Varmebaronen Vedolux 37 Installation and operating instructions

Installation, operation and maintenance
Vedolux 37
08-03 ver. 3 (RVR 0811)
From serial no
VB THL product no
Arkelstorpsvägen 88 , 291 94 KRISTIANSTAD
Tel [phone] , Fax [phone]
[e-mail] ww.varmebaronen.se

2
2008-03
Vedolux 37 Contents
Function................................................................. 2
Technical data....................................................... 3
Installation ............................................................ 4
General
Chimney
Flue pipe
Flue gas thermometer
Connection to accumulator system
Function of accumulator control
Shunt valve
Expansion system
Cooling coil – temperature limiter
Radiator pump
Filling the heating system
Turbulators
Bracket for cleaning tool
Draught hatch
Pellet burner
Oil burner
Electrical connection............................................ 6
General
Electrical connection
Wiring diagram and control panel ........................ 6
Function
Checks ................................................................... 7
General
Checks
Firewood ................................................................ 7
Firewood as a fuel
Firewood
Heat content
First burning cycle
Function
Vedolux 37
• is a rewood boiler with a suction fan, designed for heating
houses and smaller properties.
• is environmentally-approved for rewood burning with an ac-
cumulator tank.
• is designed for half metre rewood.
• is designed to be connected to an external water heater.
• is primarily designed to be red by rewood, but can also eas-
ily be modied for use with an oil or pellet burner.
• has an output of 37 kW when burning rewood and 50 kW
when burning oil/pellets.
Ceramic combustion chamber
The combustion chamber is designed for reverse combustion.
The depth of the combustion chamber is 550 mm. A bypass
damper prevents smoke entering the room when rewood is
added.
Flue cleaning
All flue ducts in the boiler are cleaned from the same hatch at
the front of the boiler. The hatch is hinged and is opened with a
single operation. The flue ducts are round, which means there
are no awkward corners when flue cleaning.
Chimney
The Vedolux 37 has a suction fan minimising the chimney re-
quirements of the boiler.
Accumulator tank
To optimise combustion and efciency, and to meet environ-
mental requirements relating to rewood burning, the boiler
must be connected to an accumulator tank. The accumulator
tank is dimensioned according to the requirements of the build-
ing.
Delivery
The product is delivered with the following components:
•flue pipe.
•flue cleaning tool with bracket.
•flue gas thermometer.
•drain valve.
•gas lighter.
Accessories
• base frame to make rewood burning more convenient.
•Accumulator Control 3.
• accessory for oil/pellet ring (cover plate with draught hatch for
fan).
Firewood as a fuel................................................. 8
Startup
First burning cycle
Lighting – start
Lighting a re with the gas lighter
Adding wood
Bypass damper
Controlling combustion
Inner ash hatch
Flue cleaning ......................................................... 9
General
Cleaning the boiler
Chimney sweeping
Cleaning the fan
Operation and maintenance............................... 10
Ceramic – combustion tunnel
Safety valves
Venting
Water pressure in the system
Unvented expansion system
Overheating protection
If there is a risk of freezing
Draining the boiler
Boiler cleaning
Pellet burner
Oil burner
Problems burning firewood................................. 11
Component specification.................................... 12

3
2008-03 Vedolux 37
A
1552+20 -0
343+20 -0
1223
1566+20 -0
1763+20 -0
211
145
930
531
97+20 -0
870
1209+20 -0 22
181
133
1311
1203
A
2
3
8
9
10
11
12
13
14
1
1
1
2
2
13
5
7
18
19
18
4
C
15 4
16
17
Minimum distance of 200 mm
between rear of boiler and wall
Vedolux 37 with base frame
and flue pipe straight up V37
Vedolux 37 with standard flue pipe
Technical data
1. Hot water outlet, riser, R32.
2. Hot water outlet, return, R32.
3. Flue pipe, standard.
4. Fan motor.
5. Bracket for cleaning tool.
7. Upper cleaning hatch.
8. Control for bypass damper.
9. Firewood hatch.
10. Ash hatch/draught hatch.
11. Draining.
12 Base bolts, adjustable.
13. Connections for cooling coil, 15 mm Cu.
14. Expansion connection, R25.
15. Electrical connection, supply, 230V~.
16. Electrical connection, fan.
17. Electrical connection, circulation pump for accumulator charging.
18. Flue pipe straight up, with socket, R25, for support pipe, accessory.
19. Base frame, accessory.
The manufacturer reserves the right to make changes without notice.
Rear side with fan and electrical connections
C
Weight empty 320 kg
lled with water 440 kg
Volume 120 litre
Design pressure 1.5 bar
Test pressure 2.15 bar
Pressure drop water ow 0.54 l/s 10 mbar
Design temperature 110 °C
Operating temperature max 110 °C
Output wood moisture 16 ±4% 37/42 kW
oil 50 kW
pellets 42 kW
Combustion chamber volume 105 litre
depth 550 mm
Length of wood 500 mm
Wood diameter 150 mm
Burning cycle combustion chamber full,
moisture 16 ±4%
2.5-3 h
Firewood hatch w x h 290 x 235 mm
Chimney requirement height min 3.5 m
ue duct recommended Ø 145 mm
165 cm2
ue duct min Ø100 mm
79 cm2
draught 10 Pa
Flue gas temperature °C
Flue gas quantity kg/s
Boiler group as per EN 303-5 3

4
2008-03
Vedolux 37
• Boiler installation must be carried out in
accordance with the Regulations for New
Buildings [Nybyggnadsreglerna] and the
Hot Water Instructions [Hetvattenanvisn-
ingarna].
• The boiler must be installed indoors in a
cellar or on the ground oor. The instal-
lation site must be able to support the
combined weight of the boiler, the ac-
cumulator tank and any chimney.
• The boiler can support up to 250 kg of the
weight of the chimney.
• Adjust the base bolts to make the boiler
level.
• A temperature limiter must always be
installed with the boiler.
• The boiler must be connected to an accu-
mulator tank, and the installation must include an accumulator control.
• You must contact the chimney sweep before changing to a different form of
energy.
• Contact the municipality to nd out about restrictions on the use of solid
fuels in built-up areas.
• The fresh air intake of the boiler room must have at least the same cross
sectional area as the chimney, and it must be designed so it is impossible to
close it by mistake.
Chimney
The Vedolux 37 has a suction fan minimising the chimney require-
ments.
If the boiler is connected to the chimney higher up than the previ-
ous boiler, the lower, unused, part must be lled.
Flue pipe
The boiler is supplied with an angled flue pipe – a flue pipe for
steel pipe is available as an accessory. The flue pipe can be
turned, and is xed with four bolts. If the angle is not correct
initially, the bolts can be inserted in alternative locations. Do not
forget the washers. See also the diagram on the next page.
Chimney
Height: min 3.5 metre
Flue duct:
Recommended: Ø 145 mm 165cm2
Min: Ø 100 mm 79cm2
Draught: min 10 Pa
F
i
l
l
e
r
Flue gas thermometer
The supplied ue gas thermometer is tted to the removable
plate at the front of the flue pipe, in the predrilled and threaded
hole.
Connection to accumulator system
The boiler must always be connected to an accumulator tank with
an accumulator control.
The accumulator volume is dimensioned according to the sur-
face area to be heated. Allow for 8 – 10 litres of tank volume per
square metre of heated surface area.
The schematic diagram below shows the Vedolux 37 with the
Aqualux and Aqualux UB accumulator tanks plus Accumulator
Control 3. For more details, refer to the documentation supplied
with the relevant product. Follow the installation instructions in the
documentation.
The pipe dimension between the boiler and the tank should be
28/35 mm for copper pipe or equivalent.
Function of accumulator control
The accumulator control ensures that the boiler reaches a high
working temperature before it starts charging the accumulator
tank. It also prevents the return temperature to the boiler falling
too low, helping to minimise the risk of condensation in the com-
bustion chamber.
The charging pump of the accumulator system is controlled by a
ue gas thermostat. When the ue gas temperature reaches the
value set on the thermostat, the pump starts running, circulat-
ing hot water from the top of the boiler, through the accumulator
control, and back to the return connection on the boiler.
When the boiler temperature reaches around 70°C, some of
the hot water from the top of the boiler is circulated to the top
of the accumulator. Cold water is taken from the bottom of the
accumulator and is circulated to the accumulator control, where
it is mixed with hot water from the top of the boiler to prevent the
return temperature to the boiler falling below 72°C. This creates
pronounced temperature stratication in the tank.
To prevent the accumulator water cooling down unnecessarily,
the flue gas thermostat stops the charging pump when the flue
gas temperature falls below the specied value.
A non-return valve in the accumulator control prevents unwanted
natural circulation when the charging pump is not running.
Shunt valve
The Vedolux 37 does not have a shunt valve to control the tem-
perature to the heating system. In Värmebaronen systems, the
valve is tted to the accumulator tank with water heater, Aqualux
CU.
VENTED SYSTEM
VENTING
UNVENTED
SYSTEM
cold water
hot water
riser
return
immersion heater
isolating valve
automatic bleed valve
Installation
Chimney
Location of
boiler
Flue gas thermometer
Bracket for
cleaning tool

5
2008-03 Vedolux 37
Installation
You are recommended to equip the shunt with a system for
automatic shunt control. The benets of automatic shunt control
include constant temperatures in the building, the option of night-
time temperature reduction, better use of the accumulated heat,
etc.
Expansion system
The boiler is connected to a vented or unvented expansion
system.
The volume of the expansion vessel is dimensioned according to
the circumstances. The guideline values for volume are approx.
5 % of the total system volume for vented systems, or 13- 15 % for
unvented systems.
Vented The distance between the top of the highest radia-
tor and the expansion vessel must be at least 2.5
metres in order to prevent oxygen saturation of the
water in the heating system.
The expansion vessel is connected in a continuous
and unisolatable rise from the boiler's expansion
connection.
To prevent damage occurring if the expansion
system fails, for example because of freezing, the
boiler should be tted with a type approved safety
valve, 1.5 bar.
Unvented In unvented systems, the boiler must be tted with
a type approved safety valve, 1.5 bar, connected
using an unisolatable pipe from the connection at
the top of the boiler, as well as a bleed valve.
The expansion vessel is best connected using 15
mm Cu pipe, as shown in the diagram on the previ-
ous page.
Cooling coil - temperature limiter
The boiler system must be equipped with a temperature limiter in
accordance with the Hot Water Instructions [Varm- och Hetvat-
tenanvisningarna].
The boiler has a cooling coil which, combined with a suitable
thermal valve, is used to reduce the boiler temperature if the wa-
ter boils. Follow the instructions of the valve manufacturer when
installing the valve.
Radiator pump
The radiator pump is dimensioned according to the size, pipe
dimensions and design of the system.
Filling the heating system
The boiler must be tted with valves for lling and draining. For
lling, the shunt valve must be fully open.
Turbulators
The ve turbulators are installed in the ue gas pipes as shown
in the diagram. The purpose of the turbulators is to introduce
turbulence to the flue gases, causing more heat to be trans-
ferred to the boiler water.
If the flue gas temperature falls too low, there is a risk of con-
densation in the flue duct. To increase the temperature, the
three upper turbulators can be removed, or cut to a length that
produces a suitable flue gas temperature.
Bracket for cleaning tool
The bracket for the cleaning tool can be tted to either side of the
boiler or any suitable place close to the boiler.
Draught hatch
An extremely high chimney and/or strong winds can create a
draught that is strong enough to allow combustion with the fan
turned off. The solution is to install a draught hatch, which can
reduce the draught to 10-15 Pa.
Pellet burner
The Vedolux 37 is primarily designed to be red by rewood, but
can also be modied for pellets using a pellet burner. The burner
is tted to rewood hatch.
When the pellet burner is installed, the accessory for oil/pellet
ring must be used (cover plate with draught hatch instead of the
fan).
Because of the risk of condensation you should monitor the flue
gas temperature. Check that the flue gas temperature is appro-
priate for the chimney type.
The boiler temperature should not be allowed to fall below 70°C.
Otherwise, follow the instructions of the burner manufacturer.
Oil burner
The Vedolux 37 is primarily designed to be red by rewood, but
can also be modied for oil ring.
When the oil burner is installed, the accessory for oil/pellet ring
must be used (cover plate with draught hatch instead of the fan).
The output of the oil burner must be compatible with the output
range of the boiler.
Because of the risk of condensation you should monitor the flue
gas temperature. Check that the flue gas temperature is appro-
priate for the chimney type.
The boiler temperature should not be allowed to fall below 70°C.
Otherwise, follow the instructions of the burner manufacturer.
3
2
30
31
30
31
Fitting the flue pipe.

6
2008-03
Vedolux 37 Electrical connection
Wiring diagram and control panel
Installation must be in accordance with the High Current Regulations
[Starkströmsföreskrifterna], under the supervision of an authorised elec-
trical installer.
Electrical connection
The boiler is connected directly to the mains (no plug) using a
rubber cable, via an all-pole circuit breaker with a contact gap
of at least 3 mm.
The electrical connections are at the rear of the boiler, in the
form of three quick connectors:
15. Mains connection, 230V~. Cable with quick connectors supplied.
16. Fan.
17. Circulation pump, for charging the accumulator system.
Supply
Fan
Circulation pump
YELLOW/GREEN
YELLOW/GREEN
BLUE
BLACK
BLACK
BLUE
15
16
17
15. Supply connection,
3-pole connector.
a. cable part, socket.
b. chassis part, plug.
16. Fan connection,
5-pole connector.
a. cable part, plug.
b. chassis part, socket.
17. Connection for accumulator system
charging pump,
3-pole connector.
a. cable part, plug.
b. chassis part, socket.
18. Terminal block for internal earth
connections.
19. Start capacitor for fan motor.
20. Main switch.
21 Thermostat for fan and charging
pump.
22. Fan start when the boiler is cold.
23. Relay.
25
15a
16a
17a
18
19
20
21 22
23
24
26
15b
17b
16b
20 22 21
25 26
27 28
24. Time relay, delayed cutoff.
25. Overheating protection.
26. Indicator showing triggered over-
heating protection.
27. Thermometer, displays the boiler
temperature.
28. Pressure gauge showing the water
pressure in the heating system.
Function
Start with the boiler cold.
Set the main switch, 20, to the ON position – the green area
must be visible.
Set the thermostat, “FAN STOP”, 21, to 120°C. The thermostat
detects the flue gas temperature.
Press “FAN START”, 22, the time relay, 24, is activated and the
fan starts.
When the time set for the time relay, 30 minutes, is reached, the
contact changes, which means that the fan and the charging
pump for the accumulator system are controlled by the thermo-
stat, 21.
When the rewood is burnt out and the ue gas temperature
falls below the value set for the thermostat, 21, the fan and
charging pump stop running.
If the boiler temperature exceeds 110°C, the overheating pro-
tection is triggered. The fan stops running and the charging
pump continues to operate.
If the overheating protection, 25, is triggered, the “ALARM” indi-
cator , 26, is lit. The relay, 23, prevents the time relay activating
when the overheating protection is triggered.
To reset the overheating protection, press “RESET”, 25, on the
boiler control panel. It is not possible to reset the system until
the boiler temperature has dropped below 95°C.

7
2008-03 Vedolux 37
Checks
After installation, check with the installer that the system is in perfect
condition.
Ask the installer to demonstrate the settings and functions so you know
how to operate and care for the system.
Checks
Before putting the system into operation, check that:
• the system is lled with water
• all connections are watertight
• flue gas connections to the boiler and to the chimney are tight
• the lling/drain valve has been closed properly.
• the safety valves are working correctly
• the necessary valves are open
• the circulation pump is working and the direction of flow is cor-
rect
• the correct temperature has been set on the charge thermostat
Firewood as a fuel
Vedolux 37 has a ceramic grate and an afterburning chamber
made of high-temperature resistant stainless steel. The boiler
works on the principle of reverse combustion. If the boiler is
correctly operated, it burns rewood and gases very effectively,
with high efciency and low environmental impact.
Using rewood as a fuel is not simply about burning the wood –
the techniques used have a decisive effect on the result.
Firewood
Hardwoods generally have a higher energy content than coni-
fers. However, the most important thing is that the wood must
be dry – moisture content 12-30 %.
If the wood is damp, much of the energy is wasted on drying it
out, combustion is impaired and the risk of tarring increases.
Because of the high acidity of oak wood, it should not be used
as a fuel for extended periods. Oak should be seasoned for
more than three years before it is burned.
The blocks of wood must be the correct size for the combustion
chamber, around 50 cm long and around 15 cm wide, allowing
three blocks to t the width of the grate.
To allow the wood to dry out, the tree should be felled at least
one season in advance. An alternative method is to fell the tree
in spring just after the leaves have come out, then wait a few
weeks before trimming and splitting the wood. During these
weeks, the leaves wilt and draw out the moisture. After another
few weeks of drying, the wood has 25-30 % moisture content.
After cutting, the wood must be split. The more it is split, the
faster and easier it will dry. If logs are difcult to split, the bark
can be stripped to speed up drying. Fresh wood is easiest to
split.
The wood should not be in direct contact with the ground, as
this causes the wood to take on moisture instead of drying out.
Ideally the wood should be kept under a roof but in a place
where the sun and wind can help dry it. The best place for -
nal drying is the boiler room, for 2-3 weeks before the wood is
used. The moisture content after drying is around 20 %.
Firewood
Heat content
The heat content is the amount of heat that can be extracted
by the boiler and transferred to the boiler water. Heat content
should not be confused with energy content, which increases
with the size of the block of wood. The heat content increases
with the dryness of the block of wood, because less heat is
wasted on drying the wood.
Newly cut wood has a moisture content of around 55 %. Fire-
wood that has been dried out following our instructions has
around 20 % moisture.
The chart illustrates how the heat content changes.
If a building uses 25 m3 of newly cut rewood (55 % moisture),
around 14 m3of water needs to be dried through the chimney.
In other words, the energy needed to vaporise 14 m3is wasted.
Other problems using damp wood include poor combustion
and dirty emissions, which in turn impair efciency.
First burning cycle
In the rst burning cycle, or if the boiler has not been used for a
while, it is important to just light a small re. The ceramic parts
of the boiler may contain moisture, which must be vaporised
slowly so as not to crack the ceramic. Once the ceramic parts
are dry, you can light a full-size re. The ceramic does not take
on moisture when the boiler is being used. See also the section
on “Operation and care”.
Moisture
content

8
2008-03
Vedolux 37
Startup
1.the bypass damper must be in the closed position.
2.place kindling in the boiler, with paper if you are using it.
3. the main switch must be set to on (the green area must be
visible).
4. thermostat, FAN STOP, set to 120°C.
5.press “FAN START”, the fan starts.
6.light the boiler – gas is recommended.
First burning cycle
The rst re to be lit should be started carefully so that any re-
maining moisture in the ceramic can vaporise slowly. Lighting a
erce re may crack the ceramic Only light a small re the rst
time. Once the ceramic parts are dry, you can light a full-size
re. The ceramic does not take on moisture when the boiler is
being used.
Lighting - start
•Place kindling in the boiler, followed by crumpled newspaper.
•Press “FAN START”, the fan starts. Light the paper. Leave the
rewood hatch slightly open.
• Wait a while before closing the rewood hatch. The wood must
have properly ignited (ue gas temperature approx. 120°C).
Leave it to burn until there is a layer of vigorous embers.
Lighting a fire with the gas lighter
•Arrange medium size blocks of wood over a layer of kindling,
then ll the rest of the combustion chamber with large blocks.
• Close the rewood hatch.
•Ignite the gas lighter and insert it into the nozzle in the hole
at the top of the inner ash hatch. Move the flame from side to
side, and the wood should have ignited after about a minute.
Adding wood
When the time comes to add more wood, open the bypass
damper before the rewood hatch. This prevents smoke enter-
ing the room and the risk of flames exiting the boiler when you
add rewood.
Even out the layer of embers. Add more rewood. The amount
of rewood added depends on the
temperature in the accumulator – do
not allow the temperature to get too
high. Filling the boiler with rewood
increases the temperature of the boiler
and a 1500 litre accumulator by about
55°C. Stack the wood carefully.
Close the rewood hatch followed by
the bypass damper.
If the flue gas temperature increases,
you know that the rewood has ignited.
When the rewood has burnt and the
flue gas temperature has fallen to be-
low 120°C, the fan and charging pump
to the accumulator stop running.
RISK OF BURNS
Never open the boiler hatches if the fan is not running and
you think there might be a fire burning in the boiler.
20 22
21
25 26
27 28
20. Main switch.
21. Thermostat for fan and charging pump.
22. Fan start when the boiler is cold.
25. Overheating protection.
26. Indicator showing triggered overheating protection.
27. Thermometer, displays the boiler temperature.
28. Pressure gauge showing the water pressure in the heating system.
8
Bypass damper
The boiler's bypass damper must only be used for adding wood
during a burning cycle, in order to prevent smoke entering the
room.
When the bypass damper is open, the boiler works like an up-
draught burner with shorter flue gas paths. This increases the
ue gas temperature and reduces efciency.
Do not forget to close the damper after adding rewood.
Controlling combustion
All air passes into the boiler through the draught hatch in the
ash hatch. Combustion is controlled by the draught created by
the fan, and by the addition of oxygen in primary, secondary
and tertiary air through the inner ash hatch.
To optimise combustion and efciency, the ue gas temperature
should be 175- 200°C.
45. Hole for gas lighter.
46. Secondary damper, normally closed.
47. Tertiary damper.
The tertiary air, 47, can be adjusted so that the ame is light yel-
low.
The soot indicates the quality of combustion. If it is very dark or
black, the combustion process is not receiving enough air. In
this case, the damper should be opened more. Efcient com-
bustion gives the soot a grey-brown colour. If you are burning
wood with a moisture content of 18%, the opening should be
about 4 mm.
Inner ash hatch
The diagram below shows how to insert the inner ash hatch.
Follow the steps in reverse to remove it.
Firewood as a fuel
45
46
47
Push up Angle in Push down. The pin at the
bottom of the ash hatch
engages with the hole in
the ash plate.

9
2008-03 Vedolux 37
3. Flue pipe, standard.
4. Fan motor.
a. long nuts, x 3.
7. Cleaning hatch.
8. Control for bypass damper.
9. Firewood hatch.
10. Ash hatch.
18. Flue pipe straight up.
19. Base frame with ash pan.
29. Tool for removing turbulators.
30. Short turbulators, x 3, in upper pipes.
31. Long turbulators, x 2, in lower pipes.
32. Plate in upper front edge of the combustion chamber.
33. Inner ash hatch with secondary damper.
34. Ceramic grate, two parts, front and rear.
35. Combustion tunnel.
43. Protective grating for fan.
44. Collection chamber.
29 30
31
32
34
35
3
7
18
9
10
8
32
30
31
34
33 35
4a
4
4a
43
16
When cleaning, do not leave any remains of wood or embers on the grate.
All boiler cleaning takes place from the front.
Disconnect the power supply to the boiler before cleaning.
Rake out the ash from the combustion tunnel before each burning cycle.
Ashes may contain embers for a long time after the burning cycle, so
keep them in a non-ammable container with a cover.
Tarring in the combustion chamber does not normally cause any prob-
lems if the correct burning procedures are followed with an accumulator
tank.
Cleaning the boiler
Rake out the ash from the combustion tunnel before each burn-
ing cycle.
It is normal for tar to form on the walls of the combustion cham-
ber. The tar does not need to be removed because it will burn
off once the layer has reached a certain thickness. The tar does
not affect the efciency of the boiler, and the output of the boiler
is calculated and dimensioned on the basis of the heat conver-
sion surface area in the flue ducts. The flue ducts must be
kept clean at all times. In a cleaned boiler, less of the
heat escapes with the flue gases. One way of telling
whether it is time for cleaning is to check the flue gas
thermostat. It is a good idea to clean the boiler if the flue gas
temperature is approx. 25SDgrC higher than the temperature in
a clean boiler.
• Open the cleaning hatch, 7.
• Pull out the ve turbulators, 30 (x 3) and 31 (x 2), using the
tool 29.
Clean the pipes with the pipe brush.
When cleaning the three upper pipes, be careful not to push
the pipe cleaner through the grating, damaging the fan. Do
not push the pipe cleaner further than the end of the pipe.
You can feel when you have reached the end from the differ-
ence in the amount of force needed to push the cleaner.
Replace the turbulators.
• Open the rewood hatch, 9, and the bypass damper, 8.
Remove the ash on the plate in the upper front edge of the
combustion chamber, 32.
There should always be a small quantity of ash on the ceramic
grate, 34, in order to extend the service life of the grate.
• Open the ash hatch, 10, and remove the inner ash hatch.
Rake out the ash from the combustion tunnel, 33, but leaving
a protective layer of a couple of centimetres.
Clean the chamber around the combustion tunnel.
Close all hatches and dampers.
Chimney sweeping
After the chimney has been swept, unscrew the wingnuts on
the front of the flue pipe, 3 and 18, and remove the cover.
Remove soot and ash. Before restarting the boiler, remove any
soot and ash that has fallen onto the fan and into the collection
chamber 44.
Cleaning the fan
If necessary the fan can be removed and cleaned, You should
handle the fan with care.
• Remove the fan connector, 16, from the boiler plug.
• Unscrew the long nuts, 4a, securing the fan.
• Clean the fan blades carefully so they keep their shape. You
are recommended to use a paintbrush.
• Replace the fan and connect the cables.
Cleaning
34
35
35
44
19

10
2008-03
Vedolux 37 Operation and maintenance
Ceramic – combustion tunnel
The ceramic grate and combustion tunnel are wearing parts
that will have to be replaced over time. Wearing parts are not
covered by any guarantee. Small cracks in the ceramic are not
abnormal and no action is necessary.
To increase the service life of these parts, follow these instruc-
tions:
• Do not remove the ceramic when cleaning the boiler combustion cham-
ber.
• Scrape the ceramic gently and carefully when removing ash from the
boiler.
• Leave a couple of centimetres of ash as a protective layer on the grate
and the combustion tunnel.
Pieces of charcoal from the previous burning cycle can be left for the
next cycle.
• Only use “real” wood, avoiding plastic, treated timber, refuse, etc.
• Place the wood in the boiler, do not throw it in.
• If the boiler/ceramic is new or if the boiler has not been used for a while,
light a small re to heat the ceramic and remove any moisture.
Safety valves
In order to preserve the safety function, the safety valves for the
domestic hot water system and the heating system must be op-
erated regularly, around four times a year.
Open and close the safety valve manually around four times a
year, checking that a small amount of water escapes and that
the valve closes again properly.
Also check that there is sufcient pressure in the system. If nec-
essary, add more water.
Venting
Regularly check that there is sufcient water in the heating sys-
tem.
Air may remain in the system for a while after installation, so
bleeding should be repeated a few times. After bleeding, check
the pressure and add water if necessary.
Water pressure in the system
The pressure required in the heating system depends on the
height difference between the lowest and highest points in the
system, the static head. If the level difference is 5 metres, the
pressure is 0.5 bar, if it is 10 metres, the pressure is 1 bar.
The pressure required in the heating system depends on the
height difference between the highest and lowest points in the
system, the static head.
Note that the pressure in the system varies with the boiler tem-
perature – do not add water unnecessarily.
The volume of water changes with the temperature, and the
change in volume affects the pressure in the system. The higher
the temperature the greater the volume and the higher the pres-
sure. The expansion vessel takes up the changes in volume.
The flow temperature – and therefore also the pressure – is
higher in the summer than the winter.
Unvented expansion system
The pressure in the unvented expansion vessel should be
checked at intervals of several years. The vessel must not be
exposed to any pressure from the heating system.
Overheating protection
The overheating protection, which stops the fan if the boiler
temperature is too high, is reset on the boiler control panel. The
boiler temperature must have fallen to below 95°C before you
can do this.
If there is a risk of freezing
In severe cold weather, no part of the heating system should be
turned off as this would involve a risk of burst pipes.
Never start a burning cycle if you suspect that any part of the
heating system might be frozen. Call the installer.
If the heating system will be turned off for an extended period,
the water should be drained.
Draining the boiler
The boiler must not be running while it is being drained.
Close the valves to the heating system.
Run the water to a floor drain via a hose connected to the boiler
drain valve, R15.
Allow air into the system by opening the boiler safety valve.
The drain valve for the heating system must be located in a con-
venient place.
Boiler cleaning
Keep the boiler clean and tidy.
Alkaline cleaning agents are useful for removing soot marks
from the boiler. Do not use strong solvents.
Pellet burner
For optimum reliability and efciency, it is essential to check and
adjust the burner regularly.
The boiler temperature should not be allowed to fall below 70°C
Oil burner
For optimum reliability and efciency, it is essential to check and
adjust the burner regularly.
The boiler temperature should not be allowed to fall below 70°C

11
2008-03 Vedolux 37
Problems burning firewood
The most common problems that occur when burning rewood are usually the result of the boiler failing to reach a high enough temperature so
that the boiler never really gets going. Another common problem is that the heat is not transferred to the accumulator tanks even though the
wood is burning well in the boiler.
Poor combustion in the boiler Damp wood. A ceramic boiler requires a high combustion temperature. To
achieve this, the wood must be dry, moisture content 12- 30%.
Incorrect handling. Read the instructions.
The wood is not suitable for the
boiler.
The rewood should be 50 cm long. The thickness should allow
three blocks to t the width of the grate.
Shaped wood, rectangular wood. If uniform blocks of wood are stacked on each other, a sold mass
of wood is created with limited surface area for the re to act on.
Arrange the wood so there are gaps between the blocks.
Fails to burn. This happens when the wood is bent and is not suitable for the
boiler. Use wood that is suitable for the boiler.
Inadequate air supply. The fresh air intake of the boiler room must have at least the same
cross sectional area as the flue duct. Check that the air valve is
open.
Secondary/tertiary damper too
open.
If the damper is too open, the primary and secondary air will be
incorrectly distributed. Start with the secondary damper fully
closed. It will never normally be necessary to open it by more than
a few millimetres (glass).
The chimney runs downwards
from the boiler connection.
The turbulence created takes away some of the draught. Fill the
lower part with sand or similar material.
No accumulator control. A ceramic boiler is at its most efcient when the ceramic is hot.
The temperature in the boiler therefore needs to be increased
quickly before charging begins. Add a control system.
Ceramic not correctly positioned. If the boiler is new, check that the ceramic has not moved during
transport. There is no need to remove the ceramic, even for clean-
ing. However, if it is removed anyway, make sure it is replaced cor-
rectly. Check the seal with the combustion chamber walls.
High flue gas temperature. Tar, soot in the pipes. Due to incorrect combustion. Check the rewood, the draught,
the air intake and the handling. Clean the boiler.
Bypass damper open. Close the damper. The bypass damper must only be opened for
adding wood.
Combustion tunnel in wrong posi-
tion.
The combustion tunnel must be inserted as illustrated on page 9.
Faulty flue gas thermometer. The thermometer may have been damaged by cleaning or by
long periods of updraught burning.
Tar and large quantities of soot
in the pipes.
Incorrect combustion. See the section about high flue gas temperature.
Wrong connections. Check.
Heat is not transferred from the
boiler to the accumulator.
Circulation pump too small. The pump must have sufcient capacity to transfer the heat.
Change to a larger pump.
Air. If you make the connections as suggested, the system will not be
sensitive to air problems. Vent.
Wrong connection of accumula-
tor.
See the points above.
Boiling noises in the boiler. Low pressure head. Check the pressure, which should be about 1 bar. The expansion
vessel must be dimensioned for the volume and for the tempera-
ture variations that occur.
Fan fails to start Main switch in position O. Set the main switches to position I.
Forgotten to connect the instant
connector.
Connect the instant connector.
Overheating protection triggered. Reset the overheating protection.
The safety valve opens when
the system heats up.
Expansion vessel too small. See the section about the “Expansion system” on page 5.
Initial pressure in the expansion
vessel too high/low.
Check the pressure in the vessel, see the section about the “Ex-
pansion system” on page 5.

12
2008-03
Vedolux 37
item prod.no. name qty.
25 12 00 17 Overheating protection 1-pole, alt. 110°C 1
21 12 00 53 Thermostat 1-pole 100-500°C 1
12 00 09 Handle thermostat 1
22 13 00 31 Switch 2-pole, auto-return 1
20 13 00 32 Switch 2-pole 1
18 16 00 01 Terminal block 3-pole 1
16 00 06 End plate 1
23 17 00 06 Relay 1-pole alt. 1
24 17 00 21 Time relay 1
26 19 00 06 LED 230 V, red, pin 1
23 00 75 Damper arm 1
23 00 76 Damper arm lock 1
31 23 22 52 Turbulator 1000 mm 2
30 23 22 53 Turbulator 436 mm 3
11 24 03 50 Drain valve. R15ext 1
5 29 50 05 Cleaning tool bracket 1
30 00 09 Glass bre cord 6mm (m) 0.6
30 00 11 Glass bre cord 10mm (m) 1.4
30 00 30 Ceramic bre paper 1x25mm (m) 2
34 3104 00 Grate front, V-37 1
34 31 04 01 Grate rear, V-37 1
9 32 00 07 Firewood hatch 1
10 32 00 18 Draught hatch, V-37 1
37 00 60 Handle knob 25 mm 2
28 38 00 01 Manometer 0-4 bar 1
27 38 00 03 Thermometer. 0-120°C 1
38 00 30 Flue gas thermometer 50-500°C 1
44 00 02 Pipe cleaner 89 mm 2
44 00 05 Pipe cleaner 595x80x60/30mm 1
44 00 11 Spring steel shaft 1500 mm 2
15b 44 01 53 Inlet 3-pole female 1
44 01 54 Panel xing 3-pole 2
17a 44 01 59 Plug 3-pole 1
16b 44 01 66 Outlet 5-pole for panel 1
16a 44 01 67 Plug-on contact 5-pole 1
17b 44 01 68 Inlet 3-pole male 1
15a 44 01 69 Plug 3-pole 1
44 02 27 PowerJet gas lighter 1
4 50 00 09 Fan V-37F 1
70 00 75 Insulation for cover of ue gas fan 1
70 00 86 Fan gasket 1
71 01 90 Base plate of ash hatch 1
35 71 01 95 Combustion tunnel 1
71 01 98 Bypass damper 1
71 02 00 Damper arm 1
71 02 57 Inner ash hatch 1
29 71 02 60 Turbulator tool 1
71 02 61 Inner damper of draught hatch 1
904 56 Ash rake 1
7 909 21 Cleaning hatch 1
The item numbers refer to the number of the component in these instructions.
Component specification