Goodman Mfg VC8 User Manual

NSTALLATION

NSTRUCTIONS

(CATEGORY I )

Installer: Affix all manuals adjacent to the unit.

These furnaces comply with requirements embodied in the American National Standard / National Standard of Canada ANSI Z21.47·CSA-

2.3 Gas Fired Central Furnaces.

RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.

FOR

*(D, M)VC8 G

URNACE

ATTENTION INSTALLING PERSONNEL

As a professional installer, you have an obligation to know the product better than the customer.

This includes all safety precautions and related items.

Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual.

Pay special attention to all safety warnings. Often during installation or repair, it is possible to place yourself

in a position which is more hazardous than when the unit is in operation.

Remember, it is your responsibility to install the product safely and to know it well enough

to be able to instruct a customer in its safe use.

Safety is a matter of common sense...a matter of thinking before acting.

Most dealers have a list of specific, good safety practices...follow them.

The precautions listed in this Installation Manual are intended as supplemental to existing practices.

However, if there is a direct conflict between existing practices and the content of this manual,

the precautions listed here take precedence.

NOTE: Please contact your distributor or our website for the applicable Specification Sheet

referred to in this manual.

WARNING

OODMANWILLNOTBERESPO NSIBLEFORANYINJURYORPROPERTY

DAMAGEARISINGFROMIMPROPERSERVICEORSERVICEPROCEDURES

FYOUINSTALLORPERFORMSERVICEONTHISUNIT,YOUASSUME

RESPO NSIBILITYFORANYPERSONALINJURYORPROPERTYDAMAGE

WHICHMAYRESULT

INSTALLORSERVICEHEATINGANDAIRCONDITIONINGEQUIPMENT

.M

ANYJURISDICTIONSREQUIREALICENSETO

 .



IO-361C

5151 San Felipe Suite 500 • Houston, TX 77056

www.goodmanmfg.com • www.amana-hac.com

12/10

Table of Contents

AFETY PRECAUTIONS ................................................................................................................................. 4

DDITIONAL SAFETY CONSIDERATIONS ...................................................................................................... 5

HIPPING INSPECTION ........................................................................................................................... 5

S E

LECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ..................................................................................... 5

O THE INSTALLER .............................................................................................................................. 5

T I

MPORTANT NOTE TO THE OWNER REGARDING PRODUCT WARRANTY ............................................................... 5

RODUCT DESCRIPTION ............................................................................................................................... 6

EATURES .......................................................................................................................................... 6

PRODUCT APPLICATION ............................................................................................................................... 6

LOCATION REQUIREMENTS AND CONSIDERATIONS ................................................................................................ 7

LEARANCES AND A CCESSIBILITY ............................................................................................................ 8

C H

ORIZONTAL INSTALLATION (*MVC8 MODELS O NLY).................................................................................. 8

URNACE SUSPENSION .......................................................................................................................... 8

F E

XISTING FURNACE REMOVAL ................................................................................................................ 8

THERMOSTAT LOCATION ........................................................................................................................ 9

COMBUSTION AND VENTILATION A IR REQUIREMENTS ............................................................................................ 9

CATEGORY I VENTING (VERTICAL VENTING) .................................................................................................... 10

EXTERIOR MASONRY CHIMNEYS (CATEGORY I FURNACES ONLY) .......................................................................... 11

HECKLIST SUMMARY .........................................................................................................................11

HECK 1 - PROPER CHIMNEY TERMINATION. ............................................................................................. 12

CHECK 2 - ANY SOLID OR LIQUID FUEL APPLIANCES VENTED INTO THIS CHIMNEY CHANNEL ...................................... 12

CHECK 3 - CHIMNEY CROWN CONDITION. ................................................................................................ 13

CHECK 4 - DEBRIS IN CLEANOUT .......................................................................................................... 13

CHECK 5 - LINER CONDITION................................................................................................................ 13

CHECK 6 - DILUTION AIR. ................................................................................................................... 13

CHECK 7 - COMPLETE THE INSTALLATION. ............................................................................................... 13

FIX 1 - LINER TERMINATION ................................................................................................................. 14

FIX 2 -CHANGE V ENTING A RRANGEMENTS ............................................................................................... 14

FIX 3 - REBUILD THE CROWN ............................................................................................................... 14

FIX 4 - RELINING .............................................................................................................................. 14

ELECTRICAL CONNECTIONS ........................................................................................................................ 15

WIRING HARNESS .............................................................................................................................. 15

115 VOLT L INE C ONNECTIONS ............................................................................................................. 15

JUNCTION BOX RELOCATION ................................................................................................................ 16

24 VOLT T HERMOSTAT WIRING ............................................................................................................ 16

SINGLE-STAGE HEATING THERMOSTAT APPLICATION .................................................................................. 17

24 VOLT D EHUMIDISTAT WIRING ........................................................................................................... 17

FOSSIL FUEL A PPLICATIONS ................................................................................................................ 17

115 VOLT LINE CONNECTION OF A CCESSORIES (H UMIDIFIER AND ELECTRONIC A IR CLEANER) ............................. 18

24 VOLT HUMIDIFIER ......................................................................................................................... 18

GAS SUPPLY AND P IPING ........................................................................................................................... 18

HIGH ALTITUDE DERATE ...................................................................................................................... 18

PROPANE GAS CONVERSION ................................................................................................................ 18

GAS PIPING CONNECTIONS .................................................................................................................. 18

UPFLOW INSTALLATIONS ..................................................................................................................... 20

COUNTERFLOW INSTALLATIONS .............................................................................................................. 20

GAS PIPING C HECKS ......................................................................................................................... 20

PROPANE GAS TANKS AND PIPING ......................................................................................................... 21

CIRCULATING A IR AND FILTERS .................................................................................................................... 21

CHECKING DUCT STATIC ..................................................................................................................... 22

FILTERS - READ THIS SECTION BEFORE INSTALLING THE RETURN A IR DUCTWORK ............................................ 22

UPRIGHT INSTALLATIONS ..................................................................................................................... 23

Table of Contents

CIRCULATION A IR FILTERS ................................................................................................................... 23

HORIZONTAL INSTALLATIONS ................................................................................................................ 23

TART-UP PROCEDURE A ND ADJUSTMENT ....................................................................................................... 23

HEAT A NTICIPATOR SETTING ................................................................................................................ 23

FURNACE OPERATION ......................................................................................................................... 23

GAS SUPPLY PRESSURE MEASUREMENT .................................................................................................. 23

AS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT ....................................................................... 25

GAS INPUT RAT E M EASUREMENT (NATURAL GAS ONLY) ............................................................................ 25

EMPERATURE RISE ........................................................................................................................... 26

CIRCULATOR BLOWER SPEEDS ............................................................................................................. 26

BLOWER HEAT OFF DELAY TIMINGS ...................................................................................................... 28

COMFORTNET™ SYSTEM ......................................................................................................................... 29

OVERVIEW ....................................................................................................................................... 29

IFRLOW CONSIDERATIONS .................................................................................................................. 29

A F

OSSIL FUEL A PPLICATIONS ................................................................................................................ 30

CTK01AA WIRING .......................................................................................................................... 30

COMFORTNET SYSTEM A DVANCED FEATURES .......................................................................................... 30

NETWORK TROUBLESHOOTING ................................................................................................................ 33

SYSTEM TROUBLESHOOTING ................................................................................................................. 33

NORMAL SEQUENCE OF OPERATION .............................................................................................................. 34

POWER UP ...................................................................................................................................... 34

HEATING MODE ................................................................................................................................. 34

COOLING MODE ................................................................................................................................35

FAN ONLY MODE .............................................................................................................................. 35

OPERATIONAL CHECKS .............................................................................................................................. 35

SAFETY CIRCUIT D ESCRIPTION .................................................................................................................... 36

INTEGRATED C ONTROL MODULE ............................................................................................................. 36

PRIMARY LIMIT ................................................................................................................................36

AUXILIARY LIMIT ............................................................................................................................... 36

ROLLOUT LIMIT ................................................................................................................................36

PRESSURE SWITCHES ......................................................................................................................... 36

FLAME SENSOR ................................................................................................................................36

TROUBLESHOOTING ................................................................................................................................... 36

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................................................................................... 36

DIAGNOSTIC CHART........................................................................................................................... 36

FAULT RECALL ................................................................................................................................37

RESETTING FROM LOCKOUT ................................................................................................................ 37

MAINTENANCE ......................................................................................................................................... 37

ANNUAL INSPECTION ........................................................................................................................... 37

FILTERS .......................................................................................................................................... 37

BURNERS ......................................................................................................................................... 38

INDUCED DRAFT AND CIRCULATOR B LOWERS ............................................................................................ 38

FLAME SENSOR (QUALIFIED SERVICER ONLY) .......................................................................................... 38

FLUE PASSAGES (QUALIFIED SERVICER ONLY) ......................................................................................... 38

BEFORE LEAVING AN INSTALLATION ............................................................................................................... 38

REPAIR AND REPLACEMENT PARTS .............................................................................................................. 38

TROUBLESHOOTING CHART ......................................................................................................................... 39

STATUS CODES ....................................................................................................................................... 44

AIR FLOW DATA .................................................................................................................................... 45

DIP SWITCHES ........................................................................................................................................ 45

*MVC8___AA WIRING DIAGRAM ............................................................................................................. 46

*MVC8___AB, *DVC8___AA WIRING DIAGRAM ..................................................................................... 47

AFETY

RECAUTIONS

Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. To ensure proper installation and operation, thoroughly read this manual for specifics pertaining to the installation and application of this product.

WARNING

TO

PREVENTPERSONALINJURYORDEATHDUETOIMPROPER

INSTALLATION,ADJUSTMENT,ALTERATION,SERVICEORMAINTENANCE

REFERTOTHISMANUAL

INFORMATION,CONSULTAQUALIFIEDINSTALLER,SERVICERAGENCYOR

THEGASSUPPLIER

.FOR

ADDITIONALASSISTANCEOR



WARNING

IF

THEINFORMATIONINTHESEINSTRUCTIONSISNOTFOLLOWED EXACTLY,AFIREOREXPLOSIONMAYRESULTCAUSINGPROPERTY DAMAGE

,

PERSONALINJURYORLOSSOFLIFE

DO

NOTSTOREORUSEGASO LINEOROTHERFLAMMABLEVAPORSAND

LIQUIDSINTHEVICINITYOFTHISORANYOTHERAPPLIANCE



WHATTODOIFYOUSMELLGAS:

ONOTTRYTOLIGHTANYAPPLIANCE



ONOTTOUCHANYELECTRICALSWITCH;DONOTUSEANYPHONE

INYOURBUILDING



MMEDIATELYCALLYOURGASSUPPLIERFROMANEIGHBOR’S

PHONE

.F

FYOUCANNOTREACHYOURGASSUPPLIER,CALLTHEFIRE



DEPARTMENT

NSTALLATIONANDSERVICEMUSTBEPERFORMEDBYAQUALIFIED

INSTALLER,SERVICEAGENCYORTHEGASSUPPLIER

OLLOWTHEGASSUPPLIER’SINSTRUCTIONS



,



CARBON MONOXIDE POISONING HAZARD

Special Warning for Installation of Furnace or Air Handling Units in Enclosed Areas such as Garages, Utility Rooms or Parking Areas

Carbon monoxide producing devices (such as an automobile, space heater, ga s water heate r, etc.) should not be operat ed in enclosed areas such as unventilated garages, utility rooms or parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions. If a furnace or air handler is installed in an enclosed area such as a garage, utility room or parking area and a carbon monoxide producing device is o perated therein, there must be adequate, direct outside ventilation.

This ventilation is necessary to avoid the danger of CO poisoning which can occur if a carbon mono xide producing device continues to operat e in the enclo sed area. Carb on monoxide emissions ca n be (re)circu lated throughout the structure if the furnace or air handler is operating in any mode.

CO can cause serious illness including permanent brain damage or death.

B10259-216

WARNING

HISPRODUCTCONTAINSORPRODUCESACHEMICALORCHEMICALS WHICHMAYCAUSESERIOUSILLNESSORDEATHANDWHICHARE KNOWNTOTHESTATEOFCALIFORNIATOCAUSECANCER,BIRTH DEFECTSOROTHERREPRODUCTIVEHARM



WARNING

EATINGUNITSHOULDNOTBEUTILIZEDWITHOUTREASONABLE

ROUTINE,INSPECTION,MAINTENANCEANDSUPERVISION

BUILDINGINWHICHANYSUCHDEVICEISLOCATEDWILLBEVACANT

CARESHOULDBETAKENTHATSUCHDEVICEISROUTINELYINSPECTED

MAINTAINEDANDMONITORED.INTHEEVENTTHATTHEBUILDING

MAYBEEXPOSEDTOFREEZINGTEMPERATURESANDWILLBEVACANT

ALLWATER‐BEARINGPIPESSHOULDBEDRAINED,THEBUILDINGSHOULD

BEPROPERLYWINTERIZED,ANDTHEWATERSOURCECLOSED.INTHE

EVENTTHATTHEBUILDINGMAYBEEXPOSEDTOFREEZING

TEMPERATURESANDWILLBEVACANT,ANYHYDRONICCOILUNITS

SHOULDBEDRAINEDASWELLAND,INSUCHCASE,ALTERNATIVEHEAT

SOURCESSHOULDBEUTILIZED

.IF



THE

,



,



,



WARNING

TO

PREVENTPOSSIBLEPROPERTYDAMAGE,PERSONALINJURYOR DEATHDUETOELECTRICALSHOCK,THEFURNACEMUSTBELOCATEDTO PROTECTTHEELECTRICALCOMPONENTSFROMWATER



WARNING

HOULDOVERHEATINGOCCURORTHEGASSUPPLYFAILTOSHUTOFF TURNOFFTHEMANUALGASSHUTOFFVALVEEXTERNALTOTHE FURNACEBEFORETURNINGOFFTHEELECTRICALSUPPLY

,



WARNING

OSSIBLEPROPERTYDAMAGE,PERSONALINJURYORDEATHDUETO

FIRE,EXPLOSION,SMOKE,SOOT,CONDENSATION,ELECTRICALSHOCK

ORCARBO NMONOXIDEMAYRESULTFROMIMPROPERINSTALLATION

REPAIROPERATION,ORMAINTENANCEOFTHISPRODUCT



,

WARNING

TO

PREVENTPERSONALINJURYORDEATHDUETOIMPROPER

INSTALLATION,ADJUSTMENT,ALTERATION,SERVICEORMAINTENANCE



REFERTOTHISMANUAL

INFORMATION,CONSULTAQUALIFIEDINSTALLER,SERVICERAGENCYOR

THEGASSUPPLIER

.FOR

ADDITIONALASSISTANCEOR



,



WARNING

HISUNITMUSTNOTBEUSEDASA“CONSTRUCTIONHEATER”DURING

THEFINISHINGPHASESOFCONSTRUCTIONONANEWSTRUCTURE

TYPEOFUSEMAYRESU LTINPREMATUREFAILUREOFTHEUNITDUETO

EXTREMELYLOWRETU RNAIRTEMPERATURESANDEXPOSURETO



CORROSIVEORVERYDIRTYATMOSPHERES



.T

HIS



RODUCT

PPLICATION

WARNING

TO

PREVENTPERSONALINJURYORDEATHDUETOASPHYXIATION,THIS

FURNACEMUSTBECATEGORY

ATEGORY

C P

ROVISIONSMUSTBEMADEFORVENTINGCOMBUSTIONPRODUCTS

OUTDOORSTHROUGHAPROPERVENTINGSYSTEM

FLUEPIPECOULDBEALIMITINGFACTORINLOCATINGTHEFURNACE

III

VENTING

I

VENTED

.DO

NOTVENTUSING

.THE

LENGTHOF



ADDITIONAL S AFETY C ONSIDERATIONS

• This furnace is approved for Category I Venting only.

• Provisions must be made for venting combustion products outdoors through a proper venting system. The length of flue pipe could be a limiting factor in locating the furnace.

SHIPPING I NSPECTION

All units are securely packed in shipping containers tested according to International Safe Transit Association specifications. The carton must be checked upon arrival for external damage. If damage is found, a request for inspection by carrier’s agent must be made in writing immediately.

The furnace must be carefully inspected on arrival for damage and bolts or screws which may have come loose in transit. In the event of damage the consignee should:

1. Make a notation on delivery receipt of any visible damage to shipment or container.

2. Notify carrier promptly and request an inspection.

3. With concealed damage, carrier must be notified as soon as possible - preferably within five days.

4. File the claim with the following support documents within a nine month statute of limitations.

• Original or certified copy of the Bill of Lading, or indemnity bond.

• Original paid freight bill or indemnity in lieu thereof.

• Original or certified copy of the invoice, showing trade and other discounts or reductions.

• Copy of the inspection report issued by carrier’s representative at the time damage is reported to carrier.

The carrier is responsible for making prompt inspection of damage and for a thorough investigation of each claim. The distributor or manufacturer will not accept claims from dealers for transportation damage.

Keep this literature in a safe place for future reference.

ELECTROSTATIC D ISCHARGE (ESD) PRECAUTIONS

NOTE: Discharge body’s static electricity before touching unit.

An electrostatic discharge can adversely affect electrical components.

Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the integrated control module to electrostatic discharge.

This procedure is applicable to both installed and non-installed (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground.

2. Firmly touch a clean, unpainted, metal surface of the furnaces near the control. Any tools held in a person’s hand during grounding will be discharged.

3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge your body with static electricity; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come in contact with an ungrounded object, repeat step 2 before touching control or wires.

4. Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.

TO T HE I NSTALLER

Before installing this unit, please read this manual thoroughly to familiarize yourself with specific items which must be adhered to, including but not limited to: unit maximum external static pressure, gas pressures, BTU input rating, proper electrical connections, circulating air temperature rise, minimum or maximum CFM, and motor speed connections, and venting. These furnaces are designed for Category I venting only.

IMPORTANT N OTE TO THE O WNER R EGARDING P RODUCT WARRANTY

Complete warranty details and instructions are available from your local dealer or at www.goodmanmfg.com and www.amanahac.com. Your warranty certificate is supplied as a separate document with the unit installed by your contractor. Read the limited warranty certificate carefully to determine what is and is not covered and keep the warranty certificate in a safe place. If you are unable to locate the warranty certificate please contact your installing contractor or contact customer service (877-254-

4729) to obtain a copy.

To receive the Lifetime Heat Exchanger Limited Warranty, good for as long as you own your home, and the 10-year Parts Limited Warranty, online registration must be completed within 60 days of installation. Online registration is not required in California or Quebec.

IMPORTANT: To register your Goodman brand unit, go to www.goodmanmfg.com. Click on the word “Warranty” located on the left side of the home page. Next, click on the word “Product Registration” located on the left side of the Warranty page and complete the forms in the manner indicated on the Product Registration page.

To register your Amana brand unit, go to www.amana-hac.com. Click on the word “Warranty” located on the top right of the

OCATION

EQUIREMENTS

AND

ONSIDERATIONS

home page. Next, click on the word “Product Registration” located on the left side of the Warranty page and complete the forms in the manner indicated on the Product Registration page.

Product limited warranty certificates for models currently in production can be viewed at hac.com. If your model is not currently in production or does not appear on the website, please contact your installing contractor or contact customer service at (877-254-4729) to obtain a copy of your warranty certificate.

Each product overview page contains a Product Warranty link; by clicking on it you will be able to view the limited warranty coverage for that specific product. To view warranty registration information, click on the Product Warranty text on the left navigation panel on the home page of each website. The Online Product Registration pages are located in this same section.

www.goodmanmfg.com or www.amana-

WARNING

TO

PREVENTPROPERTYDAMAGE,PERSONALINJURYORDEATHDUETO FIRE,DONOTINSTALLTHISFURNACEINAMOBILEHOME,TRAILER,OR RECREATIONALVEHICLE

RODUCT DESCRIPTION



FEATURES

This furnace is a part of the ComfortNet™ family of products. The CTK01 ComfortNet thermostat kit allows this furnace to be installed as part of a digitally communicating system. The ComfortNet system provides automatic airflow configuration, enhanced setup features, and enhanced diagnostics. It also reduces the number of thermostat wires to a maximum of four. It may be also installed as part of a “legacy” system using a standard 24 VAC thermostat.

This product may also be installed with the ComfortNet thermostat and a non-ComfortNet compatible single stage air conditioning unit. However, this reduces the benefits of the ComfortNet system as the enhancements will only apply to the furnace.

• It must be installed per the installation instructions provided and per local and national codes.

• It must be installed indoors in a building constructed on site.

• It must be part of a ducted system and not used in a free air delivery application.

• It must not be used as a “make-up” air unit.

• All other warranty exclusions and restrictions apply.

This furnace may be used as a construction site heater ONLY if the following conditions are met:

• The vent system is permanently installed per these installation instructions.

• A room thermostat is used to control the furnace. Fixed jumpers that provide continuous heating CANNOT be used.

• Return air ducts are provided and sealed to the furnace.

• A return air temperature range between 60ºF (16ºC) and 80ºF (27ºC) is maintained.

• Air filters are installed in the system and maintained during construction, replaced as appropriate during construction, and upon completion of construction are replaced.

• The input rate and temperature rise are set per the furnace rating plate.

• 100% outside air is provided for combustion air requirements during construction. Temporary ducting can be used.

NOTE: Do not connect the temporary duct directly to the furnace. The duct must be sized for adequate combustion and ventilation in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ ANSI Z223.1 orCAN/CSA B149.1 Installation Codes.

• The furnace heat exchanger, components, duct system, air filters and evaporator coils are thoroughly cleaned following final construction clean up.

• All furnace operating conditions (including ignition, input rate, temperature rise and venting) are verified according to these installation instructions.

RODUCT APPLICATION

This furnace is primarily designed for residential home-heating applications. It is NOT designed or certified for use in mobile homes, trailers or recreational vehicles. Neither is it designed or certified for outdoor applications. The furnace must be installed indoors (i.e., attic space, crawl space, or garage area provided the garage area is enclosed with an operating door).

This furnace can be used in the following non-industrial commercial applications:

Schools, Office buildings, Churches, Retail stores,

Nursing homes, Hotels/motels, Common or office areas

In such applications , the furnace must be installed with the following stipulations:

NOTE: The Commonwealth of Massachusetts requires that the following additional requirements must also be met:

• Gas furnaces must be installed by a licensed plumber or gas fitter.

• A T-handle gas cock must be used.

• If the unit is to be installed in an attic, the passageway to and the service area around the unit must have flooring.

WARNING

TO

PREVENTPROPERTYDAMAGE,PERSONALINJURYORDEATHDUETO FIRE,DONOTINSTALLTHISFURNACEINAMOBILEHOME,TRAILER,OR RECREATIONALVEHICLE



OCATION

EQUIREMENTS

AND

ONSIDERATIONS

To ensure proper furnace operation, install, operate and maintain the furnace in accordance with these installation and operation instructions, all local building codes and ordinances. In their absence, follow the latest edition of

the National Fuel Gas Code (NFPA 54/ANSI Z223.1), and/or CAN/CSA B149 Installation Codes, local plumbing or waste water codes, and other applicable codes.

A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) can be obtained from any of the following:

American National Standards Institute

1430 Broadway

New York, NY 10018

National Fire Protection Association

1 Batterymarch Park

Quincy, MA 02269

CSA International

8501 East Pleasant Valley

Cleveland, OH 44131

A copy of the CAN/CSA B149 Installation Codes can also be obtained from:

CSA International

178 Rexdale Boulevard

Etobicoke, Ontario, Canada M9W 1R3

The rated heating capacity of the furnace should be greater than or equal to the total heat loss of the area to be heated. The total heat loss should be calculated by an approved method or in accordance with “ASHRAE Guide” or “Manual J-Load Calculations” published by the Air Conditioning Contractors of America.

In the USA, this furnace MUST be installed in accordance with the latest edition of the ANSI Z223.1 booklet entitled “National Fuel Gas Code” (NFPA 54), and the requirements or codes of the local utility or other authority having jurisdiction. In Canada, this furnace must be installed in accordance with the current CAN/CGA-B149.1 & 2 Gas Installation Codes, local plumbing or waste water codes and other applicable codes. Additional helpful publications available from the NFPA are, NFPA 90A Installation of Air Conditioning and Ventilating System and NFPA 90B - Warm Air Heating and Air Conditioning System.

All venting shall be in accordance with PART 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1, or applicable local building and/or air conditioning codes. These publications are available from:

National Fire Protection Association, Inc.

Batterymarch Park, Quincy, MA 02269

NOTE: Furnaces with NOx screens meet the California NOx emission standards and California seasonal efficiency standards. ANNUAL inspections of the furnace and its vent system is strongly recommended.

OCATION REQUIREMENTS AND CONSIDERATIONS

Your unit model type determines which installation procedures must be used. For *MVC8 models, you must follow instructions for Horizontal Left, Horizontal Right or Upflow installations only. These furnaces are not approved for Downflow installations. Downflow models *DVC8 ARE NOT APPROVED FOR HORI- ZONTAL OR UPFLOW INSTALLATIONS. For these models, use only the instructions for downflow installation only.

WARNING

TO

PREVENTPOSSIBLEEQUIPMENTDAMAGE,PROPERTYDAMAGE

PERSONALINJURYORDEATH,THEFOLLOWINGBULLETPOINTSMUSTBE

OBSERVEDWHENINSTALLINGTHISUNIT

Follow the instructions listed below when selecting a furnace location. Refer also to the guidelines provided in Section V,

Combustion and Ventilation Air Requirements.

• Centrally locate the furnace with respect to the proposed or existing air distribution system.

• Ensure the temperature of the return air entering the furnace is between 55°F and 100°F when the furnace is heating.

• Provisions must be made for venting combustion products outdoors through a proper venting system. The length of flue pipe could be a limiting factor in locating the furnace.

• Ensure adequate combustion air is available for the furnace. Improper or insufficient combustion air can expose building occupants to gas combustion products that could include carbon monoxide. Refer to Combustion and Ventilation Air Requirements section.

• The furnace must be level. If the furnace is to be set on a floor that may become wet or damp at times, the furnace should be supported above the floor on a concrete base sized approximately 1-1/2" larger than the base of the furnace.

• Ensure upflow or horizontal furnaces are not installed directly on carpeting, or any other combustible material. The only combustible material allowed is wood.

• Exposure to contaminated combustion air will result in safety and performance-related problems. Do not install the furnace where the combustion air is exposed to the following substances:

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

,



OCATION

EQUIREMENTS

AND

ONSIDERATIONS

hydrochloric acid

cements and glues

antistatic fabric softeners for clothes dryers

and masonry acid washing materials

• If the furnace is used in connection with a cooling unit, install the furnace upstream or in parallel with the cooling unit coil. Premature heat exchanger failure will result if the cooling unit coil is placed ahead of the furnace.

• 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, the furnace access doors must be vertical so that the burners fire horizontally into the heat exchanger. Do not install the unit with the access doors 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.

• For counterflow installations, the air conditioning coil must be downstream from the heat exchanger of the furnace.

• Counterflow installation over a noncombustible floor. 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 silicon rubber caulking compound or cement grout.

• Counterflow installation over a combustible floor. If installation over a combustible floor becomes necessary, use an accessory subbase (see Specification Sheet applicable to your model for details). A special accessory subbase must be used for upright counterflow unit installations over any combustible material including wood. Follow the instructions with the subbase for proper installations. 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.

ent Pipe Clearance to Combustibles6" using Single Wall Connector or 1" using B-1 vent.

Top - 1"

Back - 0"

Side Clearance - 1"

Front Clearance - 3"

• Adequate combustion/ventilation air must be supplied to the closet.

• Furnace must be completely sealed to floor or base. Combustion/ ventilation air supply pipes must terminate 12" from top of closet and 12" from floor of closet. DO NOT remove solid base plate for side return.

• Return air ducts must be completely sealed to the furnace and terminate outside the enclosure surfaces.

CLEARANCES AND A CCESSIBILITY

Unobstructed front clearance of 24" for servicing is recom- mended.

VENT

B1-VENT SINGLE

1" 6" 1" 3" 0" 1"

Top clearance for horizontal configuration - 1"

SIDES FRONT BACK

TOP

(PLENUM)

HORIZONTAL I NSTALLATION (*MVC8 MODELS O NLY)

Line contact to framing is permitted when installed in the horizontal configuration. Line contact is defined as the portion of the cabinet that is formed by the intersection of the top and side. ACCESSIBILITY CLEARANCE, WHERE GREATER, SHOULD TAKE PRECEDENCE OVER MINIMUM FIRE PROTECTION CLEARANCE. A gas-fired furnace for installation in a residential garage must be installed so that the ignition source and burners are located not less than eighteen inches (18") above the floor and is protected or located to prevent physical damage by vehicles. A gas furnace must not be installed directly on carpeting, tile, or other combustible materials other than wood flooring.

FURNACE S USPENSION

If suspending the furnace from rafters or joist, use 3/8" threaded rod and 2”x2”x3/8” angle iron as shown below. The length of rod will depend on the application and the clearances necessary.

OMBUSTION

Suspended Furnace

& V

ENTILATION

ATEGORY

EXISTING F URNACE R EMOVAL

NOTE: When an existing furnace is removed from a venting

system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.

The following vent testing procedure is reproduced from the

American National Standard/National Standard of Canada for Gas-Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-Latest Edition Section 1.23.1. The following

steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation:

a. Seal any unused openings in the venting system; b. Inspect the venting system for proper size and

horizontal pitch, as required by the National Fuel Gas Code, ANSI Z223.1 or the CAN/CSA B149 Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition;

c. In so far as practical, close all building doors and

windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers;

d. Follow the lighting instructions. Place the appliance

being inspected in operation. Adjust thermostat so appliance shall operate continuously;

e. Test for draft hood equipped appliance spillage at the

draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle;

f. After it has been determined that each appliance

connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use;

I V

ENTING

g. If improper venting is observed during any of the above

tests, the common venting system must be corrected.

Corrections must be in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CAN/ CSA B149 Installation Codes.

If resizing is required on any portion of the venting system, use the appropriate table in Appendix G in the latest edition of the National Fuel Gas Code ANSI Z223.1 and/or CAN/CSA B149 Installation Codes.

AIR R

EQUIREMENTS

THERMOSTAT L OCATION

In an area having good air circulation, locate the thermostat about five feet high on a vibration-free inside wall. Do not install the thermostat where it may be influenced by any of the following:

• Drafts, or dead spots behind doors, in corners, or under cabinets.

• Hot or cold air from registers.

• Radiant heat from the sun.

• Light fixtures or other appliances.

• Radiant heat from a fireplace.

• Concealed hot or cold water pipes, or chimneys.

• Unconditioned areas behind the thermostat, such as an outside wall.

HOT COLD

Thermostat Influences

Consult the instructions packaged with the thermostat for mounting instructions and further precautions.

OMBUSTION AND VENTILATION AIR REQUIREMENTS

WARNING

TO

AVOIDPROPERTYDAMAGE,PERSONALINJURYORDEATH

SUFFICIENTFRESHAIRFORPROPERCOMBUSTIONANDVENTILATIONOF

FLUEGASESMUSTBESUPPLIED

SUPPLIEDINTOTHEFURNACEAREA

Improved construction and additional insulation in buildings have reduced heat loss by reducing air infiltration and escape around doors and windows. These changes have helped in reducing

.M

OSTHOMESREQUIREOUTSID EAIRBE

,



XTERIOR MASONRY CHIMNEYS

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heating/cooling costs but have created a problem supplying combustion and ventilation air for gas fired and other fuel burning appliances. Appliances that pull air out of the house (clothes dryers, exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air.

House depressurization can cause back drafting or improper combustion of gas-fired appliances, thereby exposing building occupants to gas combustion products that could include carbon monoxide.

If this furnace is to be installed in the same space with other gas appliances, such as a water heater, ensure there is an adequate supply of combustion and ventilation air for the other appliances. Refer to the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/CSA B149 Installation Codes or applicable provisions of the local building codes for determining the combustion air requirements for the appliances.

This furnace must use indoor air for combustion. It cannot be installed as a direct vent (i.e., sealed combustion) furnace.

Most homes will require outside air be supplied to the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces.

ATEGORY

I V

ENTING

ERTICAL VENTING

)

MINIM UM VENT

MODEL

UPFLOW COUNTERFLOW

70 4 inch 4 inch 90 4 inch 4 inch

115 5 inch 4 inch

Under some conditions, larger vents than those shown above may be required or allowed. When an existing furnace is re- moved from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.

Upflow or Horizontal units are shipped with the induced draft blower discharging from the top of the furnace. (“Top” is as viewed for an upflow installation.) The induced draft blower can be rotated 90 degrees for Category I venting. For horizontal installations, a four inch single wall pipe can be used to extend the induced draft blower outlet 1/2” beyond the furnace cabinet.

THIS PRODUCT IS NOT DESIGNED FOR COUNTERCLOCKWISE INDUCED DRAFT BLOWER ROTATION.

Vent the furnace in accordance with the National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition. In Canada, vent the furnace in accordance with the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments.

Venting

WARNING

TO

PREVENTPOSSIBLEPERSONALINJURYORDEATHDUETO

ASPHYXIATION,THISFURNACEMUSTBECATEGORY

VENTUSINGCATEGORY

Category I Venting is venting at a non-positive pressure. A furnace vented as Category I is considered a fan-assisted appliance and the vent system does not have to be “gas tight.” NOTE: Single stage gas furnaces with induced draft blowers draw products of combustion through a heat exchanger allowing, in some instances, common venting with natural draft appliances (i.e. water heaters). All installations must be vented in accordance with National Fuel Gas Code NFPA 54/ANSI Z223.1

- latest edition. In Canada, the furnaces must be vented in accordance with the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments.

NOTE: The vertical height of the Category I venting system must be at least as great as the horizontal length of the venting system.

III

VENTING

I

VENTED



.DO

NOT



WARNING

TO

PREVENTPOSSIBLEPERSONALINJURYORDEATHDUETO

ASPHYXIATION,COMMONVENTINGWITHOTHERMANUFACTURER’S

INDUCEDDRAFTAPPLIANCESISNOTALLOWED

The minimum vent diameter for the Category I venting system is as shown:



THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORIZONTALLY VENTED.

To rotate the induced draft blower clockwise, you will need to purchase one (0270F01119) chimney transition bottom kit.

1. Disconnect electrical power from the furnace.

2. Disconnect the induced draft blower power leads, flue pipe, and pressure switch tubing.

3. Remove the round cutout from the right side of the wrapper.

4. Remove and save the four screws that fasten the induced draft blower to the flue collector box.

5. Remove and save the three screws that hold the chimney assembly to the induced draft blower.

6. Remove and save the four screws that fasten the chimney top to the chimney bottom.

7. Remove the chimney transition bottom from the transition bottom kit.

8. Install the chimney top with the four screws retained from step 6 onto the new chimney transition bottom from the transition bottom kit.

9. Install chimney assembly with the three screws retained from step 5 onto the induced draft blower.

10. Reinstall the induced draft blower rotating it 90 degrees clockwise from the original upflow configuration using the four screws retained in step 3. Ensure the gasket located between the induced draft blower and the collector box is rotated accordingly.

XTERIOR MASONRY CHIMNEYS

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11. Reconnect the induced draft blower power leads. NOTE: If the wires are not long enough, pull extra wire from the wire bundle in the blower compartment.

12. Reconnect the flue pipe, and the pressure switch tubing. Ensure that all wires and the pressure switch tubing is at least one inch from the flue pipe, or any other hot surface.

13. Restore power to furnace.

Counterflow units are shipped with the induced draft blower discharging from the top of the furnace. (“Top” as viewed for a counterflow installation.)

Vent the furnace in accordance with the National Fuel Gas Code NFPA54/ANSI Z223.1-latest edition. In Canada, vent the furnace in accordance with the national standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2- latest editions and amendments.

WARNING

EVERALLOWTHEPRODUCTSOFCOMBUSTION,INCLUDINGCARBO N

MONOXIDE,TOENTERTHERETURNDUCTWORKORCIRCULATIONAIR

SUPPLY

XTERIOR MASONRY CHIMNEYS

( C

ATEGORY

I F

URNACES ONLY



An exterior masonry chimney is defined as a “Masonry” chimney exposed to the outdoors on one or more sides below the roof line.” The ability to use a clay lined masonry chimney depends on a parameter not associated with interior chimneys. This variable is the geographic location of the installation. Researchers have discovered that the winter design temperatures have a direct impact on the suitability of this type of venting. In most situations, the existing masonry chimneys will require a properly sized metallic liner.

WARNING

Was h

Roof Line

Clay Tile Size: 8" x 8" x12"

(Each x 24" Length )

Attic Floor

1/2" to 1" Air Space

Second Floor

Throat

Damper

Breech

Fan Assisted

Clean Out

Typical Multiple Flue Clay Tile Chimney

Forced Air Furnace

F.A .F. Ve nt Connector

First Flo or

Water Heater Vent Connect or

Natural Draft Wate r Heat er

Basement Floor

CHECKLIST S UMMARY

This checklist serves as a summary of the items to be checked before venting an 80+ furnace into a masonry chimney. In addition, we recommend that a qualified serviceman use this check-

)

list to perform a yearly inspection of the furnace venting system.

This checklist is only a summary. For detailed information on each of the procedures mentioned, see the paragraph referenced with each item.

This inspection is based upon a draft topical report, “Masonry Chimney Inspection and Relining”, issued by the Gas Research Institute. While not yet finalized, we believe this report represents the best information on this subject which is currently available.

OSSIBILITYOFPROPERTYDAMAGE,PERSONALINJURYORDEATH

DAMAGINGCONDENSATIONCANOCCURINSIDEMASONRYCHIMNEYS

WHENASINGLEFAN‐ASSISTEDCATEGORY

FURNACE)ISVENTEDWITHOUTADEQUATEDILUTIONAIR

CONNECTAN

FURNACEISCOMMONVENTEDWITHADRAFTHOODEQUIPPED

APPLIANCEORTHECHIMNEYISLINEDWITHAMETALLINERORTYPE

METALVENT

SIZEDINACCORDANCEWITHTHEAPPROPRIATEVENTINGTABLES

80%

APPLIANCE,THEPOTENTIALFORCONDENSATIONDAMAGEMAYSTILL

EXISTWITHEXTREMELYCOLDCONDITIONS,LONGVENTCONNECTORS

EXTERIORCHIMNEYS,ORANYCOMBINATIONOFTHESECONDITIONS

HERISKOFCONDENSATIONDAMAGEISBESTAVOIDEDBYUSING

MASONRYCHIMNEYASAPATHWAYFORPROPERLYSIZEDMETALLINER

ORTYPE

80%

FURNACETOAMASONRYCHIMNEYUNLESSTHE

.ALL

INSTALLATIONSUSINGMASONRYCHIMNEYSMUSTBE

FURNACEISCOMMO NVENTEDWITHADRAFTHOODEQUIPPED

B

METALVENT

I

APPLIANCE

(80%AFUE

.DO

NOT



.IFAN



.



B



 

,



XTERIOR MASONRY CHIMNEYS

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Proper Chimney

Termination?

(Check 1)

Chimney channel

free of solid and

liquid fuel

appliances?

(Check 2)

Crown in good

condition

(Check 3)

Cleanout free of

debris?

(Check 4)

Change venting

arrangements

(Fix 2)

Rebuild crown

(Fix 3)

and/or Reline

(Fix 4)

Reline (Fix 4)

If the chimney does not meet these termination requirements, but all other requirements in the checklist can be met, it may be possible for a mason to extend the chimney. If this will not be practical, see Fix 1.

10' or Less

2' Min.

Wall or Parapet

Chimney

10' or Less

2' Min.

Chimney

3' Min.

Liner in good

condition?

(Check 5)

Dilution air

available? (Check 6)

Reline (Fix 4)

Complete the

installation.

(Check 7)

CHECK 1 - PROPER CHIMNEY TERMINATION.

A masonry chimney used as a vent for gas fired equipment must extend at least three feet above the highest point where it passes through the roof. It must extend at least two feet higher than any portion of a building within a horizontal distance of 10 feet. In addition, the chimney must terminate at least 3 feet above any forced air inlet located within 10 feet. The chimney must extend at least five feet above the highest connected equipment draft hood outlet or flue collar.

Termination 10 Feet Or Less From Ridge, Wall or Parapet

More than 10’

3’ Min.

NOTE:

No Height

above parapet

Wall or Parapet

Ridge

Termination More Than 10 Feet From Ridge, Wall or Parapet

required when distance from walls or parape t is more than 10 feet.

More than 10’

Chimney

10’

2” Min.

Chimney

Height above any roof surface within 10 feet horiz ontally.

3’ Min.

CHECK 2 - ANY S OLID OR L IQUID F UEL A PPLIANCES V ENTED

THIS C HIMNEY C HANNEL

INTO

Solid fuel appliances include fireplaces, wood stoves, coal furnaces, and incinerators.

XTERIOR MASONRY CHIMNEYS

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Liquid fuel appliances include oil furnaces, oil-fired boilers and oil-fired water heaters.

Appliances which burn propane (sometimes referred to as LP (liquefied petroleum)) gas are considered gas-fired appliances.

CHECK 3 - CHIMNEY C ROWN C ONDITION.

Damage from condensate usually shows up first in the crown. If any of the following trouble signs are present, the condition of the crown is not satisfactory:

a) Crown leaning b) Bricks missing c) Mortar missing d) Tile liner cracked e) No tile liner f) Salt staining at mortar joints. (White stains, and mortar

becomes sandy and/or erodes.)

For problems a, b, or c, see Fix 3. If problems d, e, or f are present, see Fix 4. IMPORTANT: It may be necessary to follow both Fix 3 and Fix 4.

CHECK 4 - DEBRIS IN C LEANOUT.

A cleanout (dropleg) must be present such that the upper edge of the cleanout cover is at least 12 inches below the lower edge of the lowest chimney inlet opening.

A chimney without a cleanout could become partially blocked by debris. If no cleanout is present, the chimney must be relined (Fix 4). Remove the cleanout cover, and examine the cleanout for debris. If significant amounts of any of the following are found:

• Fuel oil residue

• Bricks

• Mortar or sand

• Pieces of the tile liner

• Rusted pieces of the metallic liner - reline the chimney (Fix 4).

CHECK 5 - LINER C ONDITION.

If a metal liner is present, it must be checked. It cannot be assumed that all existing metal liners are correctly installed and in good condition.

Remove the lowest existing vent connector, and examine the inside of the elbow or tee at the base of the liner. A small amount of soot may be considered acceptable, provided the installer vacuums it away. If rusted pieces of the liner have collected here, the metal liner must be removed and replaced (Fix 4).

Next, gently tap the inside of the liner with a Phillips screwdriver. If the screwdriver perforates the liner, or if the tapping does not sound like metal hitting metal, the liner must be removed and replaced (Fix 4).

Remember that all appliances must be vented inside the liner. Venting one appliance inside the liner and another appliance outside the liner is not acceptable.

Next, use a flashlight and small mirror to sight up the liner. B vent must be supported so as to not come into direct contact with the chimney walls or tile liner. If it is not, it can probably be rehung so as to be acceptable. A thimble or fire stop may be helpful here.

Flexible liners should be hung straight or nearly straight. If it is spiraled in the chimney and in good condition, it should be rehung. To do this, break the top seal; pull up and cut off the excess liner length, and refit the top seal. Use caution when doing this, as the cut edges of flexible liners may be sharp.

The surfaces of the liner must be physically sound. If gaps or holes are present, the metal liner must be removed and replaced (Fix 4). Finally, confirm that the metal liner is the correct size for the appliances to be installed. Use the GAMA tables and rules.

If a metal liner is not present, a clay tile liner must be present, or the chimney must be lined (Fix 4).

Use a flashlight and small mirror at the cleanout or vent connector to inspect the clay tile liner. If any of the following problems are present:

• Tile sections misaligned

• Tile sections missing

• Gaps between tile sections

• Signs of condensate drainage at the cleanout or vent connectors

• Mortar protruding from between tile sections

• Use of sewer pipe or drainage pipe rather than an approved fire clay tile reline the chimney (Fix 4).

Next, measure the size of the liner. It may be possible to do this from the cleanout. The liner must be at least as large as the minimum size established by the tables in National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments. If the liner is too small or too large, then the chimney must be relined (Fix 4).

CHECK 6 - DILUTION A IR.

If gas-fired appliances are to be vented into a clay tile liner, a source of dilution air is required.

Dilution air cannot be obtained through:

• Induced draft appliances

• Natural draft appliances with vent dampers

Sufficient dilution air can ordinarily be obtained through the draft hood of a natural draft appliance only if the appliance’s vent connector does not include a vent damper. If dilution air will not be available, the chimney must be relined (Fix 4).

CHECK 7 - COMPLETE THE I NSTALLATION.

If Checks 1 through 6 have been satisfactory, and the liner is an acceptable size as determined by the tables in National Fuel

LECTRICAL

ONNECTIONS

Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments, then the clay tile liner can probably be used as a vent for the gas appliances. However, the installer must keep in mind the following factors which may render the tile liner unsuitable for use as a vent:

• Extremely cold weather

• Long vent connectors

• Masonry chimneys with no air gap between the liner and the bricks. (In practice, this can be difficult to detect.)

• Exterior chimneys (The tables in National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments assume interior chimneys.)

If, in the judgment of the local gas utility, installer, and/or local codes; one or more of the above factors is likely to present a problem, the chimney must be relined (Fix 4).

FIX 1 - LINER T ERMINATION

Any cap or roof assembly used with a liner must be approved by the liner manufacturer for such use. The liner and cap/roof assembly must then terminate above the roof in accordance with the manufacturer’s instructions.

In some cases, a shorter extension above the roof may be possible with a liner than would be required with a masonry chimney.

For further information on relining, see Fix 4.

FIX 2 -CHANGE V ENTING A RRANGEMENTS

If the masonry chimney has more than one channel, it may be possible to vent the gas appliances into one channel and vent the solid or liquid fuel appliance(s) into another channel(s). Do not vent an 80+ Furnace inside of a metal liner with other appliances vented outside the liner.

Alternatively, the homeowner may agree to discontinue use of the fireplace (solid fuel appliance). If so, the tile liner must be cleaned to remove creosote buildup. The fireplace opening must then be permanently sealed.

If oil-fired appliance(s) are being replaced by gas-fired appliance(s), the tile liner must first be cleaned to remove the fuel oil residue.

If none of the above options is practical, the furnace may need to be vented vertically with a B Vent.

Under some conditions, a 90%+ furnace could be installed rather than an 80% furnace. The 90%+ furnace can be vented horizontally or vertically through PVC pipe.

FIX 3 - REBUILD THE C ROWN

If the chimney crown is damaged, a qualified mason must repair it in accordance with nationally recognized building codes or standards. One such standard which may be referenced is the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances, ANSI/NFPA 211.

FIX 4 - RELINING

Relining options include B vent and flexible liners.

If the chimney has diagonal offsets, B vent probably cannot be used.

If B vent is to be used, it must be supported adequately. Supports (such as fire stops or thimbles) must be used to prevent the B vent from coming into direct contact with the tile liner or chimney walls. Direct contact would result in higher heat loss, with an increased possibility of poor venting system performance.

It is not acceptable to vent one appliance inside the B vent and other appliances outside. The excess space between the B vent and the chimney walls must be covered at the top of the chimney by a weatherproof, corrosion resistant flashing.

The B vent should then be topped with a listed vent cap. The listed vent cap will, when installed per the manufacturer’s instructions, prevent problems due to rain, birds, or wind effects.

A B-vent installed as described in this section is considered to be an enclosed vent system, and the sizing tables in National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CSA B149.1 and CAN/ CSA B149.2 - latest editions and amendments may be used.

If a flexible liner is to be used, it must be made of the proper materials:

• For most residential applications, an aluminum liner should be acceptable.

• If the combustion air supplied to the furnace will be contaminated with compounds containing chlorine or fluorine, a liner of AL 29-4C stainless steel should be used. Common sources of chlorine and fluorine compounds include indoor swimming pools and chlorine bleaches, paint strippers, adhesives, paints, varnishes, sealers, waxes (which are not yet dried) and solvents used during construction and remodeling. Various commercial and industrial processes may also be sources of chlorine/fluorine compounds.

• Heavier gauge 300 and 400 series stainless steel liners were developed for use with oil or solid fuel appliances. They are not suitable for use with gas-fired appliances. Flexible liners specifically intended and tested for gas applications are listed in the UL “Gas and Oil Equipment Directory”. (UL Standard 1777).

For sizing of flexible liners, see Note 22 and the tables in the National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition

LECTRICAL

ONNECTIONS

and in the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments.

To install the liner, read and follow the liner manufacturer’s instructions and your local codes. Excess liner length should be pulled out of the chimney and cut off. Use caution when doing this, as the cut edges of flexible liners may be sharp. Do not spiral excess liner inside of the chimney. Support the liner as recommended by the liner manufacturer.

Some manufacturers of flexible liners offer an insulation sleeve designed to be added to the liner before it is installed in the chimney. (Poured insulation, either vermiculite or other materials, is no longer recommended.) Insulation will need to be added to the flexible liner if:

• It is required by the liner manufacturer’s instructions.

• The previous liner was properly sized and installed, and suffered from condensation damage.

• It is required by your local building codes.

Even if none of those three conditions exist which require additional liner insulation, the installer may wish to consider it if:

• The local climate is very cold.

• The chimney is very tall.

• The vent connectors used are very long or have a large number of elbows.

• Local experience indicates that flexible liners installed without insulation are likely to have condensation problems.

Insulation must be selected and installed in accordance with the liner manufacturer’s instructions.

Finally, cap the chimney and terminate the liner in accordance with the liner manufacturer’s instructions.

LECTRICAL CONNECTIONS

WARNING

HIGHVOLTAGE!

TO

AVOIDTHERISKOFELECTRICALSHOCK,WIRINGTO

THEUNITMUSTBEPOLARIZEDANDGROUNDED



WARNING

HIGHVOLTAGE!

TO

AVOIDPERSONALINJURYORDEATHDUETO

ELECTRICALSHOCK,DISCONNECTELECTRICALPOWER

BEFORESERVICINGORCHANGINGANYELECTRICAL

WIRING



WARNING

HIGHVOLTAGE!

TO

AVOIDTHERISKOFINJURY,ELECTRICALSHOCKOR

DEATH,THEFURNACEMUSTBEELECTRICALLY

GROUNDEDINACCORDANCEWITHLOCALCODESORIN

THEIRABSENCE,WITHTHELATESTEDITIONOFTHE

ATIONALELECTRICCODE



WIRING H ARNESS

The wiring harness is an integral part of this furnace. Field alteration to comply with electrical codes should not be required. Wires are color coded for identification purposes. Refer to the wiring diagram for wire routings. If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C. Any replacement wiring must be a copper conductor.

115 VOLT L INE C ONNECTIONS

Before proceeding with electrical connections, ensure that the supply voltage, frequency, and phase correspond to that specified on the unit rating plate. Power supply to the furnace must be NEC Class 1, and must comply with all applicable codes. The furnace must be electrically grounded in accordance with local codes or, in their absence, with the latest edition of The National Electric Code, ANSI NFPA 70 and/or The Canadian Electric Code CSA C22.1.

Use a separate fused branch electrical circuit containing properly sized wire, and fuse or circuit breaker. The fuse or circuit breaker must be sized in accordance with the maximum overcurrent protection specified on the unit rating plate. An electrical disconnect must be provided at the furnace location.

Connect hot, neutral, and ground wires as shown in the wiring diagram located on the unit’s blower door.

Line polarity must be observed when making field connections. Line voltage connections can be made through either the right or left side panel. The furnace is shipped configured for a right side electrical connection with the junction box located inside the burner compartment (blower compartment for downflows). To make electrical connections through the opposite side of the furnace, the junction box must be relocated to the other side of the burner (or blower) compartment prior to making electrical connections. To relocate the junction box, follow the steps shown below.

NOTE: Wire routing must not to interfere with circulator blower operation, filter removal, or routine maintenance.

CAUTION

ABELALLWIRESPRIORTODISCONNECTIONWHENSERVICING

CONTROLS

OPERATION

.W

IRINGERRORSCANCAUSEIMPROPERANDDANGEROUS

.V

ERIFYPROPEROPERATIONAFTERSERVICING



LECTRICAL

ONNECTIONS

JUNCTION B OX R ELOCATION

WARNING

DGESOFSHEETMETALHOLESMAYBESHARP

PRECAUTIO NWHENREMOVINGHOLEPLUGS

.USE

GLOVESASA



Line voltage connections can be made through either the right or left side panel. The furnace is shipped configured for a right side electrical connection. To make electrical connections through the opposite side of the furnace, the junction box must be relocated to the left side prior to making electrical connections. To relocate the junction box, perform the following steps.

WARNING

TO

PREVENTPERSONALINJURYORDEATHDUETOELECTRICSHOCK

DISCONNECTELECTRICALPOWERBEFOREINSTALLINGORSERVICINGTHIS

UNIT

,



1. Remove both doors from the furnace.

2. Remove and save the screws holding the junction box to the right side of the furnace.

3. Models that have the junction box located in the burner or blower compartment will need to move the junction box directly over.

4. Attach the junction box to the left side of the furnace, using the screws removed in step 2.

5. Check the location of the wiring. Confirm that it will not be damaged by heat from the burners or by the rotation of the fan. Also confirm that wiring location will not interfere with filter removal or other maintenance.

After the junction box is in the desired location, use washers to connect field-supplied conduit to the junction box in accordance with NEC and local codes. Connect hot, neutral, and ground wires as shown in the furnace wiring diagram. The wires and ground screw are located in the furnace junction box.

NOTE: In downflow applications the power leads should be routed through the supplied wire tabs when locating junction box to the left side.

Low voltage wires may be connected to the terminal strip.

IMPORTANT NOTE: To avoid possible equipment malfunction, route the low voltage wires to avoid interference with filter removal or other maintenance.

WARNING

HIGHVOLTAGE!

TO

AVOIDTHERISKOFINJURY,ELECTRICALSHOCKOR

DEATH,THEFURNACEMUSTBEELECTRICALLY

GROUNDEDINACCORDANCEWITHLOCALCODESORIN

THEIRABSENCE,WITHTHELATESTEDITIONOFTHE

ATIONALELECTRICCODE



To ensure proper unit grounding, the ground wire should run from the furnace ground screw located inside the furnace junction box all the way back to the electrical panel. NOTE: Do not use gas piping as an electrical ground. To confirm proper unit grounding, turn off the electrical power and perform the following check.

1. Measure resistance between the neutral (white) connection and one of the burners.

2. Resistance should measure 10 ohms or less.

This furnace is equipped with a blower door interlock switch which interrupts unit voltage when the blower door is opened for servicing. Do not defeat this switch.

24 VOLT T HERMOSTAT W IRING

IMPORTANT NOTE

IREROUTINGMUSTNOTINTERFEREWITHCIRCULATORBLOWER

OPERATION,FILTERREMOVA LORROUTINEMAINTENANCE

REMOVA BLEPLUGCONNECTORISPROVIDEDWITHTHECONTROLTO

A

MAKETHERMOSTATWIRECONNECTIONS

WIRECONNECTIONSMADETOTHEPLUG,ANDREPLACED

STRONGLY

TERMINALBETWISTEDTOGETHERPRIORTOINSERTINGINTOTHEPLUG

CONNECTOR

OPERATION

RECOMMENDEDTHATMULTIPLEWIRESINTOASINGLE



.F

AILURETODOSOMAYRESULTININTERMITTENT

.T

HISPLUGMAYBEREMOVED

.ITIS

As a two-stage non-communicating furnace, the furnace integrated control module provides terminals for both “W1” and “W2”, and “Y1” and “Y2” thermostat connections. This allows the furnace to support the following system applications: ‘TwoStage Heating Only’, ‘Two-Stage Heating with Single Stage Cooling’, and ‘Two-Stage Heating with Two-Stage Cooling’. Refer to the following figures for proper connections to the integrated control module.

Low voltage connections can be made through either the right or left side panel. Thermostat wiring entrance holes are located in the blower compartment. The following figure shows connections for a “heat/cool system”.

This furnace is equipped with a 40 VA transformer to facilitate use with most cooling equipment. Consult the wiring diagram, located on the blower compartment door, for further details of 115 Volt and 24 Volt wiring.

NOTE: For single stage cooling applications, a jumper must be located between Y1 and Y2 at the furnace control in order to achieve the desired single stage cooling airflow. Use of ramping profiles and dehumidification features require a jumper between Y1 and O and Y1 and DEHUM, respectively.

NOTE: Thermostat “R” required if outdoor unit is equipped with a Comfort Alert™ module or if the out door unit is a part of the ComfortNet™ family of equipment AND is wired as a legacy system.



,



)

NOFF

LECTRICAL

ONNECTIONS

Thermostat

Y C

Remote

Condensing Unit

(Single-Stage Cooling)

Single Stage Heating with Si ngle St age Cooling

To apply a single-stage Heating Thermostat,

NOTE:

the thermostat selector switch on the Integrated Control Module be set on single-stage.

Y C

Remote

Condensing Unit

(Single-Stage Cooling)

Single Stage Heating with

Single Stage Cooling

Furnace Integrated

NEU

Dehumidistat

[Optional]

must

Thermostat

Two-Stage Heati ng

Single-Stage Cooling

Furnace Integrated

Control Module

NEU

Dehumidistat

[Optional]

Control Module

with

DIP switch to the desired ON/OFF position. Turn power back on. Refer to the following figure.

Heat OFF Delay DIP Switches

ONOFF

Thermostat

Stage Delay

Move to the ON position to select two-stage thermostat or OFF to select single stage thermostat

Move to the ON position to select Auto transition delay or OFF for 5 minute transition delay

24 VOLT D EHUMIDISTAT W IRING

The optional usage of a dehumidistat allows the furnace’s circulator blower to operate at a slightly lower speed (85% of desired speed) during a combined thermostat call for cooling and dehumidistat call for dehumidification. This can be done through an independent dehumidistat or through a thermostat’s DEHUM terminal (if available). This lower blower speed enhances dehumidification of the conditioned air as it passes through the AC coil. For proper function, a dehumidistat applied to this furnace must operate on 24 VAC and utilize a switch which opens on humidity rise. Refer to the “Thermostat Wiring Diagrams” figure for additional wiring details.

Two-Stage Heating with Single-Stage Cooling

Thermostat

Remote

Condensing Unit

(Two-Stage Cooling)

Two-Stage Heating with Two-Stage Cool ing

W1 W2

NEU

Two-Stage Heati ng

(

Two-Stage Cooling

Furnace Integrated

Dehumidistat

[Optional]

with

Control Module

Thermostat Wiring Diagrams

SINGLE-STAGE H EATING T HERMOSTAT A PPLICATION

A single-stage thermostat with only one heating stage may be used to control this furnace. The application of a single-stage thermostat offers a timed transition from low to high fire. The furnace will run on low stage for a fixed period of time before stepping up to high stage to satisfy the thermostat’s call for heat. The delay period prior to stepping up can be set at either a fixed 5 minute time delay or a load based variable time between 1 and 12 minutes (AUTO mode). If the AUTO mode is selected, the control averages the cycle times of the previous three cycles and uses the average to determine the time to transition from low stage to high stage.

To use a single-stage thermostat, turn off power to the furnace, move the thermostat selection DIP switch to the OFF position. Set the desired transition time by setting the transition delay

To install/connect a dehumidistat:

1. Turn OFF power to furnace.

2. Secure the dehumidistat neutral wire (typically the white lead) to the terminal marked “DEHUM” on the furnace integrated control module.

3. Secure the dehumidistat hot wire (typically the black lead) to the terminal marked “R” on the furnace integrated control module.

4. Secure the dehumidistat ground wire (typically the green lead) to the ground screw on the furnace junction box. NOTE: Ground wire may not be present on all dehumidistats.

5. Turn ON power to furnace.

To enable the dehumidify function on the integrated control module, set the dehumidification ENABLE dipswitch from OFF to ON.

Once the switch is set, the dehumidify function is enabled during a combination call for cooling (T-Stat) and dehumidification (DEHUM-Stat).

DEHUM

Unused

Move to the ON position to enable dehumidification

FOSSIL F UEL A PPLICATIONS

This furnace can be used in conjunction with a heat pump in a fossil fuel application. A fossil fuel application refers to a combined gas furnace and heat pump installation which uses an outdoor temperature sensor to determine the most cost efficient means of heating (heat pump or gas furnace).

UPPLY AND

IPING

A heat pump thermostat with three stages of heat is required to properly use a two-stage furnace in conjunction with a heat pump. Refer to the fossil fuel kit installation instructions for additional thermostat requirements.

Strictly follow the wiring guidelines in the fossil fuel kit installation instructions. All furnace connections must be made to the furnace two-stage integrated control module and the “FURNACE” terminal strip on the fossil fuel control board.

115 VOLT L INE C ONNECTION OF A CCESSORIES ( H UMIDIFIER

E LECTRONIC A IR C LEANER)

AND

WARNING

HIGHVOLTAGE!

TO

AVOIDPERSONALINJURYORDEATHDUETO

ELECTRICALSHOCK,DISCONNECTELECTRICALPOWER

BEFORESERVICINGORCHANGINGANYELECTRICAL

WIRING

The furnace integrated control module is equipped with line voltage accessory terminals for controlling power to an optional field-supplied humidifier and/or electronic air cleaner.

The accessory load specifications are as follows:

Humidifier 1.0 Amp maximum at 120 VAC

Electronic Air Cleaner 1.0 Amp maximum at 120 VAC

Turn OFF power to the furnace before installing any accessories. Follow the humidifier or air cleaner manufacturers’ instructions for locating, mounting, grounding, and controlling these accessories. Accessory wiring connections are to be made through the 1/4" quick connect terminals provided on the furnace integrated control module. The humidifier and electronic air cleaner hot terminals are identified as HUM and EAC. The humidifier and electronic air cleaner neutral terminals are identified as NEUTRAL. All field wiring must conform to applicable codes. Connections should be made as shown.



to all local codes, and have a minimum temperature rating of 105°C. All line voltage wire splices must be made inside the furnace junction box.

The integrated control module humidifier terminals (HUM) are energized with 115 volts whenever the induced draft blower is energized. The integrated control module electronic air cleaner terminals (EAC) are energized with 115 volts whenever the circulator blower is energized.

24 VOLT H UMIDIFIER

A 5" long brown wire in the wire harness at the low fire pressure switch provides 24 VAC humidifier control. This wire is powered any time the pressure switch is closed. To connect 24 VAC HUM, connect the 24 VAC line of the humidifier to the 5” brown wire. The connection can be made by either stripping the wire and using a wire nut or by using a field supplied quick connect terminal. The wiring must conform to all local and national codes. Connect the COM side of the humidifier to the C terminal on the furnace control board (or to the COM side of the 24 VAC transformer). Do not connect 115V humidifier to these terminals.

GAS S

The furnace rating plate includes the approved furnace gas input rating and gas types. The furnace must be equipped to operate on the type of gas applied. This includes any conversion kits required for alternate fuels and/or high altitude.

TO

INLETGASSUPPLYPRESSUREMUSTBEASSPECIFIEDONTHEUNIT

RATINGPLATEWITHALLOTHERHOUSEHOLDGASFIREDAPPLIANCES

OPERATING

Inlet gas supply pressures must be maintained within the ranges specified in the following table. The supply pressure must be constant and available with all other household gas fired appliances operating. The minimum gas supply pressure must be maintained to prevent unreliable ignition. The maximum must not be exceeded to prevent unit overfiring.

UPPLY AND PIPING

CAUTION

PREVENTUNRELIABLEOPERATIONOREQUIPMENTDAMAGE,THE

Inlet Gas Supply Pressure

Natural Gas

Propane Gas

Minimum: 5.0" w.c. Maximum:10.0" w.c. Minimum: 11.0" w.c. Maximum:13.0" w.c.



Accessories Wiring

If it is necessary for the installer to supply additional line voltage wiring to the inside of the furnace, the wiring must conform

NOTE: Adjusting the minimum supply pressure below the limits in the above table could lead to unreliable ignition. Gas input to the burners must not exceed the rated input shown on the rating plate. Overfiring of the furnace can result in premature heat exchanger failure. Gas pressures in excess of 13 inches water column can also cause permanent damage to the gas valve.

At all altitudes, the manifold pressure must be within 0.3 inches w.c. of that listed in the Specification Sheet applicable to your model for the fuel used. At all altitudes and with either fuel, the

IRCULATING

AIR

AND

ILTERS

air temperature rise must be within the range listed on the furnace nameplate. Should this appliance be converted to LP, refer to the instructions included in the factory authorized LP conversion kit.

HIGH A LTITUDE D ERATE

IMPORTANT NOTE: The furnace will naturally derate itself with

altitude. Do not attempt to increase the firing rate by changing orifices or increasing the manifold pressure. This can cause poor combustion and equipment failure.

High altitude installations may require both a pressure switch and an orifice change. These changes are necessary to compensate for the natural reduction in the density of both the gas fuel and the combustion air at higher altitude.

For installations above 7000 feet, please refer to your distributor for required kit(s).

Alti tude Kit

Gas

Natural None #43 3.5" w.c. 1.9" w.c. None

0-7000

Propane

LPM-05* support s White-Rodgers 2-s tage val ve only

LPM-06* s upports Honeywell and White-Rodgers 2-st age valves

In Canada, gas furnaces are only c ertified to 4500 feet .

NOTE:

LPM-05* LPM-06*

Ori fice

#55 10.0" w.c. 6.0" w.c . None

Ma ni fol d P ressur e Pre ssure

High Stage Low Stage

Switch Change

Contact the distributor for a tabular listing of appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper furnace operation. All conversions must be performed by a qualified installer, or service agency.

PROPANE G AS C ONVERSION

WARNING

OSSIBLEPROPERTYDAMAGE,PERSONALINJURYORDEATHMAY

OCCURIFTHECORRECTCONVERSIONKITSARENOTINSTALLED

APPROPRIATEKITSMUSTBEAPPLIEDTOENSURESAFEANDPROPER

FURNACEOPERATION

QUALIFIEDINSTALLERORSERVICEAGENCY

.ALL

CONVERSIONSMUSTBEPERFORMEDBYA

This unit is configured for natural gas. The appropriate manufacturer’s propane gas conversion kit, must be applied for propane gas installations. Refer to the “Propane Gas and/or High Altitude Installations” section for details.

Contact your distributor for a tabular listing of appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper furnace operation. All conversions must be performed by a qualified installer, or service agency.



.THE



GAS P IPING C ONNECTIONS

WARNING

TO

AVOIDPOSSIBLEUNSATISFACTORYOPERATIONOFEQUIPMENT

DAMAGEDUETOUNDERFIRINGOREQUIPMENT,USETHEPROPERSIZE

OFNATURAL/PROPANEGASPIPINGNEEDEDWHENRUNNINGPIPEFROM

THEMETER/TANKTOTHEFURNACE

When sizing a trunk line, be sure to include all appliances which will operate simultaneously.

The gas piping supplying the furnace must be properly sized based on the gas flow required, specific gravity of the gas, and length of the run. The gas line installation must comply with local codes, or in their absence, with the latest edition of the National Fuel Gas Code, NFPA 54/ANSI Z223.1.

Natural Gas Capacity of Pipe

Length of Nominal Black Pipe Size

Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2"

10 132 278 520 1050 1600 20 92 190 350 730 1100 30 73 152 285 590 980 40 63 130 245 500 760 50 56 115 215 440 670 60 50 105 195 400 610 70 46 96 180 370 560 80 43 90 170 350 530 90 40 84 160 320 490

100 38 79 150 305 460

(Pressure 0.5 ps ig or less and pressure drop of 0.3" W.C.; Bas ed on

0.60 Specific Gravity Gas)

BTUH Furnac e Input

CFH =

Heating Value of Gas (BTU/Cubic Foot)

In Cubic Feet of Gas Per Hour (CFH)

To connect the furnace to the building’s gas piping, the installer must supply a ground joint union, drip leg, manual shutoff valve, and line and fittings to connect to gas valve. In some cases, the installer may also need to supply a transition piece from 1/ 2" pipe to a larger pipe size.

The following stipulations apply when connecting gas piping.

• Use black iron or steel pipe and fittings for the building piping.

• Use pipe joint compound on male threads only. Pipe joint compound must be resistant to the action of the fuel used.

• Use ground joint unions.

• Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches long.

• Install a 1/8" NPT pipe plug fitting, accessible for test gage connection, immediately upstream of the gas supply connection to the furnace.

• Use two pipe wrenches when making connection to the gas valve to keep it from turning. The orientation of the gas valve on the manifold must be maintained as shipped from the factory.



UPPLY AND

IPING

• Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union is installed, the union must be downstream of the manual shutoff valve, between the shutoff valve and the furnace.

• Tighten all joints securely.

• Connect the furnace to the building piping by one of the following methods:

– Rigid metallic pipe and fittings. – Semi-rigid metallic tubing and metallic fittings.

Aluminum alloy tubing must not be used in exterior locations.

– Use listed gas appliance connectors in accordance

with their instructions. Connectors must be fully in the same room as the furnace.

– Protect connectors and semi-rigid tubing against

physical and thermal damage when installed. Ensure aluminum-alloy tubing and connectors are coated to protect against external corrosion when in contact with masonry, plaster, or insulation, or subjected to repeated wetting by liquids such as water (except rain water), detergents, or sewage.

Location of Manual Valve

(Installed Ahead of

Ground Joint Pipe Union)

Height Required

By Local Code

Ground Joint Pipe Union

To Be Installed Ahead of

Drip Leg

Gas Valve

When the gas piping enters through the left side of the furnace, the installer must supply the following fittings (starting from the gas valve):

• 90 degree elbow.

• Straight pipe to reach the exterior of the furnace.

• A ground joint union, drip leg, and manual shutoff valve must also be supplied by the installer. In some cases, the installer may also need to supply a transition piece from 1/2 inch to another pipe size.

COUNTERFLOW I NSTALLATIONS

When the gas piping enters through the left side of the furnace, the installer must supply a straight pipe and a 90 degree elbow to reach the exterior of the furnace.

A ground joint union, drip leg and manual shutoff valve must also be supplied by the installer. In most cases, the installer may also need to supply a transition piece from ½” to another pipe size. When the gas piping enters through the right side of the furnace, the installer must supply the following fittings (starting at the gas valve):

• Close Nipple

• 90 Degree Elbow

• Straight Pipe to Reach Exterior of Furnace.

GAS P IPING C HECKS

Before placing unit in operation, leak test the unit and gas connections.

WARNING

TO

AVOIDTHEPOSSIBILITYOFEXPLOSIONORFIRE,NEVERUSEAMATCH

OROPENFLAMETOTESTFORLEAKS



Reducing Coupling

1/2” x 1/8” with 1/8”

Pipe Plug to Measure

Line Gas Pressure

General Furnace Layout

UPFLOW I NSTALLATIONS

When the gas piping enters through the right side of the furnace, the installer must supply the following fittings (starting

from the gas valve):

• Close nipple.

• 90 degree elbows.

• Straight pipe to reach the exterior of the furnace .

A ground joint union, drip leg, and manual shutoff valve must also be supplied by the installer. In some cases, the installer may also need to supply a transition piece from 1/2" to another pipe size.

Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved testing methods.

NOTE: Never exceed specified pressures for testing. Higher pressure may damage the gas valve and cause subsequent overfiring, resulting in heat exchanger failure.

Disconnect this unit and shutoff valve from the gas supply piping system before pressure testing the supply piping system with pressures in excess of 1/2 psig (3.48 kPa).

This unit must be isolated from the gas supply system by closing its manual shutoff valve before pressure testing of gas supply piping system with test pressures equal to or less than 1/2 psig (3.48 kPa).

IRCULATING

AIR

AND

ILTERS

PROPANE G AS T ANKS AND P IPING

WARNING

IF

THEGASFURNACEISINSTALLEDINABASEMENT,ANEXCAVATED

AREAORCONFINEDSPACE,ITISSTRONGLYRECOMMENDEDTO

CONTACTAPROPANESUPPLIERTOINSTALLAGASDETECTINGWARNING

DEVICEINCASEOFAGASLEAK

INCEPROPANEGASISHEAVIERTHANAIR,ANYLEAKINGGASCAN

•



SETTLEINANYLOWAREASORCONFINEDSPACES

•

ROPANEGASODORANTMAYFADE,MAKINGTHEGASUNDETECTABLE



EXCEPTWITHAWARNINGDEVICE

A gas detecting warning system is the only reliable way to detect a propane gas leak. Rust can reduce the level of odorant in propane gas. Do not rely on your sense of smell. Contact a local propane gas supplier about installing a gas detecting warning system. If the presence of gas is suspected, follow the instructions on Page 3 of this manual.

All propane gas equipment must conform to the safety standards of the National Board of Fire Underwriters, NBFU Manual

58.

For satisfactory operation, propane gas pressure must be 10 inch WC at the furnace manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors:

1. Vaporization rate, depending on temperature of the liquid, and “wetted surface” area of the container or containers.

2. Proper pressure regulation. (Two-stage regulation is recommended for both cost and efficiency).

3. Pressure drop in lines between regulators, and between second stage regulator and the appliance. Pipe size will depend on length of pipe run and total load of all appliances.

Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and propane gas suppliers.



200 PSIG Maximum

5 to 15 PSIG (20 PSIG Max.)

Continuous

Second Stage Regulator

11" W.C .

First Stag e Regulator

Propane Gas Installation (Typ.)

PROPANE G AS P IPING C HARTS

Sizing Between First and Second S tage Regulator* Maximum Propane Capacities listed are based on 2 psig pr essure drop at 10 psig setting . Capacities in 1,000 BTU/hour.

Pipe or Tubing

Length,

Feet

10 730 1,700 3,200 5,300 8,300 3,200 7,500 20 500 1,100 2,200 3,700 5,800 2,200 4,200 30 400 920 2,000 2,900 4,700 1,800 4,000 40 370 850 1,700 2,700 4,100 1,600 3,700 50 330 770 1,500 2,400 3,700 1,500 3,400 60 300 700 1,300 2,200 3,300 1,300 310

80 260 610 1,200 1,900 2,900 1,200 2,600 100 22 0 540 1,000 1,700 2,600 1,000 2,300 125 20 0 490 900 1,400 2,300 900 2,100 150 19 0 430 830 1,300 2,100 830 1,900 175 17 0 400 780 1,200 1,900 770 1,700 200 16 0 380 730 1,100 1,800 720 1,500

Sizing Between Second S tage an d Applia nce Regu lator* Maximum P ropane Capacities listed are base d on 2 psig pressure d rop at 10 psig setting. Cap acities in 1,000 B TU/h our.

Pipe or Tubing Length,

Fe et

10 39 92 199 329 501 935 275 567 1 ,071 2,205 3,307 20 26 62 131 216 346 630 189 393 732 1,496 2,299 30 21 50 107 181 277 500 152 315 590 1,212 1,858 40 19 41 90 145 233 427 129 2 67 504 1,039 1,559 50 18 37 79 131 198 376 114 2 37 448 91 1, 417 60 16 35 72 121 187 340 103 2 17 409 834 1,275 80 13 29 62 104 155 289 89 18 5 346 724 1,066

100 11 26 55 90 138 255 78 162 307 630 976 125 10 24 48 81 122 224 69 146 275 567 866 150 9 21 43 72 109 202 63 13 2 252 511 787 200 8 19 39 66 100 187 54 11 2 209 439 665 250 8 17 36 60 93 172 48 100 185 390 590

3/8" 1/2" 5/8" 3/4" 7/8" 1/2" 3/4"

3/8" 1/2" 5/8" 3/4" 7/8" 1-1/8" 1/2" 3/4" 1" 1-1/4" 1-1/2"

Tubing Size, O.D. Type L

Nominal Pipe Size

Schedule 40

Nominal Pipe Size

Schedule 40

Since propane gas will quickly dissolve white lead and most standard commercial compounds, special pipe dope must be used. Shellac-based compounds resistant to the actions of liquefied petroleum gases such as Gasolac®, Stalactic®, Clyde’s® or John Crane® are satisfactory.

Refer to the following illustration for typical propane gas installations and piping.

IRCULATING AIR AND FILTERS

WARNING

EVERALLOWTHEPRODUCTSOFCOMBUSTION,INCLUDINGCARBO N

MONOXIDE,TOENTERTHERETURNDUCTWORKORCIRCULATIONAIR

SUPPLY

Duct systems and register sizes must be properly designed for the CFM and external static pressure rating of the furnace. Ductwork should be designed in accordance with the recommended methods of “Air Conditioning Contractors of America” Manual D.

A duct system must be installed in accordance with Standards of the National Board of Fire Underwriters for the Installation of Air Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets No. 90A and 90B.



TART-UP PROCEDURE

AND

DJUSTMENT

A closed return duct system must be used, with the return duct connected to the furnace. NOTE: Ductwork must never be attached to the back of the furnace. For installations requiring more than 1800 CFM, use a bottom return or two sided return. Supply and return connections to the furnace may be made with flexible joints to reduce noise transmission. To prevent the blower from interfering with combustion air or draft when a central return is used, a connecting duct must be installed between the unit and the utility room wall. A room, closet, or alcove must not be used as a return air chamber.

When the furnace is used in connection with a cooling unit, the furnace should be installed in parallel with or on the upstream side of the cooling unit to avoid condensation in the heating element. With a parallel flow arrangement, the dampers or other means used to control the flow of air must be adequate to prevent chilled air from entering the furnace and, if manually operated, must be equipped with means to prevent operation of either unit unless the damper is in the full heat or cool position.

When the furnace is installed without a cooling coil, it is recommended that a removable access panel be provided in the outlet air duct. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for visual light inspection or such that a sampling probe can be inserted into the airstream. The access panel must be made to prevent air leaks when the furnace is in operation.

To determine total external duct static pressure, proceed as follows;

1. With clean filters in the furnace, use a draft gauge (inclined manometer) to measure the static pressure of the return duct at the inlet of the furnace. (Negative Pressure)

2. Measure the static pressure of the supply duct. (Positive Pressure)

3. The difference between the two numbers is .4” w.c.

Example:

static reading from return duct = -.1" w.c.

static reading from supply duct = .3" w.c.

total external static pressure on this system = .4" w.c.

NOTE: Both readings may be taken simultaneously and read directly on the manometer if so desired. If an air conditioner coil or Electronic Air Cleaner is used in conjunction with the furnace, the readings must also include theses components, as shown in the following drawing.

4. Consult proper tables for the quantity of air.

If the total external static pressure exceeds the maximum listed on the furnace rating plate, check for closed dampers, registers, undersized and/or oversized poorly laid out duct work.

When the furnace is heating, the temperature of the return air entering the furnace must be between 55°F and 100°F.

When a furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by a duct sealed to the furnace casing and terminating outside the space containing the furnace.

CHECKING D UCT S TATIC

Refer to your furnace rating plate for the maximum ESP (external duct static) rating.

Total external static refers to everything external to the furnace cabinet. Cooling coils, filters, ducts, grilles, registers must all be considered when reading your total external static pressure. The supply duct pressure must be read between the furnace and the cooling coil. This reading is usually taken by removing the “A” shaped block off plate from the end on the coil; drilling a test hole in it and reinstalling the block off plate. Take a duct static reading at the test hole. Tape up the test hole after your test is complete. The negative pressure must be read between the filter and the furnace blower.

Too much external static pressure will result in insufficient air that can cause excessive temperature rise. This can cause limit switch tripping and heat exchanger failure.

Checking Static Pressure

(80% Furnace Shown, 90% Similar)

FILTERS - READ T HIS S ECTION B EFORE I NSTALLING T HE RETURN A IR D UCTWORK

Filters must be used with this furnace. Discuss filter maintenance with the building owner. Filters do not ship with this furnace, but must be provided by the installer. Filters must com-

TART-UP

ROCEDURE

AND

DJUSTMENT

ply with UL900 or CAN/ULCS111 standards. If the furnace is installed without filters, the warranty will be voided.

NOTE: An undersized opening will cause reduced airflow. The bottom return is set up as a knock out.

UPRIGHT I NSTALLATIONS

Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the central return register or a side panel external filter rack kit (upflows), or the ductwork above a downflow furnace. As an alternative, a media air filter or electronic air cleaner can be used as the primary filter.

CIRCULATION A IR F ILTERS

One of the most common causes of a problem in a forced air heating system is a blocked or dirty filter. Circulating air filters must be inspected monthly for dirt accumulation and replaced if necessary. Failure to maintain clean filters can cause premature heat exchanger failure.

A new home may require more frequent replacement until all construction dust and dirt is removed. Circulating air filters are to be installed in the return air duct external to the furnace cabinet.

M INIM UM FILTER SIZES for DISPOSABL E FILTERS

FURNACE INPUT FILTER SIZE

70M 768 in 90M 960 in

115M 1022 in

DISPOSABLE NOMINA L 300 F.M . FACE VELOCITY

HORIZONTAL I NSTALLATIONS

Filters must be installed in either the central return register or in the return air duct work.

TART-UP PROCEDURE AND ADJUSTMENT

Furnace must have a 115 VAC power supply properly connected and grounded. Proper polarity must be maintained for correct operation. In addition to the following start-up and adjustment items, refer to further information in Operational Checks section.

HEAT A NTICIPATOR S ETTING

The heat anticipator in the room thermostat must be correctly adjusted to obtain the proper number of cycles per hour and to prevent “overshooting” of the setting. Set the heat anticipator setting to 0.7 amps. Follow the thermostat manufacturer’s instructions on how to adjust the heat anticipator setting.

FURNACE O PERATION

Purge gas lines of air prior to startup. Be sure not purge lines into an enclosed burner compartment.

Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other

approved method. Verify that all required kits (propane gas, high altitude, etc.) have been appropriately installed.

FURNACE S TARTUP

1. Close the manual gas shutoff valve external to the furnace.

2. Turn off the electrical power to the furnace.

3. Set the room thermostat to the lowest possible setting.

4. Remove the burner compartment door.

NOTE: This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

5. Move the furnace gas valve manual control to the OFF position.

6. Wait five minutes then smell for gas. Be sure check near the floor as some types of gas are heavier than air.

7. If you smell gas after five minutes, immediately follow the Safety Instructions on page 2 of this manual. If you do not smell gas after five minutes, move the furnace gas valve manual control to the ON position.

8. Replace the burner compartment door.

9. Open the manual gas shutoff valve external to the furnace.

10. Turn on the electrical power to the furnace.

11. Adjust the thermostat to a setting above room temperature.

12. After the burners are lit, set the thermostat to desired temperature.

FURNACE S HUTDOWN

1. Set the thermostat to the lowest setting. The integrated control will close the gas valve and

extinguish flame. Following a 15 second delay, the induced draft blower will be de-energized. After a 120, 150, 180 or 210-second delay period (field selectable delay OFF [90, 120, 150, 180] plus 30-second ramp down), the circulator blower de-energizes.

2. Remove the burner compartment door and move the furnace gas valve manual control to the OFF position.

3. Close the manual gas shutoff valve external to the furnace.

4. Replace the burner compartment door.

GAS S UPPLY P RESSURE M EASUREMENT

CAUTION

TO

PREVENTUNRELIABLEOPERATIONOREQUIPMENTDAMAGE,THE

INLETGASSUPPLYPRESSUREMUSTBEASSPECIFIEDONTHEUNIT

RATINGPLATEWITHALLOTHERHOUSEHOLDGASFIREDAPPLIANCES

OPERATING

The line pressure supplied to the gas valve must be within the range specified below. The supply pressure can be measured at the gas valve inlet pressure boss or at a hose fitting installed in the gas piping drip leg. The supply pressure must be measured with the burners operating. To measure the gas supply pressure, use the following procedure.



TART-UP PROCEDURE

INLET OUTLET

AND

DJUSTMENT

Common

o e

Terminal(C)

High Fire Coil Terminal (HI)

Low Fire Coil Terminal (LO)

Gas Valve On/Off Selector Switch

White-Rodgers Model 36G54 (Two-Stage)

Open to

Atmosphere

Inlet Pressure Boss

Outlet

Pressure Boss

High Fire Regulator

(

)

Adjust

Common Terminal(C)

White-Rodgers Model 36G54 Connected to Manometer

High Fire

Regulator Vent

Gas Valve On/Off Selector Switch

Regulator Adjust

Low Fire Regulator Adjust

Honeywell Model VR9205 (Two-Stage)

Regulator

Vent

Low Fire Regulator Adjust

(

Inlet Pressure Tap 1/8 NPT

Outlet Pressure Tap 1/8 NPT

Honeywell Model VR9205 Connected to Manometer

1. Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.

2. Connect a calibrated water manometer (or appropriate gas pressure gauge) at either the gas valve inlet pressure

)

boss or the gas piping drip leg. See Honeywell VR9205 gas valve figure or White-Rodgers 36G54 gas valve figure for location of inlet pressure boss.

NOTE: If measuring gas pressure at the drip leg or Honeywell VR9205 gas valve, a field-supplied hose barb fitting must be installed prior to making the hose connection. If using the inlet pressure boss on the White-Rodgers 36G54 gas valve, then use the 36G Valve Pressure Check Kit, Goodman Part No. 0151K00000S.

3. Turn ON the gas supply and operate the furnace and all other gas consuming appliances on the same gas supply line.

4. Measure furnace gas supply pressure with burners firing. Supply pressure must be within the range specified in the Inlet Gas Supply Pressure table.

Inlet Gas Supply Pressure

Natural Gas

Propane Gas

Minimum: 5.0" w.c. Maximum:10.0" w.c. Minimum: 11.0" w.c. Maximum:13.0" w.c.

If supply pressure differs from table, make the necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility.

5. Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. Reinstall plug before turning on gas to furnace.

6. Turn OFF any unnecessary gas appliances stated in step 3.

TART-UP

ROCEDURE

AND

DJUSTMENT

Gas Line

Gas Shutoff Valve

Gas Line To Furnace

Open To Atmosphere

Drip Leg Cap With Fitting

Manometer Hose

Manometer

Measuring Inlet Gas Pressure (Alt. Method)

GAS M ANIFOLD P RESSURE M EASUREMENT AND A DJUSTMENT

CAUTION

TO

PREVENTUNRELIABLEOPERATIONOREQUIPMENTDAMAGE,THE

GASMANIFOLDPRESSUREMUSTBEASSPECIFIEDONTHEUNITRATING

PLATE

.O

NLYMINORADJUSTMENTSSHOULDBEMADEBYADJUSTING

THEGASVALVEPRESSUREREGULATOR



9. Close thermostat “R” and “W2” contacts to provide a call for high stage heat.

10. Remove regulator cover screw from the high (HI) outlet pressure regulator adjust tower and turn screw clockwise to increase pressure or counterclockwise to decrease pressure. Replace regulator cover screw.

11. Turn off all electrical power and gas supply to the system.

12. Remove the manometer hose from the hose barb fitting or outlet pressure boss.

13. Replace outlet pressure tap:

a. Honeywell VR9205 valve: Remove the 1/8" NPT hose

barb fitting from the outlet pressure tap. Replace the outlet pressure boss plug and seal with a high quality thread sealer.

b. White-Rodgers 36G54 valve: Turn outlet pressure test

screw in to seal pressure port (clockwise, 7 in-lb minimum).

14. Turn on electrical power and gas supply to the system.

15. Close thermostat contacts “R” and “W1/W2” to energize the valve.

Using a leak detection solution or soap suds, check for leaks at outlet pressure boss plug (Honeywell valve) or screw (WhiteRodgers valve). Bubbles forming indicate a leak. SHUT OFF GAS AND REPAIR ALL LEAKS IMMEDIATELY! NOTE: For gas to gas conversion, consult your dealer for appropriate conversion.

Only small variations in gas pressure should be made by adjusting the gas valve pressure regulator. The manifold pressure must be measured with the burners operating. To measure and adjust the manifold pressure, use the following procedure.

1. Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.

2. Turn off all electrical power to the system.

3. Outlet pressure tap connections:

a. Honeywell VR9205 valve: Remove the outlet pressure

boss plug. Install an 1/8" NPT hose barb fitting into the outlet pressure tap.

b. White-Rodgers 36G54 valve: Back outlet pressure test

screw (inlet/outlet pressure boss) out one turn (counterclockwise, not more than one turn).

4. Attach a hose and manometer to the outlet pressure barb fitting (Honeywell valve) or outlet pressure boss (White-Rodgers valve).

5. Turn ON the gas supply.

6. Turn on power and close thermostat “R” and “W1” contacts to provide a call for low stage heat.

7. Measure the gas manifold pressure with burners firing. Adjust manifold pressure using the Manifold Gas Pressure table shown below.

8. Remove regulator cover screw from the low (LO) outlet pressure regulator adjust tower and turn screw clockwise to increase pressure or counterclockwise to decrease pressure. Replace regulator cover screw.

Manifold Gas Pressure

Gas

Natural Low Stage 1.6 - 2.2" w .c. 1.9" w .c.

High Stage 3.2 - 3.8" w .c. 3.5" w .c.

Propane Low Stage 5.7 - 6.3" w .c . 6.0" w .c.

High Stage 9.7 - 10.3" w .c

Range Nominal

10.0" w .c.

GAS I NPUT R ATE M EASUREMENT (NATURAL G AS O NLY)

The gas input rate to the furnace must never be greater than that specified on the unit rating plate. To measure natural gas input using the gas meter, use the following procedure.

1. Turn OFF the gas supply to all other gas-burning appliances except the furnace.

2. While the furnace is operating, time and record one complete revolution of the smallest gas meter dial.

3. Calculate the number of seconds per cubic foot (sec/ft3) of gas being delivered to the furnace. If the dial is a one cubic foot dial, divide the number of seconds recorded in step 2 by one. If the dial is a two cubic foot dial, divide the number of seconds recorded in step 2 by two.

TART-UP PROCEDURE

AND

DJUSTMENT

4. Calculate the furnace input in BTUs per hour (BTU/hr). Input equals the sum of the installation’s gas heating value and a conversion factor (hours to seconds) divided by the number of seconds per cubic foot. The measured input must not be greater than the input indicated on the unit rating plate.

EXAMPLE: Installation’s gas heating (HTG) value: 1,000 BTU/ft

(Obtained from gas supplier) Installation’s seconds per cubic foot: 34 sec/ ft

Conversion Factor (hours to seconds): 3600 sec/hr Input = (Htg. value x 3600) ÷ seconds per cubic foot Input = (1,000 BTU/ft3 x 3600 sec/hr) ÷ 34 sec/ ft

Input = 106,000 BTU/hr

Minor changes to the input rate may be accomplished through manifold pressure adjustments at the gas valve. Refer to Sec-

tion XIV, Startup Procedure and Adjustment - Gas Manifold Pressure Measurement and Adjustment for details. NOTE:

The final manifold pressure cannot vary by more than ± 0.3” w.c. from the specified setting. Consult your local gas supplier if additional input rate adjustment is required.

5. Repeat steps 2 through 4 on high stage.

6. Turn ON gas to and relight all other appliances turned off in step 1. Be certain that all appliances are functioning properly and that all pilot burners are operating.

TEMPERATURE R ISE

Temperature rise must be within the range specified on the unit rating plate. An incorrect temperature rise may result in condensing in or overheating of the heat exchanger. An airflow and temperature rise table is provided in the Specification Sheet applicable to your model. Determine and adjust temperature rise as follows:

1. Operate furnace with burners firing for approximately ten minutes. Ensure all registers are open and all duct dampers are in their final (fully or partially open) position.

2. Place thermometers in the return and supply ducts as close to the furnace as possible. Thermometers must not be influenced by radiant heat by being able to “see” the heat exchanger.

3. Subtract the return air temperature from the supply air temperature to determine the air temperature rise. Allow adequate time for thermometer readings to stabilize.

4. Adjust temperature rise by adjusting the circulator blower speed. Increase blower speed to reduce temperature rise. Decrease blower speed to increase temperature rise. Refer to Startup Procedure and Adjustment -Circulator Blower Speeds for speed changing details.

HEAT EXCHANGER

RADIATION "LINE OF SIGHT"

SUPPLY AIR

SUPPLY

RISE =

SUPPLY

RETURN

RETURN AIR

Temperature Rise Measurement

CIRCULATOR B LOWER S PEEDS

WARNING

TO

AVOIDPERSONALINJURYORDEATHDUETOELECTRICALSHOCK

TURN

OFF

POWERTOTHEFURNACEBEFORECHANGINGSPEEDTAPS

This furnace is equipped with a multi-speed circulator blower. This blower provides ease in adjusting blower speeds. The Specification Sheet applicable to your model provides an airflow table, showing the relationship between airflow (CFM) and external static pressure (E.S.P.), for the proper selection of heating and cooling speeds. The heating blower speed is shipped set at “B”, and the cooling blower speed is set at “D”. These blower speeds should be adjusted by the installer to match the installation requirements so as to provide the correct heating temperature rise and correct cooling CFM.

Use the dual 7-segment LED display adjacent to the dipswitches to obtain the approximate airflow quantity. The airflow quantity is displayed as a number on the display, rounded to the nearest 100 CFM. The display alternates airflow delivery indication and the operating mode indication.

Example: The airflow being delivered is 1225 CFM. The display indicates 12. If the airflow being delivered is 1275, the display indicates 13.

1. Determine the tonnage of the cooling system installed with the furnace. If the cooling capacity is in BTU/hr divide it by 12,000 to convert capacity to TONs.

Example: Cooling Capacity of 30,000 BTU/hr.

30,000/12,000 = 2.5 Tons

2. Determine the proper air flow for the cooling system. Most cooling systems are designed to work with air flows between 350 and 450 CFM per ton. Most manufacturers recommend an air flow of about 400 CFM per ton.

Example: 2.5 tons X 400 CFM per ton = 1000 CFM

,

The cooling system manufacturer’s instructions must be checked for required air flow. Any electronic air cleaners or other devices may require specific air flows, consult installation instructions of those devices for requirements.

3. Knowing the furnace model, locate the high stage cooling air flow charts in the Specification Sheet applicable to your model. Look up the cooling air flow determined in step 2 and find the required cooling speed and adjustment setting.

Example: A *MVC80704BX furnace installed with a 2.5

ton air conditioning system. The air flow needed is 1000 CFM. Looking at the cooling speed chart for *MVC80704BX, find the air flow closest to 1000 CFM. A cooling airflow of 990 CFM can be attained by setting the cooling speed to “C” and the adjustment to “-” (minus).

4. Continuous fan speed is 30% of the furnace’s maximum airflow capability.

Example: If the furnace’s maximum airflow capability

is 2000 CFM, the continuous fan speed will be 0.30 x 2000 CFM = 600 CFM.

5. Locate the blower speed selection DIP switches on the integrated control module. Select the desired “cooling” speed tap by positioning switches 1 and 2 appropriately. Select the desired “adjust” tap by positioning switches 3 and 4 appropriately. Refer to the following figure for switch positions and their corresponding taps. Verify CFM by noting the number displayed on the dual 7segment LED display.

6. The multi-speed circulator blower also offers several custom ON/OFF ramping profiles. These profiles may be used to enhance cooling performance and increase comfort level. The ramping profiles are selected using DIP switches 5 and 6. Refer to the following figure for switch positions and their corresponding taps. Refer to the bullet points below for a description of each ramping profile. Verify CFM by noting the number displayed on the dual 7-segment LED display.

Switch B ank: S4

Ramp ing

Profiles

A* O FF OFF

BONOFF

COFFON

DONON

(*Indicates factor y setting)

• Profile A provides only an OFF delay of one (1) minute at 100% of the cooling demand airflow.

DIP Switch No.

TART-UP

OFF

ROCEDURE

100% CFM 100% CFM

AND

DJUSTMENT

1 min

• Profile B ramps up to full cooling demand airflow by first stepping up to 50% of the full demand for 30 seconds. The motor then ramps to 100% of the required airflow. A one (1) minute OFF delay at 100% of the cooling airflow is provided.

OFF

50% CFM

1/2 min

100% CFM

1 min

• Profile C ramps up to 85% of the full cooling demand airflow and operates there for approximately 7 1/2 minutes. The motor then steps up to the full demand airflow. Profile C also has a one (1) minute 100% OFF delay.

OFF

Swi tch Bank: S3

Cooling

Airflow

AOFFOFF

BONOFF

COFFON

D* ON ON

(*Indicates factory setting)

Switch Bank: S3

Adjust Taps

Norma l* OFF OFF

10% O N OFF

-10% OFF ON

Normal ON ON

(*Indicates factory se tting)

100% CFM

DIP Switch No .

DIP Switch No.

• Profile D ramps up to 50% of the demand for 1/2 minute, then ramps to 85% of the full cooling demand airflow and operates there for approximately 7 1/2 minutes. The motor then steps up to the full demand airflow. Profile D has a 1/2 minute at 50% airflow OFF delay.

OFF

TART-UP PROCEDURE

AND

DJUSTMENT

7. Select the heating speed for your model from the heating speed chart in the Specification Sheet. The adjust setting (already established by the cooling speed selection) determines which set of speeds are available. The selected speed must provide a temperature rise within the rise range listed with the particular model.

Example: The *MVC80704BX is set for 990 CFM on

cooling, the “ADJUST” is set to “+” (plus). The four heating speeds available are “A Plus”, “B Plus”, “C Plus”, and “D Plus”. “A Plus” has a rise of 38°F for both stages which is within the 20-50°F rise range for the *MVC80704BX . This setting will keep electrical consumption to a minimum. Set the “Heat” speed DIP switches to “A”.

Switch Bank: S4

Heating

Airflow

DIP Swi tch No.

AOFFOFF

B* ON OFF

COFFON

DONON

(*Indicates factory setting)

8. Select the desired “heating” speed tap by positioning switches 7 and 8 appropriately. Refer to figure above. Verify CFM by noting the number displayed on the dual 7-segment LED display.

In general lower heating speeds will: reduce electrical consumption, lower operating sound levels of the blower, and increase the outlet air temperature delivered to the home. The speeds available allow the blower performance to be optimized for the particular homeowner’s needs.

BLOWER H EAT O FF D ELAY T IMINGS

The integrated control module provides a selectable heat off delay function. The heat off delay period may be set to 90, 120, 150, 180 seconds using the DIP switches or jumper provided on the control module. The delay is factory shipped at 150 seconds but may be changed to suit the installation requirements and/or homeowner preference. Refer to the following figures for switch positions and corresponding delay times.

Switch B ank: S1

Heat OFF Del ay

90 seconds OFF OFF

120 seconds ON OFF

150 seconds * OFF ON

180 seconds ON ON

(*Indicates factory setting)

Heat Off Delay Dipswitches

DIP Switch No.

Speed Selection Dip Switches

Cool Adjust Profile Heat Selection Selection Selection Selection Switches Switches Switches Switches

TAP 1 2 3 4 5 6 7 8

A OFF OFF OFF OFF OFF OFF OFF OFF

B ON OFF ON OFF ON OFF ON OFF

C OFF ON OFF ON OFF ON OFF ON

D ON ON ON ON ON ON ON ON

Profiles Pre-Run Short-Run OFF Delay

A ------- -------- 60 sec/100%

B ------- 30 sec/50% 60 sec/100%

C ------- 7.5 min/82% 60 sec/100%

D 30 sec/50% 7.5 min/82% 30 sec/50%

To set airflow:

(1) Select model and desired high stage cooling airflow. Determine the corresponding tap ( A, B, C, or D ). Set dip switches 1 and 2 to the appropriate ON / OFF positions. ( 2) Select model and desired high stage heating airflow. Determine the corresponding tap ( A, B, C, or D ). Set dip switches 7 and 8 to the appropriate ON / OFF positions. (3) Select the airflow adjustment factor taps A and D are 1; Tap B is +10%; Tap C -10%. Set dip switches 3 and 4 to the appropriate ON / OFF positions.

To set Comfort Mode:

Select desired Comfort Mode profile (see profiles above). Set switches 5 and 6 to the appropriate ON / O FF positions.

Model Tap Low Stage High Stage Low Stage High Stage Cool Cool Heat Heat

735 805 875 935

945

1015

1085

1155

1085

1155 1225 1260

875

945

1015

1085

1050

1120

1190 1260

1210 1225 1245 1260

1750

1800

*DVC80703BX*

*DVC80905CX*

*DVC81155CX*

*MVC80704BX*

*MVC80905CX*

*MVC81155CX*

390

B C D

C D

A B

C D

A B C D

A B

C D

A B C D

520 650 780

520

715 910

1170 553

748

943

1203

390 520

715 910

520

715 910

1170 520

715 910

1175

600

800 1000 1200

800

1100 1400 1800

850

1150 1450 1850

600 800

1100

1400

800

1100 1400 1800

800

1100 1400 1800

NOTE: Airflow data shown applies to legacy mode operation only. For a fully communicating system, please see the outdoor unit’s installation instructions for cooling and pump heating airflow data. See ComfortNet™ System - Airflow Consideration section for details.

1050

1150 1250 1350

1350 1450 1550 1650

1550 1650 1750 1800

1250 1350 1450 1550

1500 1600 1700 1800

1725

1775

COMFORTNET™ SYSTEM

OMFORTNET

™ S

YSTEM

OVERVIEW

The ComfortNet system (or CT system) is a system that includes a ComfortNet compatible furnace and air conditioner or heat pump with a CTK01AA thermostat. A valid ComfortNet system could also be a compatible furnace, CTK01AA thermostat and non-compatible, single stage air conditioner. Any other system configurations are considered invalid ComfortNet systems and must be connected as a traditional (or legacy) system (see Electrical Connections for wiring connections). The table below compares the valid CT systems.

CT compatible

Fur nace

CT compatible

Fur nace

CT compatible

Fur nace

CT compatible

Air Conditi oner

CT compatible

Heat P u mp

Non-CT compatible

Single Stage

Air Conditi oner

Full CT sy stem

benefits and features

Full CT sy stem

benefits and features

CT sy stem

benefits and features

for furnace only

A ComfortNet heating/air conditioning system differs from a legacy/traditional system in the manner in which the indoor unit, outdoor unit and thermostat interact with one another. In a traditional system, the thermostat sends commands to the indoor and outdoor units via analog 24 VAC signals. It is a oneway communication path in that the indoor and outdoor units typically do not return information to the thermostat.

On the other hand, the indoor unit, outdoor unit, and thermostat comprising a ComfortNet system “communicate” digitally with one another. It is now a two-way communications path. The thermostat still sends commands to the indoor and outdoor units. However, the thermostat may also request and receive information from both the indoor and outdoor units. This information may be displayed on the CT thermostat. The indoor and outdoor units also interact with one another. The outdoor unit may send commands to or request information from the indoor unit. This two-way digital communications between the thermostat and subsystems (indoor/outdoor unit) and between subsystems is the key to unlocking the benefits and features of the ComfortNet system.

Two-way digital communications is accomplished using only two wires. The thermostat and subsystem controls are power with 24 VAC. Thus, a maximum of 4 wires between the equipment and thermostat is all that is required to operate the system.

AIRFLOW CONSIDERATIONS

Airflow demands are managed differently in a fully communicating system than they are in a legacy wired system. The system operating mode (as determined by the thermostat) determines which unit calculates the system airflow demand. If the indoor unit is responsible for determining the airflow demand, it calculates the demand and sends it to the

ECM motor. If the outdoor unit or thermostat is responsible for determining the demand, it calculates the demand and transmits the demand along with a fan request to the indoor unit. The indoor unit then sends the demand to the ECM motor. The table below lists the various ComfortNet systems, the operating mode, and airflow demand source.

Sys te m

Air Conditioner +

Fur nace

Hea t Pump +

Fur nace

Furnace + Non-

Comm 1s tg A ir

Conditioner

System

Operating Mode

Cooling Air Conditioner

Heating Furnace

Continuous Fan Thermostat

Cooling Heat Pump

Hea t Pump He ating

Only

Auxiliary Heating Furnace

Continuous Fan Thermostat

Cooling Furnace

Heating Furnace

Continuous Fan Thermostat

Airflow De m and

Source

Hea t Pump

For example, assume the system is an air conditioner matched with a furnace. With a call for low stage cooling, the air conditioner will calculate the system’s low stage cooling airflow demand. The air conditioner will then send a fan request along with the low stage cooling airflow demand to the furnace. Once received, the furnace will send the low stage cooling airflow demand to the ECM motor. The ECM motor then delivers the low stage cooling airflow. See the applicable ComfortNet™ air conditioner or heat pump installation manual for the airflow delivered during cooling or heat pump heating.

In continuous fan mode, the CTK01AA thermostat provides the airflow demand. The thermostat may be configured for a low, medium, or high continuous fan speed. The low, medium, and high fan speeds correspond to 25%, 50%, and 75%, respectively, of the furnaces’ maximum airflow capability. During continuous fan operation, the thermostat sends a fan request along with the continuous fan demand to the furnace. The furnace, in turn, sends the demand to the ECM motor. The ECM motor delivers the requested continuous fan airflow.

COMFORTNET™ SYSTEM

FOSSIL F UEL A PPLICATIONS

This furnace can be used in conjunction with a ComfortNet™ compatible heat pump in a fossil fuel application. A fossil fuel application refers to a combined gas furnace and heat pump installation which uses an outdoor temperature sensor to determine the most cost efficient means of heating (heat pump or gas furnace). When used with the CTK01AA thermostat, the furnace/heat pump system is automically configured as a fossil fuel system. The balance point temperature may be adjusted via the CTK01AA thermostat advanced user menus (see CTK01AA instructions for additional information).

CTK01AA WIRING

NOTE: Refer to Electrical Connections for 115 volt line

connections to the furnace.

NOTE: A removable plug connector is provided with the control to make thermostat wire connections. This plug may be removed, wire connections made to the plug, and replaced. It is strongly recommended that multiple wires into a single terminal be twisted together prior to inserting into the plug connector. Failure to do so may result in intermittent operation.

Typical 18 AWG thermostat wire may be used to wire the system components. One hundred (100) feet is the maximum length of wire between indoor unit and outdoor unit, or between indoor unit and thermostat. Wire runs over (100) feet require larger gauge wire.

FOUR-WIRE I NDOOR AND O UTDOOR W IRING

Typical ComfortNet™ wiring will consist of four wires between the indoor unit and outdoor unit and between the indoor unit and thermostat. The required wires are: (a) data lines, 1 and 2; (b) thermostat “R” (24 VAC hot) and “C” (24 VAC common).

CTK01AA

12RC

Thermostat

Four wires are required between the indoor unit and thermostat.

NOTE: Use of the CTK01AA transformer is recommended if installing a dual fuel/fossil fuel system. Failure to use the transformer in the outdoor unit could result in over loading of the furnace transformer.

CTK01AA

12RC

40VA Transformer (included in CTK01AA kit)

208/230 VAC

System Wiring using Two-Wires between Furnace and AC/HP

and Four-Wires between Furnace and Thermostat

24 VAC

Thermostat

CT Compatible Furnace Integrated Control Module

CT Compatible AC/HP Integrated Control Module

CT COMPATIBLE FURNACE WITH NON-CT COMPATIBLE SINGLE- STAGE A IR C ONDITIONER

Four wires are required between the furnace and thermostat. Two wires are required between the furnace control and single stage air conditioner. For this system configuration, the “Y1” terminal on the integrated furnace control becomes an output rather than an input. The “Y1” connection to the outdoor unit is made using both 4position thermostat connectors in the CTK01AA kit. Remove the red keying tabs from the on-board connector block and position both 4-position connectors such that “1”, “2”, “R”, “C”, and “Y1” positions are filled.

CTK01AA Thermostat

12RC

4-Position Connectors from CTK01AA Thermostat Kit

12RC

System Wiring using Four-Wires

CT Compatible Furnace Integrated Control Module

CT Compatible AC/HP Integrated Control Module

TWO-WIRE O UTDOOR, FOUR-WIRE INDOOR W IRING

Two wires can be utilized between the indoor and outdoor units. For this wiring scheme, only the data lines, 1 and 2, are needed required between the indoor and outdoor units. A 40VA, 208/ 230 VAC to 24VAC transformer must be installed in the outdoor unit to provide 24VAC power to the outdoor unit’s electronic control. The transformer is included with the CTK01AA kit. See kit instructions for mounting and wiring instructions.

12RC

W1 W2 Y1 Y2

C Y

System Wiring between Furnace and Non-CT Compatible

Single Stage Air Conditioner

Non-CT Compatible Single Stage AC

CT Compatible Furnace Integrated Control Module

COMFORTNET S YSTEM A DVANCED F EATURES

The ComfortNet system permits access to additional system information, advanced setup features, and advanced diagnostic/troubleshooting features. These advanced features are organized into a menu structure. The menus are accessed and navigated as described in the following section.

COMFORTNET™ SYSTEM

ACCESSING AND N AVIGATING THE A DVANCED F EATURES M ENUS

The advanced system features are accessed using the ComfortNet thermostat. These advanced features are accessed as follows:

• On the CT thermostat Home Screen Display, touch the Menu key to display additional key choices.

• Touch and hold the Installer Config key for approximately 3 seconds to enter the Thermostat Options Configuration menu.

• Touch and hold the Installer Config key again for approximately 3 seconds to enter the Advanced Installer Configuration menu.

Set Time

Clean D isplay

Installer

Conf ig

Schedu le

Upon entering the advanced menus, the Advanced Fault Menu is displayed. The display will change to the Fault Screen and indicate any faults that may be present in the indoor or outdoor equipment. If a fault is present, the Fault Screen will show the equipment and an error code with a description of the fault.

Touch _ or + keys to view the fault status of any remaining equipment. The text “NO FAULTS” will be scrolled if no errors are present.

Run

Set

Schedule

the change is not accepted, the display will show “FAIL” then revert to the Fault Screen.

Some parameters being displayed switch between the item name and the item value. Touch the Hold key to momentarily stop the display from switching.

To exit an equipment submenu and revert back to the equipment menus, touch the Menu key. Touch Menu again to revert back to the Thermostat Options Menu. Touch the Run Sched- ule key to step out of all menus and back to the CT thermostat Home Screen Display.

THERMOSTAT M ENU

If this furnace is installed with a CT compatible heat pump, the system is recognized as a dual fuel system. The balance point temperature should be set via the thermostat advanced menu. Navigate to the THERMOSTAT menu. Press the IN- STALLER CONFIG key. Navigate to the SETUP menu and press the INSTALLER CONFIG button. Navigate to dF BAL PNT. Adjust the dual fuel system balance point using the back/ forward arrows.

DIAGNOSTICS

Accessing the furnace’s diagnostics menu provides ready access to the last six faults detected by the furnace. Faults are stored most recent to least recent. Any consecutively repeated fault is stored a maximum of three times. Example: A clogged return air filter causes the furnace limit to trip repeatedly. The control will only store this fault the first three consecutive times the fault occurs. Navigate to the diagnostics menu as described above in Accessing and Navigating the Advanced Features Menus.

NOTE: It is highly recommended that the fault history be cleared when performing maintenance or servicing the furnace.

Call for Service

Advanced

Run

Schedule

Call for Service

Advanced

Run

Schedule

Touch the + or _ to step through the list of installed equipment, including the thermostat. Touch the Installer Config key to enter the submenus for the equipment displayed. The text “WORKING” will be displayed in the scrolling display area while the data is being retrieved. The first sub-menu is then displayed. See tables below for listing of furnace submenus.

Touch the + or _ to step through the list of submenus and

view settings. If a setting can be adjusted, _ and + keys will

appear. Use the _ or + keys to adjust the setting to the

desired value. Touch the + or _ to step to the next item.

“WORKING” will appear as the settings are being updated. “DONE” will appear to indicate the change was accepted. If

COMFORTNET™ SYSTEM

FURNACE A DVANCED F EATURES M ENUS

CONFIGURATION

Submenu Item Indication (for Display Only; not User Modifiable)

Number of Heat Stages (HT STG) Displays the number of furnace heating stages

Input Rate (BTU/HR) Displays the furnace input rate in kBtu/hr Motor HP (1/2, ¾, or 1 MTR HP) Displays the furnace indoor blower motor horsepower

DIAGNOSTICS

Submenu Item Indication/User Modifiabl e Options Comments

Fault 1 (FAULT #1) Most recent furnace fault For display only

Fault 2 (FAULT #2) Next most recent furnace fault For display only

Fault 3 (FAULT #3) Next most recent furnace fault For display only

Fault 4 (FAULT #4) Next most recent furnace fault For display only

Fault 5 (FAULT #5) Next most recent furnace fault For display only

Fault 6 (FAULT #6) Least recent furnace fault For display only

Clear Fault History (CLEAR) NO or YES

NOTE:

Consecutively repeated faults are shown a maximum of 3 times

Selecting “YES” clears the fault history

IDENTIFICATION

Submenu Item Indication (for Display Only; not User Modifiable)

Model Number (MOD NUM) Displays the furnace model number

Serial Number (SER NUM) Displays the furnace serial number (Optional) Software (SOFTWARE) Displays the application software revision

SET-UP

Submenu Item User Modifiable Options Com ments

Heat Airflow Trim (HT TRM) -10% to +10% in 2% increments,

default is 0%

Heat ON Delay (HT ON 5, 10, 15, 20, 25, or 30 seconds,

default is 30 seconds

Heat OFF Delay (HT OFF) 30, 60, 90, 120, 150, or 180 seconds,

default is 150 seconds

Heat Airflow (HT ADJ) 1, 2, 3, or 4 Selects the nominal heating airflow (see

STATUS

Submenu Item Indication (for Display Only; not User Modifiable)

Mode (MODE) Displays the current furnace operating mode CFM (CFM) Displays the airflow for the current operating mode

Trims the heating airflow by the selected amount.

Selects the indoor blower heat ON delay

Selects the indoor blower heat OFF delay

Startup Procedure and Adjustment – Circulator Blower Speeds for addition

information)

COMFORTNET™ SYSTEM

NON-COMM (APPLIES ONLY TO A C T COMPATIBLE FURNACE MATCHED

WITH A NON-CT COMPATIBLE SINGLE STAGE AIR CONDITIONER)

Submenu Item User Modifiable Options Comments

Cool Airflow (CL CFM) 18, 24, 30, 36, 42, 48, or 60, default

is 18

Selects the airflow for the non-CT compatible single stage AC unit

Cool Airflow Trim (CL TRM) -10% to +10% in 2% increments,

default is 0%

Selects the airflow trim amount for the nonCT compatible single stage AC unit

Cool Airflow Profile (CL PRFL) A, B, C, or D, default is A Selects the airflow profile for the non-CT

compatible single stage AC unit

Cool ON Delay (CL ON) 5, 10, 20, or 30 seconds, default is

5 seconds

Cool OFF Delay (CL OFF) 30, 60, 90, or 120 seconds, default

is 30 seconds

NETWORK TROUBLESHOOTING

Communications is achieved by taking the difference between two dc signals. The signals and transmission lines are referred to as “data 1” and “data 2”. Each transmission line is biased to approximately 2.5Vdc. During data recep-

shoot the network may arise. The integrated furnace control has some on-board tools that may be used to troubleshoot the network. These tools are: red communications LED, green receive (Rx) LED, and learn button.

• Red communications LED – Indicates the status of

tion/transmission, the data lines vary between +5V and ground. (When data 1 is increasing towards +5V, data 2 is decreasing towards ground and when data 1 is decreasing

• Green receive LED – Indicates network traffic. The towards ground, data 2 is increasing towards +5V. Typically, the data 1 line is approximately 2.6Vdc and the data 2 transmission line is approximately 2.3Vdc. The voltage

• Learn button – Used to reset the network. Depress difference between data 1 and data 2 is typically 0.2 to 0.6 Vdc.

the network. The table below indicates the LED status and the corresponding potential problem.

table below indicates the LED status and the corresponding potential problem.

the button for approximately 2 seconds to reset the network.

Selects the indoor blower ON delay for the non-CT compatible s ingle stage AC unit

Selects the indoor blower OFF delay for the non-CT compatible s ingle stage AC unit

The indoor control is equipped with a bank of three dipswitches that provide biasing and termination functions for the communications transmission lines. The outdoor control in the CT compatible unit is equipped with a bank of two dipswitches that provide termination functions for the communications transmission lines. Communications errors will result if these switches are not correctly set. The table below indicates the switch position for the bias and termination dipswitches along with the expected voltages. Note that the ON position is the correct position for all bias and termination dipswitches.

ONOFF

BIAS

TERM

Indoor Unit BIAS and TERMINATION Dipswitches

The ComfortNet system is a fully communicating system, and thus, constitutes a network. Occasionally the need to trouble-

SYSTEM T ROUBLESHOOTING

NOTE: Refer to the instructions accompanying the CT

compatible outdoor AC/HP unit for troubleshooting information.

Refer to the Troubleshooting Chart in the Appendix for a listing of possible furnace error codes, possible causes and corrective actions.

PERATIONAL

HECKS

& S

AFETY

IRCUIT

ESCRIPTION

LED LED

Status

1 Flash

Red

Communications

LED

2 Flashes

1 Steady

Flash

Green Receive

LED

Rapid

Flashing On Solid

Off

Indication Possible Causes Corrective Action(s) Notes & Cautions

x Normal condition x None x None x None x Communications

Failure

x Out-of-box reset x Control power up

x No power x Communications

error

x No network found x Broken/ disconnected

x Normal network

traffic

x Data 1/ Data 2

miss-wire

x Communications

Failure

x Learn button

depressed

x No power to furnace x Open fuse x Communications error

data wire(s)

x Furnace is installed as

a legacy/ traditional system

x Control is “talking” on

network as expected

x Data 1 and data 2

wires reversed at furnace, thermostat, or CT™ compatible outdoor AC/HP

x Short between data 1

and data 2 wires

x Short between data 1

or data 2 wires and R (24VAC) or C (24VAC common)

x Depress Learn Button x Verify that bus BIAS

and TERM dipswitches are in the ON position.

x None x None

x Check fuses and

circuit breakers; replace/reset

x Replace blown fuse x Check for shorts in

low voltage wiring in furnace/system

x Reset network by

depressing learn button

x Check data 1/ data 2

voltages

x Check

communications wiring (data 1/ data 2 wires)

x Check wire

connections at terminal block

x Verify furnace

installation type (legacy/ traditional or communicating)

x Check data 1/ data 2

voltages

x None x None

x Check

communications wiring (data 1/ data 2 wires)

x Check wire

connections at terminal block

x Check data 1/ data 2

voltages

x Depress once

quickly for a powerup reset

x Depress and hold

for 2 seconds for an out-of-box reset

x Turn power OFF

prior to repair

x Turn power OFF

prior to repair

x Verify wires at

terminal blocks are securely twisted together prior to inserting into terminal block

x Verify data1 and

data voltages as described above

x Turn power OFF

prior to repair

x Verify wires at

terminal blocks are securely twisted together prior to inserting into terminal block

x Verify data1 and

data voltages as described above

ORMAL SEQUENCE OF OPERATION

POWER U P

The normal power up sequence is as follows:

• 115 VAC power applied to furnace.

• Integrated control module performs internal checks.

• Integrated control module displays

8 on dual 7-segment

display LED’s.

• Integrated control module monitors safety circuits

continuously.

• Furnace awaits call from thermostat. Dual 7-segment

LED’s display

P while awaiting call from thermostat.

HEATING M ODE

The normal operational sequence in heating mode is as follows:

• R and W1 (or R and W1/W2) thermostat contacts close,

initiating a call for heat.

• Integrated control module performs safety circuit checks.

• Induced draft blower is energized on high speed for a 15-

second prepurge. Humidifier terminal is energized with induced draft blower.

• Induced draft blower steps to low speed following

prepurge. Low stage pressure switch contacts are closed.

• Igniter warm up begins upon step to low speed and

presence of closed low stage pressure switch contacts.

PERATIONAL

HECKS

& S

AFETY

IRCUIT

ESCRIPTION

• Gas valve opens at end of igniter warm up period, delivering

gas to burners and establishing flame.

• Integrated control module monitors flame presence. Gas

valve will remain open only if flame is detected.

• If the thermostat call is for low heat, gas valve and induced

draft blower will continue on low stage. If the call is for high heat, the gas valve and induced draft blower will change to high stage.

• Circulator blower is energized on heat speed following a

thirty (30) second blower on delay. The circulator blower requires thirty seconds to ramp up to full speed. Electronic air cleaner terminal is energized with circulator blower.

• Furnace is now operating on the specified stage called

for by the two-stage thermostat.

• Furnace runs, integrated control module monitors safety

circuits continuously.

• If the two-stage thermostat changes the call from low

heat to high heat, the integrated control module will immediately switch the induced draft blower, gas valve, and circulator blower to their high stage settings.

• If the two-stage thermostat changes the call from high

heat to low heat, the control will immediately switch the induced draft blower and gas valve to their low stage settings. The circulator blower will remain on high heating speed for thirty (30) seconds before switching to

the low heat circulating speed.

• R and W1 (or R and W1/W2) thermostat contacts open,

completing the call for heat.

• Gas valve closes, extinguishing flame.

• Induced draft blower is de-energized following a fifteen

second post purge. Humidifier terminals are de-energized.

• Circulator blower continues running for the selected heat

off delay period (90, 120, 150 or 180 seconds). The speed run during this period depends on the last heat call provided by the thermostat.

If the last call for heat was a call for low heat, the air circulator motor will run on low heat speed for the duration of the heat off delay period (90, 120, 150 or 180 seconds).

If the last call for heat was a call for high heat, the air circulating motor will run on the high heating speed for thirty (30) seconds and then switch to the low heating speed for the balance of the heat off delay period (60, 90, 120 or 150 seconds).

• Circulator blower and electronic air cleaner terminal is

de-energized.

• Circulator blower ramps down to OFF during the 30

seconds following the heat off delay period.

• Furnace awaits next call from thermostat.

COOLING M ODE

The normal operational sequence in cooling mode is as follows:

• R and Y1/G or Y2/G thermostat contacts close, initiating

a call for cool.

• Integrated control module performs safety circuit checks.

• Outdoor fan and compressor are energized to their

appropriate speed.

• Circulator blower is energized on the appropriate cool

speed at the level and time determined by the selected ramping profile. Electronic air cleaner terminal is energized with circulator blower.

• Furnace circulator blower and outdoor cooling unit run

their appropriate speeds, integrated control module monitors safety circuits continuously.

• R and Y1/G or Y2/G thermostat contacts open,

completing the call for cool.

• Outdoor fan and compressor are de-energized.

• Circulator blower continues running during a cool off delay

period. The OFF delay time and airflow level are determined by the selected ramping profile.

• Electronic air cleaner terminal and circulator blower are de-energized.

• Furnace awaits next call from thermostat.

FAN O NLY M ODE

The normal operational sequence in fan only mode is as follows:

• R and G thermostat contacts close, initiating a call for

fan.

• Integrated control module performs safety circuit checks.

• Circulator blower is energized on continuous fan speed

(30% of the furnace’s maximum airflow capability) following a five (5) second delay. Electronic air cleaner terminal is energized.

• Circulator blower runs, integrated control module

monitors safety circuits continuously.

• R and G thermostat contacts open, completing the call

for fan.

• Circulator blower is de-energized. Electronic air cleaner

terminal is de-energized.

• Furnace awaits next call from thermostat.

PERATIONAL CHECKS

The burner flames should be inspected with the burner compartment door installed. Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). Flames should extend directly outward from the burners without curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.

ROUBLESHOOTING

& M

AINTENANCE

FLAME S ENSOR

The flame sensor is a probe mounted to the burner/manifold assembly which uses the principle of flame rectification to determine the presence or absence of flame.

ROUBLESHOOTING

ELECTROSTATIC D ISCHARGE (ESD) PRECAUTIONS

Burner Flame

AFETY CIRCUIT DESCRIPTION

A number of safety circuits are employed to ensure safe and proper furnace operation. These circuits serve to control any potential safety hazards and serve as inputs in the monitoring and diagnosis of abnormal function. These circuits are continuously monitored during furnace operation by the integrated control module.

INTEGRATED C ONTROL M ODULE

The integrated control module is an electronic device which, if a potential safety concern is detected, will take the necessary precautions and provide diagnostic information through an LED.

PRIMARY LIMIT

The primary limit control is located on the partition panel and monitors heat exchanger compartment temperatures. It is a normally-closed (electrically), automatic reset, temperature-activated sensor. The limit guards against overheating as a result of insufficient conditioned air passing over the heat exchanger.

AUXILIARY L IMIT

The auxiliary limit controls are located on or near the circulator blower and monitors blower compartment temperatures. They are a normally-closed (electrically), auto-reset sensors. These limits guard against overheating as a result of insufficient conditioned air passing over the heat exchanger.

ROLLOUT LIMIT

NOTE: Discharge body’s static electricity before touching unit.

An electrostatic discharge can adversely affect electrical components.

1. Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground.

2. Firmly touch a clean, unpainted, metal surface of the furnace away from the control. Any tools held in a person’s hand during grounding will be discharged.

DIAGNOSTIC C HART

The rollout limit controls are mounted on the burner/manifold assembly and monitor the burner flame. They are normallyclosed (electrically), manual-reset sensors. These limits guard against burner flames not being properly drawn into the heat exchanger.

PRESSURE S WITCHES

The pressure switches are normally-open (closed during operation) negative air pressure-activated switches. They monitor the airflow (combustion air and flue products) through the heat exchanger via pressure taps located on the induced draft blower and the coil front cover. These switches guard against insufficient airflow (combustion air and flue products) through the heat exchanger and/or blocked condensate drain conditions.

WARNING

HIGHVOLTAGE!

TO

AVOIDPERSONALINJURYORDEATHDUETO

ELECTRICALSHOCK,DISCONNECTELECTRICALPOWER

BEFORE

Refer to the Troubleshooting Chart at the end of this manual for assistance in determining the source of unit operational problems. The dual 7-segment LED display will display an error code that may contain a letter and number. The error code may be used to assist in troubleshooting the unit.

PERFORMINGANYSERVICEORMAINTENANCE



ISCELLANEOUS

FAULT R ECALL

The ignition control is equipped with a momentary push-button switch that can be used to display the last six faults on the dual 7-segment LED’s. The control must be in Standby Mode (no thermostat inputs) to use the feature. Depress the switch for approximately 2 seconds. Release the switch when the LED’s are turned off. The last six faults will be displayed most recent to least recent on the dual 7-segment LED’s.

NOTE: Consecutively repeated faults are stored a maximum of three times. Example: A clogged return air filter causes the furnace limit to trip repeatedly. The control will only store this fault the first three consecutive times the fault occurs.

RESETTING F ROM L OCKOUT

Furnace lockout results when a furnace is unable to achieve ignition after three attempts during a single call for heat. It is

characterized by a non-functioning furnace and a

0 code dis-

played on the dual 7-segment display. If the furnace is in “lockout”, it will (or can be) reset in any of the following ways.

1. Automatic reset. The integrated control module will automatically reset itself and attempt to resume normal operations following a one hour lockout period.

2. Manual power interruption. Interrupt 115 volt power to the furnace.

3. Manual thermostat cycle. Lower the thermostat so that there is no longer a call for heat for 1 -20 seconds then reset to previous setting.

NOTE: If the condition which originally caused the lockout still exists, the control will return to lockout. Refer to the Diagnostic Chart for aid in determining the cause.

AINTENANCE

WARNING

TO

AVOIDELECTRICALSHOCK,INJURYORDEATH

DISCONNECTELECTRICALPOWERBEFOREPERFORMINGANY

MAINTENANCE

HANDLEWITHCARE

WITHBAREFINGERS,ROUGHHANDLINGORVIBRATION

COULDDAMAGETHEIGNITERRESULTINGINPREMATURE

FAILURE

HANDLETHEIGNITER

.IF

YOUMUSTHANDLETHEIGNITER

.T

OUCHINGTHEIGNITERELEMENT

.O

NLYAQUALIFIEDSERVICERSHOULDEVER

,



,



ANNUAL I NSPECTION

The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at the beginning of the heating season. This will ensure that all furnace components are in proper working order and that the heating system functions appropriately. Pay particular attention to the following items. Repair or service as necessary.

• Flue pipe system. Check for blockage and/or leakage. Check the outside termination and the connections at and internal to the furnace.

• Heat exchanger. Check for corrosion and/or buildup within the heat exchanger passageways.

• Burners. Check for proper ignition, burner flame, and flame sense.

• Drainage system. Check for blockage and/or leakage. Check hose connections at and internal to furnace.

• Wiring. Check electrical connections for tightness and/ or corrosion. Check wires for damage.

• Filters.

FILTERS

CAUTION

TO

ENSUREPROPERUNITPERFORMANCE,ADHERETOTHEFILTERSIZES

GIVENINTHERECOMMENDEDMINIMUMFILTERSIZETABLEOR

PECIFICATIONSHEETAPPLICABLETOYOURMODEL

FILTER M AINTENANCE

Improper filter maintenance is the most common cause of inadequate heating or cooling performance. Filters should be cleaned (permanent) or replaced (disposable) every two months or as required. When replacing a filter, it must be replaced with a filter of the same type and size.

FILTER REMOVAL

Depending on the installation, differing filter arrangements can be applied. Filters can be installed in either the central return register or a side panel external filter rack (upflow only). A media air filter or electronic air cleaner can be used as an alternate filter. Follow the filter sizes given in the Recommended Minimum Filter size table to ensure proper unit performance.

To remove filters from an external filter rack in an upright upflow installation, follow the directions provided with external filter rack kit.

HORIZONTAL UNIT FILTER REMOVAL

Filters in horizontal installations are located in the central return register or the ductwork near the furnace.

To remove:

1. Turn OFF electrical power to furnace.

2. Remove filter(s) from the central return register or ductwork.

3. Replace filter(s) by reversing the procedure for removal.

4. Turn ON electrical power to furnace.

MEDIA AIR FILTER OR ELECTRONIC AIR CLEANER REMOVAL

Follow the manufacturer’s directions for service.



ISCELLANEOUS

BURNERS

Visually inspect the burner flames periodically during the heating season. Turn on the furnace at the thermostat and allow several minutes for flames to stabilize, since any dislodged dust will alter the flames normal appearance. Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). They should extend directly outward from the burners without curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.

INDUCED D RAFT AND C IRCULATOR B LOWERS

The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer. No further lubrication is required. Check motor windings for accumulation of dust which may cause overheating. Clean as necessary.

FLAME S ENSOR (QUALIFIED S ERVICER O NLY)

Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an insulator causing a drop in the flame sense signal. If the flame sense signal drops too low the furnace will not sense flame and will lock out. The flame sensor should be carefully cleaned by a qualified servicer using emery cloth or steel wool. Following cleaning, the flame sense signal should be as indicated in the Specifications Sheet.

FLUE P ASSAGES (QUALIFIED S ERVICER O NLY)

The heat exchanger flue passageways should be inspected at the beginning of each heating season. If necessary, clean the passageways as outlined below.

1. Turn OFF the electrical power and gas supply to the furnace.

2. Disconnect the gas line and remove the burner/ manifold assembly by removing the screws securing the assembly to the partition panel.

3. Disconnect the flue pipe system from the induced draft blower.

4. Remove the induced draft blower and collector box cover.

5. Clean the primary heat exchanger tubes using a wire brush attached to a length of high grade stainless steel cable, such as drain cleanout cable. Attach a variable speed reversible drill to the other end of the cable. Slowly rotate the cable with the drill and insert it into one of the heat exchanger tubes. While reversing the drill, work the cable in and out several times to obtain sufficient cleaning. Repeat for each tube.

6. Clean residue from furnace using a vacuum cleaner.

7. Replace the parts removed in the previous steps in reverse order.

8. Turn on electrical power and gas to furnace. Check for leaks and proper unit operation.

9. Severe heat exchanger fouling is an indication of an operational problem. Perform the checks listed in Startup Procedure and Adjustments to reduce the chances of repeated fouling.

EFORE LEAVING AN INSTALLATION

• Cycle the furnace with the thermostat at least three

times. Verify cooling and fan only operation.

• Review the Owner’s Manual with the homeowner and

discuss proper furnace operation and maintenance.

• Leave literature packet near furnace.

EPAIR AND REPLACEMENT PARTS

• When ordering any of the listed functional parts, be sure

to provide the furnace model, manufacturing, and serial numbers with the order.

• Although only functional parts are shown in the parts

list, all sheet metal parts, doors, etc. may be ordered by description.

• Parts are available from your distributor.

Functional Parts List-

Gas Valve Blower Motor Gas Manifold Blower Wheel Natural Gas Orifice Blower Mounting Bracket Propane Gas Orifice Blower Cutoff Igniter Blower Housing Flame Sensor Inductor Rollout Limit Switch Heat Exchanger

Primary Limit Switch Auxiliary Limit Switch

Pressure Switch Integrated Control Module Induced Draft Blower Transformer Door Switch

ROUBLESHOOTING

HART

Notes & Cautions

repair.

module fuse with 3A

automotive fuse.

“Electrostatic Discharge”

section of manual.

x Turn power OFF prior to

x Replace integrated control

x Read precautions in

module with current

x Replace integrated control

replacement parts.

x Turn power OFF prior to

repair.

with care.

x Igniter is fragile, handle

emery cloth.

section for piping details.

x Sand flame sensor with

x See “Vent/Flue Pipe”

x Turn power OFF prior to

repair.

with correct replacement

part.

x Replace pressure switch

x Turn power OFF prior to

repair.

with correct replacement

part.

x Replace pressure switch

x Replace induced draft

blower with correct

replacement part.

Corrective Actions

interruption.

switch operation (hose, wiring,

contact operation). Correct if

necessary.

sensor if coated and/or oxidized.

proper length, elbows, and

termination.

furnace and integrated control

x Assure 115 and 24 volt power to

module.

fuse (3A). Replace if necessary.

and 24 volt circuits. Repair as

necessary.

x Check integrated control module

x Check for possible shorts in 115

module.

x Replace bad integrated control

x Locate and correct gas

x Check front cover pressure

x Replace or realign igniter.

x Check flame sense signal. Sand

x Check flue piping for blockage,

x Verify proper induced draft

blower performance.

x Replace low stage pressure

switch.

x Repair short in wiring.

Repair/replace if necessary.

piping for blockage, proper

length, elbows, and termination.

necessary.

performance. Correct as

necessary.

or contact motion.

x Inspect pressure switch hose.

x Inspect flue and/or inlet air

x Check drain system. Correct as

x Check induced draft blower

connection.

x Correct pressure switch set point

x Tighten or correct wiring

Possible Causes

may be no gas to burners, front

cover pressure switch stuck open,

bad igniter or igniter alignment,

improper orifices, or

coated/oxidized or improperly

connected flame sensor.

Cause may be interrupted gas

supply, lazy burner flames

(improper gas pressure or

restriction in flue and/or

combustion air piping), front

cover pressure switch opening, or

improper induced draft blower

performance.

contacts sticking.

door switch open or 24 volt wire

improperly connected or loose

x Blown fuse or circuit breaker

x Integrated control module has an

internal fault

x Manual disconnect switch OFF,

x Normal operation x None x Normal operation

x Failure to establish flame. Cause

x Loss of flame after establishment.

wiring.

x Low stage pressure switch

x Shorts in pressure switch circuit

pinched, or connected improperly.

blocked drain system or weak

induced draft blower.

or malfunctioning switch

contacts.

x Pressure switch hose blocked

x Blocked flue and/or inlet air pipe,

x Incorrect pressure switch set point

wiring.

x Loose or improperly connected

ComfortNet™

Thermostat Only

Fault Description

LED Codes

Diagnostic/Status

& ComfortNet™ Thermostat)

Symptoms of Abnormal Operation (Legacy

FAULT

Message Code

INTERNAL

or no 24 volt power to

x No 115 power to furnace

None

x Furnace fails to operate

x Integrated control module LED display

integrated control

provides no signal.

module

x Blown fuse or circuit

x ComfortNet™ thermostat “Call for

PS1

CLOSED

switch circuit is closed at

x Low stage pressure

start of heating cycle.

error code.

PS1 OPEN E2

switch circuit is not

closed.

x Low stage pressure

error code.

breaker

None None

LOCKOUT E0

an excessive number of

module has an internal

fault

x Integrated control

x Normal operation

ignition “retries” (3 total)

x Furnace lockout due to

error code.

Service” icon illuminated.

Service” icon illuminated

x ComfortNet™ thermostat scrolls “Check

Furnace” message

x LED display indicates

provides E0

x Furnace fails to operate

x Integrated control module LED display

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Furnace fails to operate.

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

with no further furnace operation.

x Induced draft blower runs continuously

provides E1

x Integrated control module LED display

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

provides E2

x Integrated control module LED display

ROUBLESHOOTING

Notes & Cautions

repair.

applicable to your model

for allowable rise range

x Turn power OFF prior to

and proper circulator

x See Specification Sheet

Corrective Actions

blockage. Clean filters or

remove obstruction.

and performance. Correct speed

x Check filters and ductwork for

or replace blower motor if

x Check circulator blower speed

HART

speed.

section for piping details.

x See "Vent/Flue Pipe"

necessary.

alignment.

for blockage, proper length,

elbows, and termination. Correct

as necessary.

proper performance. Replace if

x Check burners for proper

x Check flue and air inlet piping

necessary.

x Check induced draft blower for

connection.

x Tighten or correct wiring

repair.

x Turn power OFF prior to

in flame sensor wiring.

x Correct short at flame sensor or

x Check for lingering flame.

x Verify proper operation of gas

valve.

x Turn power OFF prior to

repair.

automotive type

repair.

emery cloth.

section for piping details.

gas pressure.

repair.

correct replacement part.

x Replace fuse with 3-amp

x Turn power OFF prior to

x Sand flame sensor with

x See "Vent/Flue Pipe"

x See rating plate for proper

x Turn power OFF prior to

voltage wiring

coated/oxidized.

x Sand flame sensor if

x Inspect for proper sensor

alignment.

blockage, proper length, elbows,

and termination.

x Check inlet air piping for

integrated control module to

rating plate. Adjust as needed.

x Check and correct wiring from

x Compare current gas pressure to

x Replace igniter with

igniter.

x Replace shorted igniter.

correct replacement part.

x Replace control with

wiring.

x Check and correct unit ground

control. Replace if necessary.

x Check igniter output from

Possible Causes

ComfortNet™

Thermostat Only

Fault Description

LED Codes

Diagnostic/Status

HIGH

Message Code

x Insufficient conditioned air over

x Primary limit or

the heat exchanger. Blocked

filters, restrictive ductwork,

LIMIT

OPEN

auxiliary limit circuit is

open.

improper circulator blower speed,

x Rollout limit circuit is

or failed circulator blower motor.

x Flame rollout.

open.

x Misaligned burners, blocked flue

and/or air inlet pipe, or failed

induced draft blower.

wiring.

x Loose or improperly connected

circuit.

x Short to ground in flame sense

x Lingering burner flame.

x Slow closing gas valve.

FLAME

IMPROPER

call for heat.

x Flame sensed with no

x Short in low voltage wiring x Locate and correct short in low

Not

Displayed

Not

Displayed

x Open Fuse

x Flame sensor is coated/oxidized.

WEAK

x Flame sense micro amp

positioned in burner flame.

x Flame sensor incorrectly

FLAME

signal is low

improper gas pressure or

combustion air.

x Lazy burner flame due to

x Improperly connected igniter.

IGNITER

x Problem with igniter

x Shorted igniter.

FAULT

circuit.

control module.

x Poor unit ground.

x Igniter relay fault on integrated

Symptoms of Abnormal Operation

(Legacy & ComfortNet™ Thermostat)

error code.

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

runs continuously. No furnace operation.

x Induced draft blower and circulator blower

furnace operation.

provides E3

x Circulator blower runs continuously. No

x Integrated control module LED display

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x No furnace operation.

provides E4

x Integrated control module LED display

“Battery Power”.

provides E5

x ComfortNet™ thermostat displays

x Integrated control module LED display

x Normal furnace operation.

provides

x Integrated control module LED display

x Furnace fails to operate.

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

provides E7

x Integrated control module LED display

ROUBLESHOOTING

HART

Notes & Cautions

repair.

with correct replacement

x Turn power OFF prior to

part.

x Replace pressure switch

x Turn power OFF prior to

repair.

with correct replacement

part.

x Replace pressure switch

x Replace induced draft

blower with correct

replacement part.

x Turn power OFF prior to

repair.

x Turn power OFF prior to

repair

specific model.

BEFORE turning power

ON. Memory card may be

removed after data is

loaded.

removing memory card.

x Use memory card for the

x Insert memory card

x Turn power OFF before

x Error code will be cleared

once data is loaded.

Corrective Actions

switch.

x Replace high stage pressure

x Repair short in wiring

Repair/replace if necessary.

piping for blockage, proper

length, elbows, and termination.

Check drain system. Correct as

necessary.

performance. Correct as

necessary.

or contact motion.

connection.

correct polarity.

x Inspect pressure switch hose.

x Inspect flue and/or inlet air

x Check induced draft blower

x Correct pressure switch set point

x Tighten or correct wiring

necessary.

x Review wiring diagram to

x Verify proper ground. Correct if

x Check and correct wiring.

x Populate shared data set using

memory card.

Possible Causes

ComfortNet™

Thermostat Only

Fault Description

LED Codes

Diagnostic/Status

Message Code

contacts sticking.

x High stage pressure switch

PS2

CLOSED

switch circuit is closed at

x High stage pressure

wiring.

x Shorts in pressure switch circuit

start of heating cycle.

operating.

x Induced draft blower is

x Furnace is operating on

pinched, or connected

improperly.

blocked drain system or weak

induced draft blower.

point or malfunctioning switch

contacts.

x Pressure switch hose blocked

x Blocked flue and/or inlet air pipe,

x Incorrect pressure switch set

PS2 OPEN E9

low stage only

switch circuit is not

closed.

operating.

x High stage pressure

low stage only

x Induced draft blower is

x Furnace is operating on

wiring.

x Loose or improperly connected

x Polarity of 115 volt AC power to

REVERSED

x Polarity of 115 volt AC

furnace or integrated module is

PLTY

is reversed

revered.

x Poor unit ground

shared data.

x Furnace does not contain any

DATA

NO NET

x Data not yet on network.

Symptoms of Abnormal Operation

(Legacy & ComfortNet™ Thermostat)

furnace operates normally on low stage.

x Furnace fails to operate on high stage;

x Integrated control module LED display

error code.

provides

x Furnace fails to operate on high stage;

error code.

furnace operates normally on low stage.

provides

x Integrated control module LED display

error code.

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Furnace fails to operate.

provides d

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Integrated control module LED display

provides

x Furnace fails to operate.

x Integrated control module LED display

ROUBLESHOOTING

Notes & Cautions

repair

specific model.

x Turn power OFF prior to

x Use memory card for the

x Insert memory card

Corrective Actions

for the specific model. Re-

populate data using correct

memory card if required.

x Verify shared data set is correct

BEFORE turning power

ON. Memory card may be

HART

removed after data is

loaded.

removing memory card.

x Turn power OFF before

x Error code will be cleared

once data is loaded.

repair

x Turn power OFF prior to

connection.

x Tighten or correct wiring

correct replacement part.

with correct replacement

x Replace inductor with

x Replace circulator motor

through inductor. Replace if

open or short circuit.

x Verify continuous circuit

x Check circulator blower motor.

repair

with correct replacement

part.

x Turn power OFF prior to

Replace if necessary.

x Tighten or correct wiring

part.

x Replace circulator motor

x Replace integrated control

connection.

Replace if necessary.

x Check circulator blower motor.

x Check integrated control module.

module with correct

repair

replacement part.

x Turn power OFF prior to

horse power is the same

x Verify circulator blower motor

x Replace motor with correct

specified for the specific furnace

replacement part.

x Use memory card for the

model. Replace if necessary.

x Verify shared data set is correct

specific model

x Insert memory card

for the specific model. Re-

populate data using correct

BEFORE turning power

ON. Memory card may be

memory card if required.

removed after data is

loaded.

removing memory card.

x Turn power OFF before

x Error code will be cleared

once shared data and

motor horse power match.

x Turn power OFF prior to

x Check filters for blockage.

repair.

Clean filters or remove

obstruction.

Remove obstruction. Verify all

registers are fully open.

sized for system. Resize/replace

ductwork if necessary.

"Location Requirements &

Considerations" for furnace

x Check ductwork for blockage.

x Verify ductwork is appropriately

installation requirements.

x See "Product Description" and

Possible Causes

ComfortNet™

Thermostat Only

Fault Description

LED Codes

Diagnostic/Status

x Shared data set on memory card

Message Code

INVALID

x Invalid memory card

has been rejected by integrated

control module

MC DATA

data.

circulator motor power leads or

circulator motor power leads

x Loose wiring connection at

MOTOR

NOT RUN

is not running when it

should be running.

x Circulator blower motor

disconnected.

wiring connection at inductor (3/4

x Open circuit in inductor or loose

circulator motor control leads.

Hp and 1 Hp models only).

x Loose wiring connection at

x Failed circulator blower motor.

COMM

MOTOR

module has lost

communications with

x Integrated control

x Failed integrated control module.

circulator blower motor.

x Failed circulator blower motor.

in furnace.

x Incorrect circulator blower motor

x Incorrect shared data set in

MOTOR

MISMATCH

horse power in shared

data set does not match

x Circulator blower motor

integrated control module.

circulator blower motor

x Blocked filters.

x Restrictive ductwork.

x Undersized ductwork.

x High ambient temperatures.

LIMITS

MOTOR

horse power.

x Circulator blower motor

is operating in a power,

temperature, or speed

limiting condition.

Symptoms of Abnormal Operation

(Legacy & ComfortNet™ Thermostat)

error code.

operation.

provides d

Service” icon illuminated.

x Operation different than expected or no

x Integrated control module LED display

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Furnace fails to operate.

error code.

provides b

Service” icon illuminated.

Furnace” message.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

x Integrated control module LED display

x Furnace fails to operate.

error code.

provides b

Service” icon illuminated.

Furnace” message.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

x Integrated control module LED display

x Furnace fails to operate.

error code.

provides b

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Integrated control module LED display

x Furnace operates at reduced performance.

error code.

provides b

x Airflow delivered is less than expected.

x Integrated control module LED display

ROUBLESHOOTING

HART

Notes & Cautions

x Turn power OFF prior to

repair.

x Turn power OFF prior to

repair

x Replace motor with correct

replacement part.

x Replace wheel with correct

x Turn power OFF prior to

repair.

x Turn power OFF prior to

repair.

replacement part(s).

x Replace with correct

x Use memory card for the

repair.

specific model.

x Turn power OFF prior to

Corrective Actions

grills/registers, duct system, and

furnace air inlet/outlet for

blockages.

x Check filters, filter

obstructions. Remove and

repair/replace wheel/motor if

necessary.

shaft rotation and motor.

Replace motor if necessary.

line voltage to furnace is within

the range specified on the

furnace rating plate.

x Check circulator blower for

x Check circulator blower motor

x Check power to furnace. Verify

x See "Product Description" and

"Location Requirements &

Considerations" for furnace

installation requirements.

Verify control is populated with

correct shared data set. See data

errors above for details.

x Check integrated control module.

x Check for locked rotor condition

(see error code above for

details).

x Check filters for blockage.

Clean filters or remove

obstruction.

Remove obstruction. Verify all

registers are fully open.

sized for system. Resize/replace

x Check ductwork for blockage.

ductwork if necessary.

x Verify ductwork is appropriately

Possible Causes

ComfortNet™

Thermostat Only

Fault Description

LED Codes

Diagnostic/Status

x Abnormal motor loading, sudden

MOTOR

Message Code

x Circulator blower motor

change in speed or torque, sudden

TRIPS

senses a loss of rotor

blockage of furnace air inlet or

outlet.

filters, very restrictive ductwork,

blockage of furnace air inlet or

outlet.

housing.

x High loading conditions, blocked

control.

senses high current.

x Circulator blower motor

bearings.

x Obstruction in circulator blower

x Seized circulator blower motor

ROTOR

MTR LCKD

fails to start 10

consecutive times.

x Circulator blower motor

x High AC line voltage to furnace.

x Failed circulator blower motor.

x Low AC line voltage to furnace.

x High ambient temperatures.

VOLTS

MOTOR

shuts down for over or

under voltage condition.

x Circulator blower motor

shuts down due to over

temperature condition on

power module.

module.

x Error with integrated control

x Motor has a locked rotor

MOTOR

PARAMS

does not have enough

information to operate

x Circulator blower motor

condition.

properly.

x Blocked filters.

x Restrictive ductwork.

x Undersized ductwork.

LOW ID

AIRFLOW

consecutive times.

x Airflow is lower than

demanded.

x Motor fails to start 40

Symptoms of Abnormal Operation

error code.

provides b

Service” icon illuminated.

(Legacy & ComfortNet™ Thermostat)

x Furnace fails to operate.

x Integrated control module LED display

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Furnace fails to operate.

provides b

Service” icon illuminated.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

x Integrated control module LED display

Furnace” message.

x Furnace fails to operate.

provides b

Service” icon illuminated.

Furnace” message.

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

x Integrated control module LED display

x Furnace fails to operate.

provides b

Service” icon illuminated.

x Integrated control module LED display

x ComfortNet™ thermostat “Call for

x ComfortNet™ thermostat scrolls “Check

Furnace” message.

x Furnace operates at reduced performance

or operates on low stage when high stage is

expected.

provides b

x Integrated control module LED display

TATUS

ODES

INTERNAL CONTROL FAULT/NO POWER

NORMAL OPERATION

O P

LOCKOUT DUE TO EXCESSIVE RETRIES

E 0

LOW STAGE PRESSURE SWITCH STUCK C LOSED AT START OF HEATING CYCLE

E 1

LOW STAGE PRESSURE SWITCH STUCK OPEN

E 2

OPEN HIGH LIMIT SWITCH

E 3

FLAME DETECTED WHEN NO FLAME SHOULD BE PRESENT

E 4

OPEN FUSE

E 5

LOW FLAME SIGNAL

E 6

IGNITER FAULT OR IMPROPER GROUNDING

E 7

HIGH STAGE PRESSURE SWITCH STUCK CLOSED AT START OF HEATING CYCLE

E 8

HIGH STAGE PRESSURE SWITCH STUCK OPEN

E 9

REVERSED 115 VAC POLARITY

E A

DATA NOT YET ON N ETWORK

d 0

INVALID MEMORY CARD DATA

d 4

BLOWER MOTOR NOT RUNNING

b 0

BLOWER COMMUNICATION ERROR

b 1

BLOWER HP MIS-MATCH

b 2

BLOWER MOTOR OPERATING IN POWER, TEMPERATURE, OR SPEED LIMIT

b 3

BLOWER MOTOR CURRENT TRIP OR LOST ROTOR

b 4

BLOWER MOTOR LOCKED ROTOR

b 5

OVER/UNDER VOLTAGE TRIP OR OVER TEMPERATURE TRIP

b 6

INCOMPLETE PARAMETERS SENT TO MOTOR

b 7

LOW INDOOR AIRFLOW

b 9

LOW STAGE COOL

C 1

HIGH STAGE COOL

C 2

LOW STAGE HEAT

L 0

HIGH STAGE HEAT

H I

CONTINUOUS FAN

CFM/100; ALTERNATES WITH , , , ,

1 2

C 1

C 2

L O

H I

AIR F

LOW

ATA

Speed Selection Dip Switches

Cool Adjust Profile Heat Selection Selection Selection Selection Switches Switches Switches Switches

TAP 1 2 3 4 5 6 7 8

A OFF OFF OFF OFF OFF OFF OFF OFF

B ON OFF ON OFF ON OFF ON OFF

C OFF ON OFF ON OFF ON OFF ON

D ON ON ON ON ON ON ON ON

Profiles Pre-Run Short-Run OFF Delay

A ------- -------- 60 sec/100%

B ------- 30 sec/50% 60 sec/100%

C ------- 7.5 min/82% 60 sec/100%

D 30 sec/50% 7.5 min/82% 30 sec/50%

To set airflow:

(1) Select model and desired high stage cooling airflow. Determine the corresponding tap ( A, B, C, or D ). Set dip switches 1 and 2 to the appropriate ON / OFF p ositions. ( 2) Select model and de sired high stage heating airflow. Determine the corresponding tap ( A, B, C, or D ). Set dip switches 7 and 8 to the appropriate ON / OFF positions. (3) Select the airflow adjustment factor taps A and D are 1; Tap B is +10%; Tap C -10%. Set dip switches 3 and 4 to the appropriate ON / OFF positions.

To set Comfort Mode:

Select desired Comfort Mode profile (see profiles above). Set switches 5 and 6 to the appropriate ON / O FF positions.

Model Tap Low Stage High Stage Low Stage High Stage Cool Cool Heat Heat

390 520 650 780

520

715 910

1170 553

748

943

1203

390 520

715 910

520

715 910

1170 520

715 910

1175

600

800 1000 1200

800

1100 1400 1800

850

1150

1450 1850

600 800

1100

1400

800

1100

1400 1800

800

1100

1400 1800

735 805 875 935

945

1015

1085

1155

1085

1155 1225 1260

875

945

1015

1085

1050

1120

1190 1260

1210 1225 1245 1260

1750

1800

*DVC80703BX*

*DVC80905CX*

*DVC81155CX*

*MVC80704BX*

*MVC80905CX*

*MVC81155CX*

B C D

A B C D

A B

C D

1050

1150 1250 1350

1350 1450 1550 1650

1550 1650 1750 1800

1250 1350 1450 1550

1500 1600 1700 1800

1725

1775

DIP S

Sw itch

Ban k

WITCHES

Purpose

Heat O FF

Delay

Thermostat

Setup

Bus BIA S BIAS ON* ON* --- --- --- --- --- --- --- ---

---

TERM Bus Termination --- --- ON* --- --- --- --- --- --- ---

Cooling

Speed Tap

Adjust

Taps

Ramping

Prof iles

Heating

Speed Tap

DEHUMS5

Not applicable

Function

90 seconds OFF OFF --- --- --- --- --- --- --- ---

120 seconds ON OFF --- --- --- --- --- --- --- ---

150 seconds* OFF ON --- --- --- --- --- --- --- ---

180 seconds ON ON --- --- --- --- --- --- --- ---

1-Stage T-stat --- --- OFF --- --- --- --- --- --- ---

2-Stage T-Stat --- --- ON --- --- --- --- --- --- ---

5-Min Delay --- --- --- OFF --- --- --- --- --- ---

Auto Delay --- --- --- ON --- --- --- --- --- ---

A OFF OFF --- --- --- --- --- --- --- ---

B ON OFF --- --- --- --- --- --- --- ---

C OFF ON --- --- --- --- --- --- --- ---

D* ON ON --- --- --- --- --- --- --- ---

Normal* --- --- OFF OFF --- --- --- --- --- ---

10% --- --- ON OFF --- --- --- --- --- ---

-10% --- --- OFF ON --- --- --- --- --- ---

Normal --- --- ON ON --- --- --- --- --- ---

A* --- --- --- --- OFF OFF --- --- --- ---

B --- --- --- --- ON OFF --- --- --- ---

C --- --- --- --- OFF ON --- --- --- ---

D --- --- --- --- ON ON --- --- --- ---

A --- --- --- --- --- --- OFF OFF --- ---

B* --- --- --- --- --- --- ON OFF --- ---

C --- --- --- --- --- --- OFF ON --- ---

D --- --- --- --- --- --- ON ON --- ---

Disabled* --- --- --- --- --- --- --- --- OFF Unused

Enabled --- --- --- --- --- --- --- --- ON Unused

12345678910

(*Indicates factory setting)

DIP Sw itc h No.

*MVC8_AA W

MAY

UNIT

THIS

DEATH

INSTALLING

AILURE

. F

INJURY

PRESENT

SERVICING

MAY

PERSONAL

BEFORE

DAMAGE

SOURCES

POWER

ALL

POWER

PROPERTY

ULTIPLE

ISCONNECT

HI GH V OLTAGE !

CAUSE

HAR

NOTES:

1. SET HEAT ANTICIPATOR ON RO

2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED WHEN SERVICING.

3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 105°C. USE COPPER CONDUCTORS O NLY.

4. UNIT MUST BE PERMANENTLY GROUNDED AND CONFOR N.E.C. AND LOCAL CODES.

5. TO RECALL THE LAST 6 FAULTS, MOST RECENT TO LEAST RECENT, DEPRESS SWITCH FOR MORE THAN 2 SECONDS W HILE IN STANDBY (NO THERMOSTAT INPUTS)

NER COM

WERCOM

CIRCULATOR BLOWER

IRING

24V

DEHUM

DIAGNOSTIC

LED'S

ERMOSTATCO

DIP S WI TCHES

OM THERMO

TME

2ND ST G DLY T-STAT

HEAT OFF

DELAY

UNUSED

DEHUM

HEAT

DELAY

DJUST

COOL

NEUTRAL

5 4 3 2 1

IAGRAM

AUTO RESET AUXILIARY LIMIT CONTROL

CTION

SEE NOTE 5

LINE

HUM

STAT AT 0. 7 AMP S.

24V HUM.

GND

CTI

ON DEV

JUNCTION BOX

TO 115VAC/ 1

Ø /60 HZ POWER SUPPLY WITH

OVERCURRENT PROTE

EVI

ICE

DISCONNECT

CHASSIS GROUND

BLOWER COMPARTMENT DOOR SWITCH (OPEN WHEN DOOR OPEN)

LOW VOLTAGE (24V)

LOW VOLTAGE FIELD

HI VOLTAGE (115

INTEGRAT

INTEGRAT ED CONTROL MODULE

24V THERMOSTAT CONNECT IONS

24V HUM.

MIC

INTE GRATED CONTR OL M ODULE

IELD

JUNCTION

INTERNALTO

NTROL

ED CO

PLUG CONNEC TION

DOOR

SWITCH

INDUCTO 70kBTU,90 kBTU,

115 kBTU M ODEL S

ONLY

LIN

EAC

HUM

IGN

LINE

FUSE 3 A

TO+

TO MICRO

R COI

IND HI

IND LO

TH (4)

HLO (10)

PSO (7)

PS1 (2)

HIGH FIRE PRES S. SWT ICH

HLI (1)

MVL (13)

MVH (1 4)

MVC (8 )

GND (5)

TR (11)

(

JUNCT ION BOX

INDOOR

CIRCULATOR

BLWR

ELECTRONIC

IR CLEANER

BLWR

HUMI DI FIER

HOT SURFACE

IGNITER

FLAME SENSOR

115 VAC

24 VAC

24V HUM.

)

(

)

(

)

HUMID

EQUIPM ENT GND

FIELD SPLICE

SWITCH (TEMP.)

SWITCH (PRESS

PROT. D EVICE

C BLWR

AIR

FIELD G

GND

NEUTRAL

40 VA TRANSFORMER

LOW FIRE P RESS. SWITCH

GND

URR

GAS VALVE

INTEGRATED CONTROL MODULE

FUSE

EAC

GND

INDUCTOR COIL 70kBTU,90 kBTU,

115 kBTU M ODEL S

ONLY

COLOR CODES:

PK PINK B

ROWN

WH WHITE BL BLUE GY GRAY

M T

RD RED

OROR PU PURPLE GN GREEN BK BLACK

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

*MVC8_AB, *DVC8_AA W

ID BLOWER TWO-STAGE PRESSURE

SWITCH ASSEMB LY

HOT

SURFACE

IGNITER

2 CIRCUIT

CONNECTOR

TWO STAGE

GAS VALVE

(HONEY WELL)

MAY

UNIT

THIS

DEATH

INSTALLING

AILURE

. F

INJURY

PRESENT

SERVICING

MAY

PERSONAL

BEFORE

DAMAGE

SOURCES

POWER

ALL

POWER

PROPERTY

ULTIPLE

ISCONNECT

HI GH V OLTAGE !

CAUSE

ECM M TR HARNESS

NOTES:

1. SET HEAT ANTICIPATOR ON ROOM TH ERMOSTAT AT 0 .7 AMPS.

2. MANUFACTUR ER'S SPECIFIED REPL ACEMENT PARTS MUST BE USED WHE N SERVICING.

3. IF ANY OF THE ORIGI NAL W IRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRI NG MATERIAL HAVING A TEMPE RATURE RATING OF AT LEAST 105 C. U SE COPPER CONDUCTORS ONLY.

4. UNIT MUST BE PERM ANENTLY GROUNDED AND CONFORM TO N.E.C. AND LOCAL CODES .

5. TO RECALL THE LAST 6 FAU LTS, MOST RECENT TO LEAST RECENT, DEPRESS SWITCH F OR MORE THAN 2 SECONDS WHILE IN STANDBY (NO THERMOSTAT INPUTS)

LOW FIRE

PRESSURE

SWITCH

MANUAL RESET ROLLOUT LIMIT

AUTO RESET PRI MARY

CONTROLS

LIMIT CONTROL

WH RD

BURNER COMPARTMENT

BLOWER COMPARTMENT

24 V THER MOSTAT CONNECTIONS

DEHUM

DIAGNOSTIC

LED'S

CONTROL

MODULE

CIRCULATOR BLOW ER

INTEGRATED

2ND STG DLY

W O

T-STAT

HEAT OFF

DELAY

DIP SWITCHES

UNUSED

DEHUM

4 CIRCUIT MOTOR

HEAT

CONNECTOR

DELAY

ADJUST

COOL

5 CIRC UIT CO NNECTO R

5 4 3 2 1

NEUTRAL

SEE NOTE 5

GND

AUTO RESET AUXILIARY LIMIT CONTROL

LINE

HUM

GND

24V HU M.

INDUCED

DRAFT

BLOWER

FUSE

E C

IRING

24 V 3 A

BR BL

INDUCTOR C OIL 70kBTU,90kBTU,

115kBTU MODELS

ONLY

COLOR CODE S:

PK PIN K BR B ROWN WH WHITE BL BLUE GY GRAY RD RED YL YELLOW OR ORA NGE PU PURPLE GN GREEN BK BL ACK

HIGH FIRE

PRESSURE

SWITCH

IAGRAM

JUNCTION BOX

FLAME SENSOR

24 VAC

11 5 VAC

40 VA TRANSFORMER

BLOWER COMPARTMENT DOOR SWITC H (OPEN WH EN DOOR OPEN)

LOW VOLTAGE (24V)

LOW VOLTAGE FIELD

HI VOLTAGE (115V)

HI VOLTAGE FIELD

INTEGRATED CONTROL

DISCONNECT

TO 115VAC/ 1

OVERCURRENT PRO TECTION DEVICE

WARNING:

DISCONNECT POWER BEFOR E SERVICI NG. WIR ING TO U NIT MUST BE PROPERLY POLAR IZED AND GROUNDED.

CHASSIS GROUND

DOOR

SWITCH

INDUCTOR COI L 70kBTU,90kBTU,

115kBTU MODELS

LINE

N T E G R A T E D

C O N T R O L M O D U L E

LINE

FUSE 3 A

2 4 V

T H E R

M O S T

T C O

MICRO

N E C T

O N S

DEHUM

2 4 V

H U M

MICRO

INTEGRATED CONTROL MODULE

JUNCTION

TERMINAL

INTERNA L TO

PLUG CONNECTION

GND

Ø /60 HZ POWER SUPPLY WITH

GND

JUNCTION BOX

ONLY

EAC

HUM

IGN

TO +VDC

INDOOR

AIR

CIRCULATOR

BLWR

ELECTRO NIC AIR CLEAN ER

IND HI

BLWR

IND LO

HUMIDIFI ER

HOT SURFACE

IGNITER

FLAME SENSO R

115 VAC

TH (4)

HLO (10)

PSO (7)

PS1 (2)

PS2 (12)

HIGH FIRE PRESS. SWTICH

HLI (1 )

MVL (13)

MVH (14)

MVC ( 8)

GND ( 5)

TR (11)

GND ( 4)

+ VDC (1)

RX (2)

TX (3)

24 VAC

AUT O RESET AUXILI ARY LI MIT

CONTROLS

24V HUM.

INDOOR

CIRCULATOR

HUMIDIFI ER

EQUIPMENT GND

FIELD SPLICE

SWIT CH (TEM P.)

SWITCH (PRESS.)

OVERCURRENT PROT. DEVICE

TO 115 VAC/ 1

Ø /60 HZ POWER SUPPLY WITH OVERCURRENT PROTECTION DEVICE

WARNING:DISCONNECT POWER BEFORE SERV ICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED.

DISCONNE CT

GND

NEUTRAL

40 VA TRANSFORME R

AUTO RESET PRIMARY

LIMIT CONTROL

LOW FIRE PRESS.

SWITCH

MANUAL RESET RO LLOUT LIMIT CONTROLS

GAS VALV E

GND

AIR

BLWR

FIELD GND

IGNITER

N T E G R A T E D

C O N T R O L M O D U L E

0140F00660 REV. A

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

Goodman Manufacturing Company, L.P.

5151 San Felipe, Suite 500, Houston, TX 77056

www.goodmanmfg.com

Goodman Mfg VC8 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual