Reznor SCE Unit Installation Manual - Manual (Page 10)

Form RZ-NA I-SCE, Page 10
6) Clearance Do not enclose the vent pipe or place pipe closer than 6" (152mm) to combustible material.
All separated combustion installations require a concentric adapter box as illustrated in FIGURE 10.
The concentric adapter box is included in the vent/combustion air kit. Installation instructions depend
on whether the vent system is horizontal (Option CC6) or vertical (Option CC2).
7) Concentric
Adapter Box
FIGURE 10 - A Concentric Adapter Box is a
Required Part of all Model SCE Installations
View of Heater Connection Side
View of Vent Terminal Connection Side
End View
showing
Airflow
Gray Arrows
show Flow of
Combustion Air
Vent (exhaust gas) flows through
field-supplied double-wall pipe
that extends straight through
the concentric adapter box.
P/N 205885, Concentric Adapter Box
Top View
Heater Side View
6” Collar for
Combustion
Air Pipe
Opening for
vent pipe to
pass through
the box
2” (51mm)
2” (51mm)
6-1/32”
(153mm)
8” dia Collar for
Combustion Air Pipe
14-1/4”
(362mm) 5”
(127mm)
5-7/32”
(133mm)
5-21/32”
(144mm)
diameter
5-9/32”
(134mm)
4”
(102mm)
13-3/8” (340mm)
Collar for connecting
indoor portion of the
combustion air pipe
Opening for
double-wall vent
pipe to pass
through the box.
Collar for
attaching outside
concentric portion
of the combustion
air pipe
9. Venting and Combustion Air (cont'd)
Specific Venting Requirements (cont'd)
Concentric Adapter Box Airflow