14
secure flange to cabinet.
8. Connect drain hose to the uncapped port on the
RF000142 coupling, refer to page 19, Section entitled
“Horizontal Installation with Left Side Down - Alternate”
for drain connection details.
When using the alternate venting location, either in a
horizontal left side down installation or a vertical installation
using down – venting, the alternate combustion air opening
can be used. A locating dimple is located on the right side of
the furnace cabinet. The locating dimple is 1-7/8” measured
from the front edge of the cabinet in line with the knock out.
To use the alternate combustion air location:
1. Remove screws and combustion air flange and gasket
from cabinet.
2. Insert the 3” cabinet plug from the drain bag assembly
in the unused combustion air hole.
3. Drill a pilot hole at the cabinet dimple (size dictated by
knockout tool used).
4. Use a knockout tool to create a 3” diameter hole.
5. Secure the combustion air flange and gasket to the
furnace cabinet using the self-tapping screws removed
in step 1.
Pipe Termination
Products of combustion must always be vented outside. A
vent pipe must never terminate in an attic, crawl space, or
any other part of a dwelling. Follow the vent pipe & intake
pipe termination requirements listed below as well as all
applicable local, State and National codes.
All terminations (vent and/or intake) must be located at least
12” above ground level or the anticipated snow level.
All vent terminations (non-direct and direct vent) must
terminate at least 3 feet above any forced air inlet located
within 10 feet.
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” 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” above the roof line (or the
anticipated snow level) and be at least 12” 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.
Vent & combustion air pipes may terminate vertically
through a roof, or horizontally through an outside wall. The
combustion air intake and vent pipe terminations must be
in the same atmospheric pressure zone. Vertical vent pipe
terminations should be as shown in figure 14. The penetration
of pipes through the roof must be sealed water tight with
proper flashing such as is used with a plastic plumbing vent.
Horizontal vent pipe terminations should be as shown in the
following figures. 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.
12"
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
12"
min.
4'
min.
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
<10'
Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level
3' min.
12" min.
4' min.
12" min.
Vent Termination Clearances
Figure 12
