Temperature
Manual-Power
Chrono-Thermostat
P01:00:00:00:00
language
Error memory list
Service
German
English
French
Italian
Code: -Nr. 01/20
Test
Revs
Flue gas fan RPM
Flue gas fan RPM
Auger motor
Open burn grate
Close burn grate
Pump
Ignition
Sensors
Flow temp.
Chamber temp.
Auger motor
Air stream
Revs
STB
Pellet tank lid
Filling level
Burn grate
Ext. Contact
Ext.Power signal
Slid temp.
Elect.board temp
Start temp. 55 - 67°C
Setup pump Yes/No
Auger motor
Info Version Stove model
Contrast Contrast
Emergency mode
Air sensor
Chamber temp. sensor
Factory settings Reset
Statistics Working hours
Clock timer
Ignitions
Cleaning Clean burn brate
Date / Time
Working mode
Yes/No
Filling time
Break time
Run time motor
External filling
30min - 7h
22h00m - 06h00m
Aktuell/Limit
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6.3 External requirement
External requirement (0/1) (EAB)
The external requirement allows the integration of
additional components which are equipped with a
potential-free switching contact (room thermostat).
Remove jumper EAB and connect bipolar connecting lead
of the external controls.
Applying voltage to the external
deactivation switch connector interferes
with the controls.
External analogue signal (+10 V - GND)
The external activator is used to tell the stove how much
heat to put out (input signal: 0 – 10 VDC).
3V-30%...6V-60%...10V-100%
Applying voltages greater than 15 VDC to the
plug for the external activator interferes
with the controls.
Activate external requirement (0/1)
Activate external analogue signal (0-10 V)
The respective modes are depicted in the display by the symbols 0/1 or 0-10 V if a signal is pending from
the external controls. By pressing the stop key, this mode can be interrupted at any time. The hand symbol
appears for manual mode.
13
7 Start-up, operating mode
7.1 Filling the pellet bin
When filling the pellet bin, take care to prevent dust formation and spilling of pellets.
7.2 Functional characteristics of the heating operation
The pellet stove is designed for the automatic burning of wood pellets in domestic living spaces. That means
that the pellet stove starts up automatically and switches itself off after the selected temperature has been
reached. The controller selects the heating output based on the set-point temperature. Thus the pellet stove
provides optimised adjustment of the heat output to the current requirement.
7.2.1 Self-test
To ensure safe operation of the stove, a self test is carried out before every start-up.
7.2.2 Starting phase, pre-heating phase
In this phase, automatic ignition of the pellets is made by electrical ignition. The fire bed is prepared so that
a smooth transition to heating mode is effected.
7.2.3 Heating phase
Heating mode is fully automatic; the control adapts itself to changes resulting from burn-off loss:
• Adjustment to pellet grade used
• Adjustment to chimney or installation conditions
• Continuously variable adaptation of heat output to the set-point temperature
• Optimization of combustion in each heating phase
• Continuous monitoring of the heating operation using sensors
There is therefore no need to make any adjustments to the combustion process.
7.2.4 Cleaning phase
The heating phase is interrupted every four hours by a cleaning phase. After the cleaning, the stove returns
to the heating phase.
7.2.5 Cool-down phase:
Fuel feed is stopped in the cool-down phase and the remaining flue gases safely extracted into the chimney.
The cool-down phase is introduced after every switching off.The cool-down phase is introduced after every
switching off.
7.2.6 Standby
If the set-point temperature has been reached, the pellet stove changes over to standby mode following the
cool-down phase. In this phase, automatic restarting is possible at any time should the temperature fall
below the switch-on temperature.
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7.3 Heating mode
Start heating mode (temperature controlled)
Start heating mode with the START key.
The stove starts heating mode and switches automatically to standby mode
when the set-point temperature is reached. When the set-point temperature has
been undercut by 8.0 °C (adjustable from 55-67 °C in Start Temperature menu)
the stove automatically restarts.
Initial fill
When it is the initial operation (software update) the respective query Initial
Fill? is made before start-up.
If the OK key is pressed the auger feed is started and filled with pellets.
Change set-point temperature of flow temperature
The set-point temperature of the stove can be varied during operation using the
–/+ keys (65 - 75 °C).
Stop heating mode
Press the Stop key to discontinue the heating operation.
Turn off the pellet stove
To prevent accidental or unintentional switching off, the safety query appears:
Switch off?
Confirm with OK.
The stove must then be restarted when required.
7.4 Performance-regulated heating mode
Activate operating mode "Performance-Regulated"
• Select item Mode from the menu
• Select manual–performance
• Confirm with OK
Change performance
The heating performance can be varied during operation using the -/+ keys
(30-100 %).
The heating mode can be stopped with the Stop key.
15
7.5 Setting date / time
Date and time adjustment
• Press the Menu key in normal operating mode
• Select Date/Time - press ↓↓↓↓ key 2x
• Confirm with OK
Setting day
Press the key OK
• Set the date with the -/+ keys
• Confirm with OK
Setting month
• Move to next item with ↓↓↓↓ key
• Press the key OK
• Subsequently proceed as for setting day
• Set year, hours, minutes and seconds in the same way
7.6 Setting timer switch
Programming the timer switch
Press the Menu key in normal operating mode
Select Time switch program - press key ↓↓↓↓ 4x
Confirm with OK
Ten programable on and off cycles
are available (P01 – P10)
• Select desired program with ↓↓↓↓ key (if programings are already available)
• Confirm with OK
Programme 01
• Press the key OK
• Example: The stove heats from 4:30 until 16:00 hrs, until the desired
temperature is reached
• From Monday to Sunday
• Program the switch-on time with the -/+ keys
• Confirm with OK
• Press key +
• Program the switch-off time with the -/+ keys
• Confirm with OK
• Select the desired day with the ↓↓↓↓ key
• Allocate the switching time by pressing the OK key
• Exit the menu by successively pressing the ←←←← key.
Up to 10 switching cycles can be programed and allocated to the weekdays as required.
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7.7 External control with internal timer switch
External analogue signal (0-10 V)
Operating display stove controlled with internal timer switch.
External requirement (0/1)
Operating display stove controlled with internal timer switch.
7.8 Activating the timer switch
Activate the timer switch
• Press the Menu key in normal operating mode
• Select mode - press ↓↓↓↓ key 3x
• Confirm with OK
Press ↓↓↓↓ key 4x – timer switch is selected
Activate with key
Exit program with ←←←← key
Operating display stove in operation
7.9 Resetting to factory settings
Resetting switching times (delete)
Should re-programing of the switching times be necessary, you can reset all
programed switching times. All time programs are deleted!
• Select Reset - press ↓↓↓↓ key
• Confirm with OK
17
8 Cleaning and maintenance
Regular cleaning and maintenance of the equipment is the most important task for the customer, to ensure
years of trouble-free operation and achieve the highest possible performance, with the greatest efficiency.
The number of cleaning intervals necessary is directly dependent on the ash content of the pellets. For the
cleaning intervals described, we assume an ash content of 0.25 %. Doubling of the ash content halves the
cleaning cycles described.
Burning wood results in the depositing of a coating on the window which, dependent upon the quality of the
pellets and performance settings of the stove, can turn be white to dark. This is a natural effect of
combustion and does not represent a fault.
Attention: Risk of injury!
Before starting to clean, shut down the stove, let it cool down and disconnect the mains plug.
Use the multi-functional tool supplied - if necessary wear protective gloves - risk of burns.
8.1 After 200 kg or 14 days
Open glass door, clean the pane
• Attach the multi-functional tool
supplied and press to the left.
• Clean the cold pane with a damp
cloth.
Attention:
• Do not use any aggressive
cleaning agents.
Clean the firebox
Clean the firebox using a brush and the
vacuum cleaner for ashes.
Clean the burn pot
• Clean with the brush supplied.
• All bores and slots must always be clean.
Clean the ash-compartment
• Open the locking mechanism of the ash
pan.
• Remove ash pan and empty the ash.
• Clean out the ash compartment using the
multi-functional tool.
18
8.2 After 800 kg or annually
Open glass door, clean the pane
• Attach the multi-functional tool
supplied and press to the left.
• Clean the cold pane with a damp
cloth.
Attention:
Do not use any aggressive cleaning
agents.
Clean the firebox
Clean the firebox using a brush and the
vacuum cleaner for ashes.
Clean the burn pot
• Clean with the brush supplied.
• All bores and slots must always be clean.
Clean the ash-compartment
• Open the locking mechanism of the ash
pan.
• Remove ash pan and empty the ash.
• Clean out the ash compartment using the
multi-functional tool.
Clean the heat-exchanger
• Dismount left-hand side cover.
• Open cleaning cover top left.
• Remove cleaning springs.
• Clean heat exchanger tube with brush.
19
Clean the heat-exchanger
• Open cleaning cover bottom right.
• Remove ash using ash vacuum cleaner.
Cleaning the temperature detector
• Dismount left-hand side cover.
• Open cleaning cover top left.
• Clean off deposits using a cloth.
Clean air sensor
• Dismount right-hand side cover.
• Loosen the fixing screw.
• Carefully pull the air sensor out of the
holder. The air sensor is a delicate
measuring instrument! If there are dust
deposits, carefully blow off or clean in
distilled water.
• Carefully and without using force, push the
air sensor with the guide nose into the
holder as far as the stop.
Clean the flue-gas fan
• Remove the mains plug!
• Undo the screws of the flue-gas fan.
• Carefully pull out the motor with the
impeller and clean with a wire brush and
spatula.
• Remove ash in flue-gas duct using an ash
vacuum cleaner.
20
9 Errors - causes - remedies
Number Text on display Possible solutions
901 Safety temperature limiter has been triggered Check circulator pump
Unlock the safety temperature limiter
(info see 4.3)
902 Error maximum rpm Clean heat-exchanger,
clean burn pot, air sensor
903 Error minimum rpm of flue-gas fan undercut Check flue-gas fan, rpm sensor
904 Error minimum combustion chamber
temperature undercut
Check fuel supply
905 Error maximum combustion chamber
temperature exceeded
Check pellets (length),
inspect combustion chamber temperature
sensor
906 Error maximum circuit board temperature
exceeded
Check that heat radiation possible at the back,
replace the circuit board
907 Error minimum flow rate undercut Check stove cleaning, air sensor;
is the door, ash pan or cleaning cover open?
908 Error maximum flow rate exceeded Inspect the chimney draught
909 Error maximum chute temperature exceeded Check cleaning of combustion chamber
(chute),
check circulation pump
911 Error Maximum ignition time exceeded Check fuel supply,
check cleaning of burn pot,
check ignition
912 Error Minimum temperature cool-down time
exceeded
Check cleaning of stove
913 Error SD card Replace the SD card
replace the control panel
914 Error EEPROM Overwrite SD card again
915 Error short circuit rpm measurement Check flue-gas fan,
check rpm sensor
916 Error pallet bin switch open Close the pellet bin lid
920 Error flow sensor interruption Check room sensor (connection),
replace the sensor(s)
921 Error flow sensor short circuit replace the sensor(s)
922 Error combustion chamber temperature sensor Inspect combustion chamber temperature
sensor (connection),
replace the sensor(s)
924 Error Chute temperature sensor interruption Check chute temperature sensor (connection),
replace the sensor(s)
925 Error chute temperature sensor short circuit Replace the sensor(s)
926 Error circuit board sensor interruption Replace the circuit board
927 Error circuit board sensor short circuit Replace the circuit board
928 Error flow rate sensor Check sensor,
replace the sensor
933 Error run time userware Replace the control panel
934 Error run time firmware Replace the control panel
935 Error self-test minimum rpm Check flue-gas fan, rpm sensor
936 Error self-test minimum air Check stove cleaning,
is the door, ash pan or cleaning cover open?
937 Error acute air shortage Is the door, ash pan or cleaning cover open?
938 Error extended cool-down phase Check stove cleaning, burn pot
939 Error fuel shortage Refill the fuel
940 Error external filling run time Check silo empty, motor jammed
941 Notification to clean burn pot and grate Message after approx. 200 kg pellets
942 Error calibration air sensor MAX Calibration failed, limit exceeded
943 Error calibration air sensor MIN Calibration failed, limit undercut
21
9.1 Service request
If you request external service, please have the following data to hand:
Specialist dealer
Invoice date
Model
Serial number
Year built
Date of start-up
22
10 Technical data
Model PWS 0601-A PWS 1201-A
Controller Max3 Max3
Heating output 2.3 to 6.0 kW 2.3 to 12.0 kW
Water output Max 4.6 kW Max 10.0 kW
Height 942 mm (incl. adjustable
feet)
1100 mm (incl. adjustable
feet)
Width 502 mm 617 mm
Depth 545 mm 596 mm
Weight approx. 125 kg 165 kg
Room heating capacity* Up to 210 m³ 420 m³
Flue pipe connection Ø 100 external Ø 100 external
Fresh-air connection Ø 50 external Ø 60 external
Minimum flue draft at the connection 0 Pa 0 Pa
Recommended flue damp-proof damp-proof
Fuel content 20 kg 32 kg
Burn duration:** up to 36 h up to 45 h
Efficiency at nominal heating capacity*** 96.4 % 94.9 %
Efficiency at partial load*** 97.7 % 97.7 %
Flue-gas temperature at connection (min/max) 58 °C / 96 °C 53 °C / 112 °C
Flue gas mass flow (min/max) 2.2 g/s / 3.7 g/s 3.0 g/s / 7.0 g/s
CO2 content in exhaust gas (min/max) 6.9 Vol% / 10.9 Vol% 8.2 Vol% / 11.7 Vol%
CO content in the exhaust gas < 0.01 Vol% < 0.02 Vol%
Power connection 230 V / 50 Hz 230 V / 50 Hz
Electrical power input (without UWP) 30 to 60 W 30 to 100 W
Electrical ignition integrated integrated
Safety temperature limiter (STL) included in scope of supply
Max. operating pressure 3 bar
Required volume of combustion air approx. 30 m³/h
Approved fuel low-dust wood pellets
according to EN 14961-2 (class A1), EN plus (class A1)
( ÖNORM M7135, DIN 51731)
* Room-heating capacity varies with the quality of heat insulation and amount of ventilation.
** Burn duration varies with heat output and quality of fuel.
*** Measured under test conditions.
• Product type approved by TÜV Munich to EN 14785.
• Conforms with emission limits according to Art. 15a B-V and 1. BImSchV, stage 2.
• Regional legislation with respect to flue configuration, fire safety, place of installation, etc. should be
observed at all times.
23
10.1 Dimensions
PWS 0601-A (Model Twist 6)
24
PWS 1201-A (Model Twist 12)
27
12 Notes
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