11. Concentric Termination
VentTermination Clearances
Poison carbon monoxide gas, fire and explo-
sion hazard.
Inlet and outlet pipes may NOT be vented
directly above each other (standard vent
terminals).
Failure to properly vent this furnace can result in
death, personal injury and/or property damage.
1. Determinetermination locations based on clearances spe-
cified in following steps and as shown in Figure 7,
Figure 42 through Figure 47,
2. The vent termination must be located at least 12" above
ground or normally expected snow accumulation levels.
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.
The venttermination 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.
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 prece-
dence over the preceding termination instructions.
ConcentricVentTermination- 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" di-
ameter pipe systems. The NAHA002CV kit can be used for 2"
diameter pipe system. Refer to Table 10 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.
Kit Contents:
Kit Components
3" Rain Cap or 2" Rain Cap
3" Diameter SDR-26 Pipe, 191/2" Long or
4" Diameter SDR-26 Pipe, 371/8" Long,
2" Diameter SDR-26 Pipe, 315/8" Long or
21/2" Diameter SDR-26 Pipe, 24" Long,
3" Y Concentric Fitting or 2" Y Concentric Fitting
3" or 4" Dia.
SDR-26 Pipe
2" or 3" Dia. 2 or 21/2" Dia.
Y Concentric Fitting SDR-26 Pipe
2" or 3" Dia.
Rain Cap
25-22-03
Vertical & Horizontal Termination
1.
2.
Determine the pipe diameters required for the installation
from Table 10 and Figure 44.
Determine the best location for the termination kit. See
Figure 43 for vertical termination or Figure43 and
Figure 47 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) visible vent vapor.
Concentric Vent Roof Installation
Vent!_ Maintain 12" rain. clearance
U
above highest anticipated
snow level. Max. of 24"
above roof.
Combustion
Air
Roof Boot/
Flashing
(Field
Support
(Field Supplied)
j45 Elbow
(Field Supplied)
Vent
Combustion
Air 25-22-02
Note:
Support must be field installed to secure termination kitto structure.
3. Cut one 5" diameter hole through the structure for the
NAHA001CV Kit or one 4" diameter hole for the
NAHA002CV Kit.
[_ 440 01 101004
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