4
PRODUCT DESIGN Notes:
1. Installermust supplyoneortwoPVC pipes:oneforcom-
bustionair(optional)andonefortheflueoutlet(required).
Ventpipemustbeeither2” or 3” in diameter, depending
uponfurnaceinput,numberofelbows,lengthofrunand
installation (1 or 2 pipes). The optional Combustion Air
Pipeis dependentoninstallation/coderequirementsand
must be 2” or 3” diameter PVC.
2. Linevoltage wiringcanenterthroughtheright or leftside
ofthefurnace.Low voltage wiring can enter throughthe
rightor left sideof furnace.
3. Conversionkits forpropanegasandhighaltitude natural
andpropanegasoperation are available. See HighAlti-
tudeDerate chart for details.
4. Installer must supply the following gas line fittings, de-
pendingon which entrance isused:
Left -- Two 90° Elbows, one close nipple, straight pipe
Right --Straight pipe to reachgasvalve.
Accessibility Clearances (Minimum)
POSITION* FRONT SIDES REAR TOP FLUE FLOOR
Upflow30010 C
Horizontal Alcove 6 0 4 0 C
*= All positioning is determined as installed unit is viewed from the front.
C= If placed on combustible floor, floor MUST be wood only.
POSITION* FRONT SIDES REAR TOP FLUE FLOOR
Upflow10010NC
Horizontal Alcove 6 0 4 0 C
*= All positioning is determined as installed unit is viewed from the front.
C= If placed on combustible floor, floor MUST be wood only.
*MVC95* MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
NC= For instalaltion on non-combustible floors only. A combustible
subbase must be used for installations on combustible flooring.
*CVC9 MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
(INCHES)
NC= For instalaltion on non-combustible floors only. A combustible
subbase must be used for installations on combustible flooring.
AlcoveIllustration
REAR
SIDE
SIDE
LCOVE
24"at frontisrequiredforservicing orcleaning.
Note: In all cases accessibility clearance shall take
precedence over clearances from the enclosure where
accessibility clearances are greater. All dimensions are
givenininches.
GeneralOperation
Modelscoveredbythismanualcomewithanew4-wirecom-
municatingPCB. Whenpairedwithacompatiblecommuni-
catingindoor unit and aCTK0* communicating thermostat,
these models can support 4-wire communication protocol
andprovidemoretroubleshooting information. These mod-
els are also backward compatible with the legacy thermo-
stat wiring.
The GCVC9, GCVC95, GMVC95, AMVC95 and ACVC95
furnaces are equipped with an electronic ignition device to
light the burners and an induced draft blower to exhaust
combustionproducts.
Aninterlockswitch prevents furnace operation iftheblower
dooris not in place. Keep the bloweraccess doors in place
exceptforinspection and maintenance.
Thesefurnacesarealsoequippedwithaself-diagnosingelec-
tronic control module. In the event a furnace component is
notoperatingproperly,thecontrol module's dual 7-segment
LED'swill display an alpha-numericcode, depending upon
theproblemencountered.
Forinformationregarding diagnostics andLEDcodes refer
to the Installation Instructions shipped with the furnace or
theservicemanual.PDFavailableat www.goodmanmfg.com
orwww.amana-hac.com.
Theratedheatingcapacity of the furnace shouldbegreater
thanor equal tothe total heatloss of thearea to be heated.
The total heat loss should be calculated by an approved
methodorin accordance with “ASHRAE Guide”or“Manual
J-LoadCalculations” published by the Air ConditioningCon-
tractors of America.
*Obtain from: American National Standards Institute 1430
BroadwayNewYork,NY 10018
LocationConsiderations
• The furnace should be as centralized as is practical
with respect to the air distribution system.
• Donotinstallthefurnace directly on carpeting, tile,or
combustiblematerialotherthan wood flooring.
• When suspending the furnace from rafters or joists,
use 3/8" threaded rod and 2” x 2” x 1/8” angle as
shownin theInstallationandService Instructions.The
length of the rod will depend on the application and
clearancenecessary.
• When installed in a residential garage, the furnace
mustbepositioned so the burners and ignitionsource
are located not less than 18 inches (457 mm) above
the floor and protected from physical damage by ve-
hicles.
