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
. Recommended log diameter is 150 mm.
Logs with larger diameters can be used as well (max. 200 mm). If so done, the boiler’s rated output capacity will decrease and
the period of burning will be extended Minimal diameter of wood chops is 60mm. In case these parameters are not met, extreme
overheating of boiler may occur in the burn-out chamber and ceramic parts will be damaged consequently due to enormous
heat.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.
8.
Accessories
Scraper for sweeping pipes
1 pc
Inlet valve
1 pc
Sweeping scraper
1 pc
Operation and maintenance manual
1 pc
Warranty certificate
1 pc
Female socket for pump
1 pc
9.
Electrical Connection of the Boiler to the Power Supply
The boiler is connected to the electric power supply by a three-conductor cable (triplex) with a male plug. The male
electric plug is inserted into a fixed female plug with a voltage of 230 V / 50 Hz, 16 A. The female plug must be installed
according to current Slovak Technical Standards. The power supply plugs must be easily accessible to personnel after the
installation of a boiler.
10.
Possible Malfunctions and the Method of Correcting Malfunctions
Malfunction
Cause
Method of Remedy
The warning lamp (“Power”)
- no voltage at power supply terminal
- check
does not light
- the plug is not properly inserted in the power
socket (female terminal)
- check
- bad/blown fuse
- replace
- bad mains switch
- replace
- bad electric power cable
- replace
Your boiler is failing to give
- too little water in the heating system
- add water
the required output capacity
- the heating system has not been deaerated
- deaerate
- your boiler is not of appropriate size/capacity for your
- revise the project
hot water/heating system
- fuel of low quality, high moisture content,
- burn dry wood
too large logs
and wood waste
