Install Instructions

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• When thimble is not used for non-
combustible wall, size and cut wall opening
such that a minimal clearance is obtained
and to allow easy insertion of vent pipe.
• Apply sealant between vent pipe and
thimble or wall opening to provide weather-
tight seal. Sealant should not restrain the
expansion of the vent pipe.
• Install Rodent Screen and Vent Terminal
(supplied with boiler). See Figure 10 for
appropriate conguration details.
WARNING
All CPVC pipe supplied with boiler vent carton
must be used as part of vent system prior to
connecting supplied PVC vent terminal.
Methods of securing and sealing terminals
to the outside wall must not restrain the
thermal expansion of the vent pipe.
ii. Combustion Air Piping
• Do not exceed maximum combustion air
pipe length. Refer to Table 8.
• Size combustion air pipe wall penetration
opening to allow easy insertion of the pipe.
• Install Rodent Screen and Combustion Air
Terminal (supplied with boiler). See Figure
10 for appropriate conguration details.
• Apply sealant between combustion air pipe
and wall opening to provide weather-tight
seal.
CAUTION
To avoid cross-contamination, extend the
distance between adjacent vent terminations.
Figure 9A : Direct Vent - Sidewall Terminations
b. Optional Two-Pipe Snorkel Termination
See Figures 10 and 11.
This installation will allow a maximum of seven (7)
feet vertical exterior run of the vent/combustion air
piping to be installed on the CPVC/PVC horizontal
venting application.
NOTICE
Exterior run to be included in equivalent vent/
combustion air lengths.
i. Vent Piping
• After penetrating wall, install a Schedule 40
PVC 90° elbow so that the elbow leg is in
the up direction.
• Install maximum vertical run of seven (7) feet
of Schedule 40 PVC vent pipe. See Figure
11.
• At top of vent pipe length install another PVC
90° elbow so that elbow leg is opposite the
building’s exterior surface.
• Install Rodent Screen and Vent Terminal
(supplied with boiler), see Figure 10 for
appropriate conguration.
• Brace exterior piping if required.
ii. Combustion Air Piping
• After penetrating wall, install a Schedule 40
PVC 90° elbow so that elbow leg is in the
up direction.
• Install maximum vertical run of seven (7) feet
of Schedule 40 PVC vent pipe. See Figure
11.
IV. Venting B. CPVC/PVC Venting (continued)
Figure 8: Wall Penetration Clearances for PVC Vent Pipe