Emerson EC2-552 Installing And Operating Instructions Download Page 6

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OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX

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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

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.

Summary of Contents for EC2-552

Page 1: ... EC2 XC645CX v 3 5 ...

Page 2: ...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...

Page 3: ... 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 SECTI...

Page 4: ...C645CX 4 54 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 ...

Page 5: ...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 ca...

Page 6: ...put 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...

Page 7: ...e 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 se...

Page 8: ...upply 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...

Page 9: ...ed 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 pressu...

Page 10: ...hes 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 oA...

Page 11: ...og output 2 8 10 2AOC Kind of signal 4 20 mA 0 10 V 2AOF function 5 7 How to connect monitoring system RS485 Serial line The EC2 XC645CX can be connected to a monitoring system thanks to the serial output To convert the TTL to RS485 signal the XJ485CX has to be used 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...

Page 12: ...internal use Instruments shall be mounted on panel in a 29 x 71 mm hole and fixed using the special brackets supplied The ambient operating temperature range is between 10 60 C Avoid locations subject to heavy vibration corrosive gases or excessive dirt The same applies to the probes Ensure ventilation around the instrument ...

Page 13: ... 2 How to set the range of the pressure probes If an instrument with the following part number is used EC2 XC645CX xxxxF it is pre set to work with pressure probe with the following range Probe 1 0 5 11 0 bar relative pressure Probe 2 0 30 0 bar relative pressure If the probes you re using have a different range act as in the following To set the pressure range of the Probe 1 suction probe use the...

Page 14: ...de it browses the parameter codes or increases the displayed value With Hot key inserted it starts the Hot key programming procedure To access the INFO menu push and release it to access the INFO menu n DOWN In programming mode it browses the parameter codes or decreases the displayed value Manual restart of loads By holding it pressed for 3s it switches on again loads previous locked by a safety ...

Page 15: ...al input alarm for Load 6 2Hz o Load 6 in maintenance status 2Hz ON The valve of the Digital scroll compressor is energized ON The Maintenance menu has been entered Flashing One or more loads have been placed in maintenance status LP ON Low pressure switch alarm HP ON High pressure switch alarm ON Alarm is happening ON All the stored alarms have been seen Flashing A new alarm has happened HOW TO S...

Page 16: ...ing 9 To change its value push the o or n within 30 seconds EXIT Push the SET key or wait for 30 without pressing any keys THE INFO MENUE The controller can display some information directly from the main menu The INFO menu is accessible by pushing and releasing the UP key Here below the list of the information that can be displayed NOTE This information is displayed only if the related function i...

Page 17: ...econds without pressing a key NOTE The set value is stored even when the procedure is excited by waiting the time out to expire 11 2 How to enter in parameter list Pr2 The Pr2 parameter list is protected by a security code Password SECURITY CODE is 3210 To access parameters in Pr2 1 Enter the Pr1 level 2 Select Pr2 parameter and press the SET key 3 The flashing value 0 is displayed 4 Use o or n to...

Page 18: ...is disabled its led blinks 2 Hz 12 3 Regulation with some outputs disabled If some outputs are disabled they do not take part to the regulation so the regulation goes on with the other outputs Running hours of loads 13 1 How to display the running hours of a load The controller memorizes the running hours of each load To see how long a load has been working follow this procedure 1 Press and releas...

Page 19: ...again the o or SET key the next alarm is displayed Alarms erasing 1 Enter the Alarm Menu 2 To erase the displayed alarm push the SET key till the rSt label will be displayed in the Lower Display NOTE The running alarms cannot be erased 3 To erase the whole Alarm Menu hold pressed the SET key for 10 seconds KEYBOARD LOCKING 15 1 How to lock the keyboard 1 Keep the o and n keys pressed together for ...

Page 20: ...TE The message Err is displayed for failed programming In this case turn the unit off and then on if you want to restart the download again or remove the Hot key to abort the operation The unit can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the Hot Key and vice versa LIST OF PARAMETERS 17 1 Plant dimensioning and type of regulation The EC2 XC645CX is pre set to drive ...

Page 21: ...oAi NOTE COMPRESSOR WITH STEPS CONFIGURATION the output of compressor has to be set before the output of the step ES Compressor with 1 step oA2 cPr1 oA3 StP If an oAi set as step without any previous oAi set as cPr the configuration alarm CStP will be activated PLANT CONFIGURATION EXEMPLES Plant with 2 compressors one of them digital e 2 fans oA1 dgS oA2 CPr1 oA3 FAn oA4 FAn oA6 nu Plant with 4 co...

Page 22: ...94 120 F 290 R290 Propane 50 60 C 58 120 F 448 R448A 45 60 C 69 120 F 449 R449A 45 60 C 69 120 F 450 R450A 45 60 C 69 120 F 452 R452A 45 60 C 69 120 F 513 R513 45 60 C 69 120 F 1234 R1234ze 18 50 C 0 122 F Sty Compressors rotation enabling YES rotation enabled this algorithm distributes the working time between the various compressors to ensure even run times no fixed sequence the compressors are ...

Page 23: ... 2 nP not used Cur 4 20 mA pressure transducer use term 6 7 in 10 gnd tEn 0 5 4 5 V ratiometric pressure transducer use term 4 7 in 10 gnd ntc NTC 10 K probe use term 4 7 FA04 Adjustment of read out for the Probe 2 used only if Pbc2 Cur or tEn corresponding to 4 mA or 0 5 V input signal given by the delivery probe 1 0 FA20 bar 15 FA20 PSI 100 FA20 kPA FA20 Adjustment of read out for the Probe 2 co...

Page 24: ...n LL liquid level alarm SIL to enable the silence function EAL generic external alarm it doesn t affect the regulation Co1 running proof function for load 1 term 15 17 Co2 running proof function for load 2 term 16 17 Co3 running proof function for load 3 term 17 18 Co4 running proof function for load 4 term 17 20 Co6 running proof function for load 6 term 21 22 NOTE Also the following values oA5 C...

Page 25: ...put set as oA4 or Co4 activation delay 0 255 s This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F is set as oA4 or Co4 d5d Digital input set as oA5 or Co6 activation delay 0 255 s This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F is set as oA5 or Co6 did Liquid level alarm signaling delay enabled only if one digital input is set as LL 0 255 ...

Page 26: ...mand when the digital compressor is unavailable yES the digital compressor is always started as first If unavailable due to safety timers the regulation will be locked till timers will be over SUt Start up time The digital scroll valve is energized for the SUt when the compressor starts 0 3 s tdS Digital scroll cycle time 10 40 s it sets the cycle time for the digital scroll DGS valve modulation P...

Page 27: ...t sets the maximum acceptable value for set point 17 6 Liquid injection thermostat Lit Set point C for cooling injection thermostat 0 150 C The reference probe is the P3 the thermostat relay is given by the relay set as oAi Lin Lid Differential for cooling injection thermostat 0 1 10 0 The reference probe is set by LiPr parameter LiPr Probe for cooling injection thermostat nP function disabled P3 ...

Page 28: ...after that the A14 maintenance call is generated PEn Low pressure switch intervention numbers 0 15 If the low pressure switch is enabled PEn times in the PEI interval the controller is locked Only the manually unlocking is possible See also the alarms table at paragraph 20 Every time the pressure switch is enabled all the compressor are turned off PEI Pressure switch interventions time 0 15 min In...

Page 29: ...fferential for low superheat pre alarm 0 1 30 0 C 1 60 F The low superheat pre alarm warning is sent when the superheat SH is lower than ASH2 low superheat alarm threshold ASH0 possibly after the ASH1 delay ASH1 Delay for signalling low superheat pre alarm 0 255 s If the superheat is below the ASH2 ASH0 threshold for ASH1 time the low superheat pre alarm warning is sent ASH2 Low suction superheat ...

Page 30: ...r compressors if available are allowed to start when the inverter compressor is locked by safety timers This allows the system to satisfy the cooling demand when the inverter compressor is unavailable yES the inverter compressor is always started as first If unavailable due to safety timers the regulation will be locked till timers will be over AOP Probe for analog output It is used only if AOP Fr...

Page 31: ... Maximum variation per minute for analog output 2 nu 1 100 nu not used function disabled 1 100 it sets the maximum percentage variation per minute of the analog output 2SAO Percentage of analog output 2 in case of probe failure 0 100 2AOH Maximum analog output 2 percentage when silence mode function is enabled 0 100 17 15 Other tbA Alarm relay silencing by pushing one of the keypad buttons No alar...

Page 32: ...18 1 Digital Compressor regulation Digital scroll main parameters set up EG Plant with 2 compressors one of them digital e 2 fans default configuration with PP11 PP30 pressure transducers oA1 dGS oA2 CPr1 oA3 FAn oA4 FAn dGty SCrL The pressure is adjusted by a PI regulation 24VAC 24V ...

Page 33: ... after the ton delay time d Then if additional capacity is required pressure higher than SET Pbd 2 another compressor starts after the don time NOTE If the pressure exceeds the value SET Pbd 2 and the DGS compressor is not available blocked by onon oFon safety digital input another compressor is started if available in order to meet the adjustment request Decreasing capacity and regulation stop a ...

Page 34: ...et up EG Plant with 2 compressors Stream 6D and 2 fans default configuration with PP11 PP30 pressure transducers oA1 dGS oA2 6dG oA3 FAn oA4 FAn dGty StrM The pressure is adjusted by a PI regulation following the same logic of the digital scroll see previous paragraphs 18 1 2 and 18 1 3 24VAC 24V ...

Page 35: ...s PM In percentage it sets the minimum capacity of the DGS activation during a period tdS For instance with tdS 20 s and PM 20 the minimum activation of the DGS is 4 s NOTE For digital scroll dGty SCrL the minimum allowed value of PM is 10 For digital stream dGty StrM the minimum allowed value of PM is 0 NOTE For a proper functioning of the DGS it s recommended a minimum activation time of 2 secon...

Page 36: ...nal brings near the set point In this way if the pressure is greater than regulation band all the fans are on if the pressure temperature is lower than the regulation band all the fans are off Naturally also for this regulation all the delays Fon and FoF are valid Regulation according to the running hours The algorithm switches on and off the loads according to the running hours of each load In th...

Page 37: ...ter of ECI fan of chopped phase driver that with this input a proper output is supplied to the fan AOt 5 Time of analog output at max after the start To start the fan the controller supplies 10 V output for 5 s then starts standard regulation MPM 100 Maximum variation per minute The analog output takes 1 min to move from the min to the maximum How to set it Parameters involved oA i inF AoC tEn AoP...

Page 38: ...imum value for analog output The minimum voltage is 0 V NOTE Verify on the inverter of ECI fan of chopped phase driver that with this input a proper output is supplied to the fan AOt 5 Time of analog output at max after the start With AOt 5 the controller supplies 10 V output for 5 s at fan start then starts standard regulation MPM 100 Maximum variation per minute The analog output takes 1 min to ...

Page 39: ...1 Co6 has not been activated by d1d d46 time The compressor 1 6 is switched off and the safety timers start Automatic when safety timers are over LC01 LC06 Running proof alarm with manual recover 5 running proof alarms happened in an hour The compressor 1 4 is switched off Manual by means Controller off on Reset by keyboard Reset by monitoring system Example EI Rack with 2 compressors with compres...

Page 40: ...lectors The relay will be disabled once the compressors can restart see scheme To enable this function set one relay by the parameters oA2 or oA3 or oA4 or oA5 or oA6 as flood protection EI oA4 Liq and then connect it to the external device that blocks the cabinet injection NOTE The relay set as flood protection is automatically activated even when the controller is in stand by mode If the compres...

Page 41: ...eat using the value of the suction probe P1 and the probe set in the parameter ASH9 The SH is available after 1 minute since at least one compressor is running Low superheat signalling and actions Controller can signal low superheat pre alarm only warning and low superheat alarm warning and regulation according to parameter ASH4 The alarm messages and the regulation are described in the following ...

Page 42: ... none probe set as SH probe and one relays set as HGi valve for hot gas injection the configuration error is displayed no Probe For SH and the relay set as HGi is never activated b If the probe used to calculate the SH is in error the related probe fault alarm is generated P3 or P4 and the HGi relay is not activated ALARM LIST Usually alarm conditions are signaled by means of 1 Activation of alarm...

Page 43: ...GuLAtion None oA i is set as compressors or fans Check the setting of oA2 oA3 oA4 oA6 parameters AOP2 P2 probe not available for the 4 20 mA output P2 probe not available P2P no Enable the probe setting P2P yES The second probe P2 is used to control the temperature of the engine of screw compressors Check CtyP and set it different from Scr no FAn ProbE P2 probe not available for fan regulation P2 ...

Page 44: ...operating mode when the input is disabled If there are PEn activation in the PEi time only manual resetting is allowed by pressing the DOWN key for 3 seconds or by turning off and on the instrument High pressure every time the inputs are activated all the compressors are switched off and fans are switched on The instrument restarts the standard operating mode when the input is disabled If there ar...

Page 45: ...alarm condition and alarm signaling ACTION The alarm is signaled with standard action The outputs are unchanged 20 2 Buzzer muting Press any buttons to silence the buzzer during an alarm condition Hold pressed for more than 3 seconds switch off the alarm relay during an alarm condition 20 3 Alarm conditions summary table CODE MEANING CAUSE ACTION RESET EI1L Low electronic pressure switch alarm Pre...

Page 46: ...rm Probe 4 failure or out of range The functions related to the fourth probe are disabled Automatically as soon as the probe restarts working EA1 EA2 EA3 EA4 EA6 Load safeties alarm Safeties compressor fan input activation NOTE with step compressors 1 input for each compressor has to be used The corresponding load is turned off with step compressors all relays referred to the input are disabled Re...

Page 47: ...lly as soon as the temperature becomes lower than dtL InF Inverter fan alarm The configurable dig Input set as inF is activated The analog out set as INF is switched off Automatically as soon as the input is disabled FC01 FC04 Running proof alarm with automatic recover The digital input set as Co1 Co6 has not been activated by d1d d4d time The compressor 1 4 is switched off and the safety timers s...

Page 48: ... temperature 10 60 C Shipping and storage temperature 25 60 C Relative humidity 20 85 no condensing Measuring range NTC probe 40 110 C Resolution 0 1 C 1 F 0 1 bar 1 PSI Accuracy ambient temp 25 C 0 7 C 1 digit Power absorption 5 VA max Inputs up to 4 NTC probes or up to 3x 4 20 mA or up to 0 5 4 5 VDC transducer Digital inputs 7 free voltage Max distance 10 m Relay outputs 4 relay SPST Rating acc...

Page 49: ...CL FtyP r448 Pr2 Refrigerant gas type r22 R22 134 R134 404 R404A 407A R407A 407C R407C 407F R407F 410 R410 507 R507 CO2 R744 CO2 r32 R32 290 R290 448 R448A 449 R449A 450 R450A 452 R452A 513 R513 1234 R1234ze Sty YES Pr2 Compressor Sequence type no yES rot YES Pr2 Fan Sequence type no yES P1C Cur Pr2 P1 probe setting 4 20 mA 0 5 V ntc nP Cur tEn ntc PA04 0 5 Pr2 4 mA or 0 5 V readout for P1 probe 1...

Page 50: ...S OFF LL SIL EAL Co1 Co2 Co3 Co4 Co5 Co6 iF04 OA4 Pr2 Function 4 configurable digital input Nu OA1 OA2 OA3 OA4 OA5 OA6 InF LP1 LP2 HP ES OFF LL SIL EAL Co1 Co2 Co3 Co4 Co5 Co6 iF05 LP1 Pr2 Function 5 configurable digital input Nu OA1 OA2 OA3 OA4 OA5 OA6 InF LP1 LP2 HP ES OFF LL SIL EAL Co1 Co2 Co3 Co4 Co5 Co6 iF06 HP Pr2 Function 6 configurable digital input Nu OA1 OA2 OA3 OA4 OA5 OA6 InF LP1 LP2 ...

Page 51: ... band for compressors regulation suction 1 0 1 30 0 C 1 50 F 0 1 10 0 bar 1 150 PSI 10 1000 kPa rS 0 0 Pr2 Band offset suction 1 12 0 12 0 C 20 20 F 12 0 12 0 bar 200 200 PSI 999 999 kPa inC 500 Pr2 Integral time suction 1 0 999 s dGSP no Pr2 Digital compressor always activated as first compressor no yES SUt 2 Pr2 Digital input valve on at start up 0 3 s tdS 15 Pr2 Cycle time for digital compresso...

Page 52: ...PSI 10 1000 kPa ESF 0 0 Pr2 Energy saving differential for fan regulation 50 0 50 0 C 90 90 F 20 0 20 0 bar 300 300 PSI 2000 2000 kPa PbES 0 0 Pr2 Band offset for fan regulation in ES 50 0 50 0 C 90 90 F 20 0 20 0 bar 300 300 PSI 2000 2000 kPa Fon 30 Pr2 Time delay between the insertion of two different fan 0 255 s FoF 15 Pr2 Time delay between switching off of two different fan 0 255 s LSF 10 0 P...

Page 53: ... probe 0 6 ASH0 5 0 Pr2 Differential for superheat warning 1 0 1 30 0 C 1 60 F ASH1 240 Pr2 Superheat warning delay 0 255 s ASH2 3 0 Pr2 Superheat suction alarm 1 set 0 1 15 0 C 1 30 F ASH3 120 Pr2 Superheat suction alarm 1 delay 0 255 s ASH4 no Pr2 Compressors turning off for suction Superheat alarm 1 no yES ASH5 5 0 Pr2 Differential for regulation restart for suction Superheat alarm 1 0 1 15 0 C...

Page 54: ... 2 2LAO 0 0 0 0 Lower limit 2 analogue output AOF FREE 50 0 150 0 C 58 302 F 2UAO 100 0 100 0 Upper limit 2 analogue output AOF FREE 50 0 150 0 C 58 302 F 2AOM 0 0 Minimum value of analogue output 2 0 100 2AOt 0 0 Time with analogue output 2 at max when after exceeding AOM 0 15 s 2MPM 100 100 Maximum variation per minute analogue output 2 nu 1 100 2SAO 50 50 Percentage of analogue output 2 in case...

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