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58YAV
Induced-Combustion Furnaces
Visit www.carrier.com
Service and Maintenance Instructions
For Sizes 070-155, Series 110 and 120
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS .....................................................1
INTRODUCTION..........................................................................1
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PRO-
CEDURE .........
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HUM COM W Y R G 24V ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE Turn off gas and electrical supplies to unit before performing any maintenance or service on it. Follow operating instruc- tions on label attached to furnace. A failure to follow this Electrostatic discharge can affect electronic components. warning could result in personal injury. Take precautions during furnace installation and servicing to protect the furnace electronic control. Precautions will pre- The minimum maintenan
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d. If equipped with permanent, washable filter, clean filter by NOTE: Mark blower mounting arms, motor, and blower housing spraying cold tap water through filter in opposite direction so motor and each arm is positioned at the same location during of airflow. Rinse filter and let dry. Oiling or coating of the reassembly. filter is not recommended. c. Mark blower wheel orientation and cutoff plate location to e. If equipped with factory-specified disposable media filter, ensure proper reassembly.
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14. If furnace is operating properly, REMOVE TAPE TO RE- 13 11 32" 32" LEASE BLOWER ACCESS DOOR SWITCH, replace BURNER blower access door. Step 3—Cleaning Heat Exchanger The following steps should be performed by a qualified service technician: CELL PANEL NOTE: If the heat exchangers get a heavy accumulation of soot and carbon, they should be replaced rather than trying to clean them thoroughly due to their intricate design. A build-up of soot HOT and carbon indicates that a problem exists which
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10. Clean flame sensor with fine steel wool 11. Remove old sealant from center panel and collector box flange Never use a match or other open flame to check for gas leaks. and apply new sealant to collector box flange and reinstall on Use a soap-and-water solution. A failure to follow this center panel, making sure all 8 screws are secure. warning could result in fire, personal injury, or death. NOTE: A releasing agent such as PAM cooking spray or equiva- 19. Replace control door. lent (must not
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6 (WHEN USED) SCHEMATIC DIAGRAM (WHEN USED) TO 115VAC FIELD DISCONNECT SW2 G NOTE #14 NOTE #11 (WHEN USED) BLOWER (NATURAL GAS & PROPANE) L1 L2 DSS BVSS ALS PRS R LGPS OFF PCB NOTE #9 NOTE #4 EQUIPMENT GROUND Y DELAY ORN ORN ORN ORN ORN SW1 (NOT ON ALL MODELS) L2 W ILK LO COM BLOWER OFF DELAY SPARE-2 MED LO SELECTION CHART YEL HUM HEAT MED HI NOTE #13 NOTE #14 TEST/TWIN HI 90 SEC START SPARE-1 OL L1 HI/LO NOTE #7 LED BLWR 135 SEC COOL BLU LS CAP NOTE #15 180 SEC COM COM RED BLWM PL1 EAC-1 3 1 2
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BLOWER OFF DELAY ADJUSTMENT SWITCH 24-V THERMOSTAT G TERMINALS R Y W TEST/TWIN HUMIDIFIER TERMINAL Com 24V (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 (BLACK) EAC-ELECTRONIC AIR CLEANER TERMINALS (115-VAC 1 AMP MAX) 115-VAC (L1) EAC-2 (WHITE) POWER SUPPLY 115-VAC (L2) NEUTRAL CONNECTION HOT SURFACE INDUCER MOTOR IGNITOR CONNECTOR CONNECTOR A00292 Fig. 7—Furnace
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TEST LED 1 32 6 5 4 9 8 7 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 24VAC power. RAPID FLASHING - Line voltage (115VAC) polarity reversed. If twinned, refer to twinning kit instructions. EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST
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g. If LED status indicates proper operation, RELEASE BLOWER ACCESS DOOR SWITCH, replace blower Blower access door switch opens 115-v power to control. No access door, and replace control access door. component operation can occur. Caution must be taken when WIRING DIAGRAMS manually closing this switch for service purposes. Failure to follow this warning could result in personal injury or death. Refer to Fig. 5, 6, and 7 for the 58YAV furnace wiring diagrams. d. BRIEFLY short (jumper) TEST, 3/16
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10 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 breake
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11 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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Copyright 2000 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 58yav3sm 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. 535-771 Printed in U.S.A. Form 58YAV–3SM Pg 12 10-00 Replaces: 58YAV–2SM Tab 6a 8a
