Emerson dixell XC650CX User manual

XC650CX
(v. 3.5)

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INDEX
1. BEFORE PROCEEDING 6
1.1 CHECK THE SW REL.OF THE XC650CX 6
2. GENERAL WARNING 6
2.1 PLEASE READ BEFORE USING THIS MANUAL 6
2.2 SAFETY PRECAUTIONS 6
3. GENERAL DESCRIPTION 7
4. COMPONENTS RELATED TO THE XC650CX 7
4.1 CW15KIT AND CW25KIT: WIRING KITS 8
4.2 CABCJ15 OR CABCJ30: 2PIN CONNECTORS 8
4.3 PP07, PP11, PP30 PP50: 4÷20MAPRESSURE TRANSDUCERS 8
4.4 XJ485CX: TTL /RS485 SERIAL CONVERTER 8
5. WIRING & ELECTRICAL CONNECTIONS 9
5.1 GENERAL WARNINGS 9
5.2 WIRING CONNECTIONS 9
5.3 PROBES CONNECTION 9
5.4 LOAD CONNECTIONS 10
5.5 SAFETY AND CONFIGURABLE DIGITAL INPUTS –FREE VOLTAGE 11
5.6 ANALOG OUTPUT CONNECTION 11
5.7 HOW TO CONNECT MONITORING SYSTEM -RS485 SERIAL LINE 12
6. MOUNTING & INSTALLATION 12
7. FIRST INSTALLATION 13
7.1 HOW TO SET THE KIND OF GAS 13
7.2 HOW TO SET THE RANGE OF THE PRESSURE PROBES 13
8. USER INTERFACE 14
8.1 DISPLAYING 14
8.2 KEYBOARD 14
8.3 ICONS 15
9. HOW TO SEE AND MODIFY THE SET POINT(S) 15
9.1 HOW TO SEE THE SET POINT OF COMPRESSORS AND/OR FANS 15
9.2 HOW TO MODIFY THE SET POINT OF COMPRESSORS AND/OR FANS 16
10. THE INFO MENU 16
11. PARAMETERS PROGRAMMING 17
11.1 HOW TO ENTER THE “PR1” PARAMETER LIST 17
11.2 HOW TO ENTER IN PARAMETERS LIST “PR2” 17
11.3 HOW TO CHANGE PARAMETER VALUES 17

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12. HOW TO DISABLED AN OUTPUT 18
12.1 HOW TO DISABLED AN OUTPUT DURING A MAINTENANCE SESSION. 18
12.2 OUTPUT DISABLED SIGNALING. 18
12.3 REGULATION WITH SOME OUTPUTS DISABLED. 18
13. RUNNING HOURS OF LOADS 18
13.1 HOW TO DISPLAY THE RUNNING HOURS OF A LOAD. 18
13.2 HOW TO RESET THE RUNNING HOURS OF A LOAD. 18
14. ALARM MENU 19
14.1 HOW TO SEE THE ALARMS 19
15. KEYBOARD LOCKING 19
15.1 HOW TO LOCK THE KEYBOARD 19
15.2 TO UNLOCK THE KEYBOARD 19
16. USE OF THE PROGRAMMING “HOT KEY “ 19
16.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD) 19
16.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD) 20
17. LIST OF PARAMETERS 20
17.1 PLANT DIMENSIONING AND TYPE OF REGULATION. 20
17.2 PROBES CONFIGURATION 24
17.3 CONFIGURABLE DIGITAL INPUTS CONFIGURATION 26
17.4 DISPLAY AND MEASUREMENT UNIT 27
17.5 COMPRESSOR REGULATION 27
17.6 LIQUID INJECTION THERMOSTAT 28
17.7 FANS REGULATION 29
17.8 ALARMS –COMPRESSOR SECTION 29
17.9 ALARMS –FANS SECTION 30
17.10 SUCTION SUPERHEAT OF CIRCUIT 1 30
17.11 DYNAMIC SET POINT FOR FAN 31
17.12 ANALOG OUTPUT 1(OPTIONAL)–TERMINALS 29-30 31
17.13 ANALOG OUTPUT 2(OPTIONAL)–TERMINALS 8-10 32
17.14 OTHER 32
18. EVEN CAPACITY COMPRESSORS (CTYP = SPO) 33
18.1 COMPRESSORS WITH SAME CAPACITY –DEAD BAND CONTROL 33
19. UNEVEN CAPACITY COMPRESSORS (CTYP = DPO) 34
20. SCREW COMPRESSORS (CTYP = SCR) 34
20.1 REGULATION WITH SCREW COMPRESSORS LIKE BITZER/HANBELL/REFCOMP ETC 35
21. FAN REGULATION 35
21.1 CONDENSER WITH INVERTER OR ECI FANS–ANALOG OUTPUT SETTING 36
21.2 ANALOG OUTPUT “FREE”37
22. ADDITIONAL FUNCTIONS 39
22.1 COMPRESSOR RUNNING PROOF FUNCTION 39
22.2 FLOOD PROTECTION FUNCTION 40

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22.3 SUCTION SUPERHEAT MONITORING 41
22.4 HOT GAS INJECTION VALVE 42
23. ALARM LIST 42
23.1 TYPES OF ALARMS AND SIGNALING MANAGED 42
23.2 BUZZER MUTING 46
23.3 ALARM CONDITIONS –SUMMARY TABLE 46
24. TECHNICAL FEATURES 49
25. PARAMETERS –DEFAULT VALUES 50

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1. BEFORE PROCEEDING
1.1 Check the sw rel. of the XC650CX
1. Look at the SW rel. of XC650CX printed on the label of the controller.
2. If the SW release is 3.5, proceed, proceed with this manual otherwise contact Dixell at
www.dixell.com to get the right manual.
2. GENERAL WARNING
2.1 Please read before using this manual
•This manual is part of the product and should be kept near the instrument for easy and quick
reference.
•The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
•Check the application limits before proceeding.
•Dixell Srl reserves the right to change the composition of its products, even without notice,
ensuring the same and unchanged functionality.
2.2 Safety Precautions
•Check the supply voltage is correct before connecting the instrument.
•Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of
condensation
•Warning: disconnect all electrical connections before any kind of maintenance.
•The instrument must not be opened.
•In case of failure or faulty operation send the instrument back to the distributor or to “Dixell
S.r.l.” (See address) with a detailed description of the fault.
•Consider the maximum current which can be applied to each relay (see Technical Data).
•Ensure that the wires for probes, loads and the power supply are separated and far enough
from each other, without crossing or intertwining.
•Fit the probe where it is not accessible by the end user.
•In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.

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3. General description
The XC650CX is designed to manage both compressors and fans in a condensing system such
as a pack. The compressors can be scroll or Stream, simple or multistage.
It’s possible to manage up to 2 suction circuits with a common condenser.
Control is by means of a neutral zone and is based on the pressure or temperature sensed in the
LP suction (compressors) and HP (condenser) circuits. A special algorithm balances the run hours
of the compressors to distribute the work load uniformly.
The controllers can convert both LP and HP pressures and displays them as temperatures.
The front panel offers complete information on the system’s status by displaying the suction and
condenser pressure (temperatures), the status of the loads, possible alarms or maintenance
conditions.
Each load has its own alarm input that is able to stop it when activated.
By means of the HOT KEY the controller can be easy programmed at power on.
The controller can be connected to the X-WEB, controlling and monitoring system, thanks to the
RS485 serial output, using the standard ModBus RTU protocol.
4. COMPONENTS RELATED TO THE XC650CX
Name
Description
Part number
Transformer
TF5 230V/12Vac
CD050010 00
Wiring kit 1.5m and 3m
CW15-Kit (1.5m)
CW25-Kit (2.5m)
DD500001 50
DD500002 50
Female disconnect able connector for digital input
or analog output (4pcs)
CABCJ15 (1,5m)
CABCJ30 (3,0m)
DD200101 50
DD200103 00
TTL /RS485 serial converter
XJ485CX+CABRS02
J7MAZZZ9AA
4-20mA suction pressure transducer
PP11 (-0.5÷11bar)
BE009302 07
4-20mA condenser pressure transducer
PP30 (0÷30bar)
BE009302 04
Hot key for programming
HOT KEY 4K
DK00000100

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4.1 CW15KIT and CW25KIT: wiring kits
The XC650CX is provided with 2
socket connectors with 14 and 12
pins.
For the wiring the CW15KIT (1.5m
cable length) or CWC25KIT (2.5m
cable length) have to be used.
4.2 CABCJ15 or CABCJ30: 2 PIN connectors
NOTE:
Use the connection cable CABCJ15 (1.5m lenght) or the
CABCJ30 (3.0m lenght) for the:
- HP digital input (31-32),
- D.I.7 digital input 7(33-34),
- 0-10Vdc or 4-20mA analogue output (29-30)
- oA6, 12Vdc/40mA digital output (27-28)
4.3 PP07, PP11, PP30 PP50: 4÷20mA pressure transducers
NAME
CABLE LENGTH
RANGE
DIXELL CODE
PP07
2,0MT
-0,5+7 bar rel FE
BE009302 00
PP11
2,0MT
-0,5+11 bar rel FE
BE009302 07
PP30
2,0MT
0+30 bar rel FE
BE009302 04
PP50
2,0MT
0+50 bar rel FE
BE009302 05
4.4 XJ485CX: TTL / RS485 serial converter
The XJ485CX is a TTL/RS485 external
converter. Insert it into the TTL receptacle to
convert the TTL output into a RS485 (+) and (-)
signal for the monitoring system MODBUS_RTU
compatible. (XWEB).

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5. WIRING & ELECTRICAL CONNECTIONS
5.1 General warnings
Before connecting cables make sure the power supply complies with the instrument’s
requirements.
Separate the probe cables from the power supply cables, from the outputs and the power
connections.
Do not exceed the maximum current allowed on each relay 5A resistive, in case of heavier
loads use a suitable external relay.
5.2 Wiring connections
NOTE
24V version: use terminals 1-2 for power supply;
5.3 Probes connection
5.3.1 General warnings
Pressure probe (4 - 20mAor ratiometric): respect the polarity. If using terminal ends be sure
there are no bear parts which could cause short circuiting or introduce noise disturbance at high
frequencies. To minimize the induced disturbances use shielded cables with the shield connected
to earth.
Temperature probe: it is recommended to place the temperature probe away from direct air
streams to correctly measure the temperature.
5.3.2 Probe wirings
Low voltage side : Keep the cables away from the power cables. Use shielded cable to lengthen the
cables.
NOTE1: The PIN 4 is the common line for the temperature probes
NOTE2: The PIN 6 gives a 12Vdc supply for the 4-20mA pressure transducers

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PP07 PP11, PP30, PP50 4÷20mA pressure
transducers respect the polarity.
Suction (P1C = Cur)
Brown (+) to terminal 6 ; white (-) to terminal 5
Condenser (P2C = Cur)
Brown (+) to terminal 6 ; white (-) to terminal 7
Suction 2 - optional (P3C = Cur)
Brown (+) to terminal 6; white (-) to terminal 3
3 5 7
4 6 8
12V
40mA
§
Pb1
Pb3 Pb2
Temperature probes (NTC 10K)
Suction: 4-5 (P1C = NTC)
Condenser: 4-7 (P2C =NTC)
Pb3 (P3C = NTC): 4-3
3 5 7
4 6 8
Pb1Pb3 Pb2
Ratiometric transducers (0.5÷4.5Vdc)
Suction (P1C = 0-5)
5 (In); 4(+); 10 (gnd)
Condenser (P2C =0-5)
7 (In); 4(+); 10 (gnd)
Suction 2 - optional (P3C = 0-5)
3 (In); 4(+); 10(gnd)
5V
4 0 m A
§
1 3 5 7 9
2 4 6 8 10
+
In
Pb1 Pb2
In
Gnd
In
Pb3
5.4 LOAD CONNECTIONS
NOTE: Main voltage side (12PINs connector):
- the PIN 17, 19 are the common line for the relay outputs with pin 15 and 16
- the PIN 21, 22 are the common line for all the relay outputs with pin 18 and 20
- and all of them have to be used.