µRack
Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12
28
Parameter
Type Pos. Display Description
UOM
Range
Default
Notes
Unit model
R/W C /01
Set the unit model (without capacity control):
SINGLE CIRCUIT
0) 0 compressors
1) 1compressor
2) 2 compressors
3) 3 compressors
4) 4 compressors
TWO CIRCUIT
5) 1 comp 1 compressor
6) 2 compr 1 compressor
7) 3 compr 1 compressor
8) 2 compr 2 compressors
Set the unit model (with capacity control):
SINGLE CIRCUIT
9) 1 compressor 1 capacity control
10) 1compressor 2 capacity control
11) 1 compressor 3 parzializzazioni
TWO CIRCUIT
12) 1 compressor 1 capacity c 1 compressor
13) 1 compressor 1 capacity c 1 compressor 1 capacity control
14) 1 compressor 2 capacity c 1 compressor
0 to 8
2
Compressors with different
capacities
R/W C /02
Enable management of compressors with different capacities
0) NOT ENABLED
1) ENABLED
0/1 0
For single circuit only
for the configuration
/01=1,2,3 e 4
Capacity compressor 1
R/W C
/03 Capacity of compressor 1
kW
0 to 999
5
Only if comp. with
different capacities are
enabled
Capacity compressor 2
R/W C
/04 Capacity of compressor 2
kW
/03 to 999
10
Only if comp. with
different capacities are
enabled
Capacity compressor 3
R/W C
/05 Capacity of compressor 3
kW
/03+/04 to
999
20
Only if comp. with
different capacities are
enabled
Capacity compressor 4
R/W C
/06 Capacity of compressor 4
kW
/03+/04+/05
to 999
40
Only if comp. with
different capacities are
enabled
Number of compressors ON
with suction probe 1 fault
R/W C /07
If the suction 1 probe fault or not connected alarm is activated, this number
of compressors are started. These are in any case managed by the individual
alarms and general pressure switches.
0 to 4
0
Number limited by the
number of compressors
Number of compressors ON
with suction probe 2 fault
R/W C /08
If the suction 2 probe fault or not connected alarm is activated, this number
of compressors are started. These are in any case managed by the individual
alarms and general pressure switches.
0 to 4
0
For two circuits only
Configure number of fans
R/W C
/09 Set the number of fans
0 to 4
2
Number limited by the
number of compressors
already enabled
Enable fan inverter
R/W C
/10 Enable control of the fans with inverter
0/1
0
Display inverter output value
R
U
/11 Display the inverter output as a percentage
0 to 100%
0
Number of fans ON with
probe fault:
R/W C /12
If the discharge probe fault or not connected alarm is activated, this number
of fans are started. These are in any case managed by the individual alarms
and general pressure switches..
0 to 4
0
Enable fans with compressors
ON
R/W C /13
0= independent operation of the fans
1= fans on only when at least one compressor is ON
0/1 0
Digital input logic: N.O. =No
alarm
R/W C /14
Set the logic of the digital inputs.
0) N.O.: with no alarm the contact is open
1) N.C. : with no alarm the contact is closed
0/1
1
NO / NC
Multifunction input
configuration
R/W C /15
Set the type of multifunction input:
0: no function
1) unit ON-OFF (NC contact ON)
2) change set point (set1- set2)
3) general high pressure switch NC
4) general high pressure switch NO
5) general low pressure switch 1 NC
6) general low pressure switch 1 NO
7) general low pressure switch 2 NC
8) general low pressure switch 2 NO
9) liquid level alarm NC
10) liquid level alarm NO
11) general fan thermal overload NC
12) general fan thermal overload NO
0 to 12
0
If the 4 outputs are
used, this parameter is
ignored and the
Multifunction Input is
set as fan thermal
overload
B1 probe type
R/W C /16
B1 probe set:
0) probe not connected
1) NTC probe
2) 0 to 5 V probe
0 to 2
2
MIN suction pressure
R/W C
/17 Set the minimum value of suction probe
bar
-1.0 to /19 -1.0
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