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Fig. 15—wiring diagram 11 – Carrier 4-WAY MULTIPOISE FIXED-CAPACITY DIRECT-VENT CONDENSING GAS FURNACE 58MXA User Manual

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PCB

BLOWER OFF DELAY

SELECTION CHART

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 8 7

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

A

M

P

1

2

PL5

WHT

BRN

GRN

BLK

IDM

BRN

CAP -2

WH

T

WH

T

BL

K

BL

K

HSI

AUX

OL

M

BLK

WHT

WHT (COM)

RED (LO)

BLU (MED LO)

NOTE #8

OL

START

BLWM

YEL (MED HI)

BLK (HI)

BRN

BRN

TR

A

N

BLU

RED

BLK

WHT

WHT (COM)

GRN

CAP -1

GRN

2-C

RED

FSE

NOTE #5

1-M

3-P

GV

FRS

BLU

YEL

RED

NOTE #6

LS

RED

ORN

PRS

(WHEN USED)

LGPS

FUSED DISCONNECT

SWITCH (WHEN REQ'D)

NOTE #4

WHT

GRN

GRN

JB

LEGEND

BLWR

BLOWER MOTOR RELAY, SPST-(N.O.)

BLWM BLOWER MOTOR
CAP

CAPACITOR

CPU

MICROPROCESSOR AND CIRCUITRY

EAC-1

ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)

EAC-2

ELECTRONIC AIR CLEANER CONNECTION (COMMON)

FRS

FLAME ROLLOUT SW. -MANUAL RESET, SPST-(N.C.)

FSE

FLAME PROVING ELECTRODE

FU1

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

FU2

FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE
(FIELD INSTALLED & SUPPLIED)

GND

EQUIPMENT GROUND

GV

GAS VALVE-REDUNDANT OPERATORS

GVR

GAS VALVE RELAY, DPST-(N.O.)

HI/LO

BLOWER MOTOR SPEED CHANGE RELAY, SPDT

HSI

HOT SURFACE IGNITOR (115 VAC)

HSIR

HOT SURFACE IGNITOR RELAY, SPST-(N.O.)

HUM

24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)

IDM

INDUCED DRAFT MOTOR

IDR

INDUCED DRAFT RELAY, SPST-(N.O.)

ILK

BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N.O.)

JB

JUNCTION BOX

LED

LIGHT-EMITTING DIODE FOR STATUS CODES

LGPS

LOW GAS PRESSURE SWITCH, SPST-(N.O.)

LS

LIMIT SWITCH, AUTO RESET, SPST(N.C.)

OL

AUTO-RESET INTERNAL MOTOR OVERLOAD TEMP. SW.

PCB

PRINTED CIRCUIT BOARD

PL1

9-CIRCUIT CONNECTOR

PL2

2-CIRCUIT PCB CONNECTOR

PL3

3-CIRCUIT IDM CONNECTOR

PL4

3-CIRCUIT IDM EXTENSION CONNECTOR

PL5

2-CIRCUIT HSI/PCB CONNECTOR

PRS

PRESSURE SWITCH, SPST-(N.O.)

SW1 & 2

BLOWER OFF DELAY

TEST/TWIN

COMPONENT TEST & TWIN TERMINAL

TRAN

TRANSFORMER-115VAC/24VAC

JUNCTION

UNMARKED TERMINAL

PCB TERMINAL

FACTORY WIRING (115VAC)

FACTORY WIRING (24VAC)

FIELD WIRING (115VAC)

FIELD WIRING (24VAC)

CONDUCTOR ON PCB

FIELD WIRING TERMINAL

FIELD EARTH GROUND

EQUIPMENT GROUND

FIELD SPLICE

PLUG RECEPTACLE

L1

L1

BLWR

HI/LO

TO 115VAC FIELD DISCONNECT

NOTE #4

EQUIPMENT GROUND

SPARE-1

HEAT

SPARE-2

COOL

NOTE #8

COM

HSIR

EAC-1

START

OL

COM

HI

MED HI

MED LO

LO

BLWM

SCHEMATIC DIAGRAM

(NATURAL GAS & PROPANE)

EAC-2

1

1

HSI

2

PL5

2

PL2

3

PL3

PR2

115VAC

PR1

TRAN

24VAC

1

2

BRN

M

IDR

TEST/TWIN

FU1

NOTE #7

IDM

OL

AUX

BRN

CAP -2

CAP-1

L2

FRS

LS

LGPS

(WHEN USED)

NOTE #6

PL1

PRS

GV

2-C

1-M

3-P

NOTE #5

8

FSE

9

6

5

CPU

HSIR

IDR

BLWR

Y

G

C

R

W

GVR-2

SEC-1

HI/LO

GVR

GVR-1

SEC-2

NOTES:

322854-101 REV. D (LIT)

1. IF ANY OF THE ORIGINAL EQUIPMENT WIRE IS REPLACED USE WIRE RATED FOR 105˚C.
2. INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL

AUTO-RESET THERMAL OVERLOAD SWITCHES (OL).

3. BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS, SEE INSTALLATION

INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEED SELECTION.

4. USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH AND THE

FURNACE JUNCTION BOX (JB).

5. THIS WIRE MUST BE CONNECTED TO FURNACE SHEETMETAL FOR CONTROL TO PROVE

FLAME.

6. FACTORY CONNECTED WHEN LGPS NOT USED.
7. REPLACE ONLY WITH A 3 AMP FUSE.
8. YELLOW LEAD NOT ON ALL MOTORS.
9. BLOWER-ON DELAY, GAS HEATING 60 SECONDS, COOLING OR HEAT PUMP 2 SECONDS.
10. BLOWER-OFF DELAY, GAS HEATING 90, 135, 180 OR 225 SECONDS, COOLING OR

HEAT PUMP 90 SECONDS. (135 SECONDS ONLY ON SOME MODELS)

11. IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUCCESSFUL

TRIALS-FOR-IGNITION. CONTROL WILL AUTO-RESET AFTER THREE HOURS.

12. SOME MODELS MAY HAVE SPADE QUICK CONNECT TERMINALS.

BL

K

OM

SW2

SW1

OM

2

3

4

7

1

OM

HUM

1 2 3

WH

T

BL

K

GR

N

PL4

PL4

2

3

1

NEUTRAL

NEUTRAL

WHT

ILK

FU2

BLK

L1

ILK

(NOT ON ALL MODELS)

SEE NOTE #10

NOTE #12

GND

GND

A99106

Fig. 15—Wiring Diagram

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