Install Instructions

12
Figure 5
NO TRANSITION ON
HORIZONTAL PLANE,
THIS CREATES A
WATER TRAP AND
RESTRICTS FLUE
GASES
Figure 6
Some models require the use of 3” pipe. Do not transition
from a 2” to 3” pipe in a horizontal section of pipe as this
may create a water trap.
Piping must be adequately secured and supported to prohibit
sagging, joint separation, and/or detachment from the fur-
nace. Horizontal runs of vent/flue piping must be supported
every three to five feet and must maintain a 1/4 inch per foot
downward slope, back towards the furnace, to properly re-
turn condensate to the furnace’s drain system. Allowances
should be made for minor expansion and contraction due to
temperature variations. For this reason, particular care must
be taken to secure piping when a long run is followed by a
short offset of less than 40 inches.
Precautions should be taken to prevent condensate from freez-
ing inside the vent/flue pipe and/or at the vent/flue pipe
termination. All vent/flue piping exposed to freezing tem-
peratures below 35°F for extended periods of time must be
insulated with 1/2” thick closed cell foam. Also all vent/flue
piping exposed outdoors in excess of the terminations shown
in this manual (or in unheated areas) must be insulated with
1/2” thick closed cell foam. Inspect piping for leaks prior to
installing insulation.
TERMINATION LOCATIONS
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level
Vent Clearances
Figure 7
NOTE: Refer to Location Requirements and Considerations for
combustion air contaminant restrictions.
The following bullets and diagram describe the restrictions con-
cerning the appropriate location of vent/flue pipe and combus-
tion air intake pipe (when applicable) terminations. Refer to
Non-Direct Vent (Single Pipe) Piping and Direct Vent (Dual Pipe)
Piping located in this section for specific details on termination
construction.
• All terminations (flue and/or intake) must be located
at least 12 inches above ground level or the anticipated
snow level.
• Vent terminations (non-direct and direct vent) must
terminate at least 3 feet above any forced air inlet
located within 10 feet.
NOTE: This provision does not apply to the combustion
air intake termination of a direct vent application.
• The vent termination of a non-direct vent application
must terminate at least 4 feet below, 4 feet horizontally
from, or 1 foot above any door, window, or gravity air
inlet into any building.
• The vent termination of a direct vent application must
terminate at least 12 inches from any opening through
which flue gases may enter a building (door, window, or
gravity air inlet).
• The vent termination of vent pipe run vertically through
a roof must terminate at least 12 inches above the
roof line (or the anticipated snow level) and be at least
12 inches from any vertical wall (including any
anticipated snow build up).
• A vent termination shall not terminate over public
walkways or over an area where condensate or vapor
could create a nuisance or hazard or could be detrimental
to the operation of regulators, relief valves, or other
equipment.
• The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.
NOTE: In Canada, the current edition of CAN/CSA B149.1-
15 takes precedence over the preceding termination
description.
CANADIAN VENT PIPE & COMBUSTION AIR PIPE REQUIREMENTS
All installations in Canada must conform to the require-
ments of CAN/CSA B149.1-15 code. All vent components,
including primer and cement, must be listed to ULC S636.
The certified pipe and fittings should be clearly marked
with the ULC standard “S636”. The primer and cement
used must be of the same manufacturer as the vent sys-
tem. 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 combus-
tion air pipe only. ABS is not an approved vent material in