23
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 clear-
ances 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 horizontally
through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.
C
ONCENTRIC
V
ENT
T
ERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK)
for installation specifications.
S
IDE
W
ALL
V
ENT
K
IT
This kit is to be used with 2” or 3” direct vent systems. The vent kit must
terminate outside the structure and may be installed with the intake and
exhaust pipes located side-by-side or with one pipe above the other. These
kits are
NOT
intended for use with single pipe (indirect vent) installations.
Refer to the directions furnished with the Side Wall Vent Kit (p/n
0170K00000S or 0170K000001S) for installation specifications.
C
ONDENSATE
D
RAIN
L
INES
& D
RAIN
T
RAP
A condensing gas furnace achieves its high level of efficiency by extracting
heat from the products of combustion to the point where condensation takes place. The condensate must be collected in the
furnace drain trap and routed to an appropriate drain location in compliance with local and national codes.
Follow the bullets listed below when installing the drain system. Refer to the following sections for specific details concerning furnace
drain trap installation and drain hose hook ups.
•
The drain trap supplied with the furnace must be used.
•
The drain trap must be primed at time of installation.
•
The drain line between furnace and drain location must meet local and nation codes.
•
The drain line between furnace and drain location must maintain a 1/4 inch per foot downward slope toward the drain.
•
Do not trap the drain line in any other location than at the drain trap supplied with the furnace.
•
If the drain line is routed through an area which may see temperatures near or below freezing, precautions must be
taken to prevent condensate from freezing within the drain line.
•
If an air conditioning coil is installed with the furnace, a common drain may be used. An open tee must be installed in
the drain line, near the cooling coil, to relieve positive air pressure from the coil’s plenum. This is necessary to prohibit
any interference with the function of the furnace’s drain trap.
G
ENERAL
D
RAIN
I
NFORMATION
All furnace models come with a factory installed drain trap. For vertical installations, the trap will remain in the factory
position except for a counterflow when the installer desires the drain to exit the right side. All furnace models installed
horizontally require the trap to be relocated. Many drain hoses have a built–in grommet which will provide a cabinet seal when
Ve rtica l Installation
H orizontal Ins tallation
Side Wall Vent Kit
Figure 20
Termination of Multiple Direct Vent Furnaces
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
3”MIN
24”MAX
12” MIN SEPARATION
Figure 19
