Materials And Joining Methods; Proper Vent/Flue And Combustion Air Piping Practices; Termination Locations - Amana GUCA Installation Instructions Manual

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.
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
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. Allow-
ances 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.
Avoid breathing
14
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 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

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.
•
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 walk-
ways 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 equip-
ment.
•
The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.