Install Instructions

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IV. Venting C. Polypropylene Venting (continued)
CAUTION
Bending or attempting to install exible pipe if it
has been stored at ambient temperature below
41°F (5°C) will cause material to become brittle
and lead to cracks.
• When exible polypropylene pipe (liner) is used
for combustion product venting, it must not be
installed at an angle greater than 45 degrees
from vertical plane. This will insure proper
condensate ow back towards the boiler.
CAUTION
Do not install exible polypropylene pipe at an
angle greater than 45 degrees from vertical plane
when used for combustion product venting.
Failure to do so will result in improper condensate
drainage towards the boiler and possible
subsequent vent pipe blockage.
• When exible polypropylene pipe (liner) is used
for combustion air supply to a boiler, the pipe
(liner) can be installed in vertical or horizontal
position.
• Follow flexible polypropylene pipe (liner)
manufacturer specic installation instructions
Figure 14: Vent System Field Modication to Install PVC to PP Adapter (M&G/DuraVent Shown)
regarding application/listing, permits, minimum
clearances to combustibles; installation details
(proper joint assembly, pipe support and routing,
gasket and tting installation, optional tooling
availability/usage, routing thru masonry chimney
for combustion product venting or, combination
of combustion product venting and combustion
air supply).
• When there is a conflict between flexible
polypropylene pipe (liner) manufacturer
installation instructions and Alpine boiler
Installation, Operating and Service Instructions,
the more restrictive instructions shall govern.
Alpine Boiler Two-Pipe Vent System Connector Field
Modication Procedure To Accept Polypropylene Vent
Piping – Floor Mounted Boiler Builds:
Alpine oor mounted boilers are factory supplied with a
model-specic boiler two-pipe CPVC/PVC vent system
connector shipped within a model-specic boiler CPVC
gasketed vent kit carton.
Locate and remove a model-specic boiler two-pipe CPVC/
PVC vent system connector.
When using M&G/DuraVent polypropylene pipe for
combustion product venting modify the two-pipe vent
system connector upper vent connection port (has a ue
temperature sensor port welded on the side) to accept a
PVC to PP boiler adapter, as follows (See Figure 14 ):