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CANADIAN GAS ASSOCIATION
58MSA
4-Way Multipoise Fixed-Capacity
Condensing Gas Furnace
Visit www.carrier.com
Service and Maintenance Instructions
For Sizes 040—120, Series 110
®
ama
APPROVED
A93040
R
NOTE: Read the entire instruction manual before performing any
service or maintenance.
This symbol → indicates a change since the last issue.
Index Page
As an ENERGY STAR®
SAFETY CONSIDERATIONS..................................................1-2
Partner, Carrier Corporation
ELECTROSTATIC DISCHAR
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GENERAL These instructions are written as if the furnace is installed in an The ability to properly perform maintenance on this equip- upflow application. An upflow furnace application is where the ment requires certain expertise, mechanical skills, tools, and blower is located below the combustion and controls section of the equipment. If you do not possess these, do not attempt to furnace, and conditioned air is discharged upward. Therefore, perform any maintenance on this equipment other than
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WASHABLE
FILTER FILTER
RETAINER WASHABLE
FILTER FILTER
FILTER
RETAINER SUPPORT A93046 A93045 Fig. 3—Bottom Filter Arrangement Fig. 4—Filter Installed for Side Inlet Step 1—Cleaning and/or Replacing Air Filter All factory wires can be left connected, but field thermostat connections may need to be disconnected depending on their The air filter arrangement may vary depending on the application length and routing. or orientation. 4. Position control box, transformer, and door switch assembly t
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11. Reinstall condensate trap and tubing if previously removed. 5. Remove wires from gas valve. Note location for reassembly. 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. Label all wires prior to disconnection when servicing con- (1.) Connect 1 tube (blue or blue and white striped) from trols. Wiring errors can cause improper and dangerous collector box. operation. (2.) Co
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PRIMARY HX
INLET OPENINGS 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 HEAT EXCHANGERS If the heat exchangers get an accumulation of light dirt or dust on the inside, they may be cleaned by the f
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TUBE ROUTING Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below. Condensate Trap on LEFT Condensate Trap; Factory Installed Tube location when used in UPFLOW application Side Optional in Blower Shelf BURNER ENCLOSURE BURNER ENCLOSURE (Blower access panel removed) PRESSURE REFERENCE PRESSURE REFERENCE TUBE ASSEMBLY TUBE ASSEMBLY CAP CAP COLLECTOR BOX TUBE (PINK) PLUG PLUG COLLECTOR BOX TUBE COLLECTOR BOX TUBE (PINK) COLLECTO
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4. Disconnect pressure switch tubes. 14. Check furnace operation through 2 complete heat operating cycles. Check area below inducer housing, vent pipe, and 5. Disconnect vent pipe from inducer housing outlet by loosen- condensate trap to ensure no condensate leaks occur. If leaks ing coupling clamp on inducer outlet. are found, correct the problem. 6. Disconnect drain tube from inducer housing. (See Fig. 8.) 15. Check for gas leaks. 7. Remove inducer housing assembly by removing 4 bolts attachin
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10. Replace main furnace door. NOTE: Removing blower access panel will open blower access panel door switch and terminate 115-v power to control center, and Step 7—Electrical Controls and Wiring fault code will be erased. Look into blower access panel sight glass for current LED status. The unit’s component test is a useful troubleshooting tool since it displays the current status (fault code) of the furnace and func- There may be more than 1 electrical supply to the unit. Check tionally operate
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24-V THERMOSTAT
TERMINALS
TEST/TWIN HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX) HUM LED OPERATION &
DIAGNOSTIC LIGHT HARNESS CONNECTOR SEC-1 24-V TRANSFORMER SEC-2 3-AMP FUSE SPARE-1 COOL BLOWER SPEED
HEAT SELECTION TERMINALS SPARE-2 EAC-1 EAC-ELECTRONIC AIR CLEANER
TERMINALS (115-VAC 1.5 AMP MAX) 115-VAC (L1)
EAC-2 POWER SUPPLY 115-VAC (L2) NEUTRAL
CONNECTION HOT SURFACE
INDUCER MOTOR
IGNITOR CONNECTOR CONNECTOR A95086 Fig. 12—Control Center 4. BRIEFLY remove either wire from the main
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3. Check that heat tape power supply circuit is on. Step 10—Winterizing Freezing condensate left in the furnace will damage the equipment. If the furnace will be off for an extended period of time in a 32°F MINIMUM INSTALLED
structure where the temperature will drop to 32°F or below, AMBIENT OR FREEZE
winterize as follows: PROTECTION REQUIRED 1. Turn off electrical supply to furnace. 2. Remove main furnace door. 3. Disconnect drain tube from inducer housing. (See Fig. 13.) 4. Insert funnel in
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A99118 A99119 → Fig. 13—Inducer Housing Drain Tube → Fig. 14—Funnel in Drain and Antifreeze Running Through Trap 11
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TO 115VAC FIELD DISCONNECT SCHEMATIC DIAGRAM (WHEN USED) SW2 G NOTE #4 LGPS BLOWER PRS NEUTRAL R (NATURAL GAS & PROPANE) PCB SEE NOTE #10 L1 OFF Y GND EQUIPMENT GROUND ORN DELAY W (NOT ON ALL MODELS) SW1 COM L2 ILK LO HUM BLOWER OFF DELAY SPARE-2 MED LO SELECTION CHART TEST/TWIN NOTE #6 YEL HEAT MED HI LED L1 90 SEC BLU HI START SPARE-1 OL HI/LO NOTE #8 BLWR 135 SEC RED 3-P RED 1-M COOL CAP-1 COM PL1 180 SEC 32 1 LS FRS COM GV BLWM EAC-1 4 WHT 6 5 225 SEC FSE WHT HSIR 9 87 2-C EAC-2 RED GRN 1 1
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TEST STATUS 3 2 1 6 5 4 9 7 8 SERVICE If status code recall is needed, do not remove power or blower door. Briefly remove and then reconnect one main limit wire to display stored status code. LED CODE STATUS CONTINUOUS OFF - Check for 115VAC at L1 and L2, and 24VAC at SEC-1 and SEC-2. CONTINUOUS ON - Control has 24V power. RAPID FLASHING - Line voltage (115V) polarity reversed. If twinned, refer to twinning kit instructions. EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIR
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14 → Troubleshooting Guide START NO NO NO Is red LED status light on? Is there 115v at L1 and L2? Is door switch closed? Close door switch and go to start. YES YES YES NO NO NO Is there 24v at SEC-1 and SEC-2? Is there 115v going to switch? Is circuit breaker closed? YES YES YES Replace control center. Replace door switch. Close circuit breaker and go back to start. Replace transformer. Check for continuity in wire from circuit Is red LED status light blinking Check for correct line voltage brea
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15 31 PRESSURE SWITCH WILL NOT CLOSE OR REOPEN - If 11 NO PREVIOUS FAULT - Faults open longer than 5 minutes, Unplug ignitor harness from control are erased after 48 hrs or inducer shuts off for 15 minutes center and inititate another whenever power (115v or 24v) is before retry. component test sequence. Check NO Replace control center. interrupted. Run system through Check for: for 115v between pins 1 and 2 on a heating or cooling cycle to • Proper vent sizing or pitch or the control center.
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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 available, using popular video-based formats and materials. All include video and/or slides, plus companion book.
Classroom Service Training plus "hands-on" the products in our labs can mean
