58DXT, 58UXT
WeatherMaker® 8000 Two-Stage
Induced-Combustion Gas Furnaces
Service and Maintenance Instructions
For Sizes 060-120, Series 110 or 120
NOTE: Read the entire instruction manual before performing any
service or maintenance.
This symbol → indicates a change since the last issue.
These procedures are for size 60,000 through 120,000 Btuh units.
Index Page
SAFETY CONSIDERATIONS..................................................1-2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE...........................................................................2
CARE AND MAINTENANCE..................................................2-6
Air Filter Arrangement..........................................................2-3
Blower Motor and Wheel......................................................3-4
Cleaning Heat Exchanger......................................................4-6
Electrical Controls and Wiring.................................................6
Troubleshooting...................................................................6-10
Unit Wiring Diagram................................................................8
Service Label ............................................................................9
Troubleshooting Guide ...........................................................10
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, tags, and
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 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 Gas Installation Codes and Amendment
No. 1. 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 furnace 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 a hazard
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.
Fig. 3—Model 58UXT Upflow
A94085
Fig. 2—Model 58DXT
Downflow
A94086
Fig. 1—Model 58UXT Horizontal
A95137
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CANADIAN GAS ASSOCIATION
APPROVED
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. 535-740 Printed in U.S.A. Form 58D,U-7SM Pg 1 7-99 Replaces: 58D,U-4SM
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