REMEHA P 320 Service Manual download pdf (Page 13)

20/09/2011 - 300016243-001-D P 320

6 Chimney connection

The high-performance features of modern boilers and their use in

specific conditions as a result of the advance in burner technology

(e.g. first-stage or low modulation range operation) lead to very low

flue gas temperatures (<160°C).

For this reason:

- Use flue gas pipes designed to enable the flow of condensates

which may result from such operating modes in order to prevent

damage to the chimney.

- Install a draining tee at the bottom of the chimney.

The use of a draught moderator is recommended as well.

6.1 Flue size

Refer to applicable regulations while determining the size of the flue.

Please note that P 320 boilers have pressurised and tight furnaces

and that the pressure at the nozzle must not exceed 0 mbar, unless

special sealing precautions have been taken, for instance in order to

connect a static condenser/regenerator.

6.2 Chimney connection

The connection shall be removable, and offer minimum load losses,

i.e. it must be as short as possible with no sudden change in section.

Its diameter shall always be at least equal to that of the boiler outlet,

i.e.:

Ø 180 mm: for 4 to 6 sections

Ø 200 mm: for 7 to 9 sections

Fit a measuring point (Ø 10 mm hole) on the flue, in order to adjust

the burner (combustion check).

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REMEHA P 320 Service Manual Page 13