A19 temperature controls without enclosure are designed for you to install in units that already include a case or enclosure. They cover a broad range of general purpose operating temperature control applications in the refrigeration, air conditioning, and heating fields. Models are available with open on rise action, close on rise action, or single-pole, double-throw (SPDT) action.
Figure 1. A19 temperature control without enclosure
Important: Use the A19 control only as an operating control. Where failure or malfunction of the control could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the control.