Applications - PENN Controls - LIT-1927110 - A28AA - A28AB - A28AJ - Electromechanical Temperature Control - A28 Series Two-Stage Temperature Control

A28AA, A28AB, and A28AJ Series Two-Stage Temperature Control Catalog Page
Product
Controls > Electromechanical Temperature Controls > A28 Series Two-Stage Temperature Control
Document type
Catalog Page
Document number
LIT-1927110
Revision date
07/03/2024

Use the controls for temperature sensing applications that need two-stage control of HVAC/R equipment.

Figure 1. A28 Series SPDT switch action

Note: On the low stage terminal, on a temperature increase above the low stage set point, the circuit from red to blue (RB) opens, and simultaneously red to yellow (RY) closes. A similar action occurs on the high stage terminal on a temperature increase above the high stage set point.