Maga MA 15 Operation And Maintenance Manual - page 5
Output Capacity Regulation
The regulation of output capacity is performed automatically through turning on and off the fan or by adjusting the fan speed in
the control unit.
Refueling
Refueling should be carried out in the following manner: -
by pressing the Option button the
“ Fan 100 % ”
symbol appears.
This function will start up when putting the wood into the boiler and the fan will be running at 100 % rotation speed during the T-
time, which is set up in the service parameters 60 seconds (arrange 20 – 250 seconds.) After the lapse of the predetermined time
the process will be finished by switching to the automatic mode. Open the firing valve (15). Wait about 5 seconds and then open
the refueling door (2) slowly so that the accumulated gas could be exhausted into to chimney. Then you can open the door to the
full open position. Fill the charging hopper to full capacity at all times during operation of the boiler. After the hopper is filled to
its full capacity, close the door, shut the firing valve.
Boiler Cleaning
The cleaning of a boiler should be carried out as follows: Open the feeding door (2) and then sweep the ash through the slot
(10) into the lower space. Small pieces of unburnt wood (i.e. wood coal) can be left in the charging hopper until the boiler is fired
up next time. Open the clean-out opening (13) and clean the tube plate by taking out of the turbulators (25) and cleaning by the
tube cleaner. After you open the ashtray door you can rake the ash and soot out from the ashtray.
A cleaning interval depends on the quality of fuel you use (moisture content), the intensity of heating, the chimney draught,
and other specific circumstances. The boiler should be cleaned at least once a month. The lower combustion space is necessary to
be kept clean. You should clean it twice a week, at the least.
Minimum once a year, we recommend to clean the wheel of the exhaust fan(4) and the air ways. We should turn off the
control unit and unplug the boiler from the electricity. We can demount the exhaust fan by unscrewing 4 screws under the
chimney tube (14) and take out the exhaust fan with the sheet metal plate it is mounted on. Be careful and do not break the
electrical cable it is connected to the boiler. We can clean the wheel by a soft or medium brush. The we mount the fan the same
way we have demounted it. Electrical cables should hang from the bottom of the fan. To clean the air ways, we must demount the
front panel (26), unscrew two screws under the upper door (2) and 2 screws on the panel’s sides. Unscrew the air flap valve (7)
and clean the air ways. Use a plug for the holes for air ways into the nozzle, to keep it clean from the ash from the cleaning. After
cleaning, unblock the air way into the nozzle and mount the parts in the same order from the end to the beginning.
5. Heating System and Boiler Maintenance
You should check the water level in the heating system at least once in every 14 days. Refill water if necessary. Refilling
must be, at all times carried out with the boiler out of operation. If, during winter season, your boiler is out of operation, there is a
danger that the water remaining in the system may freeze causing damage to the system. In this case we can use an anti-freeze
mixture for the heating systems. Water should be pumped out of the system in exceptional cases only. If possible, drain the water
from the system for a minimum necessary amount of time. After the end of a heating season a boiler should be thoroughly
cleaned, any damaged parts should be repaired or replaced with new parts.
6. Fuel
The appropriate type of fuel is dry wood with max. 20percent moisture content. Logs should be with maximum length of
500 mm (MA 15 – 350 mm, MA 80 – 650 mm) and calorific value of 15 – 17 MJ.kg
-1
. The required dimensions of wood pieces
are stated in Chapter 2 - Technical Information.
7. Chimney
The chimney flue must at all times develop a sufficient draught to be able to reliably exhaust combustion products to the
outside environment. A separate independent chimney flue of proper dimensions should be installed for the chimney to function
properly. The proper function of a boiler depends on the chimney draught. The chimney draught depends on the chimney’s cross
section, height and the roughness of the chimney’s walls’ internal surface. The MA 25 boiler requires an operating chimney
draught of 10-15 Pa.
No other appliance should be connected to the boiler’s chimney.
For the boilers MA, approximate dimensions of the boiler’s cross section are:
20 x 20 cm
Minimum height 7 m
ø 20 cm
Minimum height 8m
Exact dimensions of a chimney for this purpose in Slovakia are governed by Slovak Technical Standards STN 734201 and
STN 734210. The manner in which the chimney must be connected is determined by the provisions of SR Ministry of Interior's
Decree No. 84/1997 Coll, Articles 4 and 15. For correct information, please see your national legislation and law.
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