The Grundfos CRE, CRIE, CRNE, CRKE, SPKE, MTRE series of pumps are designed for various applications, with installation and operating instructions detailed in accompanying documentation. These pumps support communication via GENIbus, Modbus RTU, and Bluetooth, and can be configured using tools like Grundfos GO, HMI 300, HMI 301, and Grundfos PC Tool E-products. The documentation emphasizes safety precautions during installation and operation, including electrical safety and proper handling of the equipment. The series includes models with factory-fitted pressure sensors (MLE160B..284TSC-42-K EDAP) and offers options for constant-curve control mode adjustment.
Installation Requirements and Safety Precautions
Installation of the Grundfos CRE series pumps requires adherence to specific safety guidelines. The documentation warns against fire hazards and the risk of crushing injuries during installation. Pumps must be securely fastened to a solid, even foundation according to the manufacturer’s specifications. When installing in areas with high humidity, a permanent connection to the power supply is recommended to prevent condensation.
The documentation highlights the importance of electrical safety. Connection to protective earth is mandatory, along with providing protection against indirect contact. Switching off the power supply, including the power supply for signal relays, is crucial before performing any electrical work. The documentation specifically warns against the risk of electric shock.
Lifting equipment used for handling the pumps must be rated for the product’s weight, and lifting should be done using the motor eyebolts. The documentation also notes the presence of a Safe Torque Off (STO) function, the version of which is marked on the product.
Mechanical Installation and Component Details
The motor features drain holes on the drive side, which can be turned 90 or 180 degrees to allow for self-venting, facilitating the escape of water and humid air. The documentation advises caution when supplying the product through an IT network, recommending consultation with Grundfos if there is any doubt about compatibility.
The control panel position can be adjusted by rotating the plastic cover 180 degrees, with a caution against twisting the cable more than 90 degrees during this process. The operating panel includes several buttons: Up/Down for setpoint adjustment, Communication for enabling radio communication with Grundfos GO and similar devices, and Start/Stop for controlling pump operation. The Start button initiates operation only if no other functions with higher priority are enabled.
Electrical Connections and Communication Protocols
The pumps can be connected to an external switch, while maintaining the internal EMC filter. Proper cable cross-section selection is essential for safe operation. The documentation emphasizes the need to connect the product to protective earth and provide protection against indirect contact in accordance with relevant electrical codes.
These pumps support multiple communication protocols, including GENIbus, Modbus RTU, and Bluetooth. Modbus RTU communication requires selecting a number between 1 and 247. Bluetooth connectivity can be initiated using Grundfos GO, particularly for Huawei smartphones with BLE version 5.0 or older. The product is equipped with an Ethernet port utilizing the GENI GDP protocol, enabling access to Grundfos iSOLUTION Cloud and other cloud-based solutions. Grundfos commits to providing security updates for at least two years from the production date.
Operating Modes and Control Panel Functions
The Grundfos E-pumps operate in various modes, including normal, min., and max. settings. Pumps equipped with pressure sensors are factory-set to constant-pressure control mode, which can be adjusted using Grundfos GO, HMI 300, HMI 301, or Grundfos GO Link. The setpoint value in constant-pressure mode corresponds to 50% of the sensor’s measuring range.
The control panel displays various parameters, including home display parameters, operating mode, actual controlled value, and status information. Measured values such as analog inputs, Grundfos Direct Sensor readings, and Pt100/1000 input values are also accessible. The documentation details how to change the pump’s operating curve between min. and max. settings using the control panel buttons.
Grundfos GO and Remote Control
Grundfos GO facilitates communication with the pump, enabling settings adjustments and data monitoring. The first time Grundfos GO communicates with the product, communication is enabled by pressing the Communication button or OK on the operating panel. Subsequent connections automatically recognize the product from a list menu.
The documentation outlines the use of Grundfos GO for setting analog and digital inputs, configuring pump changeover times in alternating operation scenarios, and resetting alarms. The pump can also be stopped using Grundfos GO, the R100, or a digital input configured for external stop functionality.
Troubleshooting and Maintenance
If the operating panel is cracked or perforated, it must be replaced immediately. The documentation advises contacting Grundfos sales for replacement parts. Regular maintenance includes keeping cooling fins and fan blades clean. The documentation notes that the pump operates at a manually set speed and illustrates minimum and maximum performance curves.
The documentation provides instructions for resetting the pump, including switching off the power supply, toggling external start/stop inputs, using Grundfos GO, or utilizing a digital input configured for alarm resetting.
Additional Considerations
The documentation references the importance of a suitable cover for outdoor installations, protecting the motor from direct sunlight, rain, and snow. Grundfos does not supply covers and recommends custom-built solutions for specific applications. The documentation also mentions the possibility of alternating operation between two motors, controlled by time or other parameters set via Grundfos GO.
Conclusion
The Grundfos CRE, CRIE, CRNE, CRKE, SPKE, and MTRE series pumps offer a range of features and control options, facilitated by tools like Grundfos GO and support for multiple communication protocols. Proper installation, adherence to safety guidelines, and regular maintenance are crucial for optimal performance and longevity. The documentation provides detailed instructions for these aspects, emphasizing electrical safety and the importance of using appropriately rated equipment.