Carrier Furnace and Heat Pump Wiring Diagram Explained

12

PCB SEE NOTE #10

SW2

G

(WHEN USED)

TO 115VAC FIELD DISCONNECT

SCHEMATIC DIAGRAM

NOTE #4

BLOWER

PRS

LGPS

(NATURAL GAS & PROPANE)

R

L1

NEUTRAL

OFF

Y

ORN

EQUIPMENT GROUND

(NOT ON ALL MODELS)

DELAY

SW1

W

L2

C OM

ILK

LO

BLOWER OFF DELAY

HUM

SPARE-2

SELECTION CHART

TEST/TWIN

NOTE #6

YEL

MED LO

90

SEC

HEAT

MED HI

LED

L1

BLU

SPARE-1

HI

START

HI/LO

OL

135 SEC

BLWR

NOTE #8

RED

RED

1-M

3-P

COOL

CAP-1

COM

180 SEC

PL1

3

2

1

LS

FRS

COM

GV

BLWM

WHT

EAC-1

225 SEC

WHT

6

5

4

FSE

2-C

HSIR

EAC-2

9

8

7

RED

GVR

GRN

1

1

HSI

SEC-1

SEC-2

NOTE #5

IDM

BLU

BLK

TRAN

PL2

2

PL5

2

OL

M

HI/LO

RED

WHT

IDR

AUX

RELAY

24 VAC-3A

WHT (COM)

PR1

115VAC

PR2

1

1

BRN

GRN

FU1

FUSE

3

3

BRN

BLK (HI)

TRAN

BRN

PL3

PL4

OL

CAP -2

COOL

SPARE-1

24VAC

HSIR

IDR

BLWR

BLOWER

YEL (MED HI)

2

2

SPEED

NOTE #8

START

CAP -1

SELECT

TEST/TWIN

NOTE #7

HEAT

SPARE-2

FU1

BLU (MED LO)

PL3

L2

EAC-1

AMP

BRN

SEC-1

SEC-2

FRS

LS

NOTE #12

PL2

RED

(LO)

BLWM

GVR-2

120

VAC

1

1.5

HUM

7

1

2

EAC-2

L1

PR1

2

3

PR2

COM

1

R

WHT (COM)

LGPS

(WHEN USED)

WHT

BLK

GRN

WHT

WHT

W

BLK

4

BLK

BLK

BLK

WHT

CAP -2

1

2

3 PL4

FUSED DISCONNECT

HSIR

BLWR

HI/LO

NOTE #6

PL1

JB

SWITCH (WHEN REQ'D)

IDR

GVR

PRS

PL5

BRN

BRN

NOTE #4

1

2

WHT

M

IDM

ILK

WHT

NEUTRAL

GRN

3

AUX

3-P

OL

BLK

FU2

L1

GVR-1

GV

HSI

BLK

GRN

2

CPU

2-C

GRN

1-M

Y

8

NOTE #5

LEGEND		PL1	9-CIRCUIT CONNECTOR
						G	5
BLWR	BLOWER MOTOR RELAY, SPST-(N.O.)	PL2	2-CIRCUIT PCB CONNECTOR						FSE
BLWM	BLOWER MOTOR	PL3	3-CIRCUIT IDM CONNECTOR				6
CAP	CAPACITOR	PL4	3-CIRCUIT IDM EXTENSION CONNECTOR			COM
CPU	MICROPROCESSOR AND CIRCUITRY	PL5	2-CIRCUIT HSI/PCB CONNECTOR
EAC-1	ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)	PRS	PRESSURE SWITCH, SPST-(N.O.)	NOTES:			9
EAC-2	ELECTRONIC AIR CLEANER CONNECTION (COMMON)	SW1 & 2	BLOWER OFF DELAY
FRS	FLAME ROLLOUT SW. -MANUAL RESET, SPST-(N.C.)	TEST/TWIN	COMPONENT TEST & TWIN TERMINAL
				1.	IF ANY OF THE ORIGINAL EQUIPMENT WIRE IS REPLACED USE WIRE RATED FOR 105°C.
FSE	FLAME PROVING ELECTRODE	TRAN	TRANSFORMER-115VAC/24VAC
				2.	INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL
FU1	FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU2	FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE		JUNCTION	3.	AUTO-RESET THERMAL OVERLOAD SWITCHES (OL).
	(FIELD INSTALLED & SUPPLIED)		UNMARKED TERMINAL		BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS, SEE INSTALLATION
					INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEED SELECTION.
GV	GAS VALVE-REDUNDANT OPERATORS		PCB TERMINAL
GVR	GAS VALVE RELAY, DPST-(N.O.)			4.	USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH AND THE
HI/LO	BLOWER MOTOR SPEED CHANGE RELAY, SPDT		FACTORY WIRING (115VAC)		FURNACE JUNCTION BOX (JB).
HSI	HOT SURFACE IGNITOR (115 VAC)		FACTORY WIRING (24VAC)	5.	THIS WIRE MUST BE CONNECTED TO FURNACE SHEETMETAL FOR CONTROL TO PROVE
HSIR	HOT SURFACE IGNITOR RELAY, SPST-(N.O.)		FIELD WIRING (115VAC)		FLAME.
HUM	24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)			6.	FACTORY CONNECTED WHEN LGPS NOT USED.
IDM	INDUCED DRAFT MOTOR		FIELD WIRING (24VAC)	7.	REPLACE ONLY WITH A 3 AMP FUSE.
IDR	INDUCED DRAFT RELAY, SPST-(N.O.)		CONDUCTOR ON PCB	8.	YELLOW LEAD NOT ON ALL MOTORS.
ILK	BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N.O.)		FIELD WIRING TERMINAL	9.	BLOWER-ON DELAY, GAS HEATING 60 SECONDS, COOLING OR HEAT PUMP 2 SECONDS.
JB	JUNCTION BOX			10.	BLOWER-OFF DELAY, GAS HEATING 90, 135, 180 OR 225 SECONDS, COOLING OR
			FIELD GROUND
LED	LIGHT-EMITTING DIODE FOR STATUS CODES				HEAT PUMP 90 SECONDS. (135 SECONDS ONLY ON SOME MODELS)
LGPS	LOW GAS PRESSURE SWITCH, SPST-(N.O.)		EQUIPMENT GROUND	11.	IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUCCESSFUL
LS	LIMIT SWITCH, AUTO RESET, SPST(N.C.)		FIELD SPLICE		TRIALS-FOR-IGNITION. CONTROL WILL AUTO-RESET AFTER THREE HOURS.
OL	AUTO-RESET INTERNAL MOTOR OVERLOAD TEMP. SW.			12.	SOME MODELS MAY HAVE SPADE QUICK CONNECT TERMINALS.
			PLUG RECEPTACLE
PCB	PRINTED CIRCUIT BOARD							322854-101 REV. C

A95087

Fig. 16ÐWiring Diagram