Ariterm 35+ Manual de usuario
INSTALLATION AND
OPERATING INSTRUCTIONS
• Ariterm 35+
2
CONTENTS
General .........................................................................................................2
Installation ................................................................................................ 4-5
Installation of temperature limit valve .......................................................6
Measurements and connections .................................................................7
Technical specifications and boiler cross-section .....................................8
Operating principle ......................................................................................9
Installation of grate and ceramic parts ..............................................10-12
Operation....................................................................................................13
Heating .................................................................................................14-15
Service and maintenance ...........................................................................16
Use of alternative fuels ..............................................................................17
Warranty and removal from use ...............................................................18
Most common spare parts.........................................................................18
Declaration of conformity .........................................................................19
Notes ...................................................................................................20-23
GENERAL
e Ariterm 35+ is an economic, durable and environmentally-friendly, bottom fire, wood-
burning central heating boiler. Heating is periodic and based on storing energy in the warm
water accumulator tank. Usually this boiler is used for heating detached houses, farm buildings,
etc. Logs up to 50 cm long can be used as fuel. Light fuel oil can also be used if an oil burner is
fitted. In order to take advantage of all the features, it is important to observe the instructions
given in this booklet.
TRANSPORTATION, STORAGE AND OPENING THE PACKAGE
Receiving the goods
e boiler is delivered in a wooden frame. On the bottom is a pallet, which can be used to lift
the boiler safely. It is advisable to open the package as close as possible to the installation locati-
on. e factory insures the boiler against transport damage, which includes transport from the
factory to the first intermediate storage point. It is important that whoever receives the boiler
should check its condition before accepting it. In cases of damage, the seller must be contacted
immediately.
Storage
e boiler can be stored in the open air if protected from rain, but storage indoors is recom-
mended.
Opening the package
After opening the package, open up all the hatches and check the equipment list to see that all
loose equipment has been supplied.
Disposal of packaging: plastic cover to the refuse tip, wooden planks can be burned.
4
INSTALLATION
Installation of the boiler can only be done by a company or individual with the necessary pro-
fessional accreditations. Installation should be performed so that it meets the generally accepted
laws and regulations applicable to the industry. Electrical installation work must be done only
by a qualified electrician.
Space requirements
An area of 1 metre must be reserved in front of the boiler for cleaning and maintenance pro-
cedures. Above the boiler, a space at least as high as the height of the boiler must be reserved for
convection.
Flue connection and combustion air opening
Flue requirements for Ariterm 35+:
• Steel flue: height at least 4 m from the floor of the boiler room to the top of the flue, inner
diameter at least 150 mm
• Brick flue: height at least 4 m, free cross-sectional area at least 290 cm2
• For already existing flues, check the fire-technical suitability of the flue from your local fire
safety authority.
e free surface area of the combustion air opening must be about the same size as the flue.
is opening must never be covered.
Plumbing connections
Ariterm 35+ is intended for use with an accumulator tank. Before installation of the boiler, the
heating system must be flushed and a water pressure test carried out. e tightness of the con-
nections must be ensured before installation. e factory is not responsible for damage caused
by leaking connections.
Safety vent installation
e vent must be CE-approved with a maximum opening pressure of 1.5 bar and a minimum
size of DN 15. e safety vent must be selected according to the highest pressure class of the
equipment assembly. No equipment may be installed between the vent and the boiler, as this
may interfere with the connection. e exhaust pipe must be dimensioned and installed so that
it neither restricts the exhaust efficiency of the vent, nor causes a hazardous situation when the
vent is in operation. e volume of the expansion tank must correspond to the greatest change
in fluid volume that occurs when the equipment is in use. In periodic heating, the expansion vo-
lume must be about 10% of the overall system volume. We recommend the use of only a closed
system (film expansion vessel).
5
e water returning to the boiler must be about 70°C. is is achieved by using a bypass con-
nection in accordance with the circuit diagram. In order to maintain a sufficiently high tempe-
rature during the heating period, the convection surfaces should be kept clean, to ensure highly
efficient burning. e life expectancy of the boiler will also be increased, because corrosive acids
will not be created on the heating surfaces.
INSTALLATION
Part Name
1Ariterm 35+ boiler
23-way valve, underfloor heating
33-way valve, radiator heating
4Heat supply pump, underfloor heating
5Heat supply pump, radiator heating
6Underfloor heating system manifold
7Radiator heating system
8Expansion vessel
9Service shut-off valve
10 Safety vent
11 Refill valve
12 Input mixing valve
13 Process water circulation pump
14 Thermal safety device
15 Accumulator switch
Laddomat 21 (LVI-5012912)
16 Warm water accumulator
Connection to boiler top
Ball check valve 1 ¼” IG
Internal thermal valve
Internal pump Wilo RS 25-6/3
Thermometer
Connection to accumulator
tank bottom
Automatic cycle valve
in case of power cut
Easy-to-clean dirt pocket to
prevent operating errors
Connection to boiler bottom
Thermometer
Filling connection R15
Ball check valve 1 ¼” IG
Thermometer
Ball check valve 1 ¼” IG
6
INSTALLING THE TEMPERATURE LIMIT VALVE
e Pressure Vessel Directive requires that a manually-filled wood-burning boiler must be
equipped with a safety device, which prevents the boiler from overheating if circulation in the
accumulation tanks is prevented for some reason. e Ariterm 35+ boiler includes a cooling
spiral. We recommend the SYR 3065 temperature limit valve for this boiler. is does not, ho-
wever, replace other safety devices such as a safety vent.
Installation
e temperature limit valve is connected to the cooling spiral or to the fork-junction in the
warm process water pipe so that when the valve operates, it sends hot water down the drain.
e temperature sensor is installed on the sleeve on the upper part of the boiler, using a DN 20
x 150 well.
TECHNICAL SPECIFICATIONS
Max. input water pressure 10 bar
Opening temperature 97° C
Valve available from Ariterm Oy Product no. 5012921
7
DIMENSIONS AND CONNECTIONS
Part Name Unit
1Turning plate adjustor
2Water pressure gauge
3Water thermometer
4Combustion gas thermometer
5Firebox hatch
6Primary air damper
7Secondary air damper
8Refill hatch
9Convection cleaning hatch
10 Convection ash removal hatch
Part Name Unit
11 Fixed hatch for afterburning chamber
(hinged service hatch an option)
12 Safety valve connection DN 20
13 Water accumulator outlet DN 50
14 Water accumulator return DN 50
15 Expansion unit DN 25 outer thread
16 Blow-off unit DN 15
17 Cooling spiral units Cu 15
18 Flue connection 168
19 Flue gas fan (A35-121D)
20 Boiler water temperature sensor pocket
8
TECHNICAL SPECIFICATIONS / BOILER CROSS-SEC
TION
TECHNICAL SPECIFICATIONS
Performance values: Power 20 - 40 kW
Measurement data:
Width
Depth
Height
Weight empty
Water capacity
Storage chamber volume
Burning time
Size of refill opening
Chimney recommendation
800 mm
1109 mm
1300 mm
690 kg
150 L
120 L
37 kg / 3 h
550x350 mm
150 mm, 4 m
Design and adjustment values:
Boiler operating pressure
Permitted operating temperature
Suitable size of accumulator
Max. length of logs
0,5-1,5 bar
Max 120 °C
1800 – 3000 L
0,5 m
afterburning
chamber
convection
section
storage chamber
grate
direct damper
9
OPERATING PRINCIPLE
e Ariterm 35+ boiler is meant for use at full power, then complete gasification of the wood
will take place and the combustion will be clean. e amount of energy available from the boiler
to the accumulator will be optimal and the need for cleaning small. e boiler will also last lon-
ger with proper burning.
Wood gasication
is takes place at the grate at the bottom of the storage chamber. e primary air needed for
gasification rises through the plate-controlled damper to the carbonisation section, where the
wood gasifies. e refill hatch is inclined at an angle, so loading the wood into the storage cham-
ber is easy and safe. Gas-powered dampers make hatch opening easy. e storage chamber ex-
pands as it goes further down, so is wide enough to ensure that wood does not get stuck against
the chamber walls. e chamber has a volume of 120 litres, which will accommodate about 37
kg of dry firewood. Burning time is three hours without having to add more wood, and the tem-
perature in a 2000-litre accumulator will rise by about 50°C, if no heat is being used at the same
time.
Afterburning of gases
is takes place in a round ceramic chamber, into which pre-heated secondary is introduced.
Adjustment of the secondary air is done using the lower damper. e key factor in clean com-
bustion is the complete mixing of combustion gases and pre-heated combustion air at a high
temperature. In the afterburning chamber, the temperature rises to almost 1000°C, at which
point different gases emitted from the wood ignite and are completely burned. e afterburner
chamber is a vertical cylinder and is made of ceramic parts.
Heat recovery
is takes place in the carefully dimensioned convection section, in which heat is efficiently
transferred from the super-heated combustion gases to the boiler water. e convection section
is vertical, so that fly-ash does not accumulate on its inner surfaces. Regular brushing of the con-
vection section keeps the boiler efficient.
10
It is advisable to carry our installation with the assistance of somebody else. Clean the boiler
well and carefully remove any pitch that may have accumulated, so that the parts will fit into
place. e grate should be installed before the ceramic parts through the firebox hatch, so that
the denser part of the grate goes backwards. Take care as the grate weighs about 50 kg.
e bricks should be installed through the opening at the side in the following order:
1. Lower brick
2. Lower parts of side brick
3. Lower part of front brick
4. Lower part of rear brick
5. Upper part of rear brick
6. Upper parts of front brick. e upper parts support each other with a suitably sized piece
of wood in between, for example.
7. Upper parts of side brick (2 pcs) (pay attention to left-or right-handedness). Remove the
temporary support then installation is complete.
INSTALLATION OF THE GRATE AND CERAMIC COMPO-
NENTS
1. Lower brick 2. Lower part of side brick (2 pcs)
2. Lower part of side brick (2 pcs) 3. Lower part of front brick
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