Carrier 58MCA Service And Maintenance Instructions

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Service and Maintenance Instructions
NOTE: Read the entire instruction manual before performing any
service or maintenance.
This symbol indicates a change since the last issue.
Index
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 .............................................8-9
Troubleshooting ...................................................................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, including NFPA 54/ANSI Z223.1-1996,
National Fuel Gas Code and ANSI/NFPA 90B, Installation Stan-
dards, Warm Air Heating and Air Conditioning Systems. In
Canada, refer to the current edition of the National Standard of
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101 Catalog No. 565-879
Tab 6a 8a
Direct-Vent Condensing Gas Furnace
For Sizes 040-140, Series 131
A93040
Page
Printed in U.S.A. Form 58MCA-4SM
4-Way Multipoise Fixed-Capacity
®
ama
A PP R O VED
R
SM
As an ENERGY STAR
Partner, Carrier Corporation
has determined that this prod-
uct meets the ENERGY
STAR guidelines for energy
efficiency.
CERTIFICATION OF MANUFACTURING SITE
Fig. 1-Multipoise Furnace in Upflow Orientation
Canada CAN/CGA-B-149. 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.
Pg 1
58MCA
A93278
11-96 Replaces: 58MCA-3SM
.