30
CONCENTRIC TERMINATION
Vent Termination Clearances
CARBON MONOXIDE POISONING, FIRE AND
EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Inlet and outlet pipes may NOT be vented directly above each
other (standard vent terminals).
!
WARNING
1. Determine termination locations based on clearances spe-
cified in following steps and as shown in Fig. 7, Fig. 28
through Fig. 33.
2. The vent termination must be located at least 12″ (304.8
mm) above ground or normally expected snow accumula-
tion levels.
3. Do NOT terminate over public walkways. Avoid areas
where condensate may cause problems such as above
planters, patios, or adjacent to windows where steam may
cause fogging.
4. The v ent termination shall be located at least 4′ (1.2 M)ho-
rizontally from any electric meter, g as meter, gas regulator,
and any relief equipment. These distances apply ONLY to
U.S. installations.
5. The vent termination is to be located at least 3′ (.91 M)
above any forced air inlet located within 10′ (3.1 M); (3.1
M) and at least 10′ (3.1 M) from a combustion air intake of
another appliance, except another direct vent furnace in-
take.
6. In Canada, the Canadian Fuel Gas Code takes precedence
over the preceding termination instructions.
Concentric Ve nt Termination - Kit #
KGAVT0601CVT & KGAVT051CVT
These kits are for vertical or horizontal termination of the
combustion air inlet and the exhaust vent p ipes on Category IV
gas-- fired condensing furnaces. The KGAVT0601CVT kit can be
used for 3 ″ diameter pipe systems. The KGAVT0501CVT kit can
be used for 2″ diameter pipe system. Refer to Table 4 for the
correct pipe size for the furnace. Both the combustion air inlet
and the exhaust vent pipes must attach to the termination kit. The
termination kit must terminate outside the structure and must be
installed per the instructions outlined below for vertical or
horizontal termination. Vertical termination is preferred. Field
supplied pipe and fittings are required to complete the
installation.
Vertical & Horizontal Termination
1. Determine the pipe diameters required for the installation
from Table 4 and Fig. 30.
2. Determine the best location for the termination k it. See
Fig. 29 for vertical termination or Fig. 33 for horizontal
termination. Roof termination is preferred since it is less
susceptible to damage, has reduced intake contaminants
and less visible vent vapor. For side wall termination, con-
sideration should be given to: 1) possible damage from the
vapors to plants/shrubs, other equipment and building ma-
terials, 2) possible damage to the terminal from foreign ob-
jects, 3) wind effects that may cause recirculation of flue
products, debris o r light snow and 4) visible vent vapor.
3. Cut one 5″ diameter hole through the structure for the
KGAVT0601CVT Kit or one 4″ diameter hole for the
KGAVT0501CVT Kit .
2or2
1
/
2
″
Dia.
SDR- 26 Pipe
2
or 3
Dia.
Rain Cap
Nominal 3
or 4
Dia.
SDR- 26 Pipe
2
or 3
Dia.
Y Concentric Fitting
Kit Contents:
3″ Rain Cap or 2″ Rain Cap
3″ Diameter SDR--26 Pipe, 19
1
/
2
″ Long or
4″ Diameter SDR--26 Pipe, 24″ Long,
2″ Diameter SDR--26 Pipe, 31
5
/
8
″ Long or
2
1
/
2
″ Diameter SDR--26 Pipe, 37
1
/
8
″ Long,
3″ Y Concentric Fitting or 2 ″ Y Concentric Fitting
A07719
Fig. 28 -- Kit Components
Vent
Maintain 12″
min. clearance above
highest anticipated snow level. Max.
of 24
above roof.
Combustion
Air
Roof Boot/
Flashing
(Field Supplied)
Combustion
Air
Vent
Support
(Field Supplied)
45
Elbow
(Field Supplied)
Note:
Support must be field installed to secure termination kit to structure.
A07720
Fig. 29 -- Concentric Vent Roof Installation
4. Dimension D may be lengthened to 60″ (1524 mm) max.
or shortened by cutting the pipes to 1 2″ (304.8 mm) min.
Dimension A will change according to D dimension. (See
Fig. 30).
5. Partially assemble the concentric vent termination kit.
Clean and cement the parts u sing the procedures for Join-
ing Pipe and Fittings section of the manual. A) Cement the
Y Concentric fitting to the longest of the two straight kit
pipes. (See Fig. 28) B) Cement the rain cap to the shortest
of the straight kit parts. (See Fig. 28).
NOTE: A field supplied stainless steel screw may be used to
secure the rain cap to the pipe instead of cementing when field
disassembly is desired for cleaning (See Fig. 31).
PG9YAA
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