58MVP4-Way Multipoise Direct-VentVariable-Capacity Condensing Gas FurnaceInstallation, Start-Up, and Operating InstructionsFor Sizes 040—120, Series 170This symbol → indicates a change since the last issue.Index PageDIMENSIONAL DRAWING........................................................3SAFETY CONSIDERATIONS .....................................................2Clearances to Combustibles......................................................4CODES AND STANDARDS........................................................5ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........5INTRODUCTION ..........................................................................5APPLICATIONS ......................................................................5-13General ......................................................................................5Upflow Applications..............................................................5-8Downflow Applications.........................................................8-9Horizontal Left (Supply-Air Discharge) Applications .......9-11Horizontal Right (Supply-Air Discharge) Applications...11-13LOCATION ............................................................................13-14General ....................................................................................13Low-Heat Only Installation...............................................13-14Furnace Location Relative to Cooling Equipment ................14Hazardous Locations...............................................................14INSTALLATION....................................................................14-15Leveling Legs (If Desired)................................................14-15Installation In Upflow or Downflow Applications................15Installation In Horizontal Applications ..................................15AIR DUCTS............................................................................15-19General Requirements.............................................................15Ductwork Acoustical Treatment.............................................15Supply-Air Connections..........................................................15Return-Air Connections ..........................................................17Filter Arrangement..................................................................18Bottom Closure Panel.............................................................18Gas Piping..........................................................................18-19ELECTRICAL CONNECTIONS...........................................20-23115-v Wiring......................................................................20-2124-v Wiring.............................................................................21Accessories..............................................................................23DIRECT VENTING ...............................................................23-32Removal of Existing Furnaces fromCommon Vent Systems.....................................................24Combustion-Air and Vent Piping .....................................24-29Concentric Vent and Combustion-Air TerminationKit Installation..............................................................29-32Multiventing and Vent Terminations .....................................32CONDENSATE DRAIN..............................................................32General ....................................................................................32Application ..............................................................................32Condensate Drain Protection ..................................................32SEQUENCE OF OPERATION..............................................32-37Single-Stage Thermostat and Two-Stage Heating(Adaptive Mode) ..........................................................34-35Two-Stage Thermostat and Two-Stage Heating....................35Cooling Mode ....................................................................35-36Thermidistat Mode..................................................................36Super-Dehumidify Mode ........................................................36Continuous Blower Mode .................................................36-37Heat Pump...............................................................................37Component Test ......................................................................37START-UP PROCEDURES ..................................................37-46General ....................................................................................37Select Setup Switch Positions...........................................37-40Prime Condensate Trap With Water ......................................41Purge Gas Lines......................................................................41Adjustments .......................................................................41-45Set Gas Input Rate ............................................................41-42Set Temperature Rise..............................................................43Set Thermostat Heat Anticipator............................................43A93040NOTE: Read the entire instructionmanual before starting the installation.ama CERTIFIEDAs an ENERGY STAR®Partner, Carrier Corpora-tion has determined thatthis product meets the EN-ERGY STAR® guidelinesfor energy efficiency.REGISTERED QUALITY SYSTEMFig. 1—Multipoise Orientations A93041UPFLOWDOWNFLOWHORIZONTALLEFTAIRFLOW AIRFLOWAIRFLOWAIRFLOWHORIZONTALRIGHTVisit www.carrier.comManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 6a 8a PC 101 Catalog No. 535-80054 Printed in U.S.A. Form 58MVP-12SI Pg 1 12-02 Replaces: 58MVP-11SI