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58TMA
Downflow/Horizontal 2-Speed, 2-Stage,
Induced-Combustion Gas Furnace
Installation, Start-Up, and Operating Instructions
Sizes 065-125, Series 111
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
Index Page
SAFETY CONSIDERATIONS.....................................................1
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE...........................................................................2
INTRODUCTION.......................................................................2-4
Dimensional Drawing ....................................................................2
Clearances to Combustibles......................................................3
LOCATION....................................................................................4
General......................................................................................4
Location Relative to Cooling Equipment ................................4
Hazardous Locations.................................................................4
AIR FOR COMBUSTION AND VENTILATION...................4-5
Unconfined Space.....................................................................4
Confined Space......................................................................4-5
SUPPLY-AIR PLENUM INSTALLATION
(DOWNFLOW).....................................................................5-6
Installation On Combustible Floor...........................................6
HORIZONTAL ATTIC INSTALLATION...................................7
HORIZONTAL CRAWLSPACE INSTALLATION....................7
FILTER ARRANGEMENT...........................................................7
GAS PIPING...............................................................................7-9
ELECTRICAL CONNECTIONS ................................................10
115-v Wiring...........................................................................10
24-v Wiring.............................................................................10
Accessories..............................................................................10
VENTING ....................................................................................10
START-UP, ADJUSTMENT, AND SAFETY CHECK.......10-22
General...............................................................................10-12
Sequence of Operation ......................................................12-16
Adaptive Heating Mode ....................................................12-14
Non-Adaptive Heating Mode .................................................14
Cooling Mode....................................................................14-15
Continuous Blower Mode.......................................................15
Heat Pump Mode....................................................................15
Defrost Mode.....................................................................15-16
Start-Up Procedures................................................................16
Adjustments .......................................................................16-22
Set Gas Input Rate ............................................................16-22
Set Temperature Rise ........................................................17-21
Set Thermostat Heat Anticipator ......................................21-22
Check Safety Controls............................................................22
Checklist..................................................................................23
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations must
be performed by trained service personnel. When working on
heating equipment, observe precautions in the literature, on tags,
and on labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. In the United States, refer to the National
Fuel Gas Code (NFGC) NFPA No. 54-1996/ANSI Z223.1-1996.
In Canada, refer to the current edition of the National Standard of
Canada CAN/CGA-B149.1- and .2-M95 Natural Gas and Propane
Installation Codes (NSCNGPIC). Wear safety glasses and work
gloves. Have fire extinguisher available during start-up and
adjustment procedures and service calls.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
®
ama
CANADIAN GAS ASSOCIATION
APPROVED
R
CERTIFICATION OF
MANUFACTURING SITE
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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. 535-887 Printed in U.S.A. Form 58TMA-6SI Pg 1 8-97 Replaces: 58TMA-4SI