Compact rainwater utilisation system compliant with DIN 1989-100 and DIN EN 16941-1 with flexible manifold on the discharge side to save drinking water. Made up of two non-self-priming, horizontal, high-pressure multistage centrifugal pumps from the Wilo-Medana CH1-LSP series (pressure-boosting pumps) and feeding pumps (ordered separately) in the rainwater storage tank (see Wilo-Padus UNI or Wilo-Sub TWI series, for example). Mounted on a baseplate with height-adjustable feet, ready for connection, including control device for convenient system control.
– Fully automated rainwater utilisation or fresh water replenishment in case of drought in large commercial or industrial buildings.
Special features/Product advantages
– Compact, factory pre-assembled design enables easy installation
– Simple and intuitive operation via EC control device in conjunction with Green Button Technology
– Automatic replenishment with drinking water permits reliable, continuous operation even in drought conditions
– Flow-optimised design and deployment of IE2/IE3 motors enable energy-saving operation
– 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
– The integration into building automation via standard Modbus and optional extended communication via Gateway enables remote monitoring
– Quiet operation for very comfortable usage
Equipment/function
– Two high-pressure multistage centrifugal pumps from the Wilo-Medana CH1-LSP series with IE2/IE3 motor technology (IE2: up to 0.75 kW, IE3: from 0.75 kW)
– Baseplate in a vibration-insulated design with height-adjustable pedestal
– Two-way valve allows automatic switchover to drinking water replenishment in case of a lack of rainwater in the storage tank
– Replenishment reservoir (volume: 400 litres) functions as a hybrid tank with overflow conforming to EN 1717 (free drain type AA) to pump rainwater and demand-oriented replenishment of fresh water when rainwater storage tank is empty
– Throughflow diaphragm expansion tank (volume: 8 litres) conforming to DIN 4807 for energy savings if there are very small leaks in the building
– Filling level sensor with 1.5 m cable (measurement range 0 to 5 m) allows the amount of water in the hybrid tank to be detected
– All parts that come into contact with the fluid are corrosion-proof
on the discharge side:
– Ball valve at each pump
– Discharge manifold that can be connected on both sides
– Throughflow diaphragm expansion tank (8 litres)
– Pressure sensor 4 – 20 mA
– Pressure gauge
on the suction side:
– Pressure sensor 4 – 20 mA
– Pressure gauge
Automatic pump control with fully electronic EC-Rain control device (Easy Control) in metal housing, protection class IP54. Ready for connection as electronics and hydraulics are already hooked up. Mounted on an anti-corrosive painted tubular steel structure.
A working area of 60 cm around the system is recommended in order to facilitate the maintenance process.
Operation/display
– Two separate LED displays (1 EC(e) booster printed circuit board to control up to two feeding pumps (rainwater storage tank pumps), 1 EC-Rain printed circuit board to control the high-pressure multistage centrifugal pump of the Wilo-Medana CH1-L series) 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
Control
– Two non-self-priming centrifugal pumps from the Wilo-Medana CH1-LSP series (p-c control mode)
– Of up to two feeding pumps (ordered separately), for example Wilo-Padus UNI or Wilo-Sub TWI
– Adjustable switch-on and -off pressure for base- and peak-load pump in relation to the defined duty point
– Adjustable fill level in the hybrid tank to activate the feeding pump(s)
– Automatic, load-sensitive cut-in of the peak-load pump depending on the start-up pressure of the base-load pump
– Several user levels with different rights and menu scope and presentation of comprehensive information on the main screen
– Easy Actions menu for quick configuration of basic parameters
– Freely selectable operating mode of pump (manual, off, automatic) and two-way valves (opened, closed)
– Steady system control by means of pump cycling (configurable) and integrated test run on idle pumps
– Operating modes of the systems (manual or automatic)
– Automatic, configurable pump cycling
– Standard setting: Impulse – The base-load pump is cycled at each new demand, regardless of operating hours
– Alternatively: pump cycling of base-load pump after set number of operating hours (EC(e) booster interval: 6 hours; EC-Rain interval: 1 to 6 hours)
– Automatic, configurable pump test run (pump kick)
– Can be activated/deactivated
– Time between two pump test runs is freely programmable
– Disabling times can be programmed as desired
– Speed can be adjusted as desired
Monitoring
– System/level control in low-voltage range (24VDC)
– 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
– Calcination protection of the two-way valves
– Automatic periodic water exchange in the hybrid tank (intervals selectable)
– Collective run and fault signals via potential-free contacts
– Optional inputs/outputs (see interfaces)
Interfaces
– Potential-free contacts for SBM/SSM collective run and collective fault signals
– Logic reversal can be applied to SBM and SSM
– Optional inputs: Contacts for dry run (delay of 0 to 180 seconds), external off, overflow (replenishment reservoir/rainwater storage tank), dry run (rainwater storage tank)
– Optional outputs: two outputs with -60 to 60 second offset in relation to pump outputs 1 & 2 (if three-way valve is in the rainwater mode)
Recommended accessories (to be ordered separately)
– Up to two feeding pumps for installation in the rainwater storage tank (for example Wilo-Padus UNI or Wilo-Sub TWI)
– Suction hoses and suction filter (floating intake)
– Diaphragm expansion tank on the discharge side pursuant to conditions and requirements
Optional accessories
– Threaded cap or blind flange depending on the nominal diameter of the manifold
– Filter (on the discharge side)
– Additional motorised switchover valve for installation on the suction side (for suction lines that do not continuously rise)
Bus systems
– Modbus RTU
Materials
Pump housing: 1.4301
Shaft: 1.4301
Impeller: 1.4301
Operating Data
Fluid media: Water 100 %
Fluid temperature: 20.00 °C
Fluid concentration: 100.00 %
Requested flow:
Requested head:
Max. delivery head: 44.82 m
Min. fluid temperature: 5 °C
Max. fluid temperature: 35 °C
Maximum operating pressure: 10 bar
Max. ambient temperature: 40 °C
Motor data
Mains connection: 3~400V/50 Hz
Rated power: 0.55 kW
Rated speed: 2,900 1/min
Rated current: 1.5 A
Power factor:
Protection class motor: IP55
Insulation class: F
Installation dimensions
Overflow connection: Ø 110
Water connection: Rp 1
Pipe connection on the suction side: R 1½, PN 10
Pipe connection on the discharge side: R 1½, PN 6/10
Ordering information
Net weight, approx.: 145 kg
Brand: Wilo
Product description: RainSystem AF400-2 Medana L205/EC2+1
Article number: 4254796
