LG W06LC Owner's Manual page 14

Circuit Breaker Installation and Parts for Installation
Read thoroughly and follow all directions provided.
A circuit breaker must be installed between the power source and the unit if the plug is not used
(see illustration below).
Main Power source
Circuit Breaker
Use a circuit breaker
or time delay fuse.
Note : Use 20A circuit breaker for
21K~26K Btu/h Models.
(For some models)
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