IO-213D
2/04
8
downward to prevent water or other foreign objects from
entering the vent pipe. In that case, two long radius elbows
may be employed, facing downward and terminating no less
than one foot (1’) from the roof surface or expected snow
level.
Protection From Freezing
The vent pipe and drain assembly must be properly protected
from freezing particularly if it is installed in an UNHEATED
SPACE. Low wattage tape heaters should be employed on
the drain system. The vent pipe should be insulated using a
one (1) inch thick closed foam insulation if exposed to the
outdoors. For pipes located indoors or protected from the
elements such as a garage, basement, etc. fiberglass with
an R value of 7 or greater is acceptable.
CAUTION
DO NOT
INSTALL THE VENT PIPE IN THE SAME CHASE
WITH THE VENT FROM ANOTHER FUEL BURNING
APPLIANCE, EXCEPT WITH A GMN, GMPN, GSUS, GSU,
GSM, GSMS OR ANOTHER GMNT 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 THESE INSTRUCTIONS.
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,
OVERHANG OR IN A POSITIVE PRESSURE AREA. THE
RECIRCULATION OF VENT PRODUCTS MAY OCCUR.
CONSULT LOCAL CODES FOR SPECIAL ADDITIONAL
REQUIREMENT.
THE COMBUSTION PRODUCTS 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:
1. Layout the vent system to avoid the possibility of
interference with beams, poles, posts, electrical wiring,
plumbing, etc.
2. When possible, the vent termination/combustion air
supply pipe should not be subjected to prevailing winds.
3. The vent terminal must be located at least twelve (12)
inches above grade or expected snow depth.
Consideration should be given to past unusual snowfalls.
4. 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 around the
penetration.
CONDENSATE DRAIN
This furnace is designed to remove both sensible and latent
heat from the combustion products. As a result water vapor
is condensed in the secondary heat exchanger. This
condensate must be drained either to the outdoors or, where
local code permits, to a sewage system.
In areas where floor level drains are not available, a
condensate pump may be employed. This condensate
pump must be constructed of corrosion resistant materials.
It must also have an auxiliary switch that will shut down the
furnace in the event of a pump failure or drain tube blockage.
DO NOT
run the condensate drain to an outdoor drain or to
an unheated area where the possibility of freezing may
occur.
Note:
Some locals require the condensate to be neutralized.
Check local codes.
