Flue Gas Condensation
Things that can prevent condensation in the boiler and chimney.
1. High chimney> 5m.
Provides a good draft in all conditions.
2. Small clearing in the chimney 125mm-150mm.
Provides better flow, and can "carry“ out more moisture.
3. Short un-insulated smoke pipe <0.3 m
Do not cool down the smoke unnecessarily before it
reaches the chimney.
4. Draft stabilizer.
Stabilizes the draft, and provides the chimney with dry air.
5. High boiler temperature> 70C degrees.
10 degrees up in the boiler temperature gives 10 degrees more smoke temperature.
6. Suitable return temperature> 55C degrees.
Hits the smoke boiler surfaces under 47C degrees, it starts condensing.
7. Open bypass in the boiler.
Release the smoke before the last smoke cooler,
15C degrees increase in temperature of the smoke,
only costs approx. 1% in efficiency.
8. Heated boiler room.
Lowers cooling of the boiler and smoke pipe
and provides draft stabilizer more hot air to work with.
9. More oxygen in combustion.
Increases air flow in the boiler, and carries more moisture,
1% more oxygen costs approx. 0.5% in efficiency.
10. Remove the retarder. (Turbolator)
Decreases resistance of the boiler,
and get a bad chimney to work better
The gas temperature typically increases
to approx. 100 degrees.
The burner should be basic readjusted
after retarder is removed.
11. Keep the heat on the boiler continuously.
When using DHW priority on controller,
and the boiler starts from cold each time it starts
The boiler is not to dried out between each start.
12. Mount electric exhaust fan to chimney.
Helps the flow the right way, from CHIP 6.82
can exhaust fan be connected directly to the controller.
When a boiler has an extremely high efficiency (for example > 93%), the flue gas temperatures
exiting the boiler are very low. As a consequence of this high efficiency and low chimney
temperature relationship, proper precautions must be observed to avoid condensation from
developing in the chimney. Leaving condensation untreated will risk the development of soot in
the chimney, corrosion in your boiler, as well as possible loss of warranty.
Note: that even if
there is water in the boiler it may be due to condensation in the chimney.
Summary of Contents for V7
Page 29: ...CE Declaration of Conformity...