Adaptive defrost setup parameters - PENN Controls - LIT-12013106 - MR534AFDN - MR534AFDV - Electronic Refrigeration, Defrost, and Multi-Purpose Controller - MR5xx Panel‐Mount Refrigeration and Defrost Controller

MR5 Series Panel Mount Case Controller Product Bulletin
Product name
MR5xx Panel‐Mount Refrigeration and Defrost Controller
Document type
Product Bulletin
Document number
LIT-12013106
Revision date
2019-10-08
Product status
Discontinued

The MR5 Controller includes the following adaptive defrost setup parameters:

  • The expected defrost duration is the estimated duration for a complete defrost of the evaporator coil and how long it takes for the evaporator to reach the defrost termination temperature after a typical defrost interval. During the set up of the adaptive defrost, select from 0 minutes to 99 minutes for the expected defrost duration.

  • The defrost interval is the interval in hours between the start of consecutive defrost cycles. You can define the initial defrost interval when you set up the adaptive defrost feature, and the adaptive defrost feature shortens or lengthens the defrost interval to adapt to the required interval. Select from 1 hour to 48 hours for the initial defrost interval.
  • Maximum time between defrosts defines the maximum hours for any adaptive defrost interval. If the system calculates a defrost interval greater than the maximum time that you set, the MR5 Controller ignores the calculation and starts the next defrost duration based on the maximum time. Select from 3 hours to 24 hours for the maximum time between defrosts.
  • Minimum Time Between Defrosts defines the minimum hours for any adaptive defrost interval. If the system calculates a defrost interval that is less than the minimum time that you set, the MR5 Controller ignores the calculation and starts the next defrost duration based on the minimum time. Select from 3 hours to 24 hours for the minimum time between defrosts.
  • Blackout periods prevent the occurrence of defrost cycles during the defined blackout period. You can schedule daily blackout periods during regular, predictable periods of high cooling demand. Select from 0 minutes to 240 minutes for a blackout period.