Off-cycle defrost control - PENN Controls - LIT-12012219 - A421ABD - A421AED - Electronic Temperature Control - A421 Off‐Cycle Defrost Models

A421 Series Electronic Temperature Controls with Off-Cycle Defrost Product Bulletin
Brand
PENN Controls
Product name
A421 Off‐Cycle Defrost Models
Document type
Product Bulletin
Document number
LIT-12012219
Revision date
2023-03-07
Language
English

Use the A421 Control with Off-Cycle Defrost to set up regular, passive defrost periods of 1 minute to 99 minutes. The defrost interval can range from 2 hours to 24 hours, or you can set it to 0 for no defrost interval. You can also start or stop a defrost cycle in two ways: you can use the three-button touchpad on the advanced menu or connect a momentary switch to the binary input (BIN). See Figure 1 through Figure 3.