32
PHTM II
Combi Installation, Operating & Service Instructions
110331-07 - 8/23
WARNING
Asphyxiation Hazard.
If using stainless steel screw to attach rain
cap, always drill clearance hole in rain cap
and pilot hole in vent pipe appropriate for
screw size to avoid cracking PVC components.
Failure to comply may cause product damage
or improper operation, resulting in substantial
property damage, or death.
CPVC/PVC Concentric Terminal
WARNING
Asphyxiation Hazard.
All CPVC/PVC vent joints must be glued. Failure
to comply could cause products of combustion
and/or carbon monoxide to enter the building,
resulting in severe personal injury, death or
substantial property damage.
1. Concentric vent terminals listed in Table 8-9 may
be used to terminate air and vent outside
building per Figure 9-6. Both air and vent pipes
must attach to terminal kit.
2. Required vent pipe and fittings listed in Table
7-11.
3. Follow terminal manufacturer's instructions and
Figure 9-7 for assembly.
Figure 9-6: CPVC/PVC Concentric Terminal
!
9
Vertical Direct Venting
(continued)
From boiler
vent connection
To boiler
air connection
12" (305mm) Min. (USA)
18" (460mm) Min. (Canada)
24" (610mm) Max.
Roof or
snow line
Figure 9-7: CPVC/PVC Concentric Vertical
Installation
Wye Fitting
Clamp or Strap
(field supplied)
Roof
Line
Rain Cap
Outer Pipe
Inner Pipe
Storm collar and
Roof Flashing or
equivalent
(field supplied)
Elbow
(field supplied)
Location of
optional screen
Vent
Combustion air
Combustion air
Vent
4. If needed, terminal can be shortened. Follow
terminal manufacturer's instructions and
Figure 8-12.
WARNING
Asphyxiation Hazard.
Ensure rain cap is installed before operating
boiler. Operation without rain cap installed could
cause product damage or improper operation,
resulting in severe personal injury, death or
substantial property damage.
!
!
WARNING
Do not install U-bend or any other fittings on
terminal rain cap. Failure to comply could
cause product damage or improper operation,
resulting in severe personal injury, death or
substantial property damage.
!
Figure 9-8: Do Not Install U-bend or Any Other
Fittings on Terminal Rain Cap