Lockwood H-HEAT UNIT-EXT-6 Manual Download Page 4

WIRING DIAGRAM

11/2019 wra

120v White

120v Black

Chassis 

Ground

Off

On

Power

Indicator

Hold

Proof

Proof

Indicator

Hold

Indicator

1000 Watt 

Immersible

Water Pan 

Element

Humidity

Control

Thermostat

Control

Thermometer

(except 

INT model)

Terminal

Block

Thermometer

Transformer

(except –INT model)

Blower

1000 Watt 

Heat Element

500 Watt Heat 

Element

120 volt AC

(White Wire)

(Black Wire)

12 volt DC

(Yellow Wires)

HEAT UNIT WIRE DIAGRAM

For Models:

H-HEAT UNIT-

EXT

* H-HEAT UNIT-

EXT-6

* H-HEAT UNIT-

74

* H-HEAT UNIT-

INT

Manufactured after 12/01/2016

Revised 12/01/2016

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