GMEC96 Installation Manual

15

It is the responsibility of the installer to ensure that the piping
connections to the furnace are secure, airtight, and adequately
supported.

The vent pipe outlet is sized to accept 2” pipe. Secure vent/

glue. Alternately, a small section of 2” pipe may be glued
in the furnace socket and a rubber coupling installed to
allow removal for future service. Combustion Air and Vent
piping should be routed in a manner to avoid contact with
refrigerant lines, metering devices, condensate drain lines,
etc. If necessary, clearances may be increased by creating
-

refrigerant lines, metering devices, and condensate drain
lines, etc. This joint is the equivalent of one 90 deg. elbow
when considering elbow count. (Figure 8A)
45 DEGREE
LONG-SWEEP
ELBOWS
V
E
N
T

Figure 8A
For non-direct vent installations, a minimum of one
90° elbow should be installed on the combustion air intake
coupling to guard against inadvertent blockage.
Direct Vent installations
E
DGES
OF
SHEET
METAL
HOLES
MAY
BE
SHARP
. U
SE
GLOVES
AS
A
PRECAUTION
WHEN
REMOVING
HOLE
PLUGS
.
WARNING
On upow units secure the combustion air intake pipe to
the air intake coupling by using a take apart rubber coupling
supplied with the furnace or a plastic coupling. Also, the
intake coupling may be inverted to allow the intake pipe to
be glued directly to it. After inverting the coupling, secure
it to the furnace top with screws. On counterow units
secure the combustion air intake pipe to the air intake cou-
pling using the rubber coupling and worm gear hose clamps
 
allows service removal of air intake piping internal to the
furnace blower compartment. The combustion air intake

air intake pipe coupling.
COMBUSTION AIR INTAKE OPTIONS: The RF000142 coupling
can be secured directly to the furnace intake coupling if
condensation is a concern. If the RF000142 is used on the
combustion air inlet, it must be installed with the arrow
pointing up. It should be noted, the combustion air will
actually be moving in a direction opposite of the arrow

trapped drain tube free-draining to proper condensate
disposal location. A loop in the drain tube can serve as a

(Figure 8B) A tee installed in the intake pipe is also an ac-
ceptable method of catching condensation. It must have

to proper condensate disposal location. A loop in the drain
tube can serve as a trap.
Combustion Air
Exhaust
Tee Installation in Intake Pipe
Figure 8B
VENT-DRAIN
The RF000142 Coupling
Figure 8C