Reznor SFT Unit Installation Manual - Manual (Page 10)

Form RZ -NA-I-SFT, Mfg No. 173474 (Rev 6), Page 9
Building Overhang
3 ft (914mm)
minimum
6-15/16” (176mm)
Vent Pipe
- PITCH
TO
DRAIN
Adjoining
Building
3 ft (914mm)
minimum
Thimble
Wall
16”(406mm)
minimum
24”(610mm)
maximum
IMPORTANT NOTE: Exhaust cap must be installed s
are positioned on horizontal and vertical centerlines a
Building Projection
6ft (1829mm)
minimum
Concentric Adapter Bo
Combustion Air Pipe
(PITCH TO DRAIN)
Figure 6D - Installation of a Typical Separated-Combustion Unit with
Horizontal Vent and Combustion Air Pipes (Option CC6)
Side
View
"Through-the-Wall" View of a typical
installation of a horizontal vent/inlet air
terminal and concentric adapter
(Option CC6)
Screened
Exhaust Cap
Inlet
Air
Guard
Wall
Vent (Flue Exhaust) Pipe
Seal vent pipe joints; see
Requirement No. 4 on page 7.
Combustion Air Pipe (seal joints)
Concentric Adapter Box
60” (1524mm)maximum
12” (305mm) minimum
Maximum Length (See
Requirement No. 3 on page 7.)
Minimum length is 5 ft (1.5M).
Top
View
8. Connect the Concentric Adapter Box to the Heater - Use the pipe
specified and joints required for type of pipe. If collar or opening at the
heater or adapter are different diameters from the pipe (use only diam-
eters allowed on page 7), make joint connection with field-supplied
taper-type reducer or increaser.
A minimum of 12" (305 mm) of straight pipe is required at the venter
outlet.
Due to the high temperature, do not enclose the exhaust pipe or place
pipe closer than 6" (152 mm) to combustible material.
Installation of the horizontal vent and combustion air system on your
separated-combustion unit is complete. Verify that all installation re-
quirements are met. Continue to Paragraph 9.
Inlet Air
Guard
6C First, attach the inlet
air guard;
Second, attach the
exhaust cap
4. Attach the concentric adapter box
to the wall. Insert the vent pipe and com-
bustion air pipe through the wall. Push
the concentric adapter box flush against
the inside wall or attach to the wall with
the field-supplied brackets. Caulk or
flash inlet air pipe on the outside wall.
Flashing is field-supplied.
5. Slide the inlet guard over the end of the vent pipe and position it
on the end of the combustion air pipe. See Figure 6C. Attach the guard
to the inlet air pipe with the four 1/2" lg screws provided.
6. Position the vent cap on the end of the vent pipe. Align the cap so
that its baffle strips are positioned on the horizontal and vertical
centerlines (See Figure 6C). Attach the exhaust cap to the vent pipe
with sheetmetal screws.
IMPORTANT: Install
exhaust cap with baffles
positioned on horizontal
and vertical centerlines as
illustrated.
Flash or caulk the air
inlet pipe
on the
outside
wall.
6B
Position the vent pipe so that it will extend a minimum of 16" past
the end of the combustion air pipe. See Figure 6A. If a reducer is
required, a maximum of 6" (152mm) of vent pipe should extend
out the heater side. Any time the pipe is re-positioned, re-check the
seal to be sure that it has not rolled. Adjust the pipe and seal until
the pipe is the correct length on each side of the box and the seal is
over the edge of the hole and tight to the entire circumference of
the pipe.
3c) Attach the outside portion of the combustion air pipe to the
box. Determine the length by measuring the bracket length (if brack-
ets are used), plus the wall thickness, plus 2" (51 mm). The inlet air
pipe should extend beyond the outside wall approximately 2"
(51mm).
Attach the inlet air pipe to the collar of the concentric adapter with
sheetmetal screws, being careful not to penetrate the vent pipe.
7. Horizontal vent terminal/combustion air inlet Option CC6 is installed
and ready for connection to the heater. Refer to Figure 6D and verify
compliance with all requirements illustrated.