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440 01 2020 01
11. Concentric Vent Termination
Vent Termination Clearances
CARBON MONOXIDE POISONING, FIRE AND EXPLO-
SION HAZARD.
Failure to properly vent this furnace can result in death,
personal injury and/or property damage.
Inlet and outlet pipes may NOT be vented directly above
each other (standard vent terminals).
!
1. Determine termination locations based on clearances spe-
cified in following steps and as shown in
Figure 7,
Figure 45
through
Figure 50.
2. The vent termination must be located at least 12
²
above
ground or normally expected snow accumulation 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 fog-
ging.
4. The vent termination shall be located at least 4
¢
horizontally
from any electric meter, gas 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
¢
above any
forced air inlet located within 10
¢
; and at least 10
¢
from a
combustion air intake of another appliance, except another
direct vent furnace intake.
6. In Canada, the
Canadian Fuel Gas Code
takes precedence
over the preceding termination instructions.
Concentric Vent Termination - Kit #
NAHA001CV & NAHA002CV
These kits are for vertical or horizontal termination of the combus-
tion air inlet and the exhaust vent pipes on Category
IV
gas--fired
condensing furnaces. The NAHA001CV kit can be used for 3
²
di-
ameter pipe systems. The NAHA002CV kit can be used for 2
²
di-
ameter pipe system. Refer to
Table 9
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.
2 or 2
1
/
2
²
Dia.
SDR--26 Pipe
Kit Components
Kit Contents:
3
²
Rain Cap or 2
²
Rain Cap
3
²
Diameter SDR--26 Pipe, 19
1
/
2
²
Long or
4
²
Diameter SDR--26 Pipe, 37
1
/
8
²
Long,
2
²
Diameter SDR--26 Pipe, 31
5
/
8
²
Long or
2
1
/
2
²
Diameter SDR--26 Pipe, 24
²
Long,
3
²
Y Concentric Fitting or 2
²
Y Concentric Fitting
2
²
or 3
²
Dia.
Rain Cap
3
²
or 4
²
Dia.
SDR--26 Pipe
2
²
or 3
²
Dia.
Y Concentric Fitting
25--22--03
Figure 45
Vertical & Horizontal Termination
1. Determine the pipe diameters required for the installation
from
Table 9
and
Figure 47.
2. Determine the best location for the termination kit. See
Figure 46
for vertical termination or
Figure 46
and
Figure 50
for horizontal termination. Roof termination is
preferred since it is less susceptible to damage, has re-
duced intake contaminants and less visible vent vapor. For
side wall termination, consideration should be given to: 1)
possible damage from the vapors to plants/shrubs, other
equipment and building materials, 2) possible damage to the
terminal from foreign objects, 3) wind effects that may cause
recirculation of flue products, debris or light snow and 4) vis-
ible vent vapor.
Maintain 12
²
min. clearance
above highest anticipated
snow level. Max. of 24
²
above roof.
Combustion
Air
Roof Boot/
Flashing
(Field Supplied)
Combustion
Air
Vent
Concentric Vent Roof Installation
Vent
Support
(Field Supplied)
45
°
Elbow
(Field Supplied)
25--22--02
Note:
Support must be field installed to secure termination kit to structure.
Figure 46
3. Cut one 5
²
diameter hole through the structure for the
NAHA001CV Kit or one 4
²
diameter
hole for the
NAHA002CV Kit .
Содержание 9MPT050F12A
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