Setup and adjustments - PENN Controls - A421ABC - A421AEC - A421GBF - A421GEF - Electronic Temperature Control - A421 Standard Model

A421 Series Standard Electronic Temperature Controls Installation Guide

Brand
PENN Controls
Product name
A421 Standard Model
Document type
Installation Guide
Part number
24-7664-3019
Document revision
G
Revision date
2022-08-25
Language
English

The front panel of the A421 Series Electronic Temperature Control has an LCD and a three-button UI (Figure 1).

Figure 1. A421 Control front panel with LCD and three-button UI

Table 1. A421 Control front panel with LCD and three-button UI
Callout Description
1 Liquid crystal display
2 Binary input indicator
3 Temperature units indicator
4 Operating mode indicator. You can use the indicator to heat or cool.
5 Up tab
6 Relay status
7 Down tab
8 Menu tab