Grundfos DPC 1-1 - User Manual

The Grundfos DPC 1-1 is a Digital Pump Controller designed for single-phase pumps, including monoblock and submersible types, with a capacity of up to 15 Amperes. This programmable device offers ease of use and comprehensive control for various water and wastewater applications.

Function Description

The DPC 1-1 serves as a central control unit for pumps, enabling automated operation and protection. Its primary function is to manage pump activity based on liquid levels or pressure, ensuring efficient water transfer, tank filling, tank emptying, and pressure boosting in hydro-pneumatic systems. The controller is equipped with a range of protective features to safeguard the pump and ensure its longevity.

Usage Features

The DPC 1-1 is highly versatile and suitable for residential, industrial, and institutional settings where water and energy conservation are priorities.

Control Modes:

Manual Mode: Allows users to manually start and stop the pump using the START and STOP keys, respectively. In this mode, the controller does not respond to signals from float switches or pressure switches.
Auto Mode: The pump operates automatically based on signals received from sensors, such as float switches or pressure switches. This mode is ideal for continuous, unattended operation. If the pump is running in Auto mode and needs to be stopped, the user can switch to Manual mode.

Application Versatility: The controller can be configured for different applications by adjusting DIP switch settings:

Water Supply (Liquid Level Control): Utilizes probes or float switches to maintain desired liquid levels in tanks. The pump starts when the liquid level in the overhead tank falls below the lower probe (or float is down) and the underground tank level is above the lower probe (or float is up). It stops when the overhead tank reaches the upper probe (or float is up) or the underground tank level falls below the lower probe (or float is down).
Water Supply (Pressure Control): Employs a pressure switch and pressure tank for applications like pressure boosting. The pump starts when the pipeline pressure drops below the set point of the pressure switch and the liquid level in the well/supply tank is above the lower probe (float switch up position). It stops when the pressure reaches the set point.
Drainage (Liquid Level Control): Configured for emptying sumps or tanks using float switches. The pump starts when the "Float switch A" reaches the up position and stops when it reaches the down position. An overflow alarm is triggered if the level in the sump rises to "Float switch B" (up position) even while the pump is draining, alerting the operator.

Sensor-Free Dry Run Protection: For submersible pumps in deep wells, the DPC 1-1 offers reliable and automatic protection against dry running even without external sensors. Users can achieve this by shorting terminals 1, 2, and 3.

Display and Alarms: The LCD screen provides real-time pump running information, including voltage, current, and operational status. It also displays fault conditions with visual and audio alarms, ensuring prompt awareness of any issues. Icons on the LCD indicate parameter configuration, time display (e.g., pump dry run trip time), and pump fault conditions.

Maintenance Features

The DPC 1-1 incorporates several features that simplify maintenance and enhance reliability.

Calibration: The controller requires calibration to adapt to the connected pump's load. This process involves switching to manual mode, ensuring the pump is not running, then starting the pump to confirm its operation and current draw. A subsequent step involves pressing and holding the START key to initiate a countdown timer, after which the pump stops, and calibration is complete. This ensures the controller accurately monitors the pump's performance.

Erasing Parameters: Whenever a pump is repaired or a new pump is installed, previous calibration parameters must be erased. This is done by switching to manual mode, ensuring the pump is not running, and then pressing and holding the STOP key. This action resets the unit to factory settings, indicated by a flashing "NO CALIBER" sign on the LCD, preparing it for re-calibration.

Protections and Automatic Recovery: The DPC 1-1 offers comprehensive protection mechanisms:

Overload Protection: Detects when the pump draws current higher than the calibrated level.
Motor Stalled Protection: Identifies if the pump impeller is jammed or the motor is dragging.
Dry Run Protection: Prevents the pump from running without water, either without a float/probe or when the liquid level falls below the pump intake.
Under/Over Voltage Protection: Safeguards the pump from voltage fluctuations (fixed settings).
Transient Surge Protection: Protects against sudden voltage spikes.
Short Circuit Protection: Detects and responds to short circuits.

In case of a fault (dry run, overload, under/over voltage, etc.), the controller immediately stops the pump, displays the fault on the LCD, and automatically initiates a check for restarting conditions after a built-in time delay. The unit recovers automatically once abnormal conditions are cleared. Recovery times for dry run and overload can be adjusted, while under/over voltage recovery times are factory set. To immediately reset the controller without waiting for the recovery time, the power supply can be cut off and switched back on.

Memory Function: The controller retains its operational mode (Auto or Manual) and settings even after a power cut. When power is restored, the unit resumes operation in the same mode after a 10-second delay, ensuring continuous service.

Capacitor Installation: For Grundfos Submersible Pumps with PSC motors, a running capacitor is required. The manual provides specific capacitor ratings based on motor kW and detailed mounting instructions. This includes opening the cover, housing the capacitor in its holder, connecting cables to the specified terminals, and ensuring proper cable routing to avoid disturbing existing components. Adhering to these guidelines and using recommended capacitor types is crucial for warranty validity and optimal pump performance.

Grundfos DPC 1-1 Specifications

General

Category	Controller
Brand	Grundfos
Protection Class	IP65
Weight	0.5 kg
Power Supply	230 VAC, 50/60 Hz
Operating Temperature	0-50 °C
Humidity	95% RH non-condensing