Emerson EC2-XC645CX Verdrahtungsschema

÷÷

EC2-XC645CX

(v. 3.5)

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INDEX

BEFORE PROCEEDING 5

1.1 CHECK THE SW REL.OF THE EC2-XC645CX 5

GENERAL WARNING 5

2.1 PLEASE READ BEFORE USING THIS MANUAL 5

2.2 SAFETY PRECAUTIONS 5

GENERAL DESCRIPTION 6

COMPONENTS RELATED TO THE EC2-XC645CX 6

4.1 CWC15KIT AND CWC30KIT: WIRING KITS 6

4.2 CABCJ15 OR CABCJ30: 2PIN CONNECTORS 7

4.3 PT5N: 4÷20 MAPRESSURE TRANSDUCERS AND CABLE ASSEMBLIES 7

4.4 DISCHARGE TEMPERATURE OF DIGITAL SCROLL 7

4.5 XJ485CX: TTL /RS485 SERIAL CONVERTER 7

WIRING & ELECTRICAL CONNECTIONS 8

5.1 GENERAL WARNINGS 8

5.2 WIRING CONNECTIONS 8

5.3 PROBE CONNECTION 9

5.4 LOAD CONNECTIONS 10

5.5 SAFETY AND CONFIGURABLE DIGITAL INPUTS –FREE VOLTAGE 10

5.6 ANALOG OUTPUT CONNECTION 11

5.7 HOW TO CONNECT MONITORING SYSTEM -RS485 SERIAL LINE 11

MOUNTING & INSTALLATION 12

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

USER INTERFACE 14

8.1 DISPLAYING 14

8.2 KEYBOARD 14

8.3 ICONS 15

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

THE INFO MENUE 16

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PARAMETER PROGRAMMING 17

11.1 HOW TO ENTER THE “PR1” PARAMETER LIST 17

11.2 HOW TO ENTER IN PARAMETER LIST “PR2” 17

11.3 HOW TO CHANGE PARAMETER VALUES 17

HOW TO DISABLE AN OUTPUT 18

12.1 HOW TO DISABLE AN OUTPUT DURING A MAINTENANCE SESSION. 18

12.2 OUTPUT DISABLED SIGNALING. 18

12.3 REGULATION WITH SOME OUTPUTS DISABLED. 18

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

ALARM MENUE 19

14.1 HOW TO SEE THE ALARMS 19

KEYBOARD LOCKING 19

15.1 HOW TO LOCK THE KEYBOARD 19

15.2 TO UNLOCK THE KEYBOARD 19

USE OF THE PROGRAMMING “HOT KEY “ 20

16.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD) 20

16.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY (DOWNLOAD) 20

LIST OF PARAMETERS 20

17.1 PLANT DIMENSIONING AND TYPE OF REGULATION. 20

17.2 PROBE CONFIGURATION 23

17.3 OTHER INPUT CONFIGURATION 24

17.4 DISPLAY AND MEASUREMENT UNIT 25

17.5 COMPRESSOR REGULATION 26

17.6 LIQUID INJECTION THERMOSTAT 27

17.7 FANS REGULATION 27

17.8 ALARMS –COMPRESSOR SECTION 28

17.9 ALARMS –DLT SECTION 28

17.10 ALARMS –FANS SECTION 28

17.11 SUCTION SUPERHEAT 29

17.12 DYNAMIC SET POINT FOR FAN 30

17.13 ANALOG OUTPUTS (OPTIONAL)-TERMINALS 23-34 30

17.14 ANALOG OUTPUT 2(OPTIONAL)–TERMINALS 8-10 31

17.15 OTHER 31

TYPE OF REGULATION 32

18.1 DIGITAL COMPRESSOR REGULATION 32

18.2 PROPORTIONAL BAND REGULATION -ONLY FOR FANS 36

18.3 CONDENSER WITH INVERTER OR EC FANS–ANALOG OUTPUT SETTING 37

18.4 ANALOG OUTPUT “FREE” 38

ADDITIONAL FUNCTIONS 39

19.1 COMPRESSOR RUNNING PROOF FUNCTION 39

19.2 FLOOD PROTECTION FUNCTION 40

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19.3 SUCTION SUPERHEAT MONITORING 41

19.4 HOT GAS INJECTION VALVE 42

ALARM LIST 42

20.1 TYPES OF ALARMS AND SIGNALING MANAGED 42

20.2 BUZZER MUTING 45

20.3 ALARM CONDITIONS –SUMMARY TABLE 45

TECHNICAL FEATURES 48

PARAMETERS – DEFAULT VALUES 49

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BEFORE PROCEEDING

1.1 Check the sw rel. of the EC2-XC645CX

1. Look at the SW rel. of XC64D printed on the label of the controller.

2. If the SW release is 3.5, proceed with this manual otherwise contact Emerson to get

the right manual.

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.

•Emerson 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

condensations.

•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

“Emerson.” (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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GENERAL DESCRIPTION

The EC2-XC645CX is designed to manage both compressors and fans in a condensing system

such as a pack.

The compressors can be digital scroll, simple, multistage.

It’s possible to manage suction circuit and condenser.

Control is by means of a neutral zone or proportional band 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 workload uniformly.

The controllers can convert both suction and discharge pressure 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. To guarantee the total

system’s safety, there are also two inputs for low- and high-pressure switches: when these are

activated, the system is stopped.

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

serial TTL output, using the standard ModBus RTU protocol.

COMPONENTS RELATED TO THE EC2-XC645CX

Name Description Part No.

Transformer

ECT-323 230 V/24 VAC 804424

Wiring kit 1.5 m and 3 m

CWC30-Kit (3.0 m) 807724

Female disconnect able connector for digital

input or analog output (4 pcs)

CABCJ30 (3.0 m) 807723

TTL / RS485 serial converter

XJ485CX+CABRS02

J7MAZZZ9AA

4-20 mA suction pressure transducer

PT5N-07M (-0.8+7 bar)

805350

4-20 mA condenser pressure transducer

PT5N-30M (0+30 bar)

805352

Cable Assembly for PT5N 3 m

PT4-M30

804804

4.1 CWC15KIT and CWC30KIT: wiring kits

The EC2-XC645CX is provided with 2 socket

connectors with 14 and 6 pins.

For the wiring, the CWC15KIT (1.5 m cable

length) or CWC30KIT (3.0 m cable length) have

to be used.

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4.2 CABCJ15 or CABCJ30: 2 PIN connectors

NOTE:

Use the connection cable CABCJ15 (1.5 m

length)or the CABCJ30 (3.0 m length) for the:

- HP digital input (25-26),

- i2F configurable digital input (27-28),

- 0-10Vdc or 4-20mA analogue output

(23-24)

- oA6, 12 VD/4 0mA digital output (21-22)

4.3 PT5N: 4÷20 mA pressure transducers and cable assemblies

Name Range Part No. Name Length Part No.

PT5N-07M / T

-0.8+7 bar (g)

805350 / 805380

PT4-M15

1.5 m

804803

PT5N-18M / T

0+18 bar (g)

805351 / 805381

PT4-M30

3 m

804804

PT5N-30M / T

0+30 bar (g)

805352 / 805382

PT4-M60

6 m

804805

PT5N-50M / T

0+50 bar (g)

805353 / 805383

4.4 Discharge temperature of Digital Scroll

The discharge temperature probe NTC-86k type supplied with Copeland Digital scroll should be

used.

4.5 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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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 3A resistive, see also Technical

Features, in case of heavier loads use a suitable external relay.

5.2 Wiring connections

•Always use a class 2 transformer with minimum power 5 VA such as TF5.

•Terminals [21-22], [23-24], [25-26], [27-28] are provided with JST 2 PINS connectors, they

require the CABCJ15 (1.5 m) or CABCJ30 (3 m) wiring cables.

ALL LOADS AT 24 VAC

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5.3 Probe connection

General warnings

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.

Pressure probe (4 - 20 mA): 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.

Probe wirings

Low voltage side (14 PINs connector):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 4-20 mA pressure transducers.

PP07 PP11, PP30, PP50 4 - 20 mA 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

Temperature probes (NTC 10 K)

Suction: 4 - 5 (P1C = NTC)

Condenser: 4 - 7 (P2C = NTC)

Pb3: (P3C = NTC): 4 - 3

Pb4: (P4C = Nt10) 27 - 28

Ratiometric transducers (0.5 - 4.5 VDC)

Suction (P1C = 0-5)

5 (In); 4(+); 10 (gnd)

Condenser (P2C = 0-5)

7 (In); 4(+); 10 (gnd)

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5.4 Load connections

!!!WARNING: Digital Scroll valve coil MUST operate at main voltage (24 VAC)!!

NOTE: Main voltage side (6 PINs connector): the PIN 17 is the common line for all the relay outputs

and for the TRIAC.

5.5 Safety and configurable digital inputs – free voltage

Loads safety inputs

!!!WARNING: free voltage inputs!!!!

Controller has 7 configurable digital inputs, free voltage.

Each digital input can be set by the related parameter iF01 - iF07.

The digital inputs are factory pre-set to operate as safety input for loads and as HP and LP. This

input has to collect the status of the safety devices related to the compressor such as thermistors,

pressure switches etc.

When this input is activated the correspondence, load is switched off and not considered for the

regulation.

The correspondence between loads (compressors or fans) and safety inputs is the following:

LOAD TERMINALS INPUT TERMINALS SETTING

Load 1

15-17

Di1

10-13

iF01 = oA1

Load 2

16-17

Di2

10-14

iF02 = oA2

Load 3

18-17

Di3

10-11

iF03 = oA3

Load 4

20-17

Di4

10-12

iF04 = oA4

Load 6

21-22

Di7

27-28

iF07 = oA6

Circuit with 1 SUCTION and 1 CONDENSER: HP – LP Pressure

switch connections

The controller is preset to manage also the low-pressure switch and the high-pressure switch,

both the inputs are free voltage.

Connect the pressure switches as described in the following table:

PRESSURE SWITCH INPUT TERMINALS SETTING

Di5

10-9

iF05 = LP1

HP*

Di6

25-26

iF06 = HP

Note: *) The digital input 6 (25-26) requires the adapter CABCJ15 or CABCJ30 to be used.

See par. Error! Reference source not found. Error! Reference source not found.

24VAC

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