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Page 10 USSC
Installation
Furnace location
Before you start!
It is very important you check with your dealer, local fire
department, or building inspector. They will be able to in-
form you of any state or local codes pertaining to the loca-
tion and installation of your furnace.
The ideal location for your furnace is centrally located in
the basement. This allows for an even heat distribution by
having all the duct work approximately the same length.
Ideal locations cannot always be used for one reason or
another, therefore, let's look at some alternatives.
If your home does not have a basement, but a utility room
or garage, make sure there is enough space to maintain
the required clearances stated on the label located on the
furnace. Also, read about combustion air.
INSTALLATION #1
With this installation, a back draft damper (optional) is in-
serted into the heat run before the plenum of the existing
furnace to prevent air from the existing furnace to blow
back into the furnace when it is not in use. When a back
damper is employed, it should be located as close to the
existing furnace plenum as practical.
Chimney location is also critical. The furnace must be
placed as close as possible to the chimney. You want the
chimney connector (smoke pipe) to have a minimum of
elbows, two (2) or less. Also, the chimney connector should
not have to run more than six (6) feet to the chimney.
CAUTION: The warm-air supply outlet of the Fur-
nace should not be connected to the cold-air re-
turn inlet of the central furnace because a possibil-
ity exists of components of the central furnace over-
heating and causing the central furnace to operate
other than as intended.
After installation, be sure the measured external static pres-
sure of the central and Furnace is not greater than those
marked on the nameplates.
INSTALLATION #2
Extending the hot air duct from the furnace into the exist-
ing plenum will help direct the flow of air from the furnace
as well as the flow in the existing furnace. Ducting enter-
ing the existing plenum at an angle (approximately 45 de-
grees) will facilitate air flow from the furnace while divert-
ing air from the existing furnace.
INSTALLATION #3
The baffle on this system should be made the full width of
the furnace plenum in order to properly direct the air into
the distribution ducts.
(Optional)
Back Draft
Damper
Furnace
Existing
Furnace
Furnace
Existing
Furnace
Baffle
Furnace
Existing
Furnace