Carel pRack PR100 User manual

Integrated Control Solutions & Energy Savings
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
pRack PR100
Quick guide
compressor rack controller
LEIA E CONSERVE
ESTAS INSTRUÇÕES
READ AND SAVE
THESE INSTRUCTIONS

pRack +040000071 rel. 1.1 - 14.10.2011
3
ENG
IMPORTANT
CAREL bases the development of its products on decades of experience
in HVAC, on the continuous investments in technological innovations
to products, procedures and strict quality processes with in-circuit
and functional testing on 100% of its products, and on the most
innovative production technology available on the market. CAREL and
its subsidiaries nonetheless cannot guarantee that all the aspects of
the product and the software included with the product respond to
the requirements of the final application, despite the product being
developed according to start-of-the-art techniques. The customer
(manufacturer, developer or installer of the final equipment) accepts
all liability and risk relating to the configuration of the product in order
to reach the expected results in relation to the specific final installation
and/or equipment. CAREL may, based on specific agreements, act as a
consultant for the positive commissioning of the final unit/application,
however in no case does it accept liability for the correct operation of
the final equipment/system.
The CAREL product is a state-of-the-art product, whose operation is
specified in the technical documentation supplied with the product or
can be downloaded, even prior to purchase, from the website www.
CAREL.com.
Each CAREL product, in relation to its advanced level of technology,
requires setup / configuration / programming / commissioning to be
able to operate in the best possible way for the specific application. The
failure to complete such operations, which are required/indicated in the
user manual, may cause the final product to malfunction; CAREL accepts
no liability in such cases.
Only qualified personnel may install or carry out technical service on
the product.
The customer must only use the product in the manner described in the
documentation relating to the product.
In addition to observing any further warnings described in this manual,
the following warnings must be heeded for all CAREL products:
• Prevent the electronic circuits from getting wet. Rain, humidity
and all types of liquids or condensate contain corrosive minerals
that may damage the electronic circuits. In any case, the product
should be used or stored in environments that comply with the
temperature and humidity limits specified in the manual.
• Do not install the device in particularly hot environments. Too
high temperatures may reduce the life of electronic devices,
damage them and deform or melt the plastic parts. In any case,
the product should be used or stored in environments that
comply with the temperature and humidity limits specified in
the manual.
• Do not attempt to open the device in any way other than
described in the manual.
• Do not drop, hit or shake the device, as the internal circuits and
mechanisms may be irreparably damaged.
• Do not use corrosive chemicals, solvents or aggressive
detergents to clean the device.
• Do not use the product for applications other than those
specified in the technical manual.
All of the above suggestions likewise apply to the controllers, serial
boards, programming keys or any other accessory in the CAREL product
portfolio.
CAREL adopts a policy of continual development. Consequently, CAREL
reserves the right to make changes and improvements to any product
described in this document without prior warning.
The technical specifications shown in the manual may be changed
without prior warning.
The liability of CAREL in relation to its products is specified in the
CAREL general contract conditions, available on the website www.
CAREL.com and/or by specific agreements with customers; specifically,
to the extent where allowed by applicable legislation, in no case will
CAREL, its employees or subsidiaries be liable for any lost earnings or
sales, losses of data and information, costs of replacement goods or
services, damage to things or people, downtime or any direct, indirect,
incidental, actual, punitive, exemplary, special or consequential damage
of any kind whatsoever, whether contractual, extra-contractual or due
to negligence, or any other liabilities deriving from the installation, use
or impossibility to use the product, even if CAREL or its subsidiaries are
warned of the possibility of such damage.
DISPOSAL
INFORMATION FOR USERS ON THE CORRECT HANDLING OF WASTE
ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
In reference to European Union directive 2002/96/EC issued on 27
January 2003 and the related national legislation, please note that:
• WEEE cannot be disposed of as municipal waste and such waste
must be collected and disposed of separately;
• the public or private waste collection systems defined by local
legislation must be used. In addition, the equipment can be
returned to the distributor at the end of its working life when
buying new equipment;
• the equipment may contain hazardous substances: the improper
use or incorrect disposal of such may have negative effects on
human health and on the environment;
• the symbol (crossed-out wheeled bin) shown on the product or
on the packaging and on the instruction sheet indicates that the
equipment has been introduced onto the market after 13 August
2005 and that it must be disposed of separately;
• in the event of illegal disposal of electrical and electronic waste,
the penalties are specified by local waste disposal legislation.
Warranty on the materials: 2 years (from the date of production,
excluding consumables).
Approval: the quality and safety of CAREL INDUSTRIES Hqs products
are guaranteed by the ISO 9001 certified design and production system.
WARNING: separate as much as possible the probe and digital input
signal cables from the cables carrying inductive loads and power cables
to avoid possible electromagnetic disturbance. Never run power cables
(including the electrical panel wiring) and signal cables in the same
conduits.
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
Key icone
NOTE: to bring attention to a very important
subject; in particular, regarding the
practical use of the various functions of
the product.
IMPORTANT: to bring critical issues regarding the use
of the pRack PR100 to the attention of
the user.
TUTORIAL: some simple examples to accompany
the user in configuring the most common
settings.

pRack +040000071 rel. 1.1 - 14.10.2011
5
ENG
Content
1. START UP 7
1.1 Starting the first time .............................................................................................................................................7
1.2 Pre-configurations..................................................................................................................................................7
1.3 Wizard.............................................................................................................................................................................7
1.4 Example of configuring a system with 2 suction and condenser lines using ....................
the Wizard....................................................................................................................................................................8
2. PRE-CONFIGURATION 10
1.5 Advanced configuration..................................................................................................................................10
2.1 Pre-configuration 1: RS2 ..................................................................................................................................11
2.2 Pre-configuration 2: RS3 ..................................................................................................................................12
2.3 Pre-configuration 3: RS3p..............................................................................................................................14
2.4 Pre-configuration 4: RS3i .................................................................................................................................16
2.5 Pre-configuration 5: RS4 ..................................................................................................................................18
2.6 Pre-configurazione 6: RS4i..............................................................................................................................20
2.7 Pre-configuration 7: SL3d................................................................................................................................22
2.8 Pre-configuration 8: SL5d................................................................................................................................24
2.9 Pre-configuration 9: SW1.................................................................................................................................26
2.10 Pre-configuration 10: SW2..............................................................................................................................28
2.11 Pre-configuration 11: d-RS2...........................................................................................................................30
2.12 Pre-configuration 12: d-RS3...........................................................................................................................32
2.13 Pre-configuration 13: d-RS4...........................................................................................................................34
3. PARAMETERS TABLE 36

pRack +040000071 rel. 1.1 - 14.10.2011
7
ENG
1. START UP
1.1 Starting the first time
After having correctly installed pRack, as described
in the User Manual cod. +0300011EN, a number of
preliminary operations are required to configure the
installation.
Tutorial: the pRack PR100 configuration
procedure varies according to the complexity of
the installation:
A. systems with only one board and maximum one
external terminal. In this case, simply connect the
terminal (if not built-in), power up the board and
select one of the configuration solutions described
below.
B. systems with more than one board in pLAN or
two external terminals. In this case, the additional
operations described in Appendix A. 2 of the User
Manual cod.+0300011EN need to be completed
before proceeding with configuration.
The procedure for configuring an installation described
below is the same for all system configurations that
feature just one pRack PR100 board, and for system
configurations with more than one board connected
in a pLAN.
When first starting the pRack PR100 board, after waiting
around 1 minute, a screen is shown for choosing the
language used to display the program (English or Italian).
Press ENTER ( ) to change the language displayed,
while pressing ESC displays the following screen.
Note: If no option is chosen within a time set by
parameter and visible on the screen, the current
language remains selected.
Note: pRack PR100 is available as standard with
English and Italian languages loaded on board.
Other languages are available at ksa.carel.com that can
be loaded onto the control using the pRack Manager
software, following the procedure described in Chap. 10
of the User Manual cod.+0300011EN.
After having selected the user interface language, the
pRack PR100 software shows a screen for choosing
between three possible system configuration solutions,
as follows:
• Pre-configurations
• Wizard
• Advanced configuration.
Important: after having configured the system,
the configuration can be modified, it can be
modified by repeating the same procedure, making
sure the Carel default values have been reset as
described in paragraph 6.8.2 of the User Manual
cod.+0300011EN.
Important: after having configured the system,
power down the controller and power up again.
1.2 Pre-configurations
Start up
Select Config.Item:
PRE-CONFIGURATION
Choose one from the
configuration in the
list
Fig. 1.a
This solution is used to choose between thirteen
configurations pre-loaded in the pRack PR100 software.
For the description of the pre-configurations see the
table below, while for the complete description of each
configuration see Chap.2.
pRack PR100 automatically configures the inputs and
outputs as described in paragraph 4.1.4 of the User
Manual cod.+0300011EN; for details on the inputs and
outputs associated with each pre-configuration, see
Chap. 2.
1.3 Wizard
Start up
Select Config.Item:
WIZARD
Answer the questions
to have a fully
configuration
Fig. 1.b
This solution is used to obtain the recommended
configuration for the specific installation. By responding
to a series of questions, screen by screen, the user is
guided through the selection of the devices present.
Once the guided selection procedure has been
completed, the end result (report) is shown, and if
the configuration is suitable the parameters to start
operation of the pRack PR100 can be installed directly,
including those associated with the inputs and
outputs as described in parag. 4.1.4 of the User Manual
cod.+0300011EN.
Note: after having configured the parameters
using the Wizard, the configuration can be
modified manually, within the context of the selected

pRack +040000071 rel. 1.1 - 14.10.2011 8
ENG
system configuration.
Important: before starting the pRack PR100,
carefully check the settings made automatically
by the software.
Tutorial: The following paragraph shows a
configuration example using the Wizard for an
installation with two suction lines.
1.4 Example of configuring a system
with 2 suction and condenser
lines using the Wizard
Below is a possible example of using the Wizard to
configure a typical system like the one shown in the
figure, with 2 suction lines and 2 condenser lines on
different boards:
J7 J10J9J8J5
J1
G G0 +5Vref +VDC ID1 GND
J3
C1 NC1 NO1
J2
SYNC
B1 B2 B3 B4 B5 B6 GND
serial card 2
serial card 1
J4
J6
TLAN
GND
C2
NO2
GND
Y2 Y1
GNX
ISOLATED
Tx/Rx PWM 0/10V
GNDTx/Rx
24V (+10/-15%); 50/60 Hz
48V (36Vmin…72Vmax)
inputvoltage: max. power:
8VA / 6 W
I/O
I/O
J7 J10J9J8J5
J1
G G0 +5Vref +VDC ID1 GND
J3
C1 NC1 NO1
J2
SYNC
B1 B2 B3 B4 B5 B6 GND
serial card 2
serial card 1
J4
J6
TLAN
GND
C2
NO2
GND
Y2 Y1
GNX
ISOLATED
Tx/Rx PWM 0/10V
GNDTx/Rx
24V (+10/-15%); 50/60 Hz
48V (36Vmin…72Vmax)
inputvoltage: max. power:
8VA / 6 W
I/O
pLAN
I/O
Fig. 1.c
The preliminary operations to be completed before
configuration are as follows:
1. with the boards not connected in the pLAN, power
up the second pRack board and set the pLAN
address to 2 (for details see Appendix A.2 of the
User Manual cod.+0300011EN)
2. power down and connect the two boards in the
pLAN, plus any terminals, as described in paragraph
3.7 of the User Manual cod.+0300011EN.
3. power up the boards and wait for the Wizard
selection screen to be displayed
Then select the type of system as SUCTION &
CONDENSER:
Wizard Ib01
Type of Installation:
SUCTION & CONDENSER
Fig. 1.d
Set the type of compressors and control for suction
line 1, answering the questions prompted by the pRack
PR100 software, e.g.:
Wizard Ib03
Compressor config.
Compressor type:
RECIPROCATING
Compressor number: 3
Fig. 1.e
Wizard Ib40
Compressor config.
Regulation by:
PRESSURE
Measure unit: barg
Refrigerant: R404A
Fig. 1.f
Wizard Ib41
Compressor config.
Regulation type:
PROPORTIONAL BAND
Enable integral time
action: YES
Fig. 1.g
After having configured suction line 1, a prompt will be
shown to configure another suction line, obviously the
answer is YES:

pRack +040000071 rel. 1.1 - 14.10.2011
9
ENG
Wizard Ib43
Compressor config.
Configure another
suction line:
YES
Fig. 1.h
To the next question, which prompts if there is a pRack
board dedicated to the second line, answer YES; in this
way, the pRack PR100 software prepares to configure
the board with address 2 in the pLAN:
Wizard Ib45
Compressor config.
Dedicated pRack
board for
suction line:
YES
Fig. 1.i
After having answered the questions for the
configuration of the second suction line, the software
then asks if there is a pLAN board dedicated to
condenser line 1. In the case shown in the example,
answer NO.
Wizard Ib90
Compressor config.
Dedicated pRack
board for
suction line:
NO
Fig. 1.j
After having configured condenser line 1, the software
asks if condenser line 2 is used; answer YES:
Wizard Ib96
Configure another
condensing line:
YES
Fig. 1.k
After having also configured the second condenser line,
the software asks if a summary should be displayed of
the settings made:
Wizard Ib2a
Visualize Wizard
report:
NO
(Push (DOWN)
to continue)
Fig. 1.l
If the settings are correct, the set values can be installed:
Wizard Ib3a
Board necessary
All boards prsent
(ENTER) to continue
1
2
Fig. 1.m
After waiting a few seconds, the unit can be started.
Wizard
Successfully complete
Press (ENTER) to
continue
Fig. 1.n
Note: after having configured pRack PR100, the
device needs to be switched off and on again to
permanently save the new data.

pRack +040000071 rel. 1.1 - 14.10.2011 10
ENG
1.5 Advanced configuration
Start up
Select Config.Item:
ADVANCED CONFIGURATION
It only defines the
structure of the plant
For very expert users
Fig. 1.o
This solution is used to establish the configuration
of the pLAN structure required for correct system
operation.
Once the procedure for selecting the various factors
that affect the final configuration has been completed,
the pRack PR100 software verifies whether the pLAN
configuration is exact and prepares the user interface
for configuration of the parameters that need to be set
manually by the user.
Important: this configuration solution is only
recommended for expert users, as all the system
parameters need to be set manually
2. PRECONFIGURATION
Here below there are listed the configuration pre-set in the pRack software with the related features.
To enter the pre-configuration list it is necessary to select the item PRE-CONFIGURATION in the screen shown by
pRack software at start up (see Chapter 1).
Summary of pre-configurations
compressors fans Units in the
pLAN(as
well as the
terminal)
pRack PR100
Version
N° index lines type N° capacity
step
modulation No. of
comp.
alarms
N° inverter
1 RS2 1 Piston - Scroll 2 - - 1 2 - 1 Compact
2 RS3 1 Piston - Scroll 3 - - 1 3 - 1 Small
3 RS3p 1 Piston - Scroll 3 1 - 2 1 Inverter 1 Medium
4 RS3i 1 Piston - Scroll 3 Inverter 3 1 Inverter 1 Medium
5 RS4 1 Piston - Scroll 4 - - 2 4 - 1 Medium
6 RS4i 1 Piston - Scroll 4 - Inverter 3 1 Inverter 1 Large
7 SL3d 1 Scroll 3 - Digital 1 2 - 1 Medium
8 SL5d 1 Scroll 5 - Digital 1 1 Inverter 1 Medium
9 SW1 1 Screw 1 2 - 2 2 - 1 Small
10 SW2 1 Screw 2 2 - 2 1 Inverter 1 Small
11 d-RS2 2 Piston - Scroll 2 - - 1 2 - 1 Medium
2- - 1
12 d-RS3 2 Piston - Scroll 3 - - 1 3 - 1 Large
3- - 1 3 -
13 d-RS4 2 Piston - Scroll 4 - Inverter 3 1 Inverter 1,2 Medium + Medium
4 - Inverter 3 1 Inverter
Tab. 2.a

pRack +040000071 rel. 1.1 - 14.10.2011
11
ENG
2.1 Pre-configuration 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 differential 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 differential 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

pRack +040000071 rel. 1.1 - 14.10.2011 12
ENG
2.2 Pre-configuration 2: RS3
F1
NO4 NO5
F2
NO7
C1
NO1
ID3
Tsuct Psuct
B3 B1
ID6
NO6
F3
C2
NO2
ID4
C3
NO3
ID5
Tdis
B4
Pcond
B2
Fig. 2.b
Description
3 reciprocating/ scroll compressors
3 fans
1 generic alarm for each compressor
1 generic alarm for condenser
HP/LP pressostats
pRack S, PRK100S**

pRack +040000071 rel. 1.1 - 14.10.2011
13
ENG
I/O list
Digital outputs
NO1 Compressor 1
NO2 Compressor 2
NO3 Compressor 3
NO4 Fan 1
NO5 Fan 2
NO6 Fan 3
NO7 Alarms output
Digital inputs
ID1 Suction HP pressostat
ID2 Suction LP pressostat
ID3 Generic compressor 1 alarm
ID4 Generic compressor 2 alarm
ID5 Generic compressor 3 alarm
ID6 Common fan overload
Analog inputs
B1 Suction pressure probe 4...20 mA -0.5..7.0 barg
B2 Condensing pressure probe 4...20 mA 0.0..30.0 barg
B3 Suction temperature probe NTC
B4 Discharge temperature probe HTNTC
Tab. 2.d
Main parameters
Parameter Mask index Value
Suction regulation by Cab01 PRESSURE
Suction regulation type Cab01 NEUTRAL ZONE
Suction setpoint Cab03 3.5,barg
Suction differential 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 PRESSURE
Condenser regulation type Dab01 PROPORTIONAL BAND
Condenser setpoint Dab03 12.0 barg
Condenser differential Dab07 2.0 barg
High condenser pressure alarm threshold Dae01 24.0 barg
Low condenser pressure alarm threshold Dae03 7.0 barg
Tab. 2.e

pRack +040000071 rel. 1.1 - 14.10.2011 14
ENG
2.3 Pre-configuration 3: RS3p
Y1
ID10
NO7
ID9
F
NO8
C1
NO1
NO2
ID3
ID4
Tsuct Psuct
B3 B1
C2
NO3
NO4
ID5
ID6
C3
NO5
NO6
ID7
ID8
Tdis
B4
Pcond
B2
Text
B5
Fig. 2.c
Description
3 reciprocating compressors with one unloader each
1 fan stage with inverter
2 alarms for each compressor: thermal overload, oil
1 generic alarm for condenser
HP/LP pressostats
pRack M, PRK100M*

pRack +040000071 rel. 1.1 - 14.10.2011
15
ENG
I/O list
Digital outputs
NO1 Compressor 1
NO2 Compressor 1, unloader
NO3 Compressor 2
NO4 Compressor 2, unloader
NO5 Compressor 3
NO6 Compressor 3, unloader
NO7 Fan
NO8 Alarms output
Digital inputs
ID1 Suction HP pressostat
ID2 Suction LP pressostat
ID3 Compressor 1, thermal overload alarm
ID4 Compressor 1, oil alarm
ID5 Compressor 2, thermal overload alarm
ID6 Compressor 2, oil alarm
ID7 Compressor 3, thermal overload alarm
ID8 Compressor 3, oil alarm
ID9 Common fan overload
ID10 Inverter alarm
Analog outputs
Y1 Common condenser inverter
Analog inputs
B1 Suction pressure probe 4...20 mA -0.5..7.0 barg
B2 Condensing pressure probe 4...20 mA 0.0..30.0 barg
B3 Suction temperature probe NTC
B4 Discharge temperature probe HTNTC
B5 External temperature probe NTC
Tab. 2.f
Main parameters
Parameter Mask index Value
Suction regulation by Cab01 PRESSURE
Suction regulation type Cab03 NEUTRAL ZONE
Suction setpoint Cab08 3.5,barg
Suction differential Caf10 0.3 barg
Compressors rotation type Caf04 FIFO
Refrigerant Cae24 R404A
High suction pressure alarm threshold Cae26 6.0 barg
Low suction pressure alarm threshold Cab01 0.0 barg
Condenser regulation by Dab01 PRESSURE
Condenser regulation type Dab03 PROPORTIONAL BAND
Condenser setpoint Dab07 12.0 barg
Condenser differential Dae01 2.0 barg
High condenser pressure alarm threshold Dae03 24.0 barg
Low condenser pressure alarm threshold Cab01 7.0 barg Tab. 2.g

pRack +040000071 rel. 1.1 - 14.10.2011 16
ENG
2.4 Pre-configuration 4: RS3i
Y2
ID14
NO4
ID12
F
NO5
C1
NO1
ID3
ID4
ID5
Tsuct Psuct
B3 B1
C2
NO2
ID6
ID7
ID8
C3
NO3
ID9
ID10
ID11
Tdis
B4
Pcond
B2
Text
B5
Y1
ID13
Fig. 2.d
Description
3 reciprocating compressors, the first with inverter
1 fan stage with inverter
3 alarms for each compressor: thermal overload, oil, HP/LP
1 generic alarm for condenser
HP/LP pressostats
pRack M, PRK100M

pRack +040000071 rel. 1.1 - 14.10.2011
17
ENG
I/O List
Digital outputs
NO1 Compressor 1
NO2 Compressor 2
NO3 Compressor 3
NO4 Fan 1
NO5 Alarms output
Digital inputs
ID1 Suction HP pressostat
ID2 Suction LP pressostat
ID3 Compressor 1, thermal overload alarm
ID4 Compressor 1, oil alarm
ID5 Compressor 1, HP/LP alarm
ID6 Compressor 2, thermal overload alarm
ID7 Compressor 2, oil alarm
ID8 Compressor 2, HP/LP alarm
ID9 Compressor 3, thermal overload alarm
ID10 Compressor 3, oil alarm
ID11 Compressor 3, HP/LP alarm
ID12 Common fan overload
ID13 Compressor inverter alarm
ID14 Condenser inverter alarm
Analog outputs
Y1 First compressor inverter 0...10 Vdc
Y2 Condenser inverter 0...10 Vdc
Analog inputs
B1 Suction pressure probe 4...20 mA -0.5..7.0 barg
B2 Condensing pressure probe 4...20 mA 0.0..30.0 barg
B3 Suction temperature probe NTC
B4 Discharge temperature probe HTNTC
B5 External temperature probe NTC
Tab. 2.h
Main parameters
Parameter Mask index Value
Suction regulation by Cab01 PRESSURE
Suction regulation type Cab01 NEUTRAL ZONE
Suction setpoint Cab03 3.5,barg
Suction differential 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 PRESSURE
Condenser regulation type Dab01 PROPORTIONAL BAND
Condenser setpoint Dab03 12.0 barg
Condenser differential Dab07 2.0 barg
High condenser pressure alarm threshold Dae01 24.0 barg
Low condenser pressure alarm threshold Dae03 7.0 barg
Tab. 2.i

pRack +040000071 rel. 1.1 - 14.10.2011 18
ENG
2.5 Pre-configuration 5: RS4
ID11
NO9
C1
NO1
ID3
ID4
Tsuct Psuct
B3 B1
C2
NO2
ID5
ID6
C3
NO3
ID7
ID8
Tdis
B4
Pcond
B2
Text
B5
F1
NO5 NO6
F2
NO7
F3
NO8
F4
C3
NO4
ID9
ID10
Fig. 2.e
Descrizption
4 reciprocating/ scroll compressors
4 fans
2 alarms for each compressor: thermal overload, oil
1 generic alarm for condenser
HP/LP pressostats
pRack M, PRK100M*

pRack +040000071 rel. 1.1 - 14.10.2011
19
ENG
I/O List
Digital outputs
NO1 Compressor 1
NO2 Compressor 2
NO3 Compressor 3
NO4 Compressor 4
NO5 Fan1
NO6 Fan2
NO7 Fan3
NO8 Fan4
NO9 Alarms output
Digital inputs
ID1 Suction HP pressostat
ID2 Suction LP pressostat
ID3 Compressor 1, thermal overload alarm
ID4 Compressor 1, oil alarm
ID5 Compressor 2, thermal overload alarm
ID6 Compressor 2, oil alarm
ID7 Compressor 3, thermal overload alarm
ID8 Compressor 3, oil alarm
ID9 Compressor 4, thermal overload alarm
ID10 Compressor 4, oil alarm
ID11 Common fan overload
Analog inputs
B1 Suction pressure probe 4...20 mA -0.5..7.0 barg
B2 Condensing pressure probe 4...20 mA 0.0..30.0 barg
B3 Suction temperature probe NTC
B4 Discharge temperature probe HTNTC
B5 External temperature probe NTC
Tab. 2.j
Main parameters
Parameter Mask index Value
Suction regulation by Cab01 PRESSURE
Suction regulation type Cab01 NEUTRAL ZONE
Suction setpoint Cab03 3.5,barg
Suction differential 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 PRESSURE
Condenser regulation type Dab01 PROPORTIONAL BAND
Condenser setpoint Dab03 12.0 barg
Condenser differential Dab07 2.0 barg
High condenser pressure alarm threshold Dae01 24.0 barg
Low condenser pressure alarm threshold Dae03 7.0 barg
Tab. 2.k

pRack +040000071 rel. 1.1 - 14.10.2011 20
ENG
2.6 Pre-configurazione 6: RS4i
NO5
ID15
F
Y2
ID17
Y1
ID16
NO6
C1
NO1
ID3
ID4
ID5
Tsuct Psuct
B3 B1
C2
NO2
ID6
ID7
ID8
C3
NO3
ID9
ID10
ID11
Tdis
B4
Pcond
B2
Text
B5
C3
NO4
ID12
ID13
ID14
Fig. 2.f
Description
4 reciprocating/ scroll compressors, the first with inverter
1 fan stage with inverter
3 alarms for each compressor: thermal overload, oil differential, HP/LP
1 generic alarm for condenser
HP/LP pressostats
pRack L, PRK100L**