Chimney Installation for ONGAS 300/W Series
1- ONGAS 300/W Series Condensing Boiler
2- Chimney Clamp
3- Flue gas pipe
4- Bend 90
o
5- Flue pipe with wall diaphragm
6- Bend 90
o
7- Flue gas pipe
8- Chimney cap
All horizontal flue gas pipes must be installed
with 3
o
angle for condensed water to flow back .
There must be empty space between flue gas
pipes and inner wall.
Round shaped ; 3mm
Square shaped ; 2mm
Sample flue length calculation (B23 type)
(For ONGAS 304/W Series Condensing Boiler)
1 x Chimney Clamp = 0,3 m
1 x Flue pipe = 2 m
1 x Bend 90
o
= 2m
1 x Flue pipe = 2 m
1 x Bend 90
o
= 2m
1 x Flue pipe = 6 m
1 x Flue pipe(in chimney cap) = 2 m
Effective length = 0,2+2+2+2+2+6+2=16,2m
Result 16,2 m < 28 m OK
* These are only indicative value because the loss of the flue is different for every manufacturer.
* Flue length must be calculate according to the Maximum Pressure on table are given.
* Deviations in the flue systems and pipes must be calculate according to EN 13384-1 .
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2
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5
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8
Connect the boiler to the flue using a pipe made of stainless steel or plastic material with an internal
diameter (diameters can be changed according to boiler models), capable of resisting normal
mechanical stresses over time, as well as high temperatures
(<120°C) and the chemical effects of fuel
gases and their condensates. Whenever possible use a flue connection that can be disconnected for
maintenance. Horizontal flue sections must have a minimum slope of 3° towards the boiler. Flue
accessories made of plastic material for cascade or single installations are available all joints and
seams should be gastight and watertight with the horizontal runs graded towards the boiler (min.
discharge 5 cm per meter) to allow condensate free drainage to the boiler. Flue gas discharges longer
than 2 meters must be supported independently and may not rest on the boiler. The flue outlet should
terminate with reduction cone and bird guard only.
Summary of Contents for ONGAS 300/W Series
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