1. Intended use
The environmentally friendly boilers ATMOS DC 15/18/20/22/25/30/32/40/50/70/75 are designed
for heating family houses, cottages, holiday houses and other similar buildings. Boilers are suitable
for buildings with heat loss ranging between 15 - 75 kW, depending on type. The boilers are construct-
ed mainly for burning logs. Any type of dry wood is suitable for heating, especially wooden logs up
to a maximum length 330, 530, 730 and 1000 mm as per the boiler type. If you use logs of a larger
diameter the nominal output is then decreased and the burning period prolonged. The boiler is not
intended for burning saw dust or small-particle wood waste. These can be burnt in small quantities
only, together with log-firewood. MAX.10 %. Due to their huge feeding hoppers, the boilers save the
user a lot of laborious wood wood preparation and splitting operations. They save both - the physical
effort and also the time dedicated to these operations.
2. Technical specifications
The boilers are designed for burning wood based on generator gasification principle utilising an
extraction ventilator (DC15E excluded), which extracts the waste gas from the boiler or blows the air
in the boiler.
a) Gas extraction ventilator – for boilers DC18S, DC22S, DC25S, DC30SE, DC32S,
DC50S, DC40SE, DC50SE, DC75SE, DC20GS,
DC25GS, DC32GS, DC40GS, DC22SX, DC30SX,
DC40SX
b) Pressure ventilator – for DC70S (DC80)
c) Without ventilator – DC15E
The boiler drum is manufactured as a welded structure from 3 - 8 mm thick steel sheets. The top
comprises the Fuel Hopper and the lower end of this hopper comprises a heatproof shaped piece with
longitudinal opening for combustion remnants and gases. The burn-off chamber is equipped with
ceramic shaped pieces. There is a vertical waste gas duct at the rear of the boiler body which is in its
upper section equipped with an ignition valve. The upper part of the waste gas duct is equipped with
gas outlet pipe for connecting to chimney. The front wall is in the upper part equipped with stoking
door and with ashtray door in the lower part. In the front section of the upper hood there is an ignition
valve pull rod. The boilers’ drum is externally heat insulated with mineral wool placed beneath the
sheet metal covers of the boilers’ external housing. A control panel for electromechanical regulation
is situated in the upper part of the boiler. In the rear section of the boilers, there is a primary and sec-
ondary air feeding duct fitted with a control valve, which is operated by FR 124 draught regulator.
Primary and secondary air is preheated to high temperature. For boilers DC50SE, the valve with the
FR 124 draught regulator is replaced with servo drive with inbuilt spring. This boiler also contains
two special steel plates alongside the gasifying nozzle.
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