Carrier 58MCA manual

58MCA 4-Way Multipoise Fixed-Capacity Direct-Vent Condensing Gas Furnace Service and Maintenance Instructions → For Sizes 040—140, Series 131 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 ...........................[...]

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[...]

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[...]

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[...]

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[...]

Fig. 8—Furnace Pressure and Drain Tubing Diagram A96212 Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below. 322593-101 REV. A NOTE: This appliance requires a special venting system. Refer to the installation instructions for parts list and method of installation. Furnace mus[...]

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 [...]

Allow ignitor to cool before removal. Normal operation temperatures exceed 2000°F. a. Do not remove ignitor from retainer while assembly is in furnace. Using a small pocket straight-blade screwdriver, slowly pry 1 edge of the spring retainer from burner box housing. While working ignitor assembly loose, grasp white ceramic block to wiggle assembly[...]

NOTE: If the polarity is not correct, the STATUS LED on the control center will flash rapidly and prevent the furnace from operating. The control system also requires an earth ground for proper operation of the control center and flame sensing. The 24-v circuit contains an automotive-type, 3-amp fuse located on the control center. (See Fig. 13.) An[...]

NOTE: Leave blower access panel installed to maintain power to control center to view current LED status. 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[...]

Fig. 14—Inducer Housing Drain Tube A94208 Fig. 15—Funnel in Drain and Antifreeze Running Through Trap A94209 11[...]

Fig. 16—Wiring Diagram A95087 PCB BLOWER OFF DELAY SELECTION CH AR T 90 SEC 135 SEC 180 SEC 225 SEC GVR HI/LO RELAY SEC-1 SEC- 2 WHT PL1 3 2 1 6 5 4 9 87 LED TEST/TWIN BLOWER OFF DELAY G R Y W C HUM HSIR IDR BLWR BLOWER SPEED SELECT FU1 COOL HEAT L2 PL3 PL2 VAC 120 L1 PR1 1 2 1 2 3 PR2 24 VAC-3A FUSE SPARE-2 SPARE-1 EAC-1 EAC-2 C 1.5 AMP 12 PL5 W[...]

→ Fig. 17—Service Label A96263 SERVICE 11 NO PREVIOUS CODE - Stored status cod es are erased when p ower (115V o r 24V) to control is interrupted or 48 hours after ea ch fault is cleare d. 12 BLOWER ON AFTER POWER UP (115V o r 24V) - Blower runs for 90 seconds, if unit is power ed up during a call for hea t (R-W closed). 13 LIMIT OR FLAME ROLL-[...]

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 115v going to switch? Replace door switch. Replace control center. Replace transformer. Is red LED status light blinking ON/OFF slowly with a combination of shor[...]

11 NO PREVIOUS FAULT - Faults are erased after 48 hrs or whenever power (115v or 24v) is interrupted. Run system through a heating or cooling cycle to  check system. 12 BLOWER ON AFTER POWER UP (115V OR 24V) - Normal  operation. Blower will run for 90 sec when furnace power is interrupted during a call for heat, R-W cl[...]

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[...]