oventrop Toc-Duo-3 Bedienungsanleitung Seite 10

Observe warning advice under paragraph 2
(safety notes)
The heating oil filter with deaerator is to be installed at
a suitable location with the help of the enclosed fixing
plate. It can be installed above or below the oil level.
To mount the "Toc-Duo-3" on the burner wall, sheet
metal screws are included in the delivery.
All oil pipes must be installed and operated in a frost-
free location as oil precipitates paraffin which may
block the filter. The finer the filter insert, the more this
phenomena applies.
When converting from two pipe systems to one pipe
operation, the pipe dimension has to be reduced if re-
quired, see "Sizing of the suction pipe".
NOTICE
– Please protect the "Toc-Duo-3" against external
forces (e.g. impacts, vibrations etc.).
– The supply and return connection must not be
mixed up as this may cause damage to "Toc-
Duo-3" and the burner pump.
– Care should be taken that the max. ambient tem-
perature does not exceed 60°C, i.e. do not mount
the "Toc-Duo-3" near an un-insulated part of the
boiler or the exhaust pipe or above flaps of the
heating which can be opened.
– Note:
For technical reasons, deaerators filled with oil
must not be inclined too heavily or be laid down.
Please drain off the oil first.
After installation, check all installation points for le-
aks.
If constructional conditions allow, the pipe should be
installed in such a way that it acts as a "self-monitoring
suction pipe". It should be installed with an even de-
cline towards the tank and all check valves in front of
the "Toc-Duo-3" have to be removed. If a leakage oc-
curs, the column of liquid in the declining pipe breaks
off.
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Installation examples:
Installation of the "Toc-Duo-3" below the oil level.
Underground tank
Installation of the "Toc-Duo-3" above the oil level.
Pressure test:
When carrying out the pressure test of the suction
pipe, the pressure test device must not be connected
to the "Toc-Duo-3" as the integrated check valve will
prevent the pressure transmission on the tank side.
Moreover, the float valves of a new unfilled "Toc-Duo-
3" are opened so that it should not be included in the
pressure test.
Sizing of the suction pipe:
The suction pipe towards the tank should be sized in
such a way that the velocity of the heating oil during
burner operation is between 0.2 and 0.5 m/s (DIN
4755). This is especially valid for pipe sections leading
downwards. If the suction pipes are oversized, velocity
is reduced in such a way that the gas emissions are
not transported constantly and gather as big air bub-
bles in upper pipe sections. If a big air bubble reaches
the burner, it may cause a malfunction. For small bur-
ner units in detached and semi-detached houses, the
inner pipe dimension of 4 mm (e.g. pipe 6 x 1) is often
sufficient. Apart from the velocity, the flow resistance
and the suction height have to be taken into conside-
ration.
Burner
"Toc-Duo-3"
Burner
"Toc-Duo-3"