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Wilo-RainSystem AF 150 | Wilo

Wilo-RainSystem AF 150

Convenient rainwater utilisation in multi-residential buildings and small commercial businesses.

Your advantages

Convenient rainwater utilisation in multi-residential buildings and small commercial businesses.

Through the targeted use of rainwater, the Wilo-RainSystem AF 150 is a particularly sustainable system for saving drinking water. The factory pre-assembled system can be installed quickly and put into operation swiftly using the RainControl Professional switchgear. The system is equipped with a replenishment reservoir with a volume of 150 litres for continuous operation. It switches automatically to drinking water replenishment if the rainwater level is low in the rainwater storage tank. Low energy consumption is ensured by the Wilo-Medana CH1-LSP integrated, self-priming centrifugal pump with IE2 motor technology in combination with the flow-optimised design of the replenishment reservoir. The power supply in the low-voltage range, self-protection routines (such as dry-running protection) and corrosion-resistant components provide for a high degree of operational reliability and durability. The quiet operation allows applications directly in the living area.

Your advantages

  • Compact, factory pre-assembled design enables easy installation
  • Simple and intuitive operation via the RainControl Professional switchgear
  • Automatic replenishment with drinking water permits reliable, continuous operation even in drought conditions
  • Flow-optimised design and deployment of IE2 motors enable energy-saving operation
  • Self-protection routines, control in the low voltage range and the use of corrosion-resistant components facilitate high operational reliability
  • Maintenance notifications in the fault display via LCD messages
  • Quiet operation for high level of user comfort
Series description
RainSystem AF 150 -2 LSP 204-405


Automatic rainwater utilisation system with fresh water replenishment reservoir (150 litres) and 2 self-priming pumps from the Medana CH1-LSP series


  • Rainwater utilisation in multi-residential buildings and small commercial enterprises for conserving drinking water in conjunction with rainwater storage tanks or basins


  • 2 self-priming, corrosion-free, low-noise centrifugal pumps from the Medana CH1-LSP series
  • Fresh water replenishment reservoir (150 litres) with mechanical float valve
  • Throughflow diaphragm expansion tank conforming to DIN 4807 for energy savings if there are very small leaks in the building
  • RainControl Professional control unit with electronics including solenoid valve, pressure transmitter 4–20 mA and level sensor with 20 m cable for fill level monitoring
    • Menu-prompted operation (function keys)
    • LC display (run signals and fault messages)
    • Steady system control by means of cyclical pump cycling and integrated test run on idle pumps
    • Automatic fault-actuated switchover and peak-load cut-in
    • Automatic water exchange in the replenishment reservoir
    • fully automatic drinking water replenishment optimised for requirements
    • integrated electronic motor protection,
    • integrated dry-running protection of the pump unit
    • Automatic calcination protection of the solenoid valve
    • Permanent display of rainwater storage level, system pressure and operating status via LCD



Wilo-RainSystem AF 150-2Medana LSP204/RCP


System for rainwater utilisation for commercial use


Series (Aqua Feed)


Nominal content (l) of replenishment reservoir


Number of pumps

Medana LSP

Pump series


Rated volume flow (m3/h)


Number of single pump stages


Control device for RainControl Professional

Technical data

  • Mains connection: 1~230 V (±10%), 50 Hz
  • Max. negative suction head: 8 m
  • Max. operating pressure: 8 bar
  • Protection class: IP54
  • Connections:
    • Discharge manifold R 1 ½
    • Inlets R 1 ¼, suction side inlets R 1 ¼
    • Overflow connection DN 100


  • Pump housing: Stainless steel 1.4301
  • Impeller: Noryl
  • Shaft: Stainless steel 1.4031
  • Mechanical seal: Ceramic/carbon
  • Stage chambers: Noryl
  • Diaphragm expansion tank: Steel, painted


Ready for connection rainwater utilisation system in compact construction, with full electric and hydraulic connections already in place and installed on vibration-insulated painted tubular steel frame.

Pipework: R 1 1/2 discharge manifold, including transmitter unit with 8 l diaphragm expansion tank following the volume-flow principle and shut-off device with draining, manometer 0 – 10 bar, and ball valve on the suction and discharge side. High operational reliability due to two separate suction lines (to be created on-site).

High-volume replenishment reservoir for needs-based replenishment with drinking water in the consumer network when rainwater storage tanks are not full.

Connection for backflow warning is available as standard.

Pumps: 2 self-priming, corrosion-free, low-noise centrifugal pumps from the Medana CH1-LSP series.

Operation and parameterisation of the all-electric controller RainControl Professional is done using menu-operated function keys. Display of extensive messages. Available potential-free contacts for collective operation and collective fault signals.

Scope of delivery

  • Factory-mounted rainwater utilisation system ready for connection
  • Level sensor with 20 m cable, measurement range 0 to 5 m
  • Installation and operating instructions


  • Individual run/fault signals
  • Backflow signal

Installation and operating instructions

Wilo-Medana CH1-LSP

Article Number 4263617
Edition 08/2023
Number of pages 24
Language en
PDF (5 MB)