Applications - PENN Controls - A19CAC - Electromechanical Temperature Control - A19 Control for Hot Water Immersion

A19CAC Type Automatic Changeover Control Installation Guide

Product
Controls > Hot Water Controls > A19 Control for Hot Water Immersion
Document type
Installation Guide
Document revision
J
Revision date
2023-10-18
docpartnumberlabel
Part No.
Part number
997-361

Use the A19CAC changeover control with a wall type, single-pole, double-throw (SPDT) heating and cooling temperature control to automatically select either the heating or cooling mode of a convector or fan coil type system. The maximum ambient temperature is 131°F (55°C).

Figure 1. A19 changeover control

The automatic changeover control eliminates the need for manual selector switches at the temperature control. The control automatically switches to the cooling position when the water temperature decreases to the setpoint, and it switches to the heating position when the water temperature increases to setpoint plus differential. The switch is SPDT, and color-coded for easy wiring.

Important: Use this 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.