A52x Series Electronic Refrigeration Controller with Adaptive Defrost Technical Bulletin
43
Enter the real-time value at which the first defrost cycle begins. To
save the value, press
SET.
Note:
If
AUTO
is selected in the
DEFROST SCHEDULE
screen,
only the start time of the first interval is selected. The
remaining defrost cycles per day are automatically
scheduled to start at equal time intervals after the first
defrost.
Real-time value
To set a second defrost time in the
SECOND DEFROST TIME
screen, press
SET
.
No selection
Enter the real-time value at which the second, third, fourth and so
on defrost cycle begins. Press
SET
to save the value.
Note:
If you select
MAN/UAL
in the
DEFROST SCHEDULE
screen, you must manually schedule each remaining
defrost cycle at a real-time value during a 24 hour period.
Select up to eight defrost cycles in a 24 hour period.
Real-time value
Adaptive Defrost Setup Screens
To enable and set up Adaptive Defrost, select
ADAPTI
(Adaptive)
in the
DEFROST
SCHEDULE
TYPE
screen and press
SET
.
ADAPTI
or
SCHEDU
To go to the
DEFROST
INTERVAL
screen to set the initial defrost
interval, press
SET
.
No selection
To set the initial defrost interval, select the defrost interval value
and press
SET.
The defrost interval value range is
1
to
48.
Note:
The Defrost Interval is the time in hours from the start of a
defrost cycle to the start of the next defrost cycle. This
time period is an estimate only. The Adaptive Defrost
feature continually adjusts over time to achieve the
expected defrost duration value.
1
to
48
To go to the
EXPECTED
DEFROST
DURATION
screen to set the
expected defrost duration, press
SET
.
No selection
To set the expected defrost duration, select the defrost
duration value and press
SET
. The expected defrost duration
value range is
1
to
99
minutes.
Note:
The expected defrost duration is an estimate of the time
required to clear the evaporator of all accumulated ice.
The evaporator or refrigeration system manufacturer may
provide some guidance about the most appropriate
defrost duration for your system.
1
to
99
minutes
Table 8: A52x Controller Set Up Screens, Descriptions, Behaviors, Value Ranges a Selection Lists (Part
12 of 19)
Screen Name in
Message Field
Parameter Description, Behavior, User Action
Value Range or
Selection List
Default
Value or
Selection
FIRST DEFROST
TIME
12:00PM
SET
SECOND
DEFROST TIME
SET
SECOND
DEFROST TIME
4:00 PM
DEFROST
SCHEDULE
TYPE
ADA
PTI
DEFROST
INTERVAL
SET
DEFROST
INTERVAL
MIN
8
EXPECTED
DEFROST
DURATION
SET
EXPECTED
DEFROST
DURATION
30
MIN
