Precedent units may be equipped with factory mounted unit disconnect or main breaker. Both look identical, except they function differently. Many mistake a disconnect for a breaker due to the fact they are in the same case, but there are differences to look for for verification.
Unit Mounted Disconnect
Model Number Digit 19 = 1
The Unit Mounted Disconnect looks just like a breaker because it is in a breaker frame, except on the label of the disconnect actually states "Molded Case Switch" and the electrical symbol next to it also follows the standard indicating a switch or disconnect.
This is just simply a disconnect mounted inside the unit and offers no circuit protection. The rating on the handle indicates that this disconnect is capable of being installed on up to a 125 amp circuit.
Unit Mounted Circuit Breaker
Model Number Digit 19 = 2
The Unit Mounted Circuit Breaker is a breaker and will be rated accordingly for the units MOP rating. The look of the breaker is the same as a disconnect for the same reason, it is in a breaker frame. The labeling on the breaker will state that it is a Circuit Breaker and displays the electrical symbol for a breaker.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.