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EN - 46 

 

2

1.5

1

0.5

0

-0.5

Stage 2 

intake 

Stage 3 

intake 

Stage 3 

deadband 

Stage 2 

on 

Stage 2 

off

 

Stage 3 

on 

Stage 3 

off

 

Stage 1

on 

Stage 1 

off

 

Calculated 

error - setpoint

Stage 1 

intake 

Stage 2 

deadband

Stage 1 

deadband

Stage 1 
exhaust 

Stage 3 
exhaust 

Stage 2 
exhaust 

Stage 2 

intake 

Stage 3 

intake 

Stage 3 

deadband

Stage 2

on 

Stage 2 

off

 

Stage 3

on 

Stage 3 

off

 

Stage 1

on 

Stage 1 

off

 

Calculated 

error - setpoint

Stage 1 

intake 

Stage 2 

deadband

Stage 1 

deadband 

Stage 1 
exhaust 

Stage 3 
exhaust 

Stage 2 
exhaust 

 Proportional control (P coefficient): X2 - Setpoint 

Proportional control is the difference, or error (e), between the measurement and the setpoint when the controller time delay equals 0. 
It is corrected (multiplied) by the 

P 

coefficient. 

Proportional control accelerates the response to the measurement depending on the difference between the measurement and the setpoint. 
On its own, it does not reduce the difference between the measurement and the setpoint when the load on the loop is stable. 

 Integral control (I coefficient): 

Σ

 (incremental areas) 

Integral control is the sum of the errors between the measurement and the setpoint between two consecutives actions of the controller. 
It is corrected (multiplied) by the 

I 

coefficient. 

Integral control cancels out the difference between the measurement and the setpoint. 

 Derivative control (D coefficient): X2 - X1 

Derivative control is the difference between two errors (measurement - setpoint) between two consecutive actions of the controller (slope). 
It is corrected (multiplied) by the 

D 

coefficient. 

Derivative control offsets the effects of the process' dead time. Although derivative control has a stabilising effect, instability can be caused by 
an overly-high value. 

18.4.1 Action of the controller in cooling mode 

Circuit control: 

- If e 

> 

1 

→

  Stage 1 turns on 

- If 1 

<

 e 

<

 1.5  

→

  Stage 1 intake pulse 

- If e 

> 

1.5  

→

  Stage 2 turns on and stage 1 

at full capacity 
- If 1.5 

<

 e 

<

 2  

→

  Stage 2 intake pulse 

- If e 

>

 2  

→

  Stage 3 turns on and stages 

1 and 2 at full capacity 
- If 1 

<

 e 

<

 2.5 

→

  Stage 3 intake pulse 

- If e 

>

 2.5  

→

 

Stage 3 intake valve 

continuously open 
- If 1.5 

<

 e 

<

 2  

→

  Stage 3 intake and stage 2 at 

full capacity 100% 
- If 1 

<

 e 

<

 1.5  

→

 

Stage 3 deadband and 

stages 1 and 2 at full capacity 
- If 1 

<

 e 

<

 1.5  

→

  Stage 2 intake and stage 1 at 

full capacity (stage 3 not turned on) 
- If 0.5 

<

 e 

<

 1  

→

  Stage 3 exhaust and stages 1 

and 2 at full capacity 
- If 0.5 

<

 e 

<

 1  

→

  Stage 2 deadband and stage 

1 at full capacity (stage 3 not turned on) 
- If 0.5 

<

 e 

<

 1  

→

  Stage 1 intake (stages 2 and 

3 not turned on) 
- If 0 

<

 e 

<

 0.5  

→

  Stage 2 exhaust and stage 1 at full capacity 

- If 0 

<

 e 

<

 0.5 

→

  Stage 1 deadband (stages 2 and 3 not turned on) 

- If 

–

0.5 

<

 e 

<

 0 

→

  Stage 1 exhaust 

In all cases: 

- If e 

<

 0.5  

→

  Stage 3 turns off 

- If e 

<

 0  

→

  Stage 2 turns off 

- If e 

<

 

–

0.5  

→

  Stage 1 turns off 

NOTE:

 The intake and exhaust valves are actuated on only one compressor at a time. 

18.4.2 Action of the controller in heating mode 

Circuit control: 

- If e 

<

 

–

1  

→

  Stage 1 turns on 

- If –1.5 

<

 e 

<

 

–

1 

→

  Stage 1 intake pulse 

- If e 

<

 

–

1.5  

→

  Stage 2 turns on and stage 1 

at full capacity 
- If -2 

<

 e 

<

 

–

1.5 

→

  Stage 2 intake pulse 

- If e 

<

 

–

2  

→

  Stage 3 turns on and stages 1 

and 2 at full capacity 
- If 

–

2.5 

<

 e 

<

 

–

2 

→

  Stage 3 intake pulse 

- If e 

<

 

–

2.5 

→

 

Stage 3 intake valve 

continuously open 
- If 

–

2 

<

 e 

<

 

–

1.5 

→

  Stage 3 intake and stages 1 

and 2 at full capacity 
- If 

–

1.5 

<

 e 

<

 

–

1 

→

  Stage 3 deadband and stages 

1 and 2 at full capacity 
- If 

–

1.5 

<

 e 

<

 

–

1 

→

  Stage 2 intake and stage 1 at 

full capacity (stage 3 not turned on) 
- If 

–

1 

<

 e 

<

 

–

0.5 

→

  Stage 3 exhaust and stages 1 

and 2 at full capacity 
- If 

–

1 

<

 e 

<

 

–

0.5 

→

  Stage 2 deadband and stage 

1 at full capacity (stage 3 not turned on) 
- If 

–

1 

<

 e 

<

 

–

0.5 

→

  Stage 1 intake (stages 2 and 3 

not turned on) 
- If 

–

0.5 

<

 e 

<

 0 

→

  Stage 2 exhaust and stage 1 at full capacity 

- If 

–

0.5 

<

 e 

<

 0 

→

  Stage 1 deadband (stages 2 and 3 not turned on) 

- If 0 

<

 e 

<

 

–

0.5 

→

  Stage 1 exhaust 

In all cases: 

- If e 

>

 

–

0.5 

→

  Stage 3 turns off 

- If e 

>

 0 

→

  Stage 2 turns off 

- If e 

>

 0.5 

→

  Stage 1 turns off 

NOTE: The intake and exhaust valves are actuated on only one compressor at a time. 

Содержание XtraConnect 2

Страница 1: ...de signalisation microprocesseurs pour refroidisseurs de liquide et pompe chaleur Microchip and LCD display electronic regulation and signaling electronic module for liquid coolers and heat pumps Ele...

Страница 2: ...enu 20 5 5 Unit parameters menu 21 5 6 Adjustment parameters menu 21 5 7 Reading parameters menu 22 5 8 Fault memory menu 23 5 9 Test mode menu 24 5 10 TIME SCHEDULES menu 25 5 11 COMMUNICATION Menu 2...

Страница 3: ...water supply only 45 18 5 Water return control for storage CRISTOPIA 47 18 6 Modulating control water return only 47 18 7 Automated self regulating control 48 18 8 Compensation 48 19 CONDENSING PRESSU...

Страница 4: ...om power lines 400 V or a remote control line 230 V In the case of distances of over 6 m use a shielded cable connected to the earth on the unit Maximum distance 25 m 1 6 Connection of the communicati...

Страница 5: ...Outputs Control stage control Pump control General fault Consoles Local console The controls on the local console are enabled regardless of the value of P103 All faults can be reset from the FAULT ME...

Страница 6: ...following message to appear for 3 seconds 2 2 Description of the motherboard SWITCH W3 End of line resistance for two wire RS485 link The switch must be set to the left for the last unit on the loop...

Страница 7: ...CK J9 Link for chiller or MULTICONNECT TERMINAL BLOCK J10 Remote control console relay board link AEROCONNECT TERMINAL BLOCK J11 BMS link TERMINAL BLOCK J12 Local console link TERMINAL BLOCK J13 Link...

Страница 8: ...l outputs 3 25 valve output compressor 1 4 25 valve and intake valve neutral 5 Compressor 1 intake valve output 6 Compressor 1 exhaust valve output 7 Compressor 1 liquid valve and exhaust valve neutra...

Страница 9: ...nd 4 2 Circuit 3 fault output 3 Available 4 Available 5 Phase input common to terminals 6 7 and 8 6 Evaporator defrost heater output 7 Desuperheater heater output 8 Available TERMINAL BLOCK J11 on off...

Страница 10: ...d on unit Shield To expansion board XTRACONNECT 2 motherboard Unit 2 Local console See detail B MULTICONNECT motherboard Shield RS485 link to BMS Modbus protocol XTRACONNECT 2 ADD3 board Unit 1 module...

Страница 11: ...r 3 protection fault 47 48 Compressor 3 operation 49 50 Circuit 3 discharge temperature fault 51 52 Compressor 3 minimum superheat fault 53 54 Compressor 3 lubrication fault 3 ACCESS LEVELS Xtraconnec...

Страница 12: ...entering the access codes The digits in the access codes are replaced by the symbol When the or button is pressed this symbol is replaced by the digit 0 The digits in the code can then be selected us...

Страница 13: ...able Access level No Description Setting Default Display conditions MACHINE CONFIGURATION 3 1 Refrigerant type R134a R134a 3 2 Unit type 1 Water to water 2 Air to water 2 3 3 Number of circuits 2 3 2...

Страница 14: ...ntial 5 to 6 C resolution 0 5 10 C 3 51 Discharge temperature limit 60 to 6 C resolution 1 115 3 52 Water line frost protection limit 25 to 6 C resolution 0 1 2 3 54 HP fault threshold 15 to 45 bar re...

Страница 15: ...tion 1 5 If P131 Yes 1 134 Maximum setpoint at end of drift The highest setpoint if P120 1 or Setpoint if P120 1 to 60 C resolution 0 1 P123 If P131 Yes Control 2 141 Control mode 1 Return 2 Water sup...

Страница 16: ...esolution 1 DISABLED If P2 Water to water and Air to water and P119 Heating only 3 225 2 Max outdoor air temp in HEATING mode 5 to 25 C resolution 1 DISABLED If P2 Water to water and P119 Cooling only...

Страница 17: ...If P2 1 or 2 or 3 cooling mode 1 327 Circuit 1 subcooling C If P2 1 or 2 or 3 cooling mode Circuit 2 1 330 Circuit 2 HP If P2 Air to water and P3 2 1 330 1 Circuit 2 HP control setpoint If P3 2 and In...

Страница 18: ...put check Open Closed 1 418 Manual HP1 pressure switch input check Open Closed 1 421 Compressor 2 fault check Open Closed 1 422 Manual HP2 pressure switch input check Open Closed If P3 2 1 425 Compres...

Страница 19: ...n number 1 556 Console version number 1 557 2 ADD3 board version number If P3 3 1 557 3 ADD3 board version number circuit 3 If P3 3 1 557 4 ADD1 board version number circuit 3 P3 3 1 570 SO order numb...

Страница 20: ...K lower than that set in a higher access level 5 3 Unit status menu The unit status is displayed at power up and automatically reappears if the console is not used after a period of one hour To enter...

Страница 21: ...C U I T X S T O P L P x F A U L T C I R C U I T X S T A T E A N T I S H O R T C Y C L E X x m n x x s C O M P X U N A V A I L A B L E M I N S T O P x m n x x s C I R C U I T 2 C I R C U I T 3 C O O L...

Страница 22: ...draulic mode is installed P25 Number of pumps 1 or 2 P26 0 10 V programmable output used to control a three way valve on the hot water circuit P28 Master slave control of two parallel connected units...

Страница 23: ...P187 Circuit 2 fan stage differential see section 18 P188 Circuit 2 fan interstage differential see section 18 P189 Circuit 3 fan stage differential see section 18 P190 Circuit 3 fan interstage diffe...

Страница 24: ...pressure switch 1 input state P421 Stage 2 fault input state P422 High pressure switch 2 input state P425 Stage fault input state P426 Stage load shedding input state P427 High pressure switch 3 inpu...

Страница 25: ...E R G E N C Y S T O P x C U S T O M E R F A U L T x C I R C U I T H P x x C I R C U I T L P x x C O M P R E S S O R M O T O R X x L U B R I C A T I O N X x D I S C H A R G E T C I R C X x D E S U P E...

Страница 26: ...of rotation is correct If not check the power supply wiring This function is available in all operating states even if faults occur 5 10 TIME SCHEDULES menu To enter the TIME SCHEDULES menu use the or...

Страница 27: ...2 console Parameter A116 CIAT water chiller link is not accessible via the Xtraconnect 2 console because setting A116 to No will cut the link with the console Parameter A250 is not accessible because...

Страница 28: ...mps If the contact is open for more than 3 seconds If 3 shutdowns occur in 1 hour If a fault occurs Pumps turned off Compressors turned off 3 minute time delay Fault stored in fault memory Machine and...

Страница 29: ...Display Resetting Once the input closes acknowledge the fault by pressing RESET on the console If P24 Yes and P25 2 unit with hydraulic module and two pumps Operation Detected by opening of contact on...

Страница 30: ...ox Operation The reset outputs on the SE protection box are enabled when power is applied to the board These three inputs monitor the operation of each compressor They are associated with the operatio...

Страница 31: ...lly then acknowledge the fault by pressing RESET 6 13 LP fault on circuit 1 2 or 3 Operation If the pressure measured by the LP pressure transmitter is P55 the Xtraconnect 2 controller records an LP f...

Страница 32: ...ly The number of faults over a 24 hour period is managed Display Resetting If the number of faults in 24 hours 3 the fault is automatically acknowledged after 120 seconds and the fault input opens If...

Страница 33: ...arts up Minimum superheat fault If the superheat value P307 P337 or P367 drops below the minimum superheat limit value P44 for 1 minute the compressor is shut off and the minimum superheat error messa...

Страница 34: ...o the setpoint value heating and cooling and a fault is displayed Display the outdoor air temperature display range 40 to 99 9 C resolution 0 1 K If the sensor wire is cut and a short circuit occurs a...

Страница 35: ...nt leaks before turning on stages The slopes of the sensors are adjusted using parameters P30 to P41 Important The pressure values given are for relative pressure Short circuit faults will be detected...

Страница 36: ...in on off operation if neither has a fault The second available pump is turned on if a fault occurs on either pump The machine is turned off if a fault occurs on both pumps Unless a pump fault occurs...

Страница 37: ...er an electric liquid valve or to interlock the electronic expansion valve with the compressor If the outputs are used for either purpose they must be controlled by a relay The liquid valve outputs ar...

Страница 38: ...nimum off time This function limits the number of compressor starts to 4 per hour It is disabled in testing mode Important the compressors must be stopped for at least 5 minutes even during testing mo...

Страница 39: ...enable this function simply enter a value between 5 C and 25 C and press OK 15 7 3 Maximum air temperature limit in cooling mode This parameter can be set to between 35 C and 50 C in 1 increments Def...

Страница 40: ...llustrated below 2 circuits on 1 circuit on A limitation logic is used in cooling mode to start up the machine and if the valve opening time is too long to reduce the compressor capacity for 2 minutes...

Страница 41: ...aults and is authorised to operated The first machine to start is one that is available and has run for the shortest time Runtime balancing After every 50 hours of machine operation the system switche...

Страница 42: ...achine If it is shut off On Off by automatic operation control or a fault has occurred on it the slave machine will operate using its own setpoint and its own sensors Supply control A sensor must be a...

Страница 43: ...time schedule on the slave machine will become inaccessible 17 5 Unit status menu If there are no general faults and the automatic operation inputs are closed a submenu overrides the fault message is...

Страница 44: ...erating mode if the change is confirmed by pressing On Off or if the automatic control input is open Or the mode change is not confirmed contact returns to initial state and the unit resumes its initi...

Страница 45: ...o or outdoor sensor fault Control setpoint P121 if on off input open Control setpoint P122 if on off input closed If P127 Yes law based on outdoor temperature and there are no outdoor sensor faults Fi...

Страница 46: ...ue of the signal becomes less than 4 mA the value of the setpoint will not drop below the minimum setpoint 18 3 2 Setpoint based on outdoor temperature water law In cooling mode P127 Yes Slope adjustm...

Страница 47: ...ulse If e 1 5 Stage 2 turns on and stage 1 at full capacity If 1 5 e 2 Stage 2 intake pulse If e 2 Stage 3 turns on and stages 1 and 2 at full capacity If 1 e 2 5 Stage 3 intake pulse If e 2 5 Stage 3...

Страница 48: ...141 If P154 Yes Storage control is enabled The control mode is managed based on the setpoint selected If setpoint 1 is selected the control remains standard and the mode supply return is selected via...

Страница 49: ...nfiguring the compensator coefficient The compensator coefficient can be set to between 0 1 and 1 parameter P150 If the compensator coefficient 1 the function is disabled If the water return temperatu...

Страница 50: ...tages Common fans 3 and 4 will be controlled respectively by standard stages 3 and 4 on circuit 1 LX 3600 3900 with three and a half V frame condenser fan modules on both circuits 6 single speed stage...

Страница 51: ...2 3 Circuit 2 2 3 stages MC05 MC07 MC06 MC08 1 2 3 2150 Circuit 1 2 V 3 stages MC01 MC03 MC02 MC04 1 2 3 Circuit 2 2 V 3 stages MC05 MC07 MC06 MC08 1 2 3 2500 Circuit 1 2 V 3 stages MC01 MC03 MC02 MC...

Страница 52: ...odules per circuit 1 stage 3 fans with speed control 3 single speed stages same as standard 4 V frame condenser fan modules per circuit 1 stage 4 fans with speed control 3 single speed stages same as...

Страница 53: ...speed controlled fans and three stages of four on off fans per circuit 19 3 Condensing pressure control on 3 circuit machines Three circuit machines are always made up of two separate modules machines...

Страница 54: ...and terminals 2 3 on J3 closed On The HP control setpoint then becomes equal to P181 P193 The stage differentials P185 P187 and P189 remain at 3 5 bar The function that forces on all the fans is disa...

Страница 55: ...he antifreeze water temperature and the evaporating temperature compressor suction saturation P70 6 C by default if P52 2 or P70 8 if P52 2 and adjustable between 0 to 10 resolution 0 5 This control i...

Страница 56: ...he module on which they occur not the entire machine Water outlet sensor faults are also managed independently on the two modules Also if the manifold water outlet sensor is controlled and a fault occ...

Страница 57: ...g the control mode the Selected Days submenu appears Press OK then select the days Press to enable a day and to disable it The schedules are set in the following order start hour start minute end hour...

Страница 58: ...August off Schedule 1 MTWTF Schedule 2 MTWTF Setpoint 1 Setpoint 1 Setpoint 2 Setpoint 2 Result State MTWTF State MTWTF Setpoint 1 Setpoint 1 Setpoint 2 Setpoint 2 As Saturday and Sunday are not selec...

Страница 59: ...0x27 38 and 39 P288 Pump 2 runtime in hours Float Read only 0x28 and 0x29 40 and 41 P310 Number of compressor 1 starts Float Read only 0x2a and 0x2b 42 and 43 P311 Compressor 1 runtime Float Read only...

Страница 60: ...te Read only 1 on 0x08 8 Not used 0x09 9 Not used 0x0a 10 Not used 0x0b 11 Not used 0x0c 12 Not used 0x0d 13 Energy limiter on Read only 1 on 0x0e to 0x0f reserved 0x10 16 General fault summary 1 faul...

Страница 61: ...ult Read only 1 Fault 0x5a 90 Circuit 1 LP sensor fault Read only 1 Fault 0x5b 91 Circuit 1 suction sensor fault Read only 1 Fault 0x5c 92 Circuit 1 liquid sensor fault Read only 1 Fault 0x5d 93 ADD3...

Страница 62: ...ult 0x159 345 Compressor 3 discharge fault Read only 1 Fault 0x15a 346 Not used Read only 1 Fault 0x15b 347 Not used Read only 1 Fault 0x15c 348 Expansion valve fault circuit 3 Read only 1 Fault 0c15d...

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