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Carrier 58MSA manual

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Table of contents for the manual

  • Page 1

    58MSA 4-Way Multipoise Fixed-Capacity Condensing Gas Furnace Service and Maintenance Instructions For Sizes 040—120, Series 110 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 ...........................................[...]

  • Page 2

    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. FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE T[...]

  • Page 3

    Step 1—Cleaning and/or Replacing Air Filter The air filter arrangement may vary depending on the application or orientation. Never operate unit without a filter or with the blower access panel removed. Failure to follow this warning could result in a fire or personal injury. To clean or replace the filters, proceed as follows: 1. Turn off electri[...]

  • Page 4

    11. Reinstall condensate trap and tubing if previously removed. a. Reinstall condensate trap in hole in blower shelf. b. Connect condensate trap drain tubes. See Fig. 8 or tubing diagram on main furnace door for proper tube location. (1.) Connect 1 tube (blue or blue and white striped) from collector box. (2.) Connect 1 tube (violet or unmarked) fr[...]

  • Page 5

    Never use matches, candles, flame, or other sources of ignition to check for gas leakage. Use a soap-and-water solution. Failure to follow this warning could result in a fire, personal injury, or death. 19. Replace main furnace door. Step 4—Cleaning Heat Exchangers The following items should be performed by a qualified service technician. PRIMARY[...]

  • Page 6

    Never use matches, candles, flame, or other sources of ignition to check for gas leakage. Use a soap-and-water solution. Failure to follow this warning could result in a fire, personal injury, or death. 18. Replace main furnace door. SECONDARY HEAT EXCHANGERS NOTE: The condensing side (inside) of the secondary heat exchangers CANNOT be serviced or [...]

  • Page 7

    4. Disconnect pressure switch tubes. 5. Disconnect vent pipe from inducer housing outlet by loosen- ing coupling clamp on inducer outlet. 6. Disconnect drain tube from inducer housing. (See Fig. 8.) 7. Remove inducer housing assembly by removing 4 bolts attaching assembly to cell panel. 8. Flush inside of collector box with water until discharge fr[...]

  • Page 8

    10. Replace main furnace door. Step 7—Electrical Controls and Wiring There may be more than 1 electrical supply to the unit. Check accessories and cooling unit for additional electrical supplies. The electrical ground and polarity for 115-v wiring must be maintained properly. Refer to Fig. 11 for field wiring information and to Fig. 15 for unit w[...]

  • Page 9

    4. BRIEFLY remove either wire from the main limit switch until the LED goes out, then reconnect it. Make sure limit switch wire does not contact any metallic component such as the gas valve. If wire is shorted, 3-amp fuse on control center will blow. NOTE: If wire to main limit is disconnected longer than 4 sec, the control senses limit circuit is [...]

  • Page 10

    1. Check for signs of physical damage to heat tape such as nicks, cuts, abrasions, gnawing by animals, etc. 2. Check for discolored heat tape insulation. If any damage or discolored insulation is evident, replace heat tape. 3. Check that heat tape power supply circuit is on. Step 10—Winterizing Freezing condensate left in the furnace will damage [...]

  • Page 11

    → Fig. 13—Inducer Housing Drain Tube A99118 → Fig. 14—Funnel in Drain and Antifreeze Running Through Trap A99119 11[...]

  • Page 12

    PCB BLOWER OFF DELAY SELECTION CHART 90 SEC 135 SE C 180 SE C 225 SE C GVR HI / L O RE LA Y SEC-1 SEC-2 WHT PL1 32 1 6 5 4 9 87 LED TEST/TWIN BLOWER OFF DEL AY G R Y W C HUM H S IR ID R B L W R BLOWER SPEED SELECT FU1 COOL HEAT L2 PL3 PL2 VAC 120 L1 PR1 1 2 1 2 3 PR2 24 V A C -3A FUSE SPARE-2 SPARE-1 EAC-1 EAC-2 C 1.5 AMP 12 PL5 WHT BRN GR N BLK ID[...]

  • Page 13

    → Fig. 16—Service Label A99107 SER VICE COMP ON ENT TE ST To in iti a te th e co m po n ent test se que nc e, sh u t OF F th e r oom the rm o st at o r disconnect t he "R" t hermostat lead. Brie fly short the TEST ter minal to t he "Com 24V " ter mi nal . S tat us L ED wi ll fl ash code an d th en t urn O N t he in du cer m [...]

  • Page 14

    Is circuit breaker closed? Close door switch and go to start. Is red LED status light on? Is door switch closed? Is red LED status light blinking rapidly without a pause? Is there 1 15v going to switch? Replace door switch. Replace control center . Replace transformer . Is red LED status light blinking ON/OFF slowly with a combination of short and [...]

  • Page 15

    11 NO PREVIOUS F A UL T - Faults are erased after 48 hrs or whenever power (1 15v or 24v) is interrupted. Run system through a heating or cooling cycle to check system. 12 BLO WER ON AFTER PO WER UP (115V OR 24V) - Normal operation. Blower will run for 90 sec when furnace power is interrupted during a call for heat, R-W closed. 13 LIMIT OR FLAME RO[...]

  • Page 16

    A94328 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including:  • Unit Familiarization • Maintenance  • Installation Overview • Operating Sequence A large selection of product, theory, and skills programs is availa[...]