Wallnofer Walltherm Operating Instructions Manual
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OPERATING MANUAL:
Instructions for use & maintenance of the
Walltherm® Version / 12.1
The first natural down-draught wood gasification stove
for the living room.
Dear stove-owner,
You have made an excellent choice purchasing the Walltherm® stove/boiler for
your living room. Especially in connection with a heat storage tank, it offers you
all the advantages of a radiant heat stove for the living room and furthermore,
an economical heating system for your whole house. Please study this manual, it
explains how the stove works, how you should operate it and how it has to be
maintained.
For further information, please contact the manufacturer or any authorized
Walltherm dealer
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! In any case the laws and norms valid in the installation country
have to be respected.
This stove has been developed for the following uses:
due to the contemporary design and the visible fire it can be perfectly put up in the living
room
heating of the living room through radiant heat
heating of distant rooms with water based radiators, underfloor- or wall heating from the
boilerDHW through the hot-water tank/store
integrated hotplate for cooking and therefore ideal for holiday homes
THEREFORE: the requirements for the complete heating of an average country house
are covered (heating of rooms and domestic hot water)!
FEATURES OF THE STOVE:
two times visible fire through temperature resistant glass
rapid heating due to big radiant surfaces
boiler function with integrated heat exchanger
wood-burning system, consequently economical and clean burning
small hotplate for cooking
GENERAL INFORMATION:
PURPOSE:
The Walltherm® stove has been developed for the optimal burning of air-dried natural
wood, wood chips and (partly) briquetts. Do not burn any wood/paper/cardboard that
has been painted or colored, not should you use barbecue igniters or coals because
anything that isn´t natural wood can produce acids while burning. Those acids can
damage the stove and the heat exchanger!
The stove must not be used for burning any other
materials including coal or waste.
The heater (wood gasification stove) Mod. Walltherm®, invented by the company
Wallnöfer H.F. GmbH, complies with the Machine- and Safety Regulations of the
European Union guideline 98/37/EWG and consequent amendments. The stove has been
tested and registered by BLT-Wieselburg (AUT), VKF (Switzerland) and TÜV
Rheinland (GER).
This operation manual is directed at the owner of the stove Mod. Walltherm, the
tradesman who installs it, the operators, and the service personell.
In any case of doubt or for further information concerning the manual, please contact the
producer or any authorized Walltherm dealer. Please quote the number of the paragraph
and name the topic in question.
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This operating manual is protected by copyright and it (or any part thereof) must not be
printed, copied or reproduced without prior consent of Wallnöfer H.F. GmbH.
Technical information, graphics, and specifications included in this manual must not be
published/distributed.
The principle of the double combustion and its advantages
Generally: In a wood burning stove, a correctly burning flame emits the same amount
of carbon dioxide (CO2) as would be emitted through the natural decomposition of the
wood itself.
The quantity of CO2 produced by combustion or decomposition of a tree is equal to the
quantity of CO2 that the tree would have extracted from the environment, releasing
oxygen into the air whilst utilising the carbon for growth during its lifetime.
Unlike wood, when fossil fuels are burned – which are not renewable, like coal, diesel oil,
gas – a huge amount of CO2 accumulated in the course of millions of years is emitted
into the atmosphere, increasing the green-house effect. Consequently, the use of wood
as fuel maintains the perfect equilibrium of nature because it is a renewable fuel of which
burning is compatible with nature’s life cycle.
The principle of clean combustion is in perfect harmony with these characteristics and
Wallnöfer H.F. GmbH always adheres to it when designing their products.
Double combustion: What exactly do we mean by
clean double combustion and how does it work? By
controlling the flow of primary air and by adding
secondary air, secondary combustion, or postcombustion, takes places. This is indicated by a
second characteristically clearer and stronger flame
below (?) the main flame. By adding new oxygen,
this flame consumes the unburned gasses,
remarkably improving heat production and reducing
the harmful emission of CO (carbon monoxide)
caused by incomplete combustion. This is a unique
feature of the Walltherm stove for the living room.
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Index
1) Introduction
1.a. Symbols
1.b. Intended use
1.c. Purpose and contents of the
manual
1.d. Keeping the manual
1.e. Updates of the manual
1.f. General information
1.g. Main accident prevention
regulations to comply with
1.h. Guarantee
1.i. Manufacturer’s liability
1.j. User characteristics
1.k. Technical assistance
1.l. Spare parts
1.m. Identification plate
1.n. Delivery of the stove
2 Safety Instructions
2.a. Instructions for installers
2.b. Instructions for users
2.c. Instructions for maintenance
engineers
3 Parts list for the stove
3.a. Parts
4 Handling and Transport
5 Preparing the place of
installation
5.a. Safety precautions
5.b. Combustion
5.c. Preparing the place of
installation
5.c.1. Limitation of space around the
stove
5.c.2. Limitation of space above the
stove
5.c.3. Combustion air
5.c.4. Smoke outlet pipe
6 Installation
6.a. Leveling the stove
6.b.1 Connecting Electricity
6.b.2 Earthing
6.c. Important information
6.c.1. Doors
6.c.2. Thermal safety drain
6.c.3. Circulation pump
6.c.4. Density
6.c.5. Permissible max/min
temperatures
6.c.6. Cleaning
7 Using the stove - Lighting
7.a. Control
7.b. Lighting phase
7.c. Loading the fuel
7.d. Permissible and suited fuels
8 Maintenance and cleaning
8.a. Safety precautions
8.b. Routine maintenance for the
user
8.b.1. Cleaning the stove
8.b.2. Cleaning the glass
8.b.3. Cleaning the smoke outlet
8.b.4. Controlling seals
9 Recognizing errors and taking
measures against faults
10 Saving energy
11 Concept of water pipes
12 Safety functions
13 Technical features/data
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!
1. Introduction
Do not install or use the stove before you have read and understood the contents of this
manual. In case of doubt at any time do not hesitate to contact Wallnöfer H.F. GmbH for
information.
Wallnöfer H.F. GmbH reserves the right to modify the technical and/or functional
specifications and features at any time without prior notice.
1.a. Symbols
Important points in this manual are highlighted with the following symbols:
Indication: indications concerning the correct use of the stove and the
responsibilities of those using it.
Attention: a particularly important note is written here.
Danger: Here you are warned of the possibility of bodily harm or material
damages.
1.b. Use of the stove
Walltherm is an innovative, technologically advanced stove for heating, burning fuels like
firewood and wood briquettes providing a healthy and safe way of heating.
This stove features the dual primary and secondary combustion system with positive
effects both on efficiency and on emission of “cleaner smoke”.
The application of the stove and its configurations as described above are the only ones
permisable by the manufacturer. Do not use the stove in disagreement with the
instructions provided.
The described use of the stove is applicable only for stoves in full structural,
mechanical and engineering condition.
The Walltherm, produced by Wallnöfer H.F. GmbH, must only be used indoors.
1.c. Purpose and contents of the manual
Purpose
The purpose of the manual is to provide the operator with the fundamental knowledge to
allow the user to take the necessary precautions and to have all the human and material
resources required for its correct, safe and lasting use.
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Contents
This manual contains all the information necessary for installation, use and maintenance
of the Walltherm stove. By complying scrupulously with the contents of this manual you
will ensure a high degree of safety and productivity of the stove.
1.d. Keeping the manual
Keeping and consulting the manual
The manual must be kept in a safe, dry place and be available at all times for
consultation by the user and by those who see to its installation and maintenance.
The manual with its instructions for operation and maintenance is an integral part of the
stove.
Deterioration or loss
If required, ask Wallnöfer H.F. GmbH for another copy of the manual.
Selling the stove
If the stove is sold, the user must give the manual to the new owner.
1.e. Updating the manual
This manual reflects the state-of-the-art at the time the appliance was put on the
market.
1.f. General information
Information
If there is an exchange of information with the stove manufacturer, please quote the
serial number and identification data which you will find on the stove’s identification
plate.
Liabilities
Upon delivery of this manual Wallnöfer H.F. GmbH declines all liabilities, both civil and
penal, for any accidents that may derive form the total or partial failure to comply with
the specifications contained in it.
Wallnöfer H.F. GmbH also declines all liabilities resulting from an improper use
of the stove, incorrect use by the user or resulting from unauthorised
alterations and/or repairs, or the use of spare parts that are either not
genuine or not specific for this particular model.
Extraordinary maintenance
Extraordinary maintenance must be carried out by personnel qualified to work on the
stove model to which this manual refers.
Responsibility for installation
It is not the manufacturer’s responsibility to carry out the works
needed to install the stove. Such works are entirely up to the installer who is
requested to check the flue and air intake and to check if the installation
solutions proposed are feasible. In addition, all the safety standards
established by the relevant law in force in the place of installation must be
complied with.
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Use
Use of the stove is subject to compliance with all the safety standards established by the
relevant laws in force in the place of installation besides the prescriptions contained in
this manual.
1.g. Main accident prevention regulations to comply with
a) EEC directive 73/23: “electrical material for use within certain voltage limits”.
b) EEC directive 89/336: “grouping of the laws of the member states relative to EMC”.
c) EEC directive 89/391: “putting into practice the measures to promote improvement
of the safety and health of workers during their working hours”.
d) EEC directive 89/106: “concerning the grouping of legislative, regulating and
administrative guidelines of the state members on the subject of construction
products”.
e) EEC directive 85/374: “concerning the grouping of legislative, regulating and
administrative guidelines of the state members on the subject of liability for
damages due to faulty products”.
1.h. Legal guarantee
Wallnöfer H.F. offers 5 years of guarantee for the body of the Walltherm, exclusiv spare
parts like combustion jets, grid, glass, seals, cat, fireclay.. For all the valves an other
components the user may only make use of the legal guarantee, as under the EEC
directive 1999/44/CE, if he has scrupulously complied with the regulations indicated in
this manual, and more specifically:
to work always within the stove’s range of use
maintenance must be constant and accurate
only allow people who are capable and who have been suitably trained to use the
stove.
Failure to comply with the regulations contained in this manual will invalidate the
guarantee immediately.
In any case of possible legal guarantee the installation of the stove must have been
carried out by people who are capable and who have been suitable trained to use the
stove. Furthermore, a copy of the installation record has to be delivered to Wallnöfer H.F.
GmbH.
Wallnöfer informs that the following cases aren`t query reason:
Fireclay:
Because of the high temperature loading, the fireclay can get cracks, in this case it isn`t
necessary to exchange the components, the isolation function is still ensure. The
exchange is only necessary if the fireclay falls apart.
Noise:
Until the warming and cooling phase of the body made of steal it is normal that you hear
some noise.
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Coating:
Please control the external coating before you install the Walltherm, when you find defect
parts please contact immediately your reseller.
After the installation of the Walltherm we can only resolve the problem with sprays.
To avoid coating problems during the operation please take note of the following tips:
a) Please clean the external parts only with water and soap, do never use alcohol or
similar agressiv cleaning liquids.
b) To protect the upper side of the Walltherm® please close the exhaust fume flap
(5) when the gas temperature reaches about 300 - 350°C. (look chapter: 7 Using
the stove – Lighting)
Cooking plate and doors:
Because of the high temperature loading, the colour of the doors and the cooking plate
will change. When you grid of this parts you can get the origal colour.
1.i. The manufacturer’s liabilities
The manufacturer declines all civil and penal liabilities, direct or indirect, due to:
an installation that fails to comply with the laws in force in the country and with the
safety rules and regulations;
failure to comply with the instructions given in the manual;
an installation by unqualified and untrained personnel;
use that fails to conform to the safety directives;
alterations and repairs on the appliance not authorised by the manufacturer;
use of spare parts that are either not genuine or specific for this particular model;
lack of maintenance;
exceptional events.
1.j. User characteristics
The person who uses the stove must be an adult and responsible, with al the necessary
technical know-how to carry out routine maintenance of the mechanical and electrical
components of the stove.
Do not let children near the appliance to play with it when it is working.
1.k. Technical assistance
Wallnöfer H.F. GmbH is able to solve any technical problem concerning the use and
maintenance of the appliance’s whole life cycle. The main office will help you find the
nearest authorised assistance centre.
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Abb.1 .m
1.l. Spare parts
Use genuine spare parts only!
Do not wait until the components are worn from use before changing them.
Changing a worn component before it breaks makes it easier to prevent accidents that
could otherwise lead to serious harm to people or damage to things.
Carry out routine maintenance checks as described in the “machine
maintenance and repair” chapter!
1.m. Identification plate
The plate shown in fig. 1 m can be found on the stove’s left and gives all the machine’s
features including the manufacturer’s data, serial number and CE marking relative to the
electrical system.
1.n. Delivering the stove
The stove is delivered accurately packed in cardboard and fixed to a wooden pallet so it
can be handled by elevator trucks and/or other means.
You will find the following items inside the stove:
use, installation and maintenance manual;
cleaning brushes for the vertical and horizontal flue and air intake
a brush for the ashes
a fire hook
a cold handle for pulling the hearth out;
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2. Safety Precautions
2.a. Instructions for the installer
comply with the indications given in this manual
check that the flue and air intake are suitable for the type of installation opted for
(12 pa draft)
the electrical connections must not be done using temporary or non-insulated leads
make sure the electrical system’s earthing is effective
always use individual safety devices and other protections means.
2.b. Instructions for the user
the stove must not be used without having it filled with water
Since the stove is an appliance that heats, its outer surfaces can get very hot. For
this reason we advise maximum caution when it is working, in particular:
not to touch or go near the glass door as you could get burnt;
not to touch the flue and air intake;
not to do any type of cleaning;
not to pull out the ashes;
not to touch the lower glass door;
make sure that children are kept away.
comply with the indications given in this manual
comply with the instructions and warnings given on the plates on the stove
these plates are accident prevention devices and as such must be easily and
perfectly illegible it; it is compulsory to change them, asking the manufacturer for
an original plate
only use fuel that complies with the indications given in the chapter referring to fuel
characteristics
keep strictly to the routine and extraordinary maintenance programme
do not use the stove if there is a malfunction, a suspicion of breakage or unusual
noises
do not throw water on the stove when it is lit or to put the fire out in the hearth
do not clean the stove until the structure and ashes are completely cold
all works must be carried out in maximum safety and calmly.
2.c. Instructions for the maintenance engineer
comply with the indications given in this manual
always use individual safety devices and other protection means
before embarking on any maintenance work the stove must be completely cold
even if only one of the safety devices is incorrectly calibrated or not working, the
stove is to be considered “not working”
the electricity must be disconnected before any work is done on switches and
connectors.
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3. Parts list of the stove
3.a. Spare parts/components
1 Upper combustion chamber
2 injektor block with secondary air feed
2a Secondary air knob
2b Grid
3 Lower combustion chamber (gas combustion tunnel)
3a Door with glass to lower combustion chamber
4 Smoke channels
4a Stove pipe flange with thermometer
4b Horizontal smoke channels
4c Opening with lid for access to smoke channels for cleaning
4d Adjustable lid for smoke diversion
5 Exhaust fume flap (function: lever in horizontal position = flap closed, lever
pointing down = flap open)
5a Smoke baffle with opening and cover for hotplate (cooking)
6 Combustion air intake channel to upper and lower cross channel
6a Air inlet with thermostatically controlled flap
6b Safety thermostat for control of combustion air intake
7 Thermostatically controlled 3-way valve set to open at 60°C – 70 °C
7b Circulation pump
7c Thermometer
8 heat exchanger
8a Thermostat/sensor for pump on/off control
8b Safety valve to 3 bar for draining how water in case of overheating
8c heat exchanger (lance) for cooling with connections for cold water intake and hot
water outlet
8d Bleeder valve. Attention: when connected to unpressurised system use this stove
connector
8e Valve for thermal safety drain
8f Probe/sensor for safety drain
9 Cooking plate
10 Door to upper combustion chamber
11 Pressure gauge
N.B. The best position of the pump group (Pos 7, 7b, and 7 c) including 3-way valve is at
the storage tank in utility area.
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!
Front view top view
Parts list of the stove:
4 Handling und Transport
Der Ofen wird mit allen vorgesehenen Teilen geliefert.
Der Schwerpunkt des Heizofens liegt im hinteren Bereich.
Dies ist auch beim Verstellen des Heizofens auf seinem Transport-
Untergestell zu beachten.
Gefahr: Sicherstellen, dass die Belastbarkeit des Hubstaplers über
dem Gerätegewicht liegt. Der Bediener der Hebevorrichtung hat
die gesamte Verantwortung für das Anheben der Lasten.
Fig. 3.a.3 Fig.3.a.4 Fig.3.a.5
Vorlauf (Heizkreis) = how water outlet (heating circuit)
Rücklauf (Heizkreis) = cold water inlet (heating circuit)
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Top view
Front view
View from
right side
Backside
All
dimensions
are in mm
View from under the
stove
Air intake from under the stove
Chimney muff
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A Security heat exchanger
B Sensor thermal safety drain
C Overpressure valve
D Thermostat(sensor
E Forward flow
F Thermometer
G Thermostat for air intake
H Pressure gauge
I Backflow
J Fume sensor
I Forward flow
II Backflow
III Cold water
IV Drain for thermal safety
V Drain for overpressure valve
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