Setting Of The Bi-Thermal Draught Regulator - Stropuva DOMESTIC SOLID FUEL BOILER Operating Manual

Open a window or a special opening outside the boiler wall during boiler burning so that the boiler
would intake the air from outside. When burning coal, do not kindle the boiler. When burning firewood
logs during combustion the boiler can be loaded with firewood logs and bulky tree waste: before that lift
up the air distributor and open the door. After additional loading, combustion quality and economy get
worse for a short time therefore we recommend to do it so that to extend the combustion duration until the
next suitable loading and burning. Using wet firewood logs or any other timber fuel or its waste, it is
recommended to use the air injection collector (fig. 5.4. C) and to improve combustion by putting layers
of other timber fuel with dry firewood logs. When burning coal or peat turf, the injection collector is
required. Always the load of any other fuel is fired up though the upper doors (8).
ATTENTION!
1. The air injection collector is switched on only when the doors are closed when the fire is
made. The sensor of the chimney flue (with a thin capillary 200-300ºC) must be fitted into a
flue and water sensor (70ºC) - between the body and sealing material.
2. During boiler operation it is dangerous to open the doors widely – flame can burn the
face. Therefore at the beginning do not look inside the boiler and keep yourself away, open
the firebox doors only for 2-3 cm and only after 20-30 sec. open the doors and load firewood
logs but no more than two layers (20-30cm), close the door and pull down the air distributor.
3. It is not allowed to pass the air through the lower ash cleaning doors.
5.2.

SETTING OF THE BI-THERMAL DRAUGHT REGULATOR

The operation method of this regulator is based that when the body of the boiler becomes warmed -
it expands, the body itself slightly close or close a control valve (1) through a lever (4) and when getting
cooler - shrinks and opens.
When the boiler is brought into a boiler room and is connected to the pipeline of the heating system,
check whether draught regulating parts are not deformed: support bar (3) mount on the boiler, the
emboss of its metal part (5) must be in the valve lever (4) pore and the temperature setting screw (2) spike
- in the sag of a lever (4). The sag and pore are near each other at the distance of 3.5 mm. Check whether a
valve completely closes air ducts, its screw is loose and do not screw it. With a support screw set a valve
at 3-5 cm distance from the air injection opening, only then fire up the boiler.
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