Installations Instructions

ManualsBrandsGoodman ManualsCentral Air & Heating2.5 Ton 15.5 SEER 98% AFUE 80,000 BTU Gas Furnace and Air Conditioner System - Upflow

problems. Do not install the furnace where the

combustion air is exposed to the following

substances:

permanent wave solutions

chlorinated waxes or cleaners

chlorine-based swimming pool chemicals

water softening chemicals

deicing salts or chemicals

carbon tetrachloride

halogen type refrigerants

cleaning solutions (such as perchloroethylene)

printing inks

paint removers

varnishes

hydrochloric acid

cements and glues

antistatic fabric softeners for clothes dryers

masonry acid washing materials

• Isolate a non-direct furnace from an area

contaminated by any of the above substances.

This protects the non-dir ect vent furnace from

airborne contaminants. To ensure that the

enclosed non-dir ect vent furnace has an

adequate supply of combustion air, air must be

ducted in from a nearby uncontaminated room

or from outdoors. Refer to the Combust i on and

Vent il at i on Air Requi r ement s for details.

• If the furnace is used in connection with a cooling

unit, install the furnace upstream or in parallel

with the cooling coil. Premature heat exchanger

failure will result if the cooling coil is placed

upstream of the furnace.

For vertical (upflow or downflow) applications,

the minimum cooling coil width shall not be less

than furnace width minus 1”. Additionally, a

coil installed above an upflow furnace or under

a counterflow furnace may be the same width

as the furnace or may be one size larger than

the furnace. Exampl e: a “ C” widt h coil may be

inst al l ed wit h a “ B” widt h f urnace.

For upflow applications, the front of the coil

and furnace must face the same direction.

• If the furnace is installed in a residential garage,

position the furnace so that the burners and

ignition source are located not less than 18

inches (457 mm) above the floor. Protect the

furnace from physical damage by vehicles.

• If the furnace is installed horizontally, ensure

the access doors are not on the “up/top” or

“down/bottom” side of the furnace.

• Do not connect this furnace to a chimney flue

that serves a separate appliance designed to

burn solid fuel.

• On Counterflow Installations, the air

conditioning coil must be downstream on the

supply (positive) side of the furnace heat

exchanger.

• Count erf low Inst all at ion over a noncombust i bl e

f l oor. Before setting the furnace over the plenum

opening, ensure the surface around the opening

is smooth and level. A tight seal should be made

between the furnace base and floor by using a

silicone rubber caulking compound or cement

grout.

• Count er f low Inst al lat ion over a combust ible f loor.

If installation over a combustible floor becomes

necessary, use an accessory subbase (see

Specification Sheet applicable for your model for

details.) A special accessory subbase must be used

for upright counterflow unit installations over any

combustible material including wood. Refer to

subbase instructions for installation details. Follow

the instructions with the subbase for proper

installation. Do not install the furnace directly on

carpeting, tile, or other combustible material

other than wood flooring. (NOTE: The subbase will

not be required if an air conditioning coil is installed

between the supply air opening on the furnace and

the floor.)

CLEARANCES AND ACCESSIBILITY

POSITION* FRONT SIDES REAR TOP FLUE FLOOR

Upflow 3" 0" 0" 1" 0" C

Horizontal Alc ove 6" 0" 4" 0" C

C = If placed on combustible floor, floor MUST be wood only.

*MVM97* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS

(INCHES)

NOTES:

• For servicing or cleaning, a 24” front clearance is required.

• Unit connections (electrical, flue and drain) may necessitate

greater clearances than the minimum clearances listed above.

• In all cases, accessibility clearance must take precedence over

clearances from the enclosure where accessibility clearances are

greater.

POSITION* SIDES REAR FRONT BOTTOM FLUE TOP

Counterflow 0" 0" 3" NC 0" 1"

Horizontal 6" 0" 3" C 0" 6"