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Heatilator • CD4236IFTR, CD4236IFTLR, CD4842IFTR, CD4842IFTLR Installation Manual • 2511-980 Rev. M
• 8/21
7
7
Venting and Chimneys
A. Assemble Vent Sections
(DVP Pipe Only)
Attach Vent to the Firebox Assembly
Note:
The end of the pipe sections with the lanced tabs
will face toward the appliance.
Attach the first pipe section to the starting collar:
• Lanced pipe end of the starting collar.
• Inner pipe over inner collar.
• Push the pipe section until all lanced tabs snap in place.
• Lightly tug on pipe to confirm it has locked.
Figure 7.2
A
B
Figure 7.3
Assemble Pipe Sections
Per Figure 7.2:
• Start the inner pipe on the lanced end of section A into
the flared end of section B.
• Start the outer pipe of section A over the outer pipe of
section B.
• Once both vents sections are started, push firmly until
all lanced tabs lock into place.
• Lightly tug on the pipe to confirm the tabs have locked.
It is acceptable to use screws no longer than 1/2 in. (13
mm) to hold outer pipe sections together. If predrilling holes,
DO NOT
penetrate inner pipe.
For 90º and 45º elbows that are changing the vent direction
Required Commercial, Multi-family (Multi-level exceeding
two stories), or High-Rise Applications
All outer pipe joints must be sealed with 100% silicone
(300 ºF minimum continuous exposure rating), including
the slip section that connects directly to the horizontal ter
-
mination cap.
• Apply a bead of silicone sealant (300 ºF minimum con
-
tinuous exposure rating) inside the female outer pipe
joint prior to joining sections. See Figure 7.1.
OR
Apply a bead of silicone sealant (300 ºF minimum con
-
tinuous exposure rating) to the outside of connecting
joint after joining sections
OR
Apply aluminum foil tape (300 ºF minimum continuous
exposure rating) to the outside of connecting joint after
joining sections. On horizontal pipe runs, it is recom
-
mended that the tape seam is positioned on the bottom
side of the vent pipe.
• Only outer pipes need to be sealed. All unit collar, pipe,
slip section, elbow and cap outer flues shall be sealed
in this manner, unless
otherwise stated.
WARNING! Risk of Fire or Explosion! DO NOT
break
silicone seals on slip sections. Use care when remov-
ing termination cap from slip pipe. If slip section seals
are broken during removal of the termination cap, vent
could leak.
Figure 7.4 Seams
Note:
Make sure that the
seams are not aligned to prevent
unintentional disconnection.
INCORRECT
CORRECT
Lances
Lances
Figure 7.1 High Temperature Silicone Sealant
from horizontal to vertical, one screw minimum should be put
in the outer flue at the horizontal elbow joint to prevent the
elbow from rotating. Use screws no longer than 1/2 in. (13
mm). If predrilling screw holes,
DO NOT
penetrate inner pipe.
