Calio Therms

Summary

Product identification

The KSB Calio-Therm S is a high-efficiency drinking water circulator pump.

Designation Key (Example: Calio-Therm S 25-40)

• Calio S: High-efficiency pump
• Therm: Drinking water pump
• 25: Nominal diameter of pipe connection R 1
• 40: Head in m x 10 (e.g., 4 m = 40)

Operating limits

• Flow rate (Q): ≤ 3.5 m³/h (≤ 1.0 l/s)
• Head (H): ≤ 6 m
• Fluid temperature (T): 2 - 95 °C
• Ambient temperature (T): 0 - 40 °C
• Operating pressure (p): ≤ 10 bar
• Sound pressure level: < 45 dB (A)

Minimum Pressure (at pump suction nozzle to avoid cavitation)

• For fluid temperature 5 to 75 °C: 0.05 bar
• For fluid temperature 76 to 95 °C: 0.28 bar
• Note: These values are applicable up to 300 m above sea level. For installations at altitudes > 300 m, an allowance of 0.01 bar / 100 m must be added.

Feed water

• Fluids handled: Drinking water and water for the food and beverage industry, as per German 2001 drinking water regulations.

Electrical

• Drive: High-efficiency electric motor with continuously variable differential pressure control; Electronically commutated synchronous motor with permanent magnet rotor.
• Voltage/Frequency: 230 V - 50/60 Hz
• Enclosure: IP42
• Thermal class: F
• Temperature class: TF 95
• RFI emission: EN 55014-1
• Interference immunity: EN 55014-2
• Motor protection: Integrated in the terminal box.

Technical Data by Model

• Calio-Therm S 25-40
  • Power (P1): 4.0 - 23 W
  • Nominal current: 0.06 - 0.23 A
• Calio-Therm S 25-60
  • Power (P1): 4.0 - 47 W
  • Nominal current: 0.05 - 0.48 A

Mechanical / hydraulic

• Design: Highly efficient, maintenance-free wet rotor pump (glandless), screw-ended.
• Piping connection: R 1
• Pump connection: G 1 ½
• Permissible installation positions: All
• Weight: 2.8 kg (for both 25-40 and 25-60 models)

Materials

• Volute casing: Stainless steel
• Shaft: Ceramics
• Impeller: Polyamide (PA - GF 35)
• Bearing: Ceramics
• Bearing plate: Stainless steel 1.4301
• Can: Stainless steel 1.4301
• Thermal insulation shell: Polypropylene

Dimensions (Screw-ended pumps)

• Overall length: 180 mm
• Height: 169 mm
• Width: 132 mm
• Connection to connection: 99 mm
• Piping connection (R): 1
• Pump connection (G): 1 ½

Features and Functions

Operating Modes

• Δp-v for variable differential pressure
• Δp-c for constant differential pressure
• Fixed speed operation (n = constant)

Manual Functions

• Setting the operating mode
• Setting the differential pressure setpoint
• Setting of speed level
• Vent plug
• Deblocking option

Automatic Functions

• Continuous output adjustment depending on the operating mode (Δp control)
• Setback operation
• Soft start (limitation of starting current)
• Full motor protection with integrated trip electronics

Signalling and Display Functions

• Error codes indicated on the display
• Alternating display of flow rate and electrical input power

Certifications

• Label: "Handwerkermarke" (Effective in Germany for all sizes)

Scope of supply

• Pump
• Sealing elements
• Installation and operating manual
• Thermal insulation shells

---

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

Official datasheet (PDF)

Lenntech datasheet mirror