Connecting The Flue Gas Outlet; Air Supply Connection - DeDietrich C 330 Series Installation, User And Service Manual

6 Installation
36
Warning
If the flue gas outlet and air supply materials are not installed in
accordance with the instructions (e.g. not leak-proof, not correctly
bracketed), this can result in dangerous situations and/or physical
injury.
Make sure that the flue gas outlet pipe towards the boiler has a sufficient
gradient (at least 50 mm per metre) and that there is a sufficient
condensate collector and discharge (at least 1 m before the outlet of the
boiler). The bends used must be larger than 90° to guarantee the
gradient and a good seal on the lip rings.
Condensation
Direct connection of the flue gas outlet to structural ducts is not
permitted because of condensation.
If condensate from a plastic or stainless steel pipe section can flow back
to an aluminium part in the flue gas outlet, this condensate must be
discharged via a collector before it reaches the aluminium.
Important
Contact us for more information.
6.4.5

Connecting the flue gas outlet

The boiler is equipped with a mechanical flue gas non-return valve as
standard. This prevents flue gases from flowing back into the boiler when
it is not in operation (cascade settings for example).
Proceed as follows to connect the flue gas outlet:
1. Fit the flue gas outlet pipe to the boiler.
2. Fit the subsequent flue gas outlet pipes in accordance with the
manufacturer's instructions.
Caution
The pipes must be flue gas-tight and corrosion-resistant.
The materials used must comply with the prevailing regulations
and standards.
The flue gas outlet pipe must be smooth and deburred.
Connect the pipes so that they are stress-free.
The pipes must not rest on the boiler or flue gas adapter.
Fit the horizontal parts sloping down towards the boiler, with a
slope of 50 mm per metre.
Maximum bracket spacing for vertical pipes is 2 m.
Maximum tilt of vertical pipes is 20 mm per meter.
Use a bracket at each connection for horizontal pipes.
6.4.6

Air supply connection

1. Fit the air supply pipe to the boiler.
2. Fit the subsequent air supply pipes in accordance with the
manufacturer's instructions.
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