Instruction manual - GB
www.atmos.cz
GB-5
GB
1. Intended use
The hot water boilers ATMOS D15P, D20P, D30P, D40P and D50P are designed for convenient
heating in residential houses, weekend house and other similar buildings by wood pellets or fire wood
(as an alternative fuel in case of urgent need). Pellets of 6 – 8 mm diameter and any dry firewood of
300 to 700 mm length (depending on the boiler type) may be used for heating. The boiler is not in-
tended for burning sawdust or small-particle wood waste.
2. Technical description
A pellet burner with a conveyor is fitted to the left or right side of the boiler. It is attached to a
frame with sealing cord (18 x 32) by a screw. The boiler drum is manufactured as a welded structure
of 3 - 6 mm thick steel sheets. The boiler consists of a fuel-feeding hopper (combustion chamber)
which is in the lower and rear section fitted with a heatproof shaped piece and in the upper part with
a ceramic spherical chamber (shaped piece). The boiler types D15P, D20P, D30P, D40P and D50P
have a heatproof shaped piece fitted opposite the pellet burner. The shaped piece protects the boiler
drum against damage and also serves as a place on which the flame burns out completely. In the lower
part of the boiler, there is a movable grill (for facilitating the ash removal) under which an ash-pan is
located. A loading (cleaning) door is located in the front wall of the boiler. The boilers drum is ex-
ternally heat insulated by mineral wool placed beneath the sheet metal covers of the boilers’ external
housing. A panel with a main switch, operating (boiler) thermostat, pump thermostat, safety thermo-
stat, thermometer and fuse is located in the upper area of the boiler. The air inlet is equipped with a
air flap valve operated by the Honeywell FR124 draught regulator. The boiler standard model is fitted
with a cooling loop protecting it against overheating. The models D20P, D30P, D40P and D50P have
also a suction ventilator fitted to the rear side.The ventilator facilitates reaching the maximum output.
It is switched on and off by a switch located in the boiler control panel and it is controlled by the same
operating thermostat as the pellet burner.
With the D20P boiler type, use the extraction ventilator with the burner preset to an
output ranging from 16 – 22 kW only. With types D30P, D40P and D50P, the extraction
ventilator must be always operating when burning pellets.
