dixell xc440c Instruction Manual

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Electronic Controller for

Compressor Racks

XC440C

Instructions Manual

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Operating instructions cod. 1592001300

INDEX

1. GENERAL WARNING 4

LEASE READ BEFORE USING THIS MANUAL

AFETY PRECAUTIONS

2. GENERAL DESCRIPTION 4

4 4

3. FIRST INSTALLATION 5

3.1 H

3.2 H

3.3 H

OW TO SET THE KIND OF GAS OW TO SET THE RANGE OF THE PRESSURE PROBES OW TO SET THE KIND OF DISPLAY: RELATIVE OR ABSOLUTE PRESSURE

4. USER INTERFACE 7

4.1 D

4.2 K

4.3 THE ICONS 8

ISPLAYING EYBOARD

5. HOW TO SEE AND MODIFY THE SET POINT 8

5.1 H

5.2 H

OW TO SEE THE SET POINT OF COMPRESSORS OR FANS OW TO MODIFY THE SET POINT OF COMPRESSORS OR FANS

6. PARAMETERS PROGRAMMING 9

6.1 H

6.2 H

6.3 H

OW TO ENTER THE “PR OW TO ENTER IN PARAMETERS LIST “PR OW TO CHANGE PARAMETER VALUES

PARAMETER LIST

1”

2” 9

7. HOW TO DISABLED AN OUTPUT 10

7.1 H

7.2 O

7.3 R

OW TO DISABLED AN OUTPUT DURING A MAINTENANCE SESSION UTPUT DISABLED SIGNALLING EGULATION WITH SOME OUTPUTS DISABLED

.10

8. RUNNING HOURS OF LOADS 10

8.1 H

8.2 H

OW TO DISPLAY THE RUNNING HOURS OF A LOAD OW TO RESET THE RUNNING HOURS OF A LOAD

.10

.11

5 5 6

7 7

8 8

9 9

9. ALARM MENU 11

9.1 H

OW TO SEE THE ALARMS

10. USE OF THE PROGRAMMING “HOT KEY “ 12

10.1 H

10.2 H

OW TO PROGRAM A HOT KEY FROM THE INSTRUMENT OW TO PROGRAM AN INSTRUMENT USING A HOT KEY

(UPLOAD) 12

(DOWNLOAD) 12

11. KEYBOARD LOCKING 12

11.1 H

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OW TO LOCK THE KEYBOARD

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Operating instructions cod. 1592001300

11.2 T

O UNLOCK THE KEYBOARD

12. LIST OF PARAMETERS 13

12.1 P

12.2 P

12.3 O

12.4 D

12.5 C

12.6 F

12.7 A

12.8 A

12.9 O

LANT DIMENSIONING AND TYPE OF REGULATION ROBES CONFIGURATION

THERS INPUTS CONFIGURATION ISPLAY AND MEASUREMENT UNIT

OMPRESSORS REGULATION ANS REGULATION LARMS – COMPRESSOR SECTION LARMS – FANS SECTION

THER

.13

14 14 15 15 16 16 16 17

13. TYPE OF REGULATION 18

13.1 D

13.2 P

EAD BAND ROPORTIONAL BAND – FOR COMPRESSORS OR FANS

NLY FOR COMPRESSORS

– O

18 19

14. MOUNTING & INSTALLATION 20

15. ELECTRICAL CONNECTIONS 21

15.1 P

ROBES CONNECTION

16. RS485 SERIAL LINK 21

17. TECHNICAL FEATURES 22

18. ALARM LIST 22

18.1 T

18.2 A

18.3 A

YPES OF ALARMS AND SIGNALLING MANAGED LARM MUTING LARM CONDITIONS – SUMMARY TABLE

22 24 24

19. WIRING CONNECTIONS 25

20. DEFAULT VALUE 26

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Operating instructions cod. 1592001300

1. General warning

1.1 Please read before using this manual

•

This manual is part of t he product and should be kept near the i nstrument for easy and

quick reference.

•

The inst rument shall not be used for purposes dif ferent from thos e described hereunder. It

cannot be used as a safety devic e.

•

Check the application li mits before proceeding.

1.2

•

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 atm ospheric hum idity to prevent formati on of condensation

•

Warning: disconnect all electrical c onnections before any kind of mai nt enance.

•

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 det ai l ed description of the fault.

•

Consider the maximum current which can be applied to each relay (see Techni c al Data).

•

Ensure that the wires for probes, loads and the power supply are s eparated and f ar enough

from each other, without c ros sing or intertwining.

•

Fit the probe where it is not acces sible by the end user.

•

In case of applications in industrial environments, t he use of m ains f ilters (our mod. FT1) in

parallel with inductive loads coul d be useful.

Safety Precautions

2. General description

The XC440C is designed to manage compressors or fans in a c ondensing system such as a pack. The compressors can be s i mple, multist age or with di fferent capacities. Control is by means of a neutral zone or proportional band and is based on the pres sure or temperature sensed in the LP suction (compressors) or HP (condenser) circuits. A special algorithm balances the run hours of the compressors to distribute the work load uniformly. The controllers can convert pres sure and display it as temperat ure. The front panel offers com plete 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 act i vat ed. By means of the HOT KEY the controller can be eas y programmed at power on. The controller can be connected to the XJ500, controlling and monitoring system , thank s to the serial TTL output, using the standard ModBus RTU protocol.

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Operating instructions cod. 1592001300

3. First installation

At first inst al l at i on, it’s necessary the fol l owing:

1. Select the kind of gas.

2. Set the range of the pressure probes.

In the following paragraph a short cut f or t he above operations. Chapters operations.

6 Parameters programming

12 List of parameters

and

will explain in detail these

3.1 How t o set t he kind of gas

The controller has mem ori sed the relation between temperature and press ure for some gases.

The pre-set gases is: r404.

If another gas is used, act as in the following:

R507

Set

; 134=

1. Enter the Programmi ng mode by pressing the

2. Select the “

3. Select the

4. Press the “

5. Use “UP” or “ following:

6. Press “

To exit

: Press

NOTE

: the set value is st ored even when the procedure is exited by waiting the tim e-out to

expire.

Pr2

” parameter. Then enter the pass word 3 –2 1.

FtyP, kind of gas,

SET

” key: the value of the parameter will start blinking.

DOWN

r22=

SET

” to store the new value and move to the f ol l owing parameter.

SET + UP

” to change the gas amount t he following: . S elect t he gas am ong the

; r404=

R22

or wait 30s without pressing a key.

parameter.

R404A

; 507=

and

134

DOWN

; r717=

key for 3s.

ammonia.

3.2 How t o set t he range of the pressure probes

According to the part number a controller is pre-set to work with the f ol l owing pressure probes:

XC440C – xxxxA XC440C – xxxxB:

XC440C – xxxxE

, or

PP30: 0÷30 bar (0÷435PSI) - relative pressure

: PP11: -0.5÷11 bar (-7÷160 PSI) - relative pressure;

If the probes you’re using have a different range act as in the following: To set the pressure range of the

PA04: Adjustment of read out corresponding to 4mA PA20

Adjustment of read out corresponding to 20mA

Practically these parameters has to be set with the s t art and end scale of the probe range.

WARNING:

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set a value correspondent to

E.I. PP11 PP30

relative pressure transducer, range -0.5÷11.0 bar. PA04=0.50; PA20=12.00.

relative pressure transducer, range: 0÷30bar. PA04=1.00; PA20=31.00.

Probe

use the parameters:

absolute pressure

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How to do:

1. Enter the Programmi ng mode by pressing the

2. Select the “

3. Select the

4. Press the “

5. Set the lower value of the probe range (lower value +1 if the probe detects relative pressure).

6. Push the

corresponding to 20mA

7. Set the higher value of the range (higher value +1 if the probe detects relative press ure).

8. Push the

Pr2

” parameter. Then enter the pass word 3 –2 1.

PA04, adjustment of read out corresponding to 4mA,

SET

” key: the value of the parameter will start blinking.

SET

key to confirm the value. The

SET

key to confirm the value. Next parameter will be displayed.

Operating instructions cod. 1592001300

Set

parameter will be displayed.

DOWN

and

PA20: adjustment of read out

key for 3s.

parameter.

Do the same things for the Probe 2,

FA04, FA20

parameters

3.3 How t o set t he kind of display: relative or absolute pressure

After setting the probe range by m eans of the PA04, PA20 param eters, it ’s pos sible to select if the absolute or relative pressure has to be displayed.

The controller is pre-set for RELATIVE PRESSURE displaying.

absolute pressure

If the

9. Enter the Programmi ng mode by pressing the

10. Select the “

1. Select by pushing the

2. Push the

3. Set the

To exit

: Press

Pr2

SET

AbS

SET + UP

has to be displayed, act as i n the following:

Set

” parameter. Then enter the pass word 3 –2 - 1.

to modify the value.

value and push the

key the

or wait 30s without pressing a key.

rELP

parameter.

SET

key to confirm it.

and

DOWN

key for 3s.

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4. User interface

4.1 Displaying

Operating instructions cod. 1592001300

UPPER DISPLAY LOWER DISP LAY ICONS

Temperature Pressure

Working loads

Measurement unit

Alarm or status Icons

4.2 Keyboard

SET

To see or modify the set point. in program ming m ode it sel ects a param eter or confirm an operation.

Alarm menu:

(UP) To enter the Alarm menu.

In programming mode: it browses the parameter codes or increases the displayed value. With Hot key inserted: it starts t he Hot key programming procedure.

(DOWN) In programming mode: it browses the parameter codes or decreases the

displayed value. Manual restart of loads: By holding i t pressed for 3s, it switches on agai n l oads previous locked by a safety digi tal input alarm.

CLOCK To display the loads running hours.

By holding it pressed for 3s t he Maintaining menu is entered.

KEY COMBINATIONS

SET + SET +

To lock and unlock the keyboard.

To enter the programming mode.

8 9

To exit the programming mode.

By holding it pressed for

3s,

the current alarm is eras ed.

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Operating instructions cod. 1592001300

4.3 THE ICONS

LED FUNCTION MEANING

ON Celsius degrees ON Fahrenheit degrees ON bar displaying

bar

ON PSI displaying

PSI

ON Load 1 on Flashing Load 1 is waiting to start (1HZ). or digital input alarm for Load 1 (2Hz).

ON Load 2 on Flashing Load 2 is waiting to start (1HZ). or digital input alarm for Load 2 (2Hz).

ON Load 3 on Flashing Load 3 is waiting to start (1HZ). or digital input alarm for Load 3 (2Hz).

ON Load 4 on Flashing Load 4 is waiting to start (1HZ). or digital input alarm for Load 4 (2Hz).

ON The Maintenance menu has been entered Flashing One or more loads have been placed in maintenance stat us ON Alarm is happening ON All the stored alarms have been seen

Flashing A new alarm has happened.

o Load 1 in maintenance status (2Hz).

o Load 2 in maintenance status (2Hz).

o Load 3 in maintenance status (2Hz).

o Load 4 in maintenance status (2Hz).

5. How to see and modify the set point

5.1 How t o see t he set point of compressors or fans

If the controller can m anage compressors or fans, the set point are displayed in sequence, otherwise only the set point of the enabled sect ion will be displayed.

1) Push and rel ease the

2) The Lower display will show the

SET

key;

“SEtC”

label for compress or/

“SEtF”

for fans, will the Upper display will show its value.

To exit:

push the

SET key

or wait for 30 without pressing any keys .

5.2 How t o modi f y the set point of compressors or fans

WARNING: before setting the target set points for the first time, check and, if necessary, modify the type of freon (par. FtyP) and the default unit of measurement (par. dEU) for compressors and fans

PROCEDURE

1. Set the kind of freon by means of the FtyP parameter (see 3.1

)

gas

2. Set the measurem ent uni t (dEU par.).

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How to set the kind of

label

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3. Check and if necessary modify the set point limits (LSE and HSE par.).

Operating instructions cod. 1592001300

1. Push the

2. The Lower display will show the for fans, will the Upper display will show its value flashing.

3. To change the Set value push the

4. To memorise the new value and pass to the normal display push the SET key.

To exit: push the SET key or wait for 30 without pressing any keys.

SET

key for more than 2 sec onds;

“SEtC”

label for compress or/

within 30s.

“SEtF”

label

6. Parameters programming

6.1 How to ent er t he “Pr1” paramet er l i st

To enter the “Pr1” parameter lis t , user accessible, operate as follows:

1. Hold pressed the SET and DOWN key for 3s.

2. The controller displays the name of the parameter in the Lower display, its

value on the Upper display.

3. Press the “SET” key: the value of the parameter will start blinking.

4. Use “UP” or “DOWN” to change the value.

5. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 30s without pressing a key.

NOTE: the set value is st ored even when the procedure is exited by waiting the tim e-out to

expire.

6.2 How to ent er i n paramet ers l i st “Pr2”

The “Pr2” parameter list is protected by a security code (Password).

SECURITY CODE is 321

To access parameters i n “ Pr2”:

1. E nter the “Pr1” level.

2. S el ec t “Pr2” parameter and press the “SET” key.

3. The flashing value “0 --” is displayed.

4. Use

5. Repeat operat i ons 2 and 3 for the other digits.

NOTE: each parameter in “Pr2” can be removed or put into “Pr1” (user level) by pressing “SET” +

to input the security code and confirm the figure by pressi ng “SET” key.

. When a paramet er i s present also in “Pr1” decim al poi nt of the lower display is on.

6.3 How t o change paramet er values

1. Enter the Programming mode.

2. Select the required parameter with

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Operating instructions cod. 1592001300

3. Press the “

4. Use

5. Press “

To exit

NOTE

out.

SET

” key the value start blinking.

to change its value.

SET

” to store the new value and move to the f ol l owing parameter.

SET + UP

: Press

: the new programming is st ored even when the procedure is exited by waiting the t ime-

or wait 15s without pressing a key.

7. How to disabled an output

To disabled an output during a maintenance session means to exclude t he output from the regulation.

7.1 How t o di sabled an output during a maintenance session.

1. Push the

2. The LED’s of the first output is switched on, the Lower displa shows the “

if the first output i s enabled, or the

section. With compres sor with more steps all the LED’s linked to the c ompressor and the valves are switched on..

3. Select the output by pressing the UP or

To modify the status of the output

4. flashing, then push the UP or DOWN to pass from “On” to “

5. Push the

To exit:

SET

push the

key to confirm the status and pass to the next output. .

CLOCK

key or wait 30 sec

CLOCK

key for 3s.

StA

” label, while the Upper display shows the “On” label

“oFF”

label if the output is dis abled f or a m aint enance

DOWN

key.

: push the

SET

key, the status of the output starts

OFF

” and viceversa.

7.2 Output disabled signalling.

If an output is disabled i ts led blinks (2 Hz)

7.3 Regulation with some outputs disabled.

If some outputs are disabled they don’t take part to the regulat ion, so the regulation goes on with the other outputs.

8. Running hours of loads

8.1 How t o di splay the running hours of a load.

The controller memori s es the running hours of each load.

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To see how long a load has been working follow this procedure:

1. Press and release the “CLOCK” k e y.

2. The led of the first output is switched on, the

“HUr”

the running hours of the first out put .

label, while the

Lower Display

Upper Display

shows the shows the

shows

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Operating instructions cod. 1592001300

3. To see the running hours of the following load pres s the UP key .

To exit:

push the

CLOCK

key or wait 30 sec

8.2 How t o reset t he running hours of a load.

1. Display the running hour according to t he above procedure.

2. Select the load by press i ng the UP key.

3. Push the

4. Hold pushed the key for some seconds till the

display shows zero.

To exit:

NOTE:

the selected loads..

SET

push the

SET

if the

key (immediat el y on the lower display the

CLOCK

key is released within 2s, the controller reverts to display the running hours of

key or wait 30 sec

rSt

“rSt”

label is displayed).

label starts flashi ng and the Lower

9. Alarm Menu

The controller memori s es the last 20 alarms happened, together with their duration.. To see the alarm codes see par.

9.1 How t o see t he al arms

1. Push the

2. The last alarm happened is s howed on the Upper display, while

3. Push again the

4. To see the alarm

5. By pushing again the

duration

par. 18 Alarm list

key the lower display shows its number. from the most recent.

and push the

or SET

key and the other alarm are displayed starting

SET

key.

key the next alarm is dis pl a yed.

Alarms erasing.

Enter the Alarm Menu.

To erase the displayed alarm pus h the “

Lower Display,

the running alarms cannot be eras ed..

NOTE

To erase the whole Alarm Menu, hold pressed t he “

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” key till the “rSt” label will be displayed in the

SET

” key for 10s.

SET

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Operating instructions cod. 1592001300

10. Use of the programming “HOT KEY “

10.1 How t o program a hot key from the instrument (UPLOAD)

1. Program one controller with the f ront keypad.

2. When the controller is ON, insert the “ appears followed a by flashing

3. Push “

4. Turn OFF the instrument rem ove t he

SET”

key and the

“End”

End

will stop flashing.

Hot key

“Hot Key”,

” and push

then turn it ON again.

key; the

"uPL"

message

NOTE

you want to restart the upload again or remove the “

: the “

Err

” message is displ ayed for f ailed program m ing. In t his cas e push again

Hot key

” to abort the operation.

key if

10.2 How t o program an i nst rument using a hot key

(DOWNLOAD)

1. Turn OFF the instrument.

2. Ins ert a ON.

3. Automatically the parameter list of the memory, the “

4. After 10 seconds the instrument will restart working with the new parameters.

5. Remove the

NOTE

then on if you want to restart the download again or remove the “ operation. The unit can UPLOAD or DOWNLOAD the parameter list f rom its own E2 internal mem ory to

“Hot Key”

the

programmed “Hot Key” into the 5 PIN receptacle

doL

“Hot Key”.

the message “

and vice-versa.

” message is blink i ng f ol l owed a by flashing

Err

” is displayed for failed program ming. I n this cas e turn the unit off and

“Hot Key”

and then turn the Controller

is downloaded into the Controller

“End”.

Hot key

” to abort the

11. Keyboard locking

11.1 How t o l ock t he keyboard

1. Keep the and

2. The “POF” messa

this point it is onl menu.

keys.

and

s pressed together for more than 3 s the

e will be displayed and the keyboard is locked. At

possible to view the set point or enter t he HACCP

11.2 To unlock the keyboard

Keep the appears.

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

and

keys pressed together for more t han 3s till the “

POn”

flashing message

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Operating instructions cod. 1592001300

12. List of parameters

12.1 Plant dimensioni ng and t ype of regulati on.

oA1, oA2, oA3, oA4 Outputs 1- 4 configuration

be dimensioned according to the number and type of compressors or fans and the number of steps for eac h one.

Each relay according to the c onfiguration of the oA(i) parameter can work as:

Compressor

Step:

Fan:

oAi = FAn

Alarm: Not used: NOTE:

According to the oA1÷oA4 configurat i on, 2 kinds of plant can be defined:

Rack with compressors only: Rack with fans only:

: oAi = cPr,

oAi = StP

oAi = ALr

oAi = nu

also the “Lin” value is present. This val ue

all the oAi different from FAn

all the oAi different f rom CPr of StP

: by means of these param eters t he plant c an

must not

be used..

WARNING: It’s not allowed to configure a plant with both compressors and fans

COMPRESSORS CONFIGURATION

step compressors

With step.

ES. C

ompressor with 3 steps:

the output of compressor has to be set before the output of the

oA1 = cPr, oA2= StP, oA2 = StP.

If an oAi set as step without any previous oAi set as cPr the configuration alarm “CStP” will be activated.

If compressor with different capacities are used configured as

cPr

(compressor) otherwise the

(CtyP=dPo)

, all the oAi must to be

configuration alarm “CStP” will be

activated.

RACK WITH FANS ONLY

If the controller is used for fans, all the oAi must be set as FAn or “nu” not used

CtyP:Compressor type

not.

dPo = compressor with different capacities StP

homogeneous

Scr = don’t set it

StP: valve outputs polarity:

of the relays associated with the c apacity valves (only for homogeneous and steppedcapacity compressors):

=valve enabled with open contact;

PC1 ..PC4 Power of compressor 1...4

only if CtyP=dPo. The power is identified by a value (range 1÷255) proportional to the capacity of single compressor.

: it selects if the compress ors have the s ame power (homogeneous ) or

: in this case the regulation is neutral zone.

: the regulation can be neutral zone or proporti onal band.

polarity of the outputs for capacity valves. It determ ines the st ate

= valve enabled with closed contact.

: for setting the power of single compress ors. Avail able

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E.I.

3 compressors with foll owing capaci ty: 10, 20, 40 HP. The param et ers have t o be s et

in these way: PC1=10, PC2=20, PC3=40.

FtyP:Freon Type

r22

= R22;

rty:Type of regulation (see par. 13 Type of regulation)

= neutral zone,

Sty Compressor rotation

YES

ensure even run times.

= fixed sequence: the compres sors are enabled and disabl ed in fixed sequence: first ,

second etc.

rot Fans rotation

YES

ensure even run times.

= fixed sequence: the compres sors are enabled and disabl ed in fixed sequence: first ,

second etc.

: set the kind of freon used in the plant

r404

= R404A ;

= rotation: this algorit hm distributes the working time between the various loads to

Operating instructions cod. 1592001300

507

= R507;

= proportional band.

134

=134;

r717

=r717 (ammonia)

12.2 Probes configuration

12.2.1 Probe configuration

Pbc: Probe 1 setting. Cur = PA04: Adjustment of read out for the Probe 1

input signal, given by the suc tion probe (0 ÷31 bar or 0÷450 PSI or 0÷3100KPA)

Warning:

relative pressure increase the range of 1 bar. See also par.

E.I. PP11

PA20=12.0 (11+1).

PP30

PA20

Adjustment of read out for the Probe 1

the suction probe (0 ÷ 31.0 bar or 0÷450 PSI or 0÷3100KPA))

PA04

CAL: Probe 1 calibration

set a value correspondent to absol ute pressure. If the transducer m easures

3.2 How to set the range of the pressure probes

relative pressure transducer, range -0.5÷12.0 bar. PA04=0.5 (-0.5+1);

relative pressure transducer, range: 0÷30bar. PA04=1; PA20=31.

4 ÷ 20 mA probe;

(-12.0÷12.0 bar; -12.0÷12.0°C or -20÷20 PSI/°F)

ntc =

NTC probe,

(used only if Pbc=Cur). c orrespondi ng to

corresponding to

Ptc =

20mA

SEE THE WARNING FOR

NTC probe.

4mA

input signal, given by

12.3 Others inputs configuration

i1c Configurable digital input polarity

oP:

the digital input is activated by opening the contact;

CL:

the digital input is activated by closing the contac t.

i1F Configurable digital input polarity functions

ES = E

did Configurable digital input delay: ( ALIP: Alarm input for compressors and fans polarity

oP: CL:

ALMr Manual reset of alarms for compressors and fans.

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

nergy saving;

the digital input is activated by opening the contact; the digital input is activated by closing the contac t.

oFF

= instrument shut down;

(terminals 3-4)

enabled only if i1F=LL) 0÷255min

(terminals 3 - 4)

LLi =

liquid level alarm

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= automatic recover of alarm: regulation res tart when the corres pondent digit al input is

disabled

yES =

manual recover for the alarm s of compressors and fans See also par

Operating instructions cod. 1592001300

12.4 Display and Measurement unit

dEU:Default measurement unit for displaying (bar

NOTE1: T

following parameters:

LAF, HAF. NOTE2:

parameters

HAF

in the measurement unit set in dEU parameter. In any case after modifying this parameter it’s better check and modify if necessary the set point and the above parameters.

rES Resolution for °C and bar (in = rELP Pressure displaying: AbS

rEL

= relative pressure.

NOTE:

LSE HSE, LSF and HSF are automatically decreased by 1.0 bar or 14 PS I

dEU

parameter sets the m easurement unit also for the

The controller automatically converts values of set point and following

CAL, FCAL, Pbd, ESC, LSE, HSE, Pb, ESF, LSF, HSF, LAL, HA, LAF,

In this case the press ure displayed, the set point and the following paramet ers

CAL, FCAL, Pbd, ESC, LSE, HSE, Pb, ESF, LSF, HSF, LAL, HA,

integer;

= absolute pressure;

dE =

decimal point)

=bar; °C=°C,

PSI

=PSI; °F=°F)

set point

and the

12.5 Compressors regulation

Pbd:Proportional band or neutral zone width

The band (or zone) is symmetrical compared to the target set point, with extremes: set+Pbd/2 ... set-Pbd/2. The measurement unit depends on the dEU par.

ESC Energy saving value for compressors:

compressor set point.

onon: Minimum time between 2 following switching ON of the same compressor

(0÷255 min).

oFon: Minimum time between the switching off of a compressor and the following

switching on

don: Time delay between the insertion of two different compressors doF: Time delay between switching off of two different compressors

10s)

donF: Minimum time a stage stays switched ON FdLy: “don” delay enabled also for the first call.

delayed for a “don” value, respect to the call. (no = “don” not enabled; enabled)

FdLF“doF” delay enabled also for the first switching off

between the request of a release and the act ual s witching off. (no = “doF” not enabled;

odo: Regulation delay on start-up:

after the time delay imposed in this parameter.

. (0÷255min).

Note: usually onon is greater than oFon.

yES

=”doF” enabled)

(0÷255s) on switching ON the instrument s tarts working

(0.10÷5.00bar/0.5÷30°C or 1÷80PSI/1÷50°F)

(-20÷20bar; -50÷50°C) this value is add to the

(0÷99.5min; res. 10s).

(0÷99.5 min; res.

(0÷99.5 min; res. 10s)

If enabled, the triggering of the step is

. It enables the “doF” delay

yES

=”don”

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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Operating instructions cod. 1592001300

LSE: Minimum set point

minimum value that can be used for the set point, to prevent the end user from setting incorrect values.

HSE: Maximum set point

maximum accept abl e val ue for set point.

: The measurement unit depends on dEU parameter. It sets the

12.6 Fans regulation

Pb Proportional band zone width

Set the dEU par. and the target set point for fans before setting this parameter.

band is symmetrical compared to the target set point, with extremes: set+Pb/2 ... setPb/2. The measurem ent unit depends on the dEU par.

ESF Energy saving value for fans:

point.

Fon: Time delay between the insertion of two different fans FoF: Time delay between switching off of two different compressors LSF: Minimum set point for fans

the minimum value that can be used for the set point, to prevent the end user from setting incorrect values.

HSF: Maximum set point for fans

the maximum acc eptable value for set point.

(00.10÷5.00bar/0.5÷30°C or 1÷80PSI/1÷50°F).

(-20÷20bar; -50÷50°C) this value is add to the fans set

(0÷255sec).

(0÷255 sec)

: The measurement unit depends on dEU param eter. It s ets

: The measurement unit depends on dEU param eter. I t sets

12.7 Alarms – compressor section

PAo: Alarm probe exclusion at power on.

before an alarm probe is signall ed. (0÷255 min). During this time if the pressure is out of range all the compressor are s witched on.

LAL: Low pressure (temperature) alarm – compressor section

depends on dEU parameter. It’ s al ways subtrac ted t o the s et point . When the value

LAL

is reached the A03C alarm is enabled, (possibly after the

HAL:High pressure (temperature) alarm– compressor section

depends on dEU parameter. It’s always added to the set point. When the value SET+HAL is reached the A04C al arm is enabled, (possibly after the

tAo:Low and High pressure (temperature) alarms delay– compressor section

min) time interval bet ween the detection of a pres sure (temperat ure) alarm condi tion and alarm signalling.

Ser: Service request:

maintenance call is generated.

SPr: number of steps engaged with faulty probe PoPr capacity engaged with faulty probe

(1÷9990 hours, res. 10h) number of running hours aft er that the “A14”

it is the period starti ng from ins trument s witch on,

: The measurement unit

tAo

delay time).

: The measurement unit

tAo

delay time).

. (0÷#compr).

(0÷100%) It’s used only if CtyP =dPo.

The

SET-

: (0÷255

12.8 Alarms – fans section

LAF: Low pressure alarm – fans section

parameter. It’s al ways referred to fan s et point When the value SETF-LAF is reached the LA2 alarm is enabled, (possibly after the

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

: The measurement unit depends on the dEU

AFd

delay time).

16 / 28



Operating instructions cod. 1592001300

HAF:High pressure alarm – fans section

parameter. It’s al ways referred to the set point. W hen the value SETF+HA F is reached the HA2 alarm is enabled, (possibly after the

AFd:Low and High pressure alarms delay – fans section

between the detection of a pressure alarm condition in the fans section and alarm signalling.

FPr: Number of fans engaged with faulty probe

: The measurement unit depends on the dEU

AFd

delay time).

: (0÷255 min) time interval

. (0÷#fans).

12.9 Other

tbA Alarm relay silencing:

yES=

oFF Switching ON/OFF enabling from keyboard: (no

Ad1: Compressors address Ad2: Fans address rEL Software release Ptb Parameter table code Pr2 Access to security code protected menu

alarm relay is switc hed off by pushing any keys.

the switching ON/OFF of the ins trument by pressing the SET key for more than 4s.

(1 –247) It is used in monitoring system.

by pushing one of the keypad buttons. no= alarm relay stays on;

= disabled;

(1 –247) It is used in monitoring system.

for internal use.

: readable only.

yES

= enabled) It permits

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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

Compressor inserction area

neutral zone

Compressor disconnection area

Operating instructions cod. 1592001300

13. Type of regulation

13.1 Dead band – Only for compressors

This kind of regulation is available onl y for c om press ors. The neut ral zone (Pbd) is s ym m etric al compared to the target set point, with extremes: set+Pbd/2 ... set-Pbd/2. If the pressure (temperature) is inside this zone the controller maintains the same number of l oads switched on and off, without changing anything. When the pressure (temperature) go out from the zone, regul ation starts. If the pres sure is greater than SET+Pbd/2, the l oads are switching on with tim ing given by param eters: don and doF. A load is turned on only if the his safety times Regulation stops when the pressure (temperature) come back int o the neutral zone.

In the following a simpli fy exemplum that explains the regulation i n neut ral zone f or c om pres sor homogeneous with 1 step for each c ompressors. The safety ti mes onon, oFon and donF are not considered. In the real regulation the a load is entered or turned off only if t hese times are over.

Ex. Dead band control, compressors with same capacities, 1 step for each com p ressor. In this example:

oA1 = cPr; oA2 = cPr; oA3 = cPr; oA4 =nu; CtyP = SPo rty = db Sty = yES FdLy = no dLF = no

Set + (Pbd/2)

Se t - (Pbd/2 )

Compressor

Dela

functionin

homogeneous compressors;

dead band regulation

rotation “don” delay not enabled at first calling after an equilibrium condition.

“doF” delay not enabled at first calling after an equilibrium condition.

Pressure

Set

Status

&

&

&

GRQ

GR)

don

onon, oFon, donF

don

are over.

number of compress ors

doF

7LPH

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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

ALL LOADS ON

ALL LOADS OFF

Operating instructions cod. 1592001300

13.2 Proportional Band – for compressors or fans

The regulation band (Pbd) is divided into as many parts as there are stages according to the following formula:

# step = oAi = CPr or StP (number of compressors or steps).

The numbers of stages s witched ON is proportional to the value of the input signal: when thi s distances itself from the target set point and enters the various bands, the com pressors are switched ON, to be then turned OFF when the signal bri ngs near the set point.

In this way if the pressure is greater than regulation band, all the compress ors are on, if the pressure (temperature) is l ower than t he regul ation band all the compressors are off. Naturally also for this regulat ions all the delays (don and doF) saf ety times (onon, oFon and donF) are valid.

Regulation according to the running hours

The algorithm switch on and off the loads according to the runni ng hours of each load. In this way the running hours are balanced.

Example

oA1 = cPr; oA2 = cPr; oA3 = cPr; oA4 = cPr: 4 CtyP = SPo rty = Pb Sty = yES FdLy = no dLF= no

homogeneous compressors.

proportional band regulation rotation “don” delay at first call not enabl ed. “doF” delay at first call not enabl ed.

compressors

Set+Pbd/2 Set+Pbd/4

Set-Pbd/4 Set-Pbd/2

This draw highlights the doF tim e: the loads are in fact turned off only when the doF time is over.

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

6(7

GRQ

GR)

=,&

&

&

&

&

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

Operating instructions cod. 1592001300

14. Mounting & installation

The instruments are suitabl e only for internal us e. Instrum ents shal l be mounted on panel, in a 29x71 mm hole, and fixed using the special brackets supplied. To obtain an IP65 protection grade use the front panel rubber gask et (mod. RG-C) as shown in figure. The ambient operating temperature range is between 0÷60°C. Avoid locations subject to heavy vibration, corrosive gas es or excessive dirt . The same appli es to the probes. Ensure ventil at i on around the instrument.

Figure 1

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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Operating instructions cod. 1592001300

15. Electrical connections

The controller is provided with screw term inal blocks for wires having section not bigger than

2.5 mm

Check power supply data before connection wires.

Keep the probe and the digital input wires separate from the power cable.

Do not exceed the maximum rating current for each relay, check technical data and if the load is bigger, use filtered c ontactors. Before connecting cables make sure the power supply complies with the instrument’s requirements. Separate the input connection c ables from the power supply cables, from the outputs and the power connect ions.

relay

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

Do not exceed the maximum current allowed on each

15.1 Probes connection

Pressure probe (4 - 20 mA)

bear parts which could cause short circuiting or introduce noise disturbance at high frequencies. To minimise the induced disturbances use shielded cables with the shield connected to earth.

Temperature probe:

streams to correc tly measure the temperature.

: respect the polarity. If using terminal ends be sure there are no

it is recomm ended to place the temperature probe away from direct air

16. RS485 serial link

All models can be int egrated into the m onitoring and al arm s ystem XJ500 using t he TTL seri al port. They use the standard ModBus RTU prot ocol, s o they c an be fitt ed in a sys tem integrat or using this protocol.

The controller has 2 serial addresses first one Ad1 for compressor section, second one Ad2 for fan section. To completely monitor both sections the values of the 2 addresses have to be different. If the Ad2 parameters have the same value the status of the fans is not monitored.

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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

Operating instructions cod. 1592001300

17. Technical features

Housing: Case: Mounting : Protection: Frontal protection: Connections: Power supply: Power absorption: Display: Inputs: Digital inputs Relay outputs: Serial output : Communication protocol: Data storing: Kind of action: Operating temperature: Relative humidity: Measuring range: NTC probe: Resolution:

Self extinguishing ABS.

Front panel 32x74 mm, depth 60m m (“C” format);

“C” format panel mounti ng i n a 29x71 m m panel cut-out

IP65.

IP65 with frontal gasket mod RG-C model.

screw terminal block,

12Vac/dc

3 digits red led and 4 digit orange led.

1 NTC probe, or 1 PTC probe or 1 4÷20mA transducer.

: 5 free voltage

5 relay SPST 8(3)A, 250Vac

TTL standard

on the non-volatile memory (EEPROM).

1B;

0,1 °C or 1°C;

10%, 24Vac/dc ± 10%, 50-60Hz.

5VA max.

ModBus – RTU

Pollution grade:

0÷60 °C.;

85% (no condensing)

Accuracy (ambient temp. 25°C)

normal;

Storage temperature:

-40÷110°C.

Software class:

18. Alarm list

Usually alarm conditions are signalled by means of:

1. Activation of alarm output relay

2. Buzzer activation

3. Message on proper display

4. Log of alarm: code and duration.

-25÷60 °C.

: ±0,7 °C ±1 digit

The table at paragraph 18.3

18.1 Types of alarms and signalling managed

18.1.1 A12: Configuration alarm

The following configuration paramet ers are checked after each modi fication.:

OA1 ÷ OA4

CtyP

When these param eters are set in wrong way an alarm message is generated: the label A12 is shown on the upper display, while the lower displ ay signal s what wrong sett ing has created the error: The following table contains the displayed messages:

Mess. Errata Corrige

nLod

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

Outputs 1- 4 configuration Compressor type

Number of loads higher than loads available in the

•

Check number of oAi set as load, this

number has to be lower of equal to the

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

cStP

FAP2

CSP2

controller number of relay of the control l er. Load (step) configuration error

P2 probe not available for fan regulation

P2 probe not available for screw compressor

Operating instructions cod. 1592001300

•

A relay oA(i) has been set as compressor

without a previous relay oA(i-1) has been set as compressor. E I oA1 = StP

•

Some relays have been set as compressors

(oAi = CPr) some others have been set as fans (oAi = FAn). Set all t he oA i as compressors or fans.

•

Check CtyP and set i t different from Scr.

18.1.2 EA1÷EA4: Compressors or fans safeties alarm.

Terminals WARNING: THESE TERMINALS REQUIRE A FREE OF VOLTAGE CONNECTION.

The terminals (6-11, 7-11, 8-11, 9-11) really used depends on the number of loads. The protections regarding the compressors and fans are connected to thes e inputs. If one of these protections is enabling (E.I. for lack of oil or overheating, etc,) the corresponding load is turn off.

Parameters ALIP:

It establishes if the input is activated by c losing (ALIP = cL) or by opening (ALI P = oP)

the terminals.

Actions

Every time one input is ac tivated the corresponding output is turned off.

Recovery

Recovery depends on

ALMr

With disabled. With key for 3s.

= no The instrument restart the standard operating mode when the input is

ALMr

yES

ALMr

parameter:

manual recover for the alarm s of compressors and fans. Push the

DOWN

18.1.3 P1: probe failure alarm

It is generated by failure in t he probe P 1.

Parameters

According to the confi gurat i on of the controller one of the following parameters is used:

SPr: number of steps engaged with faulty probe PoPr: capacity engaged with faulty probe FPr

Number of fans engaged with faulty probe

Recovery

Automatic as soon as probe restarts working.

. (0÷# oAi = cPr or StP).

(0÷255) It’s used only if CtyP=dPo .

. (0÷# oAi = FAn)

18.1.4 HA, LA, HA2, LA2High and low pressure (temperature) alarms

This alarm signals that the pressure (tem perature) is out of limits est ablished by parameters LAL and HAL for compress ors and LAF –HAF for fans.

tAo

The

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

and

AFd

parameters set the delay between alarm c ondition and alarm signalling.

23 / 28



Code

Automatically

Action

The alarm is signalled with s tandard action. The outputs are unchanged.

Operating instructions cod. 1592001300

18.2 Alarm muting

Press any buttons to si l ence the buzzer during an alarm condition. Hold pressed for more than 3 seconds switch off the alarm rel ay duri ng an al arm condition

18.3 Alarm conditions – summary table

P1 P1 probe failure

EA1 EA2 EA3 EA4

LA Minimum

LA2 Minimum

HA Maximum

HA2 Maximum

A5 Liquid level

A14 Load

Description Cause Action Reset

alarm

Load safeties alarm

pressure (temperature) alarm for compressors

pressure (temperature) alarm for fans

pressure (temperature) alarm for compressors

pressure (temperature) alarm for fans

alarm

maintenance alarm

Probe failure or out of range

Safeties compressor/f an input activation. NOTE: with step compressors 1 input for each compressor has to be used. Suction pressur e or temperature lower than SET_C-LAL value

Condensing pressure or temperature lower than SET_F-LAL value Suction pressur e or temperature higher than SET_C+HAL value

Condensing pressure or temperature higher than SET_F+HAL value Input enabled signalling only

A load has worked for the hour set in the SEr parameter

The compressors are activated according to the SPr or PoPr parameters. the corresponding load is turned off. (with step compressors all relays referred to the input are disabled). signalling only

signalling only

Automatically

working.

Recovery depends on With standard operating mode when the input is disabled. With alarms of compressors and fans. Push the

DOWN Automatically:

temperature reaches the (Set_C-LAL+ differential) value. (differential = 0.3bar or 1°C)

Automatically:

temperature reaches the (Set_F-LAL+ differential) value. (differential = 0.3bar or 1°C)

Automatically:

temperature reaches the (Set_C + HAL differential) value. (differential = 0.3bar or 1°C)

Automatically:

temperature reaches the (Set_F + HAL differential) value. (differential = 0.3bar or 1°C)

Manually:

compressor (see par. 8 Running hours of loads)

as soon as the probe restarts

= no The instrument restart the

ALMr

key for 3s.

reset the running hour of the

ALMr

manual recover for the

yES

as soon as the pressure or

as soon as the input i s disabled

parameter:

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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

LOAD4

LOAD3

LOAD2

LOAD1

ALARM

Input

4÷ 20 mA

Operating instructions cod. 1592001300

19. Wiring connections







Probe: PP11 / PP30: Brown (5), White (4) PTC/NTC: 3-4

















8(3)A250V8(3)A8(3)A8(3)A8(3)A





Hot Key



1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

25 / 28



Level

20. Default value

Operating instructions cod. 1592001300

Name

°C °F bar PSI

SEtC SEtF OA1

OA2

OA3

OA4

CtyP StP PC1 PC2 PC3 PC4 FtyP rty Sty rot PbC PA04

PA20

CAL

i1C i1F

did ALIP

ALMr

dEU

rES rELP Pdb

ESC

OnOn

OFOn

-18,0 35,0

CPr CPr CPr CPr Pr2 Outputs 1 configuration CPr(0) - FAn(1) - StP(2) - ALr(3) - LIn(4) CPr CPr CPr CPr Pr2 Outputs 2 configuration CPr(0) - FAn(1) - StP(2) - ALr(3) - LIn(4) CPr CPr CPr CPr Pr2 Outputs 3 configuration CPr(0) - FAn(1) - StP(2) - ALr(3) - LIn(4) CPr CPr CPr CPr Pr2 Outputs 4 configuration CPr(0) - FAn(1) - StP(2) - ALr(3) - LIn(4) -

SPo SPo SPo SPo Pr2 Compressor type SPo(0) - dPo(1) - Scr (2)

CL CL CL CL Pr2 Valve outputs polarity OP(0) - CL(1)

25 25 25 25 Pr2 Power of compressor 1 0 ÷ 255 25 25 25 25 Pr2 Power of compressor 2 0 ÷ 255 25 25 25 25 Pr2 Power of compressor 3 0 ÷ 255 25 25 25 25 Pr2 Power of compressor 4 0 ÷ 255

404 404 404 404 Pr2 Freon Type r22(0) - 404(1) - 507(2) - 134(3) - 717( 4)

db db db db Pr2 Type of regulation db(0) - Pb(1) yES yES yES yES Pr2 Compressor rotation no(0) - yES(1) yES yES yES yES Pr2 Fans rotation no(0) - yES(1)

Cur Cur Cur Cur Pr2 Probe 1 setting Cur(0) - Ptc(1) - nt c( 2)

0,5 7 0,5 7 Pr2 Adjustment of read out for the Probe

12,0 174 12,0 174 Pr2 Adjustment of read out for the Probe

0 0 0 0 Pr2 Probe calibration (dEU=bar o °C) -12.0 ÷ 12.0 (dEU=PSI

cL cL cL cL Pr2 Configurable digital input polarity OP(0) - CL(1)

ES ES ES ES Pr2 Configurable digital input polarity

0 0 0 0 Pr2 Configurable digital input del ay 0 ÷ 255 (min.)

CL CL CL CL Pr2 Alarm input for compressors and fans

no no no no Pr2 Manual reset of alarms for

°C °F bar PSI Pr2 Default measurement unit for dE in dE in Pr2 Resolution for °C and bar in(0) - dE(1)

rEL rEL rEL rEL Pr2 Pressure displaying rEL(0) - AbS(1)

4 8 0.5 7 Pr2 Proportional band or neutral zone 0 0 0 0 Pr2 Energy saving value for compressors (BAR) -20.0÷20.0 (°C) -50.0÷50.0 5 5 5 5 Pr2 Minimum time between 2 following 2 2 2 2 Pr2 Minimum time between the switching

2,3 33 -- Set point for compressors LSE÷HSE

15,1 220 -- Set point for fans LSF÷HSF

Description Range

nu(5) nu(5) nu(5) nu(5)

at 4mA at 20mA

functions

polarity compressors and fans displaying

width

switching ON of the same compressor off of a compressor and the following

switching on

(0.0 ÷ PA20)BAR (0 ÷ PA20)PSI

(PA04 ÷ 51.0)BAR (PA04 ÷ 750)PSI

o °F) -20 ÷ 20

ES(0) - OFF(1) - LL(2)

OP(0) - CL(1)

no(0) - yES(1)

Bar(0) - °C(1) - PSI(2) - °F(3)

(BAR) 0.1÷10.0 (°C) 0.1÷30.0

(PSI) 1÷80 (°F) 1÷50

(PSI) -300÷300 (°F) -90÷90

0 ÷ 255 (min.) 0 ÷ 255 (min.)

1592001300 XC440C gb r1.0 07.06.2004.doc rel. 1.0

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

Level

Operating instructions cod. 1592001300

Name

°C °F bar PSI

don

0,3 0,3 0,3 0,3 Pr2 Time delay between the insertion of

doF

0,1 0,1 0,1 0,1 Pr2 Time delay between switching off of

donF

0,3 0,3 0,3 0,3 Pr2 Minimum time a stage stays switched

FdLy

no no no no Pr2 “don” delay enabled also for the first

FdLF

no no no no Pr2 doF” delay enabled also for the first

odo

20 20 20 20 Pr2 Regulation delay on start-up 0 ÷ 255 (sec.)

LSE

-40 -40 0,3 5 Pr2 Minimum set point) BAR: (PA04÷HSE)abs; ((PA04-

HSE

10 50 7,2 100 Pr2 Maximum set point BAR :(LSE÷PA20)abs o (LSE÷(PA20-

ESF

Fon

FoF

LSF

HSF

PAO LAL

HAL

tAo

SEr SPr

PoPr LAF

HAF

AFd

4 8 2.0 24 Pr2 Proportional band zone width (BAR) 0.1÷10.0 (°C) 0.1÷30.0 0 0 0 0 Pr2 Energy saving value for fans (BAR) -20.0÷20.0 (°C) -50.0÷50.0

15 15 15 15 Pr2 Time delay between the insertion of

5 5 5 5 Pr2 Time delay between switching off of

10 50 7,2 100 Pr2 Lower set for fans BAR :(FA04 ÷ HSF)abs ((FA04 - 1.013) ÷

60 140 27,8 404 Pr2 Higher set for fans BAR : (LSF ÷ F20)abs (LSF ÷ (F20-

30 30 30 30 Pr2 Alarm probe exclusion at power on 0 ÷ 255 (min.) 15,0 30 1,5 21 Pr1 Low pressure (temperature) alarm –

20.0 40 2,5 46 Pr1 High pressure (temperature) alarm–

15 15 15 15 Pr1 Low and High pressure (temperature)

999 999 999 999 Pr2 Service request 1 ÷ 999 (0= ESCLUSO) (10 ore)

2 2 2 2 Pr2 number of steps engaged with faulty

50 50 50 50 Pr2 capacity engaged with faulty probe 0 ÷ 100 (%)

20 40 6,7 96 Pr1 Low pressure alarm – fans section (0.1 ÷ 30.0)BAR (0.1 ÷ 100.0)°C (1 ÷

20 40 9,8 141 Pr1 High pressure alarm – fans section (0.1 ÷ 30.0)BAR (0.1 ÷ 100.0)°C (1 ÷

15 15 15 15 Pr2 Low and High pressure alarms delay

Description Range

two different compressors two different compressors ON call switching off

(PA04÷HSE)abs o ((PA04-14)÷HSE)rel; °F:

two different fans two different fans

1.013))rel; °C:LSF ÷ 150.0; PSI: (LSF ÷ FA20)abs o (LSF÷ (FA20 - 14))rel; ° F: LSF ÷ 302

compressor section compressor section alarms delay– compressor section

probe

– fans section

0 ÷ 99.5 (min.10sec) 0 ÷ 99.5 (min.10sec) 0 ÷ 99.5 (min.10sec)

no(0) - yES(1) no(0) - yES(1)

1.013)÷HSE)rel; °C: -50.0÷HSE; PSI:

-58.0÷HSE

1.013))rel; °C:LSE ÷ 150.0; PSI:(LSE ÷

PA20)abs o (LSE÷(PA20-14))rel; °F: LSE

÷ 302

(PSI) 1÷80 (°F) 1÷50.0

(PSI) -300÷300 (°F) -90÷90

0 ÷ 255 (sec) 0 ÷ 255 (sec)

HSF)rel; °C:-50.0 ÷ HSF; PSI: (FA04 ÷

HSF)abs o ((FA04-14) ÷ HSF)rel; °F: -58.0

÷ HSF

(0.1 ÷ 30.0)BAR (0.1 ÷ 100.0)°C (1 ÷

430)PSI (1 ÷ 200.0)°F

(0.1 ÷ 30.0)BAR (0.1 ÷ 100.0)°C (1 ÷

430)PSI (1 ÷ 200.0)°F 0 ÷ 255 (min.)

0 ÷ (nCPR)

430)PSI (1 ÷ 200.0)°F

0 ÷ 255 (min)

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

Level

Operating instructions cod. 1592001300

Name

°C °F bar PSI

FPr

tbA oFF

Ad1 Ad2 rEL Ptb Pr2

2 2 2 2 Pr2 Number of fans engaged with faulty

yES yES yES yES Pr2 Alarm relay silencing no(0) - yES(1)

no no no no Pr2 Switching ON/OFF enabling from

1 1 1 1 Pr2 Compressors address 1 ÷ 247 1 1 1 1 Pr2 Fans address 1 ÷ 247

Description Range

probe

keyboard

Pr1 Software release read only Pr1 Parameter table code read only Pr1 Protected parameter menu read only

Fans parameters Compressor parameters Common parameters

0 ÷ (nFAN)

no(0) - yES(1)

Dixell s.r.l.

Z.I. Via dell’Industria, 27 - 32010 Pieve d’Alpago (BL) ITALY tel. +39 - 0437 - 98 33 - f ax +39 - 0437 - 98 93 13 http://www.dixell.com E-mail: dixell@dixell.com

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dixell xc440c Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

INDEX

1. General warning

2. General description

3. First installation

3.1 How t o set t he kind of gas

3.2 How t o set t he range of the pressure probes

3.3 How t o set t he kind of display: relative or absolute pressure

4. User interface

4.1 Displaying

4.2 Keyboard

4.3 THE ICONS

5. How to see and modify the set point

5.1 How t o see t he set point of compressors or fans

5.2 How t o modi f y the set point of compressors or fans

6. Parameters programming

6.1 How to ent er t he “Pr1” paramet er l i st

6.2 How to ent er i n paramet ers l i st “Pr2”

6.3 How t o change paramet er values

7. How to disabled an output

7.1 How t o di sabled an output during a maintenance session.

7.2 Output disabled signalling.

7.3 Regulation with some outputs disabled.

8. Running hours of loads

8.1 How t o di splay the running hours of a load.

8.2 How t o reset t he running hours of a load.

9. Alarm Menu

9.1 How t o see t he al arms

10. Use of the programming “HOT KEY “

10.1 How t o program a hot key from the instrument (UPLOAD)

11. Keyboard locking

11.1 How t o l ock t he keyboard

11.2 To unlock the keyboard

12. List of parameters

12.1 Plant dimensioni ng and t ype of regulati on.

12.2 Probes configuration

12.3 Others inputs configuration

12.4 Display and Measurement unit

12.5 Compressors regulation

12.6 Fans regulation

12.7 Alarms – compressor section

12.8 Alarms – fans section

12.9 Other

13. Type of regulation

13.1 Dead band – Only for compressors

13.2 Proportional Band – for compressors or fans

14. Mounting & installation

15. Electrical connections

15.1 Probes connection

16. RS485 serial link

17. Technical features

18. Alarm list

18.1 Types of alarms and signalling managed

18.2 Alarm muting

18.3 Alarm conditions – summary table

19. Wiring connections

20. Default value