34
103448-10- 6/18
IV. Venting
B. CPVC/PVC Venting (continued)
• Install maximum vertical run of 7 ft. (2.1 m) of Schedule 40 PVC vent pipe. See Figure 6A.
• Install another PVC 90° elbow at top of vent pipe length so that elbow leg is opposite the building’s
exterior surface.
• Install rodent screen and vent terminal (supplied with boiler, see Figure 13 for appropriate
configuration.
• 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 7 ft. (2.1 m) of Schedule 40 PVC air pipe. See Figure 6B.
• Install another PVC 90° elbow at top of air pipe length so that elbow leg is opposite the building’s
exterior surface.
• Install rodent screen and combustion air terminal (supplied with boiler). See Figure 13 for
appropriate configuration.
• Brace exterior piping if required.
c.
Optional Two-Pipe Termination into IPEX Low Profile or DiversiTech HVENT Terminal – horizontal thru
sidewall, see Figures 6D and 6F.
i
.
Vent Piping
• Install fire stops where vent passes through framed walls. The fire stop must close the opening
between the vent pipe and the structure.
• Follow IPEX Low Profile or DiversiTech HVENT terminal instructions for installation details.
ii
.
Combustion Air Piping
• Follow IPEX Low Profile or DiversiTech HVENT terminal instructions for installation details.
7. Vertical Roof Termination
a. Standard Two-Pipe Termination, see Figures 7 and 8.
i
.
Vent Piping
• Install fire stops where vent passes through floors, ceilings or framed walls. The fire stop must close
the opening between the vent pipe and the structure.
• Whenever possible, install vent straight through the roof. Refer to Figures 7 and 8.
- Size roof opening to maintain minimum clearance of 1 in. (25 mm)
from combustible materials.
- Extend vent pipe to maintain minimum vertical and horizontal distance of 12 in. (300 mm) from
roof surface. Allow additional vertical distance for expected snow
accumulation. Provide brace as required.
NOTICE
Vertical venting and combustion air roof penetrations (where applicable) require the
use of roof flashing and storm collar, which are not supplied with boiler, to prevent moisture
from entering the structure.
-
Install storm collar on vent pipe immediately above flashing. Apply Dow Corning Silastic 732
RTVSealant or equivalent between vent pipe and storm collar to provide weather-tight seal.
• Install rodent screen and vent terminal (supplied with boiler). See Figure 13 for appropriate
configuration.
• Brace exterior piping if required.
ii
.
Combustion Air Piping
• If possible, locate combustion air termination on the same roof location as the vent termination to
prevent nuisance boiler shutdowns. Combustion air terminal may be installed closer to roof than
vent. Alternatively, boiler may be installed with vertical roof vent terminal and sidewall combustion air
terminal.
• Size roof opening to allow easy insertion of combustion air piping and allow proper installation of
flashing and storm collar to prevent moisture from entering the structure.
- Use appropriately designed vent flashing when passing through roofs. Follow flashing
manufacturers’ instructions for installation procedures.
- Extend combustion air pipe to maintain minimum vertical and horizontal distance of 12 in.
Summary of Contents for Alpine ALP080B
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Page 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
Page 78: ...78 103448 10 6 18 Figure 28 Ladder Diagram VIII Electrical continued...
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