Instruction manual

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fittings meeting ASTM D2665 and ASTM D3311. Carefully
follow the manufacturer’s instructions for cutting, cleaning,
and solvent cementing of PVC.
As an alternative to PVC pipe, primer, solvent cement, and
fittings, ABS materials which are in compliance with the
following specifications may be used. Two-or-three-inch
ABS Schedule 40 pipe must meet ASTM D1527 and, if
used in Canada, must be CSA listed. Solvent cement for
ABS to ABS joints must meet ASTM D2235 and, if used in
Canada, must be CSA listed. The solvent cement for the
PVC to ABS transition joint must meet ASTM D3138.
Fittings must be DWV type fittings meeting ASTM D2661
and ASTM D3311 and, if used in Canada, must be CSA
listed. Carefully follow the manufacturers’ instructions for
cutting, cleaning, and solvent cementing PVC and/or ABS.
All 90° elbows must be medium radius (1/4 bend DWV) or
long radius (Long sweep 1/4 bend DWV) types conforming
to ASTM D3311. A medium radius (1/4 bend DWV) elbow
measures 3 1/16” minimum from the plane of one opening
to the centerline of the other opening for 2” diameter pipe,
and 4 9/16” minimum for 3” pipe.
PROPER VENT/FLUE AND COMBUSTION AIR PIPING
PRACTICES
Adhere to these instructions to ensure safe and proper
furnace performance. The length, diameter, and number
of elbows of the vent/flue pipe and combustion air pipe
(when applicable) affects the performance of the furnace
and must be carefully sized. All piping must be installed in
accordance with local codes and these instructions.
Piping must be adequately secured and supported to
prohibit sagging, joint separation, and/or detachment from
the furnace. Horizontal runs of vent/flue piping must be
supported every three feet and must maintain a 1/4 inch
per foot downward slope, back towards the furnace, to
properly return 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
freezing inside the vent/flue pipe and/or at the vent/flue
pipe termination. All vent/flue piping exposed to freezing
temperatures below 35ºF 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 termi-
nations 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
NOTES: Refer to Section IV, Location Requirements and
Considerations for combustion air contaminant restrictions.
The following bullets and diagram describe the restrictions
concerning the appropriate location of vent/flue pipe and
combustion 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.
WARNING
Upon completion of the furnace installation,
carefully inspect the entire flue system
both inside and outside the furnace to
assure it is properly sealed. Leaks in the
flue system can result in serious personal
injury or death due to exposure to flue
products, including carbon monoxide.
A condensing gas furnace achieves its high level of effi-
ciency by extracting almost all of the heat from the products
of combustion and cooling them to the point where con-
densation takes place. Because of the relatively low flue
gas temperature and water condensation requirements,
PVC pipe is used as venting material.
This furnace must not be connected to Type B, BW, or L
vent or vent connector, and must not be vented into any
portion of a factory built or masonry chimney except when
used as a pathway for PVC as described later in this
section. Never common vent this appliance with another
appliance or use a vent which is used by a solid fuel
appliance. Do not use commercially available “no hub
connectors” other than those shipped with this product.
It is the responsibility of the installer to follow the manufac-
turers’ recommendations and to verify that all vent/flue
piping and connectors are compatible with furnace flue
products. Additionally, it is the responsibility of the installer
to ensure that all piping and connections possess ad-
equate structural integrity and support to prevent flue pipe
separation, shifting, or sagging during furnace operation.
DUAL CERTIFICATION: NON-DIRECT/DIRECT VENT
This furnace is dual certified and may be installed as a non-
direct vent (single pipe) or direct vent (dual pipe) appli-
ance. A non-direct vent installation requires only a vent/
flue pipe, while a direct vent installation requires both a
vent/flue pipe and a combustion air intake pipe. Refer to
the appropriate section for details concerning piping size,
length, number of elbows, furnace connections, and termi-
nations.
MATERIALS AND JOINING METHODS
WARNING
To avoid fire, explosion, or bodily injury,
solvent cements must be kept away from
all ignition sources (i.e., sparks, open
flames, and excessive heat) as they are
combustible liquids. Avoid breathing
cement vapors or contact with skin and/or
eyes.
Two- or three-inch nominal diameter PVC Schedule 40
pipe meeting ASTM D1785, PVC primer meeting ASTM
F656, and PVC solvent cement meeting ASTM D2564
specifications must be used. Fittings must be DWV type