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standard “S636”. The primer and cement used must be of
the same manufacturer as the vent system. For Royal Pipe
System 636, use GVS-65 Primer (Purple) and GVS-65 PVC
Solvent Cement. For IPEX System 636, use PVC/CPVC
Primer, Purple or clear. Use PVC Solvent Cement (Gray).
For Canadian installations, ABS may be used as a
combustion air pipe only. ABS is not an approved vent
material in Canada.
If ABS is used as a combustion air pipe, it must be CSA
certified. Always follow the manufacturer’s instructions in the
use of primer and cement. Do not use primer and cement
around potential sources of ignition. Do not use primer or
cement beyond its expiration date.
The safe operation, as defined by ULC S636, of the vent
system is based on following these installation instructions,
the vent system manufacturer’s installation instructions,
and proper use of primer and cement. It is recommended
under this standard, that the vent system be checked once
a year by qualified 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 installation instructions. Consult
the authority having jurisdiction (gas inspection authority,
municipal building department, fire department, etc.) before
installation to determine the need to obtain a permit.
*IPEX
System 636™ is a trademark of IPEX Inc
.
Carefully follow the pipe manufacturers’ instructions for
cutting, cleaning, and solvent cementing 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 Pipe
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
refrigerant 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
ELBOWS
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
WARNING
Be sure not to damage internal wiring or other components
when reinstalling coupling and screws.
WARNING
The rubber elbow is not designed to support a load. When
the rubber elbow is mounted externally to the furnace
cabinet, extreme care must be taken to adequately support
field-supplied vent/flue piping, as damage can result in leaks
causing bodily injury or death due to exposure to flue gases
including carbon monoxide.
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 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
counterflow
units secure the
combustion 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 combustion air intake pipe can also
be secured directly to the counterflow unit air intake pipe
coupling.
