Megacontrol

Summary

Product identification

The product is a control unit identified as Megacontrol, manufactured by DP-Pumps. This manual is valid for Megacontrol version V1.7.1 and later.

Operating limits

• Maximum ambient temperature: 50 °C
• Relative atmospheric humidity: 20 - 90 % (no condensation)
• Intended use: Controlling a Hydro-Unit consisting of 1, 2, 3, 4, 5 or 6 pumps within the indicated working range.

WSD-Sensor (option)

• Maximum ambient temperature: 30 °C
• Medium temperature: 5 - 30 °C
• Switching flow: ± 14 l/min

Electrical

• Voltage: 1 x 230 V AC ± 5%
• Frequency: 50/60 Hz
• RS485-termination:
  • For 1-6 DANFOSS Micro-Drives: Megacontrol T+/T- clamps open; Microdrives bus termination switch to ON on each drive.
  • For 1-2 DANFOSS AQUA Drives: Megacontrol T+/T- clamps open; AQUA Drive bus termination switch to ON on each drive.
  • For 3-6 DANFOSS AQUA Drives: Megacontrol T+/T- clamps open; AQUA Drive bus termination only on the last drive; external active bus termination (e.g., 6ES7 972-0DA00-0AA0 or FBCon DP M12 Term 24V) placed near the Megacontrol.
• Contactors: When using contactors and/or auxiliary relays, always place a suitable RC filter or varistor across the coil (e.g., Siemens 3RT29-16-1CD00).

Features & Functionality

The Megacontrol is an intelligent control unit designed for pressurization systems with a maximum of 6 pumps. It senses the required system pressure via an outlet-side pressure sensor. Pumps are switched on when pressure drops below the set point and switched off one at a time when the required pressure is reached. The minimum run time is constantly optimized for energy saving.

• Pump Management:
  • Determines pump activation/deactivation based on current operating hours, ensuring equal wear across all pumps, including backup.
  • Includes an automatic test run procedure to prevent pumps from prolonged standstill.
• Programming & Interface:
  • Programmable via a Human Machine Interface (HMI) operating panel or a service port (requires special service port cable Art. nr. 6147117698).
  • HMI features a back-lit display, function keys (Operation, Diagnosis, Settings, Information), navigation keys, and LEDs (Red: Alert, Amber: Warning, Green: O.K.).
  • Access levels: Standard, User (default password 7353), Service, and Factory. The system automatically returns to the default access level after ten minutes of inactivity.
• Optional Sensors:
  • WSD-Sensor: Can generate a failure message if insufficient refreshment of the membrane switch vessel occurs, the membrane is defective, there is no air in the vessel, or the installation is incorrectly set/installed. Supports installations with a maximum of 3 membrane switch vessels.
  • Temperature-sensor: Can generate temperature-dependent failure messages.
• Manual Operation: Allows manual operation of pumps for 10 seconds, after which the pump operation mode changes to Disabled (off) for protection.
• Fault Management: Provides functionality to retrieve and reset fault messages via the 'Diagnosis' hot key, including current and historical faults with date/time stamps.

Hydro-Unit Configurations

The Megacontrol supports various Hydro-Unit configurations, each with specific parameter settings:

• Hydro-Unit MC: For fixed speed systems, typically with a bandwidth of 30 and an optimal pump starts/hour of 10.
• Hydro-Unit MC++: Similar to MC but with a bandwidth of 50 and an optimal pump starts/hour of 30.
• Hydro-Unit MCJ: Features a jockey pump for installations with fluctuating water consumption. The jockey pump starts first, with main pumps engaging as needed.
• Hydro-Unit MCF: Equipped with one variable frequency drive (VFD) and an integrated PID-controller to maintain constant system pressure. Pumps switch on at 100% speed and off at 0% speed.
• Hydro-Unit MCMF: Equipped with multiple VFDs, utilizing an integrated PID-controller for constant system pressure. Supports various Danfoss VFD communication protocols.
• Hydro-Unit PumpDrive 2 Eco: Equipped with multiple VFDs (PumpDrive 2 communication) and an integrated PID-controller. Features detailed motor and VFD parameter settings, including nominal power, voltage, frequency, current, and RPM.
• Hydro-Unit Level control: Configurable for supply valve ON/OFF or proportional control based on water levels, with parameters for high, critical, low water levels, and thresholds. Threshold 1/2 contacts are available with MCIII 6 pumps version when using a maximum of 4 pumps.

Note: Specific parameter values for each Hydro-Unit configuration, including set points, bandwidths, run times, and VFD settings, are detailed in the official PDF.

Parameter Explanations

The manual provides explanations for various parameters, including:

• Pressure Settings Set Points: Defines set point, bandwidth, switch-off, and switch-on pressures for both fixed and variable speed systems.
• Delta P Correction: Formulas for calculating new set points based on the main set point, Delta P value, total number of pumps, and number of active pumps.
• Special Input/Output (I/O):
  • Inputs: External off, Fire Alarm, Thermal Failure (TH.FAIL. P1-P6), WSD inputs (Input1-3), Run-Dry Protection (RDP), and TFR.
  • Definable Inputs (WSD 1-3): When not used for WSD, these digital inputs can be configured for functions such as Check run, Alternate set point, Leakage detection, Remote Acknowledge, By-pass valve control, or External power operation (e.g., generator mode).

Mechanical / hydraulic

For correct overall dimensions and mechanical installation details, consult the "Built-in diagram" in the annex of the official PDF.

---

Disclaimer: This summary is based solely on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror