Sterling GG - Manual (Page 5)

Figure 5 - Horizontal Vent Termination
Never use pipe other than 4 inch
diameter. Never use PVC, ABS or any other
nonmetallic pipe for venting! To do so may result in
serious damage to the unit and or severe personal
injury or death!
Insert pipe through wall and fasten adaptor box in
place so that the pipe pitches downward 1/4 inch per
foot (21mm/m) toward the outside. Flash and/or caulk
6 inch pipe on outside wall. Install inlet air screen
assembly and fasten to 6 inch pipe with screws. Insert
a continuous length of 4 inch UL 1738 listed vent pipe
through the 4-3/4 inch opening. Position the pipe to
extend a minimum of 12 inches (305mm) beyond the
inlet air screen.
Seal the space between the vent pipe and 4-3/4 inch
opening of the combustion air inlet box using high
temperature silicone sealant. Install defl ector disk on UL
1738 listed vent pipe 2-1/2 inches (63.5mm) from inlet
air screen and fasten with screws. Install vent terminal
on end of UL 1738 listed vent pipe, fasten with screws
and seal joint (see Figure 5).
Connect fl ue pipe and combustion air pipe from
combustion air inlet box to unit following “Venting”
instructions on pages 7 and 8. Joint between UL 1738
listed vent pipe and single wall vent pipe must be sealed
with high temperature silicone sealant.
Collars on unit and on combustion air inlet box are sized
so that crimped ends of combustion air pipes go toward
the unit and crimped ends of fl ue pipes go away from
the unit.
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