Installation Instructions

13
service personnel. All fire stops and roof flashings used with
this system must be UL listed. Acceptability under CAN/CSA
B149.1-15 is dependent upon full compliance with all instal-
lation instructions. Consult the authority having jurisdic-
tion (gas inspection authority, municipal building depart-
ment, fire department, etc.) before installation to deter-
mine the need to obtain a permit. *IPEX System 636™ is a
trademark of IPEX Inc. Carefully follow the pipe manufac-
turers’ instructions for cutting, cleaning, and solvent ce-
menting PVC and/or ABS. The vent can be run through an
existing unused chimney provided the space between the
vent pipe and the chimney is insulated and closed with a
weather-tight, corrosion-resistant flashing.
STANDARD FURNACE CONNECTIONS
It is the responsibility of the installer to ensure that the piping
connections to the furnace are secure, airtight, and adequately
supported.
VENT/FLUE P IPE
The vent pipe outlet is sized to accept 2” pipe. Secure vent/
flue pipe directly into the furnace fitting with the appropriate
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 refriger-
ant lines, metering devices, condensate drain lines, etc. If
necessary, clearances may be increased by creating an offset
using two 45 degree elbows. This joint can be rotated on the
fitting to establish maximum clearance between 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
Increased Clearance Configuration
Figure 8A
NOTE: 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 upflow 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 cou-
pling 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 counterflow units secure the com-
bustion air intake pipe to the air intake coupling using the rubber
coupling and worm gear hose clamps provided with the unit. The
counterflow rubber coupling allows service removal of air intake
piping internal to the furnace blower compartment. The com-
bustion air intake pipe can also be secured directly to the
counterflow unit air intake pipe coupling.
COMBUSTION AIR INTAKE OPTIONS: The RF000142 coupling
can be secured directly to the furnace intake coupling if con-
densation is a concern. If the RF000142 is used on the com-
bustion 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 on the RF000142
coupling. It must have a field supplied, trapped drain tube
free-draining to proper condensate disposal location. A loop
in the drain tube can serve as a trap. The unused RF000142
drain fitting should be capped. (Figure 8B) A tee installed in
the intake pipe is also an acceptable method of catching
condensation. It must have a field supplied, trapped drain
tube or pipe, free-draining to proper condensate disposal
location. A loop in the drain tube can serve as a trap.
VENT-DRAIN
The RF000142 Coupling
Figure 8B
NON-DIRECT VENT INSTALLATIONS
A minimum of one 90° elbow should be installed on the combus-
tion air intake “coupling” to guard against inadvertent block-
age.
ALTERNATE VENT/FLUE LOCATION
On upflow models, the alternate vent/flue location is the large
hole directly in line with the induced draft blower outlet. To use
the alternate vent/flue location refer to the following steps and
the “Alternate Vent/Flue Location” figure.