INSTALLATION, OPERATION, AND MAINTENANCE GUIDE

1 installation , OPERATION, AND MAINTENANCE GUIDEALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODESM odel:CUX1B040A9241 ACUX1B060A9361 ACUX1B080A9421 ACUX1C100A9481 ACUX1D100A9601 ACUX1D120A9601 ACDX1B040A9241 ACDX1B060A9361 ACDX1B080A9421 ACDX1C100A9481 ACDX1D120A9601 AIMPORTANT This Document is customer property and is to remain with this return to service information pack upon completion of work. 2008 American Standard Heating & Air Conditioning All Rights ReservedUpflow / Horizontal* andDownflow / Horizontal*,Single Stage Direct Vent Gas-Fired Condensing Furnaces* Models can ONLY be rotatedto LEFT Side for horizontal installationUpflow / Horizontal*Downflow / Horizontal*Since the manufacturer has a policy of continuous product and product dataimprovement, it reserves the right to change design and specifications without 5016- 07A341624P07 installation InstructionsPub. No. 41-5016-07 Page 2 SAFETY SECTIONThe following safety practices and precautions must be followedduring the installation , servicing, and operation of this Use only with the type of gas approved for this furnace.

2 Referto the furnace rating Install this furnace only in a location and position as speci-fied in Location and Clearances (page 3), of these Provide adequate combustion and ventilation air to the fur-nace space as specified in Air for Combustion and Ventila-tion (pages 7-8), of these Combustion products must be discharged outdoors. Connectthis furnace to an approved vent system only, as specified inthe Venting section (pages 11-21), of these Never test for gas leaks with an open flame. Use a commer-cially available soap solution made specifically for the detec-tion of leaks to check all connections, as specified in GasPiping (page 27), of these Always install the furnace to operate within the furnace sintended temperature-rise range with a duct system whichhas an external static pressure within the allowable range, asspecified on the unit rating plate. Airflow with temperaturerise for cfm versus static is shown in the Service Factsaccompanying this When a furnace is installed so that supply ducts carry aircirculated by the furnace to areas outside the space contain-ing the furnace, the return air shall also be handled by aduct(s) sealed to the furnace casing and terminating outsidethe space containing the A gas-fired furnace for installation in a residential garagemust be installed as specified in Location and Clearances section (page 3), of these The furnace may be used for temporary heating of buildingsor structures under construction only when the followingconditions have been met:a.

3 The furnace venting system must be complete and in-stalled per manufacturer s The furnace is controlled only by a room thermostat (nofield jumpers).c. The furnace return air duct must be complete and sealedto the furnace and clean air filters are in The furnace input rate and temperature rise must beverified to be within nameplate 100% of the furnace combustion air requirement mustcome from outside the The furnace return air temperature range is between55 and 80 degrees Clean the furnace, duct work, and components uponsubstantial completion of the construction process, andverify furnace operating conditions including ignition,input rate, temperature rise and venting, according to themanufacturer s product must be gas piped by a Licensed Plumber or GasFitter in the Commonwealth of Massachusetts. WARNING!FIRE OR EXPLOSION HAZARDF ailure to follow the safety warnings exactly could result inserious injury, death or property servicing could result in dangerous OPERATION, serious injury, death, or property MONOXIDE POISONING HAZARDF ailure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:1.

4 Seal any unused openings in the venting Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI 54 or the CAN/CGA B149 installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe As 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 deficiencies which could cause an unsafe Close fireplace 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 are operating at maximum speed. Do not operate a summer exhaust Follow the lighting instructions. Place the appliance being inspected into operation. Adjust the thermostat so appliance is operating If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI 54 and/or CAN/CGA B149 installation After it has been determined that each appliance connected to the venting system properly vents where tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-fired burning appliance to their previous conditions of use.

5 WARNING!Safety signal words are used to designate a degree or level ofseriousness associated with a particular hazard. The signal wordsfor safety markings are WARNING and indicates a potentially hazardous situation which,if not avoided, could result in death or serious indicates a potentially hazardous situation which,if not avoided, may result in minor or moderate injury. It is alsoused to alert against unsafe practices and hazards involvingonly property InstructionsPage 3 Pub. No. 41-5016-07 CONTENTSINSTALLATION installation Instructions .. 3 Location and 3 Outline 6 Air for Combustion and Ventilation .. 7-8 Duct Connections .. 8 Return Air 9 General Venting 11 Condensate Piping ..22-24 Field Wiring and Input Check .. 27 High Altitude 29 START-UP AND 29 Lighting Instructions .. 30 Sequence of 30 Control and Safety Switch Adjustments .. 30 Airflow Adjustment .. 30 Abnormal Conditions .. 31 OWNER S Specifications.

6 Servicing Requirements .. 44 IFC Fault 45 Unit Wiring Diagram ..46-49 CAUTION!To prevent shortening its service life, the furnace should notbe used as a Construction Heater during the finishingphases of construction until the requirements listed in item 9,a-g of the safety section of this publication have been in the presence of chlorides and fluorides frompaint, varnish, stains, adhesives, cleaning compounds, andcement create a corrosive condition which may cause rapiddeterioration of the heat exchanger. CAUTION!Do NOT install the furnace in a corrosive or manufacturer assumes no responsibility for equipment in-stalled in violation of any code or is recommended that Manual J of the Air Conditioning Contrac-tors Association (ACCA) or 230 be followed in estimatingheating requirements. When estimating heating requirements forinstallation at altitudes above 2000 ft., remember the gas inputmay need to be reduced (See High Altitude installation ).

7 Material in this shipment has been inspected at the factoryand released to the transportation agency without knowndamage. Inspect exterior of carton for evidence of roughhandling in shipment. Unpack carefully after moving equip-ment to approximate location. If damage to contents isfound, report the damage immediately to the and local utility requirements governing the installation ofgas fired equipment, wiring, plumbing, and flue connections mustbe adhered to. In the absence of local codes, the installation mustconform with latest edition of the National Fuel Gas Code National installation Code, CAN/CGA Thelatest code may be obtained from the American Gas AssociationLaboratories, 400 N. Capitol St. NW, Washington or furnaces have been classified as CATEGORY IV furnacesin accordance with latest edition of ANSI CAN/CGA Category IV furnaces operate with positive vent staticpressure and with a flue loss less than 17 percent.

8 These conditionsrequire special venting systems, which must be gas tight and AND CLEARANCESThe location of the furnace is normally selected by the architect, thebuilder, or the installer. However, before the furnace is moved intoplace, be sure to consider the following requirements:1. Is the location selected as near the chimney or vent and ascentralized for heat distribution as practical?2. Do all clearances between the furnace and enclosure equal orexceed the minimums stated in Clearance Table on the OutlineDrawings?3. Is there sufficient space for servicing the furnace and otherequipment? A minimum of 24 inches front accessibility to thefurnace must be provided. Any access door or panel must permitremoval of the largest Are there at least 3 inches of clearance between the furnacecombustion air openings in the front panel and any closed panelor door provided?5. Are the ventilation and combustion air openings large enoughand will they remain unobstructed?

9 If outside air is used, are theopenings set above the highest snow accumulation level? (See theAir for Combustion and Ventilation section.)6. Allow sufficient height in supply plenum above the furnace toprovide for cooling coil installation , if the cooling coil is notinstalled at the time of this furnace A furnace shall be installed so electrical components areprotected from If the furnace is installed in a residential garage, it mustbe installed so that the burners, and the ignition source arelocated not less than 18 inches above the floor and the furnacemust be located or protected to avoid physical damage :The furnace must be installed level. The only allowable variationwould be slightly to the left and/or forward in upflow installations orslightly toward the front in horizontal installations. This is necessaryfor proper condensate INSTRUCTIONS CAUTION!Disconnect all electric power including remote disconnectsbefore servicing, insure that all motor capacitors have dis-charged stored InstructionsPub.

10 No. 41-5016-07 Page 4 OUTLINE DRAWING FOR CUX1 FURNACES(ALL DIMENSIONS ARE IN INCHES) installation InstructionsPage 5 Pub. No. 41-5016-07 OUTLINE DRAWING FOR CDX1 FURNACES(ALL DIMENSIONS ARE IN INCHES) installation InstructionsPub. No. 41-5016-07 Page 6 The downflow furnace may be installed in an attic or crawl spacein the horizontal position by placing the furnace on the left side (asviewed from the front in the vertical position). The horizontalfurnace installation in an attic should be on a service platformlarge enough to allow for proper clearances on all sides and serviceaccess to the front of the furnace (See Outline Drawings). Linecontact is only permissible between lines formed by intersectionsof the top and two sides of the furnace casing and building joists,studs, or furnace may be placed horizontally in a crawl space on a pador other noncombustible material which will raise the unit forsufficient protection from moisture.