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58MXA
4-Way Multipoise Fixed-Capacity
Direct-Vent Condensing Gas Furnace
Service and Maintenance Instructions
→ For Sizes 040—140, Series 130
NOTE: Read the entire instruction manual before performing any
service or maintenance.
This symbol → indicates a change since the last issue.
Index Page
SAFETY CONSIDERATIONS..................................................1-2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........2
GENERAL......................................................................................2
CARE AND MAINTENANCE................................................2-11
Cleaning and/or Replacing Air Filter.......................................3
Blower Motor and Wheel Maintenance................................3-4
Cleaning Burners...................................................................4-5
Cleaning Heat Exchangers ....................................................5-7
Primary Heat Exchangers ................................................5-7
Secondary Heat Exchangers................................................7
Flushing Collector Box and Drainage System ........................7
Servicing Hot Surface Ignitor...............................................7-8
Electrical Controls and Wiring.................................................8
Troubleshooting................................................................8-9-10
Checking Heat Tape Operation (If Applicable) ....................10
Winterizing ........................................................................10-11
WIRING DIAGRAM...................................................................12
SERVICE LABEL .......................................................................13
TROUBLESHOOTING GUIDE ............................................14-15
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 a 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. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
A93040
®
ama
CANADIAN GAS ASSOCIATION
APPROVED
R
As an ENERGY STAR®
Partner, Carrier Corporation
has determined that this prod-
uct meets the ENERGY
STAR® guidelines forenergy
efficiency.
®
• • • • • • • • • • • • • • •
ULTRA HIGH EFFICIENCY
GAS FURNANCE
®
A93007
REGISTERED QUALITY SYSTEM
Fig. 1—Multipoise Furnace in Upflow Orientation
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. 535-745 Printed in U.S.A. Form 58MXA-6SM Pg 1 5-99 Replaces: 58MXA-5SM