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SMOKE DISCHARGE GENERAL INSTRUCTIONS
The exhaust pipe and the flue connector should be made in compliance with the Regulations and Laws in
force. They should be made up of metal and stiff ducts, capable of resisting to mechanical, thermal and
chemical stress caused by the combustion.
All the components of the exhaust system should compulsorily be EEC certified.
In order to prevent the condensate from flowing back from the flue to the warm air heater, a
condensate discharge should be compulsorily placed in the lowest part of the exhaust pipe (see
scheme).
The weight of the pipe should not be wholly borne by the warm air heater.
The flue should ensure the minimum vacuum level specified by the Technical Rules in force, considering as
"zero" pressure the pressure at the union with the smoke pipe.
Non insulated exhaust pipes might be a source of dangers.
Unsuitable or wrongly sized flues or flue gas pipes might amplify the burning noise and affect negatively the
combustion parameters.
Joint seals should be made of materials resistant to the thermal and chemical stress caused by
the combustion products.
If walls and/or covers have to be crossed, this operation should be perfectly carried out, preventing seepage
or fire risks.
Moreover, we suggest:
•
avoiding or having just few horizontal ducts, which should anyway be upward raked;
•
usemetal pipes with a smooth internal surface capable of resisting the thermal and
chemical stress caused by the combustion products, with the same diameter as the
connector of the machine or with a larger diameter;
•
avoid narrow bends and section reductions;
•
having a trap to take and analyse the combustion products;
•
properly anchoring the flue gas discharge pipe;
•
having a proper end cover to prevent rainwater seepage into the machine and significant friction
losses.
The fume pipe connecting the machine to the flue should be easily dismantled; this is a
basic condition to enable the personnel to easily control and clean inside the heat
exchanger
.
