Inspection Apertures - Buderus Logamax plus GB162 Technical Manual

9 Flue systems for open flue operation
9.1.5

Inspection apertures

According to DIN 18160-1 and DIN 18160-5, flue
systems for open flue operation must be able to be
inspected and cleaned easily and safely. For this, allow for
inspection apertures (
When arranging the inspection apertures,
comply with the requirements of
DIN 18160-5 as well as all locally applicable
building regulations. For this we recommend
contacting your local flue gas inspector
[where appropriate].
Position of the lower inspection aperture
• When connecting the Logamax plus GB162 to a flue,
allow for a lower inspection aperture:
– In the vertical section of the flue, immediately above
the flue diversion.
– At the face of the straight horizontal flue section, no
further than 1 m from the diversion into the vertical
section, subject to there being no diversion in
between ( fig. 98, page 114) or
– In the side of the horizontal section of the flue, no
further than 30 cm from the diversion into the
vertical section (
• When connecting the gas condensing boilers to a
moisture-resistant flue system (LAS multiple
connection), provide a lower inspection aperture below
the lowest connection at the base of the vertical
section of the moisture-resistant flue (LAS).
• Provide a floor area of at least 1 m × 1 m to
DIN 18160-5 in front of the lower inspection aperture.
114
fig. 98 and fig. 99).
fig. 99, pos. 4).
Position of the upper inspection aperture
• An upper inspection aperture is not required, if:
– Theinternal diameter of the flue is ≤ DN200.
– The lower inspection aperture at DN160 and
DN200 is arranged in accordance with fig. 99,
pos. 3.
– The lower inspection aperture is located no further
than 15 m from the terminal.
– The vertical flue section is routed at an angle of no
more than 30° (corbelled).
– The lower inspection aperture is implemented in
accordance with DIN 18160-1 and 18160-5
( fig. 98 and fig. 99).
• Upstream and downstream of every diversion in excess
of 30°, an additional inspection bend is required.
• Provide a floor area of at least 0.5 m × 0.5 m to
DIN 18160-5 in front of the upper inspection aperture.
P
1)
1)
Fig. 98 Example with the inspection aperture (P)
located in a horizontal flue without diversions in
the installation room (dim. in m)
1)
Vent to the outside (
2)
3° = 5 cm/m
6 720 645 821 (2010/09) – Logamax plus GB162
< 15
2)
3°
≤ 1
6 720 641 280-45.1il
tab. 44, page 110)