Carrier 58MXA 16SI Gas Furnace Owners Manual

58MXA Deluxe 4­Way Multipoise Fixed-Capacity Direct Vent Condensing Gas Furnace Visit www.carrier.com Installation, Start-Up, and Operating Instructions Sizes 040-140, Series 170 Condensate Trap Freeze Protection 10 Construct a Working Platform 11 Horizontal Right (Supply-Air Discharge) Applications 11 Condensate Trap Location 11 Condensate Trap Tubing .11 Condensate Trap Field Drain Attachment 12 Pressure Switch Tubing .12 Condensate Trap Freeze Protection 12 Construct a Working Platform 13 LOCATION 13 General 13 Furnace Location Relative to Cooling Equipment .14 Hazardous Locations .14 INSTALLATION .14 Leveling Legs (If Desired) .14 Installation in Upflow and Downflow Applications 14 Installation in Horizontal Applications 16 Air Ducts .16 General Requirements .16 Ductwork Acoustical Treatment .16 Supply Air Connections 17 Return Air Connections .17 Filter Arrangement 18 Bottom Closure Panel .18 Gas Piping .19 Electrical Connections 20 115­v Wiring .20 24­v Wiring .20 Accessories 20 Direct Venting .21 Removal of Existing Furnaces from Common Vent Systems .21 Combustion-Air and Vent Piping .24 Vent Extension Pipe 28 Concentric Vent and Combustion-Air Termination Kit Installation 28 Multiventing and Vent Terminations 32 Condensate Drain 33 General .33 Application .33 Condensation Drain Protection .33 START-UP, ADJUSTMENTS AND SAFETY CHECK .33 General 33 Prime Condensate Trap With Water 35 Purge Gas Lines 35 Sequence of Operation 37 Heating Mode 37 Cooling Mode 37 Thermidistat Mode 40 Continuous Blower Mode .40 A93040 NOTE: Read the entire instruction manual before starting the installation.

This symbol indicates a change since the last issue. TABLE OF CONTENTS SAFETY CONSIDERATIONS .2 INTRODUCTION 3 CODES AND STANDARDS 3 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 3 APPLICATIONS 5 General 5 Upflow Applications .5 Condensate Trap Location (Factory-Shipped Orientation) 6 Condensate Trap Tubing (Factory-Shipped Orientation) 6 Condensate Trap Location (Alternate Upflow Orientation) 7 Condensate Trap Tubing (Alternate Upflow Orientation) 7 Condensate Trap Field Drain Attachment 8 Pressure Switch Tubing .8 Upper Collector Box and Inducer Housing (Unused) Drain Connections .8 Condensate Trap Freeze Protection 8 Downflow Applications 8 Condensate Trap Location 8 Condensate Trap Tubing .8 Condensate Trap Field Drain Attachment 9 Pressure Switch Tubing .9 Condensate Trap Freeze Protection 9 Horizontal Left (Supply-Air Discharge) Applications 9 Condensate Trap Location 9 Condensate Trap Tubing .10 Condensate Trap Field Drain Attachments 10 Pressure Switch Tubing .10 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535­80121 Printed in U.S.A. Form 58MXA-16SI Pg 1 12-03 Replaces: 58MXA-15SI Tab 6a 8a Heat Pump Mode .40 Component Test .