58MTB
Deluxe 4–Way Multipoise 2-Stage
Condensing Gas Furnace
Installation, Start-up, and Operating Instructions
Sizes 060-120, Series 100
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: This furnace can be installed as a
direct vent (2-pipe)
or non-direct vent (1-pipe) condensing gas furnace.
This symbol → indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................2
CODES AND STANDARDS........................................................3
Safety.........................................................................................3
General Installation...................................................................3
Combustion and Ventilation Air..............................................5
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........6
INTRODUCTION..........................................................................6
APPLICATIONS............................................................................6
General ......................................................................................6
Upflow Applications.................................................................6
Downflow Applications............................................................8
Horizontal Left (Supply-Air Discharge) Applications ..........10
Horizontal Right (Supply-Air Discharge) Applications ........11
LOCATION..................................................................................14
General ....................................................................................14
Furnace Location Relative to Cooling
Equipment ...............................................................................15
Hazardous Locations...............................................................15
Furnace Location and Application.........................................15
AIR FOR COMBUSTION AND VENTILATION ....................16
INSTALLATION.........................................................................19
Leveling Legs (If Desired).....................................................19
Installation in Upflow and Downflow
Applications ............................................................................19
Installation in Horizontal Applications ..................................19
Air Ducts.................................................................................19
General Requirements .......................................................19
Ductwork Acoustical Treatment .......................................21
Supply Air Connections ....................................................21
Return Air Connections.....................................................21
Filter Arrangement..................................................................21
Bottom Closure Panel.............................................................23
Gas Piping...............................................................................24
Electrical Connections............................................................25
115-V Wiring.....................................................................25
24-V Wiring.......................................................................27
Accessories ........................................................................27
Removal of Existing Furnaces from Common Vent
Systems ..............................................................................28
Combustion-Air and Vent Pipe Systems ...............................28
Condensate Drain....................................................................42
General...............................................................................42
Application.........................................................................42
Condensation Drain Protection .........................................43
START-UP ADJUSTMENT AND SAFETY CHECK ..............43
General ....................................................................................43
Prime Condensate Trap With Water......................................44
Purge Gas Lines......................................................................44
Sequence of Operation............................................................44
Two-Stage Heating With Single-Stage Thermostat
(Adaptive Mode)................................................................45
Two-Stage Heating With Two-Stage Thermostat
(Non-Adaptive Heating Mode) .........................................45
Cooling Mode....................................................................46
Thermidistat Mode ............................................................46
Continuous Blower Mode .................................................50
Heat Pump .........................................................................50
Component Self-Test.........................................................50
Operate Furnace.................................................................51
Furnace Restart..................................................................51
Adjustments .............................................................................51
Set Gas Input Rate ............................................................51
Set Temperature Rise ........................................................56
Adjust Blower Off Delay (Heat Mode)............................57
Set Thermostat Heat Anticipator ......................................57
Check Safety Controls............................................................57
Checklist..................................................................................58
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 Printed in U.S.A. Catalog No. 58MTB-1SI Pg 1 8-05 Replaces: 58MTA-8SI
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