Trane R8GD Series User manual
Premium Model Shown
13 SEER / 80% AFUE
Single Package Gas Heating / Electric Cooling
*R8GD / PPG3GD SERIES
INSTALLATION INSTRUCTIONS
DO NOT DESTROYTHIS MANUAL. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
FIRE OR EXPLOSION HAZARD
• Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
• Installationandservicemustbeperformed
byaqualiedinstaller,serviceagencyorthe
gassupplier.
• Do not store or use gasoline or other
ammablevaporsandliquidsinthevicinity
ofthisoranyotherappliance.
WHAT TO DO IF YOU SMELL GAS
• Donottrytolightanyappliance.
• Donottouchanyelectricalswitch;donotuse
anyphoneinyourbuilding.
• Leavethebuildingimmediately.
• Immediately call your gas supplier from a
neighbor’sphone.Followthegassupplier’s
instructions.
• Ifyoucannotreachyourgassupplier,callthe
redepartment.
RISQUED’INCENDIEOUD’EXPLOSION
•Le non-respect des avertissements de
sécurité pourrait entraîner des blessures
graves,lamortoudesdommagesmatériels.
•L’installation et l’entretien doivent être
effectués par un installateur qualié, un
organismedeservice ou le fournisseurde
gazstaller,serviceagencyorthegassupplier.
•Nepasentreposerniutiliserdel’essenceni
d’autres vapeurs ou liquides inammables
danslevoisinagedecetappareil,nidetout
autreappareil.
QUEFAIRES’ILYAUNEODEURDEGAZ
•Nepastenterd’allumeraucunappareil.
•Netoucheràaucuninterrupteurélectrique;
n’utiliseraucuntéléphonedanslebâtiment.
•Évacuerl’immeubleimmédiatement.
•Appeler immédiatement le fournisseur de
gazenemployantletéléphoned’unvoisin.
Respecter à la lettre les instructions du
fournisseurdegaz.
•Sipersonnenerépond,appelerleservicedes
incendies.
WARNING: AVERTISSEMENT
2
IMPORTANT SAFETY INFORMATION .......................3
REQUIREMENTS & CODES.......................................4
GENERAL INFORMATION..........................................5
BeforeYou Install this Unit.........................................5
Locating the Equipment.............................................5
Combustion Air Requirements ..................................5
Heating Load ............................................................5
COMbUSTION AIR &VENTING REQUIREMENTS ...6
General Information ..................................................7
Vent Termination .......................................................7
CIRCULATING AIR SUPPLY ......................................8
Air Ducts ...................................................................8
Air Filter Requirements .............................................8
Unconditioned Spaces...............................................8
Acoustical Duct Work.................................................8
UNIT INSTALLATION ..................................................9
Packaging Removal...................................................9
Rigging & Hoisting.....................................................9
Clearances to Combustible Materials........................9
Rooftop......................................................................9
Ground Level.............................................................9
Condensate Drain .....................................................9
Horizontal to Downflow Conversion...........................9
ELECTRICALWIRING...............................................10
Pre - Electrical Checklist .........................................11
Grounding................................................................11
Line Voltage.............................................................11
Thermostat / Low Voltage Connections ..................11
Checking Heat Anticipator Settings......................11
Blower Speed..........................................................12
5-Speed ECM Motor............................................12
PSC Motor ...........................................................12
Optional Furnace Control Board Connections ........12
Electronic Air Cleaner..........................................12
Humidifier.............................................................12
GAS SUPPLY & PIPING............................................13
Leak Check..............................................................13
High Altitude Conversion - Natural Gas ..................14
Lp / Propane Gas Conversion.................................14
STARTUP & ADJUSTMENTS ...................................16
Pre - Start Checklist ................................................16
Start-up Procedure..................................................16
Air Circulation.......................................................16
System Cooling....................................................16
System Heating....................................................16
Verifying & Adjusting Temperature Rise..................16
Verifying & Adjusting Firing Rate.............................17
Manifold Pressure Adjustment ................................17
Verifying Operation of Over-Temperature
Limit Control ............................................................17
Verifying Burner Operation......................................18
Refrigerant Charging...............................................18
OPERATING SEQUENCE .........................................18
Heating Mode..........................................................18
Cooling Mode..........................................................19
Fan Mode ................................................................19
REPLACEMENT PARTS............................................19
EQUIPMENT MAINTENANCE...................................19
Cleaning of Heat Exchanger ...................................20
Cleaning of Burners.................................................20
COMPONENT FUNCTIONS......................................21
TROUbLESHOOTING...............................................21
FIGURES &TAbLES .................................................22
Figure 9. Unit Dimensions....................................22
Table 7. Center of Gravity & Shipping Weights.....22
Airflow Information...................................................23
Table 8. Nominal Airflow Rates & Temp Rises .....23
Gas Information.......................................................24
Table 9. Gas Pipe Capacities...............................24
Table 10. Gas Flow Rates....................................24
Figure 10. Unit Gas Valve Label...........................25
Electrical Data & Diagrams .....................................26
Table 11. Electrical Data.......................................26
Figure 11.Wiring Diagram (ECM Motor)..............27
Figure 12.Wiring Diagram (PSC Motor) ..............28
Charging Tables & Charts.......................................29
Table 12. Charging Table for 2 Ton Units..............29
Table 13. Charging Table for 2.5 Ton Units...........29
Table 14. Charging Table for 3 Ton Units..............30
Table 15. Charging Table for 3.5 Ton Units...........30
Table 16. Charging Table for 4 Ton Units..............31
Figure 13. Charging Chart for 5 Ton Units............31
INSTALLATION/PERFORMANCE CHECKLIST.......32
TAbLE OF CONTENTS
3
IMPORTANT SAFETY INFORMATION
Pleasereadallinstructionsbeforeservicingthisequipment.
Payattentiontoallsafetywarningsandanyotherspecial
notes highlighted in the manual. Safety markings are
used frequently throughout this manual to designate a
degreeorlevelofseriousnessandshouldnotbeignored.
WARNINGindicatesapotentiallyhazardoussituationthat
if not avoided, could result in personal injury or death.
CAUTIONindicatesapotentiallyhazardoussituationthat
if not avoided, may result in minor or moderate injury or
property damage.
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Beforeservicing,disconnectallelectricalpower
totheunit.
• Whenservicingcontrols,labelallwiresprior
todisconnecting.Reconnectwirescorrectly.
• Verifyproperoperationafterservicing.
WARNING:
These units are fully charged with R-410A
refrigerant and ready for installation. When
a system is installed according to these
instructions, no refrigerant charging is
required. If repairs make it necessary for
evacuation and charging, it should only be
attempted by qualied, trained personnel
thoroughlyfamiliarwiththisequipment.Some
local codes require licensed installation
service personnel to service this type of
equipment.Undernocircumstancesshouldthe
homeownerattempttoinstalland/orservice
this equipment. Failure to comply with this
warningcouldresultinequipmentdamage,
personalinjury,ordeath.
WARNING:
Donotplacecombustiblematerialonoragainst
the unit cabinet. Do not place combustible
materials, including gasoline and any other
ammablevaporsand liquids,inthe vicinity
oftheunit.
WARNING:
PROPOSITION 65 WARNING: This product
contains berglass wool, a product known
to the state of California to cause cancer.
Disturbingtheinsulationofthisproductduring
installation,maintenance,orrepairwillexpose
youtoberglasswool.
• Breathingthismaterialmaycauserespiratory
irritationsormaycauselungcancer.
• Fiberglasswoolmayalsocauseeyeirritation,
skinsensitization,orotherallergicresponses
insusceptibleindividuals.
• Always wear goggles, disposable gloves,
longsleevedshirt,andappropriatebreathing
protectionwhenworkingnearthisinsulation.
Ifcontactwithskinoccurs,washimmediately
withsoapandwater.Incaseofcontactwith
eyes,ushimmediatelywithwaterforatleast
15minutes.Contactaphysicianifneeded.
WARNING:
Theinformationlistedbelowandonthenext
pagemustbefollowedduringtheinstallation,
service,andoperationofthisunit.Unqualied
individualsshouldnotattempttointerpretthese
instructionsorinstallthisequipment.Failure
tofollowsafetyrecommendationscouldresult
inpossibledamagetotheequipment,serious
per
sonalinjuryordeath
.
• Before beginning the installation, verify that the unit
model is correct for the job. The unit model number
is printed on the data label. Follow all precautions in
the literature, on tags, and on labels provided with
the equipment. Read and thoroughly understand
the instructions provided with the equipment prior to
performing the installation and operational checkout
of the equipment.
• Never test for gas leaks with an open ame. Use
a commercially available soap solution to check all
connections. See page 13.
• Installationofequipmentmayrequirebrazingoperations.
Installer must comply with safety codes and wear
appropriate safety equipment (safety glasses, work
gloves,fireextinguisher,etc.)whenperformingbrazing
operations.
• ThisequipmentisNOTtobeusedfortemporaryheating
of buildings or structures under construction.
• Usecautionwhenhandlingthisapplianceorremoving
components.Personalinjurycanoccurfromsharpmetal
edgespresentinallsheetmetalconstructedequipment.
• Follow all precautions in the literature, on tags, and
on labels provided with the equipment. Read and
4
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
• Theinstallershouldbecomefamiliarwiththeunitswiring
diagram before making any electrical connections to
the unit. See the unit wiring label or Figures 11 & 12
(pages 27 & 28).
REQUIREMENTS & CODES
• Thisequipmentmustbeinstalledinaccordancewith
instructionsoutlinedinthismanual,allapplicable
localbuilding codes,andthe currentrevisionof
theNationalFuelGasCode(NFPA54/ANSIZ223.1)
ortheNaturalGasandPropaneInstallationCode,
CAN/CGA b149.1.
• Allelectricalwiringmustbecompletedinaccordance
with local, state and national codes and regulations
and with the National Electric Code (ANSI/NFPA 70)
or in Canada the Canadian Electric Code Part 1 CSA
C.22.1.
• The installer must comply with all local codes and
regulations which govern the installation of this type
of equipment. Local codes and regulations take
precedence over any recommendations contained in
theseinstructions.Consultlocalbuildingcodesandthe
NationalElectricalCode(ANSICI)forspecialinstallation
requirements.
• Thisequipmentcontainsliquidandgaseousrefrigerant
underhighpressure.Installationorservicingshouldonly
beperformedbyqualifiedtrainedpersonnelthoroughly
familiar with this type equipment.
• Installthisunitonlyinalocationandpositionasspecied
on page 5. This unit is designed only for outdoor
installations and should be located with consideration
of minimizing the length of the supply and return ducts.
Considerationshouldalsobegiventotheaccessibilityof
fuel, electric power, service access, noise, and shade.
• Air Ducts must be installed in accordance with the
standards of the National Fire Protection Association
“Standards for Installation of Air Conditioning and
Ventilation Systems” (NFPA 90A), “Standard for
InstallationofResidenceTypeWarmAirHeatingandAir
ConditioningSystems”(NFPA90B),theseinstructions,
and all applicable local codes.
• ConsultTable10(page23),andtheratingplateforthe
proper circulating air flow and temperature rise. It is
important that the duct system be designed to provide
the correct flow rates and external pressure rise. An
improperlydesignedductsystemcanresultinnuisance
shutdowns, and comfort or noise issues.
• Useonly withthetypeofgasapprovedfor thisunit.
Refer to the unit rating plate.
• Provideadequatecombustionandventilationairtothe
unit. See pages 6 - 7.
• Provideadequateclearancesaroundthecombustion
air intake louvers. See Figure 1 (page 5).
• Combustion products must be discharged outdoors.
Connect this unit to an approved vent system only, as
specified on page 7.
• Theinformationlistedbelowisforreferencepurposes
only and does not necessarily have jurisdiction over
localorstatecodes.Alwaysconsultwithlocalauthorities
before installing any gas appliance.
Combustion&VentilationAir
• US:NationalFuelGasCode(NFGC),AirforCombustion
and Ventilation
• CANADA:NaturalGasandPropaneInstallationCodes
(NSCNGPIC), Venting Systems and Air Supply for
Appliances
DuctSystems
• US and CANADA: Air Conditioning Contractors
Association (ACCA) Manual D, Sheet Metal and
Air Conditioning Contractors National Association
(SMACNA), or American Society of Heating,
Refrigeration,andAirConditioningEngineers(ASHRAE)
Fundamentals Handbook
Electrical Connections
• US:NationalElectricalCode(NEC)ANSI/NFPA70
• CANADA:CanadianElectricalCodeCSAC22.1
GasPiping&GasPipePressureTesting
• US:NFGCandNationalPlumbingCodes
• CANADA:NSCNGPIC
General Installation
• US:CurrenteditionoftheNFGCandtheNFPA90B.For
copies,contacttheNationalFireProtectionAssociation
Inc.,BatterymarchPark,Quincy,MA02269;orAmerican
GasAssociation,400N.Capitol,N.W.,WashingtonDC
20001 or www.NFPA.org
• CANADA:NSCNGPIC.Foracopy,contactStandard
Sales, CSA International, 178 Rexdale Boulevard,
Etobicoke (Toronto), Ontario, M9W 1R3 Canada
Safety
• US: (NFGC) NFPA 54–1999/ANSI Z223.1 and the
Installation Standards, Warm Air Heating and Air
Conditioning Systems ANSI/NFPA 90B.
• CANADA: CAN/CGA-B149.1 and .2–M00 National
Standard of Canada. (NSCNGPIC)
5
GENERAL INFORMATION
This Single Package Gas Heating / Electric Cooling
Unit is designed only for outdoor rooftop or ground level
slab installations and can be readily connected to the
high static duct system of a home. This unit has been
tested for capacity and efficiency in accordance with
AHRI standards and will provide many years of safe and
dependable comfort, providing it is properly installed
and maintained. With regular maintenance, this unit will
operate satisfactorily year after year. Abuse, improper
use, and/or improper maintenance can shorten the life
of the appliance and create unsafe hazards.
Toachieveoptimumperformanceandminimizeequipment
failure, it is recommended that periodic maintenance be
performed on this unit. The ability to properly perform
maintenance on this equipment requires certain tools
and mechanical skills.
Beforeyouinstallthisunit
√The cooling load of the area to be conditioned must be
calculatedandasystemofthepropercapacityselected.
It is recommended that the area to be conditioned be
completely insulated and vapor sealed.
√Checkthe electricalsupply andverify the powersupply
isadequatefor unitoperation. Considerationshould be
given to availability of electric power, service access,
noise, and shade. If there is any question concerning
the power supply, contact the local power company.
√Allunitsaresecurelypackedatthetimeofshipmentand
upon arrival should be carefully inspected for damage
prior to installing the equipment at the job site. Verify
coil fins are straight. If necessary, comb fins to remove
flattened or bent fins. Claims for damage (apparent or
concealed)shouldbefiledimmediatelywiththe carrier.
√Survey the job site to determine the best location for
setting the unit. Choose an appropriate location that
minimizes the length of the supply and return air ducts.
√Pleaseconsultyourdealerformaintenanceinformation
and availability of maintenance contracts. Please read
all instructions before installing the unit.
LocatingtheEquipment
• Selectasolid,levelposition,preferablyonaconcrete
slab, slightly above the grade level, and parallel to the
home. DO NOT PLACE UNIT UNDER THE HOME.
• Overhead obstructions, poorly ventilated areas, and
areas subject to accumulation of debris should be
avoided. Do not place the unit in a confined space or
recessed area where discharge air from the unit to re-
circulate into the condenser air inlet, through the coil.
• Sufcientclearanceforunobstructedairowthroughthe
louvered control access panel and outdoor coil must
be maintained in order to achieve rated performance.
See Figure 1 for minimum clearances to obstructions.
• Aclearanceofatleast36inchesfromthebloweraccess
panel and from the louvered control access panel is
recommended for servicing and maintenance. Where
accessibilitytocombustiblesclearancesaregreater
thanminimumclearances,accessibilityclearances
musttakepreference.
• Thehotcondenserairmustbedischargedupandaway
from the home, and if possible, in a direction with the
prevailing wind.
• Ifpractical,placetheairconditioneranditsductsinan
areawheretheywill beshadedfrom theafternoonsun,
when the heat load is greatest.
HeatingLoad
This unit should be sized to provide the design heating
load requirement. Heating load estimates can be made
using approved methods available from Air Conditioning
Contractors of America (Manual J); American Society of
Heating, Refrigerating, and Air Conditioning Engineers;
orotherapprovedengineeringmethods.Forinstallations
above 2,000 ft., the unit should have a sea level input
rating large enough that it will meet the heating load after
deration for altitude.
Minimum Required
Clearances to Combustibles
36"
36"
36"
TOP OF UNIT
TO BE
UNOBSTRUCTED
See Note 1 See Note 2
NOTE 1: 6” When coil is present on duct side.
NOTE 2: 1” When no coil is present on duct side.
Figure1.ClearanceRequirements
6
WARNING:
CARbON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for
eachapplianceconnectedtotheventingsystem
beingplacedintooperationcouldresultincarbon
monoxidepoisoningordeath.Thefollowingsteps
shallbefollowedwitheachindividualappliance
connectedtotheventingsystembeingplacedin
operation,whileallotherappliancesconnectedto
theventingsystemarenotinoperation:
1.Sealanyunusedopeningsintheventingsystem.
2.Inspecttheventingsystemforpropersizeand
horizontalpitch,asrequiredintheNationalFuel
GasCode,ANSI Z223.1/NFPA 54 orthe CSA
B149.1,NaturalGasandPropaneInstallation
Codesandtheseinstructions.Determinethat
there is no blockage or restriction, leakage,
corrosionandotherdeciencieswhichcould
causeanunsafecondition.
3.Asfaraspractical,closeallbuildingdoorsand
windowsandalldoorsbetweenthespacein
whichtheappliance(s)connectedtotheventing
system are located and other spaces of the
building.
4.Closereplacedampers.
5.Turn on clothes dryers and any appliance
notconnectedtotheventingsystem.Turnon
any exhaust fans, such as range hoods and
bathroomexhausts,sotheyareoperatingat
maximum speed. Do not operate a summer
exhaustfan.
6.Follow the lighting instructions. Place the
appliance being inspected into operation.
Adjustthethermostatsoapplianceisoperating
continuously.
7.Test for spillage from draft hood equipped
appliances at the draft hood relief opening
after5minutesofmainburneroperation.Use
theameofamatchorcandle.
8.Ifimproperventingisobservedduringanyof
theabovetests,theventingsystemmustbe
correctedinaccordancewiththeNationalFuel
GasCode,ANSIZ223.1/NFPA54and/orCSA
B149.1,NaturalGasandPropaneInstallation
Codes.
9.Afterithasbeendeterminedthateachappliance
connectedtotheventingsystemproperlyvents
whentestedasoutlinedabove,returndoors,
windows,exhaustfans,replacedampersand
anyothergas-redburningappliancetotheir
previousconditionsofuse.
AVERTISSEMENT:
RISQUED’EMPOISONNEMENTAU
MONOXYDE DE CARbONED
Le non-respect des consignes suivantes portant
sur chacun des appareils raccordés au système
d’évacuation mis en service pourrait entraîner
l’empoisennement au monoxyde de carbone ou
la mort. Les consignes suivantes doivent être
observéespourchaqueappareilraccordéausystème
d’évacuationmisenservicesilesautresappareils
raccordésausystèmenesontpasenservice:
1.Scellertouteouverturenonutiliséedelasystéme
d’évacuation;
2.S’assurerquelasystémed’évacuationprésente
des dimensions et une pente horizontale
conformes à la norme ANSI Z223.1/NFPA
54, intitulée National Fuel Gas Code ou aux
codes d’installation CSA-B149.1, ainsi qu’aux
présentesinstructions.S’assurerquelasystéme
d’évacuation n’est pas bloquée, restreinte,
corrodée,qu’ellenefuitpasetqu’elleneprésente
aucunautredéfautpotentiellementdangereux;
3.Danslamesuredupossible,fermertoutesles
portesetfenêtresdubâtiment,ettouteslesportes
entrelapièceoùsetrouvel’appareilraccordéà
lasystémed’évacuationetlesautrespiècesdu
bâtiment.
4.Fermerlesregistresdesfoyers;
5.Mettre en service les sécheuses et tout autre
appareil qui n’est pas raccordé à la systéme
d’évacuation.Fairefonctionneràrégimemaximal
toutventilateurd’évacuation,telqueleshottesde
cuisinièreetlesventilateursdesallesdebains.
Nepasmettreenservicelesventilateursd’été.
6.Respecterlesinstructionsd’allumage.Mettreen
servicel’appareilàl’essai.Réglerlethermostat
demanièreàcequel’appareilfonctionnesans
interruption;
7.Vériers’ilyadébordementàl’oriced’évacuation
ducoupetiragedesappareilsdotésd’uncoupe
tirage 5 minutes après l’allumage du brûleur
principal.Utiliserlaammed’uneallumetteou
d’unechandelle.
8.Si l’on constate, au cours de l’un des essais
qui précèdent, que l’évacuation est déciente,
corrigerlesystèmed’évacuationconformément
à la norm ANSI Z223.1/NFPA 54, National Fuel
GasCode,et(ou)auxcodesd’installationCSA
b149.1.
9.Après avoir déterminé que tous les appareils
raccordésàla systémed’évacuationévacuent
correctementtelqueprescritci-dessus,rouvrirles
portesetlesfenêtresetremettrelesventilateurs
d’évacuation, les registres de foyers et tout
autreappareilfonctionnantaugazàleurétatde
fonctionnementinitial.
COMbUSTION AIR &VENTING REQUIREMENTS
7
GeneralInformation
WARNING:
Installationmethodsotherthanthosedescribed
inthefollowingsectionsmustcomplywiththe
NationalFuelGasCodeandallapplicablelocal
codesforprovidingsufcientcombustionair
totheunit.
• Provisions must be made during the installation of
this unit that provide an adequate supply of air for
combustion.
• Instructions for determining the adequacy of an
installation can be found in the current revision of the
NFGC(ANSIZ223.1/NFPA54).Consultlocalcodes
forspecialrequirements. Theserequirementsare for
US installations as found in the NFGC.
• TherequirementsinCanada(B149.1)arestructured
differently. Consult with B149.1 and local code officials
for Canadian installations.
WARNING:
Combustible air must not be drawn from a
contaminatedatmosphere.Excessiveexposure
tocontaminatedcombustionairwillresultin
safetyandperformancerelatedproblems.
• Tomaximizeheatexchangerlife,thecombustionair
mustbefreeofchemicalsthatcanformcorrosiveacidic
compoundsinthecombustiongases.Therecommended
sourceofcombustionairistousecleanairfromoutside.
DO NOT place any chemicals with ammable or
causticvaporsortheseothercorrosivechemicals
neartheventtermination:
• Gasoline/Kerosene
• Permanentwavesolutions
• Chlorinatedwaxesandcleaners
• Chlorinebasedswimmingpoolchemicals
• Watersofteningchemicals
• De-icingsaltsorchemicals
• Carbontetrachloride
• Halogentyperefrigerants
• Cleaningsolvents
• Cements,glues,paintremovers,varnishes,etc.
• Hydrochloricacid
• Masonryacidwashingmaterials
• PlumbingStack
VentTermination
This unit has been equipped with an integral venting
system and designed to operate only with this venting
system. No additional venting shall be used. This unit
must be vented to the outdoors.
WARNING:
Thisunitis intendedfor outdoorinstallation
only.Donotventtheunitthroughaconventional
ventingsystem.
Figure2.VentAssembly
A vent cover assembly has been supplied with the unit.
and can be found secured to the gas controls within
the control area of this unit. Theventcoverassembly
mustbeinstalledtoassureproperoperationofthe
unit.Figure 2 shows the proper installation of the vent
cover assembly over the vent outlet on the exterior of the
cornerpanel.Thefastenersusedtosecuretheventcover
assembly have been included in the owner’s package.
The following list summarizes the requirements for the
locationoftheventsystemtermination:
• Thelocationoftheventterminationmustbeconsistent
withtheNationalFuelGasCode(ANSIZ223.1)orCAN/
CGA-B149 Installation Codes.
• Thevent termination mustbelocated at least4feet
horizontally from any electric meters, gas meters,
regulators, and relief equipment.
• Thevent termination mustbelocated at least3feet
above any forced air inlet located within 10 feet.
• Thevent termination mustbelocated at least4feet
below, 4 feet horizontally from, or 1 foot above any
door, window, or gravity air inlet into any building.
• Thevent termination mustbelocated at least1foot
above grade.
• Theunitshouldbeinstalledinawaythatpreventsany
obstructionoftheventterminationduringaccumulating
snow.
• Theunitinstallationshallavoidareaswherecondensate
drainage may cause problems by dropping on planters
or patios, etc. Also verify exhaust gases will not
impinge on windows or building surfaces, which may
be compromised or damaged by condensation.
• Donotinstalltheunitsuchthatexhaustfromthevent
termination is directed into window wells, stairwells,
under decks, or in alcoves or similarly recessed areas.
The vent termination must not be located above any
public walkways.
8
CIRCULATING AIR SUPPLY
WARNING:
Productsofcombustionmustnotbeallowedto
enterthereturnairductworkorthecirculating
air supply. Failure to prevent products of
combustion from being circulated into the
livingspacecancreatepotentiallyhazardous
conditions including carbon monoxide
poisoningthatcouldresultinpersonalinjury
ordeath.
Allreturnductworkmustbeadequatelysealed,
alljointsmustbetaped,andtheductworkmust
besecuredtotheunitwithsheetmetalscrews.
Whenreturnairisprovidedthroughthebottom
oftheunit,thejointbetweentheunitandthe
returnairplenummustbeairtight.
Theroofcurborcementpadonwhichtheunitis
mountedmustprovidesoundphysicalsupport
of the unit with no gaps, cracks, or sagging
betweentheunitandthecurborpad.
Returnairandcirculatingairductworkmustnot
beconnectedtoanyotherheatproducingdevice
suchasareplaceinsert,stove,etc.Doingso
mayresultinre,explosion,carbonmonoxide
poisoning,personalinjury,orpropertydamage.
Air Ducts
Thisunit isdesignedonly for usewith a supplyand return
duct. Air ducts should be installed in accordance with the
standards of the National Fire Protection Association
“Standard for Installation of Air Conditioning Systems”
(NFPA90A),“StandardforInstallationofResidenceType
Warm Air Heating and Air Conditioning Systems” (NFPA
90B), and all applicable local codes. NFPA publications
are available by writing to: National Fire Protection
Association, Batterymarch Park, Quincy, ME 02269 or
visit www.NFPA.org on the web.
• DesigntheductworkaccordingtoManualDbytheAir
Conditioning Contractors of America (ACCA).
• Theductsmustbeproperlysizednottoexceed0.30
inches WC pressure drop per 100 feet of equivalent
duct at 400 SCFM per nominal ton of cooling capacity.
• Ductworkshouldbeattacheddirectlytotheunitanges
for horizontal applications.
• Ifroofcurbisinstalled,theductsmustbeattachedto
the curb duct supports, not the unit.
• It is recommended that the outlet duct be provided
with a removable access panel. The opening should
be accessible when the unit is installed in service and
shall be sizes so that smoke or reflected light may be
observed inside the casing to indicate the presence of
leaks in the heat exchanger. The cover for the opening
shall be attached in a way that will prevent leaks.
• If outside air is utilized as return air to the unit for
ventilation or to improve indoor air quality, the system
must be designed so that the return air to the unit is
not less than 50° F (10° C) during heating operation.
Air Filter Requirements
WARNING:
Neveroperatetheunitwithoutalterinplace.
Dust and lint could accumulate on internal
parts,resultinginlossofefciency,equipment
damageandpossiblere.
NOTE TO INSTALLER: After installing or replacing the
filtration system for this unit, add the following statement
on or adjacent to the lter service panel: “Replace
lter(s)installedinyoursystemonlywiththesame
dimensionalsizeltersthatarebeingreplaced.”
• Asuitableairltermustbeinstalledupstreamofthe
evaporator coil of the return air system. Refer to Table
1 for recommended external filter sizes.
• Allreturnairmustpassthroughtheltersbeforeentering
the evaporator coil. It is important that all filters be kept
cleanandreplacedfrequentlytoensureproperoperation
of unit. Dirty or clogged filters will reduce the efficiency
of the unit and result in unit shutdowns.
• Airlterpressuredropmustnot exceed0.08 inches
WC.
Unconditioned Spaces
All duct work passing through unconditioned space must
beproperlyinsulatedtominimizeductlossesandprevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.
Acoustical Duct Work
Certain installations may require the use of acoustical
lining inside the supply duct work.
• Acoustical insulation must be in accordance with the
currentrevisionoftheSheetMetalandAirConditioning
ContractorsNationalAssociation(SMACNA)application
standard for duct liners.
• DuctliningmustbeULclassiedbattsorblanketswith
a fire hazard classification of FHC-25/50 or less.
• Fiberductworkmaybeusedinplaceofinternalduct
liners if the fiber duct work is in accordance with the
current revision of the SMACNA construction standard
on fibrous glass ducts. Fibrous duct work and internal
acoustical lining must be NFPA Class 1 air ducts when
tested per UL Standard 181 for Class 1 ducts.
Table1.RecommendedExternalAirFilterSizes
Nominal
Cooling
(Tonnage)
Approximate
AirFlow
Range(CFM)
Approximate
Filter Area
(Sq.In.)*
Recommended
Filter Size
(In.xIn.)
2.0 600-900 450 20 x 25
2.5 750-1200 550 20 x 30
3.0 1100-1300 625 25 x 25
3.5 1200-1600 750 24 x 30
4.0 1400-1800 850 18 x 24 (2 required)
5.0 1700-2200 1000 20 x 25 (2 required)
* Based on velocity of 300 ft/min for disposable filters.
9
UNIT INSTALLATION
PackagingRemoval
Remove the shipping carton and User’s Manual from the
equipment. For rooftop installations, remove and discard
the two supports attached beneath the unit.
Rigging & Hoisting
WARNING:
Toavoidtheriskofpropertydamage,personal
injury,ordeath,itistherigger’sresponsibility
toensurethatwhatevermeansareusedtohoist
theunitaresafeandadequate:
• Theliftingequipmentmustbeadequateforthe
load.RefertoTable7(page22)forunitweights.
• Theunitmustbeliftedfromtheholesinthe
baserailsusingcablesorchains.
• Spreaderbarsarerequiredtoprotecttheunit
andensureevenloading.
• Keeptheunitinanuprightpositionatalltimes.
Theriggingmustbelocatedoutsidetheunits
centerofgravity.RefertoFigure9(page22)
forlocatingthecenterofgravity.
• Allpanelsmustbesecurely in place during
riggingandhoisting.
ClearancestoCombustibleMaterials
These units are certified as combination heating and
cooling equipment for outdoor rooftop or ground level
installations. Units may be installed on combustible
flooring or Class A, B, or C roofing material when used
with bottom supply and return air ducts as long as the
followingrequirementsaremet:
• Ifusingbottomdischargewithreturnairductsaroof
curb must be installed prior to unit installation. See
Rigging and Hoisting section for setting of the unit.
• Sufcient clearance for unobstructed airow through
the outdoor coil must also be maintained in order to
achieverated performance.See page 5for information
about locating the equipment.
Rooftop
Rooftop installations must be located according to local
buildingcodesorordinancesandtheserequirements:
• Theroofmustbecapableofhandlingtheweightofthe
unit. For unit weights, see Table 7. Reinforce the roof
if necessary.
• Theappropriateaccessoryroofcurb(Figure3,page10)
must be installed prior to unit installation. The roof curb
mustbesquare and level to ensure proper condensate
drainage.Pleasefollowallinstructionsprovidedwith
thekit.
• Secure roof curb or frame to roof using acceptable
mechanicalmethodsperlocalcodes.NOTE:Makesure
the two supports beneath the unit have been removed.
GroundLevel
Ground level installations must be located according to
localbuildingcodesorordinancesandtheserequirements:
• Clearancesmustbeinaccordancewiththoseshown
in Figure 1 (page 5).
• A suitable mounting pad must be provided and be
separatefromthebuildingfoundation.Thepadmustbe
level to ensure proper condensate disposal and strong
enough to support the unit’s weight. The slab height
must be a minimum of 2” (5cm) above grade and with
adequate drainage. See Figure 4 (page 10).
• RemoveanddiscardthehorizontalSupplyandReturn
duct covers located on the rear of the unit. Form duct
attachmentflangesbybendingthesheetmetaloutward
90 degrees along the perforated lines.
• Firmlyattachductworkdirectlytotheseangeswith
screwsorotherapprovedmechanicalconnectionsand
not to the Supply/Return air panels to avoid damage to
internalcomponentsoftheequipment.Oncecompleted
use approved duct sealing methods to ensure an air
and watertight seal is achieved.
HorizontaltoDownowConversion
Theunitisshippedreadyforhorizontalductconnections.
Ifdownflowductsarerequired,theunitmustbeconverted
following the steps below for both the supply and return
ducts.
1.Remove the horizontal duct cap.
2.Locatetheductcapinsidetheductopeningsandremove
the screw holding it in place.
3.Liftthecapoutoftheunit.(Hint:Thecapcanbepushed
up from the bottom by reaching through the fork slot).
4.Cover the horizontal duct opening with the horizontal
duct cap.The insulation will be on the indoor side.
5.Fasten the cover with screws to seal.
6.Remove and discard the two wood supports beneath
the unit.
CondensateDrain
Condensate is removed from the unit through the 3/4”
female pipe fitting located on the front side of the unit.
See Figure 5 on page 10.
Install a 2 inch condensate trap in the drain line of the
same size and prime with water. When connecting rigid
drainline, hold the female fitting with a wrench to prevent
twisting. Donotovertighten! Refer to local codes and
restrictionsforpropercondensatedisposalrequirements.
10
ELECTRICALWIRING
Condensate Drain
High
Side
Low
Side
Figure5.RefrigerantServicePorts&
CondensateDrainLocations
ACCESSORY
ROOF CURB
Figure3.RoofTopInstallation
2”
Figure4.GroundLevelInstallation
• Electricalconnectionsmustbeincompliancewithall
applicable local codes with the current revision of the
National Electric Code (ANSI/NFPA 70).
• ForCanadianinstallations the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
IMPORTANTNOTE: Ifreplacinganyof theoriginal
wires supplied with the furnace, the replacement
wiremustbecopperwiringhavingthesameguage,
voltage,andtemperaturerating.
ELECTRICALSHOCK,FIREOREXPLOSION
HAZARD
Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
Improperservicingcouldresultindangerous
operation,serious injury,deathorproperty
damage.
• Beforeservicing,disconnectallelectrical
powertofurnace.
• Whenservicingcontrols,labelallwiresprior
todisconnecting.Reconnectwirescorrectly.
• Verifyproperoperationafterservicing.”
WARNING:
RISQUEDECHOCÉLECTRIQUE,D’INCENDIE
OUD’EXPLOSION
Le non-respect des avertissements de sécurité
pourraitentraîner
unfonctionnementdangereux
del’appareil,
desblessuresgraves,lamortou
desdommagesmatériels.
Unentretein incorrectpourrait entraînerun
fonctionnementdangereuxdel’appareil,des
blessuresgraves,lamortoudesdommages
matériels
• Couper toute alimentation électrique au
générateurd’airchaudavantde prodéder
auxtravauxd’entretein.
• Aumomentdel’entretiendescommandes,
étiqueteztousleslsavantdelesdébrancher.
S’assurerdelesraccordercorrectement.
•S’assurer que l’appareil fonctionne
adéquatementaprésl’entretien.
AVERTISSEMENT:
11
Pre-ElectricalChecklist
√Verify the voltage, frequency, and phase of the supply
sourcematchthespecificationsontheunit ratingplate.
√Verifythattheserviceprovidedbytheutilityissufficient
tohandletheadditionalloadimposedbythisequipment.
See Table 2 and Table 11 (page 26) (or the unit rating
label) for proper high voltage wiring requirements.
√Verify factory wiring is in accordance with the unit
wiringdiagram(Figures 11& 12,pages 27&28). Make
sure the connections didn’t loosen during shipping or
installation.
Grounding
WARNING:
Theunitcabinetmusthaveanuninterruptedor
unbrokenelectricalgroundtominimizepersonal
injuryifanelectricalfaultshouldoccur.Donot
usegaspipingasanelectricalground!
Thisunitmustbeelectricallygroundedinaccordancewith
local codes or, in the absence of local codes, with the
NationalElectricalCode(ANSI/NFPA70)ortheCSAC22.1
Electrical Code. Grounding of the unit is accomplished
by using the grounding lug provided in the control box.
LineVoltage
• Thelinevoltagetotheunitshouldbesuppliedfroma
dedicated branch circuit containing the correct fuse or
circuit breaker for the unit.
• Anelectricaldisconnectmustbelocatedwithinsight
ofandreadilyaccessibletotheunit.Thisswitchshall
becapableofelectricallyde-energizingtheoutdoorunit.
Seeunitdatalabel forproperincoming fieldwiring.Any
other wiring methods must be acceptable to authority
having jurisdiction.
• Useonlycopperwireforthelinevoltagepowersupply
to this unit (Table 2). Use proper code agency listed
conduit and a conduit connector for connecting the
supply wires to the unit. Use of rain tight conduit is
recommended.
• Providepowersupplyfortheunitinaccordancewith
the unit wiring diagram and the unit rating plate.
• Overcurrentprotectionmustbeprovidedatthebranch
circuitdistributionpaneland sizedasshown ontheunit
ratinglabelandaccordingtoapplicablelocalcodes.See
Table 11 (or the unit rating plate) for minimum circuit
ampacity and maximum overcurrent protection limits.
• Awiringdiagramislocatedontheinsidecoverofthe
control access panel of the outdoor unit. The installer
should become familiar with the wiring diagram before
making any electrical connections to the outdoor unit.
See Figures 11 & 12.
• Unitsareshippedfromthefactorywiredfor240volt
transformeroperation.For208Voperation,removethe
lead from the transformer terminal marked 240V and
connect it to the terminal marked 208V.
• Connecttheline-voltageleadstotheterminalsonthe
contactor inside the control compartment.
Thermostat/LowVoltageConnections
• Thisunitisdesignedtooperatefroma24VACClass
II control circuit. A single stage cooling / single stage
heating thermostat should be used with this unit.
A 2-stage cooling / 2-stage heating thermostat is
recommended for economizer operation. See Figure
6 (page 12) for typical thermostat connection.
• Thecontrolcircuitwiringmustcomplywiththecurrent
provisions of the NEC (ANSI/NFPA 70) and with
applicable local codes having jurisdiction. Thermostat
connections should be made in accordance with the
instructionssuppliedwiththethermostatandtheindoor
equipment.
• The low voltage wires must be properly connected.
Route 24V control wires through the sealing grommet
near the power entrance. Recommended wire gauge
andwire lengths for typical thermostat connections are
listed in Table 3 (page 12).
• Several thermostat options are available depending
on the accessories installed with the unit. Select a
thermostatthatoperatesinconjunctionwiththeinstalled
accessories.
• Thethermostatshouldbemountedabout5feetabove
theflooronaninsidewall.DONOTinstallthethermostat
on an outside wall or any other location where its
operationmaybeadverselyaffectedbyradiantheatfrom
fireplaces, sunlight, or lighting fixtures, and convective
heat from warm air registers or electrical appliances.
Refertothethermostatmanufacturer’sinstructionsheet
for detailed mounting information.
Checking Heat Anticipator Settings
• Addthecurrentdrawofthesystemheatingcomponents.
OR
• MeasurethecurrentowonthethermostatR-Wcircuit
afterthecirculatingblowermotorhasstarted.Settheheat
anticipator according to the thermostat manufacturer’s
instructions for heat anticipator settings.
COPPERWIRE SIZE — AWG
(1%VoltageDrop)
SupplyWireLength-Feet SupplyCircuit
Ampacity
200 150 100 50
6 8 10 14 15
4 6 8 12 20
4 6 8 10 25
4 4 6 10 30
3 4 6 8 35
3 4 6 8 40
2 3 4 6 45
2 3 4 6 50
2 3 4 6 55
1 2 3 4 60
Wire Size based on N.E.C. for 60° type copper conductors.
Table2.CopperWireSize
12
Table3.ThermostatWireGauge
Thermostat
WireGauge
RecommendedT-StatWire
Length(UnittoT-Stat)
2-Wire
(Heating)
5-Wire
(Heating/Cooling)
24 55 25
22 90 45
20 140 70
18 225 110
Figure6.TypicalThermostatConnection
(FieldSupplied)for1-StageCool/1-StageHeat
C
Y1
R
G
W1
R
C
Y
G
W1
Y2
TERMINAL BLOCK
FURNACE
BOARD
Optional, Refer to
Thermostat Instructions
INDOORTHERMOSTAT
SUB-BASE (TYPICAL)
BlowerSpeed
The blower speed is preset at the factory for proper
fan only, heating, and cooling operation. These factory
settings are listed in Table 8 (page 23). For optimum
system performance and comfort, it may be necessary
to change the factory set speed.
CAUTION:
Toavoidpersonalinjuryorpropertydamage,
makesurethemotorleadsdonotcomeinto
contactwithanyuninsulatedmetalcomponents
oftheunit.
5-Speed ECM Motor
1.Shut off all electrical power to the unit and remove the
blower panel. Locate the orange, red and blue wires
terminatedtotheblowermotor.NOTE:Theorangewire
controls cooling operation while the red wire controls
heating operation. The blue wire controls fan-only
operation.
2.Verify the required speed from the airflow data found
in Table 8.Place appropriate wire on the correct motor
speed tap for the required airflow point.
3.The integrated furnace control can be set to a 2 or 3
speed mode.
NOTE 1: When a Gonly call is received from the
thermostat (indicating a continuous fan mode), the
blower will run the HEAT speed when the 2-SPD mode
isselectedusingthejumperonthecontrolboard(factory
setting).
NOTE2:When3-SPD modeisselected,theFANspeed
is energized and may be different than the heating or
coolingspeed.Ifnojumperispresent,thecontroldefaults
to the 2-SPD HEAT speed mode of operation.A call for
heating or cooling takes priority over fan only mode.
PSC Motor
1.Disconnect all electrical power to the unit and remove
the control panel cover.
2.Placethedesiredblowerlead(forcooling)onthefurnace
board terminal marked COOL.
3.Placethedesiredblowerlead(forheating)onthefurnace
board marked HEAT.The unused leads can be placed
on M1, M2, or M3 on the furnace control board.These
are dead terminals.
NOTE 1: RED = Low Speed, BLUE = Medium Speed,
BLACK=HighSpeed.
NOTE 2: Factory settings require the 024K045 and
030K072modelstohavethesamecoolingandheating
speed.These units will have a jumper from heat to cool
with the factory setting motor speed tap placed on the
jumper.
NOTE3:Whenacallforthefan(G)ismade,thefurnace
board initiates the heat terminal. If heat and cool are
jumpered, the fan, heat and cool will have the same
blower speed.
OptionalFurnaceControlBoard
Connections
Electronic Air Cleaner
The furnace control board provides output terminals
for an optional electronic air cleaner (EAC) that can be
installed in the return air duct of your system. THE EAC
output is energized any time the HEAT or COOL blower
speed is energized. Control ratings are 1.0 Amp. @ 240
VAC. Output connections are made via board terminals
labeled EAC and NEUTRAL.
Humidifier
The furnace control board provides output terminals for
an optional humidifier (HUM) that can be installed on
your system. The HUM output is energized any time the
furnace inducer motor is energized. Control ratings are
1.0 Amp. @ 240 VAC. Output connections are made via
board terminals labeled HUM and NEUTRAL.
Checkallfactorywiringtotheunitswiringdiagram.Inspect
the factory wiring connections to be sure none loosened
during shipping or installation.
13
GAS SUPPLY & PIPING • Allgaspipingmustbeinstalledincompliancewith
localcodesandutilityregulations.Intheabsence
oflocalcodesthegaslineinstallationmustcomply
withthelatesteditionoftheNationalFuelGasCode
ANSIZ223.1orCAN/CGAB149InstallationCodes.
• Some local codes require the installation of a
manualmainshut-offvalveandgroundjointunion
externaltotheunit.Theshut-offvalveshouldbe
readily accessible for service and/or emergency
use. Consult the local utility or gas supplier for
additionalrequirementsregardingplacementofthe
manualmaingasshut-off.SeeFigure7(page15).
• Themanifoldpressuremustbesettotheappropriate
value for your installation. Refer to the Manifold
Pressure Adjustment section (page 17) for
adjustmentinstructions.
• Gaspipingmustneverruninorthroughairducts,
chimneys,gasvents,orelevatorshafts.
• Compoundsusedtosealjointsongaspipingmust
beresistanttotheactionsofLPpropanegas.
• The main gas shutoff valve and main power
disconnect to the unit must be properly labeled
by the installer in case emergency shutdown is
required.
• An1/8inchNPTpluggedtapmustbeinstalledin
thegaslineimmediatelyupstreamofthegassupply
connectiontotheunitforusewhenmeasuringthe
gassupplypressure.Theplugshouldbereadily
accessibleforserviceuse.
• Adriplegshouldbeinstalledintheverticalpipe
runtotheunit.SeeFigure7.
This unit only has right side gas entry. When connecting
the gas, provide clearance between the gas supply line
and the entry hole in the unit’s casing to avoid unwanted
noise and/or damage to the unit. A typical gas service
hookup is shown in Figure 7.
Table 9 (page 24) lists gas pipe capacities for standard
pipe sizes as a function of length in typical applications
based on nominal pressure drop in the line.
LeakCheck
WARNING:
FIRE OR EXPLOSION HAZARD
Nevertestforgasleakswithanopename.
Check all connections using a commercially
available soap solution. A re or explosion
mayresultcausingpropertydamage,personal
injuryorlossoflife.Failuretofollowthesafety
warningsexactlycouldresultinseriousinjury,
deathorpropertydamage.
Afterthegaspipingtotheunitiscomplete,allconnections
mustbetestedforgasleaks.Thisincludespipeconnections
at the main gas valve, emergency shutoff valve and
other gas connectors. A soap and water solution can be
applied on each joint or union using a small paintbrush.
If any bubbling is observed, the connection is not sealed
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly
could result in serious injury or property
damage.
• Installationandservicemustbeperformed
byaqualiedinstaller,serviceagencyorthe
gassupplier.
• Do not store or use gasoline or other
ammablevaporsandliquidsinthevicinity
ofthisoranyotherappliance.
WHAT TO DO IF YOU SMELL GAS
• Donottrytolightanyappliance.
• Donottouchanyelectricalswitch;donot
useanyphoneinyourbuilding.
• Leavethebuildingimmediately.
• Immediatelycallyourgassupplierfroma
neighbor’sphone.Followthegassupplier’s
instructions.
• Ifyoucannotreachyourgassupplier,call
theredepartment.
WARNING:
RISQUED’INCENDIEOUD’EXPLOSION
• Le non-respect des avertissements de
sécurité pourrait entraîner des blessures
graves,lamortoudesdommagesmatériels.
• L’installation et l’entretien doivent être
effectués par un installateur qualié, un
organisme de service ou le fournisseur
de gazstaller, service agency or the gas
supplier.
• Nepasentreposerniutiliserdel’essenceni
d’autresvapeursouliquidesinammables
danslevoisinagedecetappareil,nidetout
autreappareil.
QUEFAIRES’ILYAUNEODEURDEGAZ
• Nepastenterd’allumeraucunappareil.
• Netoucheràaucuninterrupteurélectrique;
n’utiliseraucuntéléphonedanslebâtiment.
• Évacuerl’immeubleimmédiatement.
• Appeler immédiatement le fournisseur de
gazenemployantletéléphoned’unvoisin.
Respecter à la lettre les instructions du
fournisseurdegaz.
• Sipersonnenerépond,appelerleservice
desincendies.
AVERTISSEMENT:
14
adequatelyandmustberetightened.Repeatthetightening
and soap check process until bubbling ceases.
• Ifpressuretestingthegassupplylinesatpressures
greaterthan1/2psig(14inchesWC),theunitmust
bedisconnectedfromthegassupplypipingsystem
topreventdamagetothegasvalve.
• Ifthetestpressureislessthanorequalto1/2psig
(14inchesWC),theunitmustbeisolatedfromthe
gassupplylinebyclosingthemanualshut-offvalve.
HighAltitudeConversion-NaturalGas
Conversion of this unit must be performed by qualified
service personnel, using only approved parts. All
installationsmustbemadeinaccordancewiththeNational
Fuel Gas Code and/or local jurisdiction codes.
WARNING:
Thereductionofinputratingnecessaryforhigh
altitudeinstallationmayonlybeaccomplished
withfactorysuppliedorices.Donotattemptto
drilloutoricesintheeld.Improperlydrilled
orices may cause re, explosion, carbon
monoxidepoisoning,personalinjuryordeath.
High altitude conversion can be field performed by a
simple adjustment of manifold pressure or a change of
the orifices (if necessary) as described on page 17. The
changes required depend on the installation altitude and
the heating value of the gas (based on sea level) which
can be obtained from your local gas utility. The heating
value of gas at high altitude is always lower than the sea
level heating value. Natural Gas heating values listed in
Table 4 (page 15) are based on sea level values.
All factory shipped furnaces are ready to operate using
Natural Gas between zero and 4999 ft. above sea level.
For altitudes between 5,000 and 10,000 feet above sea
level, the unit can be converted by adjusting the unit’s
manifold pressure. See Table 4 for the correct manifold
pressure settings.
NOTE:Ifinstallingthisunitabove2,000feet,theinputrate
mustbereduced4%per1,000feetofaltitude(Example:
12% at 3,000 feet, 16% at 4,000 feet, etc). Deration is
necessary to compensate for low atmospheric pressure
at high altitudes.
LP/PropaneGasConversion
WARNING:
Thisunitwasequippedatthefactoryforuse
withnaturalgas only.Aspecialkit,supplied
bythemanufacturer,isrequiredtoconvertthe
unittooperateonLP/propanegas.Failureto
usetheproperconversionkitcancausere,
explosion,propertydamage,carbonmonoxide
poisoning,personalinjury,ordeath.
IMPORTANTNOTE:WhenconvertingalowNOxunit
fromnaturalgastopropane(LP)gas,itisnecessary
toremovetheNOxbafes.
Conversion of this equipment to LP/Propane gas must
be made by qualified service personnel, using approved
factory parts. Conversion to LP can be accomplished by
replacingthe natural gasorificeswith the appropriate LP/
Propaneorificesandthenadjustingthemanifoldpressure
(page17). Conversion toLP/Propane(sea level and high
altitude)isdetailedintheinstallationinstructionsprovided
with the conversion kit. Pleasefollowtheinstructions
providedineachkit.Approvedconversionkitsarelisted
below:
• The United States LP/Propane Gas Sea Level and
HighAltitudeConversionKit(P/N904404A)isforLP/
propane conversion in the United States at altitudes
between zero and 10,000 ft. above sea level.
• TheCanadianLP/PropaneGasSea Level and High
AltitudeConversionKit(P/N904405A)isforLP/propane
conversions in Canada at altitudes between zero and
4,500 ft. above sea level.
For installations between zero and 4,999 ft. above sea
level, a #54 drill size orifice should be used. Installations
5,000 ft. above sea level require a # 55 drill size orifice.
Table 5 (page 15) lists the correct orifice size to use at
different altitudes.
Afterchangingtheorifices,itisrequiredthatyoumeasure
the gas input rate by clocking the gas meter and using
thelocal gasheating value.See Verifying& Adjustingthe
Firing Rate section on page 17.
15
Ground
Joint
Union
Dripleg
Shut-Off Valve
with 1/8 NPT
plugged tap
Burner
Assembly
Manifold
Some utilities
require Shut-Off
Valve to be
4 to 5 feet
above floor
Automatic Gas Valve
(with manual shut-off)
Figure7.TypicalGasHookup-RightSideEntry
Table4.ManifoldPressureSetting(inWC)forNaturalGas
NaturalGas
HeatingValueof
800to899Btu/cu.ft.
ALTITUDE AbOVE SEA LEVEL
zeroto1,999 2,000to4,999 5,000to5,999 6,000to7,999 8,000to10,000
3.5 3.5 3.5 3.5 3
NaturalGas
HeatingValueof
900to999Btu/cu.ft.
ALTITUDE AbOVE SEA LEVEL
zeroto1,999 2,000to4,999 5,000to5,999 6,000to7,999 8,000to10,000
3.5 3.5 3.5 3.2 2.8
NaturalGas
HeatingValueof
1,000to1,100Btu/cu.ft.
ALTITUDE AbOVE SEA LEVEL
zeroto1,999 2,000to4,999 5,000to5,999 6,000to7,999 8,000to10,000
3.5 3.5 3 2.8 2.5
LPHeatingValue
of2,500Btu/ft.3
ALTITUDE AbOVE SEA LEVEL
zero to
1,999
2,000to
2,999
3,000to
4,999
5,000to
5,999
6,000to
7,999
8,000to
10,000
Manifold Pressure 9.8 - 10 8.8 - 9.0 8.3 - 8.5 9.8 - 10 8.8 - 9.0 8.3 - 8.5
Orifice Size 54 54 54 55 55 55
NOTE: Manifold pressure based on sea level LP heating value of 2,500 Btu/cu. ft.3
Table5.ManifoldPressureSetting(inWC)&OriceSizeforLPGas
16
START UP & ADJUSTMENTS
Pre-StartCheckList
√Verify the unit is level and allows condensate to drain.
√Verify all clearance requirements are met and there is
free airflow to and from the outdoor coil.
√Verifythattheductworkissealedtopreventairleakage
and air filter is installed.
√Verify that the line voltage power leads are securely
connected and the unit is properly grounded.
√Verifythatthelowvoltagewiresaresecurelyconnected
to the correct terminals in the low voltage area of the
control box.
√Verifythatthegaslineservicepressuredoesnotexceed
10.0 inches WC (0.36 psig), and is not less than 4.5
inches WC (0.16 psig) for natural gas. For LP gas the
line service pressure must not exceed 14 inches WC
(0.51 psig) and must not be less than 11.0 inches WC
(0.40 psig).
√Verify that the flame roll-out control is closed. If
necessary,presstheredbuttontoresetthecontrol.DO
NOTinstallajumperwireacrossthecontroltodefeatits
function. If the control reopens upon start-up, DO NOT
reset the control without identifying and correcting the
fault condition which caused the control to trip.
√Verify that the gas line has been purged and all
connections are leak tight.
√Verifythatallexteriorpanelsarereplacedandsecurely
fastened.
√Verify that the outdoor fan turns freely.
√Verify that the power supply branch circuit overcurrent
protection is sized properly.
√Verify that the thermostat is wired correctly. The
thermostat function switch should be set to OFF and
the thermostat fan switch should be set to AUTO.
Start-UpProcedure
WARNING:
Ifthisunitisequippedwithcrankcaseheaters,
allow 24 hrs for heating of the refrigerant
compressor crankcase prior to start up or
anytimethepowerhasbeenremovedformore
than 12 hrs. Failure to comply may result in
damage or cause premature failure of the
system.
Air Circulation
Leave the thermostat system mode on OFF, and set the
fan mode to ON. Blower should run continuously. Check
the air delivery at the supply registers and adjust register
openingsfor balancedair distribution.Examine ductwork
for leaks or obstruction if insufficient air is detected. Set
the thermostat fan mode to AUTO. The blower should
stop running.
System Cooling
1.Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Gradually lower the thermostat
temperaturesetpointbelowroomtemperatureandverify
the compressor, fan and indoor blower energize.
2.Feel the air being circulated by the indoor blower and
verifythatitiscoolerthanambienttemperature.Listenfor
anyunusualnoises.Ifunusualsoundsoccur,determine
the source of the noise and correct as necessary.
3.Allowthe cooling system tooperateforseveralminutes
and then set the temperature selector above room
temperature. Verify the fan and compressor cycle off
with the thermostat. NOTE: The blower will also stop
after a 40 second delay.
System Heating
1.Set the thermostat to the lowest setting.
2.Followtheproceduresgivenontheoperatinginstruction
label,thismanualorattachedinsidethelouveredcontrol
access panel.
3.Set the thermostat above room temperature and verify
the Operating Sequence.See page 18.
4.Verify that the compressor and outdoor fan motor are
not energized.
5.After the unit has run for approximately five minutes,
set the thermostat below room temperature and verify
the shutdown sequence;steps 10 -12 in the Operating
Sequence section (pages 18-19).
Verifying&AdjustingTemperatureRise
Verify the temperature rise through the unit is within the
range specified on the unit data label. Temperature rises
outsidethespecifiedrangecouldresultinprematureheat
exchanger failure.
1.Placethermometersinthereturnandsupplyair stream
asclosetotheunitaspossible.Thethermometeronthe
supplyairsidemustbeshieldedagainstdirectradiation
from the heat exchanger to avoid false readings.
2.Adjust all registers and duct dampers to the desired
position. Run the unit for 10 to 15 minutes before
taking any temperature readings. The temperature
rise is the difference between the supply and return air
temperatures.
NOTE:Fortypicalductsystems, thetemperaturerisewill
fall within the range specified on the data label (with the
blowerspeedatthefactoryrecommendedsetting)shown
inTable8(page23).Ifthemeasuredtemperaturerisefalls
outsidethespecifiedrange,itmaybenecessarytochange
the blower speed. Lowering the blower speed increases
the temperature rise and a higher speed decreases the
temperature rise.
The unit is equipped with a multi speed motor. On units
withECMtypemotors,speedselectionismadebymoving
the leads on the blower motor terminal block. If the unit
is equipped with a PSC type motor, speed selection is
made by moving the leads on the furnace control board.
The speed taps for adjusting the motor speed are shown
in the unit wiring diagram or Figures 11 & 12 (pages 27
& 28). Refer to the Blower Speed section (page12) for
additional information.
17
The integrated control starts the circulating air blower
30 seconds after the gas valve is opened. The control is
factorywiredtoturntheblowermotoroff90-135seconds
after the gas valve is closed.
ECM Motors: The heating blower off delay is factory
set at 90 seconds. An additional 45 second off delay is
programmed into the ECM blower motor for a total of
135 seconds.
PSC Motors: A moveable jumper is provided to select
between four heat blower off delay times - 60, 90, 120,
and180seconds.Thecontrolisshippedwiththejumpers
in the 120 second position. The control defaults to 90
seconds if the jumper is not attached.
Verifying&AdjustingFiringRate
CAUTION:
Donotre-drilltheburnerorices.Iftheorice
sizemustbechanged,useonlyneworices.
The firing rate must be verified for each installation to
prevent over-firing of the unit. Theringratemustnot
exceed the rate shown on the unit data label. To
determinetheringrate,followthestepsbelow:
1.Obtainthegasheatingvalue(HHV)fromthegassupplier.
2.Shut off all other gas fired appliances.
3.Start the unit in heating mode and allow it to run for at
least 3 minutes.
4.Measurethetime(inseconds)requiredforthegasmeter
to complete one revolution.
5.Convert the time per revolution to cubic feet of gas per
hour using Table 10 (page 24).
6.Multiply the gas flow rate in cubic feet per hour by the
heating value of the gas in Btu per cubic foot to obtain
the firing rate in Btu per hour. See Example.
Example:
• Timefor1revolutionofagasmeterwitha1cubic
foot dial = 40 seconds.
• FromTable10,read90cubicfeetgasperhour.
• Localheatingvalueofthegas(obtainedfromgas
supplier) = 1,040 Btu per cubic foot.
• Inputrate=1,040x90=93,600Btuh.
7.Adjustthemanifoldpressureifnecessary.SeeManifold
Pressure Adjustment above.For additional information
about elevations above 2,000 feet, see page 14.
ManifoldPressureAdjustment
The manifold pressure must be set to the appropriate
valueforyourinstallation.Toadjustthemanifoldpressure:
1.Obtaintherequiredmanifoldpressuresetting.UseTable
4 (page 15) for natural gas or Table 5 for LP/propane
gas.
NOTE: The values listed in the tables are based on
sea level values. At higher altitudes, the heating value
of gas is lower than the sea level heating value.
2.Remove the regulator capscrew (Figure 8) from the
INLET side of the regulator.
3.Slowly turn the adjustment screw inside the regulator
to obtain the appropriate manifold pressure.
NOTE: Turning the screw clockwise increases the
pressure and turning the screw counter-clockwise
decreases the pressure.To prevent backing the screw
all the way out from the valve, turn the screw slowly.
4.Replace and tighten the regulator capscrew over the
adjustment screw.
Capscrew
Inlet
Pressure
Tap
Manifold
Pressure
Tap
Figure8.RegulatorCapscrew&TapLocations
VerifyingOver-TemperatureLimitControl
Operation
1.Verify thelouvered controlaccess panelis inplace and
that there is power to the unit.
2.Block the return airflow to the unit by installing a close-
off plate in place of or upstream of the filter.
3.Set the thermostat above room temperature and verify
the units operating sequence (pages 18 - 19).
NOTE: The over-temperature limit control should turn off
thegasvalvewithinapproximatelyfourminutes(exacttime
depends on the efficiency of the close-off when blocking
thereturnair).Thecirculatingairandcombustionblowers
should continue to run when the over-temperature limit
control switch opens.
4.Remove the close-off plate immediately after the over-
temperature limit control opens. If the unit operates
for more than four minutes with no return air, set the
thermostat below room temperature, shut off power to
theunit,andreplace theover-temperaturelimit control.
18
OPERATING SEQUENCE
The operating sequences for the heating, cooling, and
fan modes are described below. Refer to the field and
unit wiring diagrams (Figures 11 & 12, pages 27 & 28).
HeatingMode
1.On a call for heat, the thermostat closes and applies
24 VAC to the W terminal of the control board.
2.The control board checks for continuity on the 24 VAC
limit control circuit through the over-temperature limit
switch andflame rollout switchin series.If an openlimit
is detected, the control board will energize the inducer
blower. All other system functions will be inoperable
until the limit circuit closes.While the limit is open, the
red LED will pulse at a rate of 1 blink per unit time.
3.The furnace control checks for continuity (24 VAC)
across the pressure switch. If the pressure switch is
closed, the heat mode sequence will not continue.If it
remains closed for 10 seconds, the red LED will flash
3 times repetitively until the fault condition clears.
4.The inducer energizes (if pressure switch is open).
5.The pressure switch will close. If the pressure switch
doesnot closeafter 10seconds,thefaultLEDwill flash
2 times and the inducer will continue to run until the
switch is closed.
6.The inducer will pre-purge for 30 seconds and then the
igniterwillstartitswarm-upasfollows:
Initial Power up: After 30 seconds of igniter warm-up,
thegas valves(24VAC) willopen.Theigniter circuitwill
stay energizedfor3 seconds after the gas valveopens.
After Initial Power up: The control has a programmed
adaptive ignition feature which varies the warm-up
periodasfollows:Ifignitionissuccessfulthewarm-up
is reduced by 3 seconds on each subsequent call for
heat until ignition failure occurs. Upon ignition failure,
the warm-up is increased by 3 seconds on the next try.
If successful, the timing remains fixed at this level. In
general, whenever ignition failure occurs the warm-up
interval is increased by 3 seconds on the next try.And
if successful, it remains there.Minimum and maximum
warm-up time limits are set at 6 and 54 seconds.
7.The furnace control must prove flame via the flame
sensor 5 seconds after the gas valves open.If flame is
sensed, burners are on and the igniter cools off. If no
flame is sensed, the gas valve closes immediately and
the inducer continues to run. A second trial for ignition
(step 6) begins.If no flame is sensed on the fifth try for
ignition, the furnace control is locked and the red LED
will blink 4 times repetitively. The thermostat must be
opened for at least ten seconds to reset the furnace
control after a lock out. Otherwise, the furnace will
attempt another ignition sequence in 1 hour.
8.After the gas valve opens (30 seconds), the blower will
ramp to the selected airflow and continues to run.
9.Whenthethermostathasbeensatisfied,theWterminal
on the integrated control is de-energized.
10.Thegasvalvecircuitisde-energizedandthegasvalve
closes.
VerifyingBurnerOperation
WARNING:
Uninsulatedlivecomponentsareexposedwhen
louveredcontrolaccesspanelisremoved.
1.Remove the louvered control access panel and verify
there is power to the unit.
2.Set thermostat above room temperature and observe
the ignition sequence.NOTE:The burner flame should
carry over immediately between all burners without
liftingoff,curling,orfloating.Theflamesshouldbeblue,
without yellow tips. Make sure the flame is drawn into
the center of the heat exchanger tube. In a properly
adjusted burner assembly, the flame bends down and
to the right at the end of the heat exchanger tube.The
end of the flame will be out of sight around the bend.
3.Aftervalidatingflamecharacteristics,setthethermostat
below room temperature and verify the burner flame
extinguishes completely.
RefrigerantCharging
WARNING:
These units are shipped fully charged with
R-410Arefrigerantandreadyforinstallation.
Whenasystemisinstalledaccordingtothese
instructions,norefrigerantchargingisrequired.
Ifrepairsmakeitnecessaryforevacuationand
charging,itshouldonlybedonebyqualied,
trainedpersonnelthoroughlyfamiliarwiththis
equipment.Somelocalcodesrequirelicensed
installation/service personnel to service this
type of equipment. Under no circumstances
should the owner attempt to install and/or
servicethisequipment.Failuretocomplywith
thiswarningcouldresultinpropertydamage,
personalinjury,ordeath.
CAUTION:
ThisunitusesR-410Arefrigerant.DONOTuse
anyotherrefrigerantinthisunit.Useofanother
refrigerantwilldamagetheunit.
The system refrigerant charge can be checked and
adjusted through the service ports provided at the front
panel. Use only gauge lines which have a “Schrader”
depression device present to actuate the valve. Draw a
vacuum on gauge lines to remove air before attaching
themtotheserviceportsontheunit.Refrigerantcharging
must be done by qualified personnel familiar with safe
and environmentally responsible refrigerant handling
procedures.
19
11.The inducer motor will continue to run for the post
purge period of 25 seconds.
12.The main blower will continue to run for the BLOWER
OFF delay of 90 - 135 seconds.
13.After the BLOWER OFF timer has been satisfied, the
integrated control de-energizes the main circulating
blower circuit.
CoolingMode
1.On a call for cooling, the thermostat closes applying 24
VAC to the G& Yterminals on the low voltage terminal
strip.
2.The Gterminal applies 24VAC to the Gterminal of the
integratedcontrol,energizingthemaincirculatingblower
circuit at the cooling speed.
3.The Yterminal applies 24VAC to the contactor.
4.When the thermostat is satisfied, the contactor and
integratedcontrolde-energize.Compressorandoutdoor
fan will stop running.
5.The circulating blower motor de-energizes after a 40
second delay.
FanMode
1.On a call for fan only operation, the thermostat applies
24 VAC to the Gterminal connected to the Gterminal
of the integrated control.
2a.ECM Motors: The circulating blower is energized
immediately at the heating speed if 2-SPD is selected
or fan only speed if 3-SPD is selected on the control.
2b.PSC Motors: The circulating blower is energized
immediately on the heat speed.
NOTE: If a call for heat occurs, the circulating blower de-
energizes prior to normal heating cycle.
EQUIPMENT MAINTENANCE
ELECTRICALSHOCK,FIREOREXPLOSION
HAZARD
Failuretofollowsafetywarningsexactlycould
resultinseriousinjuryorpropertydamage.
Improperservicingcouldresultindangerous
operation,serious injury,deathorproperty
damage.
• Beforeservicing,disconnectallelectrical
powertofurnace.
• Whenservicingcontrols,labelallwiresprior
todisconnecting.Reconnectwirescorrectly.
• Verifyproperoperationafterservicing.
WARNING:
RISQUEDECHOCÉLECTRIQUE,D’INCENDIE
OUD’EXPLOSION
Le non-respect des avertissements de sécurité
pourraitentraîner
unfonctionnementdangereux
del’appareil,
desblessuresgraves,lamortou
desdommagesmatériels.
Unentretein incorrectpourrait entraînerun
fonctionnementdangereuxdel’appareil,des
blessuresgraves,lamortoudesdommages
matériels
• Couper toute alimentation électrique au
générateurd’airchaudavantde prodéder
auxtravauxd’entretein.
• Aumomentdel’entretiendescommandes,
étiqueteztousleslsavantdelesdébrancher.
S’assurerdelesraccordercorrectement.
•S’assurer que l’appareil fonctionne
adéquatementaprésl’entretien.
AVERTISSEMENT:
CAUTION:
Usecarewhenremovingpartsfromthisunit.
Personal injury can result from sharp metal
edgespresentinallequipmentofsheetmetal
construction.
Proper maintenance is important to achieve optimum
performance from the system. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
localdealerabouttheavailabilityofmaintenancecontracts.
Routinemaintenanceshouldincludethefollowing:
REPLACEMENT PARTS
Replacement parts are available through all Nordyne
distributors.Please have the complete model and serial
number of the unit when ordering replacement parts.
Electrical:
• Capacitors • PressureSwitches
• Compressors • Relays
• Contactors • TemperatureLimitSwitches
• GasValves • Thermostats
• IgnitionControls • TimeDelayRelays
• Ignitors/FlameSensors • Transformers
Motors:
• BlowerMotor
• FanMotor
• InducerBlowerMotor
Components:
• Blower Assembly • FanGrille
• Burner Manifold • Filter/Driers
• Burners/Orifices • Gaskets
• Cabinet Panels • HeatExchanger
• Expansion Valves
20
CAUTION:
Theunitshouldneverbeoperatedwithouta
lterinthereturnairsystem.Replacedisposable
lterswiththesametypeandsize.
• Inspect,cleanorreplaceairltersatthebeginningof
each heating and cooling season, or more frequently
if required.
• Inspectthecondensatedrainandoutdoorcoilatthe
beginningofeachcooling season.Removeany debris.
Cleantheoutdoorcoilandlouversasnecessaryusinga
mild detergent and water. Rinse thoroughly with water.
• Inspecttheelectricalconnectionsfortightnessatthe
beginning of each heating and cooling season.
• Theblowercompartmentshouldbecleanedmonthly
duringtheheatingandcoolingseasonstoremoveanydirt
andlintthatmayhaveaccumulatedinthecompartment
or on the blower and motor. Buildup of dirt and lint on
the blower and motor can create excessive loads on
the motor resulting in higher than normal operating
temperatures and possible shortened service life.
• Maintainheatexchangerandburners.Theunitshould
operateformanyyearswithoutexcessivescalebuildup
intheheatexchanger,however,theheatexchanger,the
vent system, and the burners should be inspected and
cleaned(ifrequired)byaqualifiedservicemanannually
toensurecontinuedsafeoperation.Particularattention
must be given to identify deterioration from corrosion
or other sources.
• Themotorsforthecirculatingairblower,outdoorfan,
andcombustionblowerarepre-lubricatedatthefactory.
No further oiling is required for the life of this product.
• Inspectandcleanthescreenoftheventcoverassembly
at the beginning of each heating and cooling season.
CleaningofHeatExchanger
WARNING:
Holesintheheatexchangercancauseproducts
ofcombustiontoenterthehome.Replacethe
heatexchangerifleaks arefound.Failureto
prevent products of combustion from being
circulated into the living space can create
potentially hazardous conditions including
carbonmonoxidepoisoningthatcouldresult
inpersonalinjuryordeath.
If the heat exchanger must be cleaned due to soot or
scale build up, follow the steps below.
1.Shut off the gas supply to the unit at the meter or at the
manual valve in the gas supply piping.
2.Turn off all power to the unit and set the thermostat to
the lowest temperature setting.
3.Remove the louvered access panel from the unit.
4.Turn the gas control knob (gas valve) to the OFF
position.See Figure 10 (page 25) for gas valve shut off
instructions.
5.Disconnect the wires from the gas valve, ignitor, flame
sensor, combustion air motor, flame roll-out control,
over-temperature limit switch, and pressure switch.
6.Remove the silicone rubber tube from the collector pan
to the pressure switch.
7.Remove 4 nuts securing the combustion blower to the
collector pan. Remove the combustion blower.
8.Remove all screws securing the collector pan to the
unit. Remove the collector pan from the unit.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenchesbeusedwhenlooseningortightening
nuts.Donotovertighten!
9.Using 2 wrenches, separate the ground-joint union in
the gas supply piping at the unit.
10.Remove the piping between the gas valve and the
ground-joint union, if necessary.
11.Remove the screws that secure the burner assembly
in place and the burner assembly. bE EXTREMELY
CAREFUL NOTTO DAMAGETHE IGNITORWHILE
REMOVING THE bURNER ASSEMbLY.
12.Attach a round wire brush to a length of high grade
stainless steel cable, such as drain clean-out cable.
Attach the other end of the spring cable to a variable
speedreversibledrill.Slowlyinsertandrotatethecable
intothetopportionofthe heatexchanger.Operatethe
drill alternatingbetween forwardand reverse,working
the cable in and out several times to obtain sufficient
cleaning.Repeatthisprocessateachexchangertube.
13.Remove all loosened debris from the heat exchanger
tubes using high pressure air and vacuum cleaner.
14.Using a light, check the condition of the upper and
lower sections of the heat exchanger tube.
15.Inspect the burners and if necessary, clean them
carefully with a soft wire brush and/or the nozzle of a
vacuumcleaner.DONOTDAMAGETHEIGNITOROR
FLAMESENSORWHILECLEANINGTHEbURNER.
16.Replace all the parts in reverse order from which they
were removed.
17.Follow the operating instructions found on the right
side door and the User’s Information Manual to return
the unit to operation.
CleaningofBurners
If the burners must be cleaned, follow the steps below.
1.Shut off the gas supply to the unit either at the meter
or at a manual valve in the supply piping.
2.Turn off all power to the unit and set the thermostat to
the lowest temperature setting.
3.Remove the louvered control access panel from the
unit.
4.Turn the gas control knob to the OFF position. See
Figure 10 (page 25) for gas valve shut off instructions.
5.Disconnect the wires from the gas valve, ignitor, and
flame sensor.
This manual suits for next models
1
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