35
110331-07 - 8/23
PHTM II
Combi Installation, Operating & Service Instructions
Abandoned Chimney Chase
1. Abandoned chimney may be used as a chase
with flexible polypropylene vent pipe only if all of
the following conditions are met:
A. Chimney is structurally sound and in good
condition.
B. No other appliances or fireplaces are
vented into chimney or adjacent flues.
Use concentric terminal and flexible
polypropylene listed in Table 9-15 to terminate
vent outside building. Terminate air through
sidewall using PVC or polypropylene fittings. See
Figure 9-16.
2. Follow vent system manufacturer's instructions for
assembly.
WARNING
Asphyxiation Hazard.
Only abandoned (unused) masonry chimney
may be used as a chase. If chimney contains
multiple flues, all flues must be abandoned.
Failure to comply could cause product damage
or improper operation resulting in severe
personal injury, death or substantial property
damage.
9
Vertical Direct Venting
(continued)
!
Table 9-15: Polypropylene Masonry Chimney Chase
Components
DuraVent
PolyPro
Centrotherm
InnoFlue
Selkirk PolyFlue
2PPS-FKC
chimney kit +
2PPS-FLEX*
flex length
IFCK02*
chimney kit
with flex length
2PF-FLEX-KIT
chimney kit + 2PF-
FLEX length
* Length (25, 35, or 50 ft.), e.g. 2PPS-FLEX25 for 25
ft. length
Note: 2 in. (60 mm) components shown. Replace "2"
with "3" for 3 in. (80 mm) part numbers.
Figure 9-16: Masonry Chimney Chase System
Figure 9-17: Masonry Chimney Chase
Requirements
Clean, tight
unused chimney
Base support
and elbow for
PPs flex pipe
Exterior
Wall Plate
Duravent Polypro
Vent Pipe
Outside Wall
PPs Flex
Elbow
with screen
Grade/Snow Line
Vent
Note: Duravent Polypro Flex
components shown.
12" (305mm) Min
Boiler
Air Intake Pipe
WITH CROWN
45° MAX
BOILER
CHIMNEY AND
FOUNDATION ARE
STRUCTURALLY SOUND
Figure 9-18: Masonry Chimney Chase and Any
Adjacent Flues must be Abandoned
BOILER
WARNING
Asphyxiation Hazard.
Do not use flexible polypropylene outside of
masonry chimney. Failure to comply could
cause product damage or improper operation
resulting in severe personal injury, death or
substantial property damage.
!
