Applications - PENN Controls - LIT-12011972 - A421ABC - A421ABG - A421ABJ - A421AEC - A421AEJ - A421GBF - A421GEF - Electronic Temperature Control - A421 Standard Model

A421 Series Standard Electronic Temperature Controls with and without Power Cords Product Bulletin
Brand
PENN Controls
Product name
A421 Standard Model
Document type
Product Bulletin
Document number
LIT-12011972
Revision date
2023-01-09
Language
English
Important: Use this A421 Series Electronic Temperature Control only as an operating control. Where failure or malfunction of the A421 Series 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 A421 Series Control.

You can use the A421 Control to manage a wide range of single-stage refrigeration or HVAC equipment. See Table 1 for application information by control type. Sample temperature control applications include the following:

  • Temperature monitoring and alarming
  • On and off control of boilers and chillers
  • Boiler and chiller pump control
  • Heating or cooling control
  • Cooling tower fan control based on water temperature
  • Supply, makeup, and mixed air temperature control
  • Temperature actuated valve control
  • Supply and makeup air damper and fan control
  • Condenser fan control based on condenser temperature
Table 1. Applications by A421 control type
Control type Application family Wholesale Agricultural Beverage Chillers Data center Economizer Food service HVAC Ice machines Process Refrigeration Signage Space heating Transportation Ventilation
A421ABC Standard X X X X X X X X X X X X X X X
A421ABG Power cord1   X X       X   X X X   X   X
A421ABJ Power cord2   X X       X   X X X   X   X
A421AEC Standard X X X X X X X X X X X X X X X
A421AEJ Power cord2   X X       X   X X X   X   X
A421GBF Standard X X X X X X X X X X X X X X X
A421GEF Standard X X X X X X X X X X X X X X X
1 This type features two power cords, with male and female outlets on separate cords. Standard heating applications include salamander and torpedo heaters, and other portable, plug-in heating equipment in construction and agriculture applications. Typical cooling applications include controlling home freezers and refrigerators for home brewing, fermentation, and product storage applications.
2 This type features a single power cord, with male and female outlets on the same cord.