Bryant 350MAV user manual Pcb

—12—

A02157

BLOWER OFF DELAY			(WHEN USED)
	PCB	PRS	LGPS
JUMPER SELECT

PRINTED

Y1

90

120

ORN

DHUM

CIRCIUT

G

150

180

BLU

NOTE #11

24V

BLU

YEL

Com

BOARD

W

J1

M

GV

Y/Y2

RED

RED

TEST/TWIN

ORN

FRS

R

LS

C GRN/YEL

HUM

FU1

RED

NOTE #3

NOTE #6

981011

GRN/YEL

LED 1

WHT

RED

TRAN

SEC-2

SEC-1

BLU

BLK

EAC-2

L2

7

WHT

RED

WHT

NOTE#8

4325 6

RED

WHT

NEUTRAL

PL4

CAP -2

GRN/YEL

YEL

GRN/YEL

BRN

BRN

BLW

1

WHT

FSE

3

WHT

M

PL1

GRN/YEL

AUX

2

PL2

IDM

OL

1

BHT/CLR

BFANR

BLWR

2

1

BLK

WHT

COOL

L1

PL3

HEAT

FAN

BLK

WHT

2

HSI

BLK

BLK

1

SPARE 1

SPARE 2

EAC-1

PR1

WHT

BLK (HI)

WHT

(COM)

WHT

(COM)

BLK

BLWM

FUSED OR CIRCUIT BREAKER

GRN/YEL

YEL

JB

DISCONNECT SWITCH (WHEN REQ’D)

(MED HI)

BRN

NOTE #2

OL

WHT

WHT

NEUTRAL

FU2

NOTE #10

START

CAP -1

BLK

L1

BLK

BLU

RED (LO)

ILK

BRN

GND

(MED LO)

L

BFANR

CONTINUOUS-FAN SELECT RELAY, SPDT

OL

AUTO-RESET INTERNAL MOTOR OVERLOAD

E

BHT/CLR

BLOWER MOTOR SPEED CHANGE RELAY, SPDT

TEMPERATURE SWITCH (N.C.)

BLWR

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

PCB

PRINTED CIRCUIT BOARD CONTROL

G BLWM

BLOWER MOTOR, PERMANENT-SPLIT-CAPACITOR

PL1

11-CIRCUIT PCB CONNECTOR

E

CAP 1, 2

CAPACITOR

PL2

2-CIRCUIT CONNECTOR

CPU

MICROPROCESSOR AND CIRCUITRY

PL3

2-CIRCUIT HSI, CONNECTOR

N EAC-1

ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.0 AMP MAX.)

PL4

3-CIRCUIT IDM EXTENSION CONNECTOR

D EAC-2

ELECTRONIC AIR CLEANER CONNECTION (COMMON)

PRS

PRESSURE SWITCH, SPST-(N.O.)

FRS

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

TEST/TWIN

COMPONENT TEST & TWIN TERMINAL

FSE

FLAME-PROVING ELECTRODE

TRAN

TRANSFORMER-115VAC/24VAC

FU 1

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

JUNCTION

FU 2

FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE

GND

(FIELD INSTALLED & SUPPLIED)

UNMARKED TERMINAL

EQUIPMENT GROUND

PCB CONTROL TERMINAL

GV

GAS VALVE-REDUNDANT

FACTORY WIRING (115VAC)

GVR 1, 2

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

HSI

HOT SURFACE IGNITER (115 VAC)

FACTORY WIRING (24VAC)

HSIR

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

FIELD WIRING (115VAC)

HUM

24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.)

FIELD WIRING (24VAC)

IDM

INDUCED DRAFT MOTOR, PSC

IDR

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

CONDUCTOR ON CONTROL PCB

ILK

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

FIELD WIRING SCREW TERMINAL

J1

BLOWER - OFF DELAY JUMPER SELECTOR

FIELD EARTH GROUND

JB

JUNCTION BOX

LED

LIGHT-EMITTING DIODE FOR STATUS CODES - AMBER

EQUIPMENT GROUND

LGPS

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

FIELD SPLICE

LS

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

PLUG RECEPTACLE

TO 115VAC FIELD DISCONNECT			SCHEMATIC DIAGRAM
NOTE #2		L2	(NATURAL GAS & PROPANE)
	L1	GND	EQUIPMENT GROUND

ILK				FAN			LO			CAP-1
				HEAT		MED LO
						MED HI
L1
		FAN		SPARE-1		HI		START
					NOTE #10					L2
BLWR		HI/LO						OL
				COOL						EAC-2
									BLWM
							COM
	EAC-1
		HSIR
IDR			1			1	HSI
									IDM
		PL2	2	PL3		2
									OL
PR1		115VAC						M	AUX
TRAN
		24VAC						1
TEST/TWIN							PL4	3
								2	CAP - 2
F U 1	NOTE #6
		SEC-1		SEC-2			6		FRS	LS
		GVR-2

	HUM			8
	R
					LGPS	(WHEN USED)
				2
PRINTED	W
				PL1	NOTE #11
CIRCIUT					PRS
BOARD				4
	Y/Y2		GVR-1	10	M	GV
			CPU
	DHUM			5		C
						NOTE #3
	Y1
	G			1
				9	FSE
	COM	PCB		7
				3

NOTE #5 11

NOTES:

1.If any of the original equipment wire is replaced use wire rated for 105° C.

2.Use only copper wire between the disconnect switch and the furnace junction box (JB).

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

4.Symbols are electrical representation only.

5.Solid lines inside PCB are printed circuit board conductors and are not included in legend.

6.Replace only with a 3 amp fuse.

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

8.Neutral connections are interchangeable within the NEUTRAL connector block.

9.Blower motor speed selections are for average conditions, see installation instructions for details on optimum speed selection.

10.YELLOW lead not on all motors.

11.Factory connected when LGPS is not used.

12.Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control will auto-reset after three hours.

13.Blower-on delay: gas heating 60 seconds, cooling or heat pump 2 seconds.

14.Blower-off delay: gas heating selections are 90, 120, 150 or 180 seconds, cooling or heat pump 90 seconds or 5 seconds when dehumidify call is active.

326796-101 REV. A

Fig. 16—Wiring Diagram A02157