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 floor. 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 find 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 filled.
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 fixed 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 165cm
2
Min:
Ø 100 mm 79cm
2
Draught:
min 10 Pa
F
i
l
l
e
r
Flue gas thermometer
The supplied flue gas thermometer is fitted 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
flue gas thermostat. When the flue 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 stratification 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 specified 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 fitted 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
