Hoval 41-UltraGas 1000D, Technical Information Installation Instructions

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4.3 Chimney dimensions (overpressure)
Principles
• Height above sea level max. 1000 m
The first two metres of the flue pipe must ha ve the same
dimension as the flue gas out let.
• Combustion air:
- In the case of room air-independent operation (ac-
cessories optional) the air pipe must be at least the
same dimension as the flue gas pipe.
- If the flue gas line diameter is greater than that of the
combustion air line, an individual calculation must be
made.
• Flue gas overpressure set:
- Compellingly necessary, included in the scope of de-
livery!
Boiler Flue gas line (smooth walled) Number of bow 90° (flue gas + air supply)
Type Flue gas dim. Dimension Total pipe length in m (flue gas + air supply)
UltraGas
®
internal DN 1 2 3 4 5 *
(250D) 254 200 50 50 48 45
(300D) 254 35 33 30 27
(250D) 254 250 50 50 50 50
(300D) 254 50 50 50 50
(400D) 306 50 50 50 50
(500D) 306 38 35 32 29
(400D) 306 300 50 50 50 50
(500D) 306 50 50 50 50
(600D) 306 50 50 50 50
(700D) 356 50 50 50 50
(800D) 356 45 40 35 31
(900D) 356 32 27 22 17
(1000D) 356 26 21 15 12
(700D) 356 350 50 50 50 50
(800D) 356 50 50 50 50
(900D) 356 50 50 50 50
(1000D) 356 50 50 50 42
(1150D) 356 35 25 14 –
(1300D) 356 17 6 – –
(1150D) 356 400 50 50 50 50
(1300D) 356 50 50 50 50
(1440D) 356 50 50 50 42
(1700D) 500 500 50 50 50 50
(2000D) 500 500 50 50 50 50
Notice: The data contained in the table “Dimensions flue gas systems” represent guide values.
An exact calculation for the flue gas duct must be made on site.
* With 5 bends or more the feed pressure total at the combustion air/flue gas pipe is to be reduced by 30% for the calculation.
4.4 Flue gas line dimensions
(negative pressure)
The flue gas system is to be dimensioned in such a way
that no back circulation is possible in the room. A safe
operation of the flue gas system has to be proved by ap -
proved measuring principles.
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INSTALLATION