58MCB
4-Way Multipoise
Fixed-Capacity
Condensing Gas Furnace
Service and Maintenance Instructions
For Sizes 040—140, Series 100
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could result in
dangerous operation, serious injury, death, or property dam-
age.
Improper servicing could result in dangerous operation,
serious injury, death, or property damage.
- Before servicing, disconnect all electrical power to furnace.
- When servicing controls, label all wires prior to disconnect-
ing. Reconnect wires correctly.
- Verify proper operation after servicing.
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in possible damage
to this equipment, serious personal injury, or death.
The ability to properly perform maintenance on this equip-
ment requires certain expertise, mechanical skills, tools, and
equipment. If you do not possess these, do not attempt to
perform any maintenance on this equipment other than those
procedures recommended in the User’s Manual.
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could cause corrosion of heat
exchanger, fire, personal injury, or death.
Never store anything on, near, or in contact with the furnace,
such as:
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning com-
pounds, plastic or plastic containers, gasoline, kerosene,
cigarette lighter fluid, dry cleaning fluids, or other volatile
fluids.
3. Paint thinners and other painting compounds, paper bags,
or other paper products.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................1
GENERAL......................................................................................2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........2
CARE AND MAINTENANCE.....................................................3
Cleaning and/or Replacing Air Filter.......................................3
Blower Motor and Wheel Maintenance...................................3
Cleaning Burners ......................................................................5
Cleaning Heat Exchangers........................................................6
Primary Heat Exchangers ......................................................6
Secondary Heat Exchangers ..................................................8
Flushing Collector Box and Drainage System ........................8
Servicing Hot Surface Igniter...................................................9
Electrical Controls and Wiring.................................................9
Checking Heat Tape Operation (If Applicable) ....................10
Winterizing..............................................................................10
WIRING DIAGRAM...................................................................11
TROUBLESHOOTING ...............................................................11
Status Codes............................................................................11
Component Tests ....................................................................12
SAFETY CONSIDERATIONS
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 hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may 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
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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. 58MCB-1SM Pg 1 8-05 Replaces: 58MCA-10SM
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