59SU5A: Installation, Start-up, Operating and Service Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
35
Installing the Vent Termination
Roof Terminations
A roof termination of any type will require a 4-in. (102 mm) flashing for
a 2 in. (50 mm ND) concentric vent or a 5-in. diameter (127 mm)
flashing for a 3-in. (80 mm ND) concentric vent kit. For two-pipe or
single pipe vent systems, a flashing for each pipe of the required
diameter will be necessary.
It is recommended that the flashing be installed by a roofer or competent
professional prior to installing the concentric vent. The terminations can
be installed on a flat or pitched roof.
Concentric Vent
Single or multiple concentric vent must be installed (see Fig. 56).
Maintain the required separation distance between vents or pairs of vents
(see Fig. 56) and all clearance (see Fig. 54).
NOTE: Follow the instructions of the vent terminal manufacturer. These
instructions are provided as a reference, only.
Cut one 4-in. (102 mm) diameter hole for 2-in. (50 mm ND) kit, or one
5-in. (127 mm) diameter hole for 3-in. (80 mm ND) kit in the desired
location.
Loosely assemble concentric vent/combustion air termination
components together using instructions in kit.
Slide assembled kit with rain shield REMOVED through hole in wall or
roof flashing.
NOTE: Do not allow insulation or other materials to accumulate inside
of pipe assembly when installing it through hole.
Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
Two-Pipe and Single-Pipe Terminations
Single and two pipe vent must be installed (see Fig. 56 and Fig. 57).
Maintain the required separation distance between vents or pairs of vents
(see Fig. 56 and Fig. 57) and all clearances (see Fig. 54 and Fig. 55).
Cut the required number of holes in the roof or sidewall for vent and
(when used) combustion air pipes. Sidewall holes for two-pipe vent
terminations should be side-by-side, allowing space between the pipes
for the elbows to fit on the pipes.
Holes in the roof for direct-vent two-pipe terminations should be spaced
no more than 18 in. (457 mm) apart to help avoid vent gas recirculation
into combustion air intake.
Termination elbows will be installed after the vent and (if used)
combustion air pipe is installed.
Sidewall Terminations
Concentric Vent
NOTE: Follow the instructions of the vent terminal manufacturer. These
instructions are provided as a reference only.
Determine an appropriate location for termination kit using the
guidelines provided in section “Locating The Vent Termination” in
this instruction.
1. Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. diameter hole
for 3-in. kit.
2. Loosely assemble concentric vent/combustion air termination
components together using instructions in kit.
3. Slide assembled kit with rain shield REMOVED through hole.
NOTE: Do not allow insulation or other materials to accumulate inside
of pipe assembly when installing it through hole.
4. Locate assembly through sidewall with rain shield positioned no
more than 1-in. (25 mm) from wall (see Fig. 56).
5. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
2-Pipe and 1-Pipe Vent Termination
NOTE: Follow the instructions of the vent terminal manufacturer. These
instructions are provided as a reference, only.
Determine an appropriate location for termination kit using the
guidelines provided in section “Locating The Vent Termination” in
this instruction.
1. Cut two holes, one for each pipe, of appropriate size for pipe size
being used.
2. Loosely install elbow in bracket (if used) and place assembly on
combustion-air pipe.
3. Install bracket (see Fig. 56).
NOTE: For applications using vent pipe option indicated by dashed
lines (see Fig. 56 and Fig. 57), rotate vent elbow 90_ from position.
4. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
(Direct Vent / 2-Pipe System ONLY)
When two or more furnaces are vented near each other, two vent
terminations may be installed (see Fig. 56), but next vent termination, or
pair of vent terminations, must be at least 36 in. (914 mm) away from the
first two terminations. It is important that vent terminations be made (see
Fig. 56) to avoid recirculation of vent gases.
A11309A
Representative drawing only, some models may vary.
UPFLOW LEFT CONFIGURATION
NOTICE
!
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that rooftop vent terminations in excess of 36 inches
(1 M) in vertical length be supported by EITHER the Direct Vent
Termination Kit (Table 14) or by field-supplied brackets or supports
fastened to the structure.
NOTICE
!
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that sidewall vent terminations in excess of 24
inches (0.6 M) in vertical length be supported by EITHER the Direct
Vent Termination Kit (Table 14) or by field-supplied brackets or
supports fastened to the structure.
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Rotate vent elbow to
required position.
Any other unused
knockout may be used
for combustion air
connection.
&
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