Boiler Connection; Operation With Accumulation Tanks - ATTACK DPX15 Instructions For Use Manual

4.23 BOILER CONNECTION

The boiler must be permanently operated by nominal output. If the boiler works at the output that is
lower than the nominal output, then for the case of the heat outtake it is necessary to connect it to
the accumulation tank with the volume of at least 460 l STN EN 303-5, article 4.2.5)
Connection with the accumulation tanks
Connection system is based on principle of heating up of water in accumulation tanks, where
the warmth is gradually taken away from the tanks according to the request from the heating
system. By the operation with several heating ups at full performance, accumulation tanks will
be heated for the temperature of 90–100 °C. Heating with accumulation tanks in connection
with the ATTACK DPX boiler brings more advantages. To the main advantages belongs longer
boiler life-time and also lower consumption of fuel.
Recommended volumes of accumulation tanks according to boiler output are following:
DPX15: 800–1 000 l
DPX25: 1 500–2 000 l
DPX35: 2 000–2 500 l
DPX45: 2 500–3 000 l

4.24 OPERATION WITH ACCUMULATION TANKS

When the boiler is heated up and working at the full output, it warms the water in the
accumulation tank to the average temperature of 80 °C, after 1–3 loadings. After the fuel burns
out, the heat is taken from the accumulation tank from the three-way valve. The time of outtake
depends on the size of the tank and on the external temperature. During the heating season it
can take 1–3 days (if the min. prescribed volume is kept). If it is not possible to use the
accumulation tank of the prescribed volume, then we recommend to use at least one tank with
the volume of 500 l to let the boiler run and to after run. The minimum volume of the
accumulation tanks is given in the table of technical parameters.
The accumulation tanks available:
Type of the tank
AK500
AK800
AK1000
AS500
AS800
AS1000
Insulation of the tanks
The accumulation tanks ATTACK AK500, AK800, AK1000, AS500, AS800 and AS1000 are delivered
with the detachable insulation from soft polyurethane with the white leatherette surface.
Advantages
The installation of the boiler with accumulation tank brings several advantages:
 lower fuel consumption (even for 30 %). The boiler runs at full output until the fuel burns out
by keeping the optimum efficiency.
 longer service life of the chimney and the boiler, minimum creation of acids and condensate
 option of combination with other types of heating (solar collectors, etc.)
 combination of the boiler with floor heating
 comfortable and ecological heating
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Volume (l) Diameter (mm)
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Heat exchanger
Height (mm)
2
area (m )