2.2 Plastic (Pps) Flue Gas/Ventilation Air System For Separate Ventilation Air And Flue Gas; Routing; To Tröi 2009) - Viessmann Vitoladens 300-C Technical Manual

Design and sizing information for the Vitoladens 300-C, -T, and Vitorondens 200-T, 222-F
Max. total length of the flue up to the boiler flue connection
Rated heating output
at system temperature 50/30 °C
Max. length for system size Ø 80 mm
Max. length for system size Ø 100 mm m
The following components are taken into consideration for the maxi-
mum flue lengths:
■ Balanced flue connection pipe D 0.5 m long.
■ 1 balanced flue bend 87º and 1 support bend 87º
or
■ 2 balanced flue bends 45º and 1 support bend 87º
Subtract other bends, tees and extension pieces from the maximum
length using the following values:
■ Balanced flue connection pipe 0.5 m long: 1 m
■ Balanced flue connection pipe 1 m long: 2 m

2.2 Plastic (PPs) flue gas/ventilation air system for separate ventilation air and flue gas

routing (type C to TRÖI 2009)
83
The Vitoladens may be operated with separately routed flue gas and
ventilation air in balanced flue mode, subject to the flue system meet-
ing the following conditions:
■ Connection to a chimney that is unsuitable for providing the com-
bustion air supply because of deposits.
■ Connection to a moisture-resistant chimney.
The combustion air is then supplied through a separate ventilation air
pipe that is routed separately from the flue pipe.
Observe the design information to TRÖI 2009, point 5.6.
Up to 35.4 kW: Internal diameter, balanced flue pipe: Ø 80 mm
From 42.8 kW: Internal diameter, balanced flue pipe: Ø 100 mm
Max. pipe length:
VITOLADENS, VITORONDENS
kW 19.3 20.2 23.5
m 13 13 16
— — —
24.6 28.9 35.4 42.8
16 16 20 —
— — — 20
■ Balanced flue bends 45º: 0.5 m
■ Balanced flue bends 87º: 1 m
■ Balanced flue inspection tee: 1.5 m
■ Ventilation air pipe from the back edge of the boiler: 14 m
Max. number of bends
■ Flue pipe
– 87º: 2 pce
or
– 45º: 3 pce
■ Ventilation air pipe
– 87º: 4 pce
or
– 45º: 6 pce
Max. pressure drop in the air supply pipe: 35 Pa.
Combustion air temperature at the burner: min. 5 ºC/max. 30 ºC.
Install an inspection port for checking and cleaning the flue pipe.
(cont.)
53.7 67.6 85.8 107.3
— — — —
20 20 20 20
VIESMANN
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