Install Instructions

34 103448-08- 9/16
• Brace exterior piping if required.
c. Optional Two-Pipe Termination into IPEX Low
Prole or DiversiTech HVENT Terminal –
horizontal thru sidewall, see Figures 6D and 6F.
i. Vent Piping
• Install re stops where vent passes through
framed walls. The re stop must close
the opening between the vent pipe and the
structure.
• Follow IPEX Low Prole or DiversiTech
HVENT terminal instructions for
installation details.
ii. Combustion Air Piping
• Follow IPEX Low Prole 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 re stops where vent passes through
oors, ceilings or framed walls. The re
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 ashing and storm collar, which are not
supplied with boiler, to prevent moisture from
entering the structure.
- Install storm collar on vent pipe
immediately above ashing. Apply
Dow Corning Silastic 732 RTV
Sealant 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 conguration.
• 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 ashing and storm collar
to prevent moisture from entering the
structure.
- Use appropriately designed
vent ashing when passing through
roofs. Follow ashing manufacturers’
instructions for installation
procedures.
- Extend combustion air 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.
- Install storm collar on combustion air
pipe immediately above ashing.
Apply Dow Corning Silastic 732 RTV
Sealant or equivalent between
combustion air pipe and storm collar to
provide weather-tight seal.
• Install rodent screen and combustion air
terminal (supplied with boiler). See Figure
13 for appropriate conguration.
• Brace exterior piping if required.
b. Optional Two-Pipe Termination into IPEX FGV
or DiversiTech CVENT Concentric Terminal –
vertical thru roof, see Figures 7B and 7C.
i. Vent Piping
• Install re stops where vent passes through
oors, ceilings or framed walls. The re
stop must close the opening between the
vent pipe and the structure.
• Follow IPEX FGV or DiversiTech CVENT
concentric terminal instructions for
installation details.
ii. Combustion Air Piping
• Follow IPEX FGV or DiversiTech CVENT
concentric terminal instructions for
installation details.
IV. Venting B. CPVC/PVC Venting (continued)