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