RAIN3-25 EM

Wilo-RAIN3 is a rainwater utilisation system for conserving drinking water, for the water supply of, for example, WC cisterns or for garden irrigation. Its compact and standardised construction in accordance with EN 1717 and DIN 1989 and its numerous hydraulic connection options speed up and simplify every new installation or replacement. In addition, the intuitive interface of the touch LCD combined with numerous smart functions such as self-protection routines ensure convenient operation and high reliability.

Special features/product benefits

• Easy installation thanks to its ready-to-plug system and compact design with various hydraulic connection options
• A unique combination of intuitive LCD touchscreen operation and a wide range of control functions facilitate convenient operation and easy-to-use settings
• High level of reliability thanks to integrated self-protection routines
• Non-return valve and replenishment reservoir in accordance with DIN 1989 and EN 1717 ensure hygienic safety
• Quiet operation in installations close to living space
• Controls can be conveniently updated by Wilo Service via Wi-Fi

Equipment/functions

Ready for connection module with compact construction, consisting of:

• HiMulti 3 P self-priming centrifugal pump, mounted on a base frame with oscillation absorbers
• 11 l replenishment reservoir for fresh water replenishment with float valve
• 3-way valve
• Front and rear cover
• Connection on the discharge side, G 1″ hose
• Connection on the suction side, G 1″ hose
• Connection for municipal water supply network: G ¾″, max 6 bar
• 3 m mains connection cable and plug
• 4 … 20 mA filling level sensor with 20 m cable for rainwater level monitoring in the storage tank
• 4 … 20 mA pressure sensor
• Overflow sensor installed in the replenishment reservoir
• Acoustic alarm
• Potential-free contact available for optional external alarm or fault message
• Electronic control device with colour LCD touchscreen

Operation/display

• Display with colour LCD touchscreen
• Permanent display for the fill level in the rainwater storage tank, operating pressure and mode (automatic – manual), pumping mode (rainwater – tap water)
• Logging of the last 10 faults

Control

Fully automatic control of:

• HiMulti 3 P self-priming centrifugal pump
• Configurable triggering pressure
• Operating modes of the systems (manual or automatic)
• 3-way valve switchover between rainwater operation and municipal water supply network
• Level monitoring of the rainwater storage tank
• Replenishment reservoir overflow detection
• Dry-running protection of pump
• Self-priming support
• Automatic periodical water exchange in the replenishment reservoir (selectable intervals)
• Run signals and fault messages
• Optional external alarm or fault message
• Optional submersible pump (rainwater storage tank pump)

Monitoring

• 4 … 20 m filling level sensor monitors rainwater fill level in storage tank
• Current supply pressure
• Dry-running protection of pump
• Continuous monitoring of sensor cables
• Protection of pump mains voltage supply via circuit breaker
• Replenishment reservoir overflow

Interfaces

• Relay for optional submersible pump
• Potential-free contact available for external alarm or fault message to BMS
• Potential-free contact for sensor to detect overflow or backflow

Additional electrical connections at the control device

Can be used to control optional devices or for communication:

• Connection of a rainwater storage tank pump:
  • In case of possible suction problems if the maximum negative suction head of the main pump is exceeded (e.g. rainwater storage tank too deep or pipes too long), connect a rainwater storage tank pump (submersible pump, 230 V, max. 3 A) to the control device. Pumps for these applications are available from Wilo. Consult specialist technician.
• Potential-free contact can be used for fault messages
• Sensor for overflow or backflow detection