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HEATING BOILER: Astra G-50
• it is recommended to dry the split firewood outdoors under the above-mentioned conditions. Depending on the type of wood,
soft wood (alder, asp, fir, poplar) must be dried for at least 8 months, and hard wood (oak, ash, birch) for at least 20 months.
firing the boiler with coal, rubber or plastics is prohibited. However, loading wood briquettes into the
boiler together with their plastic packaging bags is allowed.
7. oPeRaTIon
• fRonT conTRol Panel
The front control panel contains the operation thermostat 1 (Fig. 10), the thermometer 2, the green button 3 of the main
supply and the red button 4 for switching on the ventilator. The buttons light up in the ON position.
The function of the operation thermostat 1 is to switch off the boiler ventilator when the targeted water temperature
is reached. Then, the combustion in the boiler slows down and the water temperature in the boiler does not rise further.
The position of the operation thermostat 1 knob should be set so that its targeted temperature would be several degrees
less than targeted temperature of the draught regulator (see the chapter “Mounting of the draught regulator”). Then the
operation thermostat 1 will switch off the ventilator a little bit earlier than the draught regulator would descend the damper
4 (Fig. 8) into its lowest position. The appropriate position of the operation thermostat knob should be found and marked
with a pencil, or a scratch should be made on the case of the knob. This position should be defined in the next way: first, turn
the thermostat knob to maximum. Then, set the draught regulator 2 (Fig. 8) to the targeted temperature, for example to 75°
C. Start the boiler and allow it to reach a 75° C temperature. Then, turn the thermostat knob in the direction of the lower
temperature until you hear a “click”sound. Turn the knob a little bit further and mark this position on the knob case with a
pencil. Now you have found the appropriate setting position of the operation thermostat 1 (Fig. 10).
The green ventilator button 4 (Fig. 10) has three positions. The position 0-60° C is used to turn on the ventilator during the
ignition of the boiler. At this state, the ventilator will be operating permanently. The central position , “OFF,“ is intended to
switch off the ventilator, the button lamp then does not light. After the initial phase of kindling the boiler, when the water
temperature in the boiler overlaps 60° C, the ventilator is usually turned to the position 60-90° C. This setting switches off the
ventilator automatically after the combustion in the boiler has ended and the water temperature has dropped below 60° C.
If you forget to switch the ventilator to the 60-90° C position, nothing serious will happen, just the ventilator will be rotating
permanently even after the combustion in the boiler will come to the end.
The ventilator will be switched off equally in both the 0-60° c and the 60-90° c positions when the safety
temperature limiter 95° c thermostat 2 (fig. 11) trips, the operation thermostat 1 (fig. 10) switches it off.
fig. 10 front control panel
1. Operation thermostat knob; 2. Thermometer; 3. Green button for switching the voltage of the boiler on and off; 4. Red button for switching on the ventilator.
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1
3
4