Hydro Solo E

Summary

Product identification

Grundfos Hydro Solo-E booster sets are complete pressure boosting systems. Each unit consists of one E-pump (CRE) with an isolating valve, non-return valve, discharge pipe, pressure transmitter, pressure gauge, and diaphragm tank. The booster set is delivered ready for operation and is available for 50/60 Hz operation.

Operating limits

• Liquid temperature: 0°C to +70°C
• Ambient temperature: 0°C to +40°C
• Maximum system pressure: 10 bar. The total of inlet pressure and pump head must not exceed this value.
• Maximum inlet pressure:
  • CRE 1, CRE 3, CRE 5: 10 bar
  • CRE 10, CRE 15, CRE 20: 8 bar (for some models) or 10 bar
  • CRE 32, CRE 45: 4 bar
• Minimum inlet pressure (to avoid cavitation): Calculated as H = (pb x 10.2 – NPSH – Hf – Hv – Hs), where:
  • pb = Barometric pressure in bar (can be set to 1)
  • NPSH = Net Positive Suction Head in metres head (from NPSH curve)
  • Hf = Friction loss in suction pipe in metres head
  • Hv = Vapour pressure in metres head
  • Hs = Safety margin of min. 0.5 metres head

Feed water

• Test liquid: Pure water
• Performance measurement temperature: +20°C

Electrical

• Enclosure class: IP 55
• Insulation class: F
• Mains connection:
  • Must be connected to an external mains switch.
  • The E-pump must always be correctly earthed.
  • Motors from 4.0 kW to 7.5 kW require especially reliable/sturdy earth connections due to an earth leakage current above 3.5 mA.
  • The pump requires no external motor protection; the motor incorporates thermal protection against slow overloading and blocking (IEC 34-11: TP 211).
  • The pump starts approximately 5 seconds after mains switch-on.
  • The number of starts and stops via the mains voltage must not exceed 4 times per hour.
• Earth leakage circuit breaker (ELCB) requirements for additional protection:
  • Single-phase: ELCBs must trip on earth fault currents with DC content (pulsating DC).
  • Three-phase: ELCBs must trip on earth fault currents with DC content (pulsating DC) and smooth DC earth fault currents.
• Typical supply voltage ranges:
  • 1 x 200-240 V, +/-10% (Max. 10 A)
  • 3 x 380-480 V, +/-10% (Max. 10 A)
• Electrical data by model: Motor power (kW) and full load current (A) are tabulated for each pump type and supply voltage. See the official PDF for exact tabulated values.

Mechanical / hydraulic

• Construction materials: Discharge pipe is stainless steel (EN/DIN 1.4401 or EN/DIN 1.4571).
• Components: CRE pump, diaphragm tank, pressure gauge, isolating valve for diaphragm tank and pressure gauge, isolating valve, discharge pipe, pressure transmitter, non-return valve, on/off-switch, nameplate.
• Installation requirements:
  • Install in a well-ventilated room.
  • Not suitable for outdoor installation.
  • Requires sufficient clearance around the booster set.
  • Position on an even and solid surface (e.g., concrete floor or foundation).
  • If not fitted with vibration dampers, it must be bolted to the floor or foundation.
  • Pipes connected to the booster set must be of adequate size.
  • Expansion joints and pipe hangers are recommended but not included in a standard set.
• Diaphragm tank:
  • Pre-charged to correct pressure upon delivery.
  • Recommended pre-charge pressure calculation: 0.7 x setpoint.
  • Pre-charge pressure must be measured in a pressureless system.
  • Recommended to refill the tank with nitrogen.
• Connections: Inlet and outlet connection types and sizes (e.g., Rp 1¼, Rp 1½, DN 50, DN 65, DN 80) are specified per model. See the official PDF for exact tabulated values.
• Dimensions and Weights: Height (mm), net weight (kg), gross weight (kg), and packing volume (m³) are tabulated for each pump type. See the official PDF for exact tabulated values.

Control

• Control options for CRE pumps:
  • Central management system (via LON-bus or GENIbus connection with G10-LON Interface).
  • Remote control (Grundfos R100) via IR-signal.
  • Control panel on the CRE pump terminal box.
• Purpose: Monitor and control system pressure, temperature, flow, and liquid level.
• Functions available via control panel: Setpoint, Start/stop, Max. curve, Min. curve, Operating indication, Fault indication.
• Functions available via R100 remote control: Setpoint, Start/stop, Max. curve, Min. curve, Controlled/uncontrolled, PI-controller, Signal relay, Operating range, Stop function, Operating indication, Pump status.

Accessories

• R100 Remote Control: Used for wireless communication via infrared light. Product number: 625333.
• Dry-running protection: Obligatory and mounted on site. Available types:
  • Automatic reset after water shortage (pressure switch ranges: 0.11-2 bar, 0.22-4 bar, 0.5-8 bar).
  • Manual reset after water shortage (pressure switch ranges: 0.11-2 bar, 0.22-4 bar, 0.5-8 bar).

Technical Data Summary

Detailed electrical data (motor kW, full load current), diaphragm tank size (litres), connection sizes (e.g., Rp 1¼, DN 50), overall height (mm), net and gross weights (kg), and packing volume (m³) are provided for specific Hydro Solo-E models (CRE 1-xx, CRE 3-xx, CRE 5-xx, CRE 10-xx, CRE 15-xx, CRE 20-xx, CRE 32-xx, CRE 45-xx). Performance curves (H vs Q, p vs Q, NPSH vs Q, P2 vs Q) are included for each CRE series. See the official PDF for exact tabulated values and performance curves.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must always match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror