
pRack +040000071 rel. 1.1 - 14.10.2011
11
ENG
2.1 Pre-confi guration 1: RS2
C1
NO1
B5/ID3
T suct
B3
NO2
B6/ID4
C2
F1
NO3
NO4
F2
NO5
T dis
B4
B7/ID5
Psuct
B1
Fig. 2.a
Description
2 reciprocating/ scroll compressors
2 fans
1 generic alarm for each compressor
1 generic alarm for condensers
HP/LP pressostats
pRack compact, PRK100X**
I/O list
Digital outputs
pRack PR100 Compact
pRack PR100 S, M, L, XL
NO1
NO1
Compressor 1
NO2
NO2
Compressor 2
NO3
NO3
Fan 1
NO4
NO4
Fan 2
NO5
NO5
Alarms output
Digital inputs
ID1
ID1
Suction HP pressostat
ID2
ID2
Suction LP pressostat
B5
ID3
Generic compressor 1 alarm
B6
ID4
Generic compressor 2 alarm
B7
ID5
Generic condenser alarm
Analog inputs
B1
B1
Suction pressure probe
4...20 mA
-0.5
..7.0 barg
B3
B3
Suction temperature probe
NTC
B4
B4
Discharge temperature probe
HTNTC
Tab. 2.b
Main parameters
Parameter
Mask index
Value
Suction regulation by
Cab01
PRESSURE
Suction regulation type
Cab01
NEUTRAL ZONE
Suction setpoint
Cab03
3.5,barg
Suction diff erential
Cab08
0.3 barg
Compressors rotation type
Caf10
FIFO
Refrigerant
Caf04
R404A
High suction pressure alarm threshold
Cae24
6.0 barg
Low suction pressure alarm threshold
Cae26
0.0 barg
Condenser regulation by
Dab01
TEMPERATURE
Condenser regulation type
Dab01
PROPORTIONAL BAND
Condenser setpoint
Dab03
30.0 °C
Condenser diff erential
Dab09
2.0 °C
High condenser pressure alarm threshold
Dae01
55.0 °C
Low condenser pressure alarm threshold
Dae03
5.0 °C
Tab. 2.c