GMES96-U Installation Manual
14
installation uses the standard intake location, or a horizontal
installation uses the alternate air intake location. This elbow will
guard against inadvertent blockage of the air intake.
VENT/FLUE PIPE LENGTHS AND DIAMETERS
Refer to the Direct and Non-Direct Vent Table 3 for applicable
length, elbows, and pipe diameter for construction of the
vent/flue pipe system of a non-direct vent installation. In
addition to the vent/flue pipe, a single 90° elbow should be
secured to the combustion air intake to prevent inadvertent
blockage. The tee used in the vent/flue termination must be
included when determining the number of elbows in the piping
system.
MAXIMUM ALLOWABLE VENT LENGTH OF VENT/FLUE PIPE &
COMBUSTION AIR PIPE (Ft)
12345678
2 9590858075706560
3 103 96 89 82 75 68 61 5 4
2 9085807570656055
3 158 1 51 144 1 37 130 123 116 109
2 5550454035302520
3 151 1 44 13 7 130 12 3 116 1 09 10 2
* M ES960403BU
* M ES960603BU
* M ES960805C U
MODEL Pipe Size (in)
Number of Elbows
Table 3
VENT/FLUE PIPE TERMINATIONS
NOTE: If either a 90°or 45°elbow is used for termination, it
must be pointed downward.
The vent/flue pipe may terminate vertically, as through a roof,
or horizontally, as through an outside wall.
Vertical vent/flue pipe terminations should be as shown in figure
12. Refer to Vent/Flue Pipe and Combustion Air Pipe - Termina-
tion Locations for details concerning location restrictions. The
penetration of the vent through the roof must be sealed tight
with proper flashing such as is used with a plastic plumbing vent.
Horizontal vent/flue pipe terminations should be as shown in the
following figure. Refer to Vent/Flue Pipe and Combustion Air
Pipe. To secure the pipe passing 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 length of pipe
connecting the two couplings. The length of pipe 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 penetration
should be sealed with silicone caulking material.
NOTE: Terminate both pipes in the same pressure zone
(same side of roof, no major obstacles between pipes,
etc.).
A heat pump thermostat with two stages of heat is required
to properly use a furnace in conjunction with a heat pump.
Refer to the fossil fuel kit installation instructions for addi-
tional thermostat requirements.