20
AGL_Unit_LOCU_EN_Rev00
2.13 Parameters level 1
– Required settings
The XCM25D is preconfigured to reduce the required settings on job -site to a minimum. In most
cases it will not be necessary to enter programming level 2
"Pr2"
.
Table 17
gives an overview of the
parameters available in programming level 1
"Pr1"
.
Code Description
Range
Factory settings
OMTE
OLE
OLTE
C01
Compressor cut-in pressure
setpoint
C02 to C04
-
1
-
C02
Compressor cut-out
pressure setpoint
C03 to C01
-
0.5
-
C07
Refrigerant selection for
regulation
R404A (0) - R134A (2)
R407A (5) - R407F (6)
R448A (7) - R449A (8)
8-R449A
C16
Digital compressor setpoint
C03 to C04
2.6
-
1.0
C17
Proportional band for
compressor regulation
0.1 to 9.9 bar*;
0.1 to 99.9 PSI;
0.1 to 25.5 °C
2.0
-
1.0
C21
Cycle time for digital
compressor
10 to 40 sec
10
-
10**
C24
Minimum capacity for digital
compressor
0 to C25 %
10
-
10***
E62
Maximum fan motor speed
30 to 100 %
85
80
80
E66
Delta temperature
condenser floating setpoint
0.0 to 25.5 °C
8
8
8
T18
Access to Pr2 level
(0÷999)
3 2 1
* Pressure values are always relative
** 20 sec for OLTE-82D
*** 30 % for OLTE-82D
Table 17: Parameters in programming level Pr1
NOTE: The cycle time of the digital compressor (C21) must not be reduced below 20 seconds
and the minimum capacity of the digital compressor (C24) must not be reduced below 30 %
for OLTE-82D.
NOTE: The full list of parameters in programming level "Pr2" can be found in Technical
Information TI_Unit_LOCU_01_EN "
Copeland™ LOCU refrigeration units – XCM25D
Controller Parameter List".
2.14 Digital operation
A digital unit is able to operate in a part-load mode. Part-load operation is achieved by loading and
unloading of the digital scroll compressor f or certain periods of time (time cycles). The cycle of time
can be chosen between 10 and 30 seconds. Example: if the time cycle is 20 seconds at 50 % of
capacity request, the compressor will run f or 10 seconds loaded and 10 seconds unloaded. For
proper commissioning of the digital unit the diagram in
Figure 19
must be considered.
Figure 19: Digital operation
Summary of Contents for Copeland OLE-49
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