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VDH MC3-SC Manual

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Description:
MC3-SC Stepped Controller
Type:
Manual
File:
Do140744 MC3-SC Step Control V13
EN.docx
VDH Products BV
MC3-SC Manual
Step controller
Pages:
By:
Initials:
45
Doc. no.
BVDB
Version:
Date:
140744
1.3
10-05-2016

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Summary of Contents for VDH MC3-SC

  • Page 1 MC3-SC Manual Step controller Description: MC3-SC Stepped Controller Pages: Doc. no. 140744 Type: Manual BVDB Version: File: Do140744 MC3-SC Step Control V13 Initials: Date: 10-05-2016 EN.docx VDH Products BV...

  • Page 2: Table Of Contents

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 Contents Functional specifications ..........................4 Operation ................................5 General ................................. 5 Standby mode ............................5 Switching the controller off........................7 Turning the controller on ........................7 Screen layout ............................. 9 2.5.1 Settings button ..........................9 2.5.2...
  • Page 3 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Thermostat ............................... 25 Production data ............................26 Hardware configuration ..........................27 Alerts ................................... 33 Functional flow ..............................34 How the P band works on the suction side (compressor side)........... 34 Overview of the functional flow for 4 compressors when stepping compressor levels up and down ..............................

  • Page 4: Functional Specifications

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 1 Functional specifications The MC 3-SC is an 8-level stepper controller than can regulate a maximum of 8 compressors and 8 condenser fans up and down, based on the measured suction and discharge pressures and the active setpoints.

  • Page 5: Operation

    1.3 2 Operation The operating panel of the MC3-SC is split into two parts, with the compressor part (SUCTION) on the left and the condenser part (DISCHARGE) on the right. These two parts are operated and read in virtually the same way. The current status and settings of the controller can be read off from the touch panel.
  • Page 6 192.168.100.1 for the controller and 192.168.100.101 for the touch panel. The touch panel has to be told where to find the controller. This can be done by touching the text “MC3-SC” (in the middle of the screen) and holding for 10 seconds. The following screen then appears.

  • Page 7: Switching The Controller Off

    (discharge) part on the right. This screen also contains two buttons located in the top corners. Settings button. This button is in the top left corner (VDH logo). This is where the controller settings can be adjusted.
  • Page 8 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Standby button. This button is in the top right corner. It can be used for putting the controller into standby mode. Confirmation will be required first, of course. The standby button is not visible if the controller is configured to use a password for any changes that are to be carried out and when the user is logged out (either manually or by a timeout).

  • Page 9: Screen Layout

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.5 Screen layout This symbol is used to show that the user is Settings button logged in Date and time Standby button Control data Control data for regulating regulating compressors condensers Active compressor...

  • Page 10: Login Symbol

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.5.2 Login symbol This lets you see whether the user is logged in and able to make changes, can switch the controller to standby or off, etc. 2.5.3 Standby button This button can be used for switching the controller to standby and then turning it off if desired.

  • Page 11: Active Compressor Steps

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.5.6 Active compressor steps At the bottom of the compressor display, the active levels for are shown for the compressors that are enabled. Compressors that are turned off or not configured will not have a value shown beneath the symbol.

  • Page 12: Compressor Service

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.6 Compressor service Pressing the compressor overview shows a dialogue that can be used for bringing the compressors into service or removing them from the ‘in service’ status. The service status of a compressor can be changed by pressing it. The compressor symbols at the bottom will then go yellow.

  • Page 13: Troubleshooting

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.7 Troubleshooting If a compressor is in an error status, this is shown on the main screen. The compressor overview shows you which compressor has the error, and the control data is shown on a red background.
  • Page 14 If there are active alerts, they are shown in the screen and can be acknowledged using the button at the bottom right. The button at the top left with the VDH logo can be used for going back to the overview screen. Page 14 of 45...

  • Page 15: Controller Settings

    The button with the clock lets you change the clock for the controller and the touchscreen. The time on the MC3-SC controller is shown on the left-hand side; this can be changed and the Apply button then saves it to the controller. On the right-hand side there are two buttons for setting the time in the controller to match the panel (after which you have to press Apply) or for using the time filled in for the controller as the panel time.
  • Page 16 MC3-SC Stepped Controller Document no.: 140744 version 1.3 The button with the book symbol is used for changing the controller’s parameters/ This screen lets you set the language to be used and various parameter settings can also be adjusted. The up and down buttons can be used for selecting the desired parameter. The desired parameter numbers can also be filled in directly by pressing the field with the number.

  • Page 17: Thermostat Function

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 2.9 Thermostat function When there is a triangle in the discharge part of the touchscreen, it means that the controller also has a thermostat function. Pressing this replaces the discharge part of the screen with a thermostat readout.

  • Page 18: Parameters

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 3 Parameters Number Description Range Unit Value Compressor settings P 10 Minimum adjustable compressor pressure -1.0 to 50.0 setpoint P 11 Maximum adjustable compressor pressure 0.0 to 50.0 50.0 setpoint P 12 P band for compressor level control 0.1 to 50.0...
  • Page 19 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Number Description Range Unit Value Condenser settings P 30 Minimum adjustable condenser pressure 0.0 to 50.0 setpoint P 31 Maximum adjustable condenser pressure 0.0 to 50.0 50.0 setpoint P 32 P band for condenser regulation 0.1 to 50.0...
  • Page 20 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Number Description Range Unit Value Condensor pressure at low temperatures P 60 Temperature under which condenser -40.0..50.0 °C -40.0 limitation becomes active P 61 Maximum allowable pressure increase 0.0..50.0 P 62 Minimum duration of maximum pressure 0..6000...
  • Page 21 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Number Description Range Unit Value P 106 Maximum pressure alert delay, discharge 0 to 999 side P 107 Maximum pressure fault, discharge side -1.0 to 50.0 20.0 (this is not delayed and the compressors are...

  • Page 22: Explanation Of The Parameters

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 4 Explanation of the parameters 4.1 Compressor section P 10 & P 11 The range that the suction pressure setpoint can be set between from the front P 12 The proportional band. This is symmetrical around the setpoint. As long as the pressure is within this bandwidth, no compressor levels will be enabled or disabled.

  • Page 23: Condenser Part

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 P 21 Valve lifting can allow compressors to run with no load. This parameter lets you adjust how long the valves may be lifted for. P 22 A time can be set here stating how long the compressor must keep running as a minimum before it can be switched off again.

  • Page 24: Additional Settings

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 P 42 Minimum alert temperature for the temperature sensor on the suction side. P 43 Minimum alert temperature for the temperature sensor on the suction side that will cause everything to be switched off.

  • Page 25: Pressure Alerts

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 P 95 It is possible to make the setpoint of the discharge pressure depend on the outside temperature. The advantage of doing this is that the condensing can then be done at the lowest possible temperature, taking due note of the limits, of course.

  • Page 26: Production Data

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 section 4.7). P 601 When an external release contact is defined, the system waits for this period of time after that contact has been made before opening the evaporator valve, e.g. when combined with a flow sensor.

  • Page 27: Hardware Configuration

    The hardware configuration is done using settings on a web page. To be able to view the page, an Ethernet cable must be used to connect up to the touchpanel or a network switch. Use a web browser to connect to the MC3-SC by entering http://<ip.adres>/config into the address field of the browser.
  • Page 28 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Page 28 of 45...
  • Page 29 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Page 29 of 45...
  • Page 30 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Page 30 of 45...
  • Page 31 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Page 31 of 45...
  • Page 32 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Page 32 of 45...

  • Page 33: Alerts

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 6 Alerts The following error messages can appear in the SUCTION display: Pressure sensors faulty Action: Everything off Suction-side temperature sensor faulty Action: None (no regulation function) Low pressure alert Action: None...

  • Page 34: Functional Flow

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 7 Functional flow How the P band works on the suction side (compressor side) Overview of the functional flow for 4 compressors when stepping compressor levels up and down Page 34 of 45...

  • Page 35: Overview Of The Functional Flow For A Compressor With 5 Cylinders

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 Overview of the functional flow for a compressor with 5 cylinders How regulation works for a compressor with unequal steps A maximum of 1000 regulating steps can be made. If the number of steps is exceeded, error message ‘E 80’...
  • Page 36 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Step Compressor 1, Compressor 2 Total 6-cylinder variant, 1kW 4-cylinder variant, 2kW 0 cyl. 2 cyl. 4 cyl. 6 cyl. 0 cyl. 2 cyl. 4 cyl. 100% 100% 0.33 0.33 0.66 0.66 0.33...
  • Page 37 MC3-SC Stepped Controller Document no.: 140744 version 1.3 unique step, then the first one in sequence will be switched off. If the minimum on and off times are longer than the step-up and step-down times, an unstable system may result. Once the switch-off time has expired, something will always be switched off (as long as the minimum on-time has elapsed).

  • Page 38: Summary Versions

    MC3-SC Step Control-2 2x Press. mA (3L+VA) 0: uP 805.000057 5x Pt1000 (2L) 1: Aio 805.140176 8x Analog out [U/I] 2: Do 805.000060 16x Digital.in 3: Di 805.000061 12x Relays 9 Views View of MC3-SC touchscreen Page 38 of 45...
  • Page 39 MC3-SC Stepped Controller Document no.: 140744 version 1.3 View of MC3-SC Step Control-3 (3V blue housing) View of MC3-SC2 Step Control-2 (2V blue housing) Page 39 of 45...

  • Page 40: Connection Diagrams

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 10 Connection diagrams Position 0: 805.000057 Processor PCB Page 40 of 45...
  • Page 41 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Position 1: 805.140176 Analogue in/out PCB (HW config. 140176) Page 41 of 45...
  • Page 42 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Position 2(+4): 805.000060 Relay out PCB Page 42 of 45...
  • Page 43 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Position 3(+5): 805.000061 Digital input PCB Page 43 of 45...
  • Page 44 MC3-SC Stepped Controller Document no.: 140744 version 1.3 Position 4: 805.000074 Digital input/Relay output PCB (if used) Page 44 of 45...

  • Page 45: Dimensions

    MC3-SC Stepped Controller Document no.: 140744 version 1.3 11 Dimensions MC3-SC controller dimensions MC3-SC2 controller dimensions Page 45 of 45...

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