58DXT
Downflow 2-Speed, 2-Stage,
Induced-Combustion Gas Furnace
Installation, Start-Up, and Operating Instructions
Sizes 060-100, Series 110 or 120
NOTE:
Read the entire instruction manual before starting the
installation.
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Index
Page
SAFETY CONSIDERATIONS .....................................................1
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE ...........................................................................2
INTRODUCTION.......................................................................2-3
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 .....................................................................5
Confined Space .........................................................................5
AIR DUCTS...................................................................................6
General Requirements...............................................................6
Ductwork Acoustical Treatment...............................................6
Supply Air Connection .............................................................6
Return Air Connections ............................................................6
SUPPLY-AIR PLENUM INSTALLATION
(DOWNFLOW) ........................................................................6
Downflow Installation .............................................................6
Installation On Combustible Floor...........................................6
FILTER ARRANGEMENT...........................................................7
GAS PIPING...............................................................................7-8
ELECTRICAL CONNECTIONS ..................................................9
115-v Wiring.............................................................................9
24-v Wiring...............................................................................9
Accessories .............................................................................. 9
VENTING ......................................................................................9
START-UP, ADJUSTMENT, AND SAFETY CHECK .......10-22
General ....................................................................................10
Sequence of Operation ......................................................10-14
Adaptive Heating Mode ....................................................11-13
Non-Adaptive Heating Mode .................................................13
Cooling Mode .........................................................................14
Continuous Blower Mode.......................................................14
Heat Pump Mode ....................................................................14
Defrost Mode ..........................................................................15
Start-Up Procedures ................................................................15
Adjustments .......................................................................15-21
Set Gas Input Rate ............................................................15-19
Set Temperature Rise..............................................................20
Set Thermostat Heat Anticipator............................................21
Check Safety Controls ............................................................21
Checklist..................................................................................22
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, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA
54-1996/ANSI Z223.1-1996 and the Installation Standards, Warm
Air Heating and Air Conditioning Systems (NFPA 90B)
ANSI/NFPA 90B. In Canada, refer to the CAN/CGA-B149.1- and
.2-M95 National Standard of Canada, 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, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER 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. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
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
A PP R O VED
R
REGISTERED QUALITY SYSTEM
Visit www.carrier.com
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. 535-732
Printed in U.S.A.
Form 58DXT-4SI
Pg 1
7-99
Replaces: 58DXT-3SI
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