Opop H 430 - Page 20

Heat and Comfort
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A) non-flammable
B) hardly flammable
C
1
) flammable with difficulty
C
2
) medium flammable
C
3
) easily flammable
A) non-flammable: stone, granite, sand stone, concrete mixes, porous
concrete, foam concrete, bricks, fireclay, mortars,
plastering, metals, glass and other mineral melts, asbestos-
cement plates
B) hardly flammable: Acumine, Izomine, plasterboard plates, Heraclites,
Lignos, Rayolite, Velox, novodur, Durufol B, Duroplast
H, Dekorplast, Rotizol, basalt felt, Haver, glass-fibre mat
C
1
) flammable with difficulty: hard timber, beech, oak, plywood, Hobrex,
Sirkolite, Werzalite, Ecrona, Umakart
C
2
) medium flammable: white-sawn timber, pine, larch, spruce, chipboard plates,
Piloplat, Duplex, Solodur, cork plates SP, cork parquet
C
3
) easily flammable: laminated chipboard plates, sawdust boards, Pilolamite,
fibreboard, hardboard, Sololak, Sololite, BA cork boards,
Polystyrene, Polyurethane
The boiler must be operated to ČSN 33 20 00 - 3:1995 in the basic AA5/AB5
environment provided that the appliance is put out of operation in a timely fashion to
prevent the risk of fire when conditions potentially leading to temporary emergence of
flammable gases or vapours occur and while pursuing work that might involve
temporary fire or explosion hazards (such as when gluing lino, PVC, etc.).
If the flooring is made of flammable material, the boiler must be positioned on a non-
flammable heat insulating mat exceeding the boiler by at least 30 cm on the side of the
stoking and ash pan door and by at least 10 cm on the other sides.
10.5 INSTRUCTIONS APPLYING TO ASSEMBLY AND USE OF
PRESSURE EXPANSION VESSELS FOR STEEL BOILERS
1) The supply line leading up to the pressure expansion vessel must be as short as
possible, free of closures and with space provided for any dilatation. The