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Electrical connection / diagram, Electrical connection and ladder diagram, Warning: this heater may start at any time – L.B. White AD250(Spark Ignition) User Manual

Page 26: Caution, Dsi contr ol, Motor

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CAUTION

Always refer to the heater’s electrical connection diagram when servicing to avoid wiring errors and heater malfunction.

Check for proper operation after servicing.

25

Electrical Connection and Ladder Diagram

WARNING: THIS HEATER MAY START AT ANY TIME

GROUND

POWER CORD

AIR PROVING
SWITCH

FAN
MOTOR

OPTIONAL
THERMOSTAT

IGNITER
FLAME SENSOR

GAS CONTROL VALVE

HIGH LIMIT
SWITCH(ES)

TRANSFORMER

GREEN

WHITE

BLACK

YELLO

W

BROWN

BLUE

BLUE

WHITE

BROWN

BR

O

W

N

GREEN

BLA

CK

WHITE

WHITE

BLACK

WHITE

BLACK

GREEN

BLUE

BLUE

BLACK

BLACK

GREEN
GREEN

YELLOW

BROWN

WHITE

LI

IND

L.E.D.

MV

PS2

PS1

W

FS

C

COM

DSI CONTR

OL

GROUND

HIGH VOLTAGE
IGNITION LEAD

HEAT CHAMBER
OR
BURNER GROUND

ELECTRICAL CONNECTION DIAGRAM

ELECTRICAL LADDER DIAGRAM

120 V

24 V

NEUTRAL

HIGH LIMIT
SWITCH(ES)

SOLENOID(S)

FLAME SENSOR

TRANSFORMER

AIR PROVING SWITCH

IGNITER

DSI CONTR

OL

THERMOSTAT

GROUND

GROUND

IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE HEATER MUST BE REPLACED, IT MUST
BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF AT LEAST 302 F (150 C)

LI

IND

L.E.D.

MV

PS2

PS1

W

FS

C

COM

LI

MOTOR