Bryant 340MAV instruction manual WiringDiagram

—21—

BLOWER OFF DELAY

(WHEN USED)

TO 115VAC FIELD DISCONNECT

SCHEMATIC DIAGRAM

PCB

PRS

LGPS

(NATURAL GAS & PROPANE)

JUMPER SELECT

L1

L2

NOTE #2

GND

EQUIPMENT GROUND

PRINTED

J2

90

120

ORN

SPARE-2

MED LO

ILK

LO

CAP-1

CIRCIUT

G

150

NOTE #11

HEAT

MED HI

Com

YEL

L1

HI/LO

L2

180

SPARE-1

HI

24V

BLU

BLU

OL

START

BOARD

W

J1

M

GV

BLWR

COOL NOTE #10

EAC-2

ORN

LS

FRS

C

COM

Y

TEST/TWIN

RED

RED

BLWM

R

HUM

GRN/YEL

EAC-1

HSIR

FU1

RED

NOTE #3

NOTE #6

GRN/YEL

IDR

1

1

HSI

101198

IDM

LED 1

RED

TRAN

AUX

SEC-2

SEC-1

WHT

PL2

2

PL3

2

OL

BLU

BLK

PR1

115VAC

M

RED

EAC-2

L2

7

WHT

WHT

TRAN

NOTE#8

432 5 6

RED

WHT

NEUTRAL

PL4

2

CAP - 2

YEL

GRN/YEL

CAP -2

24VAC

1

GRN/YEL

BRN

BRN

TEST/TWIN

PL4

3

BLW

1

WHT

3

WHT

AUX

F U 1 NOTE #6

PL1

FSE

M

GRN/YEL

PL2

2

IDM

PRINTED

COOL

L1

PL3

OL

SEC-1

SEC-2

FRS

LS

1

6

BHT/CLR

BLWR

BLK

2

1

WHT

SPARE 1

SPARE 2

EAC-1

BLK

WHT

2

HSI

CIRCIUT

LGPS

(WHEN USED)

HEAT

BLK

8

BLK

1

R

PR1

BOARD

W

2

WHT

BLK (HI)

WHT

(COM)

WHT

HUM

PL1

NOTE #11

(COM)

BLK

PRS

BLWM

FUSED OR CIRCUIT BREAKER

GRN/YEL

YEL

JB

DISCONNECT SWITCH (WHEN REQ’D)

NOTE #2

(MED HI)

BRN

OL

4

WHT

WHT

NEUTRAL

FU2

NOTE #10

START

CAP -1

GVR-1

10

GV

BLK

L1

M

RED (LO)

BLK

BLU

ILK

CPU

BRN

GND

Y

5

C

(MED LO)

NOTE #3

L

BHT/CLR

BLOWER MOTOR SPEED CHANGE RELAY, SPDT

OL

AUTO-RESET INTERNAL MOTOR OVERLOAD

G

1

TEMPERATURE SWITCH (N.C.)

E BLWR

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

PCB

PRINTED CIRCUIT BOARD CONTROL

9

FSE

G

BLWM

BLOWER MOTOR, PERMANENT-SPLIT-CAPACITOR

PL1

11-CIRCUIT PCB CONNECTOR

CAP 1,2

CAPACITOR

E CPU

MICROPROCESSOR AND CIRCUITRY

PL2

2-CIRCUIT CONNECTOR

COM

7

N EAC-1

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

PL3

2-CIRCUIT HSI, CONNECTOR

PCB

3

PL4

3-CIRCUIT IDM EXTENSION CONNECTOR

24V

D

EAC-2

ELECTRONIC AIR CLEANER CONNECTION (COMMON)

NOTE #5

PRS

PRESSURE SWITCH, SPST-(N.O.)

11

FRS

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

NOTES:

FSE

FLAME-PROVING ELECTRODE

TEST/TWIN

COMPONENT TEST & TWIN TERMINAL

FU 1

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

TRAN

TRANSFORMER-115VAC/24VAC

1.

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

FU 2

FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE

JUNCTION

2.

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

(FIELD INSTALLED & SUPPLIED)

UNMARKED TERMINAL

3.

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

GND

EQUIPMENT GROUND

4.

Symbols are electrical representation only.

GV

GAS VALVE-REDUNDANT

PCB CONTROL TERMINAL

5.

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

GVR 1, 2

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

FACTORY WIRING (115VAC)

6.

Replace only with a 3 amp fuse.

HSI

HOT SURFACE IGNITER (115 VAC)

FACTORY WIRING (24VAC)

7.

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

HSIR

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

8.

Neutral connections are interchangeable within the NEUTRAL connector block.

HUM

24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.)

FIELD WIRING (115VAC)

9.

Blower motor speed selections are for average conditions, see installation instructions for details on

IDM

INDUCED DRAFT MOTOR, PSC

FIELD WIRING (24VAC)

optimum speed selection.

IDR

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

CONDUCTOR ON CONTROL PCB

10. YELLOW lead not on all motors.

ILK

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

11. Factory connected when LGPS is not used.

J1

BLOWER - OFF DELAY JUMPER SELECTOR

FIELD WIRING SCREW TERMINAL

12. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control will

J2

COOLING - OFF DELAY JUMPER

FIELD EARTH GROUND

auto-reset after three hours.

JB

JUNCTION BOX

EQUIPMENT GROUND

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

LED

LIGHT-EMITTING DIODE FOR STATUS CODES - RED

14. Blower-off delay: gas heating selections are 90, 120, 150 or 180 seconds, cooling or heat pump

LGPS

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

FIELD SPLICE

90 seconds or 5 seconds when J2 is cut.

LS

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

PLUG RECEPTACLE

328150-101 REV. A

Fig. 30—Wiring Diagram A02271