24
5.10 (3" /80 mm Only) Flexible Vent System
Single Wall Elbows - Equivalent Length
3" [80 mm]
45° bend
0.82 ft [0.25 m]
90° bend
1.64 ft [0.50 m]
•
Maximum vent lengths based on equivalent straight
runs only. Include rigid pipe and fittings in overall
equivalent length calculations.
•
Flexible venting installations use single wall
polypropylene to pass flue gasses to base of chimney,
then flexible venting to get them to termination at the
top.
• Combustion air is not supplied through masonry
chimney. Combustion air must be from outside using 3"
[80 mm] single wall polypropylene.
•
Position boiler to use minimum of rigid single wall
polypropylene venting to the chimney.
•
Follow venting manufacturer's instructions on assembly
and clearances to maintain.
•
Avoid sharp bends in flexible venting.
FIGURE 5-24 - (3" / 80 mm Only) Flexible Venting
System CAN BE USED ON ALL SIZES
Combustion
Air
Vent Terminal
Flexible Vent
Rigid Vent
5 - COMBUSTION AIR AND VENT PIPING
NOTICE
Flexible vent systems shall only be run vertical.
Horizontal runs before adapting to flexible must be
rigid pipe.
Flexible Pipe Minimum & Maximum Vent Lengths
3” [80 mm]
Diameter Pipe
125/150
165/205
Min
Max
Min
Max
Natalini
Exhaust
6 ft
[1.8 m]
75 ft
[22.8 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
DuraVent
®
Exhaust
6 ft
[1.8 m]
82 ft
[24.9 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Centrotherm
Exhaust
6 ft
[1.8 m]
52 ft
[15.8 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Z-Dens
Exhaust
NA
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
240012879 REV A, [01/31/2020]
Summary of Contents for Dunkirk DCBF-125
Page 63: ...61 A 1 MODELS 125 Heat Only APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 64: ...62 APPENDIX A WIRING DIAGRAMS A 2 MODELS 165 Heat Only 240012879 REV A 01 31 2020...
Page 65: ...63 A 2 MODELS 150 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 66: ...64 A 4 MODELS 205 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 67: ...65 NOTES 240012879 REV A 01 31 2020...
Page 68: ...66 NOTES 240012879 REV A 01 31 2020...
Page 99: ...29 MODEL 150F Combi 150F FLOOR STANDING COMBI WIRING DIAGRAM PN 240012875 REV A 01 31 2020...
Page 101: ...31 205F FLOOR STANDING COMBI WIRING DIAGRAM MODEL 205F Combi PN 240012875 REV A 01 31 2020...
Page 106: ...36 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240012875 REV A 01 31 2020...
Page 114: ...44 NOTES PN 240012875 REV A 01 31 2020...
