Buderus Logano plus GB312 Applications Manual page 21

GB312 Applications Manual
5.4 Design of flue and air pipe for balanced flue
operation (refer to NFPA54 ANSIZ223.1 for
dimensions)
4
Fig. 13 Wall-exit air supply pipe, roof-exit exhaust
1 Flue outlet (type of outlet depends on chosen manufac-
turer, e.g. 90° elbow or T-piece) See Fig. 9.
2 Air inlet (T-piece fitted horizontally or 90° elbow)
3 External wall
4 Roof
Fig. 14 Wall-exit air supply pipe and exhaust
1;2 Flue outlet (external-wall flue requires horizontally or verti-
cally mounted T-piece), observe clearances specified in
Fig. 11
3 Air intake terminal (90° elbow facing vertically down-
wards)
4 External wall
H Refer to NFPA54, ANSIZ223.1 National Fuel Gas Code for
details
1
1
1
2
2
3
7 747 010 720-17.2RS
1
H
2
3
4
7 747 010 720-20.2RS
2
Fig. 15 Roof-exit air supply pipe and exhaust
1 Flue outlet (type of outlet depends on chosen manufac-
turer, e.g. 90° elbow or T-piece), observe clearances
specified in Fig. 5
2 Air inlet terminal (90° elbow pointing away from flue outlet)
3 Roof
2
Fig. 16 Roof-exit air supply pipe, wall-exit exhaust
1 Flue outlet (external-wall flue requires horizontally
mounted T-piece or 90° elbow facing downwards)
2 Air inlet (90° elbow or T-piece)
3 External wall
4 Roof
1
1
1
3
7 747 010 720-19.2RS
2
4
1
3
7 747 010 720-21.2RS
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