Fire Prevention During Installation And Use Of Heating Appliances - Atmos C15E Instruction Manual

upwards in the direction towards the chimney. Flue-gas ducts
must be mechanically durable and sealed against combustion
products and gas penetration, and it must be possible to clean
them inside. The flue-gas ducts must not be lead through an-
other person's apartment or property. The internal diameter of
the flue-gas duct must not be larger than the internal diameter
of the chimney intake and it must not decrease in width in
the direction towards the chimney. Use of elbow-pipes is not
suitable. Methods for providing flue-gas duct entries through
flammable material structures are stipulated in appendices 2
and 3 of the Czech standard ČSN 061008/97. These are ap-
propriate for mobile installations, wooden cottages etc.
1 Waste gas thermometer
2 Cleaning aperture
3 Throttle valve (draught limiter)
In case of excessive chimney draught, install a throttle valve (3) or draught limiter.
11. Fire prevention during installation and use of heating ap-
pliances
Selected from ČSN 061008/97 – Fire safety of local appliances and heat sources.
Safe distances
When installing the appliance, keep a minimum safe distance of 200 mm from building materials.
This distance is valid for boilers and flue-gas ducts positioned near flammable materials of the B, C1
and C2 flammability class materials (the flammability classes are listed in chart 1). It is necessary to
double the 200 mm safe distance if the boilers and flue-gas ducts are placed near flammable materials
of C3 class (see chart 1). It is also necessary to double the safe distance if the flammability class of
the material in question cannot be determined. The safe distance can be decreased to one half (to 100
mm) if a heat insulating, non-combustible screen (asbestos board) of a 5 mm minimum thickness, is
placed 25 mm from the protected combustible material (so called flammable insulation). The screen-
ing board or protection screen (on the protected object) must exceed the boiler outline including its
flue-gas duct on each side by at least 150 mm and by at least 300 mm above its upper surface. The
screening board or protection screen must be also used for all fixtures and fittings from combusti-
ble materials in cases where the safe distance cannot be maintained (such as in mobile structures or
wooden cottages etc. - for more details see ČSN 061008 standard). The safe distance must be main-
tained even when placing fixtures and fittings near the boilers.
If boilers are placed on floors from combustible materials, the floor must be fitted with a non-com-
bustible, heat insulating pad exceeding the boiler's ground-outline on the side where the stoking and
ash-pan apertures are, by at least 300 mm (in front of the aperture) and on all the other sides by at
least 100 mm. The non-combustible, heat insulating pad can be made from any material of A flam-
mability class.
Instruction manual - GB
www.atmos.cz
GB-15