Rational iCombi Pro Original Installation Instructions page 87

To avoid a fire hazard due to accumulation of dirt and grease in the grease
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filter, a distance of 400 mm [16 inchs] must be maintained between the flue
gas pipes of the unit and the grease filters of the extractor hood/ventilation
ceiling.
It is not mandatory, but is recommended by the manufacturer, that the gas
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supply to the burners is only released when the hood /extraction system is
in operation.
Updraft lines are not required.
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For the installation of gas units with a type A flue gas connection with a total
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rated load of less than or equal to 14 kW, it is sufficient if the installation
site meets one of the following criteria:
– The installation area has a volume of more than 2 m
– The installation area has a door to the outside or a window that can be
– A kitchen ventilation system is operated which has a minimum delivery
Requirements for unit sizes 6 full size GN to 20 full size GN
The flue gas connection type B23 for these unit sizes corresponds to a room
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air-dependent gas fireplace with a fan upstream of the burners without flow
protection and with a total nominal load in the installation area greater than
14 kW.
80.06.083_iCombiPro-iCombiClassic_IM_en-US
kW].
opened.
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volume of 15 m /h [529.72 ft³/h] per kW total rated load and corre-
sponding supply air openings are provided.
11 | Flue gas connection for gas units
3
/kW [70.63 ft³/
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