GMES96-U Installation Manual

17
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 clear-
ances between the exhaust vent and air intake terminations of
adjacent units as with the exhaust vent and air intake termina-
tions 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.
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
10”MIN
24”MAX
12” MIN SEPARATION
Termination of Multiple Direct Vent Furnaces
Figure 18
CONCENTRIC VENT TERMINATION
Refer to the directions provided with the Concentric Vent Kit
(DCVK) for installation specifications.
Vertical Installation
Horizontal Installation
Allowable Installation Orentation
Side Wall Vent Kit
Figure 19
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 in-
stalled 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 (non-direct vent) installations.
Refer to the directions furnished with the Side Wall Vent Kit
(p/n 0170K00000S or 0170K00001S) for installation speci-
fications.
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 col-
lected in the furnace drain trap and routed to an appropri-
ate 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" 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.
NOTE: In vertical installations, air conditioning coil conden-
sate may drain into the furnace trap as long as there is a
trap between the coil and the furnace trap and the drain
pipe is not terminating below the water level of the furnace
trap.