Astra H-25 ES Handbuch für Installation und Betrieb - Seite 6

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Boiler type

The maximal length of the

firewood in mm

The recommended thickness of the firewood is 100-150 mm. Larger firewood should be split at

least once.

WARNING! Don't fire newly prepared and too damp firewood!

Recommendations for firewood preparation:

Put split firewood into well ventilated and, if possible, well sun lightened place. Firewood should

be well protected from rain and snow;

stow the split firewood with sufficient gaps in between in order for a freely circulating air to

withdraw the moisture evaporated from the firewood;

there should be a sufficient space atop of the firewood up to the roof and such ventilation that

wet air could drift away;

it is not recommended to store freshly cut (undried) firewood in the cellar, as its drying requires

sun and free air circulation. Dry firewood could be stored in the cellar where sufficient

ventilation is guaranteed;

It is recommended to dry split firewood under above described conditions in dependence with

the type of the wood: soft wood (alder, asp, fir, willow etc.) – no shorter than 8 months, hard

wood (oak, ash, birch, etc.) – no shorter than 20 months.

Preparation for heating

Before kindling the boiler, check the edge (5) position at the lower combustion chamber (see fig. 2):

the edges should be pressed to the rear wall of the boiler. Two segments must be placed in the front of the

edges.

In the frontal part of the boiler below the cover of the ventilator in the air inlet there is a damper to

regulate the air inlet to the upper burning chamber and heater. This damper is present by the producer.

Operation of the damper:

Fill the heating system with water. The filling pressure has to exceed the hydrostatic pressure by 0,

2 bars but no exceeding the working pressure of the boiler. When the system is filled up with water, check

tightness of the whole system before kindling the boiler and afterwards when the operation reaches its standard

mode.

Using air drain valve check if the air is sufficiently drained from the heating system.

Kindling order of the boiler

Before kindling the boiler, check whether all requirements indicated in the section 1 are executed.

Open the damper of the upper flue (C) by pushing the handle (12) towards yourself (see fig. 2). Open the

door (9) of the upper combustion chamber (2) and put dry kindling wood on the heat-resistant shell (3) to

form 2-3 cm gap between the opening of the shell and kindling wood. Put some of the easy flammable

materials and bigger kindling wood and firewood atop. These easy flammable materials (paper) should be

inserted in such a way, that it would come through the rectangular hole to the lower chamber of combustion

in order to permit to fire the boiler through the lower chamber. Fire the kindling wood, wait till the firewood

combusts, close the door and turn the handle (12) of the flue damper from yourself to the end. Load the

wood without any bigger spaces until the top of combustion chamber. Bigger pieces of firewood should be

loaded in the middle and smaller prices – at the sides, because the walls of the combustion chamber due to

their lower temperature slows down the combustion of the bigger pieces of wood. Do not cover with the

wood the hole of the smoke extraction valve C. With the boiler control panel switch the tension of the

electronic controller with the button „0"-„I" ( see the technical description of the electronic controller).

There will be switched on the lights and temperature indicator. Using the buttons of the temperature

regulation set required temperature of the water flowing of the boiler – it is recommended to set on the

C. Close the upper door of the combustion chamber, open the lower door, burn the wood pieces ., Leave

the lower door open until the water temperature in the boiler reaches 40

valve of the upper smoke traction by pushing the handle of valve (12) to the end. Switch-on the ventilator

with the control panel.

temperature of the water from the boiler.

WARNING! The door of the boiler combustion chambers should be tightly closed, there should be

no flammable products accessing the exterior. Door tightness is regulated by screwing or unscrewing hinge and

lock screws of the door.

Regulation of the boiler temperature – see the technical description of the electronic

regulator.

Emergency thermostat of the water temperature (safety switch ! 95

ASTRA H-25 ES

330

Afterwards the boiler will work on the automatic range and will maintain the set

ASTRA H-31,5 ES

450

6. EXPLOITATION

ASTRA H-45 ES

550

C. Close the lower door, close the

C ).

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