Summary of Contents for Metacentre DCO
- Page 1 MANY0913B.GB – Metacentre DCO Technical Manual 28-02-2016 Duty Change Over...
- Page 2 Metacentre DCO Index Symbols 1.0 Safety Precautions Installation Refere to Section Indicated Operational Maintenance and Repair Note 2.0 Introduction Compressor Connections and Control Important or Caution, Safety 3.0 Features and Functions Pressure Control Tolerance Damping System Volume Duty Rotation Strategy GND;...
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Page 3: Safety Precautions
Technical Manual The product must only be operated at the supply 1. Safety Precautions voltage and frequency for which it is designed. When mains power is switched on, lethal voltages ALWAYS EMPLOY SAFE WORKING are present in the electrical circuits and extreme PRACTISE AND PROCEDURES caution must be exercised whenever it is necessary to carry out any work on the unit. - Page 4 Metacentre DCO 2.1 Compressor Connections and Control 2. INTRODUCTION The Metacentre DCO (Duty Change Over) is a specialised air compressor system management product designed to provide automated duty sequence rotation, and optimised single pressure band control, of multiple air compressors operating on a common air system.
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Page 5: Features And Functions
Low Pressure set point (b) is insufficient, the pressure will PH + TO continue to decrease at a reduced rate. The DCO will accommodate for this event by loading an additional compressor. The instance at which the additional PL - TO... - Page 6 If increase in air demand the additional reaction output capacity is greater than demand for air of the DCO, while pressure deviates into the the pressure in a system will increase, if ‘tolerance’ limit, is dynamically calculated. The...
- Page 7 3.5 Duty Rotation Strategy: The compressor that was assigned for duty (A) is re-assigned as last standby (D) and all other compressor assignments are incremented by The DCO’s control strategy consists of two sub one. strategies: 1) The compressor ‘Rotation’ strategy 2) The compressor load ‘Control’...
- Page 8 Metacentre DCO Compressor 1 (preferred) = priority 1 Compressors 2 to 4 = priority 2 Example 4: Compressors can be separated in to rotation groups. In this example compressors 1 and 2, Example 2: of a four-compressor system, have been set...
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Page 9: Installation
4.1 Unit Location and Mounting The DCO is wall mounting using two conventional screw fixings. The DCO can be located remote from the compressors but within 30m (100ft) cable length from each compressor and within 100m (330ft) cable length from the system pressure sensor. - Page 10 The nominal system pressure will 1.2 Nm reduce as the air treatment differential pressure increases. The Metacentre DCO will accept any power supply voltage between 115Vac to 230Vac +- 10%, 50/60Hz, 60VA; no internal adjustment or Ensure each compressor is equipped with setting change is necessary.
- Page 11 Technical Manual 4.4 Pressure Sensor Connection 3 2 1 The pressure sensor must be connected to terminal X01 of the DCO using an earth screened, twisted pair (0.25mm minimum), cable no greater than 100m (330ft) in length. 35mm 100m (330ft) max...
- Page 12 7 and 8 to Alarm contacts that are ‘closed When pins 7 and 8 are connected (closed circuit’ when the compressor is ready and circuit) the Metacentre DCO will indicate the available to automatically respond to a load associating compressor as OK. If the command.
- Page 13 ‘Load’ the Alarm input is ignored. A compressor Alarm condition will not be detected and indicated when the Metacentre DCO is not providing a ‘Load’ signal to the compressor. Main motor Line (or Delta) contactor (M) is equipped with a spare ‘volt-free’ normally open When the Metacentre DCO activates the ‘mi-...
- Page 14 Emergency Stop is activated (1). regulate the compressor in accordance with Metacentre DCO pressure control. mi-PCB 240V ' CE' 115V ' UL' For a compressor equipped with a ‘volt-free’...
- Page 15 For an air compressor fitted with a 2-wire (7psi) higher than the operating pressure electro-mechanical pressure switch, connect settings of the Metacentre DCO. Pressure the ‘mi-PCB’ output contacts in series with the switch settings near, or below, the Metacentre pressure switch. This will leave the pressure DCO pressure settings will disrupt successful switch ‘in-circuit’...
- Page 16 Metacentre DCO Auxiliary Inputs (Option) The DCO is equipped with two auxiliary inputs. The function of the input is menu selectable and can be adapted for different application requirements. 240V 'CE' 115V 'UL' Menu Map; Menu Items 4A max 0.5 - 1.5mm Auxiliary output relay contacts are rated for 240V ‘CE’...
- Page 17 Number of Compressors 4.PU Display Pressure Unit 5.1 Physical Checks 3.C1/4 Compressor #1-4 Before applying power to the DCO ensure that Alarm Input Type the power supply connections are correct and secure and within the range 115Vac to 230Vac 2.C1/4 Compressor #1-4 (+-10%), 50/60Hz, 60VA.
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Page 18: Menus And Navigation
6.2 Menu Item Adjustment 6. Menus and Navigation When in menu mode the upper display will The Metacentre DCO has a number of menus. show the menu number followed by the menu Each menu contains a group of adjustable item code, separated by a full stop (period): settings. - Page 19 Compressor #1 Alarm Type The DCO will only automatically restart when Compressor #2 Alarm Type power is restored if the DCO was in an Compressor #3 Alarm Type * operational ‘Started’ state when the power loss Compressor #4 Alarm Type * or disruption occurred.
- Page 20 DCO will stop when input is ‘off’ (open circuit). The keypad ‘start’ and ‘stop’ The maximum number of compressors is buttons remain active. determined by the DCO model; 2, 3 or 4. AF: Remote Alarm: The DCO will give an ‘auxiliary Alarm’ 4.PU Display pressure unit indication.
- Page 21 4.Pr Pressure Sensor Range 4.Cf Control function There is no need for the applied pressure to Determines if the DCO maintains control of the be static; it can be dynamic and changing. This compressors when the DCO is stopped. enables calibration to be carried out on a fully...
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Page 22: Operation
Alarm, Not Available Enter 7.2 Compressor Identification flashing Off Load Each compressor connected to the DCO will have a unique assigned compressor identification number; starting at compressor 1 on steady On Load (C1) increasing sequentially to the number of compressors connected to the DCO. - Page 23 7.12 Fault Codes: The next automated sequence change event will not be disrupted and will still occur In the event of a ‘Fault’ the DCO will display a when the sequence interval time expires. unique fault code. If more than one fault occurs only the most recent will be displayed.
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Page 24: Parts List
Metacentre DCO 8.0 Parts List Item Part No. Description Y08ENER02.00 Metacentre DCO2 Kit Y08ENER03.00 Metacentre DCO3 Kit Y08ENER04.00 Metacentre DCO4 Kit Y08CM32.00 Metacentre DCO2 Y08CM33.00 Metacentre DCO3 Y08CM34.00 Metacentre DCO4 Y08CM93.00 Controller, DCO2 Y08CM94.00 Controller, DCO3 Y08CM95.00 Controller, DCO4 Y07CM49.00 Gland, Set - Pg13.5... -
Page 25: Wiring Diagram
Technical Manual 10.0 Wiring Diagram 20 x 5mm 115-230Vac 60VA 50/60Hz +VDC 0VDC 240V 'CE' 115V 'UL' LED1b LOAD LOAD LED2 LOAD LOAD +L1 (A) -L2 (B) LED1 C018 4-20mA LED 1 RS485 Communications LED 1b Power Supply, DC OK LED 2 Short Circuit Indicator RT 1... - Page 26 Metacentre DCO Connection Diagram: 100m (330ft) max +24V DC A i1 4-20mA Load 30m (100ft) max +24V DC 0V DC Comp 1 3-core mi-P CB Load 30m (100ft) max +24V DC 0V DC Comp 2 3-core mi-P CB 30m (100ft) max...
- Page 27 Technical Manual Page 26...
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Page 28: Technical Assistance
Metacentre DCO Technical Assistance: Please read this manual first. If you require further technical assistance please contact your local dealer. Stamp with name and address of local dealer: Manufacturers Identification: Compressor & Machine Controls NV Industriepark De Bruwaan 37B B - 9700 Oudenaarde...
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