LG Electronics 395CAV installation instructions Pcb, → ÐUnit Wiring Diagram

A95335

322869-101 REV. C

FL is on upflow

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 detect flame.

6. Replace only with a 3 amp fuse.

7. Yellow lead not on all motors.

8. Blower-on delay, gas heating 45 seconds, cooling or heat pump 2 seconds.

9. Blower-off delay, gas heating 90, 135, 180 or 225 seconds, cooling or heat pump 90 seconds. (135 seconds only on some models)

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

11. When used auxiliary limit switch (ALS) is on downflow models only. When used models only.

12. Some models may have spade quick connect terminals.

FSE

Ð10Ð

(WHEN USED)

TO 115VAC FIELD DISCONNECT

SCHEMATIC DIAGRAM

SW2

G

NOTE #12

PRS

PCB

BLOWER

DSS

ALS

NEUTRAL

(NATURAL GAS & PROPANE)

R

NOTE #4

NOTE #9

OFF

Y

ORN

L1

EQUIPMENT GROUND

(NOT ON ALL MODELS)

DELAY

SW1

W

L2

ILK

C OM

YEL

LO

BLOWER OFF DELAY

HUM

SPARE-2

SELECTION CHART

TEST/TWIN

MED LO

HEAT

MED HI

90

SEC

LED

BLU

SPARE-1

HI

START

L1

HI/LO

OL

135 SEC

FRS1

FRS2

BLWR

COOL

NOTE #8

RED

CAP

1-M

3-P

180 SEC

COM

PL1

3

2

1

COM

BLWM

WHT

LS

GV

EAC-1

225 SEC

6

5

4

FSE

(WHEN USED)

FL

HSIR

9

8

7

RED

2-C

EAC-2

GVR

1

1

HSI

GRN

SEC-1

SEC-2

BLU

BLK

NOTE #5

PL2

2

PL5

2

IDM

TRAN

HI/LO

RED

WHT

IDR

RELAY

24 VAC-3A

WHT (COM)

PR1

115VAC

PR2

1

3

FU1

FUSE

BLK (HI)

GRN

TRAN

BRN

PL3

COOL

SPARE-1

OL

24VAC

HSIR

IDR

BLWR

BLOWER

YEL (MED HI)

2

SPEED

START

CAP

NOT USED

SELECT

NOTE #8

TEST/TWIN

FU1

NOTE #6

HEAT

SPARE-2

PL3

L2

EAC-1

AMP

BLU (MED LO)

BRN

SEC-1

SEC-2

FRS1

FRS2

NOTE #12

PL2

PR2

GVR-2

120

VAC

1

1.5

BLWM

HUM

7

1

RED

(LO)

2

EAC-2

(WHEN USED

FL

L1

PR1

COM

2

3

1

LS

R

WHT (COM)

WHT

W

WHT

BLK

4

PRS

WHT

BLK

BLK

BLK

FUSED DISCONNECT

HSIR

BLWR

HI/LO

PL1

PL5

ILK

JB

SWITCH (WHEN REQ'D)

IDR

GVR

NOTE #4

1

2

WHT

L1

ALS

BLK

FU2

3

DSS

IDM

(WHEN USED)

3-P

NOTE #11

BLK

WHT

NEUTRAL

HSI

GRN

GVR-1

2

GV

CPU

GRN

2-C

1-M

Y

8

NOTE #5

LEGEND

ALS	AUXILIARY LIMIT SWITCH, OVERTEMP. -MANUAL RESET, SPST-(N.C.)
BLWR	BLOWER MOTOR RELAY, SPST-(N.O.)
BLWM	BLOWER MOTOR
CAP	CAPACITOR
CPU	MICROPROCESSOR AND CIRCUITRY
DSS	DRAFT SAFEGUARD SWITCH
EAC-1	ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)
EAC-2	ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FL	FUSIBLE LINK
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)
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
PL5	2-CIRCUIT HSI/PCB CONNECTOR
PRS	PRESSURE SWITCH, SPST-(N.O.)
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 GROUND
	EQUIPMENT GROUND
	FIELD SPLICE
	PLUG RECEPTACLE

G

COM

NOTES:

5

6

9

NOT USED NOT USED

→Fig. 11ÐUnit Wiring Diagram