Filter
Top Products
15
6. Install Rodent Screen and Vent Terminal (supplied
with boiler), see Figure 8 for appropriate
conguration.
7. Apply sealant between vent pipe and opening/
thimble to provide weather-tight seal. Sealant
should not restrain the expansion of the vent pipe.
Combustion Air Piping - Horizontal
1. See Paragraph D for instructions on attaching the
vent system connector to the boiler.
2. Do not exceed maximum combustion air length.
Refer to Table 7 for pipe diameters and allowable
lengths.
3. Horizontal combustion air pipe must maintain a
minimum ¼ inch per foot slope down towards
terminal, when possible. If not, slope toward boiler.
4.
It is strongly recommended to locate the combustion
air terminal on the same wall as the vent termination
to prevent nuisance boiler shutdowns. Combustion
air terminal can be installed closer to wall than vent.
5. Start at vent connector (rear boiler jacket) and work
towards the combustion air terminal.
6. Size combustion air wall penetration to allow easy
insertion of combustion air piping.
Figure 4: Field Installation of Two Pipe Vent System Connector for CPVC/PVC
Figure 5: Near-Boiler Vent/Combustion Air Piping