Carrier 58MXA User Manual

58MXA
Deluxe 4–Way Multipoise Fixed-Capacity
Direct Vent Condensing Gas Furnace
Installation, Start-Up, and Operating Instructions
Sizes 040-140, Series 170
NOTE: Read the entire instruction manual before starting the
installation.
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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..........................7
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.....................................................9
Condensate Trap Field Drain Attachments ......................10
Pressure Switch Tubing.....................................................10
Condensate Trap Freeze Protection ..................................10
Construct a Working Platform..........................................10
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..........................................12
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
115–v Wiring.....................................................................20
24–v 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..............................................30
Multiventing and Vent Terminations................................32
Condensate Drain....................................................................33
General...............................................................................33
Application.........................................................................33
Condensation Drain Protection .........................................34
Sequence of Operation............................................................34
Heating Mode ....................................................................35
Cooling Mode....................................................................38
Thermidistat Mode ............................................................38
Continuous Blower Mode .................................................39
Heat Pump Mode...............................................................39
Component Test.................................................................39
START-UP PROCEDURES........................................................40
General ....................................................................................40
Prime Condensate Trap With Water......................................40
A93040
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 6a 8a
PC 101 Catalog No. 535–80114 Printed in U.S.A. Form 58MXA-15SI Pg 1 11-03 Replaces: 58MXA-14SI

Carrier 58MXA Specifications

General

Model	58MXA
Type	Gas Furnace
Efficiency Rating	80% AFUE
Blower Type	Variable Speed
Stages	Single-Stage
Efficiency	80% AFUE
Ignition Type	Hot Surface Ignition
Fuel Type	Natural Gas

Summary

SAFETY CONSIDERATIONS

INTRODUCTION AND STANDARDS

CODES AND STANDARDS

Details national and local codes for installation.

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

Procedures to prevent damage to electronic components from static discharge.

APPLICATIONS AND ORIENTATIONS

General Applications

General overview of furnace applications and required modifications.

Upflow Applications

Details for installing the furnace in an upflow configuration.

Downflow Applications

Details for installing the furnace in a downflow configuration.

Horizontal Applications

Details for installing the furnace in horizontal configurations.

Condensate Trap and Tubing Setup

Covers trap location, tubing, and drain attachment for all orientations.

INSTALLATION

Leveling Legs

Instructions for installing optional leveling legs.

Upflow and Downflow Installation

Details for installing the furnace in upflow and downflow.

Horizontal Installation

Details for installing the furnace in horizontal configurations.

Air Ducts

Requirements and considerations for air duct installation.

Gas Piping

Requirements and procedures for gas piping installation.

Electrical Connections

Instructions for making electrical connections.

Direct Venting System

Requirements for the direct-vent system.

START-UP PROCEDURES

General Start-Up

General requirements before starting up the furnace.

Condensate Trap Priming

Procedure for priming the condensate trap to ensure proper draining.

Gas Line Purge

Steps for purging gas lines and checking for leaks.

Adjustments

Procedures for adjusting furnace settings.

Safety Controls Verification

Verifying the proper operation of all safety controls.

CHECKLISTS

Installation Checklist

Key items to check during furnace installation.

Start-Up Checklist

Key items to check during furnace start-up.