Navien NCB700-2S Plus 42K Installation & Operation Manual page 39

1
7
# Description
1 Boiler
2 Visible air break
3 75 mm trap
4 Soil and vent stack
5 Invert
6 450 mm minimum up to three storeys
Minimum internal diameter 19 mm
7
(fall at least 45 mm per meter)
1
7
2
# Description
1 Boiler
2 Visible air break
3 Visible air break at plug-hole
4 75 mm sink, basin, bath or shower waste trap
5 Sink, basin, bath or shower with integral overflow
Open end of condensate drainage pipe direct into gully 25mm
6
min below grating but above water level; end cut at 45°
Minimum internal diameter 19 mm
7
(fall at least 45 mm per meter)
8 Pipe size transition
9 Minimum internal diameter 30 mm
10 Water/weather proof insulation
2
4
6
3
5
3
5 9 10
4 8
6
4 6
# Description
1 Boiler
2 Visible air break
3 75 mm trap
4 Sink, basin, bath or shower
Open end of condensate drainage pipe direct into gully 25
5
mm min below grating but above water level; end cut at 45°
6 Sink lip
Minimum internal diameter 19 mm
7
(fall at least 45 mm per meter)
8 Pipe size transition
9 Minimum internal diameter 30 mm
10 Water/weather proof insulation
1
2
ø22 mm
# Description
1 Condensate discharge from boiler
2 Visible air break
3 Condensate pump
4 Visible air break at plug hole
5 Sink or basin with integrated overflow
6 75 mm sink waste trap
1
7 2
10
3
8 9
5
4
5
6
3
Installing the System Piping 39