Form I-SSCBL/RPBL, P/N 149159 R8, Page 16
FIGURE 11 - Follow
STEPS to join Double-
Wall (Type B) Pipe and
the Vent Terminal Cap
(horizontal or vertical)
Figure 11 - STEP 1
Place a continual 3/8” bead of silicone sealant
around the circumference of the vent cap collar.
This will prevent any water inside the vent cap
from running down the double-wall pipe.
Do STEP 2 immediately following STEP 1.
Figure 11 - STEP 2
Insert the collar on the vent cap inside
the inner wall of the double-wall pipe.
Insert as far as possible. Add addi-
tional silicone sealant to fully close
any gaps between the vent cap and
the double wall pipe. This is neces-
sary to prevent water from entering
the double wall pipe.
Secure the vent cap to the double-wall pipe by drilling and inserting a 3/4” long
sheetmetal screw into the vent cap collar. Do not overtighten screw.
Figure 11 - STEP 3
(
NOTE
: Pipes and vent
caps may not look exactly
as shown in the illustrations.
Instructions apply to both
horizontal and vertical vent
kits.)
6.2.1 Separated-
Combustion Model
SSCBL (cont'd)
6.0 Mechanical
(cont'd)
Maximum Pipe Length from EACH Furnace Section to a Unique
Concentric Adapter Box --
Minimum length is five feet (1.5M).
Model
SSCBL
Pipe Diameter
Maximum
Length
Equivalent Length for an Elbow
Vent
Inlet Air
90°
45°
500, 600
6"
6"
50 ft
8 ft
4 ft
(15 M)
(2.4M)
(1.2M)
400, 700, 800,
1050, 1200
6"
6"
30 ft
8 ft
4 ft
(9 M)
(2.4M)
(1.2M)
All Sizes
7"
7"
70 ft
8 ft
4 ft
(21M)
(2.4M)
(1.2M)
The outside (terminal) portion of the inlet air pipe is 8" in diameter. The 5" I.D. diameter
double-wall vent pipe runs through the 8" inlet air pipe. See
FIGURE 13
, page 17. The
outdoor lengths depend on the installation. Outdoor vent length requirements are listed
in the installation instructions for the horizontal and vertical vent/combustion air kits.
5) Joints/Seals
Provide pipe as specified in Requirement No. 2 and make joints as follows:
• If using Category III
vent pipe runs,
follow the pipe manufacturer’s instructions
for joining and sealing Category III vent pipe sections.
• If using single-wall
vent pipe runs,
secure slip-fit pipe connections using
sheetmetal screws or rivets. Seal all joints with aluminum tape or silicone sealant.
• To seal joints in the single-wall
combustion air pipe,
secure slip fit pipe
connections using sheetmetal screws or rivets. Seal all joints with aluminum tape
or silicone sealant.
• To seal joint in the terminal section of
double-wall vent pipe (allowed
ONLY ABOVE the concentric pipes on a VERTICAL vent),
follow the pipe
manufacturer’s instructions for joining and sealing double-wall vent pipe sections.
• When joining the terminal section of
double-wall vent pipe to the vent cap,
follow the illustrated step-by-step instructions in
FIGURE 11.
When joining the terminal section of double-wall vent pipe to a single-wall
or Category III vent pipe run,
follow the illustrated step-by-step instructions in
FIGURE 12.
6.2.1.1 Specific
Venting Requirements
(cont'd) (
read all before
installing
)
4) Pipe Diameter and Length (cont'd)
6.2 Venting and
Combustion Air
(cont'd)