20
Fig.
№
. 13 Stocking Door Rosette for Primary Air Supply
The rosette in the boiler back part stays closed. If smoke comes out the chimney, the rosette may be opened a little
bit. By that more tertiary air is admitted into the boiler.
The suffocating throttle of ash pan door controls inlet of secondary combustion air under the boiler grate. It is
controlled by a damper or manually by the adjusting screw of the suffocating throttle.
The removable cover on the small ash pan serves for inlet of tertiary air (see Fig. no. 3 - Pos. 20).
Tab.
№
. 7 Adjustment of Removable Cover Position towards Small Ash Pan for Inlet of Tertiary Air
(Position)
4
5
6
7
Black coal
2
3
5
O
Brown coal
2
3
5
O
The position is informative only. In a case of smoke coming out the chimney (the same as in the case of stocking
door rosette), it is possible to open the removable cover more to prevent from respective smoking.
U
Closed
O
Opened
Fig.
№
. 14 Position of Removable Cover towards Small Ash pan for Inlet of Tertiary Air
The combination appliance – thermo-manometer – is used for the heating water temperature and the water stress
in the heating system detection. The pit of the thermo-manometer sensor is located in the upper part of the front
boiler cell.
