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3.2 Electricity supply
While carrying out electrical installations you must observe the relevant
provisions of VDE (Association of German Electro-technical Engineers),
SEV (Swiss Association of Electro-technical Engineers) or ÖVE (Austrian
Association of Electro-technical Engineers). Power supply: 230 V~ 50 Hz
10 A. A load switch in accordance with VDE, SEV, ÖVE and all-pole, must
be applied as the main switch S1 with at least 3 mm contact opening.
The connection occurs according to DIN 4791:1985-09 through a 7-pin
Euro plug. Wiring details can be gathered in Chapter 6 of the wiring dia-
gram. The burner will be delivered with the Euro plug female contact. The
Euro plug male contact is not contained in the scope of delivery.
The entry of cable for burners provided with a covering cap occurs
through the rubber funnel in the base plate, through which also both oil
hoses are inserted.
At installation of uncovered burner versions the required protection class
has to be established.
3.3 Combustion chamber – minimum dimensions
In order to ensure reliable operation and low pollutant emissions the geo-
metry of the combustion chamber must meet the test flame tube stan-
dards in accordance with DIN EN 267:2011-11.
Furnace - minimum dimensions according to
DIN EN 267:2011-11
Oil flow
Diameter respectively
height and width
1,0 - 2,0 kg/h
Ø 225 mm
2,0 - 6,0 kg/h
Ø 300 mm
3.4 Exhaust gas system
The burner is designed to operate in a dependent room air mode, as well
as in an independent room air mode. To operate the burner in a dependent
room air mode, we recommend the installation of a draft limiter into the
flue gas system in order to ensure a constant pressure in the combustion
chamber. The adjustable low pressure in the combustion chamber, which
may be set on the draft limiter in comparison with the ambient pressure,
should be –0.1 mbar. For pressure boilers you should gather the chimney
draught that needs to be adjusted from the boiler operating instructions.
For operating in room air independent mode, the burner can be connected
to the air exhaust turnout of an air exhaust system by optional air inlet
adapters (Ø 50 mm and Ø 80 mm).
We recommend an air exhaust system with a maximum length of 14 me-
tres and 3 (maximum) installed sharp bends. It is allowed to use a coaxial
tube with a diametric pairing of Ø 80/125 mm up to a firing performance
of 30 kW. A coaxial tube with a diametric pairing of Ø 100/150 mm is re-
commended for the performance range above 30 kW. The exhaust pipe
must be gas-proofed, insensitive to moisture, corrosion and acid proof.
In the event of room air independent operation you may not integrate a
draft limiter into the exhaust pipe. In addition, you should also ensure that
the boiler that is used is suitable for the selected exhaust gas system in
respect to the exhaust gas temperatures.
3.5 Oil supply system, oil pipe dimensions
The burner can be selectively operated as a pure one-line system, a one-
line system with filter-aspirator combination (the pump is operated similar
to a two-line system), or a two-line system.
The burner has been pre-set in series for a two-line system. When con-
verting the pump to a one-line operation make sure to seal the return piece
with a screw plug and remove the shift screw in the junction canal bet-
ween the pressure and the suction side.
In order to avoid any malfunction of the burner caused by the oil supply
system we, as the manufacturer, would recommend operating the burner
in a pure one-line system with filter-aspirator combination. In this case
you should consider the following points:
• The maximum suction height without a booster pump should not ex-
ceed 3.5 metres.
• Up to a nominal thermal output of the boiler of 50 kW we would recom-
mend an oil pipe with an internal diameter of 4 mm for the one-line sys-
tem with filter-aspirator combination.
• The pipes should be arranged in such a manner that the boiler door, to-
gether with the burner, can be traversed by 90°.
• In front of the flexible oil pipes you must install a valve at the end of the
rigid oil pipes (already integrated in commercial filter-aspirator combi-
nations).
• A filter-aspirator combination must be installed before the burner. An
insert of 20-75 μm sintered plastic should be used for boiler capacities
of up to 40 kW, while for boiler capacities of more than 40 kW it should
be a sieve with a fineness of 100-150 μm.
• The highest point of the oil pipe should not exceed 3.5 metres above
• The pipes must be installed in such a manner that no liquid may be al-
• If the highest level of the oil in the tank is above the oil pump of the bur-
• The oil pipe and the connection to the burner must meet the current
Boiler's nominal thermal output
in kW
Internal pipe Ø in mm
H* in metres
* H = Maximum suction height in metres (low sulphur heating oil EL, oil
Depth from the baffle
For other plant requirements (such as suction height, pipe lengths and
plate
boiler nominal thermal outputs) you should consider the attached dia-
grams of conduit dimensioning.
250 - 350 mm
350 - 612 mm
Oil supply system
One-line system.
One-line system with a filter de-aerator combination.
Adjustment at the oil pump for a one- and two-line system.
the suction pipe of the oil tank.
lowed to escape from the container.
ner you must install a solenoid valve at the highest point of the oil pipe,
and as close as possible to the oil tank.
provisions. It is absolutely imperative that you check the existing oil
supply, as from the time of oil tapping from the oil tank.
0
1
2
temperature >10 C, up to 700 metres MSL, 1 filter, 1 check valve,
6 bends 90°).
Valve system
Absperreinrichtung
Filter
Filter
Absperreinrichtung
Valve system
Einstrang-
One line
installation
system
16
20
25
35
50
4
4
4
4
4
maximum permissible pipe
length in metres:
30
30
30
30
20
30
30
30
23
15
30
28
23
16
10
Valve
Absperr-
system
einrichtung
Filter
Filter
Two-line system.
Filter-Entlüfter -
Combination of
Kombination
filter/aspirator
Zweistrang-
Two line
installation
system
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