18
penetration is required for 2” diameter pipe while a 3 1/2 inch diam-
eter hole is required for 3” diameter pipe. To secure the pipe pass-
ing through the wall and prohibit damage to piping connections, a
coupling should be installed on either side of the wall and solvent
cemented to a pipe connecting the two couplings. The pipe length
should be the wall thickness plus the depth of the socket fittings to
be installed on the inside and outside of the wall. The wall penetra-
tion should be sealed with silicone caulking material.
12" MIN
3" MIN
24" MAX
3" MIN
24" MAX
Standard Horizontal Terminations (Dual Pipe)
24" MAX
3" MIN
24" MAX
AIR
INTAKE
90°
MEDIUM
RADIUS
ELBOW
Alternate Horizontal Vent Termination (Dual Pipe)
SUPPORT
STRAPS
90°
MEDIUM
RADIUS
ELBOWS
12" MIN.
VENT/FLUE
TEE
SCREEN
COMBUSTION
AIR INTAKE.
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3" MIN.
24" MAX.
12" M IN
Standard Horizontal Terminations Above Anticipated Snow
Level (Dual Pipe)
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
In a basement installation, the pipes may be run between the joist
spaces. If the pipes must go below the joist and then up into the last
joist space to penetrate the header, two 45° elbows should be used
to reach the header rather than two 90° elbows.
V
ENT
/I
NTAKE
T
ERMINATIONS
F
OR
I
NSTALLATION
OF
M
ULTIPLE
D
IRECT
V
ENT
F
URNACES
If more than one direct vent furnace is to be installed vertically through
a common roof top, maintain the same minimum clearances be-
tween 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 horizontally
through a common side wall, maintain the clearances as in the fol-
lowing figure. Always terminate all exhaust vent outlets at the same
elevation and always terminate all air intakes at the same elevation.
Vents
24" Max.
3" Min.
Screen
24" Max.
90°
Medium
Radius
Elbows
24" Max.
3" Min.
3" Min.
Horizontal Venting Of Multiple Units
C
ONCENTRIC
V
ENT
T
ERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK)
for installation specifications.
X. CO
X. CO
X. CO
X. CO
X. COND
ND
ND
ND
NDENSA
ENSA
ENSA
ENSA
ENSATE DRAIN LINES & DRAIN TRAP
TE DRAIN LINES & DRAIN TRAP
TE DRAIN LINES & DRAIN TRAP
TE DRAIN LINES & DRAIN TRAP
TE DRAIN LINES & DRAIN TRAP
G
ENERAL
A condensing gas furnace achieves its high level of efficiency by
extracting almost all of the heat from the products of combustion
and cooling them to the point where condensation takes place. The
condensate which is generated must be piped to an appropriate
drain location.
In
upright
installations, the furnace’s drain hoses may exit either the
right or left side of the furnace.
NOTE:
If the alternate vent/flue
outlet is utilized in an upright installation, the drain trap and drain
connections must be located on the same side as the alternate
vent/flue outlet.
In
horizontal
installations, the drain hoses will exit through the bot-
tom (down side) of the unit with the drain trap suspended beneath
the furnace. The field-supplied drain system must be in accordance
with all local codes and the instructions in the following sections.
