Reznor RPBL Unit Installation Manual - Manual (Page 18)

Form I-SSCBL/RPBL, Page 18
FIGURE 14 -
Concentric Adapter
Box Connections
(6" or 7" pipe)
Requires a 6 to 5 inch (152 to 127mm)
taper-type reducer a maximum of 6”
(152mm) from the concentric adapter
box.
6” (152mm) diameter single-wall
inlet air pipe attaches to the heater
5” (127mm)
inside diameter
double-wall
vent pipe
Top View of Concentric Adapter
Box showing
Pipe Connections
6” (152mm) diameter single-wall
or Category III vent pipe attaches
to the heater
8” (203mm)
diameter
single-wall
inlet air pipe
Model SSCBL - Pipe diameters and connections required at each
concentric adapter box when using 6” pipes between the furnaces
and the boxes
• If using 6” diameter
pipes, a 6” to 5” (152
to 127 mm) reducer is
required in the vent pipe.
Taper-type
Reducer
Airflow
• If using 7” diameter
pipes, a 7” to 5” (178
to 127 mm) reducer
is required in the vent
pipe and a 6” to 7” (152
to 178mm) enlarger is
required for attaching the
combustion air pipe.
Model SSCBL - Pipe diameters and connections required at each
concentric adapter box when using 7” pipes between the furnaces
and the boxes
Requires a 7 to 5 inch (178 to 127mm)
taper-type reducer a maximum of 6”
(152mm) from the concentric adapter box.
7” (178mm) diameter single-wall
inlet air pipe attaches to the heater
5” (127mm)
inside diameter
double-wall
vent pipe
Top View of Concentric Adapter
Box showing
Pipe Connections
7” (178mm) diameter single-wall
or Category III vent pipe attaches
to the heater
8” (203mm)
diameter
single-wall
inlet air pipe
Requires a 6 to 7 inch (152 to 178mm)
taper-type enlarger at the concentric
adapter box.
Taper-type
Reducer
Airflow
Taper-type
Enlarger
Airflow
Horizontal, Option
CC6, instructions
begin on page 19.
Vertical, Option
CC2, instructions
begin on page 22.
Is the Vent Terminal HORIZONTAL OR VERTICAL?
When pipe diameters differ, depending on direction of airflow, join the pipes with either
a taper-type reducer or enlarger. Refer to illustrations in FIGURE 14 for pipe connec-
tion requirements at the concentric adapter box.
Do
NOT make actual connections until after reading the instructions and length require-
ments for installing the vent/combustion air kit. The connection requirements are the
same for both vertical and horizontal systems, but the length of the double-wall
pipe will vary.
Pipe Connections at the Concentric Adapter Box
6.2 Venting and
Combustion Air
(cont'd)
6.2.1 Separated-
Combustion Model
SSCBL (cont'd)
6.0 Mechanical
(cont'd)
Follow the
instructions for
the Vent Terminal
being installed:
6.2.1.1 Specific Venting Requirements (cont'd) (read all before installing)