Carrier 58MTA User Manual

58MTA
Deluxe 4–Way Multipoise 2-Stage
Direct Vent Condensing Gas Furnace
Installation, Start-up, and Operating Instructions
Sizes 060-120, Series 120
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..........................................................................2
CODES AND STANDARDS........................................................3
Safety.........................................................................................3
General Installation...................................................................3
Combustion and Ventilation Air ..............................................3
Duct Systems ............................................................................5
Acoustical Lining and Fibrous Glass Duct..............................5
Gas Piping and Gas Pipe Pressure Testing..............................5
Electrical Connections ..............................................................5
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........5
APPLICATIONS............................................................................6
General ......................................................................................6
Upflow Applications.................................................................6
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.....................................................9
Condensate Trap Field Drain Attachment........................10
Pressure Switch Tubing.....................................................10
Condensate Trap Freeze Protection ..................................10
Horizontal Left (Supply-Air Discharge) Applications ..........10
Condensate Trap Location ................................................10
Condensate Trap Tubing...................................................10
Condensate Trap Field Drain Attachments ......................10
Pressure Switch Tubing.....................................................10
Condensate Trap Freeze Protection ..................................11
Construct a Working Platform..........................................11
Horizontal Right (Supply-Air Discharge) Applications ........11
Condensate Trap Location ................................................11
Condensate Trap Tubing...................................................13
Condensate Trap Field Drain Attachment........................13
Pressure Switch Tubing.....................................................13
Condensate Trap Freeze Protection ..................................13
Construct a Working Platform..........................................13
LOCATION..................................................................................13
General ....................................................................................13
Furnace Location Relative to Cooling
Equipment ...............................................................................14
Hazardous Locations...............................................................15
INSTALLATION.........................................................................15
Leveling Legs (If Desired).....................................................15
Installation in Upflow and Downflow
Applications ............................................................................15
Installation in Horizontal Applications ..................................17
Air Ducts.................................................................................17
General Requirements .......................................................17
Ductwork Acoustical Treatment .......................................17
Supply Air Connections ....................................................17
Return Air Connections.....................................................17
Filter Arrangement..................................................................18
Bottom Closure Panel.............................................................19
Gas Piping...............................................................................20
Electrical Connections ............................................................20
115-V Wiring.....................................................................22
24-V Wiring.......................................................................23
Accessories ........................................................................23
Direct Venting.........................................................................23
Removal of Existing Furnaces from Common Vent
Systems ..............................................................................23
Combustion-Air and Vent Piping .....................................25
Concentric Vent and Combustion-Air Termination
Kit Installation...................................................................30
Multiventing and Vent Terminations................................33
Condensate Drain....................................................................33
General...............................................................................33
Application.........................................................................34
Condensation Drain Protection .........................................34
START-UP ADJUSTMENT AND SAFETY CHECK ..............34
General ....................................................................................34
Prime Condensate Trap With Water......................................37
Purge Gas Lines......................................................................37
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. 535–80129 Printed in U.S.A. Form 58MTA-7SI Pg 1 5-04 Replaces: 58MTA-6SI

Carrier 58MTA Specifications

General

Model	58MTA
Type	Gas Furnace
Efficiency Rating	80% AFUE
Blower Type	Multi-speed
Ignition Type	Hot Surface Ignition
Stages	Single Stage
Efficiency	80% AFUE
Heat Exchanger	Aluminized Steel
Fuel Type	Natural Gas
Blower Motor	PSC

Summary

SAFETY CONSIDERATIONS

General Safety Warnings

General safety warnings and precautions for furnace installation and operation.

Furnace Reliability Hazard

Fire, Explosion, Electrical Shock, Carbon Monoxide Warning

Warnings about fire, explosion, shock, and CO hazards.

CODES AND STANDARDS

National and Local Codes

INSTALLATION

Upflow and Downflow Applications

Horizontal Applications

Air Ducts

Filter Arrangement

Gas Piping

Requirements for safe and compliant gas piping installation.

Electrical Connections

Procedures for making safe and correct electrical connections.

Direct Venting

Requirements for installing the direct-vent system for combustion air and exhaust.

Condensate Drain

COMPONENT SELF-TEST

Component Test Procedure

How to run a diagnostic test on furnace components.

Adjustments

Set Gas Input Rate

Procedures to adjust gas input rate based on altitude and fuel.

Set Temperature Rise

How to check and set the air temperature rise within specified limits.

Check Safety Controls

Procedures to verify the proper function of safety controls.