Wilo-RainSystem AF 400
Make use of rainwater comfortably in large buildings.
Make use of rainwater comfortably in large buildings.
Through the targeted use of rainwater, the Wilo-RainSystem AF400 is a particularly sustainable system for saving fresh water. The factory pre-assembled system can be installed quickly. The EC switchgear and Green Button Technology allow it to be put into operation swiftly.
The system is equipped with a replenishment reservoir with a volume of 400 litres for continuous operation. It switches automatically to drinking water replenishment if the rainwater level is low.
Low energy consumption is ensured by the Wilo-Medana CH1-L integrated, non-self-priming centrifugal pump with IE2/IE3 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 system can be integrated in an existing building management system via a Modbus RTU interface. Extended communication via a gateway is optionally available.
Recommended services
Your advantages
- Compact, factory pre-assembled design enables easy installation
- Simple and intuitive operation via EC switchgear combined with Green Button Technology
- Automatic replenishment with drinking water permits reliable, continuous duty even in drought conditions
- Energy-saving operation by means of the flow-optimised design and the use of IE2/IE3 motors (Medana CH1-L) or IE5 motors (Medana CH3-LE, Helix2.0 VE)
- Self-protection routines, control in the low voltage range, the use of corrosion-resistant components and the optional integration into a building management system facilitate high operational reliability
- Maintenance notifications in the fault display via error codes
- Remote monitoring possible through the integration into building automation via standard Modbus and optional extended communication via a gateway
- Quiet operation for high level of user comfort
Product features
- Drinking water replenishment connection
- Fully electronic EC switchgear (Easy Control) with Modbus RTU interface
- Optional Gateway for remote monitoring
- Hybrid replenishment reservoir (volume: 400 litres) with overflow conforming to EN 1717 (free drain type AA)
- Diaphragm expansion tank (8 litres)
- Flexible connections on the discharge side
- Wilo-Medana CH1-L non-self-priming centrifugal pumps with IE2/IE3 motors
- Pre-assembled system on baseplate with height-adjustable pedestal
Design
Automatic rainwater utilisation system with hybrid replenishment reservoir with a volume of 400 litres and 2 non-self-priming, horizontal, multistage centrifugal pumps from the Medana CH1-L, Helix2.0 VE or Medana CH3-LE series. System installed on a vibration-insulated baseplate in a compact design including an 8-litre diaphragm expansion tank and fully electronic EC control unit (Easy Control) with control electronics and level control from up to two feeding pumps (ordered separately) (storage tank pump, 3~ 400 V).
Application
Commercial and industrial rainwater utilisation for conserving drinking water as a hybrid system in conjunction with rainwater storage tanks or vessels
Equipment/function
- Module in compact design that is ready for connection, electronics and hydraulics already hooked up
- Vibration-insulated baseplate with height-adjustable pedestal, made up of:
- Two non-self-priming, corrosion-free, low-noise centrifugal pumps from the Medana CH1-L, Helix2.0 VE or Medana CH3-LE series
- Large-volume hybrid tank (400 litres) with integrated filling level sensor (cable length: 1.5 m, measurement range: 0 to 1 m), all connections, non-turbulent supply lines, overflow with siphon and connection options for extension module (ordered separately)
- Throughflow diaphragm expansion tank conforming to DIN 4807 for energy savings if there are very small leaks in the building
- Fully electronic EC-Rain switchgear (Easy Control) in a metallic housing, IP54 rating. With control electronics including solenoid valve, pressure transmitter 4–20 mA:
- Two separate LED displays (1 EC(e)-Booster printed circuit board to control up to two feeding pumps (storage tank pumps, 3~ 400V), 1 EC-Rain printed circuit board to control the high-pressure multistage centrifugal pump) show operating data, controller parameters, operating statuses of the pumps, error messages and history memory
- Menu navigation with seven-segment display and visualisation
- Factory-preset parameters for easy commissioning/start
- Setting of operating parameters and acknowledgement of fault messages using rotary knob
- Lockable main switch
- Elapsed time indicator for each pump and for the entire system
- Dry-running and overflow meter
- Fault memory for the last 10 faults
- Level monitoring of the rainwater storage tank with overflow detection and metering
- Hybrid tank: High water alarm and overflow detection
- Over-/underpressure detection
- Dry-running protection of pump
- Automatic periodic water exchange in the hybrid tank (intervals selectable)
- Collective run and fault signals via potential-free contacts
- Optional inputs/outputs (see interfaces)
Type key
Example: | Wilo-RainSystem AF 400-2Medana L205/EC2+1 |
RainSystem | System for rainwater utilisation for commercial use |
AF | Series (Aqua Feed) |
400 | Nominal content (l) of hybrid tank |
2 | Number of pumps |
Medana | Pump series |
2 | Rated volume flow (m3/h) |
05 | Number of single pump stages |
EC2+1 | EC-Rain switchgear (Easy Control); number of pressure-boosting and storage tank pump(s) |
Technical data
- Mains connection: 3~400 V (±10%), 50 Hz
- Max. negative suction head: 8 m
- Max. operating pressure: 10 bar
- IP rating: IP54
- Connections:
- Discharge-side manifold R 1 ½
- Inlets Rp 1 ¼, suction side inlets R 1 ¼
- Overflow connection DN 100
Materials
- Pump housing made of 1.4301 stainless steel
- Impeller made of Noryl
- Shaft made of 1.4031 stainless steel
- Mechanical seal made of ceramic/carbon
- Stage chambers made of Noryl
- Diaphragm expansion tank, steel, painted
Construction
Rainwater utilisation system ready for connection in a compact design, with all electronics and hydraulics already hooked up and installed on vibration-insulated baseplate with height-adjustable pedestal.
Pipework: R 1 1/2 discharge-side manifold, including transmitter unit with 8 l diaphragm expansion tank following the volume-flow principle and shut-off device with draining, manometer 0 to 10 bar, and ball valve on the suction and discharge side.
High-volume replenishment reservoir in a hybrid design (holds both drinking water and rainwater) 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: Two non-self-priming, corrosion-free, low-noise centrifugal pumps from the Medana CH1-L, Helix2.0 VE or Medana CH3-LE series.
Operation and parameterisation of the fully electronic EC-Rain switchgear (Easy Control) via menu-driven rotary knob. 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
- Installation and operating instructions
Options
- Rainwater storage tank level indicator
- Individual run/fault signals
- 60 Hz versions
- Extension module AF 400
Installation and operating instructions
Wilo-RainSystem AF 400
| Article Number | 2543936 |
| Edition | 2026-01-19 |
| Number of pages | 44 |
| Language | en |
PDF (9 MB)Wilo-Control EC-Rain, EC-rh
| Article Number | 4255941 |
| Edition | 2024-08 |
| Number of pages | 64 |
| Language | en |
PDF (9 MB)Wilo-Medana CH1-L, Wilo-Medana CH3-LE
| Article Number | 4272437 |
| Edition | 2025-09-30 |
| Number of pages | 20 |
| Language | en |
PDF (6 MB)Group Statement
Group Statement REACH
| Edition | 2021-05 |
| Number of pages | 5 |
| Language | language neutral |
PDF (287 KB)CE
CE 2055478-10
| Number of pages | 6 |
| Language | language neutral |
PDF (294 KB)