SYSTEM OPERATION
20
Combustion Air Intake may also be snorkeled to obtain 12” min ground clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
Figure 17
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3”-24” BETWEEN PIPES
If the combustion air intake pipe is to be installed above a
finished ceiling or other area where dripping of condensate
will be objectionable, insulation of the combustion air pipe may
be required. Use ½” thick closed cell foam insulation such as
Armaflex™ or Insultube™ where required.
VENT/FLUE AND COMBUSTION AIR PIPE TERMINA-
TIONS
Termination of Multiple Direct Vent Furnaces
Figure 18
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
3”MIN
24”MAX
12” MIN SEPARATION
The vent/flue and combustion air pipes may terminate verti
-
cally, as through a roof, or horizontally, as through an outside
wall.
VENT/INTAKE TERMINATIONS FOR INSTALLATION
OF MULTIPLE DIRECT VENT FURNACES
If more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum
clearances between the exhaust vent and air intake termina
-
tions 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 horizon
-
tally 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.
CONCENTRIC VENT TERMINATION
Refer to the directions provided with the Concentric Vent Kit
(DCVK) for installation specifications.
Side Wall Vent Kit
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 0170K00001S) for installation
specifications.
Ve rtica l Insta llation
H orizontal Installation
Side Wall Vent Kit
Figure 19
#
3
#1
#2
#4
#5
#
6
#7
#8
#9
#10
#11
100 Degree
Elbow
Coupling
Figure 20
NOTE:
Drain components shown for information purposes only.
CONDENSATE DRAIN LINES & DRAIN TRAP
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. 0The condensate must be
collected in the furnace drain trap and routed to an appropriate
drain location in compliance with local and national codes.
