Reznor RPBL Unit Installation Manual - Manual (Page 15)

Form I-SSCBL/RPBL, P/N 149159 R7, Page 15
6.2 Venting and
Combustion Air
6.2.1 Separated-Combustion Model SSCBL
Each furnace section in the packaged system MUST BE equipped with both combus-
tion air and exhaust piping to the outdoors. Refer to FIGURES 2 and 3 in Paragraph
4.1 for locations of vent and inlet air collars. The vent pipe collar is 6" O.D.; the inlet air
collar is 6" I.D. Either a horizontal (Option CC6) or vertical (Option CC2) combustion
air inlet/vent terminal concentric adapter assembly must be ordered for field installation
to each furnace section. Each concentric adapter assembly is shipped in a separate
carton. Be sure that the concentric adapter carton(s) are at the installation site.
These instructions apply to installation and use of the concentric adapter and vent/
combustion air kits (Option CC2 or CC6) designed for use with all Model SSCBL sys-
tems. The vent/combustion systems illustrated in this manual are the only vent/com-
bustion air systems approved for use with a Model SSCBL packaged heating system.
WARNING
Do not use an existing venting system. Installation of a combus-
tion air/vent system ordered as Option CC2 or Option CC6 is
required for each furnace section.
Installation should be done by a qualified agency in accordance with these instruc-
tions. The qualified service agency installing this separated-combustion system is
responsible for the installation.
WARNING
Model SSCBL separated combustion units are not designed or
approved for use in atmospheres containing flammable vapors
or atmospheres highly laden with chlorinated vapors. See Hazard
Levels, page 2.
6.2.1.1 Specific Venting
Requirements - Model
SSCBL
(read all venting
information before
installing)
1) Vent/Combustion Air Kit (ordered with the heater as either Option
CC2 or Option CC6)
All Model SSCBL installations require a vent/combustion air kit for each furnace sec-
tion.
Follow the instructions on pages 19-21 to install a horizontal vent/combustion air sys-
tem (Option CC6). Follow the instructions on pages 22-25 to install a vertical vent/
combustion air system (Option CC2).
2) Type of Pipe (field-supplied)
Vent Pipe Between the Furnace Section and the Concentric Adapter Box - Use
either vent pipe approved for a Category III appliance OR single-wall, 26-gauge or
heavier galvanized (or a material of equivalent corrosion resistance) vent pipe.
Vent Pipe Between the Concentric Adapter Box and the Vent Cap - Double-wall
(Type B) vent pipe is required. The length of vent pipe that extends through the box
and runs concentric through the combustion air pipe must be one-piece with no joints.
Combustion Air Inlet Pipe - Sealed, single-wall galvanized pipe is recommended.
3) Venter Outlet and Combustion Air Inlet Collars
Each furnace section has both an inlet air and a venter outlet connection (See FIGURE
2). Both are 6" diameter for all sizes.
•
NOTE: If using 7" pipe (see table
below), use a taper-type 6" to 7"
enlarger to attach the vent pipe
and a 7" to 6" reducer to attach
the combustion air pipe.
Taper-type
Enlarger
Airflow
Taper-type
Reducer
Airflow
4) Pipe Diameter and Length
Pipe diameters and maximum indoor vent lengths apply to both horizontal and vertical
vents. Add all straight sections and equivalent lengths for elbows. The total length of
the straight sections and elbows must not exceed the Maximum Length.