Manually starting and stopping a Defrost Cycle (SdF) - PENN Controls - A421ABD - A421AED - Electronic Temperature Control - A421 Series Electronic Temperature Control

A421 Series Electronic Temperature Controls with Off-Cycle Defrost Installation Guide
Product
Controls > Electromechanical Temperature Controls > A421 Series Electronic Temperature Control
Document type
Installation Guide
Document revision
E
Revision date
2022-08-25
Part number
24-7664-3035

About this task

In this task you manually Start/Stop a Defrost Cycle (SdF).

Procedure

  1. Select a Defrost Interval (dI) value of 0.
  2. Select a dFt value between 1 minute and 99 minutes.
  3. Select an SdF parameter value of 1 during normal On/Off operation to start a defrost cycle.
    • Or, change the SdF value to 0 during a defrost cycle and return to normal On/Off operation. See the figure below.
    Figure 1. Manual Defrost only: behavior when dI is set to 0