Bryant 331JAV 324459-101REV. D, → -UnitWiring Diagram, Connection Diagram, Stage, Onoff Control

CONNECTION DIAGRAM

LS FRS2 LPS NOTE #8

RED

ORN

GRY

HPS

BRN

HI

YEL

P

RED

RED

LGPS

BRN

BLU

GV

DSS

C

M

ORN

GRN/YEL

GRN/YEL

RED

#8NOTE

USED)(WHEN

FSE

IDM

L1

BLK

FRS1

HSI

FUSED DISCONNECT

(WHEN USED)

ALS1

GRN/YEL

SWITCH (WHEN REQ’D)

ILK

JB

NOTE #1

SET-UP

(WHEN USED)

WHT

GRY

RED

HEAT

ORN

NOTE #6

PL6

WHT

L2

WHT

FU2

SWITCH

SWITCH

1

2

GND

1

2

NORM

ALS2

YEL

BLK

BLK

WHT

HI HT *

BLK

LO HT

ON OFF

ON OFF

ORN

WHT

1

2

3

PL3

BLOWER-

OFF DELAY SWITCH

WHT

RED

(SEC.)

3

4

BLK

90 SEC

*

PL2

BLK

135 SEC

1

WHT

7

180 SEC

2-STAGE

2

8

225 SEC

BLU

YEL

ON OFF

ONOFF CONTROL

3

9

FURNACE

FACTORY

SETTINGS

BLK

1

BLU

BRN

GRY

PR1

PR2

MED HI

YEL

GRN/YEL

HIGH-HEAT ONLY

GRN/YELP1

WHT

CAP

BLK

L1

L2

WHT

*

ORN

COMMON

NOTE #4

BRN

BRN

HI-COOL

4

BLOWER-OFF DELAY

RED

COM

WHT

TRAN

3

BLOWER-OFF DELAY

RED

HI-GAS EAC-2

HI

BLK

2

LOW-HEAT ONLY

HEAT

—

ON

OFF

321

12

LO-GAS

EAC-1

NOTE #15

MED

ORN

RED

BLU

TWIN

10

HEAT

MED LO

BLU

TEST

TJ

11

SPARE

SPARE

LO

BLWM

M

RED

8

SEC1

RED

LED S

BLU

—

W2

Com W/W1

Y/Y2 R

G HUM

SEC2

FU1

24V

LEGEND

TO 115VAC FIELD

SCHEMATIC DIAGRAM

(NATURAL GAS & PROPANE)

EQUIPMENT

DISCONNECT SWITCH

NOTE #1

GROUND

ILK

BHI / LOR

LO-GAS-HEAT

LO

L2

MED LO

BLWM

BHT / CLR

HI-GAS-HEAT

NOTE #15

L1

BLWR

SPARE

MED

HI

COM

HI-COOL

SPARE

MED HI

NOTE #4

BRN

BRN

COMMON

HSIR

EAC-1

EAC-2

CAP

PL2

3

PL6

1

HSI

2

IHI / LOR

9

LO

IDR

4

PL3

2

HI

1

7

3 COM

IDM

PR1

PR2

8

115VAC

FU1

SEC1

TRAN

SEC2

1

24VAC

HPSR

5 N/A

NOTE #5

6

N/A

2

12 N/A

FRS2

HUM

MGVR-2

2

FRS1

LS

3 (WHEN USED)

R

9

ALS2

ALS1

TWIN

TWINNING

TEST

6

S

JUMPER

PL1

DSS

TJ

W/W1		NOTE #8 LPS
M	5	(WHEN USED)
		LGPS
SW1		NOTE #8
	4

ALS1	AUXILIARY LIMIT SWITCH, OVERTEMP. MANUAL RESET, SPST (N.C.)
ALS2	AUXILIARY LIMIT SWITCH, OVERTEMP. AUTO RESET, SPST (N.C.)
BHI / LOR	BLOWER MOTOR SPEED CHANGE RELAY, SPDT
BHT / CLR BLOWER MOTOR SPEED CHANGE RELAY, SPDT
BLWM	BLOWER MOTOR, 4 or 5 -SPEED, PERMANENT-SPLIT-CAPACITOR
BLWR	BLOWER MOTOR RELAY, SPST (N.O.)
CAP	CAPACITOR
CPU	MICROPROCESSOR AND CIRCUITRY
DSS	DRAFT SAFEGUARD SWITCH (N.C.)
EAC-1	ELECTRONIC AIR CLEANER CONNECTION (115 VAC, 1 AMP MAX.)
EAC-2	ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS1	FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FRS2	FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FSE	FLAME-PROVING SENSOR ELECTRODE
FU1	FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU2	FUSE, FIELD INSTALLED
GV	GAS VALVE, REDUNDANT LOW-HEAT OPERATORS, 2-STAGE
HPS	HIGH-HEAT PRESSURE SWITCH, SPST (N.O.)

MGVR	MAIN GAS VALVE RELAY, DPST (N.O.)
	-1 = VALVE	-2 = HUMIDIFIER
PL1	12-CIRCUIT CONNECTOR
PL2	9-CIRCUIT CONNECTOR
PL3	3-CIRCUIT IDM CONNECTOR
PL6	2-CIRCUIT HSI CONNECTOR
SW1	HIGH-HEAT-ONLY SWITCH, SPST (MANUAL)*
SW2	LOW-HEAT-ONLY SWITCH, SPST (MANUAL)*
SW3 & 4	BLOWER-OFF DELAY SETTING SWITCHES,
	SPST (MANUAL)*
TJ	TWINNING JUMPER, SPDT FOR MAIN OR
	SECONDARY STATUS (MANUAL CHANGE OVER)
TRAN	TRANSFORMER-115VAC/24VAC
TWIN/TEST	1-CIRCUIT TWINNING BUSS CONNECTOR,
	ALSO STATUS CODE RECALL

JUNCTION

TERMINAL

CONTROL TERMINAL

	W2	CPU		HPS
		MGVR-1		P	HI
		1	M
	Y/Y2	10	C	GV
		NOTE#7
	G
		7		FSE
		8 N/A
	COM	11 N/A
NOTES:	SW4	SW3 SW2

HPSR	HIGH-HEAT PRESSURE SWITCH RELAY, SPST (N.C.)
HSI	HOT-SURFACE IGNITER (115 VAC)
HSIR	HOT-SURFACE IGNITOR RELAY, SPST (N.O.)
HUM	24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.)
IDM	INDUCED DRAFT MOTOR, 2-SPEED, SHADED-POLE
IDR	INDUCER MOTOR RELAY, SPST (N.O.)
IHI / LOR	INDUCER MOTOR SPEED CHANGE RELAY, SPDT
ILK	BLOWER DOOR INTERLOCK SWITCH, SPST (N.O.)
JB	JUNCTION BOX
LED	LIGHT-EMITTING DIODE FOR STATUS CODES
LGPS	LOW GAS-PRESSURE SWITCH, SPST (N.O.)
LPS	LOW-HEAT PRESSURE SWITCH, SPST (N.O.)
LS	LIMIT SWITCH, OVERTEMPERATURE-AUTO RESET, SPST (N.C.)

FACTORY POWER WIRING (115VAC)

FACTORY CONTROL WIRING (24VAC) FIELD POWER WIRING (115VAC)

FIELD CONTROL WIRING (24VAC) CONDUCTOR ON CONTROL FIELD WIRING SCREW TERMINAL FIELD GROUND

EQUIPMENT GROUND

FIELD SPLICE

PLUG RECEPTACLE

1.Use only copper wire between the disconnect switch and the unit.

2.If any of the original wire, as supplied, must be replaced, use the same or equivalent type wire.

3.Inducer (IDM) and blower (BLWM) motors contain internal auto-reset thermal overload switches.

4.Blower motor speed selections are for average conditions. See Installation Instructions for details on optimum speed selection.

5.Replace only with a 3-AMP fuse.

6.Auxiliary limit switches (ALS1 & 2) used on some horizontal and some downflow models.

7.This wire must be connected to furnace sheet metal for control to prove flame.

8.Factory connected when LGPS not used.

9.Symbols are an electrical representation only.

10.BLOWER-ON DELAY: Gas heating 45 seconds, Cooling/Heat Pump 2 seconds.

11.Cooling/Heat Pump BLOWER-OFF DELAY is 90 seconds.

12.IGNITION-LOCKOUT will occur after four consecutive unsuccessful trials-for-ignition. Control will automatically reset after three hours.

13.Control must be grounded at pin 10 of 12-pin connector.

14.NA - Not Applicable

15.Spare terminal and wire not available on some applications. Insulate connector if not available.

324459-101 REV. D

A01365

→Fig. 11—Unit Wiring Diagram