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Summary Table of Operating Parameters
CAREL® ir33 PLATFORM PROGRAMMABLE CONTROLLER FOR REFRIGERATED UNITS - PAGE 3 of 3
Integrated Electronic
Microprocessor Controller
CODE
PARAMETER
UOM* TYPE MINIMUM MAXIMUM
DEFAULT
/5
Select Celsius (°C) or Fahrenheit (°F)
flag
C
0
1
/c1
Calibration of probe 1
°C/°F
C
-20
20
/c2
Calibration of probe 2
°C/°F
C
-20
20
St
Temperature set point
°C/°F
F
r2
r1
rd
Control delta
°C/°F
F
20
0.1
dl
Interval between defrosts
hours
F
0
250
d4
Defrost activated when instrument is
switched on**
-
-
0
1
dt1
End defrost temperature, evaporator
°C/°F
F
-50
200
dP1
Maximum defrost duration, evaporator
min
F
1
250
d6
Display on hold during defrost
-
C
0
2
dd
Dripping time after defrost
min
F
0
15
d/1
Display of defrost probe 1
°C/°F
F
-
-
For Case
Specific
Defaults
See Serial
Label
Located
Near
Electrical
Access
On Your
Case.
For
Additional
Technical
Information
Call
Structural
Concepts
Technical
Service
Dept. at
1(800)
433.9490
Ext. 1
* Unit Of Measure
** Case will go into defrost ONLY when case is turned off and
then back on when probe is reading below 45 °F.
This data derived from Carel® Controller Material:
ir33 +030220441 - rel. 2.0 - 01.05.2006.
User Manuals\Carel ir33 Platform Programmable Controller For
Refrig Units - Rev C Date: 06/22/2022
