Dometic EVC2-PT Installation And Operation Manual
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Dometic EVC2-PT Installation And Operation Manual

Shipwide ventilation control
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MARINE
VENTILATION SYSTEMS
EVC2-PT
Shipwide Ventilation Control
EN
Installation and Operation Manual

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Summary of Contents for Dometic EVC2-PT

  • Page 1 MARINE VENTILATION SYSTEMS EVC2-PT Shipwide Ventilation Control Installation and Operation Manual...

  • Page 2: Table Of Contents

    Dometic Corporation 2000 N Andrews Ave. Pompano Beach, FL 33069 Form No. 340499 L-5120 6/18 | ©2018 Dometic Corporation Read these instructions carefully. These instructions MUST stay with this product. CONTENTS Explanation of symbols and safety instructions ..........3 Intended use .

  • Page 3: Explanation Of Symbols And Safety Instructions

    Ventilation Systems EXPLANATION OF SYMBOLS AND SAFETY INSTRUCTIONS This manual has safety information and instructions to help you eliminate or reduce the risk of accidents and injuries. 1.1 Recognize safety information This is the safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

  • Page 4: Intended Use

    Ventilation Systems 2 INTENDED USE The EVC2 Series controls the ventilation system of a vessel’s engine room, with an easy-to-use interface for manual operation, system monitoring, and troubleshooting. The ventilation system is designed to maintain a specified engine room temperature, pressure, or both. With an optional ambient air temperature (AAT) sensor, the EVC2 can provide complete control of engine room ventilation.
  • Page 5 ➤ Mount the MPE with the pressure sensing ports facing straight down or straight up, when looking at the front of the enclosure. Avoid mounting the MPE on an angle, to ensure that the pressure sensor works properly. If the MPE cannot be mounted in this position, contact Dometic Technical Support for alternative mounting options.
  • Page 6 Ventilation Systems 6" Enclosure (150 mm) minimum 2" (50 mm) minimum 2" (50 mm) minimum Enclosure 6" (150 mm) minimum Air Flow Connecting the VFD power ➤ Refer to the following tables for recommended minimum wire sizes. ➤ Check all recommendations to ensure that they meet applicable codes and regulations. In some cases, the recommended wire sizes are slightly larger then the normal wire size for a given motor HP.
  • Page 7 Ventilation Systems 440 V – 480 V Fan Size Single-Phase Vessel Three-Phase Vessel Output to Fan Up to 2 Hp — 16 AWG 16 AWG 3 Hp — 16 AWG 16 AWG 5 Hp — 14 AWG 14 AWG 7.5 Hp —...

  • Page 8: Operation

    Ventilation Systems 4.7 Connecting external switch inputs The EVC2 requires several external signals for proper operation. These signals come from switches that should run through dedicated dry contacts and should not be grounded to the vessel’s main electrical ground. All external switches are provided by the installer.
  • Page 9 Ventilation Systems ➤ Once the reading is verified, place the system in AUTO mode and press the Run Mode button. The system is now in the AUTO-RUN mode, which is the normal operating mode while the main engines are running. ➤...
  • Page 10 Ventilation Systems 5.3 Operation modes Mode Description AUTO Mode In normal day-to-day operation, the system should be left in auto-run or AUTO-DOCK mode. When the main engines are OFF, the system is in AUTO-DOCK mode, which provides ventilation of the space with (RUN/ low noise and electrical loads.
  • Page 11 Ventilation Systems Mode Description AUTO-RUN Once the engines are running, the exhaust and intake fans increase or decrease their speeds to maintain the pressure and temperature setpoints. The intake fan speed is based on the difference in pressure between the engine room and the outside atmosphere.
  • Page 12 Ventilation Systems Mode Description MANUAL Enter MANUAL mode at any time by pressing the Manual button on the bottom of the screen. MANUAL mode provides independent control of the speed and direction of both the intake and exhaust fans. Mode Temperature and pressure are displayed for reference on this screen, but no fan speed control is performed by the EVC2.
  • Page 13 Ventilation Systems Mode Description STOP Mode CUT HAZARD. STOP mode does not guarantee that the fans will remain OFF. If the main engines are started, the system reverts to AUTO mode and the fans are started again. Before doing (STANDBY) any maintenance around the fans, place the system into MAINTENANCE mode and disconnect the main power supply to the variable frequency drives (VFDs) that control each fan.
  • Page 14 Ventilation Systems Mode Description Maintenance Enter MAINTENANCE mode at any time by accessing the "Other Mode Options" screen and pressing the activation button for the mode. Once activated, the engine room status is displayed, but the fans are Mode stopped. While in this mode, all physical inputs and outputs are disabled. The system does not switch back to AUTO mode even if an engine running signal activates.
  • Page 15 Ventilation Systems Mode Description SIMULATION In this mode, the system overwrites the engine running input signal, as well as the pressure and temperature inside the room, so the user can simulate an AUTO-RUN or AUTO-DOCK mode situation Mode when the engines are actually OFF. This is mainly used to tune the PID loops or simulate alarms when setting up a new system.
  • Page 16 Ventilation Systems System general options Option Description Boat Name Add a boat name to the main screen of the system or screen saver. Room Type Select the room in which the ventilation system will be installed. Power Select this option to restart the system automatically in the most recent mode set before a power failure occurred.
  • Page 17 Ventilation Systems System general options 2 Option Description Display Increase or decrease the display brightness. Brightness Set Date Set the date and time in the system. Time Emergency Select the type of emergency stop button and wiring to be used as the E-stop button. If no E-stop button is installed, the option should be left disabled (normally open).
  • Page 18 When the system switches to AUTO-RUN mode, the fans return to forward operation. • The Full option should not be selected unless the system has been specifically designed by Dometic to operate as a reversible system. Pressure •...
  • Page 19 Ventilation Systems Option Description Positive and Used to modify the minimum and maximum room atmospheric pressure. Negative Pressure Setpoint Alarms Positive and Used to add a delay before the system generates a pressure alarm. Negative Pressure Alarm Delays Temperature Used to modify the room temperature setpoint of the system. This setpoint is the temperature on which the exhaust fan speed is based.
  • Page 20 Ventilation Systems Screen Description Security The security login pop-up allows a user to log into the system using the factory default credentials. Three different security levels are pre-configured: FACTORY: Security Level 20 – Permission to change high-level parameters TECH: Security Level 15 – Permission to change mid-level configurable parameters OPER: Security Level 10 –...
  • Page 21 Ventilation Systems Screen Description Factory Reset The system parameters may be changed back to the factory default by an installer, dealer, or end user. ➤ To restore the original factory default parameters manually, press the Factory Defaults button and then press the OK button.
  • Page 22 Ventilation Systems Screen Description AUTO-RUN Pressure setpoint: The target engine room pressure. Mode Options Positive and negative pressure alarm: Used to modify the minimum and maximum room (Basic) atmospheric pressure. High temperature alarm: Sets the point at which the system will issue a high-temperature alarm. Room temperature setpoint: The temperature setpoint that the system will try to maintain in the engine room.
  • Page 23 Ventilation Systems Screen Description AUTO-RUN AUTO-RUN mode options are used to assist the engine with more combustion air in situations like throttling or initial vessel take off. Mode Options (Advanced) Auto reverse option: (adjustable range 80%–100%) When the engine running signal is active, all fans work as normal.
  • Page 24 Ventilation Systems Screen Description AUTO-DOCK Temperature shutdown: When in AUTO-DOCK mode, the exhaust fans keep running based on the temperature shutdown setpoint. Once the room is below the temperature shutdown setpoint, the Mode Options exhaust fans stop. This value should always be smaller than the temperature restart value. Temperature restart: When in AUTO-DOCK mode, the exhaust fans start based on the restart temperature setpoint.
  • Page 25 Ventilation Systems Screen Description MANUAL Fan speed increment percentage: Select to change the fan speed increment percentage. Mode Options Restart MANUAL mode: When the system restarts while in MANUAL mode, the direction of the fans can be set to forward or to previous mode.
  • Page 26 Ventilation Systems Screen Description Other Mode BYPASS mode: Used to bypass the initial functionality of an E-stop button or fire alarm signal. Once selected, the system cannot return to normal operation until the situation that caused the alarm is Options corrected.
  • Page 27 Ventilation Systems Screen Description Motor Options VFD brand & model: Select the brand and model of the VFD (Schneider ® 312 or 320, or Allen Bradley ® 4 or 4M). (VFDs) Number of VFDs: Set the number of VFDs that are connected via Modbus to the system. Drive: Select between intake and exhaust functionality.
  • Page 28 Ventilation Systems Screen Description Other Motor Inside room circulation fan: Select to enable an air-circulation room fan (PLC DO1). Options (Non- Enclosure ventilation fan: Some control enclosures require cooling and air circulation to avoid VFDs) overheating the equipment. Select to enable a ventilation electrical enclosure fan (PLC DO2). Enclosure fan temperature ON/OFF: Select to specify the setpoints to turn the enclosure fan ON or OFF.
  • Page 29 Ventilation Systems Screen Description Intake PID Default values are optimal for most systems. Loop Options Gain, reset, and rate: Used to tune the PID loop. Changing these values is generally not required. Pressure: Shows the current pressure reading. Switch to (dock or run) mode: Used to select which PID parameters to change, either for DOCK or RUN mode.
  • Page 30 Ventilation Systems Screen Description Exhaust PID Default values are optimal for most systems. Loop Options Gain, reset, and rate: Used to tune the PID loop. Changing these values is generally not required. Temperature: Shows the current temperature reading. Switch to (dock or run) mode: Used to select which mode PID parameters to change, either for DOCK or RUN mode.
  • Page 31 Ventilation Systems Screen Description Fire Dampers This system can control and monitor fire dampers through the VFD I/O terminal of the specific motor, if the motor is controlled through Modbus communications. Also, if the motors are controlled through the PLC outputs, the dampers can be controlled and monitored through the PLC I/O terminals. Damper option ON/OFF: Activates the control and monitoring of the fire dampers either through VFD or PLC I/O terminals.
  • Page 32 Ventilation Systems Screen Description Security Setup The security setup pop-up allows the user to set a new user ID, PIN, and security level for accessing the system. The PIN entry is required every time the system enters SLEEP mode or after five minutes of touchscreen inactivity.
  • Page 33 Ventilation Systems Motors, I/Os, and alarms statuses The EVC2 control has several features that are designed to assist in monitoring and troubleshooting a system malfunction. The system inputs and outputs, and many VFD and other motor operation parameters, can be viewed directly.
  • Page 34 Ventilation Systems Mode Description System Inside air temperature sensor: Indicates the state of the optional E-stop button. Analog Outside air temperature sensor (opt): Indicates the state of the main engine(s). Inputs Pressure differential sensor: Indicates the state of the fire extinguishing system. Backup pressure differential sensor (opt): Indicates the state of the optional bypass switch.
  • Page 35 Ventilation Systems Mode Description System The output screen shows the status of the output signals the EVC2 control logic is activating. If an output is abnormal, it will be flashing. In most systems, only one or two of these outputs is utilized, as the majority of Output the signals are being transferred to the VFDs across the DH-485 communications network.
  • Page 36 Ventilation Systems Mode Description VFD Status The drive status screen shows the status of the VFDs. The information displayed includes: • VFD drive number: Indicates whether the VFD is assigned to an intake (even number) or an exhaust (odd number). •...
  • Page 37 Ventilation Systems Mode Description Other This screen allows the user to check the status of analog-controlled motors. Motors Circulation fan: Indicates when the room circulation fan is ON or OFF. Status Enclosure exhaust fan: Indicates when the enclosure exhaust fan is ON or OFF. (System Analog motor control active (0–10 VDC or 4–20mA): Indicates whether the option is active and the Analog...
  • Page 38 Ventilation Systems Mode Description...

  • Page 39: Disposal

    International Sales and Service Telephone: +44 (0) 870-330-6101 For all other areas visit our website to find your nearest distributor at www.dometic.com. 8 LIMITED WARRANTY LIMITED WARRANTY AVAILABLE AT dometic.com/warranty. IF YOU HAVE QUESTIONS, OR TO OBTAIN A COPY OF THE LIMITED WARRANTY FREE OF CHARGE,...

  • Page 40: Appendix

    Ventilation Systems 9 APPENDIX 9.1 Alarm descriptions and test methods Alarm Type Description Test Methods Negative The EVC2 issues a negative pressure Intake restriction alarm when the system detects pressure Pressure ➤ Turn OFF one of the intake VFDs at the breaker panel. A of .400"...
  • Page 41 Ventilation Systems 9.2 Wiring diagrams System block diagram MPE Power Supply 110–240 VAC Single Phase, 5 Amps Operator Interface Break Glass Switch Cable 6 Type B (Touchscreen) or Emergency Stop Main Engine System Alarm Normally Open Output 24 VDC Cable 5 Type B 100 mA Max Main Processor (Optional)
  • Page 42 Ventilation Systems Drive network options GOOD Termination Resistor Termination Resistor Main Processor VFD 1 VFD 2 VFD 3 Enclosure Termination Resistor Termination GOOD Resistor Main Processor VFD 1 VFD 2 VFD 3 Enclosure Termination Resistor Termination Resistor Main Processor VFD 1 VFD 2 VFD 3 Enclosure...
  • Page 43 Ventilation Systems...
  • Page 44 DOMETIC MARINE DIVISION 2000 N. Andrews Ave. Ext. Pompano Beach, FL 33069 USA Tel. 954-973-2477 | Fax 954-979-4414 Email: MarineSales@Dometic.com 24/7 TECH SUPPORT FOR UNITED STATES & CANADA 8:00 AM - 5:00 PM EST: 800-542-2477 After hours and weekends: 888-440-4494 INTERNATIONAL SALES &...

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