Goodman GMEC96 Service Instructions Manual page 20

INSTALLATION CONSIDERATIONS
V /I T
ENT NTAKE ERMINATIONS
D V F
TIPLE IRECT ENT URNACES
If more than one direct vent furnace is to be installed verti-
cally through a common roof top, maintain the same mini-
mum clearances between the exhaust vent and air intake
terminations of adjacent units as with the exhaust vent and
air intake terminations of a single unit.
If more than one direct vent furnace is to be installed hori-
zontally through a common side wall, maintain the clear-
ances as in the following figure. Always terminate all ex-
haust vent outlets at the same elevation and always termi-
nate all air intakes at the same elevation.
3" MIN
OPTIONAL
INTAKE
SCREENS
12" MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
Termination of Multiple Direct Vent Furnaces
9 "
1 2 "
D ir e c t V e n t
T e r m in a l
5 0 ,0 0 0 B t u h
o r le s s
(DCVK) Vent Termination Clearances
1. The vent termination must be located at least 12" above
ground or normally expected snow accumulation levels.
20
F I M
OR NSTALLATION OF
3" - 24"
12" MIN SEPARATION
3 '
1 2 "
1 2 "
F o rc e d A ir I n le t
D ir e c t V e n t T e r m in a l
M o r e th a n 5 0 , 0 0 0 B tu h
FIGURE 1
-
UL
2. 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.
3. The vent termination shall be located at least 4'
horizontally from any electric meter, gas meter,
regulator and any relief equipment. These distances
apply ONLY to U.S. Installations.
4. The vent termination shall 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.
5. In Canada, the Canadian Fuel Gas Code takes
precedence over the preceding termination instructions.
Y Concentric Fitting
These kits are for vertical or horizontal termination of the
combustion air inlet and the exhaust vent pipes on Category
IV gas-fired condensing furnaces. The DCVK-30 (CVENT-
3) kit can be used for 3" diameter pipe systems. The DCVK-
20 (CVENT-2) kit can be used for the 2" diameter pipe
system. 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.
1. Determine the best location for the termination kit. Roof
termination is preferred since it is less susceptible to
damage, has reduced intake contaminants and less
visible vent vapors. For side termination, consideration
should be given to:
a. Possible damage from the vapors to plants/shurbs,
other equipment and building materials
b. Possible damage to the terminal from foreign ob-
jects
c. Wind effects that may cause recirculation of flue
products, debris or light snow
d. Visible vent vapors.
2 or 2 1/2" Diameter
3" or 4" Diameter
SDR-26 Pipe
SDR-26 Pipe
2" or 3" Diameter
Rain Cap
2" or 3" Diameter