Grundfos SQE 5-70 96510168 pompa głębinowa 3 cala z inwerterem 1x230V 1.85kW stal nierdzewna

FAQ (customer)

• Q: For what type of well can I use the Grundfos SQE 5-70?
  A: The SQE 5-70 is designed for narrow 3" boreholes and typical drilled wells used for domestic water supply and irrigation.
• Q: Does this pump keep water pressure constant in my house?
  A: Yes, when combined with the appropriate Grundfos controller, the integrated frequency converter allows the pump to maintain constant pressure despite varying water demand.
• Q: Can the pump run dry if the water level drops?
  A: The SQE series includes dry-running protection that stops the pump if the water level is too low, helping prevent damage.
• Q: Is the SQE 5-70 suitable for drinking water applications?
  A: The wetted components are made of stainless steel and approved materials, making the pump suitable for potable water where local regulations and certifications are met.
• Q: What kind of maintenance does this pump require?
  A: Under normal operating conditions the pump requires minimal maintenance, primarily periodic inspection of installation, electrical connections, and system components.
• Q: Can I use this pump for garden irrigation?
  A: Yes, the SQE 5-70 is well suited for garden and lawn irrigation systems, especially where stable pressure is important.

FAQ (expert)

• Q: How is constant pressure control implemented in the SQE 5-70 system?
  A: Constant pressure is achieved by the integrated VFD in the pump motor, which adjusts speed based on feedback from a pressure transducer via a Grundfos control unit, modulating frequency to maintain the setpoint.
• Q: What are the typical limits for sand content for the SQE series?
  A: The SQE line is designed for limited sand content typically in the range specified by Grundfos (e.g., up to tens of g/m³); exceeding this accelerates wear on floating impellers.
• Q: Which protection features are built into the pump electronics?
  A: Integrated electronics provide dry-running protection, overload protection, over- and undervoltage monitoring, and protection against locked rotor and excessive temperature.
• Q: How does soft start affect system design?
  A: Soft start reduces inrush current and water hammer, allowing smaller starting current demands on the electrical system and lower transient stress on pipes and fittings.
• Q: What installation orientation is recommended in deep-well applications?
  A: The pump is intended for vertical installation fully submerged in the water column, with sufficient clearance above the well bottom to avoid excessive intake of sediment.
• Q: Are there specific controller options recommended for the SQE 5-70?
  A: Grundfos controllers from the SQE family (such as CU-type constant-pressure units) are recommended to fully utilize the built-in frequency converter and monitoring capabilities.

Reviews

• The SQE 5-70 has provided stable pressure for a single-family home with no noticeable fluctuations during peak usage.
• Installers appreciate the integrated frequency converter, which reduces the need for external drives and simplifies wiring.
• Users report low noise levels since the pump is fully submerged and equipped with soft-start functionality.
• Several long-term installations show high reliability with minimal maintenance apart from routine checks.
• Homeowners value the dry-running protection, especially in shallow wells that experience seasonal level changes.
• HVAC and plumbing professionals note that constant pressure improves comfort and protects fixtures from pressure spikes.
• The compact 3" design allows retrofits in existing narrow wells where larger pumps would not fit.
• Energy consumption is considered favorable compared to fixed-speed submersible pumps in variable-demand systems.
• Some users highlight the need for correct controller setup to fully benefit from constant-pressure functionality.
• Overall satisfaction is high among both domestic and light-commercial users relying on the SQE 5-70 as their primary water supply pump.