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The dimensions specified on above drawings are the minimum clearances necessary for uninterrupted
and comfortable operating and servicing of the boiler.
Requirements for boiler location
The boiler should be located in a place which meets the following fire-fighting requirements:
— The boiler should be placed on a non-combustible surface.
— The boiler foundation must be made of non-combustible and heat-insulating material and must extend
beyond the boiler external dimensions at least 20 mm.
— If the boiler is to be located in a basement, it is required to locate it on a pedestal with the height not less than
50 mm above floor level. Both the boiler and fuel tank should stand vertically and be precisely levelled.
Safe distance to inflammable materials
— During boiler installation and operation the minimum distance of 200 mm to medium-flammable
materials should be maintained.
— In the case of very flammable materials like paper, wood, plastics and so on (flammability class
C3), this safe distance must be increased to 400 mm.
— If the inflammability of materials is very high, the safe distances specified above must be doubled.
Flammability classes of materials
The boiler location should ensure easy access for maintenance and service operations:
• On the charging hopper side the clearance distance of at least 1000 mm must be maintained (whenever
possible, it is the best to have such clearance equal to the length of charging hopper together with feeding
duct).
• The clearance between back side of the boiler and boiler room wall should not be less than 400 mm.
• It is essential to ensure easy access to connection points for hydraulic system, chimney and electric power
supply (3 x 400 V / 50 Hz).
Figure: Boiler location scheme
Minimum boiler
depth + 300mm
Flammability class
Material
Sandstone, concrete, brick, plasterwork made of inflammable material, ceramic tiles, granite
Cement-wood substrate, glass fibres
Beech wood, oak wood, plywood
Pine wood, larch wood, spruce wood, cork, rubber substrate
Asphalt, celluloid, polyurethane, polystyrene, plastics, PVC
A – non-flammable
B – partially flammable
C1 – hardly flammable
C2 – moderately flammable
C3 – highly flammable
