Goodman GMPN Installation & Operating Instructions Manual page 8

DO NOT install the vent pipe in the same chase with the vent from another fuel burning appliance,
except with a GMN, GMPN, GSUS, or GSU furnace manufactured by GOODMAN.
DO NOT install the vent pipe within six (6) inches of another fuel burning appliance.
The drain trap must be easily accessible for checking and / or cleaning. It must be mounted as
shown elsewhere in this I&O.
DO NOT install the trap higher than the venter blower outlet.
DO NOT install this appliance in any area where freezing may occur without properly protecting
the drain assembly.
DO NOT terminate the vent under a deck or overhang or where a positive pressure or the
recirculation of vent products may occur.
CONSULT LOCAL CODES FOR SPECIAL ADDITIONAL REQUIREMENTS.
THE COMBUSTION PRODUCTS AND MOISTURE IN THE FLUE GASES WILL CONDENSE.
THE CONDENSATE MAY FREEZE ON THE EXTERIOR WALL AND SURROUNDING
SURFACES. SOME DISCOLORATION OR ETCHING IS TO BE EXPECTED.
When selecting which exterior wall to penetrate the following items should be taken into
consideration:
Layout the vent system to avoid the possibility of interference with beams, poles, posts, electrical
wiring, plumbing , etc.
When possible the vent termination should not be subjected to prevailing winds.
The vent termination must be located at least twelve (12) inches above grade or expected snow
depth. Consideration should be given to past unusual snow falls.
• DO NOT locate the terminal less than seven (7) feet above public walkways or where it could
cause a nuisance or hazard. This also applies to steps and stairwells.
• DO NOT locate the termination where condensate may present a problem such as flower
beds, patios, etc.
• DO NOT locate within four (4) feet of a gas or electric meter or gas regulator.
• DO NOT locate the vent terminal within four (4) feet between buildings.
• DO NOT locate the vent terminal less than twelve (12) inches above a door or an operable
window.
• DO NOT locate the vent terminal less than four (4) feet below OR four (4) feet horizontally
from, any door, window, or gravity air inlet into any building.
• DO NOT locate the vent terminal within three (3) feet of an inside corner of a building or
structure. A minor inside corner formed by a masonry chimney is an exception to this
requirement.
To protect the exterior surface from staining due to the condensate an aluminum plate or similar
material may be installed surrounding the termination. This plate should extend approximately two
(2) feet from the penetration.
The area surrounding the vent pipe must be kept free of snow, trash, bushes or any other
obstacle which may cause a blockage. A blockage can cause CARBON MONOXIDE to enter the
building.
SUPPORTING AND PITCHING THE VENT
All horizontal runs must be supported at least every five (5) feet and at joints with straps or
hangers. No sags or dips are permitted. The pipe must be saddle supported only. Do not secure
the hangers or straps tightly to the pipes, allow for expansion and contraction of the vent pipe
material. Maintain a 1/4 " per foot minimum pitch upward on the horizontal vent pipe from the
IO-151
CAUTION
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