Carel MRK0000000 User Manual
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Carel MRK0000000 User Manual

Mrack series. standard compressor rack single/two circuit
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µRack
Standard compressor racks single/two circuit
User manual
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!

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Summary of Contents for Carel MRK0000000

  • Page 1 µRack Standard compressor racks single/two circuit User manual NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT!
  • Page 3 Each CAREL product, in relation to its advanced level of technology, requires setup / configuration / programming / commissioning to be able to operate in the best possible way for the specific application. The failure to complete such operations, which are required/indicated in the user manual, may cause the final product to malfunction; CAREL accepts no liability in such cases.

  • Page 5: Table Of Contents

    CONTENTS PRODUCT ........................................7 General functions ......................................7 Main characteristics ......................................7 USER INTERFACE ......................................8 Buttons - LEDs - Icons ......................................8 LED display and Icons ......................................9 STARTING THE UNIT ....................................10 Starting for the first time ....................................10 Unit configuration ......................................10 Meaning of the inputs / outputs ..................................10 COMPRESSOR MANAGEMENT ..................................
  • Page 6 APPENDIX: CHANGES INTRODUCED IN FW RELEASE 2.0 FOR MRK0000XX0 ................41 APPENDIX: CHANGES INTRODUCED IN FW RELEASE 2.1 ......................42 APPENDICE: MODIFICHE INTRODOTTE NELLA RELEASE FW 2.2 ....................42...

  • Page 7: Product

    (only from MANUFACTURER R level). Hardw ware • The product co omes ready for pa anel installation, 3 2x74, and DIN rai il mounting. Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 8: User Interface

    /fan set point high/lo ow threshold to switch the displ lay of the same pa arameter from BA AR to °C. Tab. 2.a Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 9: Led Display And Icons

    2) If flashing indicates the ON/OFF call for a new compressor step, while the device is awaiting the expiry of the delay times. 3) If the controller is used for fan control only (“/01”=0) then the icon shows the status of the fans. Tab. 2.b Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 10: Starting The Unit

    RIC pressure probe e (0 to 5 Volt) or NTC if /16 Room tem perature probe (d display) / auxiliary y probe CAREL NTC temperature prob be (-50T100°C; R/ /T 10 k at 25°C) Outside air r temperature pro obe (floating cond...
  • Page 11 Power contactor for starting the fan / voltage-free contact for signalling unit alarm Tab. 3.c Analogue outputs Outputs Description Fans speed controller (PWM) Tab. 3.d 3.3.2 Wiring diagrams: Panel installation: Line PSOPZKEY* 24 V MCH2004850 Line TRADR1W04 Fig. 3.a Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 12 µRack DIN rail installation: Rack FCSER00000 Line Rack FCSER00000 24 V Line TRADR1W04 Fig. 3.b Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 13: Compressor Management

    In this cas se too, the first de evice stops immed diately, while the o others wait the de elay time between n stops (r09). Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 14: Number Of Compressors Started With Probe 1 Fault

    For two circuits, the parameter relating to the second circuit /08 must also be set. This will be related to the probe in the 2nd circuit. Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 15: Compressors With Different Capacities

    On unit models with capacity control (/01=9,10,...14) the compressors cannot be manually enabled/disabled directly. To exploit parameters M01,..,M08, the unit model needs to be changed (/01=1 for configurations 9, 10 and 11; /01=3 for configurations 12 and 13; /01=4 for configuration 14). Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 16: Special Mt-Lt Units

    (par rameter C01). Comp ressor call T[s] Comp ressor MinOn Minim mum ON time Time T[s] TMinOn Fig 4.f Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...
  • Page 17 This parameter limits the number of starts per hour. If, for example, the maximum allowable number of starts per hour is 10, to guarantee this limit simply set a value of 360 (parameter C05). Key: Compressor call T[s] Compressor TSameSw Minimum time between starts of the same compressor Time T[s] TSameSw Fig 4.i Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 18: Fan And Inverter Management

    -calculated base d from actual num mber of fans a vailable. Two d ifferent types of r rotation can be s Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 19: Inverter Management

    Discharge set point + Fan differential Min In Minimum value of the inverter control output Fig.5.d Proportional control, set by parameter r21, may be proportional only (parameter r21=0) or proportional + integral (parameter r21=1). Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 20 Key: InPress Discharge pressure Set point + differential StpM HP set point DOnZ Activation zone DOffZ Deactivation zone Dead band T [s] Time Inverter Inverter status NFan Number of fans on Fig. 5.f Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 21: Pwm-Ppm Management

    T[s] Fig. 5.g The PWM signal controls, for example, the CAREL FCS* series, CONVONOFF, CON0/10A0 modules. ON/OFF fan control board (code CONVONOFF0) The CONVONOFF0 modules convert the PWM signal sent from terminal Y to an ON/OFF signal. In practical terms, Y can be used to control a relay. Switching power 10A at 250 Vac in AC1 (1/3 HP inductive).

  • Page 22: Various Settings

    ). This alarm has a automatic reset, w with a fixed differe ential of 2°C. Examp ple of HT alarm m management Diff. 2°C Alarm ON temperature Set Poi Alarm OF Fig. 6.a Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 23: Prevent High Discharge Pressure

    Prevent HP activation threshold Time between compressor stops with prevent HP active Dprev1 Step activation delay after end prevent HP (prevent time 1) Dprev2 Minimum time for activation of high prevent frequency alarm (prevent time 2) Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 24: Alarm Management

    OFF CIRC 2 automatic (from multifunctio on input) General discharge e pressure switch All com mps. OFF Settable (from multifunctio on input) Low discharge pre essure All fa ans OFF automatic settable Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 25: Alarms From Analogue Inputs: Temperature Probe And Pressure Transducer

    1.0 bar discharge Example of LP alarm management Diff. Alarm on Alarm off Low press. Set Point Fig. 7.a Diff. Example of HP alarm management Alarm on High press. Set Point Alarm off Fig. 7.b Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 26: The Supervisor Network

    1. For fur rther information, refer to the corre esponding manua l or contact CAREL User interf face The pa arameters are divi ded into 2 catego ories. Display...

  • Page 27: List Of Parameters

    Config uration menu Set the typ e of unit, LT, MT or two circuit 0) LT Type o f unit 0 to 2 1) MT 2) TWO CI RCUIT Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...
  • Page 28 0) probe not connected B1 probe type 0 to 2 1) NTC probe 2) 0 to 5 V probe MIN suction pressure Set the minimum value of suction probe -1.0 to /19 -1.0 Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 29 Used to change the password to access the Manufacturer branch 0 to 999 B4 probe set: 0) probe not connected B4 probe type 0 to 2 1)0 to 5 V probe 2) 0 to 5 V probe Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 30 0 to 20.0 Fan differential Fan differential For single circuit only °C 0 to 20.0 15.5 Only if the inverter is Inverter set point Fan inverter set point r25 to r26 °C 35.7 enabled Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 31 On the 3rd activation, within the set time, the low pressure alarm from 0 to 999 alarms pressure switch changes from automatic to manual reset. Enable unit OFF due to probe disconnected/alarm OFF due to probe 0) NO disconnected 1) YES Maintenance menu Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 32: On/Off Fan Control Board (Code Convonoff0)

    O ON/OFF control of the condenser fa ans. The co ontrol relay has a s switching power 1 10A at 250 Vac in AC1 (1/3 HP indu uctive). Fig. 11.a Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 33: Pwm To 0 To 10 Vdc (Or 4 To 20 Ma) Conversion Board For Fans (Code Conv0/10A0)

    To assist t the identification o of the key to be u sed, CAREL has a pplied a label that t can used to desc cribe the program mming made or th he unit that the da ta refers to.
  • Page 34 Reset compressor 1 hours Reset compressor 2 hours Reset compressor 3 hours Reset compressor 4 hours Enable floating condenser control Enable unit Off due to probe fault Enable fans with compressor ON Tab. 14.b Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 35 Version of the application Type of refrigerant Capacity of compressor 1 Capacity of compressor 2 Capacity of compressor 3 Capacity of compressor 4 Inverter readout % “ Multifunction DI configuration B1 type probe Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...

  • Page 36: Default Configurations

    3 Fan 1 Normally y open contact, re elay no. 4 Fan 2 Normally y open contact, re elay no. 5 Generic a alarm b. 15.d Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 37: Glossary

    Buffer (memory): memory y on the board used d to save the default t values selected by CAREL for all the pa arameters. Permane nt memory, saves th he values even whe n power is disconne ected.

  • Page 38: Product Codes List

    -1...9,3 bar -1...12,8 bar 0...34,5 bar probe MRK0 00010DK MRK0 000200K panel panel MRK0 00030DK MRK0 000400K panel panel MRK0 00050DK MRK0 000600K panel panel MRK0 00090DK MRK0 000800K panel panel Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...

  • Page 39: Appendix: Compressor Rack Controller, Examples Of Application Diagrams

    C4 C3 C2 2 C1 Fig. 17.a 2 com mpressors un it + 2 conden ser fans F2 F1 C2 2 C1 Fig. 17.b Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...
  • Page 40 3 compressors unit with 2 fan steps and speed regulator (no alarm relay output) F1 C3 C2 C1 Fig. 17.c 2 compressors unit + 3 condenser fans F2 F1 C2 C1 Fig. 17.d Cod. CAREL +03P220431 rel. 2.2 dated 10/02/12...
  • Page 41 The default val lue has been chan nged from 90 sec to 60 min The max. value e has been change ed from 999 sec t to 500 min Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...
  • Page 42 /01= 9,10,11,12,13 an d 14” CARE EL reserves the ri ght to make mod difications or chan nges to its produc cts without prior notice. Cod. C CAREL +03P220 0431 rel. 2.2 date d 10/02/12...
  • Page 44 CAREL INDUSTRIES HQs Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 Fax (+39) 049.9716600 http: //www.carel.com e-mail: carel@carel.com...

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