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H) Safety instructions for installing and using the boiler
Prior to installation please contact the heating professional, who will adapt the installation to your conditions and
perform the installation professionally. The basic installation conditions are provided underneath for your
information.
The boiler shall be installed in compliance with the Czech standard CSN 06 1008 (Fire protection during
installation and use of heat appliances). The boiler shall be connected to a chimney conforming with the Czech
standard CSN 73 4201.
Connection of the warm water boiler may only be carried out based on the approval of the chimney
service organization.
Recommended chimney sections for central heating boilers
Boiler output
kW
12
18
24
30
35
49,5
The boiler shall be connected to a separate chimney shaft which will provide a sufficient draft for practically all
operating conditions possible.
The pipe exhaust fixed in the smoke uptake and slid on the smoke neck of the appliance shall be assembled
and installed securely to avoid its accidental or spontaneous release.
Individual pipes of the smoke flue shall be slid into each other with at last 80 mm overlap. We recommend that
the distance from the boiler to the chimney be less or equal to 1 m. The smoke flue should ascend towards the
chimney (approx. 1:20).
The hot water system shall be installed in compliance with the Czech standard CSN 06 0830 – Safety equipment
for the central heating and non-drinking water heating systems.
The boiler and the smoke flue shall be installed in compliance with the Czech standard CSN 06 1008 in a safe
distance of 200 mm from class B, C1 and C2 flammable substances.
The flammability level of building materials and products with respect to the fire safety is specified in the Czech
standard CSN 73 0823.
The safe distance of 200 mm mentioned above shall be doubled if the appliances and smoke flues are installed
in the vicinity of class C3 flammable substances. The safe distance shall be doubles even in case that the
flammability level of the substance is not proven.
The safe distance can be reduced to a half if class A incombustible thermal insulating board is used, the
thickness of which shall be at least 5 mm and the minimum distance from the combustible substance protected
(air space insulation) shall be 250 mm.
Classification of materials into flammability groups (to CSN 73 0823)
A)
Incombustible
B)
Slight flammability
C
) Low flammability
1
C
) Medium flammability
2
C
) High flammability
3
Hot Water Boiler Manual – Models H 635, H 650
Chimney height: 8 m
15 x 15
15 x 20
Chimney section [cm]
Chimney height: 12 m
Ø 180 mm
Ø 180 mm
7
Chimney height: 15 m
Ø 200 mm
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